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Sample records for partial situs inversus

  1. Partial sternotomy coronary surgery with triple-vessel disease in dextrocardia and situs inversus totalis.

    PubMed

    Su, Pi Xiong; Gu, Song; Liu, Yan; Gao, Jie

    2013-07-01

    Dextrocardia associated with situs inversus totalis is a rare congenital condition. A small number of cases with these conditions have been reported who underwent myocardial revascularization via the on-pump or off-pump techniques. Among them, only 1 patient with dextrocardia and situs inversus totalis was reported to have the procedure performed with minimally invasive coronary surgery via a right anterior small thoracotomy. However, the case was a single-vessel disease and only one graft was achieved. We describe the case of a 65-year old female patient with triple-vessel obstructive coronary diseases who was successfully revascularized with three grafts using a minimally invasive technique. This was achieved via partial sternotomy and employing off-pump coronary artery bypass grafting.

  2. Laparoscopic Cholecystectomy in Situs Inversus Totalis

    PubMed Central

    S, Mahesh Shetty; BB, Sunil Kumar

    2014-01-01

    Situs inversus totalis is a rare condition where the organs in the body is placed in the opposite side. When such patient presents with the diseases of the intra abdominal organs the diagnosis is challenging and the operative procedure to be performed will be difficult. This may require the anticipation of variations in anatomy, ergonomic changes required during surgery and mastery over the operative skills in reversed anatomy. Cholelithiasis in situs inversus totalis is one such situation. Herein we report a case of situs inversus totalis who underwent successful laparoscopic cholecystectomy for symptomatic gallbladder calculi. PMID:25177601

  3. A case of complete situs inversus.

    PubMed

    Marta, M João; Falcão, L Menezes; Saavedra, J A; Ravara, Luciano

    2003-01-01

    Complete situs inversus is a rare syndrome, with overall frequency estimated at 1/10,000 births, resulting from abnormal rotation of the cardiac tube during embryogenesis, of unknown mechanism. Recent studies suggest that left-right asymmetry defects are likely to be due to genetic abnormalities in the lefty, nodal, i.v., HAND, ZIC3, Shh, ACVR2B and/or Pitxz genes. In dextrocardia with situs inversus the heart is structurally normal in 90-95% of cases, in contrast to dextroversion (dextrocardia with situs solitus), which has a high incidence of structural cardiac defects. Atrial septal defect is one of the most common congenital cardiac anomalies in adults. Diagnosis is based on clinical manifestations and simple complementary diagnostic exams like abdominal and thoracic radiography and electrocardiogram. Prognosis in isolated dextrocardia depends on the congenital cardiac defects present. By contrast, in dextrocardia with situs inversus life expectancy is similar to that of the general population. The authors present the case of a 64-year-old German man admitted to the emergency care unit with a diagnosis of embolic stroke due to atrial fibrillation with fast ventricular rate. As clinical history could not be assessed due to language limitations, routine admission tests were performed. They revealed complete situs inversus with corrected ostium secundum atrial septal defect. Finally, the anatomic, pathologic, embryologic and etiologic features of complete situs inversus and related abnormalities of the cardiac structures are presented. Special emphasis is given to genetic abnormalities, the study of which has seen great advances since the 1990s thanks to new techniques of DNA analysis.

  4. Laparoscopic cholecystectomy for left sided gallbladder in situs inversus totalis.

    PubMed

    Butt, Muhammad Qasim; Chatha, Sohail Saqib; Ghumman, Adeel Qamar; Rasheed, Asif; Farooq, Mahwish; Ahmed, Javed

    2015-04-01

    Situs inversus totalis is a rare condition affecting intra abdominal and intra thoracic organs. Situs inversus usually remains asymptomatic. Life expectancy is normal in the absence of rare cardiac abnormalities. Left sided gallbladder can occur even without situs inversus totalis. Cholelithiasis is not more common in patients with situs inversus than the general population. However, these patients may pose a diagnostic difficulty. An ultrasound scan can confirm the presence of gallstones and the left-sided gallbladder. Here we present the case of a 40-year female with this diagnosis who was diagnosed on abdominal scanning and underwent laparoscopic cholecystectomy for left sided cholelithiasis.

  5. Hepatic Segrnentectomy on Primary Liver Cancer with Situs Inversus Totalis

    PubMed Central

    Itakura, T.; Tanaka, H.; Hatanaka, N.; Nakamuro, M.; Miyata, M.; Izumi, H.

    1996-01-01

    We present the first case treated by hepatic segmentectomy in a 69-year-old woman with primary liver cancer and situs inversus totalis. The situs inversus did not cause any technical problems during the operation, which was conducted under guidance of intraoperative ultrasonography. PMID:8725459

  6. [Situs inversus totalis: a case report].

    PubMed

    Fragoso-Sánchez, Juan Arturo; Castillo-Ramírez, Lizeth; Sernas-Romero, Nelson

    2015-01-01

    The situs inversus totalis is a rare condition associated with multiple congenital malformations, the most common heart defects and is associated with more complex syndromes such as Kartagener. Most of the time, the defect is found after a physical examination for other reason. We reported the case of a patient diagnosed on the first day of extra-uterine life. It has been the first case reported in the state of Guerrero, with several prenatal history of interest. Our aim is to emphasize that early diagnosis completely changes the future healthcare. Reviewing the literature, it does not have any algorithm on searching protocol of congenital malformations and management attention on common pathologies.

  7. PERFORATED DUODENAL ULCER ASSOCIATED WITH SITUS INVERSUS AND DEXTROCARDIA.

    PubMed

    Ibrahim, Mumtaz; Hussain, Dildar; Waheed, Seema; Tahir, Raazia; Haider, Ghulam; Ali, Nauvan; Sarfraz, Shahid Latif

    2016-01-01

    A 32 years old gentleman, presented in emergency department, with complaints of sudden onset of severe upper abdominal pain, associated with nausea and vomiting. He was a known case of acid peptic disease. His abdominal examination showed signs of peritonitis. X-ray chest showed pneumoperitoneum, with dextrocardia. Ultrasound showed situs inversus. Exploration confirmed the diagnosis of perforated ulcer and situs inversus. Grahm's patch repair of perforation was done. His postoperative recovery was smooth.

  8. Hand-Assisted Laparoscopic Donor Nephrectomy in Complete Situs Inversus

    PubMed Central

    Gahagan, John V.; Whealon, Matthew D.; Reddy, Uttam; Foster, Clarence E.

    2016-01-01

    Abstract Complete situs inversus is a rare congenital anomaly characterized by transposition of organs. We report a case of renal transplantation using a kidney from a living complete situs inversus donor. The recipient was a 59-year-old female with end-stage renal disease because of type 2 diabetes mellitus. The donor was the 56-year-old sister of the recipient with complete situs inversus. CT angiogram of the abdomen and pelvis showed complete situs inversus and an otherwise normal appearance of the bilateral kidneys with patent bilateral single renal arteries and longer renal vein in the right kidney. The patient was taken to the operating room for a hand-assisted laparoscopic right donor nephrectomy. The patient tolerated the procedure well and was discharged home in good condition on postoperative day 1. The recipient experienced no episodes of acute rejection or infection, with serum creatinine levels of 0.8–1.2 mg/dL. Laparoscopic donor nephrectomy in a patient with complete situs inversus remains a technically feasible operation and the presence of situs inversus should not preclude consideration for living kidney donation. PMID:27579434

  9. Hand-Assisted Laparoscopic Donor Nephrectomy in Complete Situs Inversus.

    PubMed

    Gahagan, John V; Whealon, Matthew D; Reddy, Uttam; Foster, Clarence E; Ichii, Hirohito

    2016-01-01

    Complete situs inversus is a rare congenital anomaly characterized by transposition of organs. We report a case of renal transplantation using a kidney from a living complete situs inversus donor. The recipient was a 59-year-old female with end-stage renal disease because of type 2 diabetes mellitus. The donor was the 56-year-old sister of the recipient with complete situs inversus. CT angiogram of the abdomen and pelvis showed complete situs inversus and an otherwise normal appearance of the bilateral kidneys with patent bilateral single renal arteries and longer renal vein in the right kidney. The patient was taken to the operating room for a hand-assisted laparoscopic right donor nephrectomy. The patient tolerated the procedure well and was discharged home in good condition on postoperative day 1. The recipient experienced no episodes of acute rejection or infection, with serum creatinine levels of 0.8-1.2 mg/dL. Laparoscopic donor nephrectomy in a patient with complete situs inversus remains a technically feasible operation and the presence of situs inversus should not preclude consideration for living kidney donation. PMID:27579434

  10. Handedness and situs inversus in primary ciliary dyskinesia.

    PubMed

    McManus, I C; Martin, N; Stubbings, G F; Chung, E M K; Mitchison, H M

    2004-12-22

    ... The limbs on the right side are stronger. [The] cause may be ... [that] ... motion, and abilities of moving, are somewhat holpen from the liver, which lieth on the right side. (Sir Francis Bacon, Sylva sylvarum (1627).)Fifty per cent of people with primary ciliary dyskinesia (PCD) (also known as immotile cilia syndrome or Siewert-Kartagener syndrome) have situs inversus, which is thought to result from absent nodal ciliary rotation and failure of normal symmetry breaking. In a study of 88 people with PCD, only 15.2% of 46 individuals with situs inversus, and 14.3% of 42 individuals with situs solitus, were left handed. Because cerebral lateralization is therefore still present, the nodal cilia cannot be the primary mechanism responsible for symmetry breaking in the vertebrate body. Intriguingly, one behavioural lateralization, wearing a wrist-watch on the right wrist, did correlate with situs inversus. PMID:15615683

  11. Handedness and situs inversus in primary ciliary dyskinesia.

    PubMed

    McManus, I C; Martin, N; Stubbings, G F; Chung, E M K; Mitchison, H M

    2004-12-22

    ... The limbs on the right side are stronger. [The] cause may be ... [that] ... motion, and abilities of moving, are somewhat holpen from the liver, which lieth on the right side. (Sir Francis Bacon, Sylva sylvarum (1627).)Fifty per cent of people with primary ciliary dyskinesia (PCD) (also known as immotile cilia syndrome or Siewert-Kartagener syndrome) have situs inversus, which is thought to result from absent nodal ciliary rotation and failure of normal symmetry breaking. In a study of 88 people with PCD, only 15.2% of 46 individuals with situs inversus, and 14.3% of 42 individuals with situs solitus, were left handed. Because cerebral lateralization is therefore still present, the nodal cilia cannot be the primary mechanism responsible for symmetry breaking in the vertebrate body. Intriguingly, one behavioural lateralization, wearing a wrist-watch on the right wrist, did correlate with situs inversus.

  12. [Mitral valve replacement in dextrocardia and situs inversus].

    PubMed

    Uchimuro, Tomoya; Fukui, Toshihiro; Matsuyama, Shigefumi; Tabata, Minoru; Takanashi, Shuichirou

    2012-09-01

    Cardiac surgery for acquired valvular diseases in patients with dextrocardia is extremely rare. We report a surgical case of mitral valve replacement and tricuspid annuloplasty in a patient with dextrocardia and situs inversus. A 74-year-old man with dextrocardia and situs inversus, who had undergone patch closure of atrial septal defect 25 years before, was referred for surgical treatment of severe mitral and tricuspid valve regurgitation. Preoperative computed tomography( CT) showed dextrocardia, situs inversus, interruption of the inferior vena cava with an azygos vein continuation, and drainage of the hepatic vein into the right atrium. Under redo-median sternotomoy, cardiopulmonary bypass was established by cannulating the ascending aorta, the superior vena cava, the right femoral and the hepatic veins. The surgeon operated from the left side of the operating table, and had an excellent exposure to the mitral and tricuspid valves during the operation. Mitral valve replacement and tricuspid annuloplasty were performed successfully. The postoperative course was uneventful.

  13. Dextrocardia with situs inversus totalis: coronary artery bypass grafting.

    PubMed

    Hashmi, Salila; Anis, Mariam; Darr, Umer

    2012-01-01

    Dextrocardia with situs inversus is a rare congenital abnormality involving a left-handed mal rotation of the visceral organs. The incidence of coronary artery disease is the same as that in the general population. Performing coronary artery bypass surgery on patients with dextrocardia poses a more challenging task. It is recommended that the right internal mammary artery be the first choice of graft for the anterior descending artery for a "situs inversus" situation. We report 2 cases of patients with Dextrocardia who developed coronary artery disease and underwent coronary artery bypass grafting. Also mentioned is the slight difference in our technique.

  14. Congenital atrichia associated with situs inversus and mesocardia.

    PubMed

    Sacchidanand, S; Sahana, Ms; Hiremagalore, Ravi; Asha, Gs

    2012-07-01

    Congenital alopecia includes a broad differential diagnosis and presents a diagnostic and therapeutic challenge for the physician. Congenital atrichia is a rare form of irreversible alopecia that is usually inherited as an autosomal recessive pattern. We report a 2-year-old male child presenting with total alopecia of scalp, eyebrows, eyelashes, and body hair since birth. The child had cardiac malposition with situs inversus of the viscera. Computed tomography of the chest and abdomen revealed median position of the heart with transposition of abdominal viscera. To our knowledge, this is the first case of congenital atrichia associated with situs inversus and mesocardia.

  15. Coexisting Situs Inversus Totalis and Immune Thrombocytopenic Purpura

    PubMed Central

    Gundogdu, Kemal; Altintoprak, Fatih; Uzunoğlu, Mustafa Yener; Dikicier, Enis; Zengin, İsmail; Yağmurkaya, Orhan

    2016-01-01

    Situs inversus totalis is a rare congenital abnormality with mirror symmetry of mediastinal and abdominal organs. Immune thrombocytopenic purpura is an autoimmune disease with destruction of thrombocytes. This paper is presentation of surgical approach to a case with coexistence of these two conditions. PMID:26981307

  16. Splenic Injury in Situs Inversus Totalis – A Surgical Challenge

    PubMed Central

    Kamath, Bharat; Chandorkar, ITI

    2015-01-01

    Situs inversus totalis is a rare congenital anomaly in which position of the heart and all abdominal viscera is reversed. Situs abnormalities usually go unnoticed but may be recognized by radiography or ultrasonography as an incidental finding or during evaluation for congenital heart diseases. We present such an extremely rare and to the best of our knowledge the third reported case of an injured spleen in the right hypochondrium, following seemingly trivial blunt trauma in a patient with situs inversus totalis who underwent splenectomy. The presence of associated congenital heart defects, visceral anatomical variations and mirror imaging makes the anaesthetic management as well as the surgical exercise a challenging one in such cases. PMID:26155517

  17. Anaesthetic Management for Appendectomy in a Patient with Situs Inversus Totalis

    PubMed Central

    Koç, Alparslan; Sönmez, Yalçın; Balaban, Onur

    2016-01-01

    Situs inversus totalis is a congenital syndrome, in which all the internal organs are in the opposite position, including dextrokardia. Most patients are asymptomatic and maintain their normal life. Kartagener syndrome may accompany situs inversus totalis. Diagnosis may be overlooked in patients with situs inversus totalis in emergency situations. Patients with this syndrome should inform the clinician as this will facilitate the diagnosis. Acute appendicitis is an emergency situation that would require urgent intervention. Appendicitis symptoms can be observed in the left lower quadrant of patients. We present a case concerning the anaesthetic management of a patient with situs inversus undergoing an emergency appendectomy. PMID:27366569

  18. Preduodenal Portal Vein with Situs Inversus Totalis causing Duodenal Obstruction.

    PubMed

    D'souza, Flavia; Nage, Amol; Bendre, Pradnya

    2016-01-01

    Congenital duodenal obstruction sometimes may be secondary to unusual entities like preduodenal portal vein (PDPV) the identification of which is very important to avoid inadvertent injury or incorrect surgery. A 6-day old neonate presented with congenital duodenal obstruction. Investigations revealed situs inversus totalis with many congenital cardiovascular anomalies. At operation preduodenal portal vein and malrotation were found. Correction of malrotation and bypass duodeno-duodenostomy were done.

  19. Preduodenal Portal Vein with Situs Inversus Totalis causing Duodenal Obstruction

    PubMed Central

    D’souza, Flavia; Bendre, Pradnya

    2016-01-01

    Congenital duodenal obstruction sometimes may be secondary to unusual entities like preduodenal portal vein (PDPV) the identification of which is very important to avoid inadvertent injury or incorrect surgery. A 6-day old neonate presented with congenital duodenal obstruction. Investigations revealed situs inversus totalis with many congenital cardiovascular anomalies. At operation preduodenal portal vein and malrotation were found. Correction of malrotation and bypass duodeno-duodenostomy were done. PMID:27398325

  20. Lung cancer mimicking aortic dissecting aneurysm in a patient with situs inversus totalis.

    PubMed

    Lin, Feng; Yang, Mei; Guo, Chenglin; Liu, Lunxu

    2016-03-01

    Lung cancer and situs inversus totalis are two completely irrelevant conditions. The likelihood of both conditions occurring simultaneously in one person is very rare. We report here a case of a 50-year-old man who presented with intermittent chest pain. Enhanced computed tomography of the chest showed situs inversus totalis and a round mediastinal mass embracing the thoracic aorta. The primary diagnosis was suggested as pseudo aortic dissecting aneurysm. However, a tumor in the right lower lung was discovered during surgery, which enclosed and invaded the thoracic aorta. Finally, the patient successfully underwent right lower lobectomy accompanied by lymph node excision and partial replacement of the thoracic aorta with an artificial vascular graft under cardio-pulmonary bypass. PMID:27042231

  1. Incidentally found situs inversus with dextrocardia: inferior myocardial infarction in an 86-year-old woman.

    PubMed

    Hudzik, Bartosz; Polonski, Lech

    2012-10-01

    Situs inversus with dextrocardia is a rare condition. Yet, the incidence of atheroclerosis and myocardial infarction in patients with dextrocardia is similar to that in general population. The diagnosis of acute myocardial infarction is somewhat tricky and difficult if the dextrocardia is not recognized. We present the electrocardiogram, coronary angiograms, and chest radiogram of a patient with incidentally found situs inversus with dextrocardia.

  2. A Rare Triad of Giant Occipital Encephalocele with Lipomyelomeningocele, Tetralogy of Fallot, and Situs Inversus

    PubMed Central

    Franco, Arie; Jo, Stephanie Y; Mehta, Amar S; Pandya, Dave J; Yang, Carina W

    2016-01-01

    Giant encephalocele is an uncommon congenital anomaly with very few published reports available in the English literature. Tetralogy of Fallot associated with situs inversus is also infrequently reported. To our knowledge there are no published reports of an association between giant encephalocele and Tetralogy of Fallot. The additional finding of situs inversus results in a rare pathologic triad, not heretofore described. PMID:27200165

  3. A unique case of right-sided Poland syndrome with true dextrocardia and total situs inversus.

    PubMed

    Atasoy, Halil I; Yavuz, Taner; Altunrende, Sevil; Guven, Melih; Kılıcgun, Ali; Polat, Omer; Yesiller, Erkan; Duzenli, Selma

    2013-02-01

    Poland syndrome has been reported to be associated with true dextrocardia, but not with true situs inversus. In this report, we describe the first patient with total situs inversus in medical literature and try to highlight the syndrome's probable etiology and pathogenetic mechanisms in utero.

  4. Glaucoma in an eye with situs inversus of the optic disc.

    PubMed

    Han, Sang Youn; Hwang, Young Hoon

    2014-05-01

    Situs inversus of the optic disc is a congenital abnormality characterized by dysversion of the optic nerve head and surrounding retinal vessels. Here, we report the retinal nerve fiber layer (RNFL) characteristics of eyes with situs inversus of the optic discs with and without glaucoma, as imaged using spectral-domain optical coherence tomography (OCT). OCT findings of an eye with situs inversus of optic disc and uveitic glaucoma revealed abnormal RNFL thinning. After six months of treatment, progressive RNFL thinning in the superior-nasal and inferior-nasal areas was found. The fellow eye with situs inversus of the optic disc without glaucoma showed a thicker nasal RNFL, a thinner temporal RNFL, and more nasally located RNFL peak locations compared with normative database. RNFL thickness characteristics in eyes with situs inversus of the optic discs, presented here, should be considered when assessing glaucoma in eyes with this abnormality.

  5. Situs inversus with dextrocardia in a mummy case.

    PubMed

    Zanatta, Alberto; Zampieri, Fabio; Bonati, Maurizio Rippa; Frescura, Carla; Scattolin, Giuliano; Stramare, Roberto; Thiene, Gaetano

    2014-01-01

    A mummy of a young woman, who died due to tuberculous peritonitis and salpingitis, is conserved in the Pathological Anatomy Museum of the University of Padua. It was found at autopsy to have situs inversus of viscera with dextrocardia, apparently in the absence of other congenital defects. A 64-section scanner computed tomography (CT) on the specimen was carried out to investigate the internal condition of organs. The CT revealed the presence in the heart of a muscular ventricular septal defect and of calcific deposits on visceral pericardium and aortic wall, in keeping with sequelae of previous tuberculous pericarditis.

  6. Coronary revascularization in a patient with dextrocardia and situs inversus.

    PubMed

    Siddiqi, Mohammad Salman; Al Harrasi, Khoula; Ziadinov, Edem; Al-Sabti, Hilal; Sharma, Ashok Kumar

    2014-10-01

    A few cases of coronary artery bypass surgery in patients with dextrocardia and situs inversus have been reported so far worldwide. This is the first reported case from the Gulf region. The operation was performed with the surgeon standing on the left side. Grafts included right internal mammary artery to the left anterior descending artery, and saphenous vein to the diagonal and obtuse marginal arteries. The patient was discharged home after 12 days, with no complication. He was doing well after 3 months of follow-up.

  7. Successful transradial percutaneous coronary intervention in a patient with dextrocardia and situs inversus.

    PubMed

    Sinha, Ramanand P; Agarwal, Deepesh; Sarang, Arohi Mehul; Thakkar, Ashok Suryakant

    2015-01-01

    Dextrocardia with situs inversus is a rare clinical entity with an estimated incidence ranges from 1 in 8000 to 1 in10,000. Percutaneous intervention in patient with dextrocardia and situs inversus is clinically challenging due to abnormal orientation of coronary geometry and the intervention requires appropriate use of guiding catheters, engagement technique, appropriate radiological angles as well as views. In this case-report, we describe percutaneous intervention with stenting in 48-year-old male patient with dextrocardia and situs inversus. We successfully deployed drug-eluting stents in right coronary artery and left circumflex artery.

  8. Tetralogy of fallot, dextrocardia, and situs inversus associated with total anomalous pulmonary venous return.

    PubMed

    Talwar, Sachin; Rajashekar, Palleti; Muthukkumaran, Subramanian; Airan, Balram

    2013-09-01

    We report a 3-year-old patient with tetralogy of Fallot (TOF), dextrocardia, situs inversus (SI), and total anomalous pulmonary venous return. This combination of anomalies is extremely unusual. The management is discussed and the literature is reviewed.

  9. Situs inversus totalis with a mature teratoma of the posterior mediastinum: A case report

    PubMed Central

    QI, YU; ZHANG, CHUNYANG; LIU, DONGLEI; YANG, YANG; ZHAO, SONG

    2016-01-01

    Situs inversus totalis is an unusual disease with a low incidence. The co-existence of situs inversus totalis with a teratoma is extremely rare. To the best of our knowledge, there is no data on the association between situs inversus totalis and teratoma in the literature. The present study therefore describes the first such case in a 23-year-old female. The patient presented with intermittent chest tightness, which had lasted for ~3 years. Following radiological examination, the patient was diagnosed with situs inversus totalis and a mature teratoma in the posterior mediastinum. Surgical resection was performed to remove the teratoma and the patient subsequently made a full recovery. Follow-up X-ray and computed tomography examinations were performed 6 months after surgery, which revealed no disease recurrence. PMID:26893706

  10. Total endoscopic robotic atrial septal defect repair in a patient with dextrocardia and situs inversus totalis.

    PubMed

    Iino, Kenji; Watanabe, Go; Ishikawa, Norihiko; Tomita, Shigeyuki

    2012-04-01

    Situs inversus with mirror-image of the heart is a rare condition. The present report describes a case of a patient with dextrocardia with situs inversus who had atrial septal defect with multiple holes in the fossa ovalis. The patient underwent total endoscopic atrial septal defect repair using the da Vinci surgical system. This procedure was achieved safely with good clinical and excellent cosmetic results.

  11. Myocardial Perfusion SPECT Imaging in Dextrocardia with Situs Inversus: A Case Report.

    PubMed

    Ayeni, Olusegun Akinwale; Malan, Nico; Hammond, Emmanuel Niiboye; Vangu, Mboyo-Di-Tamba Heben

    2016-01-01

    Dextrocardia is a cardiac positional anomaly in which the heart is located in the right hemithorax with its base-to-apex axis directed to the right and caudad. Situs inversus is an autosomal recessive disorder that causes organs in the chest and abdomen to be positioned in a mirror image from their normal position. Dextrocardia may occur in isolation or as part of situs inversus. Similarly, situs inversus may occur with or without dextrocardia. Situs inversus accompanied with dextrocardia (situs inversus totalis) is a rare congenital abnormality occurring in 0.01% of live births. Herein, we present the case of a 35-year-old man with previously diagnosed situs inversus totalis with mirror-image dextrocardia, referred to our facility for diagnosis of coronary artery disease (CAD). The incidence and presentation of CAD in patients with dextrocardia are similar to the normal population. However, considerable attention should be paid to the acquisition of myocardial perfusion scintigraphy and data processing/analysis in this group of patients. The present case highlights the distinctive applications and potential pitfalls of myocardial perfusion single-photon emission computed tomography (SPECT) imaging in patients with dextrocardia.

  12. Myocardial Perfusion SPECT Imaging in Dextrocardia with Situs Inversus: A Case Report

    PubMed Central

    Ayeni, Olusegun Akinwale; Malan, Nico; Hammond, Emmanuel Niiboye; Vangu, Mboyo-Di-Tamba Heben

    2016-01-01

    Dextrocardia is a cardiac positional anomaly in which the heart is located in the right hemithorax with its base-to-apex axis directed to the right and caudad. Situs inversus is an autosomal recessive disorder that causes organs in the chest and abdomen to be positioned in a mirror image from their normal position. Dextrocardia may occur in isolation or as part of situs inversus. Similarly, situs inversus may occur with or without dextrocardia. Situs inversus accompanied with dextrocardia (situs inversus totalis) is a rare congenital abnormality occurring in 0.01% of live births. Herein, we present the case of a 35-year-old man with previously diagnosed situs inversus totalis with mirror-image dextrocardia, referred to our facility for diagnosis of coronary artery disease (CAD). The incidence and presentation of CAD in patients with dextrocardia are similar to the normal population. However, considerable attention should be paid to the acquisition of myocardial perfusion scintigraphy and data processing/analysis in this group of patients. The present case highlights the distinctive applications and potential pitfalls of myocardial perfusion single-photon emission computed tomography (SPECT) imaging in patients with dextrocardia. PMID:27408900

  13. Probable autosomal recessive inheritance of polysplenia, situs inversus and cardiac defects in an Amish family.

    PubMed

    Arnold, G L; Bixler, D; Girod, D

    1983-09-01

    We report on an Amish family with five individuals in two generations with complex congenital heart disease. Autopsy findings in one and clinical examination in the others support the diagnosis of polysplenia "syndrome." In a mouse model, this spectrum of situs abnormalities and cardiovascular defects shows recessive inheritance with homozygotes having either situs solitus or situs inversus or ambiguous situs. The parents of the four affected sibs are fourth cousins. We think that the father of these four children is an affected but clinically normal homozygote, that his deceased sister was an affected homozygote, and it seems likely that they too had consanguinous parents. PMID:6638068

  14. Salivary gland choristoma of the middle ear in a child with situs inversus totalis.

    PubMed

    Toros, Sema Zer; Egeli, Erol; Kiliçarslan, Yasin; Gümrükçü, Gülistan; Gökçeer, Tanju; Noşeri, Hülya

    2010-06-01

    Salivary gland choristoma of the middle ear cavity is an extremely rare entity. It is thought to be a developmental abnormality and may be associated with abnormalities of adjacent structures. We report a case of salivary gland choristoma of the middle ear with prominent Körner's septum in a 7-year-old girl with situs inversus totalis. Situs inversus totalis is the mirror image reversal of the normal position of the internal organs and frequently associated with other congenital anomalies. This patient is the first reported case with situs inversus totalis, having middle ear salivary gland choristoma and prominent bilateral Körner's septae. The management and the differential diagnosis of this condition are discussed with the review of the literature.

  15. Hyperacute anterior myocardial infarction in a patient with dextrocardia and situs inversus.

    PubMed

    Ciçek, Davran; Eldem, Olcay; Gökay, Seher; Müderrisoğlu, Haldun

    2012-03-01

    Dextrocardia with situs inversus is an uncommon congenital condition in which the major visceral organs are reversed. The clinical diagnosis and electrocardiographic localization of myocardial infarctions in these patients remain a great challenge unless dextrocardia is recognized. A 50-year-old male with known dextrocardia and situs inversus presented with acute chest pain radiating to the right arm. The reversed normalized electrocardiogram showed acute anterior myocardial infarction and cardiac catheterization showed a proximal occlusion of the left anterior descending artery. He underwent coronary angioplasty with stenting, resulting in relief of chest pain and improvement in his clinical condition.

  16. Situs inversus and ciliary abnormalities: 20 years later, what is the connection?

    PubMed

    Pennekamp, Petra; Menchen, Tabea; Dworniczak, Bernd; Hamada, Hiroshi

    2015-01-01

    Heterotaxy (also known as situs ambiguous) and situs inversus totalis describe disorders of laterality in which internal organs do not display their typical pattern of asymmetry. First described around 1600 by Girolamo Fabrizio, numerous case reports about laterality disorders in humans were published without any idea about the underlying cause. Then, in 1976, immotile cilia were described as the cause of a human syndrome that was previously clinically described, both in 1904 by AK Siewert and in 1933 by Manes Kartagener, as an association of situs inversus with chronic sinusitis and bronchiectasis, now commonly known as Kartagener's syndrome. Despite intense research, the underlying defect of laterality disorders remained unclear. Nearly 20 years later in 1995, Björn Afzelius discussed five hypotheses to explain the connection between ciliary defects and loss of laterality control in a paper published in the International Journal of Developmental Biology asking: 'Situs inversus and ciliary abnormalities: What is the connection?'. Here, nearly 20 research years later, we revisit some of the key findings that led to the current knowledge about the connection between situs inversus and ciliary abnormalities. PMID:25589952

  17. Tetralogy of fallot with dextrocardia and situs inversus in a 7-year-old boy.

    PubMed

    Dilorenzo, Michael; Weinstein, Samuel; Shenoy, Rajesh

    2013-01-01

    Tetralogy of Fallot is one of the most frequently diagnosed congenital cardiac abnormalities; however, its association with dextrocardia and situs inversus is reported only rarely. We report a case of these findings in a 7-year-old boy, describe the patient's postoperative course, and review the medical literature relevant to these combined conditions.

  18. Successful right coronary artery drug-eluting stent implantation in a male patient with situs inversus.

    PubMed

    Tsioufis, Costas; Chatzis, Dimitris; Kallikazaros, Ioannis; Stefanadis, Christodoulos

    2011-01-01

    We describe a case of successful right coronary artery angioplasty in a male subject with situs inversus. Although the interventional management of such individuals follows the standard general rules, there are also some technical aspects that should be taken into consideration in this special clinical setting.

  19. Antenatal diagnosis of mirror-image dextrocardia in association with situs inversus and Turner's mosaicism.

    PubMed

    Ortiga, D J; Chiba, Y; Kanai, H; Hosono, T

    2001-10-01

    We describe the antenatal diagnosis of a fetus with mirror-image dextrocardia, complete situs inversus and Turner's mosaicism (45,XO/46,XY) that was artificially terminated at 19 weeks. Autopsy confirmed our initial findings. This case represents an unusual combination of anomalies rarely encountered in clinical practice.

  20. Multidisciplinary Rehabilitation in a Case of Congenital Aglossia with Situs Inversus Totalis.

    PubMed

    Tripathi, Tulika; Neha; Gill, Shubhra; Rai, Priyank

    2015-01-01

    Aglossia is a rare congenital disorder with complete absence of tongue that can also be associated with limb deformities, syndromes and aberrant positioning of the visceral organs. The present case report describes multidisciplinary rehabilitation in a patient with Aglossia Congenita along with dextrocardia, situs inversus, mutilated dentition with a lack of occlusal table and compromised esthetics.

  1. Agnathia Holoprosencephaly and Situs Inversus in A Neonate Born to an Alcoholic Mother

    PubMed Central

    Goswami, Dibyajyoti

    2015-01-01

    Agnathia, holoprosencephaly and situs inversus complex is an extremely rare form of congenital malformation. Though a few cases have been reported from other parts of the world, to the best of our knowledge none has been reported from India so far. Maternal alcoholism is regarded as an important factor causing holoprosencephaly. Disruption of the Shh gene signaling pathway is also said to be a factor for the occurrence of holoprosencephaly as well as left right asymmetry. Though several factors are suspected as a cause of this deformity, the precise aetiopathogenesis is still under debate. Lack of knowledge might be due to paucity of data from cases due to its rarity. Hereby, we are presenting a case of agnathia, holoprosencephaly and situs inversus born at 32 wk of gestation by an alcoholic mother. Externally the child had agnathia and cyclopia. There was no mandible or any oral cavity. It was accompanied by noticeable limb deformity. Internally there was holoprosencephaly, situs inversus totalis with several visceral abnormalities. To the best of our knowledge this is the first case of agnathia, holoprosencephaly and situs inversus complex to be reported in an indexed literature from India. This report also strengthens the association of maternal alcoholism with occurrence of holoprosencephaly. PMID:26155468

  2. Living donor liver transplantation in an adult patient with situs inversus totalis

    PubMed Central

    Yankol, Yücel; Mecit, Nesimi; Kanmaz, Turan; Acarlı, Koray; Kalayoğlu, Münci

    2015-01-01

    Situs inversus totalis (SIT) is a rare congenital anomaly, and liver transplantation (LT) in an adult SIT patient is extremely rare. Liver transplantation in a SIT patient is also technically challenging due to reversed anatomical structures. Here we present the case of an 18-year-old female with SIT in whom left lobe living donor LT was performed. The patient suffered from cirrhosis due to autoimmune hepatitis. The recipient and donor are doing well without complications 20 months after LT. Situs inversus totalis should not be considered a contraindication for LT. If possible, use of a living donor left lobe graft for LT is more feasible than a living donor right lobe graft. It is also technically easier than using deceased donor full-size liver graft in SIT patients who require liver transplantation. PMID:26668533

  3. Dextrocardia, situs inversus and severe mitral stenosis in a pregnant woman: successful closed commissurotomy.

    PubMed

    Said, S A; Veerbeek, A; van der Wieken, L R

    1991-07-01

    A 16-weeks' pregnant woman with situs inversus and dextrocardia underwent successful closed commissurotomy for severe mitral stenosis. The electrocardiogram revealed sinus rhythm with right axis deviation and progressive diminishing of QRS amplitude towards the left precordial leads. The chest X-ray showed dextrocardia with situs inversus. Doppler echocardiography depicted severe mitral stenosis; the mitral valve area increased from 0.9 cm2 pre-operatively to 1.8 cm2 post-operatively with mild increase of mitral regurgitation from grade I to II post-valvotomy. She also had associated mild functional tricuspid insufficiency and moderate pulmonary hypertension. No thrombo-embolic complications occurred intra- or post-operatively. There was no evidence of either clinical or Doppler restenosis. The course of pregnancy was uneventful. At 39 weeks a healthy baby was vaginally delivered. The patient is still free of cardiac symptoms.

  4. Angiomyolipoma in a Patient with Situs Inversus Totalis: Managing Two Rare Diseases

    PubMed Central

    Heaton, Nigel

    2016-01-01

    Hepatic angiomyolipoma is an extremely rare benign hamartomatous lesion. Situs inversus totalis is a genetic condition occurring in 0.01% of the population. Following the kidney, the liver is the second most common site of angiomyolipoma. No consensus on the treatment of hepatic angiomyolipoma has been reached. However, the majority of these tumours are managed conservatively. Situs inversus totalis presents difficulties for procedures and is most commonly an incidental finding. These two conditions have not previously been reported and no genetic link has been established between them. This paper reports the association of both conditions in a 74-year-old female, reviews the literature, and presents CT imaging of the case. PMID:27525134

  5. Tetralogy of Fallot and pheochromocytoma in a situs inversus totalis: An unusual association

    PubMed Central

    Tapia-Orihuela, Rubén Kevin Arnold; Huaringa-Marcelo, Jorge; Loja-Oropeza, David

    2016-01-01

    Introduction: Situs inversus totalis is an uncommon anomaly which exist a complete transposition of organs and it’s occasionally associated with congenital heart diseases, such as tetralogy of fallot. Pheochromocytoma is a rare neuroendocrine tumor with an annual incidence of 2-8 cases per million people and for years has been studied its relationship with the hypoxic pathway. Case Report: A 29 year old male with a history of tetralogy of fallot corrected at 10 years and situs inversus totalis. He was admitted to hospital with a progressive story of four months of constipation, palpitations, headache, dyspnea and sweating. Physical examination revealed a thinned man with peripheral cyanosis, clubbing and signs of decompensated congestive heart failure as hepatomegaly, legs edema, multifocal systodiastolic murmurs, abdominal distension and jugular venous distention. The echocardiogram shows severe right ventricular dysfunction and severe pulmonary hypertension. Furthermore, abdominal computed tomography shows right adrenal mass. Elevated metanephrines and catecholamines confirmed the diagnosis of pheochromocytoma. Surgical removal is decided and preoperative management begins with alpha-adrenergic blockade, however the patient had a hemodynamic decompensation with an unfavorable evolution. Discussion: In conclusion, there are few reports of cyanotic congenital heart disease with pheochromocytoma. Several studies show a significant association between both of them due to chronic hypoxia leads sustained hyperresponsiveness in adrenal medulla and it would cause the tumor. Special preoperative management of pheochromocytoma is recommended when there underlying heart disease and congestive heart failure. We present the first international report of tetralogy of fallot and pheochromocytoma in a patient with situs inversus totalis. PMID:27777699

  6. Transfemoral aortic valve implantation for severe aortic stenosis in a patient with dextrocardia situs inversus.

    PubMed

    Good, Richard I S; Morgan, Kenneth P; Brydie, Alan; Beydoun, Hussein K; Nadeem, S Najaf

    2014-09-01

    Transcatheter aortic valve implantation (TAVR) has grown rapidly over the past 10 years. Device and delivery catheter systems have evolved to facilitate the procedure and reduce the risk of associated complications, including those related to vascular access. It is important to understand the utility of the TAVR equipment in patients with more challenging anatomy to select the most appropriate technique for this complex procedure. We report the first case, to our knowledge, of a patient with dextrocardia situs inversus and previous coronary artery bypass grafting who underwent TAVR from the femoral route using the Edwards SAPIEN XT Novaflex+ Transfemoral System (Edwards Lifesciences, Irvine, CA).

  7. Transaortic Fallot repair in a grown-up patient: advantages in a situs inversus setting.

    PubMed

    Gil-Jaurena, Juan-Miguel; Cano, Joaquín; Cuenca, Victorio

    2012-10-01

    We present the case studies of two adult patients with tetralogy of Fallot who were scheduled for surgery. After addressing the right ventricular outflow tract obstruction, the aorta was opened and the ventricular septal defect was approached in a straightforward manner as it was located just under the overriding aortic valve. The second patient presented with was a situs inversus, dextroapex Fallot. In this setting, the aortic approach simplified the repair expeditiously. After 2 years, both patients are in New York Heart Association class I, with no residual ventricular septal defect, no aortic regurgitation, and complete relief of right ventricular outflow tract obstruction.

  8. MURCS association with situs inversus totalis: Expanding the spectrum or a novel disorder.

    PubMed

    Ekbote, Alka V; Kamath, Mohan S; Danda, Sumita

    2014-09-01

    We are reporting a female patient with a MURCS association (Müllerian duct aplasia, unilateral renal agenesis, cervico-thoracic somite fusion defects), situs inversus totalis, short stature with normal development and intelligence. We are presenting the comparison with two other patients published with similar finding. Our patient is distinct in having all the characteristic features and represents the severe spectrum of this disorder. We present our argument favoring this to be a monogenic syndrome distinct from the other two entities and probably a ciliopathy. PMID:27625874

  9. MURCS association with situs inversus totalis: Expanding the spectrum or a novel disorder

    PubMed Central

    Ekbote, Alka V.; Kamath, Mohan S.; Danda, Sumita

    2014-01-01

    We are reporting a female patient with a MURCS association (Müllerian duct aplasia, unilateral renal agenesis, cervico-thoracic somite fusion defects), situs inversus totalis, short stature with normal development and intelligence. We are presenting the comparison with two other patients published with similar finding. Our patient is distinct in having all the characteristic features and represents the severe spectrum of this disorder. We present our argument favoring this to be a monogenic syndrome distinct from the other two entities and probably a ciliopathy.

  10. Percutaneous Mitral Valvotomy in a Case of Situs Inversus Totalis and Juvenile Rheumatic Critical Mitral Stenosis: Case Report

    PubMed Central

    Sinha, Santosh Kumar; Thakur, Ramesh; Jha, Mukesh Jitendra; Sayal, Karandeep Singh; Sachan, Mohit; Krishna, Vinay; Kumar, Ashutosh; Mishra, Vikas; Varma, Chandra Mohan

    2016-01-01

    Situs inversus totalis is a rare congenital disorder where the heart being a mirror image is situated on the right side of the body. Distorted cardiac anatomy makes fluoroscopy-guided percutaneous mitral valvotomy (PMV) technically challenging and there are only few reports of PMV in situs inversus totalis. Here we report a case where PMV was successfully done for situs inversus totalis with rare coincidence of juvenile rheumatic severe mitral stenosis in a 12-year-old boy with a few modifications of standard Inoue technique. He had exertional dyspnea of NYHA class III with initial mitral valve area (MVA) of 0.6 cm2 and severe pulmonary arterial hypertension with features suitable for PMV. Femoral vein was accessed from the left side to align the septal puncture needle and balloon to facilitate left ventricular entry. Septal descent and puncture by Brockenbrough needle was performed in the right anterior oblique view with the needle facing 5 o’clock position. Accura balloon was negotiated across mitral valve in left anterior oblique and procedure was successfully executed. Echocardiography showed a well-divided anterior commissure with an MVA of 2.0 cm2 and mild mitral regurgitation. In summary, PMV is safe and feasible in the rare patient with situs inversus totalis with few modifications of the Inoue technique. PMID:26985259

  11. Laterality Defects Other Than Situs Inversus Totalis in Primary Ciliary Dyskinesia

    PubMed Central

    Davis, Stephanie D.; Ferkol, Thomas; Dell, Sharon D.; Rosenfeld, Margaret; Olivier, Kenneth N.; Sagel, Scott D.; Milla, Carlos; Zariwala, Maimoona A.; Wolf, Whitney; Carson, Johnny L.; Hazucha, Milan J.; Burns, Kimberlie; Robinson, Blair; Knowles, Michael R.; Leigh, Margaret W.

    2014-01-01

    BACKGROUND: Motile cilia dysfunction causes primary ciliary dyskinesia (PCD), situs inversus totalis (SI), and a spectrum of laterality defects, yet the prevalence of laterality defects other than SI in PCD has not been prospectively studied. METHODS: In this prospective study, participants with suspected PCD were referred to our multisite consortium. We measured nasal nitric oxide (nNO) level, examined cilia with electron microscopy, and analyzed PCD-causing gene mutations. Situs was classified as (1) situs solitus (SS), (2) SI, or (3) situs ambiguus (SA), including heterotaxy. Participants with hallmark electron microscopic defects, biallelic gene mutations, or both were considered to have classic PCD. RESULTS: Of 767 participants (median age, 8.1 years, range, 0.1-58 years), classic PCD was defined in 305, including 143 (46.9%), 125 (41.0%), and 37 (12.1%) with SS, SI, and SA, respectively. A spectrum of laterality defects was identified with classic PCD, including 2.6% and 2.3% with SA plus complex or simple cardiac defects, respectively; 4.6% with SA but no cardiac defect; and 2.6% with an isolated possible laterality defect. Participants with SA and classic PCD had a higher prevalence of PCD-associated respiratory symptoms vs SA control participants (year-round wet cough, P < .001; year-round nasal congestion, P = .015; neonatal respiratory distress, P = .009; digital clubbing, P = .021) and lower nNO levels (median, 12 nL/min vs 252 nL/min; P < .001). CONCLUSIONS: At least 12.1% of patients with classic PCD have SA and laterality defects ranging from classic heterotaxy to subtle laterality defects. Specific clinical features of PCD and low nNO levels help to identify PCD in patients with laterality defects. TRIAL REGISTRY: ClinicalTrials.gov; No.: NCT00323167; URL: www.clinicaltrials.gov PMID:24577564

  12. [Dextrocardia in situs inversus totalis with obstructive coronary disease. Its treatment by coronary angioplasty by the brachial approach].

    PubMed

    da Silva, M J; Arie, S; Garcia, D P; Bellotti, G; Pileggi, F

    1992-10-01

    Dextrocardia in "situs inversus totalis" with obstructive coronary disease is a rare clinical situation, with few cases treated by coronary angioplasty using the femoral approach being reported. In this report we describe the case of a 61-year-old male patient who underwent successful dilatation of two arteries by the brachial approach. We discuss technical aspects related to the procedure, which may be easily performed when proper equipment is available.

  13. Mutation of HES7 in a large extended family with spondylocostal dysostosis and dextrocardia with situs inversus.

    PubMed

    Sparrow, Duncan B; Faqeih, Eissa Ali; Sallout, Bahauddin; Alswaid, Abdulrahman; Ababneh, Faroug; Al-Sayed, Moeenaldeen; Rukban, Hadeel; Eyaid, Wafaa M; Kageyama, Ryoichiro; Ellard, Sian; Turnpenny, Peter D; Dunwoodie, Sally L

    2013-09-01

    Spondylocostal dysotosis (SCD) is a rare developmental congenital abnormality of the axial skeleton. Mutation of genes in the Notch signaling pathway cause SCD types 1-5. Dextrocardia with situs inversus is a rare congenital malformation in which the thoracic and abdominal organs are mirror images of normal. Such laterality defects are associated with gene mutations in the Nodal signaling pathway or cilia assembly or function. We investigated two distantly related individuals with a rare combination of severe segmental defects of the vertebrae (SDV) and dextrocardia with situs inversus. We found that both individuals were homozygous for the same mutation in HES7, and that this mutation caused a significant reduction of HES7 protein function; HES7 mutation causes SCD4. Two other individuals with SDV from two unrelated families were found to be homozygous for the same mutation. Interestingly, although the penetrance of the vertebral defects was complete, only 3/7 had dextrocardia with situs inversus, suggesting randomization of left-right patterning. Two of the affected individuals presented with neural tube malformations including myelomeningocele, spina bifida occulta and/or Chiari II malformation. Such neural tube phenotypes are shared with the originally identified SCD4 patient, but have not been reported in the other forms of SCD. In conclusion, it appears that mutation of HES7 is uniquely associated with defects in vertebral, heart and neural tube formation, and this observation will help provide a discriminatory diagnostic guide in patients with SCD, as well as inform molecular genetic testing.

  14. Therapeutic endoscopic retrograde cholangiopancreatography in a patient with situs inversus viscerum

    PubMed Central

    Hu, Yi; Zeng, Hao; Pan, Xiao-Lin; Lv, Nong-Hua; Liu, Zhi-Jian; Hu, Yang

    2015-01-01

    Situs inversus viscerum (SIV) is a rare congenital condition characterized by complete transposition of all viscera. This anatomical pathology makes endoscopic retrograde cholangiopancreatography (ERCP) technically difficult. We report a new case of a 70-year-old Chinese male with total SIV who had obstructive jaundice. Magnetic resonance cholangiopancreatography demonstrated a number of stones in the gallbladder and common bile duct (CBD). Therapeutic ERCP was performed to relieve biliary obstruction and remove the CBD stones. This procedure started with the patient in a supine position and the endoscopist at the left side of the table. When the papilla was maintained, the patient was repositioned to a prone position and standard endoscopic sphincterotomy and endoscopic papillary balloon dilatation procedures were conducted. ERCP was performed successfully and relevant complications did not occur in this patient. We also present a review of the literature published between 1985 and 2014 in the PubMed and EMBASE databases. There were eight published cases during this period, with one each from America, Finland, India, Italy, South Korea and Pakistan, and two from Spain. Our case is the first reported in China. PMID:25987802

  15. Laparoscopic Sigmoidectomy for a Patient With Situs Inversus Totalis: Effect of Changing Operator Position

    PubMed Central

    Yaegashi, Mizunori; Kimura, Toshimoto; Sakamoto, Takashi; Sato, Tadao; Kawasaki, Yuichiro; Otsuka, Koki; Wakabayashi, Go

    2015-01-01

    Situs inversus totalis (SIT) is a rare congenital condition in which the abdominal and thoracic organs are on the opposite sides to their normal anatomic positions. Reports of laparoscopic surgery for colorectal cancer with SIT are very few. Due to the mirror-image transposition of organs and vascular abnormalities, laparoscopic surgery for patients with SIT is technically complicated. Therefore, it has been reported as easier for left-handed surgeons. This report presents that operative procedures can be conducted as usual by changing the positions of the operator and assistants, even if the operator is right-handed. A 71-year-old woman visited our hospital with a 2-month history of hematochezia. Colonoscopy revealed an ulcerative tumor in the sigmoid colon and biopsy confirmed well-differentiated adenocarcinoma. Laparoscopic sigmoidectomy radical lymphadenectomy was performed. The operating time was 189 minutes and blood loss was 13 mL. The patient was discharged on postoperative day 7, without any complications. We report that complicated surgical procedures for patients with SIT can be simplified by changing viewpoints. Due to the altered anatomy in SIT, the positions of the operator and assistants are very important. Location of the pelvis is almost the same as in orthotopic patients, by moving the operator from the left side to the right side of the patient. Changing the position of the operator to the right side seems to be effective for patients with SIT during pelvic procedures. PMID:25875545

  16. Single-Incision Multi-Port Appendectomy for a Patient with Situs Inversus Totalis

    PubMed Central

    Rajkumar, J. S.; Syed, Akbar; Anirudh, J.R.; Kishor, C.M.; Ganesh, Deepa

    2016-01-01

    Situs inversus totalis (SIT) is a rare autosomal recessive condition involving the complete lateral transposition of the organs. When individuals with this condition suffer from appendicitis, associated pain and symptoms are usually present on the left side, resulting in diagnostic difficulties. Moreover, the laparoscopic removal of the left-sided appendix may pose practical problems during surgery. Removal of an inflamed appendix is generally performed using a multiple-port laparoscopy. We report a 22-year-old male who presented to the Lifeline Institute of Minimal Access Surgery in Chennai, India, in April 2015 with pain in the left iliac fossa. Chest X-rays and ultrasonography confirmed SIT with an acutely inflamed appendix on the left side. The patient underwent a single-incision multi-port laparoscopic appendectomy with a successful outcome. To the best of the authors’ knowledge, this is the first report in the literature of a single-incision multi-port appendectomy in a patient with SIT. PMID:27226919

  17. Off-Pump Triple Coronary Artery Bypass Grafting in a Patient with Situs Inversus Totalis: Case Presentation and a Brief Review of the Brazilian and the International Experiences

    PubMed Central

    Karigyo, Carlos Junior Toshiyuki; Batalini, Felipe; Murakami, Alexandre Noboru; Teruya, Rogério Toshio; Gregori Júnior, Francisco

    2016-01-01

    A 76-year-old man with situs inversus totalis underwent a successful off-pump three-vessel coronary artery bypass surgery. The postoperative course was uneventful, and the patient was discharged 8 days later. At 9-month follow-up a coronary computed tomography angiography confirmed the viability of all of the grafts, and one year after the operation the patient remained asymptomatic. It comprises the fifth Brazilian case of a coronary surgery in a patient with situs inversus totalis and the first one of the country of a coronary artery bypass surgery without the use of the cardiopulmonary bypass in this condition. PMID:27556323

  18. Symptomatic sick sinus syndrome requiring permanent pacemaker implantation in a patient uwith mirror image dextrocardia with situs inversus and infertility.

    PubMed

    Kahali, Dhiman; Mandal, Saroj; Mandal, Debasmita; Ghose, Arijit; Kanjilal, Souvik

    2013-01-01

    Situs inversus with dextrocardia is a congenital condition in which the heart is a mirror image of the anatomically normal heart on the right side. A patient presented with the sick sinus syndrome accompanying mirror image dextrocardia which was associated with double superior vena cava and a left sided inferior vena cava A permanent transvenous demand pacemaker was inserted because of repeated episodes of dizziness and a single episode of syncope with ECG showing bradycardia with junctional escape rhythm. Precise knowledge of the venous system and the location of the apex of the right ventricle were necessary prior to permanent pacemaker implantation. Without such knowledge pacing may be technically challenging.

  19. Gastrectomy for gastric carcinoma with situs inversus totalis: case report and literature review

    PubMed Central

    Zhu, H; Yang, K; Hu, JK

    2015-01-01

    Background: Situs inversus totalis (SIT), a rare congenital anomaly, is characterized by a complete mirror image transposition of the thoracic and abdominal viscera. We report the case of a 66-year-old woman with SIT who was diagnosed with gastric antral carcinoma. Curative distal gastrectomy with Billroth-I anastomosis was performed. Description of the case: A 66-year-old woman visited our outpatient department complaining of abdominal pain in the left upper quadrant for about one year. Physical examination revealed that the apex beat was in the right fifth intercostal space, just at the midclavicular line while a soft systolic murmur was audible at the upper right sternal border. The abdominal examination was unremarkable. The preoperative diagnosis was confirmed by gastroscopy and biopsy. Preoperative echocardiogram revealed the presence of dextrocardia and atrial septal defect. Preoperative contrasted computed tomography showed a complete right-left reversal of the thoracic and abdominal organs and thickened wall of gastric antrum without distant metastasis. Laparotomy through a midline incision confirmed the complete mirror-image transposition of the abdominal visceral organs and a 4-cm tumor with serosal involvement at the gastric antrum. Curative distal gastrectomy with D2 lymphadenectomy and Billroth-I anastomosis was performed. The patient had a rapid recovery and was discharged without any complications. The final staging of this case was pT4aN1M0, stage IIIa and she received chemotherapy with the SOX regimen for three cycles. Fifteen months after the operation, the patient is alive without any signs of recurrence. Conclusions: The incidence of gastric cancer with SIT is very rare. Appropriate diagnostic modalities are very helpful for the diagnosis and preoperative planning. Gastrectomy with D2 lymphadenectomy in patients with SIT can be performed successfully with sufficient preoperative evaluation, comprehensive knowledge of anatomy, and meticulous

  20. Assessment and comparison of left ventricular shear in normal and situs inversus totalis hearts by means of magnetic resonance tagging.

    PubMed

    Rossi, Alessandro C; Pluijmert, Marieke; Bovendeerd, Peter H M; Kroon, Wilco; Arts, Theo; Delhaas, Tammo

    2015-03-01

    Situs inversus totalis (SIT) is characterized by complete mirroring of gross cardiac anatomy and position combined with an incompletely mirrored myofiber arrangement, being normal at the apex but inverted at the base of the left ventricle (LV). This study relates myocardial structure to mechanical function by analyzing and comparing myocardial deformation patterns of normal and SIT subjects, focusing especially on circumferential-radial shear. In nine control and nine SIT normotensive human subjects, myocardial deformation was assessed from magnetic resonance tagging (MRT) image sequences of five LV short-axis slices. During ejection, no significant difference in either circumferential shortening (εcc) or its axial gradient (Δεcc) is found between corresponding LV levels in control and SIT hearts. Circumferential-radial shear (εcr) has a clear linear trend from apex-to-base in controls, while in SIT it hovers close to zero at all levels. Torsion as well as axial change in εcr (Δεcr) is as in controls in apical sections of SIT hearts but deviates significantly towards the base, changing sign close to the LV equator. Interindividual variability in torsion and Δεcr values is higher in SIT than in controls. Apex-to-base trends of torsion and Δεcr in SIT, changing sign near the LV equator, further substantiate a structural transition in myofiber arrangement close to the LV equator itself. Invariance of εcc and Δεcc patterns between controls and SIT subjects shows that normal LV pump function is achieved in SIT despite partial mirroring of myocardial structure leading to torsional and shear patterns that are far from normality.

  1. Situs inversus totalis and a novel ZIC3 mutation in a family with X-linked heterotaxy.

    PubMed

    D'Alessandro, Lisa C A; Casey, Brett; Siu, Victoria Mok

    2013-01-01

    Disorders of laterality consist of a complex set of malformations resulting from failure to establish normal asymmetry along the left-right axis, and include both heterotaxy and situs inversus totalis. Zinc fingers in cerebellum 3 (ZIC3) was the first gene to be definitively associated with heterotaxy syndromes in humans (OMIM #306955), with 13 mutations previously described in both familial and sporadic cases. We now report the clinical and molecular characterization of a five-generation family originally reported in 1974 as having X-linked dextrocardia. Longitudinal follow-up revealed that this family has X-linked heterotaxy due to a missense mutation, c.1048A>G(R350G), in the third zinc finger domain of ZIC3. The pedigree demonstrates the first reported case of situs inversus totalis associated with a ZIC3 mutation in a male and the second reported case of incomplete penetrance in an unaffected transmitting male, as well as a wide range of phenotypes of varying severity. Several affected members also exhibit renal and hindgut malformations, consistent with previously reported secondary features in ZIC3 mutations. The spectrum of features in this family emphasizes the importance of thorough molecular and imaging studies in both sporadic and familial cases of heterotaxy to ensure accurate prenatal diagnosis and recurrence risk counseling.

  2. [Atherosclerotic ischemic cardiopathy in patients with dextrocardia in situs viscerum inversus].

    PubMed

    Astudillo, R; Escudero, X; Farell, J; Ariza, H; González Carmona, V M; Tello, R

    1993-01-01

    We describe the incidence, clinical, radiologic, electrocardiographic, echocardiographic and angiographic findings of two cases with dextrocardia in situ viscerum inversus with ischaemic heart disease. The first patient had coronary artery saphenous bypass graft and is currently asymptomatic with a negative maximal stress test. The other patient with diabetes mellitus and unfavorable coronary anatomy was not operated and is currently with stable angina on class II of the NYHA. The electrocardiographic, echocardiographic and angiographic strategies are commented.

  3. Situs Inversus Totalis (SIT) with Hepatocellular Carcinoma (HCC): A Rare Case Report and Review of 12 Other Cases.

    PubMed

    Patel, Rajan B; Gupta, Natvar R; Vasava, Nitin C; Khambholja, Janak R; Chauhan, Sanjay; Desai, Amit

    2013-12-01

    Hepatocellular carcinoma (HCC) is the seventh-most common malignancy in males and ninth in females with incidence of one million new cases every year. Situs inversus totalis (SIT) is a rare congenital condition, in which there is a mirror-image transposition of both the abdominal and thoracic viscera. There are very few reported cases of HCC developing in people with SIT. In this review, we present a new case of HCC with SIT, and a review of literatures published between 1983 and 2011 on it. The literatures in English were searched through PubMed and Google Scholar, while those in Japanese language were accessed through J-EAST and translated in English with the help of Google translator on 22 April 2012. There are 6 English and 6 Japanese literatures showing 12 published cases, of which 10 cases were from Japan, 1 from Taiwan and 1 from China. Our case is probably the first case in the world beyond these regions. The articles containing adequate information, such as patient age and sex, investigations, diagnosis, type of congenital anomalies and methods of surgery, were reviewed. On reviewing the literature, we observed that clinical manifestations, laboratory findings and etiology correlate well with HCC, while anomalous hepatic vascularity correlates well with SIT. The reason for high incidence of HCC with SIT in Japan is not well correlated, but may be explained by higher incidence of SIT. All varieties of hepatic resection were feasible in cases of SIT. PMID:24465096

  4. Modified Senning Procedure for Correction of Atrioventricular Discordance With Total Anomalous Pulmonary Venous Return, Atrial Situs Inversus, Dextrocardia, and Bilateral Superior Venae Cavae.

    PubMed

    Sebastian, Vinod A; Guleserian, Kristine J; Juraszek, Amy; Kane, Colin; Hamzeh, Rabih; Forbess, Joseph M

    2015-10-01

    The Senning and Mustard baffles remain important techniques for the treatment of congenitally corrected transposition (cc-TGA), isolated ventricular inversion, and D-transposition of the great arteries with delayed presentation. We describe the treatment of an 8-month old infant with atrioventricular discordance, ventriculoarterial concordance, and dextrocardia with atrial situs inversus. A modified Senning procedure was performed through the "left-sided" atrium. Modifications of the Senning and Mustard baffles remain important tools in the treatment of rare conditions like isolated ventricular inversion.

  5. Spontaneous gallbladder perforation in a patient of situs inversus totalis, misdiagnosed as perforation peritonitis due to gas under the right dome of the diaphragm.

    PubMed

    Kumar, Sanjeev; Kumar, Shailendra; Kumar, Suresh; Gautam, Shefali

    2015-06-29

    Acute biliary tract disease is a common condition in adults. Apart from bile duct perforation, spontaneous perforation of the gallbladder itself is very rare in all age groups; to date, all recorded cases are secondary to coexistent disease. We present the case report of a 60-year-old adult having an idiopathic gallbladder perforation. In our case, an unusual presentation was situs inversus totalis and fundal gas shadow was considered as free air under the right dome of the diaphragm by mistake. The patient underwent laparotomy and emergency cholecystectomy was performed in the perforated gallbladder. To date, no case has been described in the literature.

  6. Hand-assisted robotic right donor nephrectomy in patient with total sinus inversus: A case report

    PubMed Central

    Gonzalez-Heredia, Raquel; Garcia-Roca, Raquel; Benedetti, Enrico

    2016-01-01

    Total situs inversus” is an infrequent congenital condition. The robot has been already proved as a safe and attractive approach for living donor neprectomies. We report here the first right donor nephrectomy in a patient with total sinus inversus that is performed using the Da Vinci platform. PMID:27085108

  7. Occupational Situs and the Agricultural Labor Market.

    ERIC Educational Resources Information Center

    Lyson, Thomas A.

    Agricultural situs can be applied to the analysis, description, and examination of career lines, occupational families, and opportunity structures in the agricultural sector. A proposed situs classification of three categories, or parallel agricultural career ladders was examined in terms of production agriculture, agribusiness, and agricultural…

  8. Shone's complex with dextrocardia and situs inversus totalis: a case report.

    PubMed

    Ekici, Berkay; Erkan, Aycan Fahri; Sökmen, Yeliz; Tüfekçioğlu, Omaç

    2012-10-01

    Parachute mitral valve complex is an unusual congenital anomaly that has been described by Shone et al. It is characterized by a parachute deformity of the mitral valve associated with additional forms of left heart anomalies, such as aortic valvular stenosis and coarctation of the aorta. A 21-year-old female who was referred to our department because of progressive dyspnea on effort and at rest and minimal cyanosis is presented in this case report. On cardiac auscultation, the patient had a grade III/VI pansystolic murmur best heard at the lower left sternal border. The chest X-ray demonstrated dextrocardia and mild cardiomegaly. Echocardiographic evaluation revealed Shone's complex, including parachute mitral valve anomaly.

  9. [Implantation of a biventricular ICD in a patient with dextrocardia with situs inversus].

    PubMed

    Vurgun, Veysel Kutay; Gerede, Menekşe; Altın, Ali Timuçin; Candemir, Başar; Akyürek, Ömer

    2015-01-01

    In order to reduce sudden cardiac death and heart failure symptoms, biventricular implantable cardioverter defibrillator (ICD) implantation is a treatment method commonly used in selected patients with cardiomyopathy. The frequency of dextrocardia in congenital heart defects is approximately 0.4/10000. In this group, the frequency of cardiomyopathy development is rare. In this case report we present a patient with dextrocardia undergoing implantation of biventricular ICD.

  10. Conventions and workflows for using Situs

    SciTech Connect

    Wriggers, Willy

    2012-04-01

    Recent developments of the Situs software suite for multi-scale modeling are reviewed. Typical workflows and conventions encountered during processing of biophysical data from electron microscopy, tomography or small-angle X-ray scattering are described. Situs is a modular program package for the multi-scale modeling of atomic resolution structures and low-resolution biophysical data from electron microscopy, tomography or small-angle X-ray scattering. This article provides an overview of recent developments in the Situs package, with an emphasis on workflows and conventions that are important for practical applications. The modular design of the programs facilitates scripting in the bash shell that allows specific programs to be combined in creative ways that go beyond the original intent of the developers. Several scripting-enabled functionalities, such as flexible transformations of data type, the use of symmetry constraints or the creation of two-dimensional projection images, are described. The processing of low-resolution biophysical maps in such workflows follows not only first principles but often relies on implicit conventions. Situs conventions related to map formats, resolution, correlation functions and feature detection are reviewed and summarized. The compatibility of the Situs workflow with CCP4 conventions and programs is discussed.

  11. Unilateral anterior persistent fetal vasculature in a child with blepharophimosis-ptosis-epicanthus inversus syndrome: A surgical challenge

    PubMed Central

    Kemmanu, Vasudha; Rathod, Pragnya; Anaspure, Hemant; Yadav, Naresh K

    2016-01-01

    Blepharophimosis-ptosis-epicanthus inversus syndrome (BPES) is a rare autosomal dominant genetic disease. It is clinically characterized by four major features; blepharophimosis, ptosis, epicanthus inversus, and telecanthus. We report a case of a 1-year-old female with BPES with unilateral anterior persistent fetal vasculature (PFV). On examination, she was found to have all the clinical features of BPES, along with calcified and partially absorbed cataract with elongated ciliary processes in her left eye. B-scan of left eye showed attached retina with no evidence of posterior PFV. Systemic examination was normal. She underwent cataract surgery with primary posterior capsulotomy with intraocular lens implantation under general anesthesia. Literature search did not reveal any previous reports of unilateral anterior PFV and BPES. The clinical features, other associations, and the difficulties in the surgical management of this condition are discussed. PMID:27488160

  12. Isolated dextrocardia with situs solitus (dextroversion).

    PubMed

    Solzbach, Ulrich; Beuter, Matthias; Hartig, Bernd; Haas, Helmut

    2010-05-01

    Dextrocardia refers to the position of the heart in the right side of the chest. It is a rare clinical phenomenon with a reported incidence of 1 in 5,000-30,000. Although there is a variation in terminology and classification with regard to dextrocardia, the condition of right-sided heart with situs solitus is most commonly referred to as dextroversion. The authors report the case of dextroversion in a patient who presented in their hospital for evaluation of chest pain on exertion. Cardiac catheterization produced unfamiliar angiographic images, but there was no severe technical problem during coronary angiography. Apart from dextroversion, no further cardiac or noncardiac anomaly was found.

  13. Multiple Renal Cyst Development but Not Situs Abnormalities in Transgenic RNAi Mice against Inv::GFP Rescue Gene

    PubMed Central

    Kamijho, Yuki; Shiozaki, Yayoi; Sakurai, Eiki; Hanaoka, Kazunori; Watanabe, Daisuke

    2014-01-01

    In this study we generated RNA interference (RNAi)-mediated gene knockdown transgenic mice (transgenic RNAi mice) against the functional Inv gene. Inv mutant mice show consistently reversed internal organs (situs inversus), multiple renal cysts and neonatal lethality. The Inv::GFP-rescue mice, which introduced the Inv::GFP fusion gene, can rescue inv mutant mice phenotypes. This indicates that the Inv::GFP gene is functional in vivo. To analyze the physiological functions of the Inv gene, and to demonstrate the availability of transgenic RNAi mice, we introduced a short hairpin RNA expression vector against GFP mRNA into Inv::GFP-rescue mice and analyzed the gene silencing effects and Inv functions by examining phenotypes. Transgenic RNAi mice with the Inv::GFP-rescue gene (Inv-KD mice) down-regulated Inv::GFP fusion protein and showed hypomorphic phenotypes of inv mutant mice, such as renal cyst development, but not situs abnormalities or postnatal lethality. This indicates that shRNAi-mediated gene silencing systems that target the tag sequence of the fusion gene work properly in vivo, and suggests that a relatively high level of Inv protein is required for kidney development in contrast to left/right axis determination. Inv::GFP protein was significantly down-regulated in the germ cells of Inv-KD mice testis compared with somatic cells, suggesting the existence of a testicular germ cell-specific enhanced RNAi system that regulates germ cell development. The Inv-KD mouse is useful for studying Inv gene functions in adult tissue that are unable to be analyzed in inv mutant mice showing postnatal lethality. In addition, the shRNA-based gene silencing system against the tag sequence of the fusion gene can be utilized as a new technique to regulate gene expression in either in vitro or in vivo experiments. PMID:24586938

  14. [Primary hydatid cyst of the adrenal gland in a patient with situs inversus. A one-case report].

    PubMed

    Baraket, O; Zribi, R; Berriche, A; Chokki, A

    2010-12-01

    Primary hydatid cyst of the adrenal gland remains an exceptional localization. The adrenal gland is an uncommon site even in our country in which echinococcal disease is endemic. We report the case of a 38-year-old woman who consulted for left back pain. The CT scan showed a cystic mass in the left retroperitoneal area with a calcified wall. The patient underwent surgery which confirmed a diagnosis of hydatid cyst of the left adrenal gland. The surgical treatment consisted on a total resection of the cyst, without rupture of the cystic wall and preserving the gland. The diagnosis was confirmed on macroscopic and histological examination of the resected piece. The postoperative course was uneventful. No recurrence had occurred after 36 months of follow-up.

  15. Incidental Phaeochromocytoma on Staging PET-CT in a Patient with a Sigmoid Tumour and Situs Inversalis Totalis

    PubMed Central

    Boland, M. R.; Lowery, A. J.; Walsh, S.; Beddy, D.; Prichard, R. S.; O'Shea, D.; Skehan, S. J.; McDermott, E. W.

    2014-01-01

    An adrenal “incidentaloma” is defined as an unexpected finding on radiological imaging performed for unrelated indications. Improvements in radiological technology have seen a dramatic increase in this phenomenon. We report the unique case of a 60-year-old female presenting with a 6-month history of abdominal pain, altered bowel habit, and rectal bleeding. Her past medical history included situs inversus totalis and a patent ductus arteriosus. Colonoscopy revealed an ulcerated tumour in her sigmoid colon. Staging PET-CT confirmed a sigmoid tumour and also identified a large heterogenous enhancing FDG-avid right adrenal mass. Biochemical testing/MIBG imaging confirmed a right adrenal phaeochromocytoma. Hypertension was controlled and excision was performed via a transperitoneal laparoscopic adrenalectomy, in the left lateral decubitus position. Uniquely, liver retraction was not required due to its position in the left hypochondrium. Histology confirmed a benign 46 mm phaeochromocytoma. Subsequent uncomplicated sigmoid colectomy/right salpingo-oophorectomy for a locally advanced colonic tumour was performed with adjuvant chemotherapy. This case highlights the importance of accurately identifying functioning adrenal tumours before elective surgery as undiagnosed phaeochromocytomas carry significant intraoperative morbidity/mortality. Right adrenalectomy was made easier in this patient by the liver's unique position. Uncomplicated colorectal resection was made possible by combined preoperative functional/anatomical imaging. PMID:25110602

  16. Hypoplastic left heart syndrome with dextrocardia and situs solitus.

    PubMed

    Szczechowicz, Marcin; Januszewska, Katarzyna; Jux, Christian; Malec, Edward

    2014-04-01

    Hypoplastic left heart syndrome with dextrocardia and situs solitus is a very rare condition. We describe a 3.5-year-old male child with this constellation who underwent multistage repair and a successful extracardiac Fontan operation in our hospital.

  17. Percutaneous closure of atrial septal defect with situs solitus and dextrocardia.

    PubMed

    Galal, Mohammed Omar; Khan, Muhammad Arif; El-Segaier, Milad

    2015-02-01

    Percutaneous closure of secundum atrial septal defect associated with situs solitus and dextrocardia has not been reported previously. We describe the technical difficulties encountered during transcatheter closure of a secundum atrial septal defect in a 19-month-old girl with situs solitus and dextrocardia.

  18. Blepharophimosis, ptosis, and epicanthus inversus syndrome: clinical and molecular analysis of a case.

    PubMed

    Mari, Francesca; Giachino, Daniela; Russo, Lucia; Pilia, Giuseppe; Ariani, Francesca; Scala, Elisa; Chiappe, Francesca; Sampieri, Katia; Caporossi, Aldo; Renieri, Alessandra; Lasorella, Giacomo

    2006-06-01

    Blepharophimosis-ptosis-epicanthus inversus syndrome (OMIM #U10100) is a rare autosomal-dominant disorder in which an eyelid malformation is associated (type I) or not (type H) with premature ovarian failure in the affected female. It is invariably characterized by 4 major features: (1) bilaterally shortened horizontal palpebral fissure (blepharophimosis); (2) severe impairment of the superior palpebral levator (ptosis); (3) a vertical skin fold arising from the lower eyelid, which inserts medially in the upper lid (epicanthus inversus) and (4) an increased inner can-thal distance with a normal outer canthal distance (telecanthus). The mutations causing this disorder are found in the FOXL2 gene, a forkhead transcription factor, located in 3q23. Although many patients with blepharophimosis-ptosis-epicanthus inversus syndrome have an affected parent, a conspicuous number of sporadic cases also have been reported. We describe here a sporadic case with a mutation in the FOXL2 gene that was well characterized both clinically and molecularly.

  19. Cardiovascular manifestations of heterotaxy and related situs abnormalities assessed with CT angiography

    PubMed Central

    Wolla, Christopher D.; Hlavacek, Anthony M.; Schoepf, U. Joseph; Bucher, Andreas M.; Chowdhury, Shahryar

    2014-01-01

    Heterotaxy and situs abnormalities describe an abnormal arrangement of visceral organs in the thoracoabdominal cavity across the normal left–right axis of the body. It is associated with a high occurrence of congenital heart and abdominal defects, including anomalous pulmonary venous connections, systemic venous abnormalities, asplenia, and intestinal malrotation. Without proper diagnosis and surgical intervention, the prognosis of patients with heterotaxy syndrome and associated congenital defects is extremely poor. Complex intracardiac and extracardiac lesions are common in heterotaxy and can be difficult to assess by echocardiography. CT angiography (CTA) is a useful tool in this setting to accurately assess intracardiac and extracardiac abnormalities in this population for medical or surgical management. The intention of this pictorial essay is to review the most common cardiovascular defects involved with heterotaxy syndrome in addition to emphasizing the utility of CTA in the identification and classification of anomalies seen in these patients. This review briefly defines most common terminology used in situs abnormalities as well as presents CT images and 3-dimensional reconstructions of common anomalies associated with situs abnormalities. In summary, this review should prepare radiologists and pediatric cardiologists to describe heterotaxy and situs abnormalities in addition to recognizing the utility of CTA in these patients. PMID:24331937

  20. Radionuclide angiocardiography in the clinical evaluation of cardiac malpositions in situs solitus in adults.

    PubMed

    Guit, G L; Kroon, H M; Chin, J G; Pauwels, E K; van Voorthuisen, A E

    1986-04-01

    A right-sided position of the heart in the chest in situs solitus is an abnormal feature easily discernible from a plain chest radiograph. This cardiac malposition may be due to cardiac displacement (dextroposition), which is usually a feature of lung disease, or a structural abnormality of the heart (dextrocardia). Because each condition has different clinical pathologic implications, it is important to distinguish them. Chest films, however, often provide no conclusive information. We performed radionuclide angiocardiography (RNA) in six adults with a cardiac malposition in situs solitus. It was found that morphologic data obtained from the serial images may distinguish dextroposition from dextrocardia. In addition, these images permitted us to diagnose congenitally corrected transposition, a cardiac anomaly which occurs with increased frequency in situs solitus with dextrocardia. Quantitative shunt detection performed during this procedure is helpful in the differential diagnosis of dextroposition and able to distinguish uncomplicated dextrocardia from dextrocardia associated with other cardiac abnormalities. RNA therefore is a valuable and easily performed method in the analysis of cardiac malpositions in adults.

  1. Using Sculptor and Situs for Simultaneous Assembly of Atomic Components into Low-Resolution Shapes

    PubMed Central

    Birmanns, Stefan; Rusu, Mirabela; Wriggers, Willy

    2011-01-01

    We describe an integrated software system called Sculptor that combines visualization capabilities with molecular modeling algorithms for the analysis of multi-scale data sets. Sculptor features extensive special purpose visualization techniques that are based on modern GPU programming and are capable of representing complex molecular assemblies in real-time. The integration of graphics and modeling offers several advantages. The user interface not only eases the usually steep learning curve of pure algorithmic techniques, but it also permits instant analysis and post-processing of results, as well as the integration of results from external software. Here, we implemented an interactive peak-selection strategy that enables the user to explore a preliminary score landscape generated by the colores tool of Situs. The interactive placement of components, one at a time, is advantageous for low-resolution or ambiguously shaped maps, which are sometimes difficult to interpret by the fully automatic peak selection of colores. For the subsequent refinement of the preliminary models resulting from both interactive and automatic peak selection, we have implemented a novel simultaneous multi-body docking in Sculptor and Situs that softly enforces shape complementarities between components using the normalization of the cross-correlation coefficient. The proposed techniques are freely available in Situs version 2.6 and Sculptor version 2.0. PMID:21078392

  2. How standard transesophageal echocardiography views change with dextrocardia.

    PubMed

    Raut, Monish S; Maheshwari, Arun; Shad, Sujay; Rachna, G

    2013-01-01

    Dextrocardia with situs inversus is a rare condition. Situs inversus with dextrocardia is also called as "situs inversus totalis". Transesophageal echocardiography (TEE) views in dextrocardia patient are not discussed in the literature. The cardiac position and the cardiac chambers are mirror image of the normal anatomy. Because of this positional change, certain TEE probe and multiplane angle manipulations are required to obtain the recommended views.

  3. Mitral valve replacement with preservation of subvalvular apparatus in a patient with familial dextrocardia and situs solitus.

    PubMed

    Khan, Junaid Fayyaz; Khan, Imran; Khan, Kamran

    2014-11-01

    Familial dextrocardia with situs solitus is extremely rare entity. Dextrocardia offers a difficult situation to surgeon. A different strategy for cannulation and approach to the left atrium has to be followed. Surgery in such settings has rarely been reported. We present the case of a patient with dextrocardia and situs solitus wherein a left sided approach was adopted for a better exposure of the valve. The patient had a rheumatic regurgitant mitral valve with ruptured chordae to anterior mitral leaflet. Since the valve was severely thickened, it was replaced rather than repaired. The left sided approach provided good exposure of the valve.

  4. Left-sided approach for mitral valve replacement in a case of dextrocardia with situs solitus.

    PubMed

    Kikon, Mhonchan; Kazmi, Aamir; Gupta, Anubhav; Grover, Vijay

    2013-11-01

    Mitral valve surgery in dextrocardia is technically challenging due to its anatomical malposition. Minor modifications are required in the surgical technique to counteract the problems during cannulation and exposure of the mitral valve. We report a case of a patient with dextrocardia, situs solitus, rheumatic heart disease, severe mitral regurgitation, moderate pulmonary artery hypertension, and severe left ventricular dysfunction who underwent mitral valve replacement using a two-stage right atrial cannulation with left-sided left atrial atriotomy, with the surgeon standing on the left side of the patient. Our approach for mitral valve surgery in this clinical setting is simple.

  5. An infant with large fontanelles, aplasia cutis congenita, tessier facial cleft, polydactyly inversus, and toe syndactyly: a previously undescribed syndrome?

    PubMed

    Jackson, Jessica; Delk, Paula; Farrow, Emily; Griffith, Christopher; Lah, Melissa; Weaver, David D

    2015-04-01

    We report on a 5-month-old female with large and widely spaced anterior and posterior fontanelles, aplasia cutis congenita, Tessier 3 oblique facial cleft, polydactyly, and syndactyly of toes. The polydactyly is unusual as an accessory finger is attached to the left fifth finger with mirrored, end-to-end fusion. We are naming this anomaly "polydactyly inversus." The infant appears to have a previously unreported syndrome of unknown cause.

  6. Situs ambiguus in a Brown Swiss cow with polysplenia: case report

    PubMed Central

    2013-01-01

    Background Laterality defects are rare in cattle and usually manifest as asplenia or polysplenia syndrome. These syndromes may be associated with situs ambiguus, which is a dislocation of some but not all internal organs. The objective of this report was to describe the clinical and post-mortem findings including the macroscopic and microscopic anatomy of selected organs in a cow with polysplenia and situs ambiguus. Case presentation A 3.5-year-old Brown Swiss cow was referred to the Department of Farm Animals, Vetsuisse Faculty, University of Zurich, because of poor appetite and recurrent indigestion. A diagnosis of situs ambiguus was based on the results of physical examination, ultrasonography, exploratory laparotomy and post-mortem examination. The latter revealed that the rumen was on the right side and lacked compartmentalisation. There were two spleens, one on the left (26.5 x 12.0 cm) and one on the right (20.5 x 5.5 cm), and the omasum was located craniolateral to the ruminoreticulum on the left. The abomasum was located on the right, although it had initially been displaced to the left. The three-lobed liver occupied the left and central cranioventral aspect of the abdominal cavity (cavum abdominis). Only the right and left hepatic veins (vena hepatica dextra and sinistra) drained into the thoracic segment of the caudal vena cava (vena cava caudalis), and histological changes in the liver were indicative of impaired haemodynamics. The mesojejunum was not fused with the mesentery of the spiral loop (ansa spiralis) of the ascending colon (colon ascendens). The latter was folded and the transverse colon (colon transversum) ran caudal to the cranial mesenteric artery (arteria mesenteria cranialis). Fibrotic constrictions were seen in the lumen of the caecum and proximal loop (ansa proximalis) of the ascending colon. Both kidneys were positioned retroperitoneally in a lumbar position. The lumbar segment of the caudal vena cava did not descend to the liver and

  7. A case of Kartagener syndrome with rhinolalia clausa

    PubMed Central

    Raoufi, Mohammed; Sator, Hicham; Lahma, Jawad; El Ayoubi, Ali; Nitassi, Sophia; Oujilal, Abdelilah; Benbouzid, Mohammed Anas; Essakalli, Leila; Elouazzani, Hanane; Rhorfi, Ismail Abderrahmane; Abid, Ahmed

    2016-01-01

    Kartagener syndrome is an autosomal recessive genetic ciliary disorder comprising of a classic triad of sinusitis, situs inversus and bronchiectasis. It's the one of primary ciliary dyskinesia disorders with manifestations present from childhood. Most patients of PCD have situs inversus. We present a case of 18 year-old women with recurrent lower and upper respiratory tracts infections, and rhinolalia clausa. PMID:27375831

  8. A case of Kartagener syndrome with rhinolalia clausa.

    PubMed

    Raoufi, Mohammed; Sator, Hicham; Lahma, Jawad; El Ayoubi, Ali; Nitassi, Sophia; Oujilal, Abdelilah; Benbouzid, Mohammed Anas; Essakalli, Leila; Elouazzani, Hanane; Rhorfi, Ismail Abderrahmane; Abid, Ahmed

    2016-01-01

    Kartagener syndrome is an autosomal recessive genetic ciliary disorder comprising of a classic triad of sinusitis, situs inversus and bronchiectasis. It's the one of primary ciliary dyskinesia disorders with manifestations present from childhood. Most patients of PCD have situs inversus. We present a case of 18 year-old women with recurrent lower and upper respiratory tracts infections, and rhinolalia clausa. PMID:27375831

  9. Isolated subpulmonic fibrous ring, mirror-image dextrocardia and situs solitus in a young lady unreported and a near miss.

    PubMed

    Yousif, Musaab; Elhassan, Nezar B; Ali, Sulafa K M; Ahmed, Yassir

    2013-12-01

    Congenital diseases causing obstruction of the right ventricular outflow tract (RVOT) are common, but the isolated subpulmonary membrane/ring is extremely rare and can be difficult to diagnose precisely, especially in adults. We report a case of surgically resected isolated subpulmonic fibrous ring in a lady with mirror-image dextrocardia and abdominal situs solitus that was misdiagnosed by echocardiography as a subaortic membrane.

  10. Use of high kilovoltage filtered beam radiographs for detection of bronchial situs in infants and young children.

    PubMed Central

    Deanfield, J E; Leanage, R; Stroobant, J; Chrispin, A R; Taylor, J F; Macartney, F J

    1980-01-01

    Determination of atrial situs is of cardinal importance in the analysis of complex congenital heart lesions, and is best predicted from bronchial situs. Previous methods for assessing bronchial morphology, however, are unsuited to the very young patient. To assess bronchial morphology, 100 consecutive patients under 18 months of age (medium 57.5 days) with suspected congenital heart disease were studied by high kilovoltage filtered beam radiographs, before cardiac catheterisation. This low radiation dose technique clearly defined bronchial anatomy in 95 patients. The lengths of the left and right main bronchi were compared and 10 cases (10%) had a ratio less than 1.5 suggesting bronchial isomerism. Discriminant function analysis based on tracheal width and bronchial length enabled clear distinction of right from left bronchi. Four patients had bilateral right and six had bilateral left bronchi. Four of these 10 cases died and had necropsy confirmation of the radiological diagnosis. Practical prediction about cardiac anatomy, particularly the systemic and pulmonary venous return, may be made when bronchial morphology is known. Images PMID:7437200

  11. ANKS6 is the critical activator of NEK8 kinase in embryonic situs determination and organ patterning.

    PubMed

    Czarnecki, Peter G; Gabriel, George C; Manning, Danielle K; Sergeev, Mikhail; Lemke, Kristi; Klena, Nikolai T; Liu, Xiaoqin; Chen, Yu; Li, You; San Agustin, Jovenal T; Garnaas, Maija K; Francis, Richard J; Tobita, Kimimasa; Goessling, Wolfram; Pazour, Gregory J; Lo, Cecilia W; Beier, David R; Shah, Jagesh V

    2015-01-01

    The ciliary kinase NEK8 plays a critical role in situs determination and cystic kidney disease, yet its exact function remains unknown. In this study, we identify ANKS6 as a target and activator of NEK8. ANKS6 requires NEK8 for localizing to the ciliary inversin compartment (IC) and activates NEK8 by binding to its kinase domain. Here we demonstrate the functional importance of this interaction through the analysis of two novel mouse mutations, Anks6(Streaker) and Nek8(Roc). Both display heterotaxy, cardiopulmonary malformations and cystic kidneys, a syndrome also characteristic of mutations in Invs and Nphp3, the other known components of the IC. The Anks6(Strkr) mutation decreases ANKS6 interaction with NEK8, precluding NEK8 activation. The Nek8(Roc) mutation inactivates NEK8 kinase function while preserving ANKS6 localization to the IC. Together, these data reveal the crucial role of NEK8 kinase activation within the IC, promoting proper left-right patterning, cardiopulmonary development and renal morphogenesis. PMID:25599650

  12. Horizontal ventricular septum with dextroversion: hearts with and without aortic atresia.

    PubMed

    Thilenius, O G; Bharati, S; Lev, M; Karp, R B; Arcilla, R A

    1987-01-01

    Two hearts with horizontal ventricular septum, dextroversion (situs solitus), ventricular septal defects, and malaligned great vessels are reported. One of the hearts had aortic atresia and the infant died; the other patient had a Fontan-type physiologic correction. Reviewing the literature, the following conclusions are drawn: (a) Hearts with horizontal ventricular septum and those with criss-cross atrioventricular connections may be the result of different degrees of rotation of the ventricular muscle mass. This rotation is not likely to be postseptational but preseptational. (b) Only those hearts with a complete 180 degrees rotation should be called criss-cross hearts. (c) Partial rotation results in a horizontal septum such that the right ventricle is invariably superior, regardless of atrioventricular concordance or discordance, situs solitus or inversus, or dextroversion. (d) Physiologic surgical correction is often possible but has to be tailored to the details of each heart.

  13. Epilepsy (partial)

    PubMed Central

    2011-01-01

    Introduction About 3% of people will be diagnosed with epilepsy during their lifetime, but about 70% of people with epilepsy eventually go into remission. Methods and outcomes We conducted a systematic review and aimed to answer the following clinical questions: What are the effects of starting antiepileptic drug treatment following a single seizure? What are the effects of drug monotherapy in people with partial epilepsy? What are the effects of additional drug treatments in people with drug-resistant partial epilepsy? What is the risk of relapse in people in remission when withdrawing antiepileptic drugs? What are the effects of behavioural and psychological treatments for people with epilepsy? What are the effects of surgery in people with drug-resistant temporal lobe epilepsy? We searched: Medline, Embase, The Cochrane Library, and other important databases up to July 2009 (Clinical Evidence reviews are updated periodically; please check our website for the most up-to-date version of this review). We included harms alerts from relevant organisations such as the US Food and Drug Administration (FDA) and the UK Medicines and Healthcare products Regulatory Agency (MHRA). Results We found 83 systematic reviews, RCTs, or observational studies that met our inclusion criteria. We performed a GRADE evaluation of the quality of evidence for interventions. Conclusions In this systematic review we present information relating to the effectiveness and safety of the following interventions: antiepileptic drugs after a single seizure; monotherapy for partial epilepsy using carbamazepine, gabapentin, lamotrigine, levetiracetam, phenobarbital, phenytoin, sodium valproate, or topiramate; addition of second-line drugs for drug-resistant partial epilepsy (allopurinol, eslicarbazepine, gabapentin, lacosamide, lamotrigine, levetiracetam, losigamone, oxcarbazepine, retigabine, tiagabine, topiramate, vigabatrin, or zonisamide); antiepileptic drug withdrawal for people with partial or

  14. An Individual with Blepharophimosis-Ptosis-Epicanthus Inversus Syndrome (BPES) and Additional Features Expands the Phenotype Associated with Mutations in KAT6B

    PubMed Central

    Yu, Hung-Chun; Geiger, Elizabeth A.; Medne, Livija; Zackai, Elaine H.; Shaikh, Tamim H.

    2015-01-01

    Blepharophimosis-Ptosis-Epicanthus Inversus Syndrome (BPES) is an autosomal dominant disorder caused by mutations in FOXL2. We identified an individual with BPES and additional phenotypic features who did not have a FOXL2 mutation. We used whole exome sequencing to identify a de novo mutation in KAT6B (lysine acetyltransferase 6B) in this individual. The mutation was a 2 bp insertion leading to a frameshift which resulted in a premature stop codon. The resulting truncated protein does not have the C-terminal serine/methionine transcription activation domain necessary for interaction with other transcriptional and epigenetic regulators. This mutation likely has a dominant-negative or gain-of-function effect, similar to those observed in other genetic disorders resulting from KAT6B mutations, including Say-Barber-Biesecker-Young-Simpson (SBBYSS) and Genitopatellar syndrome (GTPTS). Thus, our subject’s phenotype broadens the spectrum of clinical findings associated with mutations in KAT6B. Furthermore, our results suggest that individuals with BPES without a FOXL2 mutation should be tested for KAT6B mutations. The transcriptional and epigenetic regulation mediated by KAT6B appears crucial to early developmental processes, which when perturbed can lead to a wide spectrum of phenotypic outcomes. PMID:24458743

  15. Angiographic studies of atrioventricular discordance.

    PubMed

    Attie, F; Soni, J; Ovseyevitz, J; Muñoz-Castellanos, L; Testelli, M R; Buendia, A

    1980-08-01

    The results and value of conventional and axial angiocardiography were studied in 26 cases of atrioventricular discordance (AVD). The angiographic anatomy of this malformation was analyzed to determine the precise characteristics of atrioventricular and ventriculoarterial connections. The left and right ventricles in atrial situs solitus and levocardia show angiographic features that differ from those seen in atrial situs solitus and dextrocardia. The same differences are found in atrial situs inversus. Regardless of the type of ventriculoarterial connections, the ventricles maintain the same angiographic characteristics. The ventricular septum in AVD in situs solitus and levocardia and situs inversus and dextrocardia has a peculiar orientation. The use of axial angiocardiography facilitates detection and localization of the ventricular septal defect. In cases of malposition of the heart, the conventional frontal view allows visualization of the ventricular septum in all of its length. The axial projection is useful in diagnosing left ventricular outflow tract obstruction.

  16. Genetic basis of human left-right asymmetry disorders.

    PubMed

    Deng, Hao; Xia, Hong; Deng, Sheng

    2015-01-01

    Humans and other vertebrates exhibit left-right (LR) asymmetric arrangement of the internal organs, and failure to establish normal LR asymmetry leads to internal laterality disorders, including situs inversus and heterotaxy. Situs inversus is complete mirror-imaged arrangement of the internal organs along LR axis, whereas heterotaxy is abnormal arrangement of the internal thoraco-abdominal organs across LR axis of the body, most of which are associated with complex cardiovascular malformations. Both disorders are genetically heterogeneous with reduced penetrance, presumably because of monogenic, polygenic or multifactorial causes. Research in genetics of LR asymmetry disorders has been extremely prolific over the past 17 years, and a series of loci and disease genes involved in situs inversus and heterotaxy have been described. The review highlights the classification, chromosomal abnormalities, pathogenic genes and the possible mechanism of human LR asymmetry disorders. PMID:26258520

  17. Partial (focal) seizure

    MedlinePlus

    ... Jacksonian seizure; Seizure - partial (focal); Temporal lobe seizure; Epilepsy - partial seizures ... Abou-Khalil BW, Gallagher MJ, Macdonald RL. Epilepsies. In: Daroff ... Practice . 7th ed. Philadelphia, PA: Elsevier; 2016:chap 101. ...

  18. Partial tooth gear bearings

    NASA Technical Reports Server (NTRS)

    Vranish, John M. (Inventor)

    2010-01-01

    A partial gear bearing including an upper half, comprising peak partial teeth, and a lower, or bottom, half, comprising valley partial teeth. The upper half also has an integrated roller section between each of the peak partial teeth with a radius equal to the gear pitch radius of the radially outwardly extending peak partial teeth. Conversely, the lower half has an integrated roller section between each of the valley half teeth with a radius also equal to the gear pitch radius of the peak partial teeth. The valley partial teeth extend radially inwardly from its roller section. The peak and valley partial teeth are exactly out of phase with each other, as are the roller sections of the upper and lower halves. Essentially, the end roller bearing of the typical gear bearing has been integrated into the normal gear tooth pattern.

  19. Acute anteroseptal myocardial infarction in a patient with dextrocardia.

    PubMed

    Alzand, Becker S N; Dennert, Robert; Kalkman, Robert; Gorgels, Anton P M

    2009-01-01

    Dextrocardia with situs inversus is an uncommon congenital condition in which the major visceral organs are reversed. The clinical diagnosis and electrocardiographic localization of myocardial infarctions in these patients remain a great challenge. We report a case of a 64-year-old man known with dextrocardia and situs inversus totalis presenting with acute chest pain irradiating to the right arm. The admission and reversed "normalized" electrocardiogram are presented, allowing for correct diagnosis of an acute anteroseptal myocardial infarction. The present case emphasizes the importance of performing a reversed electrocardiogram in patients with dextrocardia.

  20. Cardiopulmonary malformations in the inv/inv mouse.

    PubMed

    McQuinn, T C; Miga, D E; Mjaatvedt, C H; Phelps, A L; Wessels, A

    2001-05-01

    The inv/inv mouse carries an insertional mutation in the inversin gene, (inv, for inversion of embryonic turning). Previously it had been reported that almost 100% of the homozygous offspring (inv/inv) were characterized by situs inversus totalis. In this report we identify the spectrum of cardiopulmonary anatomical abnormalities in inv/inv mice surviving to birth to determine whether the abnormalities seen are of the categories classically associated with human situs abnormalities. Stillborn mice, offspring that died unexpectedly (within 48 hr after birth), and neonates with phenotypic characteristics of situs inversus (right-sided stomachs, growth failure or jaundice) were processed for standard histological examination. Of 173 offspring, 34 (20%) neonates (11 stillborn, 9 unexpected deaths, and 14 mice with situs inversus phenotype) were examined, 27 of which were genotyped to be inv/inv. Interestingly, three inv/inv mice (11%) were found to have situs solitus. Twenty-four had situs inversus with normal, mirror-image cardiac anatomy (dextrocardia with atrioventricular concordance, ventriculoarterial concordance and a right aortic arch). The overall incidence of cardiovascular anomalies observed was 10 out of 27 (37%). The most frequent severe malformation, identified in 3 out of 27 animals, was a complex consisting of pulmonary infundibular stenosis/atresia with absence of pulmonary valve tissue and a ventricular septal defect. The pulmonary phenotype in inv/inv mice was situs inversus with occasional minor lobar abnormalities. We conclude that 1) cardiopulmonary malformations in inv/inv mice are not rare (37%), 2) the cardiopulmonary malformations observed in inv/inv specimens are not of the spectrum typically associated with human heterotaxia. In particular, inv/inv mice have a propensity for defects in the development of the right ventricular outflow tract and the interventricular septum, and 3) approximately one out of ten inv/inv mice is born with situs

  1. Twisted partially pure spinors

    NASA Astrophysics Data System (ADS)

    Herrera, Rafael; Tellez, Ivan

    2016-08-01

    Motivated by the relationship between orthogonal complex structures and pure spinors, we define twisted partially pure spinors in order to characterize spinorially subspaces of Euclidean space endowed with a complex structure.

  2. Dextrocardia--value of segmental analysis in its categorisation.

    PubMed Central

    Calcaterra, G; Anderson, R H; Lau, K C; Shinebourne, E A

    1979-01-01

    Dextrocardia can be defined as a heart in the right chest with the major axis to the right. This definition, however, conveys no information regarding the chamber arrangements and internal anatomy of the heart. Of 40 patients satisfying this definition in the files of the Brompton Hospital, 33 had angiocardiographic data adequate for complete analysis in terms of connections, relations, and morphology of cardiac segments. They form the subject of this report. There were 16 (48%) patients with situs solitus, 11 (33%) with situs inversus, and six (18%) with situs ambiguus. Of the cases of situs ambiguus, four exhibited laevoisomerism and two dextroisomerism. Of the 16 patients with situs solitus, six had two ventricles and 10 had univentricular hearts; two patients had concordant and three discordant ventriculoarterial connections, seven had double outlet ventricle, and four a single outlet heart. Of the 11 patients with situs inversus, nine had two ventricles and two a univentricular heart of right ventricular type; the arterial connection was concordant in two, discordant in two, double outlet in six, and single outlet in one. Of the six patients with situs ambiguus and laevo or dextroisomerism, four had two ventricles, and two univentricular hearts; the arterial connection was concordant in one, double outlet in three, and single outlet in two. Segmental analysis and the use of basic descriptive terms are essential to define the complex anatomy of such hearts. Images PMID:518773

  3. Variance Components: Partialled vs. Common.

    ERIC Educational Resources Information Center

    Curtis, Ervin W.

    1985-01-01

    A new approach to partialling components is used. Like conventional partialling, this approach orthogonalizes variables by partitioning the scores or observations. Unlike conventional partialling, it yields a common component and two unique components. (Author/GDC)

  4. Methanol partial oxidation reformer

    DOEpatents

    Ahmed, S.; Kumar, R.; Krumpelt, M.

    1999-08-17

    A partial oxidation reformer is described comprising a longitudinally extending chamber having a methanol, water and an air inlet and an outlet. An igniter mechanism is near the inlets for igniting a mixture of methanol and air, while a partial oxidation catalyst in the chamber is spaced from the inlets and converts methanol and oxygen to carbon dioxide and hydrogen. Controlling the oxygen to methanol mole ratio provides continuous slightly exothermic partial oxidation reactions of methanol and air producing hydrogen gas. The liquid is preferably injected in droplets having diameters less than 100 micrometers. The reformer is useful in a propulsion system for a vehicle which supplies a hydrogen-containing gas to the negative electrode of a fuel cell. 7 figs.

  5. Methanol partial oxidation reformer

    DOEpatents

    Ahmed, Shabbir; Kumar, Romesh; Krumpelt, Michael

    1999-01-01

    A partial oxidation reformer comprising a longitudinally extending chamber having a methanol, water and an air inlet and an outlet. An igniter mechanism is near the inlets for igniting a mixture of methanol and air, while a partial oxidation catalyst in the chamber is spaced from the inlets and converts methanol and oxygen to carbon dioxide and hydrogen. Controlling the oxygen to methanol mole ratio provides continuous slightly exothermic partial oxidation reactions of methanol and air producing hydrogen gas. The liquid is preferably injected in droplets having diameters less than 100 micrometers. The reformer is useful in a propulsion system for a vehicle which supplies a hydrogen-containing gas to the negative electrode of a fuel cell.

  6. Methanol partial oxidation reformer

    DOEpatents

    Ahmed, Shabbir; Kumar, Romesh; Krumpelt, Michael

    2001-01-01

    A partial oxidation reformer comprising a longitudinally extending chamber having a methanol, water and an air inlet and an outlet. An igniter mechanism is near the inlets for igniting a mixture of methanol and air, while a partial oxidation catalyst in the chamber is spaced from the inlets and converts methanol and oxygen to carbon dioxide and hydrogen. Controlling the oxygen to methanol mole ratio provides continuous slightly exothermic partial oxidation reactions of methanol and air producing hydrogen gas. The liquid is preferably injected in droplets having diameters less than 100 micrometers. The reformer is useful in a propulsion system for a vehicle which supplies a hydrogen-containing gas to the negative electrode of a fuel cell.

  7. Methanol partial oxidation reformer

    DOEpatents

    Ahmed, S.; Kumar, R.; Krumpelt, M.

    1999-08-24

    A partial oxidation reformer is described comprising a longitudinally extending chamber having a methanol, water and an air inlet and an outlet. An igniter mechanism is near the inlets for igniting a mixture of methanol and air, while a partial oxidation catalyst in the chamber is spaced from the inlets and converts methanol and oxygen to carbon dioxide and hydrogen. Controlling the oxygen to methanol mole ratio provides continuous slightly exothermic partial oxidation reactions of methanol and air producing hydrogen gas. The liquid is preferably injected in droplets having diameters less than 100 micrometers. The reformer is useful in a propulsion system for a vehicle which supplies a hydrogen-containing gas to the negative electrode of a fuel cell. 7 figs.

  8. Oxygen partial pressure sensor

    DOEpatents

    Dees, D.W.

    1994-09-06

    A method for detecting oxygen partial pressure and an oxygen partial pressure sensor are provided. The method for measuring oxygen partial pressure includes contacting oxygen to a solid oxide electrolyte and measuring the subsequent change in electrical conductivity of the solid oxide electrolyte. A solid oxide electrolyte is utilized that contacts both a porous electrode and a nonporous electrode. The electrical conductivity of the solid oxide electrolyte is affected when oxygen from an exhaust stream permeates through the porous electrode to establish an equilibrium of oxygen anions in the electrolyte, thereby displacing electrons throughout the electrolyte to form an electron gradient. By adapting the two electrodes to sense a voltage potential between them, the change in electrolyte conductivity due to oxygen presence can be measured. 1 fig.

  9. Oxygen partial pressure sensor

    DOEpatents

    Dees, Dennis W.

    1994-01-01

    A method for detecting oxygen partial pressure and an oxygen partial pressure sensor are provided. The method for measuring oxygen partial pressure includes contacting oxygen to a solid oxide electrolyte and measuring the subsequent change in electrical conductivity of the solid oxide electrolyte. A solid oxide electrolyte is utilized that contacts both a porous electrode and a nonporous electrode. The electrical conductivity of the solid oxide electrolyte is affected when oxygen from an exhaust stream permeates through the porous electrode to establish an equilibrium of oxygen anions in the electrolyte, thereby displacing electrons throughout the electrolyte to form an electron gradient. By adapting the two electrodes to sense a voltage potential between them, the change in electrolyte conductivity due to oxygen presence can be measured.

  10. Dynamics of partial control.

    PubMed

    Sabuco, Juan; Sanjuán, Miguel A F; Yorke, James A

    2012-12-01

    Safe sets are a basic ingredient in the strategy of partial control of chaotic systems. Recently we have found an algorithm, the sculpting algorithm, which allows us to construct them, when they exist. Here we define another type of set, an asymptotic safe set, to which trajectories are attracted asymptotically when the partial control strategy is applied. We apply all these ideas to a specific example of a Duffing oscillator showing the geometry of these sets in phase space. The software for creating all the figures appearing in this paper is available as supplementary material. PMID:23278093

  11. Partial hue-matching.

    PubMed

    Logvinenko, Alexander D; Beattie, Lesley L

    2011-01-01

    It is widely believed that color can be decomposed into a small number of component colors. Particularly, each hue can be described as a combination of a restricted set of component hues. Methods, such as color naming and hue scaling, aim at describing color in terms of the relative amount of the component hues. However, there is no consensus on the nomenclature of component hues. Moreover, the very notion of hue (not to mention component hue) is usually defined verbally rather than perceptually. In this paper, we make an attempt to operationalize such a fundamental attribute of color as hue without the use of verbal terms. Specifically, we put forth a new method--partial hue-matching--that is based on judgments of whether two colors have some hue in common. It allows a set of component hues to be established objectively, without resorting to verbal definitions. Specifically, the largest sets of color stimuli, all of which partially match each other (referred to as chromaticity classes), can be derived from the observer's partial hue-matches. A chromaticity class proves to consist of all color stimuli that contain a particular component hue. Thus, the chromaticity classes fully define the set of component hues. Using samples of Munsell papers, a few experiments on partial hue-matching were carried out with twelve inexperienced normal trichromatic observers. The results reinforce the classical notion of four component hues (yellow, blue, red, and green). Black and white (but not gray) were also found to be component colors. PMID:21742961

  12. Partial knee replacement

    MedlinePlus

    ... You will need to understand what surgery and recovery will be like. Partial knee arthroplasty may be a good choice if you have arthritis in only one side or part of the knee and: You are older, thin, and not very active. You do not ...

  13. Partially integrated exhaust manifold

    SciTech Connect

    Hayman, Alan W; Baker, Rodney E

    2015-01-20

    A partially integrated manifold assembly is disclosed which improves performance, reduces cost and provides efficient packaging of engine components. The partially integrated manifold assembly includes a first leg extending from a first port and terminating at a mounting flange for an exhaust gas control valve. Multiple additional legs (depending on the total number of cylinders) are integrally formed with the cylinder head assembly and extend from the ports of the associated cylinder and terminate at an exit port flange. These additional legs are longer than the first leg such that the exit port flange is spaced apart from the mounting flange. This configuration provides increased packaging space adjacent the first leg for any valving that may be required to control the direction and destination of exhaust flow in recirculation to an EGR valve or downstream to a catalytic converter.

  14. Partially coherent ultrafast spectrography

    PubMed Central

    Bourassin-Bouchet, C.; Couprie, M.-E.

    2015-01-01

    Modern ultrafast metrology relies on the postulate that the pulse to be measured is fully coherent, that is, that it can be completely described by its spectrum and spectral phase. However, synthesizing fully coherent pulses is not always possible in practice, especially in the domain of emerging ultrashort X-ray sources where temporal metrology is strongly needed. Here we demonstrate how frequency-resolved optical gating (FROG), the first and one of the most widespread techniques for pulse characterization, can be adapted to measure partially coherent pulses even down to the attosecond timescale. No modification of experimental apparatuses is required; only the processing of the measurement changes. To do so, we take our inspiration from other branches of physics where partial coherence is routinely dealt with, such as quantum optics and coherent diffractive imaging. This will have important and immediate applications, such as enabling the measurement of X-ray free-electron laser pulses despite timing jitter. PMID:25744080

  15. Laparoscopic partial splenic resection.

    PubMed

    Uranüs, S; Pfeifer, J; Schauer, C; Kronberger, L; Rabl, H; Ranftl, G; Hauser, H; Bahadori, K

    1995-04-01

    Twenty domestic pigs with an average weight of 30 kg were subjected to laparoscopic partial splenic resection with the aim of determining the feasibility, reliability, and safety of this procedure. Unlike the human spleen, the pig spleen is perpendicular to the body's long axis, and it is long and slender. The parenchyma was severed through the middle third, where the organ is thickest. An 18-mm trocar with a 60-mm Endopath linear cutter was used for the resection. The tissue was removed with a 33-mm trocar. The operation was successfully concluded in all animals. No capsule tears occurred as a result of applying the stapler. Optimal hemostasis was achieved on the resected edges in all animals. Although these findings cannot be extended to human surgery without reservations, we suggest that diagnostic partial resection and minor cyst resections are ideal initial indications for this minimally invasive approach.

  16. Partially coherent ultrafast spectrography

    NASA Astrophysics Data System (ADS)

    Bourassin-Bouchet, C.; Couprie, M.-E.

    2015-03-01

    Modern ultrafast metrology relies on the postulate that the pulse to be measured is fully coherent, that is, that it can be completely described by its spectrum and spectral phase. However, synthesizing fully coherent pulses is not always possible in practice, especially in the domain of emerging ultrashort X-ray sources where temporal metrology is strongly needed. Here we demonstrate how frequency-resolved optical gating (FROG), the first and one of the most widespread techniques for pulse characterization, can be adapted to measure partially coherent pulses even down to the attosecond timescale. No modification of experimental apparatuses is required; only the processing of the measurement changes. To do so, we take our inspiration from other branches of physics where partial coherence is routinely dealt with, such as quantum optics and coherent diffractive imaging. This will have important and immediate applications, such as enabling the measurement of X-ray free-electron laser pulses despite timing jitter.

  17. Melancholia and partial insanity.

    PubMed

    Jackson, S W

    1983-04-01

    In the medical literature of the eighteenth century melancholia came to be defined as partial insanity. Seventeenth-century English law introduced the term and influenced later forensic concerns about the concept. But the history of melancholia reveals a gradual development of such a concept of limited derangement associated with the delusions usually cited in accounts of this disease. In the early nineteenth century the relationship of melancholia and this concept weakened and was gradually abandoned, the content of the syndrome of melancholia was reduced, and out of this complex process emerged the notion of monomania.

  18. Esthetic removable partial dentures.

    PubMed

    Ancowitz, Stephen

    2004-01-01

    This article provides information regarding the many ways that removable partial dentures (RPDs) may be used to solve restorative problems in the esthetic zone without displaying metal components or conspicuous acrylic resin flanges. The esthetic zone is defined and described, as are methods for recording it. Six dental categories are presented that assist the dentist in choosing a variety of RPD design concepts that may be used to avoid metal display while still satisfying basic principles of RPDs. New materials that may be utilized for optimal esthetics are presented and techniques for contouring acrylic resin bases and tinting denture bases are described.

  19. Experts' Understanding of Partial Derivatives Using the Partial Derivative Machine

    ERIC Educational Resources Information Center

    Roundy, David; Weber, Eric; Dray, Tevian; Bajracharya, Rabindra R.; Dorko, Allison; Smith, Emily M.; Manogue, Corinne A.

    2015-01-01

    Partial derivatives are used in a variety of different ways within physics. Thermodynamics, in particular, uses partial derivatives in ways that students often find especially confusing. We are at the beginning of a study of the teaching of partial derivatives, with a goal of better aligning the teaching of multivariable calculus with the needs of…

  20. Is Titan Partially Differentiated?

    NASA Astrophysics Data System (ADS)

    Mitri, G.; Pappalardo, R. T.; Stevenson, D. J.

    2009-12-01

    The recent measurement of the gravity coefficients from the Radio Doppler data of the Cassini spacecraft has improved our knowledge of the interior structure of Titan (Rappaport et al. 2008 AGU, P21A-1343). The measured gravity field of Titan is dominated by near hydrostatic quadrupole components. We have used the measured gravitational coefficients, thermal models and the hydrostatic equilibrium theory to derive Titan's interior structure. The axial moment of inertia gives us an indication of the degree of the interior differentiation. The inferred axial moment of inertia, calculated using the quadrupole gravitational coefficients and the Radau-Darwin approximation, indicates that Titan is partially differentiated. If Titan is partially differentiated then the interior must avoid melting of the ice during its evolution. This suggests a relatively late formation of Titan to avoid the presence of short-lived radioisotopes (Al-26). This also suggests the onset of convection after accretion to efficiently remove the heat from the interior. The outer layer is likely composed mainly of water in solid phase. Thermal modeling indicates that water could be present also in liquid phase forming a subsurface ocean between an outer ice I shell and a high pressure ice layer. Acknowledgments: This work was conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

  1. Partial Triceps Disruption

    PubMed Central

    Foulk, David M.; Galloway, Marc T.

    2011-01-01

    Partial triceps tendon disruptions are a rare injury that can lead to debilitating outcomes if misdiagnosed or managed inappropriately. The clinician should have a high index of suspicion when the mechanism involves a fall onto an outstretched arm and there is resultant elbow extension weakness along with pain and swelling. The most common location of rupture is at the tendon-osseous junction. This case report illustrates a partial triceps tendon disruption with involvement of, primarily, the medial head and the superficial expansion. Physical examination displayed weakness with resisted elbow extension in a flexed position over 90°. Radiographs revealed a tiny fleck of bone proximal to the olecranon, but this drastically underestimated the extent of injury upon surgical exploration. Magnetic resonance imaging is essential to ascertain the percentage involvement of the tendon; it can be used for patient education and subsequently to determine treatment recommendations. Although excellent at finding associated pathology, it may misjudge the size of the tear. As such, physicians must consider associated comorbidities and patient characteristics when formulating treatment plans. PMID:23016005

  2. Partially segmented deformable mirror

    DOEpatents

    Bliss, E.S.; Smith, J.R.; Salmon, J.T.; Monjes, J.A.

    1991-05-21

    A partially segmented deformable mirror is formed with a mirror plate having a smooth and continuous front surface and a plurality of actuators to its back surface. The back surface is divided into triangular areas which are mutually separated by grooves. The grooves are deep enough to make the plate deformable and the actuators for displacing the mirror plate in the direction normal to its surface are inserted in the grooves at the vertices of the triangular areas. Each actuator includes a transducer supported by a receptacle with outer shells having outer surfaces. The vertices have inner walls which are approximately perpendicular to the mirror surface and make planar contacts with the outer surfaces of the outer shells. The adhesive which is used on these contact surfaces tends to contract when it dries but the outer shells can bend and serve to minimize the tendency of the mirror to warp. 5 figures.

  3. Partially segmented deformable mirror

    DOEpatents

    Bliss, Erlan S.; Smith, James R.; Salmon, J. Thaddeus; Monjes, Julio A.

    1991-01-01

    A partially segmented deformable mirror is formed with a mirror plate having a smooth and continuous front surface and a plurality of actuators to its back surface. The back surface is divided into triangular areas which are mutually separated by grooves. The grooves are deep enough to make the plate deformable and the actuators for displacing the mirror plate in the direction normal to its surface are inserted in the grooves at the vertices of the triangular areas. Each actuator includes a transducer supported by a receptacle with outer shells having outer surfaces. The vertices have inner walls which are approximately perpendicular to the mirror surface and make planar contacts with the outer surfaces of the outer shells. The adhesive which is used on these contact surfaces tends to contract when it dries but the outer shells can bend and serve to minimize the tendency of the mirror to warp.

  4. Partial oxidation catalyst

    DOEpatents

    Krumpelt, Michael; Ahmed, Shabbir; Kumar, Romesh; Doshi, Rajiv

    2000-01-01

    A two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion. The dehydrogenation portion is a group VIII metal and the oxide-ion conducting portion is selected from a ceramic oxide crystallizing in the fluorite or perovskite structure. There is also disclosed a method of forming a hydrogen rich gas from a source of hydrocarbon fuel in which the hydrocarbon fuel contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion at a temperature not less than about 400.degree. C. for a time sufficient to generate the hydrogen rich gas while maintaining CO content less than about 5 volume percent. There is also disclosed a method of forming partially oxidized hydrocarbons from ethanes in which ethane gas contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion for a time and at a temperature sufficient to form an oxide.

  5. Robot-assisted partial nephrectomy: Superiority over laparoscopic partial nephrectomy.

    PubMed

    Shiroki, Ryoichi; Fukami, Naohiko; Fukaya, Kosuke; Kusaka, Mamoru; Natsume, Takahiro; Ichihara, Takashi; Toyama, Hiroshi

    2016-02-01

    Nephron-sparing surgery has been proven to positively impact the postoperative quality of life for the treatment of small renal tumors, possibly leading to functional improvements. Laparoscopic partial nephrectomy is still one of the most demanding procedures in urological surgery. Laparoscopic partial nephrectomy sometimes results in extended warm ischemic time and severe complications, such as open conversion, postoperative hemorrhage and urine leakage. Robot-assisted partial nephrectomy exploits the advantages offered by the da Vinci Surgical System to laparoscopic partial nephrectomy, equipped with 3-D vision and a better degree in the freedom of surgical instruments. The introduction of the da Vinci Surgical System made nephron-sparing surgery, specifically robot-assisted partial nephrectomy, safe with promising results, leading to the shortening of warm ischemic time and a reduction in perioperative complications. Even for complex and challenging tumors, robotic assistance is expected to provide the benefit of minimally-invasive surgery with safe and satisfactory renal function. Warm ischemic time is the modifiable factor during robot-assisted partial nephrectomy to affect postoperative kidney function. We analyzed the predictive factors for extended warm ischemic time from our robot-assisted partial nephrectomy series. The surface area of the tumor attached to the kidney parenchyma was shown to significantly affect the extended warm ischemic time during robot-assisted partial nephrectomy. In cases with tumor-attached surface area more than 15 cm(2) , we should consider switching robot-assisted partial nephrectomy to open partial nephrectomy under cold ischemia if it is imperative. In Japan, a nationwide prospective study has been carried out to show the superiority of robot-assisted partial nephrectomy to laparoscopic partial nephrectomy in improving warm ischemic time and complications. By facilitating robotic technology, robot-assisted partial nephrectomy

  6. Partially supervised speaker clustering.

    PubMed

    Tang, Hao; Chu, Stephen Mingyu; Hasegawa-Johnson, Mark; Huang, Thomas S

    2012-05-01

    Content-based multimedia indexing, retrieval, and processing as well as multimedia databases demand the structuring of the media content (image, audio, video, text, etc.), one significant goal being to associate the identity of the content to the individual segments of the signals. In this paper, we specifically address the problem of speaker clustering, the task of assigning every speech utterance in an audio stream to its speaker. We offer a complete treatment to the idea of partially supervised speaker clustering, which refers to the use of our prior knowledge of speakers in general to assist the unsupervised speaker clustering process. By means of an independent training data set, we encode the prior knowledge at the various stages of the speaker clustering pipeline via 1) learning a speaker-discriminative acoustic feature transformation, 2) learning a universal speaker prior model, and 3) learning a discriminative speaker subspace, or equivalently, a speaker-discriminative distance metric. We study the directional scattering property of the Gaussian mixture model (GMM) mean supervector representation of utterances in the high-dimensional space, and advocate exploiting this property by using the cosine distance metric instead of the euclidean distance metric for speaker clustering in the GMM mean supervector space. We propose to perform discriminant analysis based on the cosine distance metric, which leads to a novel distance metric learning algorithm—linear spherical discriminant analysis (LSDA). We show that the proposed LSDA formulation can be systematically solved within the elegant graph embedding general dimensionality reduction framework. Our speaker clustering experiments on the GALE database clearly indicate that 1) our speaker clustering methods based on the GMM mean supervector representation and vector-based distance metrics outperform traditional speaker clustering methods based on the “bag of acoustic features” representation and statistical

  7. Trigonometric Integrals via Partial Fractions

    ERIC Educational Resources Information Center

    Chen, H.; Fulford, M.

    2005-01-01

    Parametric differentiation is used to derive the partial fractions decompositions of certain rational functions. Those decompositions enable us to integrate some new combinations of trigonometric functions.

  8. Experts' understanding of partial derivatives using the partial derivative machine

    NASA Astrophysics Data System (ADS)

    Roundy, David; Weber, Eric; Dray, Tevian; Bajracharya, Rabindra R.; Dorko, Allison; Smith, Emily M.; Manogue, Corinne A.

    2015-12-01

    [This paper is part of the Focused Collection on Upper Division Physics Courses.] Partial derivatives are used in a variety of different ways within physics. Thermodynamics, in particular, uses partial derivatives in ways that students often find especially confusing. We are at the beginning of a study of the teaching of partial derivatives, with a goal of better aligning the teaching of multivariable calculus with the needs of students in STEM disciplines. In this paper, we report on an initial study of expert understanding of partial derivatives across three disciplines: physics, engineering, and mathematics. We report on the central research question of how disciplinary experts understand partial derivatives, and how their concept images of partial derivatives differ, with a focus on experimentally measured quantities. Using the partial derivative machine (PDM), we probed expert understanding of partial derivatives in an experimental context without a known functional form. In particular, we investigated which representations were cued by the experts' interactions with the PDM. Whereas the physicists and engineers were quick to use measurements to find a numeric approximation for a derivative, the mathematicians repeatedly returned to speculation as to the functional form; although they were comfortable drawing qualitative conclusions about the system from measurements, they were reluctant to approximate the derivative through measurement. On a theoretical front, we found ways in which existing frameworks for the concept of derivative could be expanded to include numerical approximation.

  9. Partial confinement photonic crystal waveguides

    SciTech Connect

    Saini, S.; Hong, C.-Y.; Pfaff, N.; Kimerling, L. C.; Michel, J.

    2008-12-29

    One-dimensional photonic crystal waveguides with an incomplete photonic band gap are modeled and proposed for an integration application that exploits their property of partial angular confinement. Planar apodized photonic crystal structures are deposited by plasma enhanced chemical vapor deposition and characterized by reflectivity as a function of angle and polarization, validating a partial confinement design for light at 850 nm wavelength. Partial confinement identifies an approach for tailoring waveguide properties by the exploitation of conformal film deposition over a substrate with angularly dependent topology. An application for an optoelectronic transceiver is demonstrated.

  10. Partial-Payload Support Structure

    NASA Technical Reports Server (NTRS)

    Mitchell, R.; Freeman, M.

    1984-01-01

    Partial-payload support structure (PPSS) is modular, bridge like structure supporting experiments weighing up to 2 tons. PPSS handles such experiments more economically than standard Spacelab pallet system.

  11. Complex partial status and schizophrenia.

    PubMed

    Ardila, A; Gómez, J

    1988-04-01

    Three cases of complex partial status which were diagnosed as psychotic episodes are presented. The scans of two of these cases show structural abnormalities in the left temporal lobe. It is proposed that there are similar neurophysiological mechanisms in primary schizophrenia and in the perceptual, affective and cognitive phenomena apparent is some complex and psychic partial seizures. The hippocampal-amygdaline system plays a central role in both cases.

  12. [Acrylic resin removable partial dentures].

    PubMed

    de Baat, C; Witter, D J; Creugers, N H J

    2011-01-01

    An acrylic resin removable partial denture is distinguished from other types of removable partial dentures by an all-acrylic resin base which is, in principle, solely supported by the edentulous regions of the tooth arch and in the maxilla also by the hard palate. When compared to the other types of removable partial dentures, the acrylic resin removable partial denture has 3 favourable aspects: the economic aspect, its aesthetic quality and the ease with which it can be extended and adjusted. Disadvantages are an increased risk of caries developing, gingivitis, periodontal disease, denture stomatitis, alveolar bone reduction, tooth migration, triggering of the gag reflex and damage to the acrylic resin base. Present-day indications are ofa temporary or palliative nature or are motivated by economic factors. Special varieties of the acrylic resin removable partial denture are the spoon denture, the flexible denture fabricated of non-rigid acrylic resin, and the two-piece sectional denture. Furthermore, acrylic resin removable partial dentures can be supplied with clasps or reinforced by fibers or metal wires.

  13. Reasonable partiality in professional relationships.

    PubMed

    Almond, Brenda

    2005-04-01

    First, two aspects of the partiality issue are identified: (1) Is it right/reasonable for professionals to favour their clients' interests over either those of other individuals or those of society in general? (2) Are special non-universalisable obligations attached to certain professional roles? Second, some comments are made on the notions of partiality and reasonableness. On partiality, the assumption that only two positions are possible--a detached universalism or a partialist egoism--is challenged and it is suggested that partiality, e.g. to family members, lies between these two positions, being neither a form of egoism, nor of impersonal detachment. On reasonableness, it is pointed out that 'reasonable' is an ambiguous concept, eliding the notions of the 'morally right' and the 'rational.' Third, a series of practical examples are taken from counselling, medicine, law, education and religious practice and some common principles are abstracted from the cases and discussed. These include truth-telling, confidentiality, conflicts of interest between clients and particular others and between clients and society. It is concluded that while partiality can be justified as a useful tool in standard cases, particular circumstances can affect the final verdict.

  14. Landsliding in partially saturated materials

    NASA Astrophysics Data System (ADS)

    Godt, Jonathan W.; Baum, Rex L.; Lu, Ning

    2009-01-01

    Rainfall-induced landslides are pervasive in hillslope environments around the world and among the most costly and deadly natural hazards. However, capturing their occurrence with scientific instrumentation in a natural setting is extremely rare. The prevailing thinking on landslide initiation, particularly for those landslides that occur under intense precipitation, is that the failure surface is saturated and has positive pore-water pressures acting on it. Most analytic methods used for landslide hazard assessment are based on the above perception and assume that the failure surface is located beneath a water table. By monitoring the pore water and soil suction response to rainfall, we observed shallow landslide occurrence under partially saturated conditions for the first time in a natural setting. We show that the partially saturated shallow landslide at this site is predictable using measured soil suction and water content and a novel unified effective stress concept for partially saturated earth materials.

  15. Landsliding in partially saturated materials

    USGS Publications Warehouse

    Godt, J.W.; Baum, R.L.; Lu, N.

    2009-01-01

    [1] Rainfall-induced landslides are pervasive in hillslope environments around the world and among the most costly and deadly natural hazards. However, capturing their occurrence with scientific instrumentation in a natural setting is extremely rare. The prevailing thinking on landslide initiation, particularly for those landslides that occur under intense precipitation, is that the failure surface is saturated and has positive pore-water pressures acting on it. Most analytic methods used for landslide hazard assessment are based on the above perception and assume that the failure surface is located beneath a water table. By monitoring the pore water and soil suction response to rainfall, we observed shallow landslide occurrence under partially saturated conditions for the first time in a natural setting. We show that the partially saturated shallow landslide at this site is predictable using measured soil suction and water content and a novel unified effective stress concept for partially saturated earth materials. Copyright 2009 by the American Geophysical Union.

  16. Partial pressure analysis of plasmas

    SciTech Connect

    Dylla, H.F.

    1984-11-01

    The application of partial pressure analysis for plasma diagnostic measurements is reviewed. A comparison is made between the techniques of plasma flux analysis and partial pressure analysis for mass spectrometry of plasmas. Emphasis is given to the application of quadrupole mass spectrometers (QMS). The interface problems associated with the coupling of a QMS to a plasma device are discussed including: differential-pumping requirements, electromagnetic interferences from the plasma environment, the detection of surface-active species, ion source interactions, and calibration procedures. Example measurements are presented from process monitoring of glow discharge plasmas which are useful for cleaning and conditioning vacuum vessels.

  17. Full and partial gauge fixing

    SciTech Connect

    Shirzad, A.

    2007-08-15

    Gauge fixing may be done in different ways. We show that using the chain structure to describe a constrained system enables us to use either a full gauge, in which all gauged degrees of freedom are determined, or a partial gauge, in which some first class constraints remain as subsidiary conditions to be imposed on the solutions of the equations of motion. We also show that the number of constants of motion depends on the level in a constraint chain in which the gauge fixing condition is imposed. The relativistic point particle, electromagnetism, and the Polyakov string are discussed as examples and full or partial gauges are distinguished.

  18. Apparatus for generating partially coherent radiation

    DOEpatents

    Naulleau, Patrick P.

    2005-02-22

    Techniques for generating partially coherent radiation and particularly for converting effectively coherent radiation from a synchrotron to partially coherent EUV radiation suitable for projection lithography.

  19. An unusual regression of the symptoms of Kartagener syndrome.

    PubMed

    Serapinas, Danielius; Staikūnienė, Jūratė; Barkauskienė, Diana; Jackutė, Jurgita; Sakalauskas, Raimundas

    2013-01-01

    Kartagener's syndrome is a rare autosomal-recessive genetic disease with progressive damage of the respiratory system and situs inversus. Although the management of patients with Kartagener's syndrome remains uncertain and evidence is limited, it is important to follow up these patients with an adequate and shared care system. This report presents a clinical case of Kartagener's syndrome in a 25-year-old woman. Computed tomography showed dextrocardia and bronchiectasis. Abdominal X-ray and ultrasound confirmed situs inversus totalis. After 7 years, good treatment results were achieved: lung function improved and radiological findings showed no changes. The present case discusses the complex interrelationship between the genetic variation and a proper nonspecific management of Kartagener's syndrome.

  20. Endoscopic Sinus Surgery for Treatment of Kartagener Syndrome: A Case Report

    PubMed Central

    Tang, Xinghua; Zou, Jian; Liu, Shixi

    2013-01-01

    Background: Kartagener syndrome (KS) is a rare congenital disease characterised by a clinical triad of symptoms: situs inversus, chronic rhinosinusitis, and bronchiectasis. Although congenital ciliary defect is recognised as the main cause of this syndrome, it remains difficult to treat the associated airway infection. Case Report: A 17-year-old female patient presented with repeated refractory airway infection. She also had bronchiectasis and situs inversus. Electron microscopic evaluation of her nasal mucosa revealed ciliary defect and confirmed the diagnosis of KS. She underwent functional endoscopic sinus surgery (FESS) followed by long-term postoperative debridement of the sinonasal cavity. This treatment reduced chronic rhinosinusitis and protected against subsequent airway infection in a 7-year follow-up. Conclusion: FESS is effective for relieving both chronic rhinosinusitis and lung infection of KS in the long term. PMID:25207108

  1. Partially Opened Oven on Phoenix

    NASA Technical Reports Server (NTRS)

    2008-01-01

    This view from the Robotic Arm Camera on NASA's Phoenix Mars Lander shows partial opening of doors to one of the tiny ovens of the Thermal and Evolved-Gas Analyzer.

    Each oven has a pair of spring-loaded doors. Near the center of the image, the partial opening of a pair of doors reveals screen over the opening where a soil sample will be delivered. The door to the right is fully opened and the one to the left is partially deployed. The doors are 10 centimeters (4 inches) long. The opening is 4 centimeters (1.5 inches) wide.

    Tests on the Phoenix testbed at the University of Arizona, Tucson, indicate that a soil sample could be delivered into the oven through the partially opened doors. Engineers are also exploring possibilities for opening the doors more completely.This image was taken during Phoenix's eighth Martian day, or sol (June 2, 2008).

    The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  2. Assessing Partial Knowledge in Vocabulary.

    ERIC Educational Resources Information Center

    Smith, Richard M.

    1987-01-01

    Partial knowledge was assessed in a multiple choice vocabulary test. Test reliability and concurrent validity were compared using Rasch-based dichotomous and polychotomous scoring models. Results supported the polychtomous scoring model, and moderately supported J. O'Connor's theory of vocabulary acquisition. (Author/GDC)

  3. Covert Reinforcement: A Partial Replication.

    ERIC Educational Resources Information Center

    Ripstra, Constance C.; And Others

    A partial replication of an investigation of the effect of covert reinforcement on a perceptual estimation task is described. The study was extended to include an extinction phase. There were five treatment groups: covert reinforcement, neutral scene reinforcement, noncontingent covert reinforcement, and two control groups. Each subject estimated…

  4. Partially molten magma ocean model

    SciTech Connect

    Shirley, D.N.

    1983-02-15

    The properties of the lunar crust and upper mantle can be explained if the outer 300-400 km of the moon was initially only partially molten rather than fully molten. The top of the partially molten region contained about 20% melt and decreased to 0% at 300-400 km depth. Nuclei of anorthositic crust formed over localized bodies of magma segregated from the partial melt, then grew peripherally until they coverd the moon. Throughout most of its growth period the anorthosite crust floated on a layer of magma a few km thick. The thickness of this layer is regulated by the opposing forces of loss of material by fractional crystallization and addition of magma from the partial melt below. Concentrations of Sr, Eu, and Sm in pristine ferroan anorthosites are found to be consistent with this model, as are trends for the ferroan anorthosites and Mg-rich suites on a diagram of An in plagioclase vs. mg in mafics. Clustering of Eu, Sr, and mg values found among pristine ferroan anorthosites are predicted by this model.

  5. Leadership in Partially Distributed Teams

    ERIC Educational Resources Information Center

    Plotnick, Linda

    2009-01-01

    Inter-organizational collaboration is becoming more common. When organizations collaborate they often do so in partially distributed teams (PDTs). A PDT is a hybrid team that has at least one collocated subteam and at least two subteams that are geographically distributed and communicate primarily through electronic media. While PDTs share many…

  6. The partial-birth stratagem.

    PubMed

    1998-06-01

    In Wisconsin, physicians stopped performing abortions when a Federal District Court Judge refused to issue a temporary restraining order against the state's newly enacted "partial birth" abortion ban that was couched in such vague language it actually covered all abortions. While ostensibly attempting to ban late-term "intact dilation and extraction," the language of the law did not refer to that procedure or to late terms. Instead, it prohibited all abortions in which a physician "partially vaginally delivers a living child, causes the death of the partially delivered child with the intent to kill the child and then completes the delivery of the child." The law also defined "child" as "a human being from the time of fertilization" until birth. It is clear that this abortion ban is unconstitutional under Row v. Wade, and this unconstitutionality is compounded by the fact that the law allowed no exception to protect a woman's health, which is required by Roe for abortion bans after fetal viability. Wisconsin is only one of about 28 states that have enacted similar laws, and only two have restricted the ban to postviability abortions. Many of these laws have been struck down in court, and President Clinton has continued to veto the Federal partial-birth bill. The Wisconsin Judge acknowledged that opponents of the ban will likely prevail when the case is heard, but his action in denying the temporary injunction means that many women in Wisconsin will not receive timely medical care. The partial birth strategy is really only another anti-abortion strategy.

  7. Successful percutaneous coronary intervention for chronic total occlusion of right coronary artery in patient with dextrocardia.

    PubMed

    Munawar, Muhammad; Hartono, Beny; Iskandarsyah, Kurniawan; Nguyen, Thach N

    2013-07-01

    Situs inversus with dextrocardia is rare congenital anomaly. Coronary artery disease in such patients is quite rare. We reported a 52-year-old man with dextrocardia and chronic total occlusion at the proximal right coronary artery just after conus branch and severe stenosis at the proximal left anterior descending artery. He underwent successful percutaneous coronary intervention with stenting of total occluded right coronary artery and simultaneously stenting of the proximal left anterior descending artery.

  8. Valve sparing surgery in an adult patient with dextrocardia and annuloaortic ectasia.

    PubMed

    Zeybek, Rahmi; Bacaksiz, Ahmet; Sharifov, Rasul; Sevgili, Emrah; Ay, Yasin

    2016-03-01

    We report the case of a patient with situs inversus totalis, annuloaortic ectasia complicated by aortic insufficiency and mitral regurgitation which induced congestive heart failure. Both valvular lesions were repaired physiologically using aortic root sparing Yacoub 'remodeling' technique and mitral ring annuloplasty. Valve sparing techniques can be used effectively even in patients with complicated clinical scenarios (like dextrocardia and annuloaortic ectasia) to avoid the potential risks related to prosthetic valve implantation and lifelong anticoagulation therapy.

  9. Valve sparing surgery in an adult patient with dextrocardia and annuloaortic ectasia

    PubMed Central

    Zeybek, Rahmi; Sharifov, Rasul; Sevgili, Emrah; Ay, Yasin

    2016-01-01

    We report the case of a patient with situs inversus totalis, annuloaortic ectasia complicated by aortic insufficiency and mitral regurgitation which induced congestive heart failure. Both valvular lesions were repaired physiologically using aortic root sparing Yacoub ‘remodeling’ technique and mitral ring annuloplasty. Valve sparing techniques can be used effectively even in patients with complicated clinical scenarios (like dextrocardia and annuloaortic ectasia) to avoid the potential risks related to prosthetic valve implantation and lifelong anticoagulation therapy. PMID:27212978

  10. Cutaneous manifestations and impaired chemotaxis of polymorphonuclear leukocytes associated with Kartagener's syndrome.

    PubMed

    Brenner, S; Tur, E; Fishel, B; Alkan, M; Topilsky, M

    1991-01-01

    Persistent deep-seated folliculitis and impaired chemotaxis are described in a 24-year-old woman with situs inversus, bronchitis and sinusitis, i.e. the three characteristics of Kartagener's syndrome. While patients with chemotactic defects not associated with the syndrome often suffer from skin infections, to the best of our knowledge this is the first report of a Kartagener patient with cutaneous manifestations.

  11. Recurrent respiratory infections and unusual radiology: a woman with Kartagener's syndrome.

    PubMed

    Ronnevi, Cecilia; Ortiz-Villalon, Cristian; Pawlowski, Jacek; Ferrara, Giovanni

    2015-01-01

    A 39-year-old woman with known situs inversus and a medical history of asthma had been suffering from recurring bronchial pneumonias and sinusitis for as long as she could remember. After being treated several times with antibiotics due to the frequent respiratory infections and after a CT scan that showed bilateral bronchiectasis, she was referred to the department of respiratory diseases, where another confirming X-ray and a bronchoscopy were performed based on a suspicion of Kartagener's syndrome. PMID:26354839

  12. Recurrent respiratory infections and unusual radiology: a woman with Kartagener's syndrome.

    PubMed

    Ronnevi, Cecilia; Ortiz-Villalon, Cristian; Pawlowski, Jacek; Ferrara, Giovanni

    2015-01-01

    A 39-year-old woman with known situs inversus and a medical history of asthma had been suffering from recurring bronchial pneumonias and sinusitis for as long as she could remember. After being treated several times with antibiotics due to the frequent respiratory infections and after a CT scan that showed bilateral bronchiectasis, she was referred to the department of respiratory diseases, where another confirming X-ray and a bronchoscopy were performed based on a suspicion of Kartagener's syndrome.

  13. Wettability of partially suspended graphene

    PubMed Central

    Ondarçuhu, Thierry; Thomas, Vincent; Nuñez, Marc; Dujardin, Erik; Rahman, Atikur; Black, Charles T.; Checco, Antonio

    2016-01-01

    The dependence of the wettability of graphene on the nature of the underlying substrate remains only partially understood. Here, we systematically investigate the role of liquid-substrate interactions on the wettability of graphene by varying the area fraction of suspended graphene from 0 to 95% by means of nanotextured substrates. We find that completely suspended graphene exhibits the highest water contact angle (85° ± 5°) compared to partially suspended or supported graphene, regardless of the hydrophobicity (hydrophilicity) of the substrate. Further, 80% of the long-range water-substrate interactions are screened by the graphene monolayer, the wettability of which is primarily determined by short-range graphene-liquid interactions. By its well-defined chemical and geometrical properties, supported graphene therefore provides a model system to elucidate the relative contribution of short and long range interactions to the macroscopic contact angle. PMID:27072195

  14. Partial stabilization-based guidance.

    PubMed

    Shafiei, M H; Binazadeh, T

    2012-01-01

    A novel nonlinear missile guidance law against maneuvering targets is designed based on the principles of partial stability. It is demonstrated that in a real approach which is adopted with actual situations, each state of the guidance system must have a special behavior and asymptotic stability or exponential stability of all states is not realistic. Thus, a new guidance law is developed based on the partial stability theorem in such a way that the behaviors of states in the closed-loop system are in conformity with a real guidance scenario that leads to collision. The performance of the proposed guidance law in terms of interception time and control effort is compared with the sliding mode guidance law by means of numerical simulations.

  15. Wettability of partially suspended graphene

    DOE PAGESBeta

    Ondarçuhu, Thierry; Thomas, Vincent; Nuñez, Marc; Dujardin, Erik; Rahman, Atikur; Black, Charles T.; Checco, Antonio

    2016-04-13

    Dependence on the wettability of graphene on the nature of the underlying substrate remains only partially understood. We systematically investigate the role of liquid-substrate interactions on the wettability of graphene by varying the area fraction of suspended graphene from 0 to 95% by means of nanotextured substrates. We find that completely suspended graphene exhibits the highest water contact angle (85° ± 5°) compared to partially suspended or supported graphene, regardless of the hydrophobicity (hydrophilicity) of the substrate. Moreover, 80% of the long-range water-substrate interactions are screened by the graphene monolayer, the wettability of which is primarily determined by short-range graphene-liquidmore » interactions. By its well-defined chemical and geometrical properties, supported graphene therefore provides a model system to elucidate the relative contribution of short and long range interactions to the macroscopic contact angle.« less

  16. Partial coalescence of soap bubbles

    NASA Astrophysics Data System (ADS)

    Harris, Daniel M.; Pucci, Giuseppe; Bush, John W. M.

    2015-11-01

    We present the results of an experimental investigation of the merger of a soap bubble with a planar soap film. When gently deposited onto a horizontal film, a bubble may interact with the underlying film in such a way as to decrease in size, leaving behind a smaller daughter bubble with approximately half the radius of its progenitor. The process repeats up to three times, with each partial coalescence event occurring over a time scale comparable to the inertial-capillary time. Our results are compared to the recent numerical simulations of Martin and Blanchette and to the coalescence cascade of droplets on a fluid bath.

  17. Partial coalescence of soap bubbles

    NASA Astrophysics Data System (ADS)

    Pucci, G.; Harris, D. M.; Bush, J. W. M.

    2015-06-01

    We present the results of an experimental investigation of the merger of a soap bubble with a planar soap film. When gently deposited onto a horizontal film, a bubble may interact with the underlying film in such a way as to decrease in size, leaving behind a smaller daughter bubble with approximately half the radius of its progenitor. The process repeats up to three times, with each partial coalescence event occurring over a time scale comparable to the inertial-capillary time. Our results are compared to the recent numerical simulations of Martin and Blanchette ["Simulations of surfactant effects on the dynamics of coalescing drops and bubbles," Phys. Fluids 27, 012103 (2015)] and to the coalescence cascade of droplets on a fluid bath.

  18. Partial Return Yoke for MICE

    SciTech Connect

    Witte H.; Plate, S

    2013-05-03

    The international Muon Ionization Cooling Experiment (MICE) is a large scale experiment which is presently assembled at the Rutherford Appleton Laboratory in Didcot, UK. The purpose of MICE is to demonstrate the concept of ionization cooling experimentally. Ionization cooling is an important accelerator concept which will be essential for future HEP experiments such as a potential Muon Collider or a Neutrino Factory. The MICE experiment will house up to 18 superconducting solenoids, all of which produce a substantial amount of magnetic flux. Recently it was realized that this magnetic flux leads to a considerable stray magnetic field in the MICE hall. This is a concern as technical equipment in the MICE hall may may be compromised by this. In July 2012 a concept called partial return yoke was presented to the MICE community, which reduces the stray field in the MICE hall to a safe level. This report summarizes the general concept, engineering considerations and the expected shielding performance.

  19. Compatibility and Conjugacy on Partial Arrays

    PubMed Central

    Sasikala, K.

    2016-01-01

    Research in combinatorics on words goes back a century. Berstel and Boasson introduced the partial words in the context of gene comparison. Alignment of two genes can be viewed as a construction of two partial words that are said to be compatible. In this paper, we examine to which extent the fundamental properties of partial words such as compatbility and conjugacy remain true for partial arrays. This paper studies a relaxation of the compatibility relation called k-compability. It also studies k-conjugacy of partial arrays. PMID:27774111

  20. Intersexual partial diploids of phycomyces.

    PubMed Central

    Mehta, B J; Cerdá-Olmedo, E

    2001-01-01

    Sexual interaction between strains of opposite sex in many fungi of the order Mucorales modifies hyphal morphology and increases the carotene content. The progeny of crosses of Phycomyces blakesleeanus usually include a small proportion of anomalous segregants that show these signs of sexual stimulation without a partner. We have analyzed the genetic constitution of such segregants from crosses that involved a carF mutation for overaccumulation of beta-carotene and other markers. The new strains were diploids or partial diploids heterozygous for the sex markers. Diploidy was unknown in this fungus and in the Zygomycetes. Random chromosome losses during the vegetative growth of the diploid led to heterokaryosis in the coenocytic mycelia and eventually to sectors of various tints and mating behavior. The changes in the nuclear composition of the mycelia could be followed by selecting for individual nuclei. The results impose a reinterpretation of the sexual cycle of Phycomyces. Some of the intersexual strains that carried the carF mutation contained 25 mg beta-carotene per gram of dry mass and were sufficiently stable for practical use in carotene production. PMID:11404328

  1. GLSMs for partial flag manifolds

    NASA Astrophysics Data System (ADS)

    Donagi, Ron; Sharpe, Eric

    2008-12-01

    In this paper we outline some aspects of nonabelian gauged linear sigma models. First, we review how partial flag manifolds (generalizing Grassmannians) are described physically by nonabelian gauged linear sigma models, paying attention to realizations of tangent bundles and other aspects pertinent to (0, 2) models. Second, we review constructions of Calabi-Yau complete intersections within such flag manifolds, and properties of the gauged linear sigma models. We discuss a number of examples of nonabelian GLSMs in which the Kähler phases are not birational, and in which at least one phase is realized in some fashion other than as a complete intersection, extending previous work of Hori-Tong. We also review an example of an abelian GLSM exhibiting the same phenomenon. We tentatively identify the mathematical relationship between such non-birational phases, as examples of Kuznetsov's homological projective duality. Finally, we discuss linear sigma model moduli spaces in these gauged linear sigma models. We argue that the moduli spaces being realized physically by these GLSMs are precisely Quot and hyperquot schemes, as one would expect mathematically.

  2. fsi zebrafish show concordant reversal of laterality of viscera, neuroanatomy, and a subset of behavioral responses.

    PubMed

    Barth, K Anukampa; Miklosi, Adam; Watkins, Jenny; Bianco, Isaac H; Wilson, Stephen W; Andrew, Richard J

    2005-05-10

    Asymmetries in CNS neuroanatomy are assumed to underlie the widespread cognitive and behavioral asymmetries in vertebrates. Studies in humans have shown that the laterality of some cognitive asymmetries is independent of the laterality of the viscera; discrete mechanisms may therefore regulate visceral and neural lateralization. However, through analysis of visceral, neuroanatomical, and behavioral asymmetries in the frequent-situs-inversus (fsi) line of zebrafish, we show that the principal left-right body asymmetries are coupled to certain brain asymmetries and lateralized behaviors. fsi fish with asymmetry defects show concordant reversal of heart, gut, and neuroanatomical asymmetries in the diencephalon. Moreover, the neuroanatomical reversals in reversed fsi fish correlate with reversal of some behavioral responses in both fry and adult fsi fish. Surprisingly, two behavioral asymmetries do not reverse, suggesting that at least two separable mechanisms must influence functional lateralization in the CNS. Partial reversal of CNS asymmetries may generate new behavioral phenotypes; supporting this idea, reversed fsi fry differ markedly from their normally lateralized siblings in their behavioral response to a novel visual feature. Revealing a link between visceral and brain asymmetry and lateralized behavior, our studies help to explain the complexity of the relationship between the lateralities of visceral and neural asymmetries.

  3. [Ultrastructure of immotile spermatozoa obtained from infertile male patients].

    PubMed

    Okada, H; Hayashi, A; Tanaka, H; Fujisawa, M; Matsumoto, O; Kamidono, S; Ohya, K

    1993-10-01

    We sometimes experienced infertile patients whose sperms had no motility but were not stained by Eosin Y. In this paper we report five cases of so-called "immotile spermatozoa". The ultrastructure of sperm tails was examined by transmission electrone microscope (TEM). These cases were selected from the out-patient population who attended infertility clinic of our department. The semen analyses showed that all the cases had sperm motility below 1% and more than 90% of the spermatozoa were proven alive. Family history revealed that one case had an infertile sibling. None of them had situs inversus, bronchiectasis and chronic sinusitis which are classic trias of Kartagener's syndrome. They had no symptoms of upper respiratory tract infection which was caused by the abnormality in the flagella of the respiratory tract. The TEM pictures of sperm tails showed partial deletion of inner dynein arms in two cases, lack of central microtubular doublets (so-called 9 + 0) in two cases and disarrangement of microtubular doublets in one case. For the treatment of these cases there is no effective means but AID. However, the rapid progress of IVF-ET techniques and a report that the spermatozoa from Kartagener's syndrome had showed penetration into eggs encouraged us to think the micromanipulation of spermatozoa with IVF-ET as a hopeful option of the treatment in the near future.

  4. 20% PARTIAL SIBERIAN SNAKE IN THE AGS.

    SciTech Connect

    Huang, H; Bai, M; Brown, K A; Glenn, W; Luccio, A U; Mackay, W W; Montag, C; Ptitsyn, V; Roser, T; Tsoupas, N; Zeno, K; Ranjbar, V; Spinka, H; Underwood, D

    2002-11-06

    An 11.4% partial Siberian snake was used to successfully accelerate polarized proton through a strong intrinsic depolarizing spin resonance in the AGS. No noticeable depolarization was observed. This opens up the possibility of using a 20% to 30% partial Siberian snake in the AGS to overcome all weak and strong depolarizing spin resonances. Some design and operation issues of the new partial Siberian snake are discussed.

  5. Quantum states with strong positive partial transpose

    SciTech Connect

    Chruscinski, Dariusz; Jurkowski, Jacek; Kossakowski, Andrzej

    2008-02-15

    We construct a large class of bipartite M x N quantum states which defines a proper subset of states with positive partial transposes (PPTs). Any state from this class has PPT but the positivity of its partial transposition is recognized with respect to canonical factorization of the original density operator. We propose to call elements from this class states with strong positive partial transposes (SPPTs). We conjecture that all SPPT states are separable.

  6. Partially entangled states bridge in quantum teleportation

    NASA Astrophysics Data System (ADS)

    Cai, Xiao-Fei; Yu, Xu-Tao; Shi, Li-Hui; Zhang, Zai-Chen

    2014-10-01

    The traditional method for information transfer in a quantum communication system using partially entangled state resource is quantum distillation or direct teleportation. In order to reduce the waiting time cost in hop-by-hop transmission and execute independently in each node, we propose a quantum bridging method with partially entangled states to teleport quantum states from source node to destination node. We also prove that the designed specific quantum bridging circuit is feasible for partially entangled states teleportation across multiple intermediate nodes. Compared to two traditional ways, our partially entanglement quantum bridging method uses simpler logic gates, has better security, and can be used in less quantum resource situation.

  7. [The insula in partial epilepsy].

    PubMed

    Isnard, J; Mauguière, F

    2005-01-01

    The role of the insular lobe in temporal lobe epilepsy (TLE) has often been suggested but never directly demonstrated. In this article, we review data from recent literature and from our stereo-electroencephalographic (SEEG) recordings in patients referred for temporal lobe epilepsy surgery (TLE). Our description of the clinical features of insular lobe seizures is based on data from video and SEEG ictal recordings and direct electric cortical stimulation in a population of 50 consecutive patients whose seizures, on the basis of scalp video EEG recordings, were suspected to originate from, or to rapidly propagate to, the peri-sylvian cortex. A total of 144 intra-insular electrodes have been implanted in this series of patients. In six patients a stereotyped sequence of ictal symptoms could be identified on the basis of electro-clinical correlations. The clinical presentation of insular lobe seizures was that of simple partial seizures occurring in full consciousness, beginning with a sensation of laryngeal constriction followed by paresthesiae that were often unpleasant affecting large cutaneous territories. These initial symptoms were eventually followed by dysarthric speech and/or elementary auditory hallucinations, and seizures often ended with focal dystonic postures. The insular origin of these symptoms was supported by the data from functional cortical mapping of the insula using direct cortical stimulations. We were able to reproduce several of the spontaneous ictal symptoms in the six patients with insular seizures. Moreover, from the whole set of insular stimulations that we performed it could be concluded that the insular cortex is involved in somatic, vegetative and visceral functions to which spontaneous ictal insular symptoms are related. The observation of the insular symptoms sequence at the onset of seizures in patients who are candidates for TLE surgery strongly suggests that the epileptic focus is located in the insular lobe. It entails the risk

  8. [Laparoscopic partial nephrectomy: technique and outcomes].

    PubMed

    Colombo, J R; Gill, I S

    2006-05-01

    The indication of laparoscopic partial nephrectomy (LPN) has evolved considerably, and the technique is approaching established status at our institution. Over the past 5 years, the senior author has performed more than 450 laparoscopic partial nephrectomies at the Cleveland Clinic. Herein we present our current technique, review contemporary data and oncological outcomes of LPN.

  9. 49 CFR 234.106 - Partial activation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS, AND... Grade Crossings § 234.106 Partial activation. Upon receipt of a credible report of a partial activation... to warn highway users and railroad employees at the subject crossing in the same manner as...

  10. 49 CFR 234.106 - Partial activation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS, AND... Grade Crossings § 234.106 Partial activation. Upon receipt of a credible report of a partial activation... to warn highway users and railroad employees at the subject crossing in the same manner as...

  11. 49 CFR 234.106 - Partial activation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS, AND... Grade Crossings § 234.106 Partial activation. Upon receipt of a credible report of a partial activation... to warn highway users and railroad employees at the subject crossing in the same manner as...

  12. 47 CFR 5.69 - Partial grants.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Partial grants. 5.69 Section 5.69...) Applications and Licenses § 5.69 Partial grants. In cases in which the Commission grants an application in part... interference that may result to a station if designated application or applications are subsequently...

  13. Evaluating Models for Partially Clustered Designs

    ERIC Educational Resources Information Center

    Baldwin, Scott A.; Bauer, Daniel J.; Stice, Eric; Rohde, Paul

    2011-01-01

    Partially clustered designs, where clustering occurs in some conditions and not others, are common in psychology, particularly in prevention and intervention trials. This article reports results from a simulation comparing 5 approaches to analyzing partially clustered data, including Type I errors, parameter bias, efficiency, and power. Results…

  14. Exploring Partial Order of European Countries

    ERIC Educational Resources Information Center

    Annoni, Paola; Bruggemann, Rainer

    2009-01-01

    Partial Order Theory has been recently more and more employed in applied science to overcome the intrinsic disadvantage hidden in aggregation, if a multiple attribute system is available. Despite its numerous positive features, there are many practical cases where the interpretation of the partial order can be rather troublesome. In these cases…

  15. Partially Observed Mixtures of IRT Models: An Extension of the Generalized Partial-Credit Model

    ERIC Educational Resources Information Center

    Von Davier, Matthias; Yamamoto, Kentaro

    2004-01-01

    The generalized partial-credit model (GPCM) is used frequently in educational testing and in large-scale assessments for analyzing polytomous data. Special cases of the generalized partial-credit model are the partial-credit model--or Rasch model for ordinal data--and the two parameter logistic (2PL) model. This article extends the GPCM to the…

  16. Partial nephrectomy: an option in calculus disease?

    PubMed

    Timoney, A G; Payne, S R; Walmsley, B H; Vinnicombe, J; Abercrombie, G F

    1988-12-01

    Thirty-seven patients treated by partial nephrectomy for calculus disease between 1971 and 1986 were reviewed retrospectively. Of the 25 patients available for analysis, 20% developed immediate surgical complications, 20% had residual post-operative stone and 33% developed true ipsilateral stone recurrence during the period of follow-up. Our results from partial nephrectomy for calculus disease are compared with the results of treatment by percutaneous nephrolithotomy and extracorporeal shockwave lithotripsy. It was concluded that partial nephrectomy should be reserved for situations where stone disease is associated with anatomical abnormalities which cannot be treated by the newer modalities of stone management.

  17. Method for partially coating laser diode facets

    NASA Technical Reports Server (NTRS)

    Dholakia, Anil R. (Inventor)

    1990-01-01

    Bars of integral laser diode devices cleaved from a wafer are placed with their p regions abutting and n regions abutting. A thin BeCu mask having alternate openings and strips of the same width as the end facets is used to mask the n region interfaces so that multiple bars can be partially coated over their exposed p regions with a reflective or partial reflective coating. The partial coating permits identification of the emitting facet from the fully coated back facet during a later device mounting procedure.

  18. Partially coherent contrast-transfer-function approximation.

    PubMed

    Nesterets, Yakov I; Gureyev, Timur E

    2016-04-01

    The contrast-transfer-function (CTF) approximation, widely used in various phase-contrast imaging techniques, is revisited. CTF validity conditions are extended to a wide class of strongly absorbing and refracting objects, as well as to nonuniform partially coherent incident illumination. Partially coherent free-space propagators, describing amplitude and phase in-line contrast, are introduced and their properties are investigated. The present results are relevant to the design of imaging experiments with partially coherent sources, as well as to the analysis and interpretation of the corresponding images. PMID:27140752

  19. Fluctuation theorem for partially masked nonequilibrium dynamics.

    PubMed

    Shiraishi, Naoto; Sagawa, Takahiro

    2015-01-01

    We establish a generalization of the fluctuation theorem for partially masked nonequilibrium dynamics. We introduce a partial entropy production with a subset of all possible transitions, and show that the partial entropy production satisfies the integral fluctuation theorem. Our result reveals the fundamental properties of a broad class of autonomous as well as nonautonomous nanomachines. In particular, our result gives a unified fluctuation theorem for both autonomous and nonautonomous Maxwell's demons, where mutual information plays a crucial role. Furthermore, we derive a fluctuation-dissipation theorem that relates nonequilibrium stationary current to two kinds of equilibrium fluctuations. PMID:25679593

  20. Fluctuation theorem for partially masked nonequilibrium dynamics

    NASA Astrophysics Data System (ADS)

    Shiraishi, Naoto; Sagawa, Takahiro

    2015-01-01

    We establish a generalization of the fluctuation theorem for partially masked nonequilibrium dynamics. We introduce a partial entropy production with a subset of all possible transitions, and show that the partial entropy production satisfies the integral fluctuation theorem. Our result reveals the fundamental properties of a broad class of autonomous as well as nonautonomous nanomachines. In particular, our result gives a unified fluctuation theorem for both autonomous and nonautonomous Maxwell's demons, where mutual information plays a crucial role. Furthermore, we derive a fluctuation-dissipation theorem that relates nonequilibrium stationary current to two kinds of equilibrium fluctuations.

  1. Complex partial status epilepticus: a recurrent problem.

    PubMed Central

    Cockerell, O C; Walker, M C; Sander, J W; Shorvon, S D

    1994-01-01

    Twenty patients with complex partial status epilepticus were identified retrospectively from a specialist neurology hospital. Seventeen patients experienced recurrent episodes of complex partial status epilepticus, often occurring at regular intervals, usually over many years, and while being treated with effective anti-epileptic drugs. No unifying cause for the recurrences, and no common epilepsy aetiologies, were identified. In spite of the frequency of recurrence and length of history, none of the patients showed any marked evidence of cognitive or neurological deterioration. Complex partial status epilepticus is more common than is generally recognised, should be differentiated from other forms of non-convulsive status, and is often difficult to treat. PMID:8021671

  2. Manifest duality for partially massless higher spins

    NASA Astrophysics Data System (ADS)

    Hinterbichler, Kurt; Joyce, Austin

    2016-09-01

    In four dimensions, partially massless fields of all spins and depths possess a duality invariance akin to electric-magnetic duality. We construct metric-like gauge invariant curvature tensors for partially massless fields of all integer spins and depths, and show how the partially massless equations of motion can be recovered from first order field equations and Bianchi identities for these curvatures. This formulation displays duality in its manifestly local and covariant form, in which it acts to interchange the field equations and Bianchi identities.

  3. Circulant states with positive partial transpose

    SciTech Connect

    Chruscinski, Dariusz; Kossakowski, Andrzej

    2007-09-15

    We construct a large class of quantum dxd states which are positive under partial transposition (so called PPT states). The construction is based on certain direct sum decomposition of the total Hilbert space displaying characteristic circular structure - that is why we call them circulant states. It turns out that partial transposition maps any such decomposition into another one and hence both original density matrix and its partially transposed partner share similar cyclic properties. This class contains many well-known examples of PPT states from the literature and gives rise to a huge family of completely new states.

  4. Prolonged partial epilepsy: a case report

    SciTech Connect

    Wilson, M.A.

    1980-11-01

    The case study of a patient with prolonged partial epilepsy is presented. There was a discrepancy between the extent of the abnormality seen on the radionuclide angiogram and that seen on the static brain scan.

  5. Partial ASL extensions for stochastic programming.

    SciTech Connect

    Gay, David

    2010-03-31

    partially completed extensions for stochastic programming to the AMPL/solver interface library (ASL).modeling and experimenting with stochastic recourse problems. This software is not primarily for military applications

  6. Clustering stocks using partial correlation coefficients

    NASA Astrophysics Data System (ADS)

    Jung, Sean S.; Chang, Woojin

    2016-11-01

    A partial correlation analysis is performed on the Korean stock market (KOSPI). The difference between Pearson correlation and the partial correlation is analyzed and it is found that when conditioned on the market return, Pearson correlation coefficients are generally greater than those of the partial correlation, which implies that the market return tends to drive up the correlation between stock returns. A clustering analysis is then performed to study the market structure given by the partial correlation analysis and the members of the clusters are compared with the Global Industry Classification Standard (GICS). The initial hypothesis is that the firms in the same GICS sector are clustered together since they are in a similar business and environment. However, the result is inconsistent with the hypothesis and most clusters are a mix of multiple sectors suggesting that the traditional approach of using sectors to determine the proximity between stocks may not be sufficient enough to diversify a portfolio.

  7. Electrogenerative partial oxidation of organic compounds

    SciTech Connect

    Stafford, G.R.

    1984-05-22

    This invention provides an electrochemical process for electrogenerative partial oxidation of methyl-substituted hydrocarbons such as ethane, propylene and toluene. Ethane is oxidized to products such as acetaldehyde and acetic acid, and propylene converts to acrolein and acrylic acid.

  8. Partial nephrectomy in a patient with dwarfism.

    PubMed

    Farber, Nicholas J; Dubin, Justin; Parihar, Jaspreet; Han, Chris; Lasser, Michael S

    2016-08-01

    We describe the case of a 50-year-old male with achondroplastic dwarfism who presents with a renal mass in his left kidney concerning for renal cell carcinoma. The patient successfully underwent a robotic partial nephrectomy, which revealed a T1a renal cell carcinoma. The tumor was excised successfully without any intraoperative complications demonstrating that a robotic partial nephrectomy is technically both safe and effective in patients with achondroplastic dwarfism. PMID:27544562

  9. Coherent diffractive imaging and partial coherence

    NASA Astrophysics Data System (ADS)

    Williams, Garth J.; Quiney, Harry M.; Peele, Andrew G.; Nugent, Keith A.

    2007-03-01

    We formulate coherent diffractive imaging in the framework of partially spatially coherent diffraction. We find that the reconstruction can be critically dependent on the degree of coherence in the illuminating field and that even a small departure from full coherence may invalidate the conventional assumption that a mapping exists between an exit surface wave of finite support and a far field diffraction pattern. We demonstrate that the introduction of sufficient phase curvature in the illumination can overcome the adverse effects of partial coherence.

  10. Free fall - A partial unique motion environment

    NASA Technical Reports Server (NTRS)

    Graybiel, A.

    1980-01-01

    Conditions leading to the elicitation of motion sickness have been divided into two main categories: partial motion environments, in which head movements are required to elicit motion sickness, and complete motion environments, in which independent movements of the head are not required for the production of symptoms. It is postulated that, according to this categorization, free fall constitutes a partial motion environment. In support of this hypothesis evidence is reviewed from Skylab missions, experiments in parabolic flight, and ground-based studies.

  11. Gingival enlargement in partial hemifacial hyperplasia.

    PubMed

    Jagtap, Rasika Ravindra; Deshpande, Gaurav Shekhar

    2014-01-01

    Hemifacial hypertrophy is a rare developmental disorder, characterized by unilateral enlargement of facial tissues. The hemifacial hyperplasia is classified as true hemifacial hypertrophy and partial hemifacial hypertrophy. It is unilateral enlargement of viscerocranial condition in which not all structures are enlarged. We present a rare case of gingival enlargement in partial hemifacial hyperplasia highlighting the clinical and radiological findings with the corrective treatment offered for gingival enlargement.

  12. Combatting the "partial-birth abortion" myth.

    PubMed

    1998-11-01

    Despite the efforts of pro-choice activists in the US to point out the critical differences between so-called "partial-birth abortions" and late-term abortions, the public remains confused about the issue. Proposed federal legislation banning "partial-birth abortions" excludes any language defining late-term abortions (time period or fetal viability). Thus, such a ban would apply to any abortion at any stage of pregnancy. Only the states of Kansas and Utah have passed legislation that limit the ban to late-term abortions. The term "partial-birth abortion" also has no independent meaning: it is not a medical term nor does it refer to a medical procedure. The correct term, "intact dilation and extraction," is never mentioned in most proposed legislation, much of which is written in broad enough language to outlaw all abortions. Most states that passed bans on "partial-birth abortions," in fact, had previously banned late-term abortions. In Georgia, a court order revised a "partial-birth abortion" law by limiting it to post-viability dilation and extraction and insisting on exceptions to protect the pregnant women's life and health. The courts have severely limited or enjoined "partial-birth abortion" legislation in 19 of the 20 states where challenges were mounted. Because an educated public overwhelmingly rejects the bans, reproductive rights activists are attempting to educate the public despite the inability or unwillingness of the media to make the crucial distinction. PMID:12294330

  13. Combatting the "partial-birth abortion" myth.

    PubMed

    1998-11-01

    Despite the efforts of pro-choice activists in the US to point out the critical differences between so-called "partial-birth abortions" and late-term abortions, the public remains confused about the issue. Proposed federal legislation banning "partial-birth abortions" excludes any language defining late-term abortions (time period or fetal viability). Thus, such a ban would apply to any abortion at any stage of pregnancy. Only the states of Kansas and Utah have passed legislation that limit the ban to late-term abortions. The term "partial-birth abortion" also has no independent meaning: it is not a medical term nor does it refer to a medical procedure. The correct term, "intact dilation and extraction," is never mentioned in most proposed legislation, much of which is written in broad enough language to outlaw all abortions. Most states that passed bans on "partial-birth abortions," in fact, had previously banned late-term abortions. In Georgia, a court order revised a "partial-birth abortion" law by limiting it to post-viability dilation and extraction and insisting on exceptions to protect the pregnant women's life and health. The courts have severely limited or enjoined "partial-birth abortion" legislation in 19 of the 20 states where challenges were mounted. Because an educated public overwhelmingly rejects the bans, reproductive rights activists are attempting to educate the public despite the inability or unwillingness of the media to make the crucial distinction.

  14. Spreading paths in partially observed social networks

    NASA Astrophysics Data System (ADS)

    Onnela, Jukka-Pekka; Christakis, Nicholas A.

    2012-03-01

    Understanding how and how far information, behaviors, or pathogens spread in social networks is an important problem, having implications for both predicting the size of epidemics, as well as for planning effective interventions. There are, however, two main challenges for inferring spreading paths in real-world networks. One is the practical difficulty of observing a dynamic process on a network, and the other is the typical constraint of only partially observing a network. Using static, structurally realistic social networks as platforms for simulations, we juxtapose three distinct paths: (1) the stochastic path taken by a simulated spreading process from source to target; (2) the topologically shortest path in the fully observed network, and hence the single most likely stochastic path, between the two nodes; and (3) the topologically shortest path in a partially observed network. In a sampled network, how closely does the partially observed shortest path (3) emulate the unobserved spreading path (1)? Although partial observation inflates the length of the shortest path, the stochastic nature of the spreading process also frequently derails the dynamic path from the shortest path. We find that the partially observed shortest path does not necessarily give an inflated estimate of the length of the process path; in fact, partial observation may, counterintuitively, make the path seem shorter than it actually is.

  15. Origin and course of the coronary arteries in normal mice and in iv/iv mice

    PubMed Central

    ICARDO, JOSÉ M.; COLVEE, ELVIRA

    2001-01-01

    This paper reports on the origin and distribution of the coronary arteries in normal mice and in mice of the iv/iv strain, which show situs inversus and heterotaxia. The coronary arteries were studied by direct observation of the aortic sinuses with the scanning electron microscope, and by examination of vascular corrosion casts. In the normal mouse, the left and right coronaries (LC, RC) arise from the respective Valsalva sinus and course along the ventricular borders to reach the heart apex. Along this course the coronary arteries give off small branches at perpendicular or acute angles to supply the ventricles. The ventricular septum is supplied by the septal artery, which arises as a main branch from the right coronary. Conus arteries arise from the main coronary trunks, from the septal artery and/or directly from the Valsalva sinus. The vascular casts demonstrate the presence of intercoronary anastomoses. The origin of the coronary arteries was found to be abnormal in 84% of the iv/iv mice. These anomalies included double origin, high take-off, slit-like openings and the presence of a single coronary orifice. These anomalies occurred singly or in any combination, and were independent of heart situs. The septal artery originated from RC in most cases of situs solitus but originated predominantly from LC in situs inversus hearts. Except for this anomalous origin no statistical correlation was found between the coronary anomalies and heart situs or a particular mode of heterotaxia. The coronary anomalies observed in the iv/iv mice are similar to those found in human hearts. Most coronary anomalies appear to be due to defective connections between the aortic root and the developing coronaries. iv/iv mice may therefore constitute a good model to study the development of similar anomalies in the human heart. PMID:11693308

  16. Incremental fusion of partial biometric information

    NASA Astrophysics Data System (ADS)

    Abboud, Ali J.; Jassim, Sabah A.

    2012-06-01

    Existing face recognition schemes are mostly based on extracting biometric feature vectors either from whole face images, or from a fixed facial region (e.g., eyes, nose, and mouth). Extreme variation in quality conditions between biometric enrolment and verification stages badly affects the performance of face recognition systems. Such problems have partly motivated several investigations into the use of partial facial features for face recognition. Nevertheless, partial face recognition is potentially useful in several applications, for instance, it used in forensics for detectives to identify individuals after some accidents such as fire or explosion. In this paper, we propose a scheme to fuse the biometric information of partial face images incrementally based on their recognition accuracy (or discriminative power) ranks. Such fusion scheme uses the optimal ratio of full/partial face images in each different quality condition. We found that such scheme is also useful for full face images to enhance authentication accuracy significantly. Nevertheless, it reduces the required storage requirements and processing time of the biometric system. Our experiments show that the required ratio of full/partial facial images to achieve optimal performance varies from (5%) to (80%) according to the quality conditions whereas the authentication accuracy improves significantly for low quality biometric samples.

  17. Telecloning of qudits via partially entangled states

    NASA Astrophysics Data System (ADS)

    Araneda, Gabriel; Cisternas, Nataly; Delgado, Aldo

    2016-08-01

    We study the process of quantum telecloning of d-dimensional pure quantum states using partially entangled pure states as quantum channel. This process efficiently mixes optimal universal symmetric cloning with quantum teleportation. It is shown that it is possible to implement universal symmetric telecloning in a probabilistic way using unambiguous state discrimination and quantum state separation schemes. It is also shown that other strategies, such as minimum error discrimination, lead to a decrease in the fidelity of the copies and that certain partially entangled pure states with maximal Schmidt rank lead to an average telecloning fidelity which is always above the optimal fidelity of measuring and preparation of quantum states. We also discuss the case of partially entangled pure states with non-maximal Schmidt rank. The results presented here are valid for arbitrary numbers of copies of a single-input qudit state of any dimension.

  18. Thin film oxygen partial pressure sensor

    NASA Technical Reports Server (NTRS)

    Wortman, J. J.; Harrison, J. W.; Honbarrier, H. L.; Yen, J.

    1972-01-01

    The development is described of a laboratory model oxygen partial pressure sensor using a sputtered zinc oxide thin film. The film is operated at about 400 C through the use of a miniature silicon bar. Because of the unique resistance versus temperature relation of the silicon bar, control of the operational temperature is achieved by controlling the resistance. A circuit for accomplishing this is described. The response of sputtered zinc oxide films of various thicknesses to oxygen, nitrogen, argon, carbon dioxide, and water vapor caused a change in the film resistance. Over a large range, film conductance varied approximately as the square root of the oxygen partial pressure. The presence of water vapor in the gas stream caused a shift in the film conductance at a given oxygen partial pressure. A theoretical model is presented to explain the characteristic features of the zinc oxide response to oxygen.

  19. Partial connectivity increases cultural accumulation within groups.

    PubMed

    Derex, Maxime; Boyd, Robert

    2016-03-15

    Complex technologies used in most human societies are beyond the inventive capacities of individuals. Instead, they result from a cumulative process in which innovations are gradually added to existing cultural traits across many generations. Recent work suggests that a population's ability to develop complex technologies is positively affected by its size and connectedness. Here, we present a simple computer-based experiment that compares the accumulation of innovations by fully and partially connected groups of the same size in a complex fitness landscape. We find that the propensity to learn from successful individuals drastically reduces cultural diversity within fully connected groups. In comparison, partially connected groups produce more diverse solutions, and this diversity allows them to develop complex solutions that are never produced in fully connected groups. These results suggest that explanations of ancestral patterns of cultural complexity may need to consider levels of population fragmentation and interaction patterns between partially isolated groups. PMID:26929364

  20. Robotic partial nephrectomy: current technique and outcomes.

    PubMed

    Wang, Liang; Lee, Benjamin R

    2013-09-01

    Over the past decade, management of the T1 renal mass has focused on nephron-sparing surgery. Robotic partial nephrectomy has played an increasing role in the technique of preserving renal function by decreasing warm ischemia time, as well as optimizing outcomes of hemorrhage and fistula. Robot-assisted partial nephrectomy is designed to provide a minimally-invasive nephron-sparing surgical option utilizing reconstructive capability, decreasing intracorporeal suturing time, technical feasibility and safety. Ultimately, its benefits are resulting in its dissemination across institutions. Articulated instrumentation and three-dimensional vision facilitate resection, collecting system reconstruction and renorrhaphy, leading to decreased warm ischemia time while preserving oncological outcomes. The aim of the present review was to present our surgical sequence and technique, as well as review the current status of robot-assisted partial nephrectomy.

  1. Partial connectivity increases cultural accumulation within groups

    PubMed Central

    Boyd, Robert

    2016-01-01

    Complex technologies used in most human societies are beyond the inventive capacities of individuals. Instead, they result from a cumulative process in which innovations are gradually added to existing cultural traits across many generations. Recent work suggests that a population’s ability to develop complex technologies is positively affected by its size and connectedness. Here, we present a simple computer-based experiment that compares the accumulation of innovations by fully and partially connected groups of the same size in a complex fitness landscape. We find that the propensity to learn from successful individuals drastically reduces cultural diversity within fully connected groups. In comparison, partially connected groups produce more diverse solutions, and this diversity allows them to develop complex solutions that are never produced in fully connected groups. These results suggest that explanations of ancestral patterns of cultural complexity may need to consider levels of population fragmentation and interaction patterns between partially isolated groups. PMID:26929364

  2. Diffraction imaging: The limits of partial coherence

    NASA Astrophysics Data System (ADS)

    Chen, Bo; Abbey, Brian; Dilanian, Ruben; Balaur, Eugeniu; van Riessen, Grant; Junker, Mark; Tran, Chanh Q.; Jones, Michael W. M.; Peele, Andrew G.; McNulty, Ian; Vine, David J.; Putkunz, Corey T.; Quiney, Harry M.; Nugent, Keith A.

    2012-12-01

    Coherent diffraction imaging (CDI) typically requires that the source should be highly coherent both laterally and longitudinally. In this paper, we demonstrate that lateral and longitudinal partial coherence can be successfully included in a CDI reconstruction algorithm simultaneously using experimental x-ray data. We study the interplay between lateral partial coherence and longitudinal partial coherence and their relative influence on CDI. We compare our results against the coherence criteria published by Spence [Spence , UltramicroscopyULTRD60304-399110.1016/j.ultramic.2004.05.005 101, 149 (2004)] and show that for iterative ab initio phase-recovery algorithms based on those typically used in CDI and in cases where the coherence properties are known, we are able to relax the minimal coherence requirements by a factor of 2 both laterally and longitudinally, potentially yielding significant reduction in exposure time.

  3. Scintillations of partially coherent Laguerre Gaussian beams

    NASA Astrophysics Data System (ADS)

    Yüceer, M.; Eyyuboğlu, H. T.; Lukin, I. P.

    2010-12-01

    Scintillations of Laguerre-Gaussian (LG) beams for weak atmospheric turbulence conditions are derived for on-axis receiver positions by using Huygens-Fresnel (HF) method in semi-analytic fashion. Numerical evaluations indicate that at the fully coherent limit, higher values of radial mode numbers will give rise to more scintillations, at medium and low partial coherence levels, particularly at longer propagation distances, scintillations will fall against rises in radial mode numbers. At small source sizes, the scintillations of LG beams having full coherence will initially rise, reaching saturation at large source sizes. For LG beams with low partial coherence levels, a steady fall toward the larger source sizes is observed. Partially coherent beams of medium levels generally exhibit a rising trend toward the large source sizes, also changing the respective positions of the related curves. Beams of low coherence levels will be less affected by the variations in the refractive index structure constant.

  4. Partial connectivity increases cultural accumulation within groups.

    PubMed

    Derex, Maxime; Boyd, Robert

    2016-03-15

    Complex technologies used in most human societies are beyond the inventive capacities of individuals. Instead, they result from a cumulative process in which innovations are gradually added to existing cultural traits across many generations. Recent work suggests that a population's ability to develop complex technologies is positively affected by its size and connectedness. Here, we present a simple computer-based experiment that compares the accumulation of innovations by fully and partially connected groups of the same size in a complex fitness landscape. We find that the propensity to learn from successful individuals drastically reduces cultural diversity within fully connected groups. In comparison, partially connected groups produce more diverse solutions, and this diversity allows them to develop complex solutions that are never produced in fully connected groups. These results suggest that explanations of ancestral patterns of cultural complexity may need to consider levels of population fragmentation and interaction patterns between partially isolated groups.

  5. Partial Thickness Rotator Cuff Tears: Current Concepts

    PubMed Central

    Matthewson, Graeme; Beach, Cara J.; Nelson, Atiba A.; Woodmass, Jarret M.; Ono, Yohei; Boorman, Richard S.; Lo, Ian K. Y.; Thornton, Gail M.

    2015-01-01

    Partial thickness rotator cuff tears are a common cause of pain in the adult shoulder. Despite their high prevalence, the diagnosis and treatment of partial thickness rotator cuff tears remains controversial. While recent studies have helped to elucidate the anatomy and natural history of disease progression, the optimal treatment, both nonoperative and operative, is unclear. Although the advent of arthroscopy has improved the accuracy of the diagnosis of partial thickness rotator cuff tears, the number of surgical techniques used to repair these tears has also increased. While multiple repair techniques have been described, there is currently no significant clinical evidence supporting more complex surgical techniques over standard rotator cuff repair. Further research is required to determine the clinical indications for surgical and nonsurgical management, when formal rotator cuff repair is specifically indicated and when biologic adjunctive therapy may be utilized. PMID:26171251

  6. On partially massless theory in 3 dimensions

    SciTech Connect

    Alexandrov, Sergei; Deffayet, Cédric

    2015-03-24

    We analyze the first-order formulation of the ghost-free bigravity model in three-dimensions known as zwei-dreibein gravity. For a special choice of parameters, it was argued to have an additional gauge symmetry and give rise to a partially massless theory. We provide a thorough canonical analysis and identify that whether the theory becomes partially massless depends on the form of the stability condition of the secondary constraint responsible for the absence of the ghost. Generically, it is found to be an equation for a Lagrange multiplier implying that partially massless zwei-dreibein gravity does not exist. However, for special backgrounds this condition is identically satisfied leading to the presence of additional symmetries, which however disappear at quadratic order in perturbations.

  7. [Fiber-reinforced adhesive partial dentures].

    PubMed

    Kreulen, C M

    2003-06-01

    Dental applications of fiber-reinforced polymers include adhesive partial dentures. Dental resin composite materials can be reinforced by several types of fibres. Fiber orientation, proper wetting of the fibers by the resin and fiber volume are important. An application of fiber reinforced composites is the composite inlay bridge. This paper deals with some aspects of this type of adhesive partial denture. Advantages include the satisfactory esthetics and the minimally invasive character. Not clear yet is the long-term survival. The adhesive properties of fiber-reinforced adhesive partial dentures require an adaptation of the current dental philosophy, in which direct and indirect restorative techniques can be combined. An increase in knowledge and experience is needed to determine the dental applications. PMID:12852063

  8. Virtual environment application with partial gravity simulation

    NASA Technical Reports Server (NTRS)

    Ray, David M.; Vanchau, Michael N.

    1994-01-01

    To support manned missions to the surface of Mars and missions requiring manipulation of payloads and locomotion in space, a training facility is required to simulate the conditions of both partial and microgravity. A partial gravity simulator (Pogo) which uses pneumatic suspension is being studied for use in virtual reality training. Pogo maintains a constant partial gravity simulation with a variation of simulated body force between 2.2 and 10 percent, depending on the type of locomotion inputs. this paper is based on the concept and application of a virtual environment system with Pogo including a head-mounted display and glove. The reality engine consists of a high end SGI workstation and PC's which drive Pogo's sensors and data acquisition hardware used for tracking and control. The tracking system is a hybrid of magnetic and optical trackers integrated for this application.

  9. Adult case of partial trisomy 9q

    PubMed Central

    2010-01-01

    Background Complete and partial trisomy 9 is the fourth most common chromosomal disorder. It is also associated with various congenital characteristics affecting the cranio-facial, skeletal, central nervous, gastrointestinal, cardiac and renal systems. Very few cases have been reported in adults. Partial trisomy 9q is also associated with short stature, poor growth and growth hormone deficiency. This is the first reported case of an extensive endocrinology investigation of short stature in trisomy 9q and the outcome of growth hormone treatment. Case Presentation The case involves a 23-year-old female of pure partial trisomy 9q. The case involves a 23-year old female with pure partial trisomy 9q involving a duplication of 9q22.1 to q32, de novo, confirmed by genetic studies using fluorescene in situ hybridization (FISH) method. The diagnosis was at 6 years of age. She did not demonstrate all the congenital morphologies identified with trisomy 9q disorders especially in relation to multi-organ morphologies. There is also a degree of associated intellectual impairment. At prepuberty, she was referred for poor growth and was diagnosed with partial growth hormone deficiency. She responded very well to treatment with growth hormone and is currently living an independent life with some support. Conclusions Trisomy 9q is associated with short stature and failure to thrive. Growth hormone deficiency should be identified in cases of trisomy 9q and treatment offered. This is the first reported case of response to growth hormone replacement in partial trisomy 9. PMID:20158889

  10. Digital generation of partially coherent vortex beams.

    PubMed

    Perez-Garcia, Benjamin; Yepiz, Adad; Hernandez-Aranda, Raul I; Forbes, Andrew; Swartzlander, Grover A

    2016-08-01

    We present an experimental technique to generate partially coherent vortex beams with an arbitrary azimuthal index using only a spatial light modulator. Our approach is based on digitally simulating the intrinsic randomness of broadband light passing through a spiral phase plate. We illustrate the versatility of the technique by generating partially coherent beams with different coherence lengths and orbital angular momentum content, without any moving optical device. Consequently, we study its cross-correlation function in a wavefront folding interferometer. The comparison with theoretical predictions yields excellent agreement. PMID:27472596

  11. Partial gravity - Human impacts on facility design

    NASA Technical Reports Server (NTRS)

    Capps, Stephen; Moore, Nathan

    1990-01-01

    Partial gravity affects the body differently than earth gravity and microgravity environments. The main difference from earth gravity is human locomotion; while the main dfference from microgravity is the specific updown orientation and reach envelopes which increase volume requirements. Much data are available on earth gravity and microgravity design; however, very little information is available on human reactions to reduced gravity levels in IVA situations (without pressure suits). Therefore, if humans commit to permanent lunar habitation, much research should be conducted in the area of partial gravity effects on habitat design.

  12. Pheochromocytoma Presenting as Partial HELLP Syndrome.

    PubMed

    Daaboul, Yazan; Korjian, Serge; Khalil, Lamis; Nemr, Rita

    2015-01-01

    Diagnosis of pheochromocytoma in partial HELLP syndrome is extremely rare. We report a case of a 25-year-old multigravida woman at 30 weeks of gestation who presented with clinical features consistent with partial HELLP syndrome. Her symptoms were not controlled by pharmacologic therapy, and the patient underwent urgent cesarean section. The patient gave birth to a viable baby, but she sustained an episode of ventricular fibrillation intraoperatively that did not result in any long-term sequelae. The patient's symptoms persisted postoperatively and work-up for secondary etiologies of hypertension demonstrated a right adrenal pheochromocytoma. Following resection, the patient's signs and symptoms resolved, and her lab tests normalized. PMID:26351602

  13. DEVICE FOR CONTROL OF OXYGEN PARTIAL PRESSURE

    DOEpatents

    Bradner, H.; Gordon, H.S.

    1957-12-24

    A device is described that can sense changes in oxygen partial pressure and cause a corresponding mechanical displacement sufficient to actuate meters, valves and similar devices. A piston and cylinder arrangement contains a charge of crystalline metal chelate pellets which have the peculiar property of responding to variations in the oxygen content of the ambient atmosphere by undergoing a change in dimension. A lever system amplifies the relative displacement of the piston in the cylinder, and actuates the controlled valving device. This partial pressure oxygen sensing device is useful in controlled chemical reactions or in respiratory devices such as the oxygen demand meters for high altitude aircraft.

  14. 77 FR 1417 - Partial Approval and Partial Disapproval of Air Quality Implementation Plans; California; San...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-10

    .... Proposed Action On September 9, 2011 (76 FR 55842), EPA proposed to partially approve and partially... approval/disapproval October 1, 2010 (75 FR 60623). SJVUAPCD is scheduled to adopt amendments to Rule 4352.../disapproval January 26, 2010, (75 FR 3996). SJVUAPCD submitted amendments to EPA on July 28, 2011 and...

  15. Methods for producing partially digested restriction DNA fragments and for producing a partially modified PCR product

    DOEpatents

    Wong, Kwong-Kwok

    2000-01-01

    The present invention is an improved method of making a partially modified PCR product from a DNA fragment with a polymerase chain reaction (PCR). In a standard PCR process, the DNA fragment is combined with starting deoxynucleoside triphosphates, a primer, a buffer and a DNA polymerase in a PCR mixture. The PCR mixture is then reacted in the PCR producing copies of the DNA fragment. The improvement of the present invention is adding an amount of a modifier at any step prior to completion of the PCR process thereby randomly and partially modifying the copies of the DNA fragment as a partially modified PCR product. The partially modified PCR product may then be digested with an enzyme that cuts the partially modified PCR product at unmodified sites thereby producing an array of DNA restriction fragments.

  16. Conservation Development in the Partially Sighted Child.

    ERIC Educational Resources Information Center

    Swanson, Lee; And Others

    1979-01-01

    A comparative study of conservation development in partially sighted, sighted, and sighted blindfolded children at four age levels was assessed. Conservation on tasks of mass, weight, and volume were evaluated using Piaget and Inhelder's prediction, judgment, and explanation questions. The significant differences were found between groups, task,…

  17. Partial spectral analysis of hydrological time series

    NASA Astrophysics Data System (ADS)

    Jukić, D.; Denić-Jukić, V.

    2011-03-01

    SummaryHydrological time series comprise the influences of numerous processes involved in the transfer of water in hydrological cycle. It implies that an ambiguity with respect to the processes encoded in spectral and cross-spectral density functions exists. Previous studies have not paid attention adequately to this issue. Spectral and cross-spectral density functions represent the Fourier transforms of auto-covariance and cross-covariance functions. Using this basic property, the ambiguity is resolved by applying a novel approach based on the spectral representation of partial correlation. Mathematical background for partial spectral density, partial amplitude and partial phase functions is presented. The proposed functions yield the estimates of spectral density, amplitude and phase that are not affected by a controlling process. If an input-output relation is the subject of interest, antecedent and subsequent influences of the controlling process can be distinguished considering the input event as a referent point. The method is used for analyses of the relations between the rainfall, air temperature and relative humidity, as well as the influences of air temperature and relative humidity on the discharge from karst spring. Time series are collected in the catchment of the Jadro Spring located in the Dinaric karst area of Croatia.

  18. Absolute partial photoionization cross sections of ozone.

    SciTech Connect

    Berkowitz, J.; Chemistry

    2008-04-01

    Despite the current concerns about ozone, absolute partial photoionization cross sections for this molecule in the vacuum ultraviolet (valence) region have been unavailable. By eclectic re-evaluation of old/new data and plausible assumptions, such cross sections have been assembled to fill this void.

  19. Partial Hospitalization Programs: A Current Perspective.

    ERIC Educational Resources Information Center

    Whitelaw, Carolyn A.; Perez, Edgardo L.

    1987-01-01

    Reviews the historical background, standards, the issue of day treatment versus day care, functional issues, specialization, efficacy and cost effectiveness, utilization issues, and alternative models of care of partial hospitalization programs in North America. Emphasizes issues of relevance when planning alternative programs to inpatient…

  20. Partially Correct Constructs Illuminate Students' Inconsistent Answers

    ERIC Educational Resources Information Center

    Ron, Gila; Dreyfus, Tommy; Hershkowitz, Rina

    2010-01-01

    We present a view of knowledge construction processes, focusing on partially correct constructs. Motivated by unexpected and seemingly inconsistent quantitative data based on the written reports of students working on an elementary probability task, we analyze in detail the knowledge construction processes of a representative student. We show how…

  1. Partial intravenous anesthesia in cats and dogs.

    PubMed

    Duke, Tanya

    2013-03-01

    The partial intravenous anesthesia technique (PIVA) is used to lower the inspired concentration of an inhalational anesthetic by concurrent use of injectable drugs. This technique reduces the incidence of undesirable side-effects and provides superior quality of anesthesia and analgesia. Drugs commonly used for PIVA include opioids, alpha-2 adrenergic agonists, injectable anesthetic agents, and lidocaine. Most are administered by intravenous infusion.

  2. Partial face recognition: alignment-free approach.

    PubMed

    Liao, Shengcai; Jain, Anil K; Li, Stan Z

    2013-05-01

    Numerous methods have been developed for holistic face recognition with impressive performance. However, few studies have tackled how to recognize an arbitrary patch of a face image. Partial faces frequently appear in unconstrained scenarios, with images captured by surveillance cameras or handheld devices (e.g., mobile phones) in particular. In this paper, we propose a general partial face recognition approach that does not require face alignment by eye coordinates or any other fiducial points. We develop an alignment-free face representation method based on Multi-Keypoint Descriptors (MKD), where the descriptor size of a face is determined by the actual content of the image. In this way, any probe face image, holistic or partial, can be sparsely represented by a large dictionary of gallery descriptors. A new keypoint descriptor called Gabor Ternary Pattern (GTP) is also developed for robust and discriminative face recognition. Experimental results are reported on four public domain face databases (FRGCv2.0, AR, LFW, and PubFig) under both the open-set identification and verification scenarios. Comparisons with two leading commercial face recognition SDKs (PittPatt and FaceVACS) and two baseline algorithms (PCA+LDA and LBP) show that the proposed method, overall, is superior in recognizing both holistic and partial faces without requiring alignment.

  3. A Partial Theory of Executive Succession.

    ERIC Educational Resources Information Center

    Thiemann, Francis C.

    This study has two purposes: (1) To construct a partial theory of succession, and (2) to utilize a method of theory construction which combines some of the concepts of Hans Zetterberg with the principles of formal symbolic logic. A bibliography on succession in complex organizations with entries on descriptive and empirical studies from various…

  4. Dopamine receptor partial agonists and addiction.

    PubMed

    Moreira, Fabricio A; Dalley, Jeffrey W

    2015-04-01

    Many drugs abused by humans acutely facilitate, either directly or indirectly, dopamine neurotransmission in the mesolimbic pathway. As a consequence dopamine receptor agonists and antagonists have been widely investigated as putative pharmacological therapies for addiction. This general strategy, however, has had only limited success due in part to poor treatment adherence and efficacy and the significant adverse effects of dopaminergic medications. In this perspective, we discuss the potential therapeutic use of dopamine receptor partial agonists in addiction, developed initially as antipsychotic agents. Recent research indicates that the dopamine D2 receptor partial agonists, such as aripiprazole, also shows useful ancillary efficacy in several animal models of psychostimulant and opioid addiction. Notably, these findings suggest that unlike full dopamine receptor agonists and antagonists these compounds have low abuse liability and are generally well tolerated. Indeed, partial dopamine agonists attenuate the rewarding properties of opioids without interfering with their analgesic effects. Herein we discuss the utility and potential of dopamine receptor partial agonists as treatments for both stimulant and non-stimulant drug addiction.

  5. PARTIALLY SEEING PROGRAM, 1966-1967.

    ERIC Educational Resources Information Center

    Lake County Special Education District, Gurnee, IL.

    THIS ADMINISTRATIVE OUTLINE OF THE PARTIALLY SEEING PROGRAM IN LAKE COUNTY, ILLINOIS, PRESENTS THE DUTIES AND RESPONSIBILITIES OF THE TWO ITINERANT TEACHERS AND THEIR IMMEDIATE SUPERVISORS. THE PROGRAM'S PHILOSOPHY, GOALS, HISTORY AND PLACEMENT IN THE COUNTY'S ORGANIZATIONAL STRUCTURE IS PRESENTED. THE ITINERANT TEACHER'S ADMINISTRATIVE…

  6. Partial Automated Alignment and Integration System

    NASA Technical Reports Server (NTRS)

    Kelley, Gary Wayne (Inventor)

    2014-01-01

    The present invention is a Partial Automated Alignment and Integration System (PAAIS) used to automate the alignment and integration of space vehicle components. A PAAIS includes ground support apparatuses, a track assembly with a plurality of energy-emitting components and an energy-receiving component containing a plurality of energy-receiving surfaces. Communication components and processors allow communication and feedback through PAAIS.

  7. Partially Decentralized Control Architectures for Satellite Formations

    NASA Technical Reports Server (NTRS)

    Carpenter, J. Russell; Bauer, Frank H.

    2002-01-01

    In a partially decentralized control architecture, more than one but less than all nodes have supervisory capability. This paper describes an approach to choosing the number of supervisors in such au architecture, based on a reliability vs. cost trade. It also considers the implications of these results for the design of navigation systems for satellite formations that could be controlled with a partially decentralized architecture. Using an assumed cost model, analytic and simulation-based results indicate that it may be cheaper to achieve a given overall system reliability with a partially decentralized architecture containing only a few supervisors, than with either fully decentralized or purely centralized architectures. Nominally, the subset of supervisors may act as centralized estimation and control nodes for corresponding subsets of the remaining subordinate nodes, and act as decentralized estimation and control peers with respect to each other. However, in the context of partially decentralized satellite formation control, the absolute positions and velocities of each spacecraft are unique, so that correlations which make estimates using only local information suboptimal only occur through common biases and process noise. Covariance and monte-carlo analysis of a simplified system show that this lack of correlation may allow simplification of the local estimators while preserving the global optimality of the maneuvers commanded by the supervisors.

  8. 31 CFR 315.41 - Partial redemption.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Partial redemption. 315.41 Section 315.41 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL..., SERIES A, B, C, D, E, F, G, H, J, AND K, AND U.S. SAVINGS NOTES General Provisions for Payment §...

  9. Some Considerations on the Partial Credit Model

    ERIC Educational Resources Information Center

    Verhelst, N. D.; Verstralen, H. H. F. M.

    2008-01-01

    The Partial Credit Model (PCM) is sometimes interpreted as a model for stepwise solution of polytomously scored items, where the item parameters are interpreted as difficulties of the steps. It is argued that this interpretation is not justified. A model for stepwise solution is discussed. It is shown that the PCM is suited to model sums of binary…

  10. Canonical coordinates for partial differential equations

    NASA Technical Reports Server (NTRS)

    Hunt, L. R.; Villarreal, Ramiro

    1988-01-01

    Necessary and sufficient conditions are found under which operators of the form Sigma (m, j=1) x (2) sub j + X sub O can be made constant coefficient. In addition, necessary and sufficient conditions are derived which classify those linear partial differential operators that can be moved to the Kolmogorov type.

  11. Canonical coordinates for partial differential equations

    NASA Technical Reports Server (NTRS)

    Hunt, L. R.; Villarreal, Ramiro

    1987-01-01

    Necessary and sufficient conditions are found under which operators of the form Sigma(m, j=1) X(2)sub j + X sub 0 can be made constant coefficient. In addition, necessary and sufficient conditions are derived which classify those linear partial differential operators that can be moved to the Kolmogorov type.

  12. Some Partial Models for Urban Problems.

    ERIC Educational Resources Information Center

    Guthrie, Harold W.

    This paper focuses on partial models for solving urban problems to contrast our achievements as social scientists with our aspirations as prescribers of public policy. The objectives of this paper are (1) to review some of the reasons that an ideal set of solutions for urban problems has not been produced by social scientists and (2) to describe…

  13. Partial Data Traces: Efficient Generation and Representation

    SciTech Connect

    Mueller, F; De Supinski, B R; McKee, S A; Yoo, A

    2001-08-20

    Binary manipulation techniques are increasing in popularity. They support program transformations tailored toward certain program inputs, and these transformations have been shown to yield performance gains beyond the scope of static code optimizations without profile-directed feedback. They even deliver moderate gains in the presence of profile-guided optimizations. In addition, transformations can be performed on the entire executable, including library routines. This work focuses on program instrumentation, yet another application of binary manipulation. This paper reports preliminary results on generating partial data traces through dynamic binary rewriting. The contributions are threefold. First, a portable method for extracting precise data traces for partial executions of arbitrary applications is developed. Second, a set of hierarchical structures for compactly representing these accesses is developed. Third, an efficient online algorithm to detect regular accesses is introduced. The authors utilize dynamic binary rewriting to selectively collect partial address traces of regions within a program. This allows partial tracing of hot paths for only a short time during program execution in contrast to static rewriting techniques that lack hot path detection and also lack facilities to limit the duration of data collection. Preliminary results show reductions of three orders of a magnitude of inline instrumentation over a dual process approach involving context switching. They also report constant size representations for regular access patters in nested loops. These efforts are part of a larger project to counter the increasing gap between processor and main memory speeds by means of software optimization and hardware enhancements.

  14. Accommodating blind and partially sighted clients

    PubMed Central

    England, Gary; Gebbels, Tim; Whelan, Chantelle; Freeman, Sarah

    2014-01-01

    Veterinary surgeons provide an important service to blind and partially sighted guide dog owners. By adopting basic disability awareness and visual impairment training, practices can ensure that the assistance needs of those clients are met, facilitating access to veterinary care. PMID:25642013

  15. 24 CFR 203.371 - Partial claim.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... DEVELOPMENT MORTGAGE AND LOAN INSURANCE PROGRAMS UNDER NATIONAL HOUSING ACT AND OTHER AUTHORITIES SINGLE FAMILY MORTGAGE INSURANCE Contract Rights and Obligations Claim Procedure § 203.371 Partial claim. (a... not exceeded the equivalent of 12 monthly mortgage payments; (3) The mortgagor is able to...

  16. 44 CFR 295.6 - Partial payments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Partial payments. 295.6 Section 295.6 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY CERRO GRANDE FIRE ASSISTANCE CERRO GRANDE FIRE ASSISTANCE General § 295.6...

  17. 44 CFR 295.6 - Partial payments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 44 Emergency Management and Assistance 1 2011-10-01 2011-10-01 false Partial payments. 295.6 Section 295.6 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY CERRO GRANDE FIRE ASSISTANCE CERRO GRANDE FIRE ASSISTANCE General § 295.6...

  18. Headborne illuminator for the partially sighted.

    PubMed

    Goodlaw, E I; Genensky, S M

    1978-12-01

    An inexpensive, headborne device is described that provides a bright spot of light on reading material even when the material is brought within 1 or 2 cm of the viewing eye. This aid has been used with great success by one of the authors for about 2 yr. This illuminator, or modifications of it, should prove valuable to other partially sighted people.

  19. 32 CFR 751.13 - Partial payments.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... can demonstrate a need for immediate funds to replace some of those items (e.g., food, clothes, baby... shall be taken to ensure the amount of the partial payment is deducted from the adjudicated value of the... payments are to be subtracted from the adjudicated value of the claim before payment of the balance...

  20. Partial face recognition: alignment-free approach.

    PubMed

    Liao, Shengcai; Jain, Anil K; Li, Stan Z

    2013-05-01

    Numerous methods have been developed for holistic face recognition with impressive performance. However, few studies have tackled how to recognize an arbitrary patch of a face image. Partial faces frequently appear in unconstrained scenarios, with images captured by surveillance cameras or handheld devices (e.g., mobile phones) in particular. In this paper, we propose a general partial face recognition approach that does not require face alignment by eye coordinates or any other fiducial points. We develop an alignment-free face representation method based on Multi-Keypoint Descriptors (MKD), where the descriptor size of a face is determined by the actual content of the image. In this way, any probe face image, holistic or partial, can be sparsely represented by a large dictionary of gallery descriptors. A new keypoint descriptor called Gabor Ternary Pattern (GTP) is also developed for robust and discriminative face recognition. Experimental results are reported on four public domain face databases (FRGCv2.0, AR, LFW, and PubFig) under both the open-set identification and verification scenarios. Comparisons with two leading commercial face recognition SDKs (PittPatt and FaceVACS) and two baseline algorithms (PCA+LDA and LBP) show that the proposed method, overall, is superior in recognizing both holistic and partial faces without requiring alignment. PMID:23520259

  1. 40 CFR Table 7 to Subpart Vvvvvv... - Partially Soluble HAP

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 15 2014-07-01 2014-07-01 false Partially Soluble HAP 7 Table 7 to... Pt. 63, Subpt. VVVVVV, Table 7 Table 7 to Subpart VVVVVV of Part 63—Partially Soluble HAP As required... partially soluble HAP listed in the following table. Partially soluble HAP name CAS No. 1....

  2. 40 CFR Table 7 to Subpart Vvvvvv... - Partially Soluble HAP

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 15 2013-07-01 2013-07-01 false Partially Soluble HAP 7 Table 7 to... Pt. 63, Subpt. VVVVVV, Table 7 Table 7 to Subpart VVVVVV of Part 63—Partially Soluble HAP As required... partially soluble HAP listed in the following table. Partially soluble HAP name CAS No. 1....

  3. 40 CFR Table 7 to Subpart Vvvvvv... - Partially Soluble HAP

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 15 2012-07-01 2012-07-01 false Partially Soluble HAP 7 Table 7 to... Pt. 63, Subpt. VVVVVV, Table 7 Table 7 to Subpart VVVVVV of Part 63—Partially Soluble HAP As required... partially soluble HAP listed in the following table. Partially soluble HAP name CAS No. 1....

  4. Planarian Immobilization, Partial Irradiation, and Tissue Transplantation

    PubMed Central

    Guedelhoefer IV, Otto C.; Sánchez Alvarado, Alejandro

    2012-01-01

    The planarian, a freshwater flatworm, has proven to be a powerful system for dissecting metazoan regeneration and stem cell biology1,2. Planarian regeneration of any missing or damaged tissues is made possible by adult stem cells termed neoblasts3. Although these stem cells have been definitively shown to be pluripotent and singularly capable of reconstituting an entire animal4, the heterogeneity within the stem cell population and the dynamics of their cellular behaviors remain largely unresolved. Due to the large number and wide distribution of stem cells throughout the planarian body plan, advanced methods for manipulating subpopulations of stem cells for molecular and functional study in vivo are needed. Tissue transplantation and partial irradiation are two methods by which a subpopulation of planarian stem cells can be isolated for further study. Each technique has distinct advantages. Tissue transplantation allows for the introduction of stem cells, into a naïve host, that are either inherently genetically distinct or have been previously treated pharmacologically. Alternatively, partial irradiation allows for the isolation of stem cells within a host, juxtaposed to tissue devoid of stem cells, without the introduction of a wound or any breech in tissue integrity. Using these two methods, one can investigate the cell autonomous and non-autonomous factors that control stem cell functions, such as proliferation, differentiation, and migration. Both tissue transplantation5,6 and partial irradiation7 have been used historically in defining many of the questions about planarian regeneration that remain under study today. However, these techniques have remained underused due to the laborious and inconsistent nature of previous methods. The protocols presented here represent a large step forward in decreasing the time and effort necessary to reproducibly generate large numbers of grafted or partially irradiated animals with efficacies approaching 100 percent. We

  5. Retinal pigment epithelial change and partial lipodystrophy.

    PubMed Central

    Davis, T. M.; Holdright, D. R.; Schulenberg, W. E.; Turner, R. C.; Joplin, G. F.

    1988-01-01

    Cuticular drusen and retinal pigment epithelial changes were found incidentally in a 27 year old Lebanese woman during assessment of partial lipodystrophy. Her vision was normal despite involvement of both maculae. The patient had hypocomplementaemia, but serum C3 nephritic factor was absent and renal function was normal. She had impaired glucose tolerance and a continuous infusion of glucose with model assessment (CIGMA) test revealed low normal tissue insulin sensitivity and high normal pancreatic beta cell function. Mild fasting hypertriglyceridaemia (2.0 mmol/l) may have been secondary to impaired insulin sensitivity. Endocrine function was otherwise normal apart from a completely absent growth hormone response to adequate hypoglycaemia. The simultaneous occurrence of partial lipodystrophy and retinal pigmentary epithelial and basement membrane changes appears to be a newly recognized syndrome. Images Figure 1 Figure 2 PMID:3255937

  6. Wear mechanisms of partially stabilized zirconia

    SciTech Connect

    Aronov, V.

    1987-01-01

    This paper is devoted to an investigation of the wear mechanisms of magnesia and yttria partially-stabilized zirconia in ceramic/ceramic and ceramic/metal sliding-contact tribological systems at high temperature. It was found that the wear of ceramics rubbed against ceramics at room temperature may be attributed to intensive plastic deformation of surfaces resulting in low cycle fatigue. The wear mechanism of ceramics rubbed against metals was by polishing and surface fracture, while that of metals was adhesive transfer of material on to ceramic surfaces. Investigation of the wear behavior of magnesia partially-stabilized zirconia rubbed against itself showed that up to three orders of magnitude increase in wear resistance can be achieved in a particular temperature range, depending on both sliding speed and the ambient temperature. XRD analysis revealed that a thermally-induced phase transformation takes place on the frictional interface.

  7. Multiple teleportation via partially entangled GHZ state

    NASA Astrophysics Data System (ADS)

    Xiong, Pei-Ying; Yu, Xu-Tao; Zhan, Hai-Tao; Zhang, Zai-Chen

    2016-08-01

    Quantum teleportation is important for quantum communication. We propose a protocol that uses a partially entangled Greenberger-Horne-Zeilinger (GHZ) state for single hop teleportation. Quantum teleportation will succeed if the sender makes a Bell state measurement, and the receiver performs the Hadamard gate operation, applies appropriate Pauli operators, introduces an auxiliary particle, and applies the corresponding unitary matrix to recover the transmitted state.We also present a protocol to realize multiple teleportation of partially entangled GHZ state without an auxiliary particle. We show that the success probability of the teleportation is always 0 when the number of teleportations is odd. In order to improve the success probability of a multihop, we introduce the method used in our single hop teleportation, thus proposing a multiple teleportation protocol using auxiliary particles and a unitary matrix. The final success probability is shown to be improved significantly for the method without auxiliary particles for both an odd or even number of teleportations.

  8. Partial peritoneal alimentation in an infant.

    PubMed

    Merritt, R J; Atkinson, J B; Whalen, T V; Thomas, D W; Sinatra, F R; Roloson, G J

    1988-01-01

    We provided partial peritoneal alimentation to a 1.69-kg 11-month-old premature infant who had no available central venous access, depleted peripheral venous access, and gastrointestinal dysfunction. A cuffed silastic catheter was surgically inserted into the suprahepatic space. An alimentation solution was continuously infused into the peritoneum for 28 days to supplement peripheral venous and nasogastric alimentation and contributed 42 +/- 15% of total calories daily. Weight gain was achieved, but complications included hypoglycemia, hypophosphatemia, intravascular dehydration, catheter site leakage, ascites, and hydrocele. At autopsy 11 months later, lipid accumulation was present in the upper peritoneum and the hilar regions of the lungs secondary to preexisting lymphatic obstruction. Partial peritoneal alimentation may be feasible when other access routes are inadequate, but lymphatic obstruction is a contraindication to the peritoneal administration of lipid emulsions.

  9. Local cerebral metabolism during partial seizures

    SciTech Connect

    Engel, J. Jr.; Kuhl, D.E.; Phelps, M.E.; Rausch, R.; Nuwer, M.

    1983-04-01

    Interictal and ictal fluorodeoxyglucose scans were obtained with positron CT from four patients with spontaneous recurrent partial seizures, one with epilepsia partialis continua, and one with a single partial seizure induced by electrical stimulation of the hippocampus. Ictal metabolic patterns were different for each patient studied. Focal and generalized increased and decreased metabolism were observed. Ictal hypermetabolism may exceed six times the interictal rate and could represent activation of excitatory or inhibitory synapses in the epileptogenic region and its projection fields. Hypometabolism seen on ictal scans most likely reflects postictal depression and may indicate projection fields of inhibited neurons. No quantitative relationship between alterations in metabolism and EEG or behavioral measurements of ictal events could be demonstrated.

  10. The Lockheed alternate partial polarizer universal filter

    NASA Technical Reports Server (NTRS)

    Title, A. M.

    1976-01-01

    A tunable birefringent filter using an alternate partial polarizer design has been built. The filter has a transmission of 38% in polarized light. Its full width at half maximum is .09A at 5500A. It is tunable from 4500 to 8500A by means of stepping motor actuated rotating half wave plates and polarizers. Wave length commands and thermal compensation commands are generated by a PPD 11/10 minicomputer. The alternate partial polarizer universal filter is compared with the universal birefringent filter and the design techniques, construction methods, and filter performance are discussed in some detail. Based on the experience of this filter some conclusions regarding the future of birefringent filters are elaborated.

  11. Dynamic partial FPGA reconfiguration in space applications

    NASA Astrophysics Data System (ADS)

    Graczyk, Rafal; Stolarski, Marcin; Palau, Marie-Catherine; Orleanski, Piotr

    2012-05-01

    Design and implementation of hardware mock-up of high performance system for general avionics testing in reconfigurable FPGAs. Strong emphasis is put on exploiting dynamic partial reconfiguration capability as a method for functionality multiplexing and fault mitigation. Additionally, dynamic reconfiguration can be used for fault injection which makes Single Event Upset in configuration memory simulation possible. LEON3 processors are used to create an avionic systems test-bed, for testing the mock-ups of real system flight software and testing dynamic full and partial reconfiguration. Experiments with different means of reconfiguration are performed to measure reconfiguration times and stability of software. Several solutions for whole system reconfiguration controller have been implemented and tested.

  12. Applications of partially quenched chiral perturbation theory

    SciTech Connect

    Golterman, M.F.; Leung, K.C.

    1998-05-01

    Partially quenched theories are theories in which the valence- and sea-quark masses are different. In this paper we calculate the nonanalytic one-loop corrections of some physical quantities: the chiral condensate, weak decay constants, Goldstone boson masses, B{sub K}, and the K{sup +}{r_arrow}{pi}{sup +}{pi}{sup 0} decay amplitude, using partially quenched chiral perturbation theory. Our results for weak decay constants and masses agree with, and generalize, results of previous work by Sharpe. We compare B{sub K} and the K{sup +} decay amplitude with their real-world values in some examples. For the latter quantity, two other systematic effects that plague lattice computations, namely, finite-volume effects and unphysical values of the quark masses and pion external momenta, are also considered. We find that typical one-loop corrections can be substantial. {copyright} {ital 1998} {ital The American Physical Society}

  13. Transient myeloproliferative disorder with partial trisomy 21.

    PubMed

    Takahashi, Takahide; Inoue, Akira; Yoshimoto, Junko; Kanamitsu, Kiichiro; Taki, Tomohiko; Imada, Masahide; Yamada, Mutsuko; Ninomiya, Shinsuke; Toki, Tsutomu; Terui, Kiminori; Ito, Etsuro; Shimada, Akira

    2015-11-01

    Myeloid malignancy with Down syndrome (ML-DS) is estimated to have a step-wise leukemogenesis including GATA1 mutation. Trisomy 21 is essential for ML-DS; however, we do not know exactly which gene or genes located on chromosome 21 are necessary for the ML-DS. We report a female infant with transient myeloproliferative disorder (TMD) and partial trisomy 21. SNP array analysis showed 10 Mb amplification of 21q22.12-21q22.3, which included DYRK1A, ERG, and ETS but not the RUNX1 gene. With two other reported TMD cases having partial trisomy 21, DYRK1A, ERG, and ETS were the most likely genes involved in collaboration with the GATA1 mutation. PMID:26138905

  14. Deterministic dense coding with partially entangled states

    SciTech Connect

    Mozes, Shay; Reznik, Benni; Oppenheim, Jonathan

    2005-01-01

    The utilization of a d-level partially entangled state, shared by two parties wishing to communicate classical information without errors over a noiseless quantum channel, is discussed. We analytically construct deterministic dense coding schemes for certain classes of nonmaximally entangled states, and numerically obtain schemes in the general case. We study the dependency of the maximal alphabet size of such schemes on the partially entangled state shared by the two parties. Surprisingly, for d>2 it is possible to have deterministic dense coding with less than one ebit. In this case the number of alphabet letters that can be communicated by a single particle is between d and 2d. In general, we numerically find that the maximal alphabet size is any integer in the range [d,d{sup 2}] with the possible exception of d{sup 2}-1. We also find that states with less entanglement can have a greater deterministic communication capacity than other more entangled states.

  15. Partial Androgen Insensitivity Syndrome Presenting with Gynecomastia

    PubMed Central

    Lee, Sung Won; Kwak, Dong Shin; Jung, In Sub; Kwak, Joo Hee; Park, Jung Hwan; Hong, Sang Mo; Lee, Chang Bum; Park, Yong Soo; Kim, Dong Sun; Choi, Woong Hwan

    2015-01-01

    Gynecomastia is a benign enlargement of the male breast caused by the proliferation of glandular breast tissue. Determining the various causes of gynecomastia such as physiological causes, drugs, systemic diseases, and endocrine disorders is important. Androgen insensitivity syndrome (AIS) is a rare endocrine disorder presenting with gynecomastia and is a disorder of male sexual differentiation caused by mutations within the androgen receptor gene. All individuals with AIS have the 46 XY karyotype, although AIS phenotypes can be classified as mild, partial or complete and can differ among both males and females including ambiguous genitalia or infertility in males. We experienced a case of partial AIS presenting with gynecomastia and identified the androgen receptor gene mutation. PMID:25433660

  16. Optimal partial deterministic quantum teleportation of qubits

    SciTech Connect

    Mista, Ladislav Jr.; Filip, Radim

    2005-02-01

    We propose a protocol implementing optimal partial deterministic quantum teleportation for qubits. This is a teleportation scheme realizing deterministically an optimal 1{yields}2 asymmetric universal cloning where one imperfect copy of the input state emerges at the sender's station while the other copy emerges at receiver's possibly distant station. The optimality means that the fidelities of the copies saturate the asymmetric cloning inequality. The performance of the protocol relies on the partial deterministic nondemolition Bell measurement that allows us to continuously control the flow of information among the outgoing qubits. We also demonstrate that the measurement is optimal two-qubit operation in the sense of the trade-off between the state disturbance and the information gain.

  17. Apparatus for generating partially coherent radiation

    DOEpatents

    Naulleau, Patrick P.

    2004-09-28

    The effective coherence of an undulator beamline can be tailored to projection lithography requirements by using a simple single moving element and a simple stationary low-cost spherical mirror. The invention is particularly suited for use in an illuminator device for an optical image processing system requiring partially coherent illumination. The illuminator includes: (i) source of coherent or partially coherent radiation which has an intrinsic coherence that is higher than the desired coherence; (ii) a reflective surface that receives incident radiation from said source; (iii) means for moving the reflective surface through a desired range of angles in two dimensions wherein the rate of the motion is fast relative to integration time of said image processing system; and (iv) a condenser optic that re-images the moving reflective surface to the entrance plane of said image processing system, thereby, making the illumination spot in said entrance plane essentially stationary.

  18. Partial Conservation of Seniority and Nuclear Isomerism

    SciTech Connect

    Van Isacker, P.; Heinze, S.

    2008-02-08

    We point out the possibility of the partial conservation of the seniority quantum number when most eigenstates are mixed in seniority but some remain pure. This situation occurs in nuclei for the g{sub 9/2} and h{sub 9/2} shells where it is at the origin of the existence of seniority isomers in the ruthenium and palladium isotopes. It also occurs for f bosons.

  19. Partial reinforcement in human biofeedback learning.

    PubMed

    Morley, S

    1979-09-01

    This paper reviews the evidence for the efficacy of partial reinforcement in producing resistance to extinction in human biofeedback experiments. The methodological criteria necessary to demonstrate such effects are discussed, as is the status of the analogy of reinforcement and information feedback. It is suggested that the problem of maintaining responding in the absence of feedback should be tackled empirically rather than assuming the validity of findings from other areas of learning theory.

  20. Lifted Partially Premixed Flames in Microgravity

    NASA Technical Reports Server (NTRS)

    Lock, Andrew J.; Ganguly, Ranjan; Puri, Ishwar K.; Aggarwal, Suesh K.; Hegde, Uday

    2004-01-01

    Lifted Double and Triple flames are established in the UIC-NASA Partially Premixed microgravity rig. The flames examined in this paper are established above a coannular burner because its axisymmetric geometry allows for future implementation of other non-intrusive optical diagnostic techniques easily. Both burner-attached stable flames and lifted flames are established at normal and microgravity conditions in the drop tower facility.

  1. Partial Dynamical Symmetry in Nuclear Systems

    SciTech Connect

    Escher, J E

    2003-06-02

    Partial dynamical symmetry (PDS) extends and complements the concepts of exact and dynamical symmetry. It allows one to remove undesired constraints from an algebraic theory, while preserving some of the useful aspects of a dynamical symmetry, and to study the effects of symmetry breaking in a controlled manner. An example of a PDS in an interacting fermion system is presented. The associated PDS Hamiltonians are closely related with a realistic quadrupole-quadrupole interaction and provide new insights into this important interaction.

  2. Nonphotosensitive video game-induced partial seizures.

    PubMed

    Takahashi, Y; Shigematsu, H; Kubota, H; Inoue, Y; Fujiwara, T; Yagi, K; Seino, M

    1995-08-01

    We report a 9-year-old boy with a ring 20 chromosome anomaly whose complex partial seizures (CPS), presumably of frontal lobe origin, were often induced by playing video games. Neither photosensitivity nor pattern sensitivity was observed. An intensive video-EEG investigation showed that video games as well as mental calculation elicited rhythmic runs of bilateral high-voltage slow waves, which eventually evolved into ictal discharges. This case suggests that higher brain functions can be involved in seizure induction.

  3. Pseudopotential Method for Higher Partial Wave Scattering

    SciTech Connect

    Idziaszek, Zbigniew; Calarco, Tommaso

    2006-01-13

    We present a zero-range pseudopotential applicable for all partial wave interactions between neutral atoms. For p and d waves, we derive effective pseudopotentials, which are useful for problems involving anisotropic external potentials. Finally, we consider two nontrivial applications of the p-wave pseudopotential: we solve analytically the problem of two interacting spin-polarized fermions confined in a harmonic trap, and we analyze the scattering of p-wave interacting particles in a quasi-two-dimensional system.

  4. Partial intravenous anesthesia in cats and dogs

    PubMed Central

    Duke, Tanya

    2013-01-01

    The partial intravenous anesthesia technique (PIVA) is used to lower the inspired concentration of an inhalational anesthetic by concurrent use of injectable drugs. This technique reduces the incidence of undesirable side-effects and provides superior quality of anesthesia and analgesia. Drugs commonly used for PIVA include opioids, alpha-2 adrenergic agonists, injectable anesthetic agents, and lidocaine. Most are administered by intravenous infusion. PMID:23997266

  5. Observability of discretized partial differential equations

    NASA Technical Reports Server (NTRS)

    Cohn, Stephen E.; Dee, Dick P.

    1988-01-01

    It is shown that complete observability of the discrete model used to assimilate data from a linear partial differential equation (PDE) system is necessary and sufficient for asymptotic stability of the data assimilation process. The observability theory for discrete systems is reviewed and applied to obtain simple observability tests for discretized constant-coefficient PDEs. Examples are used to show how numerical dispersion can result in discrete dynamics with multiple eigenvalues, thereby detracting from observability.

  6. The partially filled viscous ring damper.

    NASA Technical Reports Server (NTRS)

    Alfriend, K. T.

    1973-01-01

    The problem of a spinning satellite with a partially filled viscous ring damper is investigated. It is shown that there are two distinct modes of motion, the nutation-synchronous mode and spin-synchronous mode. From an approximate solution of the equations of motion a time constant is obtained for each mode. From a consideration of the fluid dynamics several methods are developed for determining the damping constant.

  7. Underdetermined systems of partial differential equations

    SciTech Connect

    Bender, Carl M.; Dunne, Gerald V.; Mead, Lawrence R.

    2000-09-01

    This paper examines underdetermined systems of partial differential equations in which the independent variables may be classical c-numbers or even quantum operators. One can view an underdetermined system as expressing the kinematic constraints on a set of dynamical variables that generate a Lie algebra. The arbitrariness in the general solution reflects the freedom to specify the dynamics of such a system. (c) 2000 American Institute of Physics.

  8. Class of positive partial transposition states

    SciTech Connect

    Chruscinski, Dariusz; Kossakowski, Andrzej

    2006-08-15

    We construct a class of quantum bipartite d(multiply-in-circle sign)d states which are positive under partial transposition (PPT states). This class is invariant under the maximal commutative subgroup of U(d) and contains as special cases many well-known examples of PPT states. States from our class provide criteria for testing the indecomposability of positive maps. Such maps are crucial for constructing entanglement witnesses.

  9. 75 FR 68093 - Partial Grant and Partial Denial of Clean Air Act Waiver Application Submitted by Growth Energy...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-04

    ... Protection Agency Partial Grant and Partial Denial of Clean Air Act Waiver Application Submitted by Growth Energy To Increase the Allowable Ethanol Content of Gasoline to 15 Percent; Decision of the Administrator...; ] ENVIRONMENTAL PROTECTION AGENCY Partial Grant and Partial Denial of Clean Air Act Waiver Application...

  10. Viscous fingering with partial miscible fluids

    NASA Astrophysics Data System (ADS)

    Fu, Xiaojing; Cueto-Felgueroso, Luis; Juanes, Ruben

    2015-11-01

    When a less viscous fluid displaces a more viscous fluid, the contrast in viscosity destabilizes the interface between the two fluids, leading to the formation of fingers. Studies of viscous fingering have focused on fluids that are either fully miscible or perfectly immiscible. In practice, however, the miscibility of two fluids can change appreciably with temperature and pressure, and often falls into the case of partial miscibility, where two fluids have limited solubility in each other. Following our recent work for miscible (Jha et al., PRL 2011, 2013) and immiscible systems (Cueto-Felgueroso and Juanes, PRL 2012, JFM 2014), here we propose a phase-field model for fluid-fluid displacements in a Hele-Shaw cell, when the two fluids have limited (but nonzero) solubility in one another. Partial miscibility is characterized through the design of thermodynamic free energy of the two-fluid system. We elucidate the key dimensionless groups that control the behavior of the system. We present high-resolution numerical simulations of the model applied to the viscous fingering problem. On one hand, we demonstrate the effect of partial miscibility on the hydrodynamic instability. On the other, we elucidate the role of the degree of fingering on the rate of mutual fluid dissolution.

  11. Multichannel cochlear implants in partially ossified cochleas.

    PubMed

    Balkany, T; Gantz, B; Nadol, J B

    1988-01-01

    Deposition of bone within the fluid spaces of the cochlea is encountered commonly in cochlear implant candidates and previously has been considered a relative contraindication to the use of multichannel intracochlear electrodes. This contraindication has been based on possible mechanical difficulty with electrode insertion as well as uncertainty about the potential benefit of the multichannel device in the patient. Fifteen profoundly deaf patients with partial ossification of the basal turn of the cochlea received implants with long intracochlear electrodes (11, Nucleus; 1, University of California at San Francisco/Storz; and 3, Symbion/Inneraid). In 11 cases, ossification had been predicted preoperatively by computed tomographic scan. Electrodes were completely inserted in 14 patients, and partial insertion was accomplished in one patient. All patients currently are using their devices and nine of 12 postlingually deaf patients have achieved some degree of open-set speech discrimination. This series demonstrates that in experienced hands, insertion of long multichannel electrodes into partially ossified cochleas is possible and that results are similar to those achieved in patients who have nonossified cochleas. PMID:3140705

  12. Acute renal injury after partial hepatectomy

    PubMed Central

    Peres, Luis Alberto Batista; Bredt, Luis Cesar; Cipriani, Raphael Flavio Fachini

    2016-01-01

    Currently, partial hepatectomy is the treatment of choice for a wide variety of liver and biliary conditions. Among the possible complications of partial hepatectomy, acute kidney injury (AKI) should be considered as an important cause of increased morbidity and postoperative mortality. Difficulties in the data analysis related to postoperative AKI after liver resections are mainly due to the multiplicity of factors to be considered in the surgical patients, moreover, there is no consensus of the exact definition of AKI after liver resection in the literature, which hampers comparison and analysis of the scarce data published on the subject. Despite this multiplicity of risk factors for postoperative AKI after partial hepatectomy, there are main factors that clearly contribute to its occurrence. First factor relates to large blood losses with renal hypoperfusion during the operation, second factor relates to the occurrence of post-hepatectomy liver failure with consequent distributive circulatory changes and hepatorenal syndrome. Eventually, patients can have more than one factor contributing to post-operative AKI, and frequently these combinations of acute insults can be aggravated by sepsis or exposure to nephrotoxic drugs. PMID:27478539

  13. Partial-Vacuum-Gasketed Electrochemical Corrosion Cell

    NASA Technical Reports Server (NTRS)

    Bonifas, Andrew P.; Calle, Luz M.; Hintze, Paul E.

    2006-01-01

    An electrochemical cell for making corrosion measurements has been designed to prevent or reduce crevice corrosion, which is a common source of error in prior such cells. The present cell (see figure) includes an electrolyte reservoir with O-ring-edged opening at the bottom. In preparation for a test, the reservoir, while empty, is pressed down against a horizontal specimen surface to form an O-ring seal. A purge of air or other suitable gas is begun in the reservoir, and the pressure in the reservoir is regulated to maintain a partial vacuum. While maintaining the purge and partial vacuum, and without opening the interior of the reservoir to the atmosphere, the electrolyte is pumped into the reservoir. The reservoir is then slowly lifted a short distance off the specimen. The level of the partial vacuum is chosen such that the differential pressure is just sufficient to keep the electrolyte from flowing out of the reservoir through the small O-ring/specimen gap. Electrochemical measurements are then made. Because there is no gasket (and, hence, no crevice between the specimen and the gasket), crevice corrosion is unlikely to occur.

  14. Acute renal injury after partial hepatectomy.

    PubMed

    Peres, Luis Alberto Batista; Bredt, Luis Cesar; Cipriani, Raphael Flavio Fachini

    2016-07-28

    Currently, partial hepatectomy is the treatment of choice for a wide variety of liver and biliary conditions. Among the possible complications of partial hepatectomy, acute kidney injury (AKI) should be considered as an important cause of increased morbidity and postoperative mortality. Difficulties in the data analysis related to postoperative AKI after liver resections are mainly due to the multiplicity of factors to be considered in the surgical patients, moreover, there is no consensus of the exact definition of AKI after liver resection in the literature, which hampers comparison and analysis of the scarce data published on the subject. Despite this multiplicity of risk factors for postoperative AKI after partial hepatectomy, there are main factors that clearly contribute to its occurrence. First factor relates to large blood losses with renal hypoperfusion during the operation, second factor relates to the occurrence of post-hepatectomy liver failure with consequent distributive circulatory changes and hepatorenal syndrome. Eventually, patients can have more than one factor contributing to post-operative AKI, and frequently these combinations of acute insults can be aggravated by sepsis or exposure to nephrotoxic drugs. PMID:27478539

  15. Partially ordered sets in complex networks

    NASA Astrophysics Data System (ADS)

    Xuan, Qi; Du, Fang; Wu, Tie-Jun

    2010-05-01

    In this paper, a partial-order relation is defined among vertices of a network to describe which vertex is more important than another on its contribution to the connectivity of the network. A maximum linearly ordered subset of vertices is defined as a chain and the chains sharing the same end-vertex are grouped as a family. Through combining the same vertices appearing in different chains, a directed chain graph is obtained. Based on these definitions, a series of new network measurements, such as chain length distribution, family diversity distribution, as well as the centrality of families, are proposed. By studying the partially ordered sets in three kinds of real-world networks, many interesting results are revealed. For instance, the similar approximately power-law chain length distribution may be attributed to a chain-based positive feedback mechanism, i.e. new vertices prefer to participate in longer chains, which can be inferred by combining the notable preferential attachment rule with a well-ordered recommendation manner. Moreover, the relatively large average incoming degree of the chain graphs may indicate an efficient substitution mechanism in these networks. Most of the partially ordered set-based properties cannot be explained by the current well-known scale-free network models; therefore, we are required to propose more appropriate network models in the future.

  16. Full and Partial Cloaking in Electromagnetic Scattering

    NASA Astrophysics Data System (ADS)

    Deng, Youjun; Liu, Hongyu; Uhlmann, Gunther

    2016-08-01

    In this paper, we consider two regularized transformation-optics cloaking schemes for electromagnetic (EM) waves. Both schemes are based on the blowup construction with the generating sets being, respectively, a generic curve and a planar subset. We derive sharp asymptotic estimates in assessing the cloaking performances of the two constructions in terms of the regularization parameters and the geometries of the cloaking devices. The first construction yields an approximate full-cloak, whereas the second construction yields an approximate partial-cloak. Moreover, by incorporating properly chosen conducting layers, both cloaking constructions are capable of nearly cloaking arbitrary EM contents. This work complements the existing results in Ammari et al. (SIAM J Appl Math 73:2055-2076, 2013), Bao and Liu (SIAM J Appl Math 74:724-742, 2014), Bao et al. (J Math Pure Appl (9) 101:716-733, 2014) on approximate EM cloaks with the generating set being a singular point, and it also extends Deng et al. (On regularized full- and partial-cloaks in acoustic scat- tering. Preprint, arXiv:1502.01174, 2015), Li et al. (Commun Math Phys, 335:671-712, 2015) on regularized full and partial cloaks for acoustic waves governed by the Helmholtz system to the more challenging EM case governed by the full Maxwell system.

  17. Conformal Visualization for Partially-Immersive Platforms

    PubMed Central

    Petkov, Kaloian; Papadopoulos, Charilaos; Zhang, Min; Kaufman, Arie E.; Gu, Xianfeng

    2010-01-01

    Current immersive VR systems such as the CAVE provide an effective platform for the immersive exploration of large 3D data. A major limitation is that in most cases at least one display surface is missing due to space, access or cost constraints. This partially-immersive visualization results in a substantial loss of visual information that may be acceptable for some applications, however it becomes a major obstacle for critical tasks, such as the analysis of medical data. We propose a conformal deformation rendering pipeline for the visualization of datasets on partially-immersive platforms. The angle-preserving conformal mapping approach is used to map the 360°3D view volume to arbitrary display configurations. It has the desirable property of preserving shapes under distortion, which is important for identifying features, especially in medical data. The conformal mapping is used for rasterization, realtime raytracing and volume rendering of the datasets. Since the technique is applied during the rendering, we can construct stereoscopic images from the data, which is usually not true for image-based distortion approaches. We demonstrate the stereo conformal mapping rendering pipeline in the partially-immersive 5-wall Immersive Cabin (IC) for virtual colonoscopy and architectural review. PMID:26279083

  18. Partial entrainment of gravel bars during floods

    USGS Publications Warehouse

    Konrad, C.P.; Booth, D.B.; Burges, S.J.; Montgomery, D.R.

    2002-01-01

    Spatial patterns of bed material entrainment by floods were documented at seven gravel bars using arrays of metal washers (bed tags) placed in the streambed. The observed patterns were used to test a general stochastic model that bed material entrainment is a spatially independent, random process where the probability of entrainment is uniform over a gravel bar and a function of the peak dimensionless shear stress ??*0 of the flood. The fraction of tags missing from a gravel bar during a flood, or partial entrainment, had an approximately normal distribution with respect to ??*0 with a mean value (50% of the tags entrained) of 0.085 and standard deviation of 0.022 (root-mean-square error of 0.09). Variation in partial entrainment for a given ??*0 demonstrated the effects of flow conditioning on bed strength, with lower values of partial entrainment after intermediate magnitude floods (0.065 < ??*0 < 0.08) than after higher magnitude floods. Although the probability of bed material entrainment was approximately uniform over a gravel bar during individual floods and independent from flood to flood, regions of preferential stability and instability emerged at some bars over the course of a wet season. Deviations from spatially uniform and independent bed material entrainment were most pronounced for reaches with varied flow and in consecutive floods with small to intermediate magnitudes.

  19. Energy considerations in the partial space elevator

    NASA Astrophysics Data System (ADS)

    Woo, Pamela; Misra, Arun K.

    2014-06-01

    The space elevator has been proposed as an alternate method for space transportation. A partial elevator is composed of a tether of several hundreds of kilometres, held vertically in tension between two end masses, with its centre of orbit placed at the geosynchronous orbit. A spacecraft can dock at the lower end, and then use the climber on the elevator to ascend to higher altitudes. In this paper, energy calculations are performed, to determine whether a partial elevator can provide sufficient savings in operational costs, compared to the traditional rocket-powered launch. The energy required to launch a spacecraft from a Low Earth Orbit (LEO) to the geostationary orbit (GEO) is calculated for two trajectories. In the first trajectory, the spacecraft travels from LEO to GEO via a Hohmann transfer. In the second trajectory, the spacecraft travels from LEO to the lower end of the partial space elevator with a Hohmann transfer, and then uses the elevator to climb to GEO. The total energy required is compared between the two trajectories. The effects of tether length, spacecraft-to-climber mass ratio, altitude of LEO, and tether material are investigated.

  20. Primary Ciliary Dyskinesia and Neonatal Respiratory Distress

    PubMed Central

    Mullowney, Tara; Manson, David; Kim, Raymond; Stephens, Derek; Shah, Vibhuti

    2014-01-01

    BACKGROUND AND OBJECTIVE: Primary ciliary dyskinesia (PCD) is a rare inherited disease affecting motile cilia lining the respiratory tract. Despite neonatal respiratory distress as an early feature, diagnosis is typically delayed until late childhood. Our objective was to identify characteristics that differentiate PCD from common causes of term neonatal respiratory distress. METHODS: This was a case-control study. Patients with PCD born after 1994 attending a regional PCD clinic who had a history of neonatal respiratory distress (n = 46) were included. Controls (n = 46), term neonates with respiratory distress requiring a chest radiograph, were randomly selected from hospital birth records and matched on gender, birth month/year, and mode of delivery. Multiple logistic regression was used to determine the association between neonatal characteristics and PCD diagnosis. The diagnostic performance of the best predictive variables was estimated by calculating sensitivity and specificity. RESULTS: PCD cases required more oxygen therapy (39 cases, 29 controls, P = .01), longer duration of oxygen therapy (PCD mean = 15.2 days, control mean = 0.80 days, P < .01), had later onset of neonatal respiratory distress (PCD median = 12 hours, control median = 1 hour, P < .001), and higher frequency of lobar collapse and situs inversus (PCD = 70% and 48% respectively, control = 0% for both, P < .001). Situs inversus, lobar collapse, or oxygen need for >2 days had 87% (95% confidence interval: 74–94) sensitivity and 96% (95% confidence interval: 85–99) specificity for PCD. CONCLUSIONS: When encountering term neonates with unexplained respiratory distress, clinicians should consider PCD in those with lobar collapse, situs inversus, and/or prolonged oxygen therapy (>2 days). PMID:25422025

  1. The partial fission of fast spinning asteroids

    NASA Astrophysics Data System (ADS)

    Tardivel, Simon; Sanchez, Paul; Scheeres, Daniel J.

    2016-10-01

    The spin rates of asteroids systematically change over time due the Yarkovsky–O'Keefe–Radzievskii–Paddack (YORP) effect. Above a certain spin rate that depends on the body's density, regions of an asteroid can enter in tension, with components held to the body by cohesive forces. When the body fails, deformation or fission can occur. Catastrophic fission leading to complete disruption has been directly observed in active asteroid P/2013 R3. Partial fission, the loss of only part of the body, has been proposed as a mechanism for the formation of binaries and is explored here.The equatorial cavities of (341843) 2008 EV5 and of (185851) 2000 DP107 (a binary system) are consistent with a localized partial fission of the body (LPSC 2016 #1036). The examination of the gravity field of these bodies reveals that a mass placed within these cavities could be shed. In this mechanism, the outward pull of inertial forces creates an average stress at the cavity interface of ≈1 Pa for 2008 EV5 and ≈3 Pa for 2000 DP107 at spin periods of ≈3.15 h for the assumed densities of 1.3 g/cm3.This work continues the study of this partial, localized fission. Specifically, it addresses the issue of the low cohesion necessary to the mechanism. These cohesion values are typically lower than global strength values inferred on other asteroids (10 - 200 Pa), meaning that partial fission may occur prior to larger-scale deformations. Yet, several processes can explain the discrepancy, as they can naturally segregate particles by size. For instance, landslides or granular convection (Brazil nut effect) could bring larger boulders to the equator of the body, while finer particles are left at higher latitudes or sink to the center. Conversely, failure of the interior could bring boulders to the surface. The peculiar profile shape of these asteroids, shared by many binaries (e.g. 1999 KW4, 1996 FG3) may also be a clue of this heterogeneity, as this "spin top" shape is obtained in

  2. Liquid spreading under partial wetting conditions

    NASA Astrophysics Data System (ADS)

    Chen, M.; Pahlavan, A. A.; Cueto-Felgueroso, L.; McKinley, G. H.; Juanes, R.

    2013-12-01

    Traditional mathematical descriptions of multiphase flow in porous media rely on a multiphase extension of Darcy's law, and lead to nonlinear second-order (advection-diffusion) partial differential equations for fluid saturations. Here, we study horizontal redistribution of immiscible fluids. The traditional Darcy-flow model predicts that the spreading of a finite amount of liquid in a horizontal porous medium never stops; a prediction that is not substantiated by observation. To help guide the development of new models of multiphase flow in porous media [1], we draw an analogy with the flow of thin films. The flow of thin films over flat surfaces has been the subject of much theoretical, experimental and computational research [2]. Under the lubrication approximation, the classical mathematical model for these flows takes the form of a nonlinear fourth-order PDE, where the fourth-order term models the effect of surface tension [3]. This classical model, however, effectively assumes that the film is perfectly wetting to the substrate and, therefore, does not capture the partial wetting regime. Partial wetting is responsible for stopping the spread of a liquid puddle. Here, we present experiments of (large-volume) liquid spreading over a flat horizontal substrate in the partial wetting regime, and characterize the four spreading regimes that we observe. We extend our previous theoretical work of two-phase flow in a capillary tube [4], and develop a macroscopic phase-field modeling of thin-film flows with partial wetting. Our model naturally accounts for the dynamic contact angle at the contact line, and therefore permits modeling thin-film flows without invoking a precursor film, leading to compactly-supported solutions that reproduce the spreading dynamics and the static equilibrium configuration observed in the experiments. We anticipate that this modeling approach will provide a natural mathematical framework to describe spreading and redistribution of immiscible

  3. Heterotaxy in southern Nevada: prenatal detection and epidemiology.

    PubMed

    Evans, William N; Acherman, Ruben J; Restrepo, Humberto

    2015-06-01

    We retrospectively analyzed a combination of prenatally detected and postnatally diagnosed patients with heterotaxic situs that included those with situs inversus, bilateral left-sidedness, and bilateral right-sidedness for the period between April 2002 and July 2014. We found a statistically higher prevalence in the Hispanic population of Southern Nevada of 2.7/10,000 live births (95 % confidence intervals of 1.7-3.9) versus the non-Hispanic population of 1.6/10,000 live births (95 % confidence intervals of 1.1-2.1), p = 0.04. Additionally, we noted a high prenatal detection rate of 68 % over the 12-year period of time, rising to 100 % over the last 2 years.

  4. Heterotaxy in southern Nevada: prenatal detection and epidemiology.

    PubMed

    Evans, William N; Acherman, Ruben J; Restrepo, Humberto

    2015-06-01

    We retrospectively analyzed a combination of prenatally detected and postnatally diagnosed patients with heterotaxic situs that included those with situs inversus, bilateral left-sidedness, and bilateral right-sidedness for the period between April 2002 and July 2014. We found a statistically higher prevalence in the Hispanic population of Southern Nevada of 2.7/10,000 live births (95 % confidence intervals of 1.7-3.9) versus the non-Hispanic population of 1.6/10,000 live births (95 % confidence intervals of 1.1-2.1), p = 0.04. Additionally, we noted a high prenatal detection rate of 68 % over the 12-year period of time, rising to 100 % over the last 2 years. PMID:25586256

  5. Creating a Fontan fenestration in a child with dextrocardia and interrupted inferior vena cava.

    PubMed

    Charlagorla, Pradeepkumar; Breinholt, John P

    2016-01-01

    Plastic bronchitis is a rare life-threatening complication of the Fontan operation. Transcatheter Fontan fenestration can ameliorate symptoms by decompressing elevated venous pressures. Transcatheter creation of a fenestration can be technically challenging in cases with complex venous anatomy. We report a case of a 5-year-old boy with heterotaxy, dextrocardia with unbalanced atrioventricular canal (AVC), atrial and visceral situs inversus, left-sided superior vena cava (SVC), and left-sided interrupted inferior vena cava (IVC) with azygos continuation. With few modifications to the equipment, a successful Fontan fenestration with stent implantation was performed via transjugular approach. At 2-year follow-up, his symptoms of plastic bronchitis improved significantly.

  6. Bronchopulmonary sequestration and dextrocardia.

    PubMed

    Ivanovi-Herceg, Z; Majerić-Kogler, V; Mazuranić, I; Neralić-Meniga, I; Puljić, I

    1998-06-01

    Bronchopulmonary sequestration (BPS) is usually a rare congenital anomaly, which is most frequently extralobar or intralobar. The case of a patient with positional congenital anomaly--dextrocardia (situs thoracalis inversus) and intrapulmonary sequestration (IPS) is presented. Clinical and radiological characteristics of EPS and IPS are discussed, and new combinations of congenital anomalies with bronchopulmonary sequestration are described, dextrocardia and intrapulmonary sequestration. The importance of the algorithm of diagnostic examinations is emphasized, from detection of bronchopulmonary sequestration on the chest roentgenogram to establishing a definite diagnosis by means of angiography.

  7. Left-sided gallbladder discovered during laparoscopic cholecystectomy in a patient with dextrocardia.

    PubMed

    Sadhu, Sagar; Jahangir, Tarshid A; Roy, Manas K

    2012-04-01

    Left-sided gallbladder, a rare congenital anomaly, is often associated with transposition of single or multiple viscera of thorax and/or abdomen. Clinical features and routine presurgical ultrasonography could miss the anomalous position thereby producing unnecessary anxiety during surgery. Here we are reporting a patient with left-sided gallbladder, known to have dextrocardia with multiple intracardiac anomalies, and detected incidentally in a series of 1258 consecutive laparoscopic cholecystectomies. Laparoscopic cholecystectomy was performed successfully in this patient with port site modification and careful dissection. Some degree of abdominal visceral situs inversus is to be anticipated in patients with dextrocardia.

  8. [Kartagener's syndrome: a case report].

    PubMed

    Thiam, M; Gning, S B; Faye, M B; Fall, P D; Mbaye, A; Charpentier, P

    2002-01-01

    The authors report a rare case of Kartagener's syndrome in 8 years old girl revelated by congenital cardiopathy with chronic bronchitis and severe heart failure. Incomplet endocardial cushion defect with single atrium was found and situs inversus suspected, confirmed by ultrasonography. She undergone cardiac surgery in Europe: atrial septation and mitralvalve repair. Surgery redux was neccessary formitral insufficency and residual shunt. Persistent atelectasia in lower inferior lobe indicated bronchoscopy. Lung biopsy confirmed Kartagener's syndrome. Now, she has no cardiac symptom, but bronchitis and chronic pansinusitis. PMID:15776606

  9. Gravity Effects Observed In Partially Premixed Flames

    NASA Technical Reports Server (NTRS)

    Puri, Ishwar K.; Aggarwal, Suresh K.; Lock, Andrew J.; Gauguly, Ranjan; Hegde, Uday

    2003-01-01

    Partially premixed flames (PPFs) contain a rich premixed fuel air mixture in a pocket or stream, and, for complete combustion to occur, they require the transport of oxidizer from an appropriately oxidizer-rich (or fuel-lean) mixture that is present in another pocket or stream. Partial oxidation reactions occur in fuel-rich portions of the mixture and any remaining unburned fuel and/or intermediate species are consumed in the oxidizer-rich portions. Partial premixing, therefore, represents that condition when the equivalence ratio (phi) in one portion of the flowfield is greater than unity, and in another section its value is less than unity. In general, for combustion to occur efficiently, the global equivalence ratio is in the range fuel-lean to stoichiometric. These flames can be established by design by placing a fuel-rich mixture in contact with a fuel-lean mixture, but they also occur otherwise in many practical systems, which include nonpremixed lifted flames, turbulent nonpremixed combustion, spray flames, and unwanted fires. Other practical applications of PPFs are reported elsewhere. Although extensive experimental studies have been conducted on premixed and nonpremixed flames under microgravity, there is a absence of previous experimental work on burner stabilized PPFs in this regard. Previous numerical studies by our group employing a detailed numerical model showed gravity effects to be significant on the PPF structure. We report on the results of microgravity experiments conducted on two-dimensional (established on a Wolfhard-Parker slot burner) and axisymmetric flames (on a coannular burner) that were investigated in a self-contained multipurpose rig. Thermocouple and radiometer data were also used to characterize the thermal transport in the flame.

  10. Estimation of partial decoupling of cavity events

    SciTech Connect

    Garbin, H D

    1993-03-01

    One proven method of evading the detection of a nuclear test is to decouple the explosion with a large air-filled cavity. Past tests have shown it is possible to substantially reduce the seismic energy emanating from a nuclear explosion by as much as two, orders of magnitude. The problem is not whether it can be done; the problem is the expense involved in mining a large cavity to fully decouple any reasonable size test. It has been suggested that partial decoupling may exist so some fraction of decoupling may be attained between factors of 1 to 100. MISTY ECHO and MINERAL QUARRY are two nuclear tests which were instrumented to look at this concept. MISTY ECHO was a nuclear explosion conducted in an 11 m hemispherical cavity such that the walls were over driven and reacted in a non-linear manner. MINERAL QUARRY was a nearby tamped event that is used as a reference to compare with MISTY ECHO. The scaled cavity radius of MISTY ECHO was greater than 2m/kt[sup l/3]. Both of these tests had free-field accelerometers located within 400 m of their respective sources. Analysis of surface ground motion is inconclusive on the question of partial decoupling. This is due to the difference in medium properties that the ray paths take to the surface. The free-field configuration alleviates this concern. The analysis consists of cube-root signal MINERAL QUARRYs signal to MISTY ECHO's yield and calculating the ratio of the Fourier amplitudes of both the acceleration and the reduced displacement potentials. The results do not indicate the presence of partial decoupling. In fact, there is a coupling enhancement factor of 2.

  11. Estimation of partial decoupling of cavity events

    SciTech Connect

    Garbin, H.D.

    1993-03-01

    One proven method of evading the detection of a nuclear test is to decouple the explosion with a large air-filled cavity. Past tests have shown it is possible to substantially reduce the seismic energy emanating from a nuclear explosion by as much as two, orders of magnitude. The problem is not whether it can be done; the problem is the expense involved in mining a large cavity to fully decouple any reasonable size test. It has been suggested that partial decoupling may exist so some fraction of decoupling may be attained between factors of 1 to 100. MISTY ECHO and MINERAL QUARRY are two nuclear tests which were instrumented to look at this concept. MISTY ECHO was a nuclear explosion conducted in an 11 m hemispherical cavity such that the walls were over driven and reacted in a non-linear manner. MINERAL QUARRY was a nearby tamped event that is used as a reference to compare with MISTY ECHO. The scaled cavity radius of MISTY ECHO was greater than 2m/kt{sup l/3}. Both of these tests had free-field accelerometers located within 400 m of their respective sources. Analysis of surface ground motion is inconclusive on the question of partial decoupling. This is due to the difference in medium properties that the ray paths take to the surface. The free-field configuration alleviates this concern. The analysis consists of cube-root signal MINERAL QUARRYs signal to MISTY ECHO`s yield and calculating the ratio of the Fourier amplitudes of both the acceleration and the reduced displacement potentials. The results do not indicate the presence of partial decoupling. In fact, there is a coupling enhancement factor of 2.

  12. Linear partial difference equations of hypergeometric type

    NASA Astrophysics Data System (ADS)

    Rodal, J.; Area, I.; Godoy, E.

    2007-03-01

    In this paper a systematic study of the orthogonal polynomial solutions of a second order partial difference equation of hypergeometric type of two variables is done. The Pearson's systems for the orthogonality weight of the solutions and also for the difference derivatives of the solutions are presented. The orthogonality property in subspaces is treated in detail, which leads to an analog of the Rodrigues-type formula for orthogonal polynomials of two discrete variables. A classification of the admissible equations as well as some examples related with bivariate Hahn, Kravchuk, Meixner, and Charlier families, and their algebraic and difference properties are explicitly given.

  13. Average characteristics of partially coherent electromagnetic beams.

    PubMed

    Seshadri, S R

    2000-04-01

    Average characteristics of partially coherent electromagnetic beams are treated with the paraxial approximation. Azimuthally or radially polarized, azimuthally symmetric beams and linearly polarized dipolar beams are used as examples. The change in the mean squared width of the beam from its value at the location of the beam waist is found to be proportional to the square of the distance in the propagation direction. The proportionality constant is obtained in terms of the cross-spectral density as well as its spatial spectrum. The use of the cross-spectral density has advantages over the use of its spatial spectrum.

  14. Partial muscle carnitine palmitoyltransferase-A deficiency

    SciTech Connect

    Ross, N.S.; Hoppel, C.L.

    1987-01-02

    After initiation of ibuprofen therapy, a 45-year-old woman developed muscle weakness and tenderness with rhabdomyolysis, culminating in respiratory failure. A muscle biopsy specimen showed a vacuolar myopathy, and markedly decreased muscle carnitine content and carnitine palmitoyltransferase activity. Following recovery, muscle carnitine content was normal but carnitine palmitoyltransferase activity was still abnormally low. The ratio of palmitoyl-coenzyme A plus carnitine to palmitoylcarnitine oxidation by muscle mitochondria isolated from the patient was markedly decreased. The authors conclude that transiently decreased muscle carnitine content interacted with partial deficiency of carnitine palmitoyltransferase-A to produce rhabdomyolysis and respiratory failure and that ibuprofen may have precipitated the clinical event.

  15. [Partial lease squares approach to functional analysis].

    PubMed

    Preda, C

    2006-01-01

    We extend the partial least squares (PLS) approach to functional data represented in our models by sample paths of stochastic process with continuous time. Due to the infinite dimension, when functional data are used as a predictor for linear regression and classification models, the estimation problem is an ill-posed one. In this context, PLS offers a simple and efficient alternative to the methods based on the principal components of the stochastic process. We compare the results given by the PLS approach and other linear models using several datasets from economy, industry and medical fields. PMID:17124795

  16. Computing Partial Transposes and Related Entanglement Functions

    NASA Astrophysics Data System (ADS)

    Maziero, Jonas

    2016-10-01

    The partial transpose (PT) is an important function for entanglement testing and quantification and also for the study of geometrical aspects of the quantum state space. In this article, considering general bipartite and multipartite discrete systems, explicit formulas ready for the numerical implementation of the PT and of related entanglement functions are presented and the Fortran code produced for that purpose is described. What is more, we obtain an analytical expression for the Hilbert-Schmidt entanglement of two-qudit systems and for the associated closest separable state. In contrast to previous works on this matter, we only use the properties of the PT, not applying Lagrange multipliers.

  17. The geometry of the partial realization problem

    NASA Technical Reports Server (NTRS)

    Brockett, R. W.; Hall, P.

    1979-01-01

    It is shown that the space of sequences of length n which have an extrapolation of McMillan degree k, and no extrapolations of lower McMillan degree can be given the structure of a differentiable manifold. This approach makes the proof of certain known results on the partial realization problem quite straightforward and makes it possible to establish some important new results as well. A key tool is the fact, proven here, that the set of n by a real Hankel matrices of rank r is a manifold with r+1 connected components.

  18. Multiple Partial Siberian Snakes in the AGS

    SciTech Connect

    Takano, J.; Ahrens, L. A.; Bai, M.; Brown, K.; Courant, E. D.; Gardner, C. J.; Glenn, J. W.; Huang, H.; Luccio, A. U.; MacKay, W. W.; Okamura, M.; Roser, T.; Tepikian, S.; Tsoupas, N.; Yip, K.; Zelenski, A.; Zeno, K.; Hattori, T.; Lin, F.

    2007-06-13

    Polarized protons are accelerated up to 24.3 GeV in the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory (BNL). To accelerate the beam with preserving the polarization, two different types of helical dipole partial Siberian snake have been installed to the AGS. One is a superconducting magnet (Cold Snake, CSNK), and the other is a normal conducting one (Warm Snake, WSNK). With these snake magnets, the polarization at the AGS extraction achieved 65%. However, the AGS has spin mismatches at the injection and extraction. This description shows calculated results to have better spin matching with using two or three snakes.

  19. Laparoscopic partial nephrectomy in a horseshoe kidney.

    PubMed

    Molina, Wilson R; Gill, Inderbir S

    2003-12-01

    A 68-year-old man with an incidentally found 2-cm complex enhancing cystic right renal mass in the right moiety of a horseshoe kidney was treated with a three-port retroperitoneal laparoscopic approach. The tumor was completely excised with cold Endoshears, and Surgicel bolsters were tightly buttressed into the resection bed with 0 Vicryl sutures. The warm ischemia time was 31 minutes. To our knowledge, this is the initial case of retroperitoneal laparoscopic partial nephrectomy in a horseshoe kidney. Three-dimensional CT with volume rendering in a video format provides the necessary information about the number, location, and extrarenal anatomy of the renal artery and vein.

  20. Partial Arc Curvilinear Direct Drive Servomotor

    NASA Technical Reports Server (NTRS)

    Sun, Xiuhong (Inventor)

    2014-01-01

    A partial arc servomotor assembly having a curvilinear U-channel with two parallel rare earth permanent magnet plates facing each other and a pivoted ironless three phase coil armature winding moves between the plates. An encoder read head is fixed to a mounting plate above the coil armature winding and a curvilinear encoder scale is curved to be co-axis with the curvilinear U-channel permanent magnet track formed by the permanent magnet plates. Driven by a set of miniaturized power electronics devices closely looped with a positioning feedback encoder, the angular position and velocity of the pivoted payload is programmable and precisely controlled.

  1. Partial stability and stabilisation of Boolean networks

    NASA Astrophysics Data System (ADS)

    Chen, Hong-Wei; Sun, Liang-Jie; Liu, Yang

    2016-07-01

    In this paper, we investigate the stability of Boolean networks and the stabilisation of Boolean control networks with respect to part of the system's states. First, an algebraic expression of the Boolean (control) network is derived by the semi-tensor product of matrices. Then, some necessary and sufficient conditions for partial stability of Boolean networks are given. Finally, the stabilisation of Boolean control networks by a free control sequence and a state-feedback control is investigated and the respective necessary and sufficient conditions are obtained. Examples are provided to illustrate the efficiency of the obtained results.

  2. Resistance to extinction after schedules of partial delay or partial reinforcement in rats with hippocampal lesions.

    PubMed

    Rawlins, J N; Feldon, J; Ursin, H; Gray, J A

    1985-01-01

    Two experimental procedures were employed to establish the reason why hippocampal lesions apparently block the development of tolerance for aversive events in partial reinforcement experiments, but do not do so in partial punishment experiments. Rats were trained to run in a straight alley following hippocampal lesions (HC), cortical control lesions (CC) or sham operations (SO), and resistance to extinction was assessed following differing acquisition conditions. In Experiment 1 a 4-8 min inter-trial interval (ITI) was used. Either every acquisition trial was rewarded immediately (Continuous Reinforcement, CR), or only a randomly selected half of the trials were immediately rewarded, the reward being delayed for thirty seconds on the other trials (Partial Delay, PD). This delay procedure produced increased resistance to extinction in rats in all lesion groups. In Experiment 2 the ITI was reduced to a few seconds, and rats were trained either on a CR schedule, or on a schedule in which only half the trials were rewarded (Partial Reinforcement, PR). This form of partial reinforcement procedure also produced increased resistance to extinction in rats in all lesion groups. It thus appears that hippocampal lesions only prevent the development of resistance to aversive events when the interval between aversive and subsequent appetitive events exceeds some minimum value. PMID:4029302

  3. Two-dimensional echocardiographic assessment of dextrocardia: a segmental approach.

    PubMed

    Huhta, J C; Hagler, D J; Seward, J B; Tajik, A J; Julsrud, P R; Ritter, D G

    1982-12-01

    Two-dimensional echocardiography was used in the prospective evaluation of 40 patients with the clinical diagnosis of dextrocardia. A segmental analysis of the situs, connections, ventricular anatomy, and chamber positions was utilized for a complete diagnostic assessment. An adequate examination was possible in 33 of these patients; the findings were confirmed by cardiac catheterization and angiography in 31 patients and at operation in 26. Use of the location of the liver and the drainage of the hepatic veins and inferior vena cava allowed atrial visceral situs to be defined in 33 patients (solitus 21, inversus 9, and ambiguous 3). Pulmonary venous connections were correctly identified in 27. In 33 patients, atrioventricular (AV) and ventriculoarterial connections and ventricular anatomy were correctly predicted. Twenty patients had 2 separate well-developed ventricles. Ventriculoarterial connections were determined correctly in all 20 patients: concordant in 5, discordant in 6, double-outlet right ventricle in 5, and single-outlet right ventricle (pulmonary atresia) in 4. In 16 patients a ventricular septal defect was correctly identified. In the remainder the ventricular septum was intact. Thirteen patients had univentricular heart: 8 had 2 AV valves (double-inlet ventricle) 3 had common AV inlet, and 2 had atresia of 1 AV connection. Two-dimensional echocardiography allowed the accurate assessment of complex congenital heart defects associated with dextrocardia. Utilizing a segmental approach, one can correctly predict atrial-visceral situs, ventricular morphology and situs, and AV and ventriculoarterial connections.

  4. Morphological considerations pertaining to recognition of atrial isomerism. Consequences for sequential chamber localisation.

    PubMed Central

    Macartney, F J; Zuberbuhler, J R; Anderson, R H

    1980-01-01

    The atrial morphology and venous connections were assessed "blind" in 51 necropsy specimens from patients with visceral heterotaxy. This was compared with bronchial morphology as established by dissection. Six specimens were found to have both atria and bronchi in situs solitus or inversus, and were rejected. In the remainder, atrial isomerism was diagnosed, though this required minor revision of the atrial assessment in two patients. Thirty-four patients had isomeric right atria and bronchi, while 11 had isomeric left atria and bronchi. In seven cases, splenic status was unknown, but in seven of the remaining 38 (18.4%) atrial isomerism was not associated with either asplenia or polysplenia. Nevertheless, right isomerism was strongly associated with total anomalous pulmonary venous drainage (as is asplenia) and left isomerism was likewise associated with interruption of the inferior vena cava (as is polysplenia). Bilateral superior venae cavae and hepatic veins, and absence of the coronary sinus, were frequent in both forms of isomerism (as they are in asplenia and polysplenia). These findings suggest that atrial situs can be defined as solitus inversus, right isomerism, and left isomerism. This determination of atrial situs is quite independent of any other abnormalities of visceral situs. The high incidence of anomalies of both venous return and common atrium resulted in presumed complete mixing of blood at atrial level in all but one patient (97.8%), making the haemodynamic connection between atria and ventricles almost always ambiguous. To describe this anatomical connection as ambiguous when there are two ventricles present is therefore no more than recognition of anatomical and haemodynamic reality. Images PMID:7459148

  5. PARTIAL TRISOMY 4p AND PARTIAL MONOSOMY 13q: CASE REPORT AND A LITERATURE REVIEW.

    PubMed

    Puvabanditsin, S; Herrera-Garcia, G; Gengel, N; Hussein, K; February, M; Mayne, J; Mehta, R

    2016-01-01

    We report on a term first born dichorionic-diamniotic twin with deletion of the distal long arm of chromosome 13, partial trisomy of the short arm of chromosome 4, intrauterine growth retardation, and multiple anomalies including microcephaly, colpocephaly, absent corpus callosum, bulbous tip of the nose, large and low set ears, macroglossia, thin upper lip, double outlet right ventricle, atria/ventricular septal defect, cleft mitral valve, pulmonary stenosis, single umbilical artery, multicystic dysplastic left kidney, sacral dimple, anterior displacement of anus, simian creases, abnormal thumb (congenital clasped thumb), overlapping toes, and congenital hypothyroidism. This is the first report of a patient with partial trisomy 4p and partial monosomy 13q. PMID:27192890

  6. Partial spatial coherence and partial polarization in random evanescent fields on lossless interfaces.

    PubMed

    Norrman, Andreas; Setälä, Tero; Friberg, Ari T

    2011-03-01

    We consider partial spatial coherence and partial polarization of purely evanescent optical fields generated in total internal reflection at an interface of two dielectric (lossless) media. Making use of the electromagnetic degree of coherence, we show that, in such fields, the coherence length can be notably shorter than the light's vacuum wavelength, especially at a high-index-contrast interface. Physical explanation for this behavior, analogous to the generation of incoherent light in a multimode laser, is provided. We also analyze the degree of polarization by using a recent three-dimensional formulation and show that the field may be partially polarized at a subwavelength distance from the surface even though it is fully polarized farther away. The degree of polarization can assume values unattainable by beamlike fields, indicating that electromagnetic evanescent waves generally are genuine three-dimensional fields. The results can find applications in near-field optics and nanophotonics.

  7. Preparation of partially decaffeinated instant green tea.

    PubMed

    Ye, Jian-Hui; Liang, Yue-Rong; Jin, Jing; Liang, Hue-Ling; Du, Ying-Ying; Lu, Jian-Liang; Ye, Qian; Lin, Chen

    2007-05-01

    The caffeine level of instant tea extracted from decaffeinated leaf tea with 4.0 mg g-1 caffeine is commonly above 10.0 mg g-1, the maximum limit of caffeine for decaffeinated instant tea. Further removal of caffeine by active carbon (AC) from the green tea extract was investigated. It showed that the removal of caffeine from the tea extract solutions depended on the treatment time and tea extract concentration while the ethanol concentration and pH had little effect on the removal of caffeine. According to the removal of caffeine and the ratio of total catechins to caffeine in the tested samples, the optimum decaffeination conditions were determined to be as follows: tea extract concentration 15-30 g L-1 for common tea extract but higher for partially decaffeinated tea leaf extract; ratio of tea solution to AC, 100 mL:4 g; treatment time, 4 h; and natural tea extract pH. Instant tea powder extracted from partially decaffeinated leaf tea with a caffeine level of 4.03 mg g-1 and further decaffeinated by AC had a caffeine level of 7.81 mg g-1, which was 31% lower than that without AC treatment.

  8. Alcalase rapeseed inhibitors: purification and partial characterization.

    PubMed

    Vioque, J; Sánchez-Vioque, R; Clemente, A; Pedroche, J; Mar Yust, M; Millán, F

    2001-01-01

    Extensive rapeseed protein hydrolysate obtained sequentially with Alcalase and Flavourzyme showed inhibitory activity towards Alcalase. Inhibitory activity decreased as the hydrolytic process progressed probably by heat denaturation and/or partial protease degradation. Alcalase rapeseed inhibitors were purified by gel filtration and subsequent ion exchange chromatography. They are composed of peptides of 8.4 and 6.1 kDa linked by interchain disulphide bonds, as observed by reducing SDS-PAGE, with a native molecular weight of 18 kDa. Aminoacid composition of the inhibitors was characterized by the high proportion of methionine (4.2%) and cysteine (4.6%). Alcalase inhibitors were partially resistant to heat treatment; after heating at 70 degrees C for 45 minutes more than 50% of the original inhibitory activity remained in the purified protein but after heating at 90 degrees C for 5 minutes, inhibitory activity decreased very fast to a basal level. The possible relation of these protease inhibitors with the 2S albumin storage proteins is discussed.

  9. Partial volume correction using cortical surfaces

    NASA Astrophysics Data System (ADS)

    Blaasvær, Kamille R.; Haubro, Camilla D.; Eskildsen, Simon F.; Borghammer, Per; Otzen, Daniel; Ostergaard, Lasse R.

    2010-03-01

    Partial volume effect (PVE) in positron emission tomography (PET) leads to inaccurate estimation of regional metabolic activities among neighbouring tissues with different tracer concentration. This may be one of the main limiting factors in the utilization of PET in clinical practice. Partial volume correction (PVC) methods have been widely studied to address this issue. MRI based PVC methods are well-established.1 Their performance depend on the quality of the co-registration of the MR and PET dataset, on the correctness of the estimated point-spread function (PSF) of the PET scanner and largely on the performance of the segmentation method that divide the brain into brain tissue compartments.1, 2 In the present study a method for PVC is suggested, that utilizes cortical surfaces, to obtain detailed anatomical information. The objectives are to improve the performance of PVC, facilitate a study of the relationship between metabolic activity in the cerebral cortex and cortical thicknesses, and to obtain an improved visualization of PET data. The gray matter metabolic activity after performing PVC was recovered by 99.7 - 99.8 % , in relation to the true activity when testing on simple simulated data with different PSFs and by 97.9 - 100 % when testing on simulated brain PET data at different cortical thicknesses. When studying the relationship between metabolic activities and anatomical structures it was shown on simulated brain PET data, that it is important to correct for PVE in order to get the true relationship.

  10. Laparoscopic partial nephrectomy and wedge resection.

    PubMed

    Kozlowski, P M; Winfield, H N

    2000-12-01

    Partial nephrectomy is a more challenging operation than radical or simple nephrectomy, primarily because of the risk of complications such as bleeding. This problem is even more troublesome with minimally invasive approaches because of the dearth of effective hemostatic instruments and supplies. The location of the lesion determines whether a transperitoneal or a retroperitoneal route will be employed. Centrally located or anterior renal lesions generally are approached transperitoneally whereas peripheral lateral or posterior lesions are accessed by retroperitoneoscopy. The Harmonic Scalpel with slow cutting and high coagulation settings is useful for incising the renal capsule and parenchyma. The argon beam coagulator is helpful to stop any persistent bleeding. The few reported series of laparoscopic partial nephrectomy indicate considerably longer operative times than are needed for open surgery and hospitalization of upwards of 5 days, largely to monitor drainage and urine leakage. It is hoped that this advanced laparoscopic technique will become more user friendly with further developments in techniques and instrumentation to provide patients with the expected benefits of minimally invasive surgery.

  11. Controllability of the better chosen partial networks

    NASA Astrophysics Data System (ADS)

    Liu, Xueming; Pan, Linqiang

    2016-08-01

    How to control large complex networks is a great challenge. Recent studies have proved that the whole network can be sufficiently steered by injecting control signals into a minimum set of driver nodes, and the minimum numbers of driver nodes for many real networks are high, indicating that it is difficult to control them. For some large natural and technological networks, it is impossible and not feasible to control the full network. For example, in biological networks like large-scale gene regulatory networks it is impossible to control all the genes. This prompts us to explore the question how to choose partial networks that are easy for controlling and important in networked systems. In this work, we propose a method to achieve this goal. By computing the minimum driver nodes densities of the partial networks of Erdös-Rényi (ER) networks, scale-free (SF) networks and 23 real networks, we find that our method performs better than random method that chooses nodes randomly. Moreover, we find that the nodes chosen by our method tend to be the essential elements of the whole systems, via studying the nodes chosen by our method of a real human signaling network and a human protein interaction network and discovering that the chosen nodes from these networks tend to be cancer-associated genes. The implementation of our method shows some interesting connections between the structure and the controllability of networks, improving our understanding of the control principles of complex systems.

  12. A NUCLEAR MEMBRANE CHANGE AFTER PARTIAL HEPATECTOMY

    PubMed Central

    Kishimoto, Susumu; Lieberman, Irving

    1964-01-01

    Partial hepatectomy (67 per cent extirpation) of the rat leads to a change in the membrane of liver nuclei (purified with citric acid) detectable as an increase in electrophoretic mobility. No change is detectable 2 hours after the operation, but between 2 and 6 hours about a 1.4-fold increase in mobility occurs after which the mobility becomes constant at the elevated level. Removal of only 10 per cent of the liver causes no detectable change in 6 hours. Bilateral adrenalectomy immediately before partial hepatectomy does not affect the development of the nuclear change. Actinomycin D and p-fluorophenylalanine, but not noradrenalin, ionizing radiation, or EDTA, suppress the increase in electrophoretic mobility. The level of actinomycin D required to block the nuclear membrane change is 6 times greater than that necessary to prevent the rate increase in hepatic RNA metabolism that follows removal of part of the liver. This discrepancy and the difference in the response to noradrenalin indicate that, at least initially, the nuclear membrane change and the change in the rate of RNA synthesis are independent processes. The inability of EDTA to block the nuclear membrane change shows that the Zn++ requirement for DNA replication is not related to the events that lead to the alteration in the electrokinetic properties of liver nuclei. PMID:14245434

  13. Preparation of partially decaffeinated instant green tea.

    PubMed

    Ye, Jian-Hui; Liang, Yue-Rong; Jin, Jing; Liang, Hue-Ling; Du, Ying-Ying; Lu, Jian-Liang; Ye, Qian; Lin, Chen

    2007-05-01

    The caffeine level of instant tea extracted from decaffeinated leaf tea with 4.0 mg g-1 caffeine is commonly above 10.0 mg g-1, the maximum limit of caffeine for decaffeinated instant tea. Further removal of caffeine by active carbon (AC) from the green tea extract was investigated. It showed that the removal of caffeine from the tea extract solutions depended on the treatment time and tea extract concentration while the ethanol concentration and pH had little effect on the removal of caffeine. According to the removal of caffeine and the ratio of total catechins to caffeine in the tested samples, the optimum decaffeination conditions were determined to be as follows: tea extract concentration 15-30 g L-1 for common tea extract but higher for partially decaffeinated tea leaf extract; ratio of tea solution to AC, 100 mL:4 g; treatment time, 4 h; and natural tea extract pH. Instant tea powder extracted from partially decaffeinated leaf tea with a caffeine level of 4.03 mg g-1 and further decaffeinated by AC had a caffeine level of 7.81 mg g-1, which was 31% lower than that without AC treatment. PMID:17407319

  14. Adaptive Estimation with Partially Overlapping Models

    PubMed Central

    Shin, Sunyoung; Fine, Jason; Liu, Yufeng

    2015-01-01

    In many problems, one has several models of interest that capture key parameters describing the distribution of the data. Partially overlapping models are taken as models in which at least one covariate effect is common to the models. A priori knowledge of such structure enables efficient estimation of all model parameters. However, in practice, this structure may be unknown. We propose adaptive composite M-estimation (ACME) for partially overlapping models using a composite loss function, which is a linear combination of loss functions defining the individual models. Penalization is applied to pairwise differences of parameters across models, resulting in data driven identification of the overlap structure. Further penalization is imposed on the individual parameters, enabling sparse estimation in the regression setting. The recovery of the overlap structure enables more efficient parameter estimation. An oracle result is established. Simulation studies illustrate the advantages of ACME over existing methods that fit individual models separately or make strong a priori assumption about the overlap structure. PMID:26917931

  15. An Ultrasonic Clamp for Bloodless Partial Nephrectomy

    NASA Astrophysics Data System (ADS)

    Lafon, Cyril; Bouchoux, Guillaume; Murat, François Joseph; Birer, Alain; Theillère, Yves; Chapelon, Jean Yves; Cathignol, Dominique

    2007-05-01

    Maximum conservation of the kidney is preferable through partial nephrectomy for patients at risk of disease recurrence of renal cancers. Haemostatic tools are needed in order to achieve bloodless surgery and reduce post surgery morbidity. Two piezo-ceramic transducers operating at a frequency of 4 MHz were mounted on each arm of a clamp. When used for coagulation purposes, two transducers situated on opposite arms of the clamp were driven simultaneously. Heat delivery was optimized as each transducers mirrored back to targeted tissues the wave generated by the opposite transducer. Real-time treatment monitoring with an echo-based technique was also envisaged with this clamp. Therapy was periodically interrupted so one transducer could generate a pulse. The echo returning from the opposite transducer was treated. Coagulation necroses were obtained in vitro on substantial thicknesses (23-38mm) of pig liver over exposure durations ranging from 30s to 130s, and with acoustic intensities of less than 15W/cm2 per transducer. Both kidneys of two pigs were treated in vivo with the clamp (14.5W/cm2 for 90s), and the partial nephrectomies performed proved to be bloodless. In vitro and in vivo, wide transfixing lesions corresponded to an echo energy decrease superior to -10dB and parabolic form of the time of flight versus treatment time. In conclusion, this ultrasound clamp has proven to be an excellent mean for achieving monitored haemostasis in kidney.

  16. Partial pressure analysis in space testing

    NASA Technical Reports Server (NTRS)

    Tilford, Charles R.

    1994-01-01

    For vacuum-system or test-article analysis it is often desirable to know the species and partial pressures of the vacuum gases. Residual gas or Partial Pressure Analyzers (PPA's) are commonly used for this purpose. These are mass spectrometer-type instruments, most commonly employing quadrupole filters. These instruments can be extremely useful, but they should be used with caution. Depending on the instrument design, calibration procedures, and conditions of use, measurements made with these instruments can be accurate to within a few percent, or in error by two or more orders of magnitude. Significant sources of error can include relative gas sensitivities that differ from handbook values by an order of magnitude, changes in sensitivity with pressure by as much as two orders of magnitude, changes in sensitivity with time after exposure to chemically active gases, and the dependence of the sensitivity for one gas on the pressures of other gases. However, for most instruments, these errors can be greatly reduced with proper operating procedures and conditions of use. In this paper, data are presented illustrating performance characteristics for different instruments and gases, operating parameters are recommended to minimize some errors, and calibrations procedures are described that can detect and/or correct other errors.

  17. Partial facetectomy for lumbar foraminal stenosis.

    PubMed

    Kang, Kevin; Rodriguez-Olaverri, Juan Carlos; Schwab, Frank; Hashem, Jenifer; Razi, Afshin; Farcy, Jean Pierre

    2014-01-01

    Background. Several different techniques exist to address the pain and disability caused by isolated nerve root impingement. Failure to adequately decompress the lumbar foramen may lead to failed back surgery syndrome. However, aggressive treatment often causes spinal instability or may require fusion for satisfactory results. We describe a novel technique for decompression of the lumbar nerve root and demonstrate its effectiveness in relief of radicular symptoms. Methods. Partial facetectomy was performed by removal of the medial portion of the superior facet in patients with lumbar foraminal stenosis. 47 patients underwent the procedure from 2001 to 2010. Those who demonstrated neurogenic claudication without spinal instability or central canal stenosis and failed conservative management were eligible for the procedure. Functional level was recorded for each patient. These patients were followed for an average of 3.9 years to evaluate outcomes. Results. 27 of 47 patients (57%) reported no back pain and no functional limitations. Eight of 47 patients (17%) reported moderate pain, but had no limitations. Six of 47 patients (13%) continued to experience degenerative symptoms. Five of 47 patients (11%) required additional surgery. Conclusions. Partial facetectomy is an effective means to decompress the lumbar nerve root foramen without causing spinal instability.

  18. Genetics Home Reference: autosomal dominant partial epilepsy with auditory features

    MedlinePlus

    ... Genetics Home Health Conditions ADPEAF autosomal dominant partial epilepsy with auditory features Enable Javascript to view the ... Open All Close All Description Autosomal dominant partial epilepsy with auditory features ( ADPEAF ) is an uncommon form ...

  19. Partial oxidation power plant with reheating and method thereof

    DOEpatents

    Newby, Richard A.; Yang, Wen-Ching; Bannister, Ronald L.

    1999-01-01

    A system and method for generating power having an air compression/partial oxidation system, a turbine, and a primary combustion system. The air compression/partial oxidation system receives a first air stream and a fuel stream and produces a first partially oxidized fuel stream and a first compressed air stream therefrom. The turbine expands the first partially oxidized fuel stream while being cooled by the first compressed air stream to produce a heated air stream. The heated air stream is injected into the expanding first partially oxidized fuel stream, thereby reheating it in the turbine. A second partially oxidized fuel stream is emitted from the turbine. The primary combustion system receives said second partially oxidized fuel stream and a second air stream, combusts said second partially oxidized fuel stream, and produces rotating shaft power and an emission stream therefrom.

  20. Partial oxidation power plant with reheating and method thereof

    DOEpatents

    Newby, R.A.; Yang, W.C.; Bannister, R.L.

    1999-08-10

    A system and method are disclosed for generating power having an air compression/partial oxidation system, a turbine, and a primary combustion system. The air compression/partial oxidation system receives a first air stream and a fuel stream and produces a first partially oxidized fuel stream and a first compressed air stream therefrom. The turbine expands the first partially oxidized fuel stream while being cooled by the first compressed air stream to produce a heated air stream. The heated air stream is injected into the expanding first partially oxidized fuel stream, thereby reheating it in the turbine. A second partially oxidized fuel stream is emitted from the turbine. The primary combustion system receives said second partially oxidized fuel stream and a second air stream, combusts said second partially oxidized fuel stream, and produces rotating shaft power and an emission stream therefrom. 2 figs.

  1. 48 CFR 819.502-3 - Partial set-asides.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Partial set-asides. 819... SOCIOECONOMIC PROGRAMS SMALL BUSINESS PROGRAMS Set-Asides for Small Business 819.502-3 Partial set-asides. When... particular procurement will be partially set aside for small business participation, the solicitation...

  2. 48 CFR 1319.502-3 - Partial set-asides.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Partial set-asides. 1319... PROGRAMS SMALL BUSINESS PROGRAMS Set-Asides for Small Business 1319.502-3 Partial set-asides. A partial set... and one small) will respond with offers unless the set-aside is authorized by the designee set...

  3. 42 CFR 488.715 - Partial extended surveys.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 42 Public Health 5 2014-10-01 2014-10-01 false Partial extended surveys. 488.715 Section 488.715... (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES Survey and Certification of Home Health Agencies § 488.715 Partial extended surveys. A partial extended survey is...

  4. 42 CFR 488.715 - Partial extended surveys.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 42 Public Health 5 2013-10-01 2013-10-01 false Partial extended surveys. 488.715 Section 488.715... (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES Survey and Certification of Home Health Agencies § 488.715 Partial extended surveys. A partial extended survey is...

  5. A Potential Cost Effective Liquefaction Mitigation Countermeasure: Induced Partial Saturation

    SciTech Connect

    Bian Hanbing; Jia Yun; Shahrour, Isam

    2008-07-08

    This work is devoted to illustrate the potential liquefaction mitigation countermeasure: Induced Partial Saturation. Firstly the potential liquefaction mitigation method is briefly introduced. Then the numerical model for partially saturated sandy soil is presented. At last the dynamic responses of liquefiable free filed with different water saturation is given. It shows that the induced partial saturation is efficiency for preventing the liquefaction.

  6. Viscous fingering with partially miscible fluids

    NASA Astrophysics Data System (ADS)

    Fu, X.; Cueto-Felgueroso, L.; Juanes, R.

    2015-12-01

    When a less viscous fluid displaces a more viscous fluid, the contrast in viscosity destabilizes the interface between the two fluids, leading to the formation of fingers. Experimental and numerical studies of viscous fingering have focused on fluids that are either fully miscible (e.g. water and glycerol) or perfectly immiscible (e.g. water and oil). In practice, however, the miscibility of two fluids can change appreciably with temperature and pressure, and often falls into the case of partial miscibility, where two fluids have limited solubility in each other (e.g. CO2 and water). Following our recent work for miscible systems (Jha et al., PRL 2011, 2013) and immiscible systems (Cueto-Felgueroso and Juanes, PRL 2012, JFM 2014), here we propose a phase-field model for fluid-fluid displacements in a porous medium, when the two fluids have limited (but nonzero) solubility in one another. In our model, partial miscibility is characterized through the design of the thermodynamic free energy of the two-fluid system. We express the model in dimensionless form and elucidate the key dimensionless groups that control the behavior of the system. We present high-resolution numerical simulations of the model applied to the viscous fingering problem. On one hand, we demonstrate the effect of partial miscibility on the hydrodynamic instability. On the other, we elucidate the role of the degree of fingering on the rate of mutual fluid dissolution. Figure caption: final snapshots in simulations of viscous fingering with a two-fluid system mimicking that of CO2 and water. The colormap corresponds to the concentration of CO2. A band of less viscous gas phase rich in CO2 (red) displaces through the more viscous liquid phase that is undersaturated with CO2 (blue). At the fluid interface, an exchange of CO2 occurs as a result of local chemical potentials that drives the system towards thermodynamic equilibrium. This results in a shrinkage of gas phase as well as a local increase in

  7. Wave Attenuation in Partially Saturated Porous Solids.

    NASA Astrophysics Data System (ADS)

    Yin, Chuan-Sheng

    1992-01-01

    This thesis consists of three independent papers. Paper 1 studies effects of pulsating gas pockets on wave propagation in partially saturated porous solids containing both liquid and gas phases. On the basis of Biot theory, an analytic solution for the White model for study of the effects of saturation history on wave attenuation is derived. One of the most significant findings of this work is that when the average spacing among the neighboring gas pockets is of the order of the boundary-layer thickness associated with the slow compressional (or P2) wave, the attenuation of the compressional (or P) wave due to local fluid flow reaches its maximum. Results of Paper 1 bear direct applications to seismic and logging responses of partially saturated rocks in prospecting for petroleum, and monitoring of oil and natural gas reservoirs. Paper 2 presents the results of the experimental studies of the effects of partial liquid/gas saturation on extensional wave attenuation in Berea sandstones. Two experimental methods are used; one is the resonant-bar method and the other the forced-deformation method. It is found that the wave attenuation depends on sample-saturation history (drainage or imbibition), as well as boundary-flow conditions, and the degree of saturation. The attenuation caused by "flowable" liquid is sensitive only in the region of low degree of gas saturation. An open-pore boundary tends to induce higher attenuation. The results obtained by the forced-deformation method show that the magnitude of the attenuation decreases substantially with decreasing frequency to the extent that no attenuation peak was apparent at frequencies below 100 Hz. Paper 3 analyzes extensional wave propagation in a porous fluid-saturated hollow-cylinder of infinite extent. Analytic solutions of complex Young's modulus for the long wavelength limit was obtained for a hollow -cylinder with open-pore inner surface. A simplified formula for estimating the frequency at which the

  8. Grain boundary wetness of partially molten dunite

    NASA Astrophysics Data System (ADS)

    Mu, S.; Faul, U.

    2013-12-01

    The grain scale melt distribution plays a key role for physical properties of partially molten regions in Earth's upper mantle, but our current understanding of the distribution of basaltic melt at the grain scale is still incomplete. A recent experimental study shows that wetted two-grain boundaries are a common feature of partially molten dunite at small melt fractions (Garapic et al., G3, 2013). In early ideal models which assume isotropic surface energy, the grain scale melt distribution is uniquely determined by knowing the melt fraction and the dihedral angle between two crystalline grains and the melt (von Bargen and Waff, JGR, 1986). Olivine is anisotropic in surface energy, hence the grain scale melt distribution at given melt fraction cannot be characterized by the dihedral angle alone. The grain boundary wetness, which is defined as the ratio of solid-liquid boundary area over the total interfacial area (Takei, JGR, 1998), is a more objective measure of the grain scale melt distribution. The aim of this study is to quantify the relationship between grain size, melt fraction, temperature and grain boundary wetness of partially molten dunite under dry conditions. We annealed olivine-basalt aggregates with melt fractions from 0.03% to 6% at a range of temperatures and 1 GPa in a piston cylinder for 1 to 336 hours, with resulting mean grain sizes of 10 to 60 μm. The samples were sectioned, polished and imaged at high resolution by using a field emission SEM. Each image had a size of 2048 x 1536 pixels with a resolution of 0.014 to 0.029 μm/pixel, depending on magnification. For each sample, depending on grain sizes, we made mosaics of 3 x 3 or 6 x 6 overlapping images. Measurements of melt fraction, grain boundary wetness and grain size were carried out on these high resolution mosaics by using ImageJ software. Analyses of mosaics show that grain boundary wetness increases with increasing melt fraction at constant grain size to values well above those

  9. Reaction Infiltration Instabilities in Partially Molten Rocks

    NASA Astrophysics Data System (ADS)

    Pec, M.; Holtzman, B. K.; Zimmerman, M. E.; Kohlstedt, D. L.

    2015-12-01

    Tabular dunites in ophiolites are thought to form high-permeability, melt channels due to a positive feedback between melt flow and melt-solid reaction in the upper mantle. Reaction-infiltration instability (RII) theory predicts whether or not channels emerge from background flow. To test the applicability of RII theory to mantle rocks, we sandwiched a partially molten rock between a melt reservoir and a porous sink. Hot-pressed 50:50 mixtures of olivine (Ol) and clinopyroxene (Cpx) with either 4, 10 or 20 vol% alkali basalt formed ~4 mm long cylinders of partially molten rock. Source and sink are disks of alkali basalt and porous alumina. We annealed the melt-rock-sink triplets for up to 5 h at a confining pressure of Pc=300 MPa with effective pressure Pe=0 to 299.9 MPa at T=1200° or 1250°C. The melt fraction in the partially molten rock influences the permeability, which, together with the applied pressure gradient, controls the melt migration velocity. The temperature influences the reaction rate. Melt velocity and reaction rate are fundamental parameters in RII theory. In experiments, two distinct features form due to melt migration, 1) a planar reaction layer (RL) and 2) finger-shaped channels. Both the RL and the channels contain Ol+melt with no Cpx, indicating that the reaction melt1+Cpx→melt2+Ol occurs. The channels develop only if the melt velocity is >5µm/s. Once a channel reaches the porous sink, a large increase in the effective permeability is detected. The morphology and spacing of the channels depends on the initial melt fraction. With 20 vol% melt, multiple, voluminous channels with a spacing of 1.8±0.5 mm develop. At lower melt contents, fewer, thinner channels with a spacing of ~3 mm develop. The channel spacing predicted by theory is about a factor 2-4 smaller than observed. Our results indicate that RII theory provides a solid framework for investigating melt migration in experiments and potentially a basis for extrapolation to mantle

  10. 76 FR 25177 - Determinations Concerning Need for Error Correction, Partial Approval and Partial Disapproval...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-03

    ... Significant Deterioration and Title V Greenhouse Gas Tailoring Rule; Final Rule. 75 FR 31,514 (June 3, 2010...-National Ambient Air Quality Standard (NAAQS) pollutants, among them greenhouse gases (GHGs). The partial... are able to proceed with plans to construct or expand. DATES: This action is effective on May 1,...

  11. Partial oxidation process with extractant purification

    SciTech Connect

    Stellaccio, R.J.

    1983-09-06

    A partial oxidation process is disclosed with an extractant purifier for removing the particulate carbon entrained in a vaporized stream of normally liquid organic extractant-carbon-water dispersion from a decanter and producing a clean vaporized mixture of liquid organic extractant and water and a separate liquid stream of liquid hydrocarbonaceous fuel-carbon dispersion. The extractant purifier comprises a closed, vertical, cylindrical, thermally insulated vessel with an unobstructed central passage. Supported in the upper section of the vessel is a gas-solids separator for separating the particulate carbon from the vaporized dispersion flowing up the vessel and discharging the particulate carbon into atomized liquid hydrocarbon fuel located within the lower section of the purifier.

  12. Algorithm refinement for stochastic partial differential equations.

    SciTech Connect

    Alexander, F. J.; Garcia, Alejandro L.,; Tartakovsky, D. M.

    2001-01-01

    A hybrid particle/continuum algorithm is formulated for Fickian diffusion in the fluctuating hydrodynamic limit. The particles are taken as independent random walkers; the fluctuating diffusion equation is solved by finite differences with deterministic and white-noise fluxes. At the interface between the particle and continuum computations the coupling is by flux matching, giving exact mass conservation. This methodology is an extension of Adaptive Mesh and Algorithm Refinement to stochastic partial differential equations. A variety of numerical experiments were performed for both steady and time-dependent scenarios. In all cases the mean and variance of density are captured correctly by the stochastic hybrid algorithm. For a non-stochastic version (i.e., using only deterministic continuum fluxes) the mean density is correct, but the variance is reduced except within the particle region, far from the interface. Extensions of the methodology to fluid mechanics applications are discussed.

  13. Development of partially fluorinated resin apex seals

    NASA Technical Reports Server (NTRS)

    Green, H. E.; Chang, G. E. C.; Powell, S. H.; Yates, K.

    1984-01-01

    Partially fluorinated polyimides were prepared and molded in the form of discs and pins for test as potential apex seal materials for advanced rotary combustion engines. The polyimides were formulated from the diamine 2,2-bis 4-(4-aminophenoxy)phenyl hexafluoropropane (4-BDAF) and the dianhydrides of pyromellitic acid (PMDA) and benzophenonetetracarboxylic acid (BTDA). Tribological testing was performed at sliding speeds of 0.31 to 11.6 m/s and at temperatures of from 298K to 573K. It is shown that the carbon fiber filled polyimides, particularly the 80/20 compositions, have an excellent balance of wear/friction at 573K. The unfilled, 80/20 and 60/40 compositions indicate an unusual combination of high friction and low wear which may be advantageous in such applications as brakes and traction drives.

  14. Breakdown and partial discharges in magnetic liquids.

    PubMed

    Herchl, F; Marton, K; Tomčo, L; Kopčanský, P; Timko, M; Koneracká, M; Kolcunová, I

    2008-05-21

    The dielectric properties (permittivity, loss factor, dielectric breakdown strength) of magnetic liquids were investigated. The magnetic liquids were composed of magnetite particles coated with oleic acid as surfactant and dispersed in transformer oil. To determine their dielectric properties they were subjected to a uniform magnetic field at high alternating electric fields up to 14 MV m(-1). Nearly constant permittivity of magnetic liquid with particle volume concentration Φ = 0.0019 as a function of electric field was observed. Magnetic liquids with concentrations Φ = 0.019 and 0.032 showed significant changes of permittivity and loss factor dependent on electric and magnetic fields. The best concentration of magnetic fluid was found at which partial current impulse magnitudes were the lowest. The breakdown strength distribution of the magnetic liquid with Φ = 0.0025 was fitted with the Duxbury-Leath, Weibull and Gauss distribution functions. PMID:21694240

  15. Flame propagation in partially premixed conditions

    NASA Astrophysics Data System (ADS)

    Ruetsch, G.; Poinsot, T.; Veynante, D.; Trouvé, A.

    1996-11-01

    Turbulent flame propagation is studied under inhomogenously premixed conditions via data from direct numerical simulations. Departures from the premixed case are studied using four different configurations, ranging from one dimensional unsteady flames to turbulent three-dimensional simulations. Simulations are performed in these cases with various values of the mean equivalence ratio, fluctuations about the mean equivlalence ratio, correlation length scales, and probability denisty functions of the mixture composition. Propagation characteristics are described in terms of the flamelet approach, where the the main contribution of partial premixing on flame propagation is due to flame wrinkling relative to modification of the mean flamelet structure. This behavior is consistent over a broad range of conditions, with the exception being extreme departures from stoichiometric conditions where flamability limits are exceeded and flame quenching is observed.

  16. Electrowetting of partially wetting thin nanofluid films.

    PubMed

    Chakraborty, Monojit; Chatterjee, Rahul; Ghosh, Udita Uday; DasGupta, Sunando

    2015-04-14

    It is observed that the presence of negatively charged, suspended nanoparticles significantly changes the electric-field-induced spreading and contact line dynamics of partially wetting liquid films. Image-analyzing interferometry is used to accurately measure the meniscus profile, including the spatial change in the meniscus curvature. The nanoparticle-containing meniscus exhibits enhanced spreading with an increase in the particle size and weight fraction. The instantaneous contact line velocities are measured using video microscopy and a frame-by-frame analysis of the extracted images. The effects of electric field polarity reversal on the flow toward the contact line are explored as well. The movement of the meniscus is analyzed taking into account the capillary forces and Maxwell-stress-induced flows. An analytical model based on the Young-Laplace equation is used to analyze the electric-field-induced contact line motion, and the model-predicted velocities are compared to the experiments. PMID:25790194

  17. Partial Differential Algebraic Sensitivity Analysis Code

    1995-05-15

    PDASAC solves stiff, nonlinear initial-boundary-value in a timelike dimension t and a space dimension x. Plane, circular cylindrical or spherical boundaries can be handled. Mixed-order systems of partial differential and algebraic equations can be analyzed with members of order or 0 or 1 in t, 0,1 or 2 in x. Parametric sensitivities of the calculated states are compted simultaneously on request, via the Jacobian of the state equations. Initial and boundary conditions are efficiently reconciled.more » Local error control (in the max-norm or the 2-norm) is provided for the state vector and can include the parametric sensitivites if desired.« less

  18. Extrapolation methods for dynamic partial differential equations

    NASA Technical Reports Server (NTRS)

    Turkel, E.

    1978-01-01

    Several extrapolation procedures are presented for increasing the order of accuracy in time for evolutionary partial differential equations. These formulas are based on finite difference schemes in both the spatial and temporal directions. On practical grounds the methods are restricted to schemes that are fourth order in time and either second, fourth or sixth order in space. For hyperbolic problems the second order in space methods are not useful while the fourth order methods offer no advantage over the Kreiss-Oliger method unless very fine meshes are used. Advantages are first achieved using sixth order methods in space coupled with fourth order accuracy in time. Computational results are presented confirming the analytic discussions.

  19. Lithiation of Silica through Partial Reduction

    SciTech Connect

    Ban, C.; Kappes, B. B.; Xu, Q.; Engtrakul, C.; Ciobanu, C. V.; Dillon, A. C.; Zhao, Y.

    2012-06-11

    We demonstrate the reversible lithiation of SiO{sub 2} up to 2/3 Li per Si, and propose a mechanism for it based on molecular dynamics and density functional theory simulations. Our calculations show that neither interstitial Li (no reduction), nor the formation of Li{sub 2}O clusters and Si-Si bonds (full reduction) are energetically favorable. Rather, two Li effectively break a Si-O bond and become stabilized by oxygen, thus partially reducing the SiO{sub 2} anode: this leads to increased anode capacity when the reduction occurs at the Si/SiO{sub 2} interface. The resulting Li{sub x}SiO{sub 2} (x < 2/3) compounds have band-gaps in the range of 2.0-3.4 eV.

  20. Partial recovery of microbiomes after antibiotic treatment.

    PubMed

    Raymond, Frédéric; Déraspe, Maxime; Boissinot, Maurice; Bergeron, Michel G; Corbeil, Jacques

    2016-09-01

    Antibiotics profoundly affect the gut microbiome and modulate microbial communities. We recently observed that antimicrobial drugs also impact the abundance and distribution of antibiotic resistance genes. In this addendum, we reanalyze our ∼1 trillion nucleotide shotgun metagenomic dataset to quantify comprehensive genomic differences at the sequence level before and after antibiotic treatment. We show that 7 day exposure to cefprozil leads to a statistically significant loss of metagenome sequences. Recovery of gut microbiomes 3 months after antibiotherapy was characterized by the emergence of new genome sequences not observed prior to antibiotic exposure. Participants with low initial gut microbiome diversity had an increased amount of sequences related to antibiotic resistance. Therefore, we suggest that while the taxonomical composition of microbiomes is partially affected by the antibiotic, the genomic content and population structure of bacterial communities is noticeably impacted. PMID:27494088

  1. NEUTRINO PROCESSES IN PARTIALLY DEGENERATE NEUTRON MATTER

    SciTech Connect

    Bacca, S.; Hally, K.; Liebendoerfer, M.; Perego, A.; Pethick, C. J.; Schwenk, A.

    2012-10-10

    We investigate neutrino processes for conditions reached in simulations of core-collapse supernovae. In regions where neutrino-matter interactions play an important role, matter is partially degenerate, and we extend earlier work that addressed the degenerate regime. We derive expressions for the spin structure factor in neutron matter, which is a key quantity required for evaluating rates of neutrino processes. We show that, for essentially all conditions encountered in the post-bounce phase of core-collapse supernovae, it is a very good approximation to calculate the spin relaxation rates in the nondegenerate limit. We calculate spin relaxation rates based on chiral effective field theory interactions and find that they are typically a factor of two smaller than those obtained using the standard one-pion-exchange interaction alone.

  2. Quantitative phase imaging with partially coherent illumination.

    PubMed

    Nguyen, T H; Edwards, C; Goddard, L L; Popescu, G

    2014-10-01

    In this Letter, we formulate a mathematical model for predicting experimental outcomes in quantitative phase imaging (QPI) when the illumination field is partially spatially coherent. We derive formulae that apply to QPI and discuss expected results for two classes of QPI experiments: common path and traditional interferometry, under varying degrees of spatial coherence. In particular, our results describe the physical relationship between the spatial coherence of the illuminating field and the halo effect, which is well known in phase-contrast microscopy. We performed experiments relevant to this common situation and found that our theory is in excellent agreement with the data. With this new understanding of the effects of spatial coherence, our formulae offer an avenue for removing halo artifacts from phase images. PMID:25360915

  3. Partial pressure measurements with an active spectrometer

    SciTech Connect

    Brooks, N.H.; Jensen, T.H.; Colchin, R.J.; Maingi, R.; Wade, M.R.; Finkenthal, D.F.; Naumenko, N.; Tugarinov, S.

    1998-07-01

    Partial pressure neutral ga measurements have been made using a commercial Penning gauge in conjunction with an active spectrometer. In prior work utilizing bandpass filters and conventional spectrometers, trace concentrations of the hydrogen isotopes H, D, T and of the noble gases He, Ne and Ar were determined from characteristic spectral lines in the light emitted by the neutral species of these elements. For all the elements mentioned, the sensitivity was limited by spectral contamination from a pervasive background of molecular hydrogen radiation. The active spectrometer overcomes this limitations by means of a digital lock-in method and correlation with reference spectra. Preliminary measurements of an admixture containing a trace amount of neon in deuterium show better than a factor of 20 improvement in sensitivity over conventional techniques. This can be further improved by correlating the relative intensities of multiple lines to sets of reference spectra.

  4. Partial 1q Duplications and Associated Phenotype

    PubMed Central

    Morris, Marcos L.M.; Baroneza, José E.; Teixeira, Patricia; Medina, Cristina T.N.; Cordoba, Mara S.; Versiani, Beatriz R.; Roese, Liege L.; Freitas, Erika L.; Fonseca, Ana C.S.; dos Santos, Maria C.G.; Pic-Taylor, Aline; Rosenberg, Carla; Oliveira, Silviene F.; Ferrari, Iris; Mazzeu, Juliana F.

    2016-01-01

    Duplications of the long arm of chromosome 1 are rare. Distal duplications are the most common and have been reported as either pure trisomy or unbalanced translocations. The paucity of cases with pure distal 1q duplications has made it difficult to delineate a partial distal trisomy 1q syndrome. Here, we report 2 patients with overlapping 1q duplications detected by G-banding. Array CGH and FISH were performed to characterize the duplicated segments, exclude the involvement of other chromosomes and determine the orientation of the duplication. Patient 1 presents with a mild phenotype and carries a 22.5-Mb 1q41q43 duplication. Patient 2 presents with a pure 1q42.13qter inverted duplication of 21.5 Mb, one of the smallest distal 1q duplications ever described and one of the few cases characterized by array CGH, thus contributing to a better characterization of distal 1q duplication syndrome. PMID:27022331

  5. Partial 1q Duplications and Associated Phenotype.

    PubMed

    Morris, Marcos L M; Baroneza, José E; Teixeira, Patricia; Medina, Cristina T N; Cordoba, Mara S; Versiani, Beatriz R; Roese, Liege L; Freitas, Erika L; Fonseca, Ana C S; Dos Santos, Maria C G; Pic-Taylor, Aline; Rosenberg, Carla; Oliveira, Silviene F; Ferrari, Iris; Mazzeu, Juliana F

    2016-02-01

    Duplications of the long arm of chromosome 1 are rare. Distal duplications are the most common and have been reported as either pure trisomy or unbalanced translocations. The paucity of cases with pure distal 1q duplications has made it difficult to delineate a partial distal trisomy 1q syndrome. Here, we report 2 patients with overlapping 1q duplications detected by G-banding. Array CGH and FISH were performed to characterize the duplicated segments, exclude the involvement of other chromosomes and determine the orientation of the duplication. Patient 1 presents with a mild phenotype and carries a 22.5-Mb 1q41q43 duplication. Patient 2 presents with a pure 1q42.13qter inverted duplication of 21.5 Mb, one of the smallest distal 1q duplications ever described and one of the few cases characterized by array CGH, thus contributing to a better characterization of distal 1q duplication syndrome. PMID:27022331

  6. PARTIAL SLINGSHOT RECONNECTION BETWEEN TWO FILAMENTS

    SciTech Connect

    Jiang, Yunchun; Hong, Junchao; Yang, Jiayan; Bi, Yi; Zheng, Ruisheng; Yang, Bo; Li, Haidong; Yang, Dan

    2013-02-10

    We present a rare observation of an interaction between two filaments around AR 11358 and AR 11361 on 2011 December 3 that is strongly suggestive of the occurrence of slingshot reconnection. A small elbow-shaped active-region filament (F12) underwent a failed eruption that brought it into contact with a nearby larger, thicker filament (F34). Accompanied by the appearance of complicated internal structures below the erupting F12, its two legs separated away from each other and then connected into F34. This process led the filaments to change their connectivity to form two newly linked filaments, and one of them showed a clear inverse {gamma}-shape. However, the alteration in the filament connectivity was imperfect since F34 is discernible after the eruption. These observations can be interpreted as a partial slingshot reconnection between two filaments that had unequal axial magnetic flux.

  7. Partially stabilized zirconia piston bowl reliability

    SciTech Connect

    Hartsock, D.L.

    1987-10-01

    The Weibull based ''Simplified Structural Ceramic Design Technique'' was used to calculate the reliability of a partially stabilized zirconia (PSZ) piston bowl design. The details of the method and a set of sample calculations are presented. Test results of the piston bowl showed cracks in regions which had a high calculated probability of failure. In addition cracks developed in a region of high compressive/shear stress. Since Weibull reliability analysis only uses tensile stresses this area did not have a high calculated probability of failure. Several hypotheses are presented for the mode of failure in this region. The simplified technique was used to predict what the necessary material properties would have to be for successful PSZ insert of the design shown.

  8. Vehicle detection using partial least squares.

    PubMed

    Kembhavi, Aniruddha; Harwood, David; Davis, Larry S

    2011-06-01

    Detecting vehicles in aerial images has a wide range of applications, from urban planning to visual surveillance. We describe a vehicle detector that improves upon previous approaches by incorporating a very large and rich set of image descriptors. A new feature set called Color Probability Maps is used to capture the color statistics of vehicles and their surroundings, along with the Histograms of Oriented Gradients feature and a simple yet powerful image descriptor that captures the structural characteristics of objects named Pairs of Pixels. The combination of these features leads to an extremely high-dimensional feature set (approximately 70,000 elements). Partial Least Squares is first used to project the data onto a much lower dimensional sub-space. Then, a powerful feature selection analysis is employed to improve the performance while vastly reducing the number of features that must be calculated. We compare our system to previous approaches on two challenging data sets and show superior performance.

  9. Solving Partial Differential Equations on Overlapping Grids

    SciTech Connect

    Henshaw, W D

    2008-09-22

    We discuss the solution of partial differential equations (PDEs) on overlapping grids. This is a powerful technique for efficiently solving problems in complex, possibly moving, geometry. An overlapping grid consists of a set of structured grids that overlap and cover the computational domain. By allowing the grids to overlap, grids for complex geometries can be more easily constructed. The overlapping grid approach can also be used to remove coordinate singularities by, for example, covering a sphere with two or more patches. We describe the application of the overlapping grid approach to a variety of different problems. These include the solution of incompressible fluid flows with moving and deforming geometry, the solution of high-speed compressible reactive flow with rigid bodies using adaptive mesh refinement (AMR), and the solution of the time-domain Maxwell's equations of electromagnetism.

  10. Identification of partially occluded firearms through partonomy

    NASA Astrophysics Data System (ADS)

    Arslan, Abdullah N.; Hempelmann, Christian F.; Attardo, Salvatore; Blount, Grady P.; Sirakova, Nona N.; Sirakov, Nikolay M.

    2015-05-01

    In the present paper we study the problem of weapon identification and threat assessment from a single image with a partially occluded weapon. This problem poses very severe restrictions. To successfully identify a weapon from its parts we extend the first firearm ontology with the meronymic (partonomic) principle which lets us distinguish parts of a gun (e.g., lock, barrel, stock, scope). Adding classes of meronymic information provides meta-data (necessary for threat assessment) and allows for fast and accurate search. Searching for a weapon is treated conceptually as searching for the sum of its parts. An expanding active contour and morphological techniques are applied to partition weapons and extract boundaries, and a minimal inscribed complex polygon. Finite numerical sequences are generated, from the extracted geometric features, and are used to label partonomic nodes and perform quick and accurate search. The paper reports experimental results on weapons partitioning and search.

  11. Faithful teleportation with partially entangled states

    SciTech Connect

    Gour, Gilad

    2004-10-01

    We write explicitly a general protocol for faithful teleportation of a d-state particle (qudit) via a partially entangled pair of (pure) n-state particles. The classical communication cost (CCC) of the protocol is log{sub 2}(nd) bits, and it is implemented by a projective measurement performed by Alice, and a unitary operator performed by Bob (after receiving from Alice the measurement result). We prove the optimality of our protocol by a comparison with the concentrate and teleport strategy. We also show that if d>n/2, or if there is no residual entanglement left after the faithful teleportation, the CCC of any protocol is at least log{sub 2}(nd) bits. Furthermore, we find a lower bound on the CCC in the process transforming one bipartite state to another by means of local operation and classical communication.

  12. Partial versus complete autogynephilia and gender dysphoria.

    PubMed

    Blanchard, R

    1993-01-01

    Autogynephilia (sexual arousal in men produced by the thought or image of themselves as women) is often associated with gender dysphoria (the desire to belong to the opposite sex). Previous research has shown that autogynephiles who are principally aroused by images of themselves as nude women are more gender dysphoric than those principally aroused by images of themselves as partially or fully dressed women. This study tested the hypothesis that the feature of the nude self-image most responsible for its correlation with gender dysphoria is the imagined vulva. The subjects were 220 nonhomosexual male outpatients who reported sexual arousal while imagining themselves with one or more features of the female anatomy. Autogynephilia and gender dysphoria were assessed with questionnaires. The findings confirmed that men who are sexually aroused at the thought of having a vulva are more likely to want to be women.

  13. Turbo Equalization Using Partial Gaussian Approximation

    NASA Astrophysics Data System (ADS)

    Zhang, Chuanzong; Wang, Zhongyong; Manchon, Carles Navarro; Sun, Peng; Guo, Qinghua; Fleury, Bernard Henri

    2016-09-01

    This paper deals with turbo-equalization for coded data transmission over intersymbol interference (ISI) channels. We propose a message-passing algorithm that uses the expectation-propagation rule to convert messages passed from the demodulator-decoder to the equalizer and computes messages returned by the equalizer by using a partial Gaussian approximation (PGA). Results from Monte Carlo simulations show that this approach leads to a significant performance improvement compared to state-of-the-art turbo-equalizers and allows for trading performance with complexity. We exploit the specific structure of the ISI channel model to significantly reduce the complexity of the PGA compared to that considered in the initial paper proposing the method.

  14. Grain boundary wetness of partially molten dunite

    NASA Astrophysics Data System (ADS)

    Mu, Shangshang; Faul, Ulrich H.

    2016-05-01

    Samples of Fo90 olivine and basaltic melt were annealed at a range of temperatures and a pressure of 1 GPa in a piston cylinder apparatus from 1 to 336 h. Post-run samples have melt contents from 0.3 to 6.8 % and mean grain sizes from 4.3 to 84.5 μm. Grain boundary wetness, a measure of the intergranular melt distribution, was determined by analyzing scanning electron microscope images with sufficiently high resolution to detect thin layers wetting grain boundaries, as well as small triple junctions. The measurements show that grain boundary wetness increases with increasing melt content to values well above those predicted by the idealized isotropic equilibrium model for a finite dihedral angle. Additionally, the melt geometry changes with grain size, with grain boundary wetness increasing with increasing grain size at fixed melt content. Grain boundary wetness and dihedral angle of samples annealed at a range of temperatures, but constant melt content does not depend on temperature. These observations emphasize that the dihedral angle alone is not adequate to characterize the melt distribution in partially molten rocks, as the idealized isotropic model does not account for the influence of grain growth. Diffusion creep viscosities calculated from the measured wetness reflect the grain size and melt content dependence. Accordingly, experimentally measured viscosities at small grain sizes underestimate the effect of melt to weaken partially molten rocks for coarser grain sizes. The presence of melt in the mantle may therefore enhance diffusion creep relative to dislocation creep.

  15. Partial volume estimation using continuous representations

    NASA Astrophysics Data System (ADS)

    Siadat, Mohammad-Reza; Soltanian-Zadeh, Hamid

    2001-07-01

    This paper presents a new method for partial volume estimation using standard eigenimage method and B-splines. The proposed method is applied on the multi-parameter volumetric images such as MRI. The proposed approach uses the B-spline bases (kernels) to interpolate a continuous 2D surface or 3D density function for a sampled image dataset. It uses the Fourier domain to calculate the interpolation coefficients for each data point. Then, the above interpolation is incorporated into the standard eigenimage method. This incorporation provides a particular mask depending on the B-spline basis used. To estimate the partial volumes, this mask is convolved with the interpolation coefficients and then the eigenimage transformation is applied on the convolution result. To evaluate the method, images scanned from a 3D simulation model are used. The simulation provides images similar to CSF, white matter, and gray matter of the human brain in T1-, T2-, and PD-weighted MRI. The performance of the new method is also compared to that of the polynomial estimators.1 The results show that the new estimators have standard deviations less than that of the eigenimage method (up to 25%) and larger than those of the polynomial estimators (up to 45%). The new estimators have superior capabilities compared to that of the polynomial ones in that they provide an arbitrary degree of continuity at the boundaries of pixels/voxels. As a result, employing the new method, a continuous, smooth, and very accurate contour/surface of the desired object can be generated. The new B-spline estimators are faster than the polynomial estimators but they are slower than the standard eigenimage method.

  16. Laterality Defects in the National Birth Defects Prevention Study (1998–2007): Birth Prevalence and Descriptive Epidemiology

    PubMed Central

    Lin, Angela E.; Krikov, Sergey; Riehle-Colarusso, Tiffany; Frías, Jaime L.; Belmont, John; Anderka, Marlene; Geva, Tal; Getz, Kelly D.; Botto, Lorenzo D.

    2015-01-01

    Little is known epidemiologically about laterality defects. Using data from the National Birth Defects Prevention Study (NBDPS), a large multi-site case-control study of birth defects, we analyzed prevalence and selected characteristics in children born with laterality defects born from 1998 to 2007. We identified 517 nonsyndromic cases (378 heterotaxy, 73.1%; 139 situs inversus totalis [SIT], 26.9%) resulting in an estimated birth prevalence of 1.1 per 10,000 live births (95% confidence interval 1.0–1.2). Prevalence did not differ significantly across sites, over time, or by inclusion of pregnancy termination. Laterality defects were more common among preterm cases compared to term cases, and in children born to mothers who were non-white or younger than 20 years compared to white mothers or those age 25–29 years. The distribution of associated cardiac and extracardiac defects, excluding the expected heterotaxy anomalies, varied by type of laterality defect. Cases with heterotaxy were significantly more likely than those with SIT to have double outlet right ventricle, atrioventricular canal defects, pulmonary stenosis, non-tetralogy of Fallot pulmonary atresia with ventricular septal defect, totally and partially anomalous pulmonary venous return; also more likely to have orofacial clefts, esophageal atresia, bowel atresias, and omphalocele, though not reaching statistical significance. Relatively more common among cases with SIT were Dandy-Walker malformation, anotia/microtia, and limb deficiency. The similarity in the demographic characteristics of heterotaxy and SIT supports the hypothesis that they are part of a continuum of abnormal left-right axis patterning. These findings on laterality defects may help guide clinical care, future research, and prevention strategies. PMID:25099286

  17. Laterality defects in the national birth defects prevention study (1998-2007): birth prevalence and descriptive epidemiology.

    PubMed

    Lin, Angela E; Krikov, Sergey; Riehle-Colarusso, Tiffany; Frías, Jaime L; Belmont, John; Anderka, Marlene; Geva, Tal; Getz, Kelly D; Botto, Lorenzo D

    2014-10-01

    Little is known epidemiologically about laterality defects. Using data from the National Birth Defects Prevention Study (NBDPS), a large multi-site case-control study of birth defects, we analyzed prevalence and selected characteristics in children born with laterality defects born from 1998 to 2007. We identified 517 nonsyndromic cases (378 heterotaxy, 73.1%; 139 situs inversus totalis [SIT], 26.9%) resulting in an estimated birth prevalence of 1.1 per 10,000 live births (95% confidence interval 1.0–1.2). Prevalence did not differ significantly across sites, over time, or by inclusion of pregnancy termination. Laterality defects were more common among preterm cases compared to term cases, and in children born to mothers who were non-white or younger than 20 years compared to white mothers or those age 25–29 years. The distribution of associated cardiac and extra-cardiac defects, excluding the expected heterotaxy anomalies, varied by type of laterality defect. Cases with heterotaxy were significantly more likely than those with SIT to have double outlet right ventricle, atrioventricular canal defects, pulmonary stenosis, non-tetralogy of Fallot pulmonary atresia with ventricular septal defect, totally and partially anomalous pulmonary venous return; also more likely to have orofacial clefts, esophageal atresia, bowel atresias, and omphalocele, though not reaching statistical significance. Relatively more common among cases with SIT were Dandy- Walker malformation, anotia/microtia, and limb deficiency. The similarity in the demographic characteristics of heterotaxy and SIT supports the hypothesis that they are part of a continuum of abnormal left-right axis patterning. These findings on laterality defects may help guide clinical care, future research, and prevention strategies.

  18. Saline intrusion in partially mixed estuaries

    NASA Astrophysics Data System (ADS)

    Prandle, D.

    2004-03-01

    Restricting interest to partially mixed estuaries, earlier studies of tidally averaged linearised theories relating to the vertical structure of salinity and velocities (accompanying saline intrusion) are extended to take account of tidal straining and associated convective overturning. The applicability of these theories is evaluated by reference to a 'single-point' numerical model in which the time-varying cycle of depth-averaged tidal current amplitude, Û, and a (temporally and vertically) constant saline gradient, S x, are specified. This model highlights the importance of convective overturning in counteracting unstable density structures introduced by tidal straining. By omitting overturning in the model, results agree closely with linearised theoretical derivations. However, incorporating overturning substantially increases tidally averaged surface-to-bed differences for both residual currents, δ u, and salinity, δ s. The vertical structure of tidal currents is a maximum, and hence the effect of tidal straining, in shallow macro-tidal estuaries. The propagation of tidal elevations and currents remains insensitive to saline intrusion in partially mixed estuaries. The applicability of the model was evaluated by simulation of recent measurements by Rippeth et al. (J. Phys. Oceanogr. 31 (2001) 2458). To explore the generality of estuarine responses, the model was run for a wide range of values of saline intrusion lengths, L, and water depths, D. Additional sensitivity analyses were made for changes in Û and bed stress coefficient, k. Response frameworks are shown for: δ u, δ s, potential energy anomaly φ, work done by bed friction and internal shear, rates and efficiency of saline mixing and ratios of relative mixing by diffusion to overturning. By equating the rate of mixing associated with vertical diffusion with river flow, Q, an expression for saline intrusion length L∝D 2/k ÛU o ( Uo river flow velocity) was derived. This formulation agrees with

  19. Compatible Spatial Discretizations for Partial Differential Equations

    SciTech Connect

    Arnold, Douglas, N, ed.

    2004-11-25

    From May 11--15, 2004, the Institute for Mathematics and its Applications held a hot topics workshop on Compatible Spatial Discretizations for Partial Differential Equations. The numerical solution of partial differential equations (PDE) is a fundamental task in science and engineering. The goal of the workshop was to bring together a spectrum of scientists at the forefront of the research in the numerical solution of PDEs to discuss compatible spatial discretizations. We define compatible spatial discretizations as those that inherit or mimic fundamental properties of the PDE such as topology, conservation, symmetries, and positivity structures and maximum principles. A wide variety of discretization methods applied across a wide range of scientific and engineering applications have been designed to or found to inherit or mimic intrinsic spatial structure and reproduce fundamental properties of the solution of the continuous PDE model at the finite dimensional level. A profusion of such methods and concepts relevant to understanding them have been developed and explored: mixed finite element methods, mimetic finite differences, support operator methods, control volume methods, discrete differential forms, Whitney forms, conservative differencing, discrete Hodge operators, discrete Helmholtz decomposition, finite integration techniques, staggered grid and dual grid methods, etc. This workshop seeks to foster communication among the diverse groups of researchers designing, applying, and studying such methods as well as researchers involved in practical solution of large scale problems that may benefit from advancements in such discretizations; to help elucidate the relations between the different methods and concepts; and to generally advance our understanding in the area of compatible spatial discretization methods for PDE. Particular points of emphasis included: + Identification of intrinsic properties of PDE models that are critical for the fidelity of numerical

  20. Multimedia document retrieval system using partially ordered/partially reliable transport service

    NASA Astrophysics Data System (ADS)

    Conrad, Phillip T.; Golden, Edward; Amer, Paul D.; Marasli, Rahmi

    1996-03-01

    We investigate the benefits of using a partially-ordered/partially-reliable (PO/PR) transport service for multimedia document retrieval over the Internet by implementing a prototype system. We introduce PMSL, a document specification language combining aspects of Little and Ghafoor's OCPN with features for graceful degradation. We then show that for retrieval of PMSL documents, our PO/PR transport protocol (POCv2) provides several benefits over traditional protocols such as TCP or UDP. First, POCv2 provides mechanisms to achieve the reliability and order requirements of individual multimedia objects as specified by a document author. Second, when network conditions are poor (e.g., high loss rates), POCv2 provides for graceful degradation. Finally, POCv2 simplifies application development by providing appropriate mechanisms for synchronization.

  1. New approach to breast cancer CAD using partial least squares and kernel-partial least squares

    NASA Astrophysics Data System (ADS)

    Land, Walker H., Jr.; Heine, John; Embrechts, Mark; Smith, Tom; Choma, Robert; Wong, Lut

    2005-04-01

    Breast cancer is second only to lung cancer as a tumor-related cause of death in women. Currently, the method of choice for the early detection of breast cancer is mammography. While sensitive to the detection of breast cancer, its positive predictive value (PPV) is low, resulting in biopsies that are only 15-34% likely to reveal malignancy. This paper explores the use of two novel approaches called Partial Least Squares (PLS) and Kernel-PLS (K-PLS) to the diagnosis of breast cancer. The approach is based on optimization for the partial least squares (PLS) algorithm for linear regression and the K-PLS algorithm for non-linear regression. Preliminary results show that both the PLS and K-PLS paradigms achieved comparable results with three separate support vector learning machines (SVLMs), where these SVLMs were known to have been trained to a global minimum. That is, the average performance of the three separate SVLMs were Az = 0.9167927, with an average partial Az (Az90) = 0.5684283. These results compare favorably with the K-PLS paradigm, which obtained an Az = 0.907 and partial Az = 0.6123. The PLS paradigm provided comparable results. Secondly, both the K-PLS and PLS paradigms out performed the ANN in that the Az index improved by about 14% (Az ~ 0.907 compared to the ANN Az of ~ 0.8). The "Press R squared" value for the PLS and K-PLS machine learning algorithms were 0.89 and 0.9, respectively, which is in good agreement with the other MOP values.

  2. Parameter Estimation of Partial Differential Equation Models.

    PubMed

    Xun, Xiaolei; Cao, Jiguo; Mallick, Bani; Carroll, Raymond J; Maity, Arnab

    2013-01-01

    Partial differential equation (PDE) models are commonly used to model complex dynamic systems in applied sciences such as biology and finance. The forms of these PDE models are usually proposed by experts based on their prior knowledge and understanding of the dynamic system. Parameters in PDE models often have interesting scientific interpretations, but their values are often unknown, and need to be estimated from the measurements of the dynamic system in the present of measurement errors. Most PDEs used in practice have no analytic solutions, and can only be solved with numerical methods. Currently, methods for estimating PDE parameters require repeatedly solving PDEs numerically under thousands of candidate parameter values, and thus the computational load is high. In this article, we propose two methods to estimate parameters in PDE models: a parameter cascading method and a Bayesian approach. In both methods, the underlying dynamic process modeled with the PDE model is represented via basis function expansion. For the parameter cascading method, we develop two nested levels of optimization to estimate the PDE parameters. For the Bayesian method, we develop a joint model for data and the PDE, and develop a novel hierarchical model allowing us to employ Markov chain Monte Carlo (MCMC) techniques to make posterior inference. Simulation studies show that the Bayesian method and parameter cascading method are comparable, and both outperform other available methods in terms of estimation accuracy. The two methods are demonstrated by estimating parameters in a PDE model from LIDAR data. PMID:24363476

  3. Neurotrophic factor - Characterization and partial purification

    NASA Technical Reports Server (NTRS)

    Popiela, H.; Ellis, S.

    1981-01-01

    Recent evidence suggests that neurotrophic activity is required for the normal proliferation and development of muscle cells. The present paper reports a study of the purification and characterization of a neurotrophic factor (NTF) from adult chicken ischiatic-peroneal nerves using two independent quantitative in vitro assay systems. The assays were performed by the measurement of the incorporation of tritiated thymidine or the sizes of single-cell clones by chick muscle cells grown in culture. The greatest amount of neutrotrophic activity is found to be extracted at a pH of 8; aqueous suspensions of the activity are stable to long-term storage at room temperature. The specific activity of the substance is doubled upon precipitation with ammonium sulfate or after gel filtration, and increase 4 to 5 fold after salt gradient elution from DEAE cellulose columns. The active fraction obtained after gel filtration and rechromatography on DEAE cellulose exhibits a 7 to 10-fold increase in specific activity. Electrophoresis of the most highly purified material yields a greatly concentrated band at around 80,000 daltons. Although NTF is purified almost 10-fold as indicated by the increase in specific activity, the maximum activity of the partially purified material is greatly reduced, possibly due to a requirement for a cofactor for the expression of maximum activity.

  4. Partial splenic artery embolization in cirrhotic patients

    PubMed Central

    Hadduck, Tyson A; McWilliams, Justin P

    2014-01-01

    Splenomegaly is a common sequela of cirrhosis, and is frequently associated with decreased hematologic indices including thrombocytopenia and leukopenia. Partial splenic artery embolization (PSE) has been demonstrated to effectively increase hematologic indices in cirrhotic patients with splenomegaly. This is particularly valuable amongst those cirrhotic patients who are not viable candidates for splenectomy. Although PSE was originally developed decades ago, it has recently received increased attention. Presently, PSE is being utilized to address a number of clinical concerns in the setting of cirrhosis, including: decreased hematologic indices, portal hypertension and its associated sequela, and splenic artery steal syndrome. Following PSE patients demonstrate significant increases in platelets and leukocytes. Though progressive decline of hematologic indices occur following PSE, they remain improved as compared to pre-procedural values over long-term follow-up. PSE, however, is not without risk and complications of the procedure may occur. The most common complication of PSE is post-embolization syndrome, which involves a constellation of symptoms including fever, pain, and nausea/vomiting. The rate of complications has been shown to increase as the percent of total splenic volume embolized increases. The purpose of this review is to explore the current literature in regards to PSE in cirrhotic patients and to highlight their techniques, and statistically summarize their results and associated complications. PMID:24876920

  5. Precise Point Positioning with Partial Ambiguity Fixing

    PubMed Central

    Li, Pan; Zhang, Xiaohong

    2015-01-01

    Reliable and rapid ambiguity resolution (AR) is the key to fast precise point positioning (PPP). We propose a modified partial ambiguity resolution (PAR) method, in which an elevation and standard deviation criterion are first used to remove the low-precision ambiguity estimates for AR. Subsequently the success rate and ratio-test are simultaneously used in an iterative process to increase the possibility of finding a subset of decorrelated ambiguities which can be fixed with high confidence. One can apply the proposed PAR method to try to achieve an ambiguity-fixed solution when full ambiguity resolution (FAR) fails. We validate this method using data from 450 stations during DOY 021 to 027, 2012. Results demonstrate the proposed PAR method can significantly shorten the time to first fix (TTFF) and increase the fixing rate. Compared with FAR, the average TTFF for PAR is reduced by 14.9% for static PPP and 15.1% for kinematic PPP. Besides, using the PAR method, the average fixing rate can be increased from 83.5% to 98.2% for static PPP, from 80.1% to 95.2% for kinematic PPP respectively. Kinematic PPP accuracy with PAR can also be significantly improved, compared to that with FAR, due to a higher fixing rate. PMID:26067196

  6. Design of channeled partial Mueller matrix polarimeters.

    PubMed

    Alenin, Andrey S; Scott Tyo, J

    2016-06-01

    In this paper, we introduce a novel class of systems called channeled partial Mueller matrix polarimeters (c-pMMPs). Their analysis benefits greatly by drawing from the concepts of generalized construction of channeled polarimeters as described by the modulation matrix. The modulation matrix resembles that of the data reduction method of a conventional polarimeter, but instead of using Mueller vectors as the bases, attention is focused on the Fourier properties of the measurement conditions. By leveraging the understanding of the measurement's structure, its decomposition can be manipulated to reveal noise resilience and information about the polarimeter's ability to measure the aspect of polarization that are important for any given task. We demonstrate the theory with a numerical optimization that designs c-pMMPs for the task of monitoring the damage state of a material as presented earlier by Hoover and Tyo [Appl. Opt.46, 8364 (2007)APOPAI0003-693510.1364/AO.46.008364]. We select several example systems that produce a fewer-than-full-system number of channels yet retain the ability to discriminate objects of interest. Their respective trade-offs are discussed. PMID:27409432

  7. The new BNL partial wave analysis programs

    SciTech Connect

    Cummings, J.P.; Weygand, D.P.

    1997-07-29

    Experiment E852 at Brookhaven National Laboratory is a meson spectroscopy experiment which took data at the Multi-Particle Spectrometer facility of the Alternating Gradient Syncrotron. Upgrades to the spectrometer`s data acquisition and trigger electronics allowed over 900 million data events, of numerous topologies, to be recorded to tape in 1995 running alone. One of the primary goals of E852 is identification of states beyond the quark model, i.e., states with gluonic degrees of freedom. Identification of such states involves the measurement of a systems spin-parity. Such a measurement is usually done using Partial Wave Analysis. Programs to perform such analyses exist, in fact, one was written at BNL and used in previous experiments by some of this group. This program, however, was optimized for a particular final state, and modification to allow analysis of the broad range of final states in E852 would have been difficult. The authors therefore decided to write a new program, with an eye towards generality that would allow analysis of a large class of reactions.

  8. Clinical application of partial splenic embolization.

    PubMed

    Guan, Yong-Song; Hu, Ying

    2014-01-01

    Partial splenic embolization (PSE) is one of the intra-arterial therapeutic approaches of diseases. With the development of interventional radiology, the applications of PSE in clinical practice are greatly extended, while various materials are developed for embolization use. Common indications of PSE include hypersplenism with portal hypertension, hereditary spherocytosis, thalassemia, autoimmune hemolytic anemia, splenic trauma, idiopathic thrombocytopenic purpura, splenic hemangioma, and liver cancer. It is also performed to exclude splenic artery aneurysms from the parent vessel lumen and prevent aneurysm rupture, to treat splenic artery steal syndrome and improve liver perfusion in liver transplant recipients, and to administer targeted treatment to areas of neoplastic disease in the splenic parenchyma. Indicators of the therapeutic effect evaluation of PSE comprise blood routine test, changes in hemodynamics and in splenic volume. Major complications of PSE include the pulmonary complications, severe infection, damages of renal and liver function, and portal vein thrombosis. The limitations of PSE exist mainly in the difficulties in selecting the arteries to embolize and in evaluating the embolized volume.

  9. Partial oxidation of heavy refinery fractions

    SciTech Connect

    Dille, R.M.; Rhodes, H.A.; Wallon, S.B.

    1984-07-31

    This is a partial oxidation process in which heavy hydrocarbonaceous fractions from a petroleum refinery and light liquid paraffinic hydrocarbon extractants are used in the production of synthesis gas, reducing gas, or fuel gas i.e., gaseous mixtures comprising H/sub 2/ and CO. In the process, substantially all of the particulate carbon and soot that are simultaneously produced are recovered and recycled to the reaction zone. A dispersion of carbon-soot-light paraffinic hydrocarbon extractant from the decanting zone is combined with a heavy refinery fraction in admixture with a liquid aromatic-rich hydrocarbon to produce a pumpable single liquid phase mixture which is introduced into a fractionation zone where the following streams are separated from each other: (a) a stream of light paraffinic hydrocarbon extractant which is recycled to the decanting zone, (b) a stream comprising at least a portion of the aromatic-rich hydrocarbon which is recycled for mixing with the heavy refinery fraction, and (c) a stream of pumpable dispersion of carbon-soot heavy refinery fraction and any remaining aromatic-rich hydrocarbon which may be used as fuel in the system or exported. Troublesome asphaltene precipitation that causes operational problems and increased viscosity is avoided by the subject process. Comparatively low cost heavy refinery fractions which ordinarily are difficult to handle may be now used along with light liquid paraffinic hydrocarbon extractants.

  10. Partially ordered state of ice XV

    PubMed Central

    Komatsu, K.; Noritake, F.; Machida, S.; Sano-Furukawa, A.; Hattori, T.; Yamane, R.; Kagi, H.

    2016-01-01

    Most ice polymorphs have order–disorder “pairs” in terms of hydrogen positions, which contributes to the rich variety of ice polymorphs; in fact, three recently discovered polymorphs— ices XIII, XIV, and XV—are ordered counter forms to already identified disordered phases. Despite the considerable effort to understand order–disorder transition in ice crystals, there is an inconsistency among the various experiments and calculations for ice XV, the ordered counter form of ice VI, i.e., neutron diffraction observations suggest antiferroelectrically ordered structures, which disagree with dielectric measurement and theoretical studies, implying ferroelectrically ordered structures. Here we investigate in-situ neutron diffraction measurements and density functional theory calculations to revisit the structure and stability of ice XV. We find that none of the completely ordered configurations are particular favored; instead, partially ordered states are established as a mixture of ordered domains in disordered ice VI. This scenario in which several kinds of ordered configuration coexist dispels the contradictions in previous studies. It means that the order–disorder pairs in ice polymorphs are not one-to-one correspondent pairs but rather have one-to-n correspondence, where there are n possible configurations at finite temperature. PMID:27375120

  11. Partially ordered state of ice XV

    NASA Astrophysics Data System (ADS)

    Komatsu, K.; Noritake, F.; Machida, S.; Sano-Furukawa, A.; Hattori, T.; Yamane, R.; Kagi, H.

    2016-07-01

    Most ice polymorphs have order–disorder “pairs” in terms of hydrogen positions, which contributes to the rich variety of ice polymorphs; in fact, three recently discovered polymorphs— ices XIII, XIV, and XV—are ordered counter forms to already identified disordered phases. Despite the considerable effort to understand order–disorder transition in ice crystals, there is an inconsistency among the various experiments and calculations for ice XV, the ordered counter form of ice VI, i.e., neutron diffraction observations suggest antiferroelectrically ordered structures, which disagree with dielectric measurement and theoretical studies, implying ferroelectrically ordered structures. Here we investigate in-situ neutron diffraction measurements and density functional theory calculations to revisit the structure and stability of ice XV. We find that none of the completely ordered configurations are particular favored; instead, partially ordered states are established as a mixture of ordered domains in disordered ice VI. This scenario in which several kinds of ordered configuration coexist dispels the contradictions in previous studies. It means that the order–disorder pairs in ice polymorphs are not one-to-one correspondent pairs but rather have one-to-n correspondence, where there are n possible configurations at finite temperature.

  12. Partial squeeze film levitation modulates fingertip friction.

    PubMed

    Wiertlewski, Michaël; Fenton Friesen, Rebecca; Colgate, J Edward

    2016-08-16

    When touched, a glass plate excited with ultrasonic transverse waves feels notably more slippery than it does at rest. To study this phenomenon, we use frustrated total internal reflection to image the asperities of the skin that are in intimate contact with a glass plate. We observed that the load at the interface is shared between the elastic compression of the asperities of the skin and a squeeze film of air. Stroboscopic investigation reveals that the time evolution of the interfacial gap is partially out of phase with the plate vibration. Taken together, these results suggest that the skin bounces against the vibrating plate but that the bounces are cushioned by a squeeze film of air that does not have time to escape the interfacial separation. This behavior results in dynamic levitation, in which the average number of asperities in intimate contact is reduced, thereby reducing friction. This improved understanding of the physics of friction reduction provides key guidelines for designing interfaces that can dynamically modulate friction with soft materials and biological tissues, such as human fingertips. PMID:27482117

  13. Partial Wave Analysis of Coupled Photonic Structures

    NASA Technical Reports Server (NTRS)

    Fuller, Kirk A.; Smith, David D.; Curreri, Peter A. (Technical Monitor)

    2002-01-01

    The very high quality factors sustained by microcavity optical resonators are relevant to applications in wavelength filtering, routing, switching, modulation, and multiplexing/demultiplexing. Increases in the density of photonic elements require that attention be paid to how electromagnetic (EM) coupling modifies their optical properties. This is especially true when cavity resonances are involved, in which case, their characteristics may be fundamentally altered. Understanding the optical properties of microcavities that are near or in contact with photonic elements---such as other microcavities, nanostructures, couplers, and substrates---can be expected to advance our understanding of the roles that these structures may play in VLSI photonics, biosensors and similar device technologies. Wc present results from recent theoretical studies of the effects of inter- and intracavity coupling on optical resonances in compound spherical particles. Concentrically stratified spheres and bispheres constituted from homogeneous and stratified spheres are subjects of this investigation. A new formulation is introduced for the absorption of light in an arbitrary layer of a multilayered sphere, which is based on multiple reflections of the spherical partial waves of the Lorenz-Mie solution for scattering by a sphere. Absorption efficiencies, which can be used to profile cavity resonances and to infer fluorescence yields or the onset of nonlinear optical processes in the microcavities, are presented. Splitting of resonances in these multisphere systems is paid particular attention, and consequences for photonic device development and possible performance enhancements through carefully designed architectures that exploit EM coupling are considered.

  14. Wall pressure fluctuations in rectangular partial enclosures

    NASA Astrophysics Data System (ADS)

    Pagliaroli, T.; Camussi, R.

    2015-04-01

    Wall pressure fluctuations generated within rectangular partial enclosures (RPEs) have been studied experimentally for a broad range of geometrical parameters. The geometry represents a simplified version of a new generation trapped vortex combustor and consisted of a rectangular cavity connected to a neck of smaller size. Wall pressure fluctuations have been measured through wall mounted microphones providing single and multi-variate pressure statistics both in the physical space and in the Fourier domain. In order to interpret the pressure signals, aerodynamic and acoustic investigations have been carried out as well for several cavity-neck ratios. The analysis of the acoustic response of the cavity has been conducted both numerically and experimentally and a simple theoretical model has been proposed to predict the frequency of the acoustic resonances. The aerodynamic study has been carried out through PIV measurements that provided characterization in terms of the geometrical parameters of both the large-scale vortex generated within the cavity and the recirculation zone formed upstream of the neck. The use of the POD decomposition permitted us to correlate the dynamics of the recirculation with the observed pressure statistics. The aerodynamic and acoustic investigations allowed us to interpret exhaustively the wall pressure cross-statistics and to separate contributions induced by hydrodynamic and purely acoustic pressure fluctuations.

  15. Using partial sensor information to orient parts

    SciTech Connect

    Akella, S.; Mason, M.T.

    1999-10-01

    Parts orienting, the process of bringing parts in initially unknown orientations to a goal orientation, is an important aspect of automated assembly. The most common industrial orienting systems are vibratory bowl feeders, which use the shape and mass properties of parts to orient them. Bowl feeders rely on a sequence of mechanical operations and typically do not use sensors. In this paper, the authors describe the use of partial information sensors along with a sequence of pushing operations to eliminate uncertainty in the orientation of parts. The authors characterize the shorter execution lengths of sensor-based plans and show that sensor-based plans are more powerful than sensorless plans in that they can bring a larger class of parts to distinct orientations. The authors characterize the relation among part shape, orientability; and recognizability to identify conditions under which a single plan can orient and recognize multiple part shapes. Although part shape determines the results of the actions and the sensed information, the authors establish that differences in part shape do not always lead to differences in part behavior. The authors show that for any convex polygon, there exists an infinite set of nonsimilar convex polygons that behave identically under linear normal pushes. Furthermore, there exists a infinite set of nonsimilar convex polygons whose behavior cannot be distinguished even with diameter sensing after each push. They authors have implemented several planners and demonstrated generated plans in experiments.

  16. Extended abstract: Partial row projection methods

    SciTech Connect

    Bramley, R.; Lee, Y.

    1996-12-31

    Accelerated row projection (RP) algorithms for solving linear systems Ax = b are a class of iterative methods which in theory converge for any nonsingular matrix. RP methods are by definition ones that require finding the orthogonal projection of vectors onto the null space of block rows of the matrix. The Kaczmarz form, considered here because it has a better spectrum for iterative methods, has an iteration matrix that is the product of such projectors. Because straightforward Kaczmarz method converges slowly for practical problems, typically an outer CG acceleration is applied. Definiteness, symmetry, or localization of the eigenvalues, of the coefficient matrix is not required. In spite of this robustness, work has generally been limited to structured systems such as block tridiagonal matrices because unlike many iterative solvers, RP methods cannot be implemented by simply supplying a matrix-vector multiplication routine. Finding the orthogonal projection of vectors onto the null space of block rows of the matrix in practice requires accessing the actual entries in the matrix. This report introduces a new partial RP algorithm which retains advantages of the RP methods.

  17. Partial solvation parameters and mixture thermodynamics.

    PubMed

    Panayiotou, Costas

    2012-06-21

    The recently introduced partial solvation parameters (PSPs) are molecular descriptors that combine elements from quantum mechanics with the QSPR/LSER/solvatochromic and solubility parameter approaches. Basic regularities and universalities exhibited by PSPs are examined in this work and the concepts of homosolvation, heterosolvation and solvation energy density are quantified. A simple consistent thermodynamic framework is developed, through which the validity of the PSP approach is tested. The predictions are compared with experimental phase equilibrium data that span the full composition range from the pure fluid state to infinite dilution. They include vapor-liquid equilibria of fluids interacting with strong specific forces, dissolution of solids/liquids in various solvents and probe/oligomer or probe/polymer interactions as typically determined by inverse gas-chromatography. These applications show the potential of the PSP approach not only to reasonably predict a variety of properties of classes of complex systems but, also, to shed light to challenging aspects of intermolecular interactions. The perspectives of this unified approach to solution thermodynamics are discussed. PMID:22642662

  18. Partial volume simulation in software breast phantoms

    NASA Astrophysics Data System (ADS)

    Chen, Feiyu; Pokrajac, David; Shi, Xiquan; Liu, Fengshan; Maidment, Andrew D. A.; Bakic, Predrag R.

    2012-03-01

    A modification to our previous simulation of breast anatomy is proposed, in order to improve the quality of simulated projections generated using software breast phantoms. Anthropomorphic software breast phantoms have been used for quantitative validation of breast imaging systems. Previously, we developed a novel algorithm for breast anatomy simulation, which did not account for the partial volume (PV) of various tissues in a voxel; instead, each phantom voxel was assumed to contain single tissue type. As a result, phantom projection images displayed notable artifacts near the borders between regions of different materials, particularly at the skin-air boundary. These artifacts diminished the realism of phantom images. One solution is to simulate smaller voxels. Reducing voxel size, however, extends the phantom generation time and increases memory requirements. We achieved an improvement in image quality without reducing voxel size by the simulation of PV in voxels containing more than one simulated tissue type. The linear x-ray attenuation coefficient of each voxel is calculated by combining attenuation coefficients proportional to the voxel subvolumes occupied by the various tissues. A local planar approximation of the boundary surface is employed, and the skin volume in each voxel is computed by decomposition into simple geometric shapes. An efficient encoding scheme is proposed for the type and proportion of simulated tissues in each voxel. We illustrate the proposed methodology on phantom slices and simulated mammographic projections. Our results show that the PV simulation has improved image quality by reducing quantization artifacts.

  19. Modification of integrated partial payload lifting assembly

    NASA Technical Reports Server (NTRS)

    Groah, Melodie; Haddock, Michael; Woodworth, Warren

    1986-01-01

    The Integrated Partial Payload Lifting Assembly (IPPLA) is currently used to transport and load experimental payloads into the cargo bay of the Space Shuttle. It is unable to carry the astronaut/passenger tunnel without a structural modification. The purpose of this design is to create a removalbe modification that will allow the IPPLA to lift and carry the passenger tunnel. Modifications evaluated were full-length insert beams which would extend through the existing strongback arms. These beam proposals were eliminated because of high cost and weight. Other proposals evaluated were attachments of cantilever beams to the existing strongback areas. The cantilever proposals reduced cost and weight compared to the full-length modifications. A third method evaluated was to simply make modifications to one side of the IPPLA therefore reducing the materials of the cantilever proposals by 40 percent. The design of the modification selected was completed with two channel beams jointly welded to a centered steel plate. The extension arm modification is inserted into the existing strongback channel beams and bolted into place. Two extension arms are added to one side of the IPPLA to provide the extra length needed to accommodate the passenger tunnel. The center counterbalance will then be offset about 20 inches to center gravity and therefore maintain horizontal status. The extension arm modification was selected because of minimum cost, low weight, and minimal installation time.

  20. Catalytic partial oxidation of pyrolysis oils

    NASA Astrophysics Data System (ADS)

    Rennard, David Carl

    2009-12-01

    This thesis explores the catalytic partial oxidation (CPO) of pyrolysis oils to syngas and chemicals. First, an exploration of model compounds and their chemistries under CPO conditions is considered. Then CPO experiments of raw pyrolysis oils are detailed. Finally, plans for future development in this field are discussed. In Chapter 2, organic acids such as propionic acid and lactic acid are oxidized to syngas over Pt catalysts. Equilibrium production of syngas can be achieved over Rh-Ce catalysts; alternatively mechanistic evidence is derived using Pt catalysts in a fuel rich mixture. These experiments show that organic acids, present in pyrolysis oils up to 25%, can undergo CPO to syngas or for the production of chemicals. As the fossil fuels industry also provides organic chemicals such as monomers for plastics, the possibility of deriving such species from pyrolysis oils allows for a greater application of the CPO of biomass. However, chemical production is highly dependent on the originating molecular species. As bio oil comprises up to 400 chemicals, it is essential to understand how difficult it would be to develop a pure product stream. Chapter 3 continues the experimentation from Chapter 2, exploring the CPO of another organic functionality: the ester group. These experiments demonstrate that equilibrium syngas production is possible for esters as well as acids in autothermal operation with contact times as low as tau = 10 ms over Rh-based catalysts. Conversion for these experiments and those with organic acids is >98%, demonstrating the high reactivity of oxygenated compounds on noble metal catalysts. Under CPO conditions, esters decompose in a predictable manner: over Pt and with high fuel to oxygen, non-equilibrium products show a similarity to those from related acids. A mechanism is proposed in which ethyl esters thermally decompose to ethylene and an acid, which decarbonylates homogeneously, driven by heat produced at the catalyst surface. Chapter 4

  1. Characterization of partially coherent ultrashort XUV pulses

    NASA Astrophysics Data System (ADS)

    Bourassin-Bouchet, Charles; Couprie, Marie-Emmanuelle

    2015-05-01

    Modern ultrafast metrology relies on the postulate that the pulse to be measured is fully coherent, i.e. that it can be completely described by its spectrum and spectral phase. However, synthesizing fully coherent pulses is not always possible in practice, especially in the domain of emerging ultrashort X-ray sources where temporal metrology is strongly needed. As an example, the lack of longitudinal coherence, that is shot-to-shot fluctuations, of Free-Electron Lasers (FEL) has prevented so far their full amplitude and phase temporal characterization. To sort out this issue, we have adapted Frequency-Resolved Optical Gating (FROG), the first and one of the most widespread techniques for pulse characterization, to enable the measurement of partially coherent XUV pulses even down to the attosecond timescale. Especially, this technique allows one to overcome the sources of decoherence that normally prevent a pulse measurement, such as the spectrometer resolution or the presence of XUV/laser arrival time jitter.

  2. The Complexity of Partial-Observation Parity Games

    NASA Astrophysics Data System (ADS)

    Chatterjee, Krishnendu; Doyen, Laurent

    We consider two-player zero-sum games on graphs. On the basis of the information available to the players these games can be classified as follows: (a) partial-observation (both players have partial view of the game); (b) one-sided partial-observation (one player has partial-observation and the other player has complete-observation); and (c) complete-observation (both players have complete view of the game). We survey the complexity results for the problem of deciding the winner in various classes of partial-observation games with ω-regular winning conditions specified as parity objectives. We present a reduction from the class of parity objectives that depend on sequence of states of the game to the sub-class of parity objectives that only depend on the sequence of observations. We also establish that partial-observation acyclic games are PSPACE-complete.

  3. Hippocampal lesions do not alter the partial punishment effect.

    PubMed

    Brookes, S; Rawlins, J N; Gray, J A

    1983-01-01

    Rats were trained to run in an alley for food reward. In a 'partial punishment' condition the animals also received occasional footshock in the goalbox; controls received only food reward during training. In a test phase all animals were given both food and footshock in the goalbox on every trial. Previously partially punished animals demonstrated greater persistence in running to the goal during this test phase. This 'partial punishment effect' was unchanged by hippocampectomy whether the experiment was conducted with an inter-trial interval of a few minutes or one of 24 h. The presence of the partial punishment effect in hippocampectomised rats is in sharp contrast with the abolition of the partial reinforcement extinction effect (which is very similar to the partial punishment effect, but based upon nonreward rather than punishment) previously reported after hippocampectomy. PMID:6628595

  4. Rotator Cerclage Technique for Partial Rotator Cuff Ruptures

    PubMed Central

    Bozkurt, Murat; Firat, Ahmet; Gursoy, Safa; Akkaya, Mustafa

    2015-01-01

    The frequency of partial rotator cuff tears is gradually increasing because of the advancements in imaging methods and arthroscopy techniques. One of the repair techniques is repair of the partial rotator cuff tear by conversion to a full-thickness tear. Another technique, the transtendon technique, has some practical challenges and risks. We attempted to develop a practical and easy technique with low morbidity to repair partial tears called the rotator cerclage technique. PMID:26900559

  5. Propagation of partially coherent pulsed beams in the spatiotemporal domain.

    PubMed

    Wang, Li-gang; Lin, Qiang; Chen, Hong; Zhu, Shi-yao

    2003-05-01

    A generalized model to describe the spatiotemporal partially coherent pulsed beams is presented. The corresponding propagation formula is derived by using the partially coherent light theory. Based on this formula, we obtain a nonstationary generalized ABCD law (which illustrates the transformation of optical beams or pulses passing through media) to describe the spatiotemporal behavior of partially coherent Gaussian pulsed beams. The physical meaning of such generalized pulsed beams is discussed. An example to illustrate the application of this law is given. PMID:12786302

  6. Modeling partially coupled objects with smooth particle hydrodynamics

    SciTech Connect

    Wingate, C.A.

    1996-10-01

    A very simple phenomenological model is presented to model objects that are partially coupled (i.e. welded or bonded) where usually the coupled interface is weaker than the bulk material. The model works by letting objects fully interact in compression and having the objects only partially interact in tension. A disconnect factor is provided to adjust the tensile interaction to simulate coupling strengths. Three cases of an example impact calculation are shown-no coupling, full coupling and partial coupling.

  7. Partially exposed polymer dispersed liquid crystals for boundary layer investigations

    NASA Technical Reports Server (NTRS)

    Parmar, Devendra S.; Singh, Jag J.

    1992-01-01

    A new configuration termed partially exposed polymer dispersed liquid crystal in which the liquid crystal microdroplets dispersed in a rigid polymer matrix are partially entrapped on the free surface of the thin film deposited on a glass substrate is reported. Optical transmission characteristics of the partially exposed polymer dispersed liquid crystal thin film in response to an air flow induced shear stress field reveal its potential as a sensor for gas flow and boundary layer investigations.

  8. Contralateral breast dose from partial breast brachytherapy.

    PubMed

    Robinson, R Cole; Nelson, Christopher L; Bloom, Elizabeth S; Kisling, Kelly D; Mason, Bryan E; Fisher, Gary D; Kirsner, Steven M

    2015-01-01

    The purpose of this study was to determine the dose to the contralateral breast during accelerated partial breast irradiation (APBI) and to compare it to external beam-published values. Thermoluminescent dosimeter (TLD) packets were used to measure the dose to the most medial aspect of the contralateral breast during APBI simulation, daily quality assurance (QA), and treatment. All patients in this study were treated with a single-entry, multicatheter device for 10 fractions to a total dose of 34 Gy. A mark was placed on the patient's skin on the medial aspect of the opposite breast. Three TLD packets were taped to this mark during the pretreatment simulation. Simulations consisted of an AP and Lateral scout and a limited axial scan encompassing the lumpectomy cavity (miniscan), if rotation was a concern. After the simulation the TLD packets were removed and the patients were moved to the high-dose-rate (HDR) vault where three new TLD packets were taped onto the patients at the skin mark. Treatment was administered with a Nucletron HDR afterloader using Iridium-192 as the treatment source. Post-treatment, TLDs were read (along with the simulation and QA TLD and a set of standards exposed to a known dose of 6 MV photons). Measurements indicate an average total dose to the contralateral breast of 70 cGy for outer quadrant implants and 181 cGy for inner quadrant implants. Compared to external beam breast tangents, these results point to less dose being delivered to the contralateral breast when using APBI. PMID:26699549

  9. Detrecting and Locating Partial Discharges in Transformers

    SciTech Connect

    Shourbaji, A.; Richards, R.; Kisner, R. A.; Hardy, J.

    2005-02-04

    A collaborative research between the Oak Ridge National Laboratory (ORNL), the American Electric Power (AEP), the Tennessee Valley Authority (TVA), and the State of Ohio Energy Office (OEO) has been formed to conduct a feasibility study to detect and locate partial discharges (PDs) inside large transformers. The success of early detection of the PDs is necessary to avoid costly catastrophic failures that can occur if the process of PD is ignored. The detection method under this research is based on an innovative technology developed by ORNL researchers using optical methods to sense the acoustical energy produced by the PDs. ORNL researchers conducted experimental studies to detect PD using an optical fiber as an acoustic sensor capable of detecting acoustical disturbances at any point along its length. This technical approach also has the potential to locate the point at which the PD was sensed within the transformer. Several optical approaches were experimentally investigated, including interferometric detection of acoustical disturbances along the sensing fiber, light detection and ranging (LIDAR) techniques using frequency modulation continuous wave (FMCW), frequency modulated (FM) laser with a multimode fiber, FM laser with a single mode fiber, and amplitude modulated (AM) laser with a multimode fiber. The implementation of the optical fiber-based acoustic measurement technique would include installing a fiber inside a transformer allowing real-time detection of PDs and determining their locations. The fibers are nonconductive and very small (core plus cladding are diameters of 125 μm for single-mode fibers and 230 μm for multimode fibers). The research identified the capabilities and limitations of using optical technology to detect and locate sources of acoustical disturbances such as in PDs in large transformers. Amplitude modulation techniques showed the most promising results and deserve further research to better quantify the technique’s sensitivity

  10. Ozone partially prevents diabetic neuropathy in rats.

    PubMed

    Erken, H A; Genç, O; Erken, G; Ayada, C; Gündoğdu, G; Doğan, H

    2015-02-01

    Neuropathy is one of the most common complications of diabetes mellitus. Although the beneficial effects of good blood glucose control on diabetic neuropathy are known, this control cannot completely prevent the occurrence and progression of diabetic neuropathy. The aim of this study was to investigate whether ozone prevents diabetic neuropathy. 36 adult female Sprague-Dawley rats were randomly divided into 6 groups (n=6): control (C), ozone (O), diabetic (D), ozone-treated diabetic (DO), insulin-treated diabetic (DI), and ozone- and insulin-treated diabetic (DOI). Diabetes was induced by a single injection of streptozotocin (60 mg/kg, intraperitoneal [i.p.]), after which insulin was administered (3 IU, i.p.) to the DI and DOI groups for 28 days, and 1.1 mg/kg (50 µg/ml) ozone was given to the O, DO, and DOI groups for 15 days. 4 weeks after the induction of diabetes, the nerve conduction velocity (NCV), amplitude of the compound action potential (CAP), total oxidant status (TOS), and total antioxidant status (TAS) were measured, and the oxidative stress index (OSI) was calculated. The NCV, amplitude of CAP, and TAS of the DI and DOI groups were higher than those of the D group; the amplitudes of CAP and TAS of the DO group were higher than those of the D group; and the TOS and OSI of the DO, DI, and DOI groups were lower than those of the D group. These findings indicate that ozone partially prevents diabetic neuropathy in rats. It appears that the preventive effects of ozone are mediated through oxidant/antioxidant mechanisms.

  11. Exponential Approximations Using Fourier Series Partial Sums

    NASA Technical Reports Server (NTRS)

    Banerjee, Nana S.; Geer, James F.

    1997-01-01

    The problem of accurately reconstructing a piece-wise smooth, 2(pi)-periodic function f and its first few derivatives, given only a truncated Fourier series representation of f, is studied and solved. The reconstruction process is divided into two steps. In the first step, the first 2N + 1 Fourier coefficients of f are used to approximate the locations and magnitudes of the discontinuities in f and its first M derivatives. This is accomplished by first finding initial estimates of these quantities based on certain properties of Gibbs phenomenon, and then refining these estimates by fitting the asymptotic form of the Fourier coefficients to the given coefficients using a least-squares approach. It is conjectured that the locations of the singularities are approximated to within O(N(sup -M-2), and the associated jump of the k(sup th) derivative of f is approximated to within O(N(sup -M-l+k), as N approaches infinity, and the method is robust. These estimates are then used with a class of singular basis functions, which have certain 'built-in' singularities, to construct a new sequence of approximations to f. Each of these new approximations is the sum of a piecewise smooth function and a new Fourier series partial sum. When N is proportional to M, it is shown that these new approximations, and their derivatives, converge exponentially in the maximum norm to f, and its corresponding derivatives, except in the union of a finite number of small open intervals containing the points of singularity of f. The total measure of these intervals decreases exponentially to zero as M approaches infinity. The technique is illustrated with several examples.

  12. Redefining solubility parameters: the partial solvation parameters.

    PubMed

    Panayiotou, Costas

    2012-03-21

    The present work reconsiders a classical and universally accepted concept of physical chemistry, the solubility parameter. Based on the insight derived from modern quantum chemical calculations, a new definition of solubility parameter is proposed, which overcomes some of the inherent restrictions of the original definition and expands its range of applications. The original single solubility parameter is replaced by four partial solvation parameters reflecting the dispersion, the polar, the acidic and the basic character of the chemical compounds as expressed either in their pure state or in mixtures. Simple rules are adopted for the definition and calculation of these four parameters and their values are tabulated for a variety of common substances. In contrast, however, to the well known Hansen solubility parameters, their design and evaluation does not rely exclusively on the basic rule of "similarity matching" for solubility but it makes also use of the other basic rule of compatibility, namely, the rule of "complementarity matching". This complementarity matching becomes particularly operational with the sound definition of the acidic and basic components of the solvation parameter based on the third σ-moments of the screening charge distributions of the quantum mechanics-based COSMO-RS theory. The new definitions are made in a simple and straightforward manner, thus, preserving the strength and appeal of solubility parameter stemming from its simplicity. The new predictive method has been applied to a variety of solubility data for systems of pharmaceuticals and polymers. The results from quantum mechanics calculations are critically compared with the results from Abraham's acid/base descriptors. PMID:22327537

  13. Stability and Reformation of Partially Eruptive Filament

    NASA Astrophysics Data System (ADS)

    Joshi, Navin Chandra; Prasad Choudhary, Debi; Chandra, Ramesh; Srivastava, Abhishek K.; Dwivedi, B. N.; Kayshap, Pradeep; Filippov, Boris; Uddin, Wahab

    We present an observation of the confined partial filament eruption on 4 August 2012 which later exhibits a rapid reformation along the same magnetic channel within ≈2 hours. We used BBSO and GONG Halpha as well as SDO AIA 171 Å observations to study the filament properties and its kinematics. SDO/AIA observations over the disk are used to study at coronal temperature the plasma dynamics associated with the filament. STEREO/SECCHI provides the limb observations of the filament dynamics. On the basis of the filament internal fine structure as evident in the Halpha observations and its position relative to the photospheric magnetic fields, it is found that the filament chirality is sinistral. On the other hand, the activated enveloping flux rope shows right-handed twist in the SDO/AIA 171 Å observations. Therefore, this dynamic event exhibits one-to-one correspondence between the filament chirality (sinistral) and the enveloping flux rope helicity (positive). Filament plasma goes into dynamic motion at ≈11:20 UT from its middle part towards the north-west direction with an average speed of ≈100 km s(-1) . Brightening underneath the eruptive part of the filament shows the most likely signature of low atmospheric reconnection. After traveling a distance of around ≈215 Mm towards north-west, the cool filament plasma stops and returns back at ≈12:00 UT towards its eastern foot point with the speed of ≈60 km s(-1) . We calculated the coronal magnetic field decay index (n) near the flux rope. Using this estimation, we conjecture that the filament lies within the stability domain n <1, which is the cause of its stability and possibility of prompt reformation.

  14. Redefining solubility parameters: the partial solvation parameters.

    PubMed

    Panayiotou, Costas

    2012-03-21

    The present work reconsiders a classical and universally accepted concept of physical chemistry, the solubility parameter. Based on the insight derived from modern quantum chemical calculations, a new definition of solubility parameter is proposed, which overcomes some of the inherent restrictions of the original definition and expands its range of applications. The original single solubility parameter is replaced by four partial solvation parameters reflecting the dispersion, the polar, the acidic and the basic character of the chemical compounds as expressed either in their pure state or in mixtures. Simple rules are adopted for the definition and calculation of these four parameters and their values are tabulated for a variety of common substances. In contrast, however, to the well known Hansen solubility parameters, their design and evaluation does not rely exclusively on the basic rule of "similarity matching" for solubility but it makes also use of the other basic rule of compatibility, namely, the rule of "complementarity matching". This complementarity matching becomes particularly operational with the sound definition of the acidic and basic components of the solvation parameter based on the third σ-moments of the screening charge distributions of the quantum mechanics-based COSMO-RS theory. The new definitions are made in a simple and straightforward manner, thus, preserving the strength and appeal of solubility parameter stemming from its simplicity. The new predictive method has been applied to a variety of solubility data for systems of pharmaceuticals and polymers. The results from quantum mechanics calculations are critically compared with the results from Abraham's acid/base descriptors.

  15. 83. OVERVIEW OF PARTIALLY COMPLETED POWERHOUSE WITH TWO UNITS IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    83. OVERVIEW OF PARTIALLY COMPLETED POWERHOUSE WITH TWO UNITS IN OPERATION, LOOKING UPSTREAM, Print No. 274, June 1904 - Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce County, WA

  16. The technique of partial identification: waking up to the world.

    PubMed

    Holmes, Lucy

    2009-04-01

    A capacity to make partial identification with others is a skill that brings group members out of the loneliness of narcissism and into the lively world of immediacy and progressive emotional communication. Partial identification, which requires empathy and intuition, involves both knowing what another is feeling and also what we feel toward that other. Developing partial identification will meet with different resistances in men and women. Using clinical examples, the author defines and demonstrates the concept of partial identification and discusses how the pathway to achieving the technique can differ along gender lines.

  17. Partial Dislocations in Graphene and Their Atomic Level Migration Dynamics.

    PubMed

    Robertson, Alex W; Lee, Gun-Do; He, Kuang; Fan, Ye; Allen, Christopher S; Lee, Sungwoo; Kim, Heeyeon; Yoon, Euijoon; Zheng, Haimei; Kirkland, Angus I; Warner, Jamie H

    2015-09-01

    We demonstrate the formation of partial dislocations in graphene at elevated temperatures of ≥500 °C with single atom resolution aberration corrected transmission electron microscopy. The partial dislocations spatially redistribute strain in the lattice, providing an energetically more favorable configuration to the perfect dislocation. Low-energy migration paths mediated by partial dislocation formation have been observed, providing insights into the atomistic dynamics of graphene during annealing. These results are important for understanding the high temperature plasticity of graphene and partial dislocation behavior in related crystal systems, such as diamond cubic materials.

  18. Partially ionized plasmas, including the Third Symposium on Uranium Plasmas

    NASA Technical Reports Server (NTRS)

    Krishnan, M.

    1976-01-01

    Fundamentals of both electrically and fission generated plasmas are discussed. Research in gaseous fuel reactors using uranium hexafluoride is described and other partially ionized plasma applications are discussed.

  19. 34. photographer unknown undated PARTIALLY CONSTRUCTED CRIB NO. 9. NOTE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    34. photographer unknown undated PARTIALLY CONSTRUCTED CRIB NO. 9. NOTE CONTOURING TO FIT IRREGULARITIES OF RIVER BOTTOM. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

  20. Partial-birth abortion: the final frontier of abortion jurisprudence.

    PubMed

    Bopp, J; Cook, C R

    1998-01-01

    Partial-birth abortion bans patterned after the federal bill passed by both houses of Congress are constitutional. The clear legislative definition can be easily distinguished from other abortion procedures. Abortion precedents do not apply to such bans because the abortion right pertains to unborn human beings, not to those partially delivered. Such bans are also rationally-related to legitimate state interests. Even if abortion jurisprudence is deemed to apply in the partial-birth abortion context, a ban is still constitutional under Casey because a ban on partial-birth abortions does not impose an undue burden on the abortion right.

  1. Partial heating and partial salting on double-diffusive convection in an open cavity

    NASA Astrophysics Data System (ADS)

    Arbin, N.; Hashim, I.

    2014-09-01

    Double-diffusive natural convection in an open top square cavity and partially heated from the side is studied numerically. Constant temperatures and concentration are imposed along the right and left walls while the heat balance at the surface is assumed to obey Newton's law of cooling. The finite difference method is used to solve the dimensionless governing equations. The numerical results are reported for the effects of Marangoni number and different heater locations on the contours of streamlines, temperature and concentration. The heat and mass transfer rate in the cavity are measured in terms of the average Nusselt and Sherwood numbers.

  2. A complex Noether approach for variational partial differential equations

    NASA Astrophysics Data System (ADS)

    Naz, R.; Mahomed, F. M.

    2015-10-01

    Scalar complex partial differential equations which admit variational formulations are studied. Such a complex partial differential equation, via a complex dependent variable, splits into a system of two real partial differential equations. The decomposition of the Lagrangian of the complex partial differential equation in the real domain is shown to yield two real Lagrangians for the split system. The complex Maxwellian distribution, transonic gas flow, Maxwellian tails, dissipative wave and Klein-Gordon equations are considered. The Noether symmetries and gauge terms of the split system that correspond to both the Lagrangians are constructed by the Noether approach. In the case of coupled split systems, the same Noether symmetries are obtained. The Noether symmetries for the uncoupled split systems are different. The conserved vectors of the split system which correspond to both the Lagrangians are compared to the split conserved vectors of the complex partial differential equation for the examples. The split conserved vectors of the complex partial differential equation are the same as the conserved vectors of the split system of real partial differential equations in the case of coupled systems. Moreover a Noether-like theorem for the split system is proved which provides the Noether-like conserved quantities of the split system from knowledge of the Noether-like operators. An interesting result on the split characteristics and the conservation laws is shown as well. The Noether symmetries and gauge terms of the Lagrangian of the split system with the split Noether-like operators and gauge terms of the Lagrangian of the given complex partial differential equation are compared. Folklore suggests that the split Noether-like operators of a Lagrangian of a complex Euler-Lagrange partial differential equation are symmetries of the Lagrangian of the split system of real partial differential equations. This is not the case. They are proved to be the same if the

  3. Partial Target Organ Resistance to Thyroid Hormone

    PubMed Central

    Bode, Hans Henning; Danon, Marco; Weintraub, Bruce D.; Maloof, Farahe; Crawford, John D.

    1973-01-01

    to TRH, but the BMR and insensible water loss remained normal. The data suggest that the patient's disorder is due to partial resistance to thyroid hormone. PMID:4632689

  4. Periodontal considerations of the removable partial overdenture.

    PubMed

    Gomes, B C; Renner, R P

    1990-10-01

    1. An overdenture, whether complete or partial, is an excellent mode of treatment in the mutilated dentition for the preservation of the residual ridge. 2. Selection of patients for an overdenture should be based on past history of dental neglect, the status of the teeth and their periodontium, including present oral hygiene status, and patient motivation. The patients with a history of dental neglect, poor oral hygiene, and lack of motivation in having the teeth and the periodontium restored to health as well as strict compliance to a home-care regimen and recall schedule are not good candidates for treatment with an overdenture. 3. The choice of teeth or roots to serve as overdenture abutments must include their periodontal evaluation, which should consist of a detailed periodontal examination, diagnosis, prognosis, and treatment when this is indicated, including chemical protection (fluoride gel) and an oral hygiene regimen tailored to individual needs. 4. The knowledge and expertise in the selection and implementation of appropriate periodontal treatment modalities is of paramount importance in restoring optimum periodontal health to the overdenture abutments before overdenture fabrication. 5. The maintenance phase of the overdenture abutments as well as of the existing natural teeth is of critical importance in the preservation of health of these abutments and teeth. This maintenance phase should consist of periodic recalls based on individual needs; a detailed periodontal evaluation, including patient's motivation and status of oral hygiene and denture hygiene; and detection of caries. If necessary, appropriate periodontal and/or restorative therapy should be performed, and oral hygiene measures reinforced. This will ensure longevity of both abutment teeth or roots and of the existing natural teeth resulting in a long-term success of an overdenture. 6. Because there is evidence of high incidence of periodontal disease and dental caries in overdenture wearers

  5. [Abnormal positions of the heart. An analysis on 1039 cases].

    PubMed

    Mătăsaru, Silvia; Crupa, Maria; Felea, Doina; Cosmescu, Adriana; Barbacariu, Liliana; Petroaie, Antoneta

    2003-01-01

    The aim was to study the impact of the cardiac malpositions into the group of the 1039 congenital heart diseases registered in the Pediatric Outpatient Department of "Sf. Spiridon" hospital. All patients were investigated noninvasively using clinical examination, electrocardiogram, routine Roentgenogram, two-dimensional and Doppler echocardiography, abdominal echography and, only in two cases, cardiac catheterisation. 23 (2.21%) from 1039 congenital heart diseases registered were cardiac malpositions: dextroposition--3 cases (13.04%), dextrocardia--7 cases (30.43%) and situs inversus--13 cases (56.52%). Most of the children were boys (65.21%), 70% from all cases coming from urban area. Only 3 children had structural cardiac anomalies: two cases with dextrocardia (one with atrial septal defect and one with atrioventricular canal) and one with situs inversus and tetralogy of Fallot, two of them suffering surgical correction. Psychological impact was the main problem of these children, especially during the adolescence, except the two cases with structural cardiac abnormalities who needed following and surgical treatment.

  6. Clinical spectrum of primary ciliary dyskinesia in childhood

    PubMed Central

    Fretzayas, Andrew; Moustaki, Maria

    2016-01-01

    Although the triad of bronchiectasis, sinusitis and situs inversus was first described by Kartagener in 1933, the clinical spectrum of primary ciliary dyskinesia is still under investigation. Heterotaxy defects as well as upper and lower respiratory tract symptoms are the main manifestations in childhood. It is now recognized that situs inversus is encountered in only half of patients. The first lower respiratory symptoms may be present from infancy as neonatal respiratory distress. The most common lower airway manifestations are chronic wet cough, recurrent pneumonia and therapy resistant wheezing. Patients are at risk of developing bronchiectasis which may even be the presenting finding due to delayed diagnosis. Upper respiratory tract infections such as nasal congestion, nasal drainage and recurrent sinusitis as well as otologic manifestations such as otitis media or otorrhea with conductive hearing loss are also often encountered. It seems that the type of ciliary ultrastructure defects and the involved mutated genes are associated to some extent to the clinical profile. The disease, even in nowadays, is not recognized at an early age and the primary care clinician should have knowledge of its clinical spectrum in order to select appropriately the children who need further investigation for the diagnosis of this disorder. PMID:26862502

  7. Clinical spectrum of primary ciliary dyskinesia in childhood.

    PubMed

    Fretzayas, Andrew; Moustaki, Maria

    2016-02-01

    Although the triad of bronchiectasis, sinusitis and situs inversus was first described by Kartagener in 1933, the clinical spectrum of primary ciliary dyskinesia is still under investigation. Heterotaxy defects as well as upper and lower respiratory tract symptoms are the main manifestations in childhood. It is now recognized that situs inversus is encountered in only half of patients. The first lower respiratory symptoms may be present from infancy as neonatal respiratory distress. The most common lower airway manifestations are chronic wet cough, recurrent pneumonia and therapy resistant wheezing. Patients are at risk of developing bronchiectasis which may even be the presenting finding due to delayed diagnosis. Upper respiratory tract infections such as nasal congestion, nasal drainage and recurrent sinusitis as well as otologic manifestations such as otitis media or otorrhea with conductive hearing loss are also often encountered. It seems that the type of ciliary ultrastructure defects and the involved mutated genes are associated to some extent to the clinical profile. The disease, even in nowadays, is not recognized at an early age and the primary care clinician should have knowledge of its clinical spectrum in order to select appropriately the children who need further investigation for the diagnosis of this disorder. PMID:26862502

  8. Electrochemical and partial oxidation of methane

    NASA Astrophysics Data System (ADS)

    Singh, Rahul

    2008-10-01

    negligible coke formation on the novel fabricated anode by electroless plating process. Hydrogen is an environmentally cleaner source of energy. The recent increase in the demand of hydrogen as fuel for all types of fuel cells and petroleum refining process has boosted the need of production of hydrogen. Methane, a major component of natural gas is the major feedstock for production of hydrogen. The route of partial oxidation of methane to produce syngas (CO + H2) offers significant advantages over commercialized steam reforming process for higher efficiency and lower energy requirements. Partial oxidation of methane was studied by pulsing O2 into a CH4 flow over Rh/Al2O3 in a sequence of in situ infrared (IR) cell and fixed bed reactor at 773 K. The results obtained from the sequence of an IR cell followed by a fixed bed reactor show that (i) adsorbed CO produced possesses a long residence time, indicating that adsorbed oxygen leading to the formation of CO is significantly different from those leading to CO2 and (ii) CO2 is not an intermediate species for the formation of CO. In situ IR of pulse reaction coupled with alternating reactor sequence is an effective approach to study the primary and secondary reactions as well as the nature of their adsorbed species. As reported earlier, hydrogen remains to be the most effective fuel for fuel cells, the production of high purity hydrogen from naturally available resources such as coal, petroleum, and natural gas requires a number of energy-intensive steps, making fuel cell processes for stationary electric power generation prohibitively uneconomic. Direct use of coal or coal gas as the feed is a promising approach for low cost electricity generation. Coal gas solid oxide fuel cell was studied by pyrolyzing Ohio #5 coal to coal gas and transporting to a Cu anode solid oxide fuel cell to generate power. The study of coal-gas solid oxide fuel cell is divided into two sections, i.e., (i) understanding the composition of coal gas by

  9. 48 CFR 49.112-1 - Partial payments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Partial payments. 49.112-1 Section 49.112-1 Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION CONTRACT MANAGEMENT TERMINATION OF CONTRACTS General Principles 49.112-1 Partial payments. (a) General. If the contract...

  10. 48 CFR 49.109-5 - Partial settlements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Partial settlements. 49.109-5 Section 49.109-5 Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION CONTRACT MANAGEMENT TERMINATION OF CONTRACTS General Principles 49.109-5 Partial settlements. The TCO should...

  11. Partially Flipped Linear Algebra: A Team-Based Approach

    ERIC Educational Resources Information Center

    Carney, Debra; Ormes, Nicholas; Swanson, Rebecca

    2015-01-01

    In this article we describe a partially flipped Introductory Linear Algebra course developed by three faculty members at two different universities. We give motivation for our partially flipped design and describe our implementation in detail. Two main features of our course design are team-developed preview videos and related in-class activities.…

  12. Regularized Partial and/or Constrained Redundancy Analysis

    ERIC Educational Resources Information Center

    Takane, Yoshio; Jung, Sunho

    2008-01-01

    Methods of incorporating a ridge type of regularization into partial redundancy analysis (PRA), constrained redundancy analysis (CRA), and partial and constrained redundancy analysis (PCRA) were discussed. The usefulness of ridge estimation in reducing mean square error (MSE) has been recognized in multiple regression analysis for some time,…

  13. Survival of the Partial Reinforcement Extinction Effect after Contextual Shifts

    ERIC Educational Resources Information Center

    Boughner, Robert L.; Papini, Mauricio R.

    2006-01-01

    The effects of contextual shifts on the partial reinforcement extinction effect (PREE) were studied in autoshaping with rats. Experiment 1 established that the two contexts used subsequently were easily discriminable and equally salient. In Experiment 2, independent groups of rats received acquisition training under partial reinforcement (PRF) or…

  14. The partial Siberian snake experiment at the Brookhaven AGS

    SciTech Connect

    Huang, H.; Caussyn, D.D.; Ellison, T.; Jones, B.; Lee, S.Y.; Schwandt, P.; Ahren, L.; Alessi, J.; Bleser, E.J.; Bunce, G.; Cameron, P.; Courant, E.D.; Foelsche, H.W.; Gardner, C.J.; Geller, J.; Lee, Y.Y.; Makdisi, Y.I.; Mane, S.R.; Ratner, L.; Reece, K.; Roser, T.; Skelly, J.F.; Soukas, A.; Tepikian, S.; Thern, R.E.; van Asselt, W.; Spinka, H.; Teng, L.; Underwood, D.G.; Yokosawa, A.; Wienands, U.; Bharadwaj, V.; Hsueh, S.; Hiramatsu, S.; Mori, Y.; Sato, H.; Yokoya, K.

    1992-12-31

    We are building a 4.7 Tesla-meter room temperature solenoid to be installed in a 10-foot long AGS straight section. This experiment will test the idea of using a partial snake to correct all depolarizing imperfection resonances and also test the feasibility of betatron tune jump in correction intrinsic resonances in the presence of a partial snake.

  15. 20 CFR 10.402 - What is partial disability?

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true What is partial disability? 10.402 Section 10... AMENDED Compensation and Related Benefits Compensation for Disability and Impairment § 10.402 What is partial disability? An injured employee who cannot return to the position held at the time of injury...

  16. Ingestion of a Fixed Partial Denture During General Anesthesia

    PubMed Central

    Neustein, Steve; Beicke, Mark

    2007-01-01

    Dental trauma during anesthesia is a common occurrence. Many patients have had extensive dental work, which is more fragile than the natural dentition. This work may include crowns, fixed partial dentures (bridges), and porcelain veneers. We report for the first time, a case in which a fixed partial denture became dislodged and was ingested, and was recovered postoperatively with endoscopy. PMID:17579503

  17. Partial-rotating piezoelectric actuators for intracytoplasmic sperm injection

    NASA Astrophysics Data System (ADS)

    Tan, K. K.; Putra, A. S.

    2005-12-01

    In this paper, the design of a partially-rotating piezoelectric motor/actuator based on a cylindrical piezoelectric material is presented. A prototype of the motor is developed and its performance, with respect to yielding a controllable partial rotation, is evaluated. The details of the design, development and tests will be duly provided in the paper.

  18. Cautions in the Interpretation of the Partial Correlation Coefficient.

    ERIC Educational Resources Information Center

    Sachar, Jane

    1980-01-01

    The partial correlation coefficient is derived analytically under exemplary factor patterns. In these patterns, variables are described as an additive composition of a set of orthogonal factors, including general, common, and specific factors. Viewed in this framework, it is evident that the partial correlation may yield spurious results.…

  19. 40 CFR 721.10146 - Partially fluorinated condensation polymer (generic).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... polymer (generic). 721.10146 Section 721.10146 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Specific Chemical Substances § 721.10146 Partially fluorinated condensation polymer (generic). (a) Chemical... as partially fluorinated condensation polymer (PMN P-07-87) is subject to reporting under...

  20. 40 CFR 721.10146 - Partially fluorinated condensation polymer (generic).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... polymer (generic). 721.10146 Section 721.10146 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Specific Chemical Substances § 721.10146 Partially fluorinated condensation polymer (generic). (a) Chemical... as partially fluorinated condensation polymer (PMN P-07-87) is subject to reporting under...

  1. 40 CFR 721.10146 - Partially fluorinated condensation polymer (generic).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... polymer (generic). 721.10146 Section 721.10146 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Specific Chemical Substances § 721.10146 Partially fluorinated condensation polymer (generic). (a) Chemical... as partially fluorinated condensation polymer (PMN P-07-87) is subject to reporting under...

  2. Chiral and continuum extrapolation of partially quenched lattice results

    SciTech Connect

    C.R. Allton; W. Armour; D.B. Leinweber; A.W. Thomas; R.D. Young

    2005-04-01

    The vector meson mass is extracted from a large sample of partially quenched, two-flavor lattice QCD simulations. For the first time, discretization, finite-volume and partial quenching artifacts are treated in a unified chiral effective field theory analysis of the lattice simulation results.

  3. 48 CFR 49.112-1 - Partial payments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... TERMINATION OF CONTRACTS General Principles 49.112-1 Partial payments. (a) General. If the contract authorizes... are repaid to the Government within 30 days after demand. (h) Certification and approval of partial payments. (1) The contractor shall place the following certification on vouchers or invoices for...

  4. Partial Retirement and Pension Policy in Industrialized Countries.

    ERIC Educational Resources Information Center

    Latulippe, Denis; Turner, John

    2000-01-01

    Examines the advantages and disadvantages of partial retirement--the transitional period between full-time employment and complete retirement--including easing the transition, labor market effects, and financial implications for social security systems and employers. Reviews partial retirement policies in eight countries and concludes that there…

  5. 13 CFR 307.20 - Partial liquidation; liquidation upon termination.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... an RLF Grant, EDA may assign or transfer assets of the RLF to an RLF Third Party for liquidation. (c... Revolving Loan Funds and Use of Grant Funds § 307.20 Partial liquidation; liquidation upon termination. (a) Partial liquidation or disallowance of a portion of an RLF Grant. If the RLF Recipient engages in...

  6. 21 CFR 872.3600 - Partially fabricated denture kit.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Partially fabricated denture kit. 872.3600 Section 872.3600 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3600 Partially fabricated denture kit....

  7. 21 CFR 872.3600 - Partially fabricated denture kit.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Partially fabricated denture kit. 872.3600 Section 872.3600 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3600 Partially fabricated denture kit....

  8. Partial end organ resistance to thyroid hormone in congenital hypothyroidism

    PubMed Central

    Connell, John M. C.; McLaren, E. H.

    1981-01-01

    End organ resistance to thyroid hormone has been described for a number of years: the defect may be partial or generalized. A case of partial end organ resistance to thyroid hormone in congenital hypothyroidism is described, with evidence of an alteration in TSH threshold to feedback inhibition by thyroid hormone. The implications of this factor in the management of hypothyroidism are discussed. PMID:7301701

  9. 46 CFR 189.30-1 - General or partial survey.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false General or partial survey. 189.30-1 Section 189.30-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS INSPECTION AND CERTIFICATION Inspection After Accident § 189.30-1 General or partial survey. (a) A survey,...

  10. 46 CFR 189.30-1 - General or partial survey.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false General or partial survey. 189.30-1 Section 189.30-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS INSPECTION AND CERTIFICATION Inspection After Accident § 189.30-1 General or partial survey. (a) A survey,...

  11. 48 CFR 19.502-3 - Partial set-asides.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Partial set-asides. 19.502... SOCIOECONOMIC PROGRAMS SMALL BUSINESS PROGRAMS Set-Asides for Small Business 19.502-3 Partial set-asides. (a) The contracting officer shall set aside a portion of an acquisition, except for construction,...

  12. 48 CFR 219.502-3 - Partial set-asides.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Partial set-asides. 219..., DEPARTMENT OF DEFENSE SOCIOECONOMIC PROGRAMS SMALL BUSINESS PROGRAMS Set-Asides for Small Business 219.502-3 Partial set-asides. (c)(1) If the North American Industry Classification System Industry Subsector of...

  13. 46 CFR 189.30-1 - General or partial survey.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false General or partial survey. 189.30-1 Section 189.30-1... AND CERTIFICATION Inspection After Accident § 189.30-1 General or partial survey. (a) A survey, either... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  14. 46 CFR 189.30-1 - General or partial survey.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false General or partial survey. 189.30-1 Section 189.30-1... AND CERTIFICATION Inspection After Accident § 189.30-1 General or partial survey. (a) A survey, either... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  15. 46 CFR 91.30-1 - General or partial survey.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false General or partial survey. 91.30-1 Section 91.30-1... INSPECTION AND CERTIFICATION Inspection After Accident § 91.30-1 General or partial survey. (a) A survey... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  16. 46 CFR 71.40-1 - General or partial survey.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false General or partial survey. 71.40-1 Section 71.40-1... CERTIFICATION Inspection After Accident § 71.40-1 General or partial survey. (a) A survey, either general or... survey shall be such as to insure that the necessary repairs or renewals have been effectively made,...

  17. 46 CFR 71.40-1 - General or partial survey.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 3 2013-10-01 2013-10-01 false General or partial survey. 71.40-1 Section 71.40-1... CERTIFICATION Inspection After Accident § 71.40-1 General or partial survey. (a) A survey, either general or... survey shall be such as to insure that the necessary repairs or renewals have been effectively made,...

  18. 46 CFR 71.40-1 - General or partial survey.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 3 2014-10-01 2014-10-01 false General or partial survey. 71.40-1 Section 71.40-1... CERTIFICATION Inspection After Accident § 71.40-1 General or partial survey. (a) A survey, either general or... survey shall be such as to insure that the necessary repairs or renewals have been effectively made,...

  19. 46 CFR 91.30-1 - General or partial survey.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false General or partial survey. 91.30-1 Section 91.30-1... INSPECTION AND CERTIFICATION Inspection After Accident § 91.30-1 General or partial survey. (a) A survey... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  20. 46 CFR 71.40-1 - General or partial survey.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 3 2012-10-01 2012-10-01 false General or partial survey. 71.40-1 Section 71.40-1... CERTIFICATION Inspection After Accident § 71.40-1 General or partial survey. (a) A survey, either general or... survey shall be such as to insure that the necessary repairs or renewals have been effectively made,...

  1. 46 CFR 91.30-1 - General or partial survey.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false General or partial survey. 91.30-1 Section 91.30-1... INSPECTION AND CERTIFICATION Inspection After Accident § 91.30-1 General or partial survey. (a) A survey... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  2. 46 CFR 91.30-1 - General or partial survey.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false General or partial survey. 91.30-1 Section 91.30-1... INSPECTION AND CERTIFICATION Inspection After Accident § 91.30-1 General or partial survey. (a) A survey... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  3. 46 CFR 91.30-1 - General or partial survey.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false General or partial survey. 91.30-1 Section 91.30-1... INSPECTION AND CERTIFICATION Inspection After Accident § 91.30-1 General or partial survey. (a) A survey... made. The survey shall be such as to insure that the necessary repairs or renewals have...

  4. 46 CFR 189.30-1 - General or partial survey.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false General or partial survey. 189.30-1 Section 189.30-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS INSPECTION AND CERTIFICATION Inspection After Accident § 189.30-1 General or partial survey. (a) A survey,...

  5. Teaching Modeling with Partial Differential Equations: Several Successful Approaches

    ERIC Educational Resources Information Center

    Myers, Joseph; Trubatch, David; Winkel, Brian

    2008-01-01

    We discuss the introduction and teaching of partial differential equations (heat and wave equations) via modeling physical phenomena, using a new approach that encompasses constructing difference equations and implementing these in a spreadsheet, numerically solving the partial differential equations using the numerical differential equation…

  6. The Role of Partial and Best Matches in Knowledge Systems.

    ERIC Educational Resources Information Center

    Hayes-Roth, Frederick

    This paper is a theoretical discussion of several functions of knowledge systems based on the idea of partial matching, that is, comparison of two or more descriptions by identification of their similarities. Several knowledge system functions are described in terms of partial or best matchings including analogical reasoning, inductive inference,…

  7. How to Compute the Partial Fraction Decomposition without Really Trying

    ERIC Educational Resources Information Center

    Brazier, Richard; Boman, Eugene

    2007-01-01

    For various reasons there has been a recent trend in college and high school calculus courses to de-emphasize teaching the Partial Fraction Decomposition (PFD) as an integration technique. This is regrettable because the Partial Fraction Decomposition is considerably more than an integration technique. It is, in fact, a general purpose tool which…

  8. 38 CFR 36.4316 - Acceptability of partial payments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (CONTINUED) LOAN GUARANTY Guaranty or Insurance of Loans to Veterans With Electronic Reporting § 36.4316 Acceptability of partial payments. A partial payment is a remittance by or on behalf of the borrower on a loan... the loan and security instruments at the time the remittance is tendered. (a) Except as provided...

  9. 40 CFR 721.10146 - Partially fluorinated condensation polymer (generic).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... polymer (generic). 721.10146 Section 721.10146 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Specific Chemical Substances § 721.10146 Partially fluorinated condensation polymer (generic). (a) Chemical... as partially fluorinated condensation polymer (PMN P-07-87) is subject to reporting under...

  10. 40 CFR 721.10146 - Partially fluorinated condensation polymer (generic).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... polymer (generic). 721.10146 Section 721.10146 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Specific Chemical Substances § 721.10146 Partially fluorinated condensation polymer (generic). (a) Chemical... as partially fluorinated condensation polymer (PMN P-07-87) is subject to reporting under...

  11. The Use of Partial Order Structures for Investigating Suicidal Behavior.

    ERIC Educational Resources Information Center

    Dancer, L. Suzanne

    This study had two purposes: to test the usefulness of partial order scalogram analysis with multivariate response data; and to illustrate the multidimensional nature of suicide risk. A detailed introduction describes partial order scalograms, which locate respondents' profiles in a two-dimensional space (rather than on a unidimensional Guttman…

  12. 26 CFR 1.346-1 - Partial liquidation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 4 2010-04-01 2010-04-01 false Partial liquidation. 1.346-1 Section 1.346-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Definition § 1.346-1 Partial liquidation. (a) General. This section defines a...

  13. Partial melting on the acapulcoite-lodranite meteorite parent body

    NASA Astrophysics Data System (ADS)

    McCoy, Timothy James

    1994-01-01

    Many asteroids experienced partial melting and incomplete differentiation. Our knowledge of the detailed of these processes are incomplete, owing to the paucity of partially melted meteorites. 1 studied two groups of meteorites which originated on a common parent body and are residues of a wide range of partial melting acapulcoites and lodranites. These meteorites formed from a chemically and isotopically heterogeneous precursor chondrite. Heating and cooling occurred early in the history of the solar system, as evidenced by the approximately 4.51 Ga 39 Ar40Ar age of acapulcoites and the approximately 4.48 Ga39Ar40Ar age of the lodranite Gibson. The heating was probably caused by non-collisional heat sources. Acapulcoites (Acapulco, Monument Draw, Yamato 74063, ALH A77081, ALH A81261, ALH A81315, ALH 78230, ALH A81187 and ALH 84190) formed by low degrees of partial melting (e.g., Fe, Ni-FeS eutectic melting, but not silicate partial melting). Fe, Ni-FeS partial melts concentrated into micron- to centimeter-sized veins, but migration distances were short. In contrast, lodranites (Lodran, Gibson, Yamato 791491, Yamato 791493, Yamato 74357, Yamato 8002, Yamato 75274, MAC 88177, LEW 88280, EET 84302 and FRO 90011) experienced higher degrees of partial melting, including silicate partial melting. The higher degree of partial melting allowed efficient melt migration, depleting the residues in plagioclase and troilite. Volatiles played a major role in melt migration, driving partial melts to the surface where they were erupted at greater than the escape velocity and lost into space, Thus, basaltic partial melts are not sampled as discrete meteorites. In one meteorite (LEW 86220), these basaltic, Fe, Ni, FeS-rich partial melts from a lodranite source region were injected into a cooler, acapulcoite region. The acapulcoite-lodranite parent body experienced a range of partial melting and melt migration. Cooling of this body may have been complex, with slow cooling at high

  14. Secondary partial empty sella syndrome in an elite bodybuilder.

    PubMed

    Dickerman, R D; Jaikumar, S

    2001-06-01

    The pituitary gland is a hormone-responsive gland and is known to vary in size depending on the hormonal status of the patient and the multifaceted positive and negative feedback hypothalamic-pituitary-gonadal axis. Partial empty sella syndrome with an atrophied pituitary gland is seen in primary neuroendocrinopathies such as growth hormone deficiency, primary hypothyroidism, central diabetes insipidus and hypogonadism. Partial empty sella has also been shown to occur in patients with elevations in intracranial pressure. Secondary partial empty sella syndrome with significant pituitary gland atrophy from negative feedback inhibition of long-term exogenous hormonal use has not been previously reported. We are reporting on a case of partial empty sella syndrome occurring in an elite bodybuilder with a long history of exogenous abuse of growth hormone, testosterone and thyroid hormone. The pathophysiological mechanisms of secondary partial empty sella syndrome from exogenous hormone use and the possibility for elevations in intracranial pressure contributing to this syndrome will be discussed.

  15. Partial-wave expansions of angular spectra of plane waves.

    PubMed

    Lock, James A

    2006-11-01

    Focused electromagnetic beams are frequently modeled by either an angular spectrum of plane waves or a partial-wave sum of spherical multipole waves. The connection between these two beam models is explored here. The partial-wave expansion of an angular spectrum containing evanescent components is found to possess only odd partial waves. On the other hand, the partial-wave expansion of an alternate angular spectrum constructed so as to be free of evanescent components contains all partial waves but describes a propagating beam with a small amount of standing-wave component mixed in. A procedure is described for minimizing the standing-wave component so as to more accurately model a purely forward propagating experimental beam.

  16. Partial site release at a power reactor facility.

    PubMed

    Darman, Joseph; Whitney, Michael; Dubiel, Richard

    2004-01-01

    U.S. NRC licensed facilities undergoing decommissioning may wish to remove portions of their site from the jurisdiction of their license, prior to final license termination. The method of partial site release, relevant to radiological conditions, described herein employs NUREG-1505 methodology for demonstrating indistinguishability from background. The partial site release process was also informed by NRC Regulatory Issue Summary 2000-19 "Partial Release of Reactor Site for Unrestricted Use Before NRC Approval of the License Termination Plan." However, the focus of this discussion is the radiological aspects of partial site release, relevant to the implementation of NUREG-1505 methodology for demonstrating indistinguishability from background, based on the 137Cs concentrations at the site and a suitable background reference area. This type of approach was found acceptable by the NRC, and the partial site release was granted. PMID:14695009

  17. Mechanistic studies of partial-filing micellar electrokinetic chromatography

    SciTech Connect

    Nelson, W.M.; Lee, C.S. |

    1996-09-15

    The need for coupling micellar electrokinetic chromatography (MEKC) with electrospray mass spectrometry initiates the development of partial-filling MEKC. In comparison with conventional MEKC, only a small portion of the capillary is filled with a micellar solution for performing the separation in partial-filling MEKC. Analytes first migrate into the micellar plug, where the separation occurs, and then into the leading electrophoresis buffer, which is free of surfactants. A theoretical model is proposed for predicting the separation behavior of triazine herbicides in partial-filling MEKC. The comparisons between conventional and partial-filling MEKC in terms of separation efficiency and resolution of triazine herbicides are presented and discussed. The optimization techniques, possible applications, and advantages of partial-filling MEKC are similarly addressed. 11 refs., 6 figs., 5 tabs.

  18. Apparatus for the concurrent ultrasonic inspection of partially completed welds

    DOEpatents

    Johnson, John A.

    2000-01-01

    An apparatus for the concurrent nondestructive evaluation of partially completed welds is described and which is used in combination with an automated welder and which includes an ultrasonic signal generator mounted on the welder and which generates an ultrasonic signal which is directed toward one side of the partially completed welds; an ultrasonic signal receiver mounted on the automated welder for detecting ultrasonic signals which are transmitted by the ultrasonic signal generator and which are reflected or diffracted from one side of the partially completed weld or which passes through a given region of the partially completed weld; and an analysis assembly coupled with the ultrasonic signal receiver and which processes the ultrasonic signals received by the ultrasonic signal receiver to identify welding flaws in the partially completed weld.

  19. Enhancing teleportation of quantum Fisher information by partial measurements

    NASA Astrophysics Data System (ADS)

    Xiao, Xing; Yao, Yao; Zhong, Wo-Jun; Li, Yan-Ling; Xie, Ying-Mao

    2016-01-01

    The purport of quantum teleportation is to completely transfer information from one party to another distant partner. However, from the perspective of parameter estimation, it is the information carried by a particular parameter, not the information of total quantum state that needs to be teleported. Due to the inevitable noise in environments, we propose two schemes to enhance quantum Fisher information (QFI) teleportation under amplitude damping noise with the technique of partial measurements. We find that post-partial measurement can greatly enhance the teleported QFI, while the combination of prior partial measurement and post-partial measurement reversal could completely eliminate the effect of decoherence. We show that, somewhat consequentially, enhancing QFI teleportation is more economic than that of improving fidelity teleportation. Our work extends the ability of partial measurements as a quantum technique to battle decoherence in quantum information processing.

  20. Implants in conjunction with removable partial dentures: a literature review.

    PubMed

    Mijiritsky, Eitan

    2007-06-01

    Although the benefits of implant-borne removable prostheses are readily apparent for the fully edentulous patient and have been well documented, there is a paucity of studies concerning the combination of implants with removable partial dentures in partially edentulous patients. The aim of this article is to review the literature regarding implants with removable partial dentures and evaluate the evidence for this clinical approach. A MEDLINE/PubMed search from 1990 to 2006, focusing on the use of implants with removable partial dentures and related features, was supplemented with a hand search to identify relevant peer-reviewed English articles published in dental journals and textbooks on removable partial dentures. PMID:17563505

  1. Full and Partial Admission Performance of the Simplex Turbine

    NASA Technical Reports Server (NTRS)

    Dorney, D. J.; Griffin, L. W.; Sondak, D. L.; Turner, James (Technical Monitor)

    2002-01-01

    The turbines used in rocket-engine applications are often partial-admission turbines, meaning that the flow enters the rotor over only a portion of the annulus. These turbines have been traditionally analyzed, however, assuming full-admission characteristics. This assumption enables the simulation of only a portion of the 360-degree annulus, with periodic boundary conditions applied in the circumferential direction. While this traditional approach to the simulating the flow in partial-admission turbines significantly reduces the computational requirements, the accuracy of the solutions has rarely been evaluated. In the current investigation, both full- and partial-admission three dimensional unsteady Navier-Stokes simulations were performed for a partial-admission turbine designed and tested at NASA Marshall Space Flight Center. The results indicate that the partial-admission nature of the turbine must be included in simulations to properly predict the performance and flow unsteadiness of the turbine.

  2. Partial-wave expansions of angular spectra of plane waves

    NASA Astrophysics Data System (ADS)

    Lock, James A.

    2006-11-01

    Focused electromagnetic beams are frequently modeled by either an angular spectrum of plane waves or a partial-wave sum of spherical multipole waves. The connection between these two beam models is explored here. The partial-wave expansion of an angular spectrum containing evanescent components is found to possess only odd partial waves. On the other hand, the partial-wave expansion of an alternate angular spectrum constructed so as to be free of evanescent components contains all partial waves but describes a propagating beam with a small amount of standing-wave component mixed in. A procedure is described for minimizing the standing-wave component so as to more accurately model a purely forward propagating experimental beam.

  3. Partial cone calix[4]arene-crown-6-ethers

    SciTech Connect

    Das, G.; Sachleben, R.A.; Descazeaud, T.; Bryan, J.C.; Moyer, B.A.

    1997-12-31

    Partial cone calix[4] arene crown ethers represents a new category of lariat ethers. In general, calix arene crown ethers have been previously shown to be efficient extractants for metal cations. Appropriately substituted cone and 1, 3-alt conformers of calix crowns exhibit selectivities for Na{sup +} and Cs{sup +}, respectively. The partial cone conformers have not been as throughly studied. We have developed an efficient method of synthesis of partial cone calix[4]arene-crown ethers and have synthesized a variety of partial cone calix[4]arene crowns. Solution and solid-state structures of representative examples have been determined by {sup 1}H NMR spectroscopy and X-ray crystallography. Relative affinities of these partial cone calix[4]arene crowns for alkali metal ions have been investigated by solvent extraction techniques.

  4. Development of partial failure analysis method in probability risk assessments

    SciTech Connect

    Ni, T.; Modarres, M.

    1996-12-01

    This paper presents a new approach to evaluate the partial failure effect on current Probability Risk Assessments (PRAs). An integrated methodology of the thermal-hydraulic analysis and fuzzy logic simulation using the Dynamic Master Logic Diagram (DMLD) was developed. The thermal-hydraulic analysis used in this approach is to identify partial operation effect of any PRA system function in a plant model. The DMLD is used to simulate the system performance of the partial failure effect and inspect all minimal cut sets of system functions. This methodology can be applied in the context of a full scope PRA to reduce core damage frequency. An example of this application of the approach is presented. The partial failure data used in the example is from a survey study of partial failure effects from the Nuclear Plant Reliability Data System (NPRDS).

  5. Replicating and Extending Research on the Partial Assignment Completion Effect: Is Sunk Cost Related to Partial Assignment Completion Strength?

    ERIC Educational Resources Information Center

    Hawthorn-Embree, Meredith L.; Taylor, Emily P.; Skinner, Christopher H.; Parkhurst, John; Nalls, Meagan L.

    2014-01-01

    After students acquire a skill, mastery often requires them to choose to engage in assigned academic activities (e.g., independent seatwork, and homework). Although students may be more likely to choose to work on partially completed assignments than on new assignments, the partial assignment completion (PAC) effect may not be very powerful. The…

  6. Partial slip in mesoscale contacts: dependence on contact size.

    PubMed

    Hanke, Sylvia; Petri, Judith; Johannsmann, Diethelm

    2013-09-01

    Using acoustic resonators, we have studied the occurrence and the magnitude of partial slip between glass spheres and polymer surfaces. The measurement relies on the shifts of resonance frequency and bandwidth, Δf and ΔΓ, induced by the contact as well as the dependence of Δf and ΔΓ on the amplitude of oscillation. One often finds a decrease of Δf at elevated amplitudes, which goes back to partial slip (also "microslip"). Building on two different models of partial slip, we derive the frequency-amplitude relation from the force-displacement relation. In accordance with both models, the bandwidth is found to increase with amplitude in the partial slip regime. For the highest amplitudes and largest spheres investigated, one observes a decrease of bandwidth with amplitude, which is interpreted as a transition to gross slip. Deviating from both models of partial slip, Δf is sometimes found to be independent of amplitude in the low-amplitude range. Constant Δf implies linear force-displacement relations. The critical amplitude for the onset of partial slip depends on the contact radius, where partial slip is more pronounced for larger contacts. This finding can be explained by a smooth stress profile at the edge of the contact with no singularity. The stress at the edge might be lowered by nanoscale roughness, by capillary forces, or by the inability of the two surfaces to reestablish a sticking contact at the turning point of the oscillation.

  7. Model-based approach to partial tracking for musical transcription

    NASA Astrophysics Data System (ADS)

    Sterian, Andrew; Wakefield, Gregory H.

    1998-10-01

    We present a new method for musical partial tracking in the context of musical transcription using a time-frequency Kalman filter structure. The filter is based upon a model for the evolution of a partial behavior across a wide range of pitch from four brass instruments. Statistics are computed independently for the partial attributes of frequency and log-power first differences. We present observed power spectral density shapes, total powers, and histograms, as well as least-squares approximations to these. We demonstrate that a Kalman filter tracker using this partial model is capable of tracking partials in music. We discuss how the filter structure naturally provides quality-of-fit information about the data for use in further processing and how this information can be used to perform partial track initiation and termination within a common framework. We propose that a model-based approach to partial tracking is preferable to existing approaches which generally use heuristic rules or birth/death notions over a small time neighborhood. The advantages include better performance in the presence of cluttered data and simplified tracking over missed observations.

  8. Salt bridge as a gatekeeper against partial unfolding.

    PubMed

    Hinzman, Mark W; Essex, Morgan E; Park, Chiwook

    2016-05-01

    Salt bridges are frequently observed in protein structures. Because the energetic contribution of salt bridges is strongly dependent on the environmental context, salt bridges are believed to contribute to the structural specificity rather than the stability. To test the role of salt bridges in enhancing structural specificity, we investigated the contribution of a salt bridge to the energetics of native-state partial unfolding in a cysteine-free version of Escherichia coli ribonuclease H (RNase H*). Thermolysin cleaves a protruding loop of RNase H(*) through transient partial unfolding under native conditions. Lys86 and Asp108 in RNase H(*) form a partially buried salt bridge that tethers the protruding loop. Investigation of the global stability of K86Q/D108N RNase H(*) showed that the salt bridge does not significantly contribute to the global stability. However, K86Q/D108N RNase H(*) is greatly more susceptible to proteolysis by thermolysin than wild-type RNase H(*) is. The free energy for partial unfolding determined by native-state proteolysis indicates that the salt bridge significantly increases the energy for partial unfolding by destabilizing the partially unfolded form. Double mutant cycles with single and double mutations of the salt bridge suggest that the partially unfolded form is destabilized due to a significant decrease in the interaction energy between Lys86 and Asp108 upon partial unfolding. This study demonstrates that, even in the case that a salt bridge does not contribute to the global stability, the salt bridge may function as a gatekeeper against partial unfolding that disturbs the optimal geometry of the salt bridge. PMID:26916981

  9. Optimal moving grids for time-dependent partial differential equations

    NASA Technical Reports Server (NTRS)

    Wathen, A. J.

    1989-01-01

    Various adaptive moving grid techniques for the numerical solution of time-dependent partial differential equations were proposed. The precise criterion for grid motion varies, but most techniques will attempt to give grids on which the solution of the partial differential equation can be well represented. Moving grids are investigated on which the solutions of the linear heat conduction and viscous Burgers' equation in one space dimension are optimally approximated. Precisely, the results of numerical calculations of optimal moving grids for piecewise linear finite element approximation of partial differential equation solutions in the least squares norm.

  10. The Painlevé property for partial differential equations

    NASA Astrophysics Data System (ADS)

    Weiss, John; Tabor, M.; Carnevale, George

    1983-03-01

    In this paper we define the Painlevé property for partial differential equations and show how it determines, in a remarkably simple manner, the integrability, the Bäcklund transforms, the linearizing transforms, and the Lax pairs of three well-known partial differential equations (Burgers' equation, KdV equation, and the modified KdV equation). This indicates that the Painlevé property may provide a unified description of integrable behavior in dynamical systems (ordinary and partial differential equations), while, at the same time, providing an efficient method for determining the integrability of particular systems.

  11. Autoionization of He atoms by partially stripped ion impact

    SciTech Connect

    Otranto, S.; Olson, R.E.

    2005-08-15

    A study of the autoionization process induced by partially stripped ion impact is performed. Electron spectra in momentum space are predicted within a classical model for partially stripped ions. The results are compared with those obtained for pure Coulomb-like projectiles. A quantum-mechanical extension of the Barrachina-Macek model is proposed for partially stripped projectiles. Structure on the electron angular distribution arising in quantum and classical treatments is identified and compared. The presence of rainbow scattering interference is observed in the binary ring profile of the outgoing autoionized electrons for positive-ion impact.

  12. Initiation, Propagation, and Termination of Partial (Focal) Seizures

    PubMed Central

    de Curtis, Marco; Avoli, Massimo

    2016-01-01

    The neurophysiological patterns that correlate with partial (focal) seizures are well defined in humans by standard electroencephalogram (EEG) and presurgical depth electrode recordings. Seizure patterns with similar features are reproduced in animal models of partial seizures and epilepsy. However, the network determinants that support interictal spikes, as well as the initiation, progression, and termination of seizures, are still elusive. Recent findings show that inhibitory networks are prominently involved at the onset of these seizures, and that extracellular changes in potassium contribute to initiate and sustain seizure progression. The end of a partial seizure correlates with an increase in network synchronization, which possibly involves both excitatory and inhibitory mechanisms. PMID:26134843

  13. UHF ground penetration measurements of buried and partially buried trihedrals

    SciTech Connect

    Blejer, D.; Frost, C.; Scarborough, S.

    1994-12-31

    The Lincoln Laboratory ground-based rail SAR was used to collect UHF band data on buried and partially buried trihedral corner reflectors in Yuma soil. The frequency range was 0.25 to 1 GHz in descrete steps. Both HH and VV polarization data were collected in the vicinity of the pseudo-Brewster angle. The partially buried trihedrals revealed two principal components for the returned signals: (1) a surface reflected component, and (2) a ground penetrated component. A model is described for partially buried trihedrals that accounts for these two components and the model is used in estimating ground penetration parameters.

  14. Using Dynamic Master Logic Diagram for component partial failure analysis

    SciTech Connect

    Ni, T.; Modarres, M.

    1996-12-01

    A methodology using the Dynamic Master Logic Diagram (DMLD) for the evaluation of component partial failure is presented. Since past PRAs have not focused on partial failure effects, the reliability of components are only based on the binary state assumption, i.e. defining a component as fully failed or functioning. This paper is to develop an approach to predict and estimate the component partial failure on the basis of the fuzzy state assumption. One example of the application of this methodology with the reliability function diagram of a centrifugal pump is presented.

  15. Partial return yoke for MICE step IV and final step

    SciTech Connect

    Witte, H.; Plate, S.; Berg, J. S.; Tarrant, J.; Bross, A.

    2015-05-03

    This paper reports on the progress of the design and construction of a retro-fitted return yoke for the international Muon Ionization Cooling Experiment (MICE). MICE is a proof-of-principle experiment aiming to demonstrate ionization cooling experimentally. In earlier studies we outlined how a partial return yoke can be used to mitigate stray magnetic field in the experimental hall; we report on the progress of the construction of the partial return yoke for MICE Step IV. We also discuss an extension of the Partial Return Yoke for the final step of MICE; we show simulation results of the expected performance.

  16. Partial Return Yoke for MICE Step IV and Final Step

    SciTech Connect

    Witte, Holger; Plate, Stephen; Berg, J.Scott; Tarrant, Jason; Bross, Alan

    2015-06-01

    This paper reports on the progress of the design and construction of a retro-fitted return yoke for the international Muon Ionization Cooling Experiment (MICE). MICE is a proof-of-principle experiment aiming to demonstrate ionization cooling experimentally. In earlier studies we outlined how a partial return yoke can be used to mitigate stray magnetic field in the experimental hall; we report on the progress of the construction of the partial return yoke for MICE Step IV. We also discuss an extension of the Partial Return Yoke for the final step of MICE; we show simulation results of the expected performance.

  17. Inspection apparatus for evaluating a partially completed weld

    DOEpatents

    Smartt, Herschel B.; Larsen, Eric D.; Johnson, Jonn A.

    2001-01-01

    An inspection apparatus for evaluating a partially completed weld is described and which is utilized in combination with an automated movable welder which moves across a supporting surface, and wherein the inspection apparatus includes a coupling member mounted on the welder; a frame member mounted on the coupling member; an ultrasonic sensor mounted on the frame member and disposed in ultrasonic sound transmitting relation relative to the partially completed weld; and a drive assembly for adjusting the position of the ultrasonic sensor relative to the partially completed weld.

  18. Application of partial sliding mode in guidance problem.

    PubMed

    Shafiei, M H; Binazadeh, T

    2013-03-01

    In this paper, the problem of 3-dimensional guidance law design is considered and a new guidance law based on partial sliding mode technique is presented. The approach is based on the classification of the state variables within the guidance system dynamics with respect to their required stabilization properties. In the proposed law by using a partial sliding mode technique, only trajectories of a part of states variables are forced to reach the partial sliding surfaces and slide on them. The resulting guidance law enables the missile to intercept highly maneuvering targets within a finite interception time. Effectiveness of the proposed guidance law is demonstrated through analysis and simulations.

  19. Impact of partial DAZ1/2 deletion and partial DAZ3/4 deletion on male infertility.

    PubMed

    Zhang, Yuening; Li, Muyan; Xiao, Feifan; Teng, Ruobing; Zhang, Chengdong; Lan, Aihua; Gu, Kailong; Li, Jiatong; Wang, Di; Li, Hongtao; Jiang, Li; Zeng, Siping; He, Min; Huang, Yi; Guo, Peifen; Zhang, Xinhua; Yang, Xiaoli

    2015-10-15

    This study aims to investigate the effect of the partial DAZ1/2 deletion and partial DAZ3/4 deletion on male infertility through a comprehensive literature search. All case-control studies related to partial DAZ1/2 and DAZ3/4 deletions and male infertility risk were included in our study. Odd ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of the association and its precision, respectively. Eleven partial DAZ1/2 deletion and nine partial DAZ3/4 deletion studies were included. Partial DAZ1/2 deletion was significantly associated with male infertility risk in the overall analysis (ORs=2.58, 95%CI: 1.60-4.18, I(2)=62.1%). Moreover, in the subgroup analysis stratified by ethnicity, partial DAZ1/2 deletion was significantly associated with male infertility risk in the East Asian populations under the random effect model (ORs=2.96, 95%CI: 1.87-4.71, I(2)=51.3%). Meanwhile, the analysis suggested that partial DAZ3/4 deletion was not associated with male infertility risk in East-Asian ethnicity (ORs=1.02, 95%CI: 0.54-1.92, I(2)=71.3%), but not in Non-East Asian under the random effect model (ORs=3.56, 95%CI: 1.13-11.23, I(2)=0.0%,). More interestingly, partial DAZ1/2 deletion was associated with azoospermia (ORs=2.63, 95%CI: 1.19-5.81, I(2)=64.7%) and oligozoospermia (ORs=2.53, 95%CI: 1.40-4.57, I(2)=51.8%), but partial DAZ3/4 deletion was not associated with azoospermia (ORs=0.71, 95%CI: 0.23-2.22, I(2)=71.7%,) and oligozoospermia (ORs=1.21, 95%CI: 0.65-2.24, I(2)=55.5%). In our meta-analysis, partial DAZ1/2 deletion is a risk factor for male infertility and different ethnicities have different influences, whereas partial DAZ3/4 deletion has no effect on fertility but partial DAZ3/4 deletion might have an impact on Non-East Asian male.

  20. 70. VIEW OF PARTIALLY COMPLETED FLUME BELOW THE AUTOMATIC SPILL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    70. VIEW OF PARTIALLY COMPLETED FLUME BELOW THE AUTOMATIC SPILL AT THE RESERVOIR, SHOWING MOUNT RAINIER IN THE DISTANCE, Print No. 192, December 1903 - Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce County, WA

  1. 4. View northeast of west (partial) and south elevations. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. View northeast of west (partial) and south elevations. - Natick Research & Development Laboratories, Climatic Chambers Building, U.S. Army Natick Research, Development & Engineering Center (NRDEC), Natick, Middlesex County, MA

  2. 5. View northwest of south (partial) and east elevations. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. View northwest of south (partial) and east elevations. - Natick Research & Development Laboratories, Climatic Chambers Building, U.S. Army Natick Research, Development & Engineering Center (NRDEC), Natick, Middlesex County, MA

  3. 1. Mill exterior, high grade chute partially restored on the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Mill exterior, high grade chute partially restored on the outside of mill building center of picture. Looking northeast from below bridge. - Kennecott Copper Corporation, Concentration Mill, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

  4. 63. DETAIL VIEW OF LIGHT METAL TRUSSING SYSTEM ON PARTIALLY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    63. DETAIL VIEW OF LIGHT METAL TRUSSING SYSTEM ON PARTIALLY DEMOLISHED GABLE END OF UNIDENTIFIED BUILDING. - Baltimore & Ohio Railroad, Mount Clare Shops, South side of Pratt Street between Carey & Poppleton Streets, Baltimore, Independent City, MD

  5. Partial Trisomy of Chromosome 11: A Case Report

    ERIC Educational Resources Information Center

    Falk Rena E.; And Others

    1973-01-01

    A case of partial trisomy of the short arms of chromosome number 11 resulting in profound retardation and multiple physical defects was confirmed by means of fluorescent karyotyping of the chromosomally balanced carrier father. (Author)

  6. Partial Oxidized Arsenene: Emerging Tunable Direct Bandgap Semiconductor

    NASA Astrophysics Data System (ADS)

    Wang, Yu-Jiao; Zhou, Kai-Ge; Yu, Geliang; Zhong, Xing; Zhang, Hao-Li

    2016-04-01

    Arsenene, as a member of the Group V elemental two-dimensional materials appears on the horizon, has shown great prospects. However, its indirect bandgap limits the applications in optoelectronics. In this theoretical work, we reported that partial oxidation can tune the indirect bandgap of arsenene into the direct one. Attributed to the enthalpy decreasing linear to the oxygen ratio, partial oxidized arsenene can be controllably produced by the progressive oxidation under low temperature. Importantly, by increasing the oxygen content from 1O/18As to 18O/18As, the oxidation can narrow the direct bandgap of oxidized arsenene from 1.29 to 0.02 eV. The bandgap of partial oxidized arsenene is proportional to the oxygen content. Consequently, the partial oxidized arsenene with tunable direct bandgap has great potentials in the high efficient infra light emitter and photo-voltaic devices.

  7. 3. Partial view of SE sides of Boiler Building (left), ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Partial view of SE sides of Boiler Building (left), Incineration Building (to right of stack) and Machine Shop (right). - Pacific Creosoting Plant, Boiler Building, 5350 Creosote Place, Northeast, Bremerton, Kitsap County, WA

  8. Partial view of the northeast side, taken from Facility No. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Partial view of the northeast side, taken from Facility No. 6 - U.S. Naval Base, Pearl Harbor, Flask Storage, West side of Seventh Street between Facility Nos. 1107 & S1115, Pearl City, Honolulu County, HI

  9. Numerical method for computing flow through partially saturated porous media

    SciTech Connect

    Eaton, R.R.

    1983-01-01

    This paper discusses the development of the finite element computer code SAGUARO which calculates the two-dimensional flow of mass and energy through porous media. The media may be saturated or partially saturated. SAGUARO solves the parabolic time-dependent mass transport equation which accounts for the presence of partially saturated zones through the use of highly non-linear material characteristic curves. The energy equation accounts for the possibility of partially-saturated regions by adjusting the thermal capacitances and thermal conductivities according to the volume fraction of water present in the local pores. The code capabilities are demonstrated through the presentation of a sample problem involving the one-dimensional calculation of simultaneous energy transfer and water infiltration into partially saturated hard rock.

  10. Numerical method for computing flow through partially saturated porous media

    NASA Astrophysics Data System (ADS)

    Eaton, R. R.

    This paper discusses the development of the finite element computer code SAGUARO which calculates the two-dimensional flow of mass and energy through porous media. The media may be saturated or partially saturated. SAGUARO solves the parabolic time-dependent mass transport equation which accounts for the presence of partially saturated zones through the use of highly non-linear material characteristic curves. The energy equation accounts for the possibility of partially-saturated regions by adjusting the thermal capacitances and thermal conductivities according to the volume fraction of water present in the local pores. The code capabilities are demonstrated through the presentation of a sample problem involving the one dimensional calculation of simultaneous energy transfer and water infiltration into partially saturated hard rock.

  11. 33. VIEW LOOKING NORTHNORTHWEST AT THE DENNIS HOTEL (PARTIAL VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. VIEW LOOKING NORTH-NORTHWEST AT THE DENNIS HOTEL (PARTIAL VIEW OF THE BLENHEIM HOTEL) - Marlborough, Blenheim & Dennis Hotels (aerial views), Between Park Place, Michigan Avenue & Boardwalk, Atlantic City, Atlantic County, NJ

  12. Partial information transmission can be found in music attributes.

    PubMed

    Lu, Jing; Li, Gujing; Gong, Diankun; Hu, Qingqing

    2014-02-12

    Previous studies have proved that partial information transmission can be found between intensity and pitch. In our last study, it was demonstrated that the timbre attribute can be transmitted as partial information between timbre and intensity. We manipulated the two attributes of stimulus, namely, timbre (piano vs. violin) and pitch (high vs. low), to find out whether they also have partial information transmission. We used the two-choice 'go/no-go' paradigm, which included more 'go' trials of timbre. Our result showed that lateralized readiness potentials were elicited in 'no-go' trials, which meant that the timbre attribute had been transmitted to the response preparation stage before the intensity attribute was processed in the stimuli identification stage. This result supports the asynchronous discrete coding model in information processing. Therefore, we suggest that partial information transmission can be found in music attributes including timbre, intensity, and pitch.

  13. 9. Partial elevation of west side showing pillar, central and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Partial elevation of west side showing pillar, central and southern sections, from San Antonio Highway Bridge. - Puente Ferroviario San Antonio, Spanning San Antonio Channel at PR-1, San Juan, San Juan Municipio, PR

  14. 3. Partial elevation: west side of north end, from the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Partial elevation: west side of north end, from the San Antonio Railroad Bridge - Puente Guillermo Esteves, Spanning San Antonio Channel at PR-25 (Juan Ponce de Leon Avenue), San Juan, San Juan Municipio, PR

  15. 4. Partial elevation: west side of south end, from the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Partial elevation: west side of south end, from the San Antonio Railroad Bridge - Puente Guillermo Esteves, Spanning San Antonio Channel at PR-25 (Juan Ponce de Leon Avenue), San Juan, San Juan Municipio, PR

  16. 7. PARTIAL ELEVATION, FROM SOUTHEAST, SHOWING STRUCTURAL CONFIGURATION, INCLUDING DOUBLESPAN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. PARTIAL ELEVATION, FROM SOUTHEAST, SHOWING STRUCTURAL CONFIGURATION, INCLUDING DOUBLE-SPAN REINFORCED CONCRETE RIGID FRAME AS BASIC STRUCTURAL UNIT OF BRIDGE - Fifth Street Viaduct, Spanning Bacon's Quarter Branch Valley on Fifth Street, Richmond, Independent City, VA

  17. Physics analysis of the gang partial rod drive event

    SciTech Connect

    Boman, C.; Frost, R.L.

    1992-08-01

    During the routine positioning of partial-length control rods in Gang 3 on the afternoon of Monday, July 27, 1992, the partial-length rods continued to drive into the reactor even after the operator released the controlling toggle switch. In response to this occurrence, the Safety Analysis and Engineering Services Group (SAEG) requested that the Applied Physics Group (APG) analyze the gang partial rod drive event. Although similar accident scenarios were considered in analysis for Chapter 15 of the Safety Analysis Report (SAR), APG and SAEG conferred and agreed that this particular type of gang partial-length rod motion event was not included in the SAR. This report details this analysis.

  18. Partial information transmission can be found in music attributes.

    PubMed

    Lu, Jing; Li, Gujing; Gong, Diankun; Hu, Qingqing

    2014-02-12

    Previous studies have proved that partial information transmission can be found between intensity and pitch. In our last study, it was demonstrated that the timbre attribute can be transmitted as partial information between timbre and intensity. We manipulated the two attributes of stimulus, namely, timbre (piano vs. violin) and pitch (high vs. low), to find out whether they also have partial information transmission. We used the two-choice 'go/no-go' paradigm, which included more 'go' trials of timbre. Our result showed that lateralized readiness potentials were elicited in 'no-go' trials, which meant that the timbre attribute had been transmitted to the response preparation stage before the intensity attribute was processed in the stimuli identification stage. This result supports the asynchronous discrete coding model in information processing. Therefore, we suggest that partial information transmission can be found in music attributes including timbre, intensity, and pitch. PMID:24323126

  19. VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST (without scale stick). - Naval Computer & Telecommunications Area Master Station, Eastern Pacific, Radio Transmitter Facility Lualualei, Marine Barracks, Intersection of Tower Drive & Morse Street, Makaha, Honolulu County, HI

  20. VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST (with scale stick) - Naval Computer & Telecommunications Area Master Station, Eastern Pacific, Radio Transmitter Facility Lualualei, Marine Barracks, Intersection of Tower Drive & Morse Street, Makaha, Honolulu County, HI