Comparison of different focusing fiber tips for improved oral diode laser surgery.

PubMed

Stock, Karl; Stegmayer, Thomas; Graser, Rainer; Förster, Wolfram; Hibst, Raimund

2012-12-01

State of the art for use of the fiber guided diode laser in dental therapy is the application of bare fibers. A novel concept with delivery fiber and exchangeable fiber tips enables the use of tips with special and optimized geometries for various applications. The aim of this study is the comparison of different focusing fiber tips for enhanced cutting efficacy in oral surgery. For this purpose various designs of tip geometry were investigated and optimized by ray tracing simulations. Two applicators, one with a sphere, and another one with a taper, were realized and tested on porcine gingiva (diode laser, 940 nm, 5 W/cw; 7 W/modulated). The cutting depth and quality were determined by light microscope. Histological sections of the cuts were prepared by a cryo-microtome and microscopically analyzed to determine the cut depths and thermal damage zones. The simulations show that, using a sphere as fiber tip, an intensity increase of up to a factor of 16.2 in air, and 13.2 in water compared to a bare 200 µm fiber can be achieved. Although offering high focusing factor in water, the cutting quality of the sphere was rather poor. This is probably caused by a derogation of the focusing quality due to contamination during cutting and light scattering. Much better results were achieved with conically shaped fiber tips. Compared to bare fibers they exhibit improved handling properties with no hooking, more regular and deeper cuts (5 W/cw: 2,393 ± 468 µm, compared to the cleaved bare fiber 5 W/cw: 711 ± 268 µm). The thermal damage zones of the cuts are comparable for the various tips and fibers. In conclusion the results of our study show that cutting quality and efficiency of diode laser on soft tissue can be significantly improved using conically shaped fiber tips. Copyright © 2012 Wiley Periodicals, Inc.

Fast Food: Tips for Choosing Healthier Options

MedlinePlus

... meal choices when going to a fast-food restaurant. By Mayo Clinic Staff Does following a weight- ... order. Consider these tips. If the fast-food restaurant offers several sandwich sizes, pick the smallest. Bypass ...

29 CFR 531.56 - “More than $30 a month in tips.”

Code of Federal Regulations, 2011 CFR

2011-07-01

... whom the wage credit provided by section 3(m) may be taken in computing the compensation due him under... any deduction for tips received under the provisions of section 3(m). (b) Month. The definition of... for tips is determined under section 3(m). It does not govern or limit the determination of the...

Turbine blade squealer tip rail with fence members

DOE Office of Scientific and Technical Information (OSTI.GOV)

Little, David A

2012-11-20

A turbine blade includes an airfoil, a blade tip section, a squealer tip rail, and a plurality of chordally spaced fence members. The blade tip section includes a blade tip floor located at an end of the airfoil distal from the root. The blade tip floor includes a pressure side and a suction side joined together at chordally spaced apart leading and trailing edges of the airfoil. The squealer tip rail extends radially outwardly from the blade tip floor adjacent to the suction side and extends from a first location adjacent to the airfoil trailing edge to a second locationmore » adjacent to the airfoil leading edge. The fence members are located between the airfoil leading and trailing edges and extend radially outwardly from the blade tip floor and axially from the squealer tip rail toward the pressure side.« less

Writing for Profit: A Catalog of Hints.

ERIC Educational Resources Information Center

Barnum, Carol M.

1981-01-01

Offers tips to business communication teachers on how to write for money. Tips include: (1) Begin by writing for free, (2) use business contacts, (3) vary approaches to writing, and (4) write about personal experiences. (FL)

Tips for Teens with Diabetes: About Diabetes

ERIC Educational Resources Information Center

National Diabetes Education Program (NDEP), 2010

2010-01-01

Diabetes is a serious disease. It means that one's blood glucose, also called blood sugar, is too high. Having too much glucose in a person's blood is not healthy. This paper offers tips for managing diabetes.

Try These Time Management Tips.

ERIC Educational Resources Information Center

Bimrose, Jack J.

1987-01-01

Offers 12 time management tips for harried school administrators, including using a personal calendar, calling five-minute meetings with secretaries, mail-sorting, delegating or declining certain tasks, controlling visitors, screening phone calls, streamlining meetings, and other ideas. (MLH)

Add Sparkle to Your Learning Centers

ERIC Educational Resources Information Center

Miller, Susan

2005-01-01

This brief column offers ten tips on how to revive classroom learning centers by cleaning up, reassessing spaces, and adding fresh materials. Some of the tips include: create colorful banners; provide inspirational materials; and share surprise boxes.

Tips for a physician in getting the right job, Part XXI: introduction to contract negotiations.

PubMed

Harolds, Jay A

2015-04-01

Those physicians who have excellent job prospects, and preferably have more than one offer, may wish to try to negotiate better terms for their employment contract than was initially offered. However, any negotiation must be done in a friendly, polite, and professional manner. This article gives many tips regarding contract negotiations. However, the employment contract should be discussed with the job seeker's family and attorney before signing it.

Large-Scale Fabrication of Carbon Nanotube Probe Tips For Atomic Force Microscopy Critical Dimension Imaging Applications

NASA Technical Reports Server (NTRS)

Ye, Qi Laura; Cassell, Alan M.; Stevens, Ramsey M.; Meyyappan, Meyya; Li, Jun; Han, Jie; Liu, Hongbing; Chao, Gordon

2004-01-01

Carbon nanotube (CNT) probe tips for atomic force microscopy (AFM) offer several advantages over Si/Si3N4 probe tips, including improved resolution, shape, and mechanical properties. This viewgraph presentation discusses these advantages, and the drawbacks of existing methods for fabricating CNT probe tips for AFM. The presentation introduces a bottom up wafer scale fabrication method for CNT probe tips which integrates catalyst nanopatterning and nanomaterials synthesis with traditional silicon cantilever microfabrication technology. This method makes mass production of CNT AFM probe tips feasible, and can be applied to the fabrication of other nanodevices with CNT elements.

High-Tip-Speed, Low-Loading Transonic Fan Stage. Part 1: Aerodynamic and Mechanical Design

NASA Technical Reports Server (NTRS)

Wright, L. C.; Vitale, N. G.; Ware, T. C.; Erwin, J. R.

1973-01-01

A high-tip-speed, low-loading transonic fan stage was designed to deliver an overall pressure ratio of 1.5 with an adiabatic efficiency of 86 percent. The design flow per unit annulus area is 42.0 pounds per square foot. The fan features a hub/tip ratio of 0.46, a tip diameter of 28.74 in. and operates at a design tip speed of 1600 fps. For these design conditions, the rotor blade tip region operates with supersonic inlet and supersonic discharge relative velocities. A sophisticated quasi-three-dimensional characteristic section design procedure was used for the all-supersonic sections and the inlet of the midspan transonic sections. For regions where the relative outlet velocities are supersonic, the blade operates with weak oblique shocks only.

Fabrication of silver tips for scanning tunneling microscope induced luminescence.

PubMed

Zhang, C; Gao, B; Chen, L G; Meng, Q S; Yang, H; Zhang, R; Tao, X; Gao, H Y; Liao, Y; Dong, Z C

2011-08-01

We describe a reliable fabrication procedure of silver tips for scanning tunneling microscope (STM) induced luminescence experiments. The tip was first etched electrochemically to yield a sharp cone shape using selected electrolyte solutions and then sputter cleaned in ultrahigh vacuum to remove surface oxidation. The tip status, in particular the tip induced plasmon mode and its emission intensity, can be further tuned through field emission and voltage pulse. The quality of silver tips thus fabricated not only offers atomically resolved STM imaging, but more importantly, also allows us to perform challenging "color" photon mapping with emission spectra taken at each pixel simultaneously during the STM scan under relatively small tunnel currents and relatively short exposure time.

Molecular tips for scanning tunneling microscopy: intermolecular electron tunneling for single-molecule recognition and electronics.

PubMed

Nishino, Tomoaki

2014-01-01

This paper reviews the development of molecular tips for scanning tunneling microscopy (STM). Molecular tips offer many advantages: first is their ability to perform chemically selective imaging because of chemical interactions between the sample and the molecular tip, thus improving a major drawback of conventional STM. Rational design of the molecular tip allows sophisticated chemical recognition; e.g., chiral recognition and selective visualization of atomic defects in carbon nanotubes. Another advantage is that they provide a unique method to quantify electron transfer between single molecules. Understanding such electron transfer is mandatory for the realization of molecular electronics.

Tip Saves Energy, Money for Pennsylvania Plant

EPA Pesticide Factsheets

A wastewater treatment plant in Berks County, Pennsylvania is saving nearly $45,000 a year and reducing hundreds of metric tons of greenhouse gases since employing an energy conservation tip offered by the Water Protection Division in EPA’s R3 and PADEP.

Marketing Your Camp to Diverse Populations: Tips To Reach Ethnic Markets.

ERIC Educational Resources Information Center

Nicodemus, Teresa

2000-01-01

Cultural differences enhance the wonder of camp. Tips for reaching diverse populations include emphasizing multicultural programming in promotional materials, distributing flyers in diverse neighborhoods, having diverse staff, advertising on radio stations popular with ethnic communities, offering scholarships, advertising through national ethnic…

26 CFR 31.3102-3 - Collection of, and liability for, employee tax on tips.

Code of Federal Regulations, 2010 CFR

2010-04-01

..., an amount equal to wages as defined in section 3121(a) except that tips and noncash remuneration... section 3401(a) (exclusive of tips); and (iii) The amount of taxes imposed on the remuneration of an... amounts deducted from an employee's remuneration in excess of the correct amount of employee tax, see § 31...

Fast food tips (image)

MedlinePlus

... at places that offer a variety of salads, soups, and vegetables to help maintain your best health. ... at places that offer a variety of salads, soups, and vegetables to help maintain your best health.

101 Ways To Build Enrollment in Your Early Childhood Program.

ERIC Educational Resources Information Center

Montanari, Ellen Orton

Written for administrators of early childhood program centers, this book offers tips on how to increase enrollment. The book offers suggestions rather than a theoretical overview or a comprehensive marketing strategy. Suggestions offered include: (1) Offer a quality program; (2) be aware of your target market; (3) make your program unique; (4)…

Fiber-optic laser Doppler turbine tip clearance probe

NASA Astrophysics Data System (ADS)

Büttner, Lars; Pfister, Thorsten; Czarske, Jürgen

2006-05-01

A laser Doppler based method for in situ single blade tip clearance measurements of turbomachines with high precision is presented for what we believe is the first time. The sensor is based on two superposed fanlike interference fringe systems generated by two laser wavelengths from a fiber-coupled, passive, and therefore compact measurement head employing diffractive optics. Tip clearance measurements at a transonic centrifugal compressor performed during operation at 50,000 rpm (833 Hz, 586 m/s tip speed) are reported. At these speeds the measured uncertainty of the tip position was less than 20 μm, a factor of 2 more accurate than that of capacitive probes. The sensor offers great potential for in situ and online high-precision tip clearance measurements of metallic and nonmetallic turbine blades.

Fiber-optic laser Doppler turbine tip clearance probe.

PubMed

Büttner, Lars; Pfister, Thorsten; Czarske, Jürgen

2006-05-01

A laser Doppler based method for in situ single blade tip clearance measurements of turbomachines with high precision is presented for what we believe is the first time. The sensor is based on two superposed fanlike interference fringe systems generated by two laser wavelengths from a fiber-coupled, passive, and therefore compact measurement head employing diffractive optics. Tip clearance measurements at a transonic centrifugal compressor performed during operation at 50,000 rpm (833 Hz, 586 m/s tip speed) are reported. At these speeds the measured uncertainty of the tip position was less than 20 microm, a factor of 2 more accurate than that of capacitive probes. The sensor offers great potential for in situ and online high-precision tip clearance measurements of metallic and nonmetallic turbine blades.

Tips on Car Care & Safety for Deaf Drivers.

ERIC Educational Resources Information Center

National Highway Traffic Safety Administration (DOT), Washington, DC.

Primarily intended for the deaf or hard of hearing driver, this booklet contains many tips useful to all drivers. It is divided into two sections: Signs of Car Trouble and What to Do, and Safe Driving Tips and Special Situations. The rationale for section 1 is that a hearing driver can often tell that his car is not running properly or that some…

Doesn't He Have Beautiful Blue Eyes? Tips for a Successful Parent-Teacher Conference.

ERIC Educational Resources Information Center

Strudler, Ruth

1993-01-01

Tips for successful parent-teacher conferences concerning children with special needs focus on preventing a conflict cycle and developing a cooperation cycle. Specific suggestions to reduce stress levels and involve parents positively are offered for preconference behaviors, conference behaviors, and postconference behaviors. (DB)

75 FR 17375 - Submission for OMB Review; Comment Request

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-06

... submit to the Office of Management and Budget (OMB) for clearance the following proposal for collection... Papers to the Technology Innovation Program (TIP). OMB Control Number: None. Form Number(s): None. Type... develop new areas for future competitions for the Technology Innovation Program (TIP) by offering ideas in...

Staff Training Tips: Focusing on Early Childhood Education and Services.

ERIC Educational Resources Information Center

2003

This document collects 15 brief guides to staff training in inclusive early childhood education settings. Guides offer examples of successful programs, research findings, and practical tips. Titles are: (1) "Giving Families Better Access to Early Intervention Services"; (2) "Creating Integrated Classrooms that Work"; (3) "Seamless Transition…

An in vitro method for rapid regeneration of a monopodial orchid hybrid Aranda Deborah using thin section culture.

PubMed

Lakshmanan, P; Loh, C S; Goh, C J

1995-05-01

A thin section culture system for rapid regeneration of the monopodial orchid hybrid Aranda Deborah has been developed. Thin sections (0.6-0.7mm thick) obtained by transverse sectioning of a single shoot tip (6-7mm), when cultured in Vacin and Went medium enriched with coconut water (20% v/v), produced an average 13.6 protocorm-like bodies (PLB) after 45 days, compared to 2.7 PLB formed by a single 6-7 mm long shoot tip under same culture condition. Addition of α-naphthaleneacetic acid to Vacin and Went medium enriched with coconut water further increased PLB production by thin sections. PLB developed into plantlets on solid Vacin and Went medium containing 10% (v/v) coconut water and 0.5 g l(-1) activated charcoal. With this procedure, more than 80,000 plantlets could be produced from thin sections obtained from a single shoot tip in a year as compared to nearly 11,000 plantlets produced by the conventional shoot tip method.

Turbine airfoil having outboard and inboard sections

DOEpatents

Mazzola, Stefan; Marra, John J

2015-03-17

A turbine airfoil usable in a turbine engine and formed from at least an outboard section and an inboard section such that an inner end of the outboard section is attached to an outer end of the inboard section. The outboard section may be configured to provide a tip having adequate thickness and may extend radially inward from the tip with a generally constant cross-sectional area. The inboard section may be configured with a tapered cross-sectional area to support the outboard section.

Illinois Early Learning Project Tip Sheets: Parenting and Family Life.

ERIC Educational Resources Information Center

2003

The Illinois Early Learning Project (IEL) is funded by the Illinois State Board of Education to provide information resources on early learning and training related to implementing the Illinois Early Learning Standards for parents and for early childhood personnel in all settings. The IEL tip sheets offer suggestions to parents and early childhood…

Tips to Making Successful School Board Presentations

ERIC Educational Resources Information Center

Cheasty, Michelle

2011-01-01

Over the years, the author has had the opportunity to make several presentations to school boards. The author offers some tips and tricks she has learned, having given board presentations about the specific topics she listed in this article, and receiving feedback after each presentation. She points out that the most important thing to keep in…

Portfolio Preparation Tips for Teachers, Part 2

ERIC Educational Resources Information Center

Hunter-Lombardi, Brooke

2009-01-01

In the August/September 2008 issue of "SchoolArts," the author talked about strategies for helping students develop content and good working habits to support making portfolio-quality pieces. In this article, she offers some tips which focus on the importance of critique, presentation, and selection of images to end up with a polished,…

Illinois Early Learning Project Tip Sheets: Physical Development and Health.

ERIC Educational Resources Information Center

2003

The Illinois Early Learning Project (IEL) is funded by the Illinois State Board of Education to provide information resources on early learning and training related to implementing the Illinois Early Learning Standards for parents and for early childhood personnel in all settings. The IEL tip sheets offer suggestions to parents and early childhood…

Controlling the Climate of Your Schools: Tips On Choosing an HVAC System.

ERIC Educational Resources Information Center

Phelan, John G.

1998-01-01

Provides tips on choosing a school heating/ventilation and air-conditioning system that meets a school's needs and budget. Discusses how to assess a school's needs and offers suggestions for making the final decision. Data tables are provided that compare various systems, including costs, maintenance, and life expectancy. (GR)

29 CFR 516.28 - Tipped employees.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 29 Labor 3 2010-07-01 2010-07-01 false Tipped employees. 516.28 Section 516.28 Labor Regulations... EMPLOYERS Records Pertaining to Employees Subject to Miscellaneous Exemptions Under the Act; Other Special Requirements § 516.28 Tipped employees. (a) With respect to each tipped employee whose wages are determined...

An acoustical guidance and position monitoring system for endotracheal tubes.

PubMed

Mansfield, J P; Lyle, R P; Voorhees, W D; Wodicka, G R

1993-12-01

A prototype instrument to guide the placement and continuously monitor the position of an endotracheal tube (ETT) was developed. An incident audible sound pulse is introduced into the proximal ETT and detected as it travels down the ETT via a miniature microphone located in the wall. This pulse is then emitted from the tube tip into the airways and the reflected signal from the airways is detected by the microphone. A well defined reflection arises from the point where the total cross sectional area of the airways increases rapidly, and the difference in timing between detection of the incident pulse and this reflection is used to determine ETT position or movement. This reflection is not observed if the ETT is erroneously placed in the esophagus. The amplitude and polarity of an additional reflection that occurs at the ETT tip is used to estimate the cross-sectional area of the airway in which the ETT is placed. This combined information allows discrimination between tracheal and bronchial intubation and can be used to insure an adequate fit between the ETT and trachea. The instrument has proven extremely reliable in multiple intubations in eight canines and offers the potential to noninvasively and inexpensively monitor ETT position in a continuous manner.

Performance and Vibratory Loads Data From a Wind-Tunnel Test of a Model Helicopter Main-Rotor Blade With a Paddle-Type Tip

NASA Technical Reports Server (NTRS)

Yeager, William T., Jr.; Noonan, Kevin W.; Singleton, Jeffrey D.; Wilbur, Matthew L.; Mirick, Paul H.

1997-01-01

An investigation was conducted in the Langley Transonic Dynamics Tunnel to obtain data to permit evaluation of paddle-type tip technology for possible use in future U.S. advanced rotor designs. Data was obtained for both a baseline main-rotor blade and a main-rotor blade with a paddle-type tip. The baseline and paddle-type tip blades were compared with regard to rotor performance, oscillatory pitch-link loads, and 4-per-rev vertical fixed-system loads. Data was obtained in hover and forward flight over a nominal range of advance ratios from 0.15 to 0.425. Results indicate that the paddle-type tip offers no performance improvements in either hover or forward flight. Pitch-link oscillatory loads for the paddle-type tip are higher than for the baseline blade, whereas 4-per-rev vertical fixed-system loads are generally lower.

The Nitty-Gritty Classroom and Behavior Management Resource: Strategies, Reproducibles, and Tips for Teachers

ERIC Educational Resources Information Center

Tetteris, Belinda Christine

2006-01-01

This book will help teachers better relate to, understand, and love their job by providing a professional resource that contains innovative ideas, visuals, and reproducibles that can be referenced quickly to help make the job easier. This comprehensive resource offers practical teaching techniques, solutions, and tips on: (1) Planning and…

The Nitty-Gritty Classroom and Behavior Management Resource: Strategies, Reproducibles, and Tips for Teachers

ERIC Educational Resources Information Center

Tetteris, Belinda Christine

2006-01-01

This book will help teachers better relate to, understand, and love their job. This is a professional resource that contains innovative ideas, visuals, and reproducibles that can be referenced quickly to help make the job easier. This comprehensive resource offers practical teaching techniques, solutions, and tips on: (1) Planning and designing…

Teaching American History: Structured Inquiry Approaches. SSEC Publication No. 185.

ERIC Educational Resources Information Center

Linden, Glenn M., Ed.; Downey, Matthew T., Ed.

This paper is one of a series of ERIC/ChESS publications intended to give practical tips on teaching various topics and disciplines in the precollege social studies curriculum. The tips offered in this publication, written by seven authors, are intended to help teacheres deal with both content and teaching strategies in American history. Each of…

Teenagers and Sexuality at Camp: Understanding Teen Sexuality and Tips for Talking with Them.

ERIC Educational Resources Information Center

Ponton, Lynn E.

2000-01-01

Camp offers teens a place to try out new things, including sexual experimentation. Two case studies illustrate challenging ways sex can come up at camp, and staff responses. Myths and misconceptions about sex, including HIV and gender roles, are discussed. Sidebars discuss guidelines for adults concerning sexual abuse symptoms and tips for talking…

Tips and Tricks in Outdoor Education. Approaches to Providing Children with Educational Experiences in the Out-of-Doors.

ERIC Educational Resources Information Center

Swan, Malcolm D., Ed.

A revision of the Lorado Taft Field Campus' 1968 "Instructional Materials Packet" on providing children with educational experiences outside the classroom, this book contains materials, tips, worksheets, and plans for offering students an opportunity for supplementary outdoor experiences in a variety of subject-matter areas: animal studies,…

Reading Tips for Parents = Consejos practicos de lectura para los padre.

ERIC Educational Resources Information Center

Department of Education, Washington, DC. Office of Intergovernmental and Interagency Affairs.

This booklet for parents, in both English and Spanish, offers suggestions for helping their young children develop and improve their reading skills. The booklet first presents tips for helping infants or preschoolers be ready to read and ready to learn. Suggestions include talking to the infant or toddler, reading aloud starting at 6 months,…

Trafficking and Health: A Systematic Review of Research Methods.

PubMed

Cannon, Abby C; Arcara, Jennet; Graham, Laurie M; Macy, Rebecca J

2018-04-01

Trafficking in persons (TIP) is a human rights violation with serious public health consequences. Unfortunately, assessing TIP and its health sequelae rigorously and reliably is challenging due to TIP's clandestine nature, variation in definitions of TIP, and the need to use research methods that ensure studies are ethical and feasible. To help guide practice, policy, and research to assess TIP and health, we undertook a systematic literature review of 70 peer-reviewed, published articles to (a) identify TIP and health research methods being used, (b) determine what we can learn about TIP and health from these varied methodologies, and (c) determine the gaps that exist in health-focused TIP research. Results revealed that there are various quantitative and qualitative data collection and analysis methods being used to investigate TIP and health. Furthermore, findings show that the limitations of current methodologies affect what is known about TIP and health. In particular, varying definitions, participant recruitment strategies, ethical standards, and outcome measures all affect what is known about TIP and health. Moreover, findings demonstrate an urgent need for representative and nonpurposive recruitment strategies in future investigations of TIP and health as well as research on risk and protective factors related to TIP and health, intervention effectiveness, long-term health outcomes, and research on trafficked people beyond women trafficked for sex. We offer recommendations for research, policy, and practice based on review results.

Investigation on tip enhanced Raman spectra of graphene

NASA Astrophysics Data System (ADS)

Li, Xinjuan; Liu, Yanqi; Zeng, Zhuo; Wang, Peijie; Fang, Yan; Zhang, Lisheng

2018-02-01

Tip-enhanced Raman scattering (TERS) is a promising analytical approach for some two-dimensional materials and offers the possibility to correlate imaging and chemical data. Tip-enhanced Raman spectra of graphene are discussed in some details, including substrate, gap between tip-apex and sample surface as well as Ag-nanowire. The TERS spectra give special emphasis to the possibility of TERS tip to induce a large number of defects only while got the tip attached to sample surface. Then the dependence of the TERS spectra of graphene and gap between the probe tip and sample surface was studied, and distribution features of electromagnetic (EM) field around tip were also simulated by finite-difference time-domain (FDTD). The Raman signal enhancement of graphene was further discussed with respect to experimental data. Furthermore, the Ag-nanowire as a nano-antenna could significantly enhance the weak Raman signal of D-band of monolayer graphene is shown, and the TERS spectra of graphene with regard to different regions of Ag-nanowires (endpoints, body) were obtained toward investigating into the distribution of electromagnetic field.

Selected advanced aerodynamics and active controls technology concepts development on a derivative B-747 aircraft

NASA Technical Reports Server (NTRS)

1983-01-01

Analytical design and wind tunnel test evaluations covering the feasibility of applying wing tip extensions, winglets, and active control wing had alleviation to the model B747 are described. Aerodynamic improvement offered by wing tip extension and winglet individually, and the combined aerodynamic and weight improvements when wing load alleviation is combined with the tip extension or the winglet are evaluated. Results are presented in the form of incremental effects on weight mission range, fuel usage, cost, and airline operating economics.

Twelve tips for delivering successful interprofessional case conferences.

PubMed

O'Brien, Bridget C; Patel, Shalini R; Pearson, Meg; Eastburn, Abigail P; Earnest, Gillian E; Strewler, Anna; Gager, Krista; Manuel, Jennifer K; Dulay, Maya; Bachhuber, Melissa R; Shunk, Rebecca

2017-12-01

Interprofessional case conferences (ICCs) offer an interactive, practical way to engage members of two or more health professions in discussions that involve learning and working together to improve patient care. Well-orchestrated ICCs provide opportunities to integrate interprofessional (IP) education into routine clinical practice. The authors provide 12 tips to support the conceptualization, planning, implementation, facilitation, evaluation, and sustainability of ICCs. They draw from extensive experience as IP educators and facilitators of ICCs and from literature on IP education, case-based learning, small-group facilitation, peer-assisted learning, and learner engagement - all of which offer insights into ICCs but have not been integrated and applied to this context.

Biophysical Characterization of the Type III Secretion Tip Proteins and the Tip Proteins Attached to Bacterium-Like Particles

PubMed Central

Choudhari, Shyamal P.; Chen, Xiaotong; Kim, Jae Hyun; van Roosmalen, Maarten L.; Greenwood, Jamie C.; Joshi, Sangeeta B.; Picking, William D.; Leenhouts, Kees; Middaugh, C. Russell; Picking, Wendy L.

2014-01-01

Bacterium-like particles (BLPs), derived from Lactococcus lactis, offer a self-adjuvanting delivery vehicle for subunit protein vaccines. Proteins can be specifically loaded onto the BLPs via a peptidoglycan anchoring domain (PA). In this study, the tip proteins IpaD, SipD and LcrV belonging to type three secretion systems of Shigella flexneri, Salmonella enterica and Yersinia enterocolitica, respectively, were fused to the PA and loaded onto the BLPs. Herein, we biophysically characterized these nine samples and condensed the spectroscopic results into three-index empirical phase diagrams (EPDs). The EPDs show distinctions between the IpaD/SipD and LcrV subfamilies of tip proteins, based on their physical stability, even upon addition of the PA. Upon attachment to the BLPs, the BLPs become defining moiety in the spectroscopic measurements, leaving the tip proteins to have a subtle yet modulating effect on the structural integrity of the tip proteins-BLPs binding. In summary, this work provides a comprehensive view of physical stability of the tip proteins and tip protein-BLPs and serves as a baseline for screening of excipients to increase the stability of the tip protein-BLPs for future vaccine formulation. PMID:24916512

The Fungus among Us.

ERIC Educational Resources Information Center

Weidner, Robert H.

2003-01-01

Offers tips for fighting mold in schools, asserting that it can contribute significantly to poor indoor air quality and sick building syndrome. Offers an overview on mold and discusses the steps of: humidity control, building inspections, condensation control or removal, and floor and carpet cleaning. (EV)

Reflection plane tests of a wind turbine blade tip section with ailerons

NASA Technical Reports Server (NTRS)

Savino, J. M.; Nyland, T. W.; Birchenough, A. G.; Jordan, F. L.; Campbell, N. K.

1985-01-01

Tests were conducted in the NASA Langley 30 by 60 foot Wind Tunnel on a full scale 7.31 m (24 ft) long tip section of a wind turbine rotor blade. The blade tip section was built with ailerons on the trailing edge. The ailerons, which spanned a length of 6.1 m (20 ft), were designed so that two types could be evaluated: the plain and the balanced. The ailerons were hinged on the suction surface at the 0.62 X chord station behind the leading edge. The purpose of the tests was to measure the aerodynamic characteristics of the blade section for: an angle of attack range from 0 deg to 90 deg aileron deflections from 0 deg to -90 deg, and Reynolds numbers of 0.79 and 1.5 x 10 to the 6th power. These data were then used to determine which aileron configuration had the most desirable rotor control and aerodynamic braking characteristics. Tests were also run to determine the effects of vortex generators, leading edge roughness, and the gaps between the aileron sections on the lift, drag, and chordwise force coefficients of the blade tip section.

Removable inner turbine shell with bucket tip clearance control

DOEpatents

Sexton, Brendan F.; Knuijt, Hans M.; Eldrid, Sacheverel Q.; Myers, Albert; Coneybeer, Kyle E.; Johnson, David Martin; Kellock, Iain R.

2000-01-01

A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.

An investigation of tip planform influence on the aerodynamic load characteristics of semispan, upswept wing and wing-tip

NASA Technical Reports Server (NTRS)

Vanaken, Johannes M.

1986-01-01

A semi-span wing, equipped with an interchangeable tip, which was varied in planform and size was examined. Total wing aerodynamic loading was obtained from the wind tunnel scale system. The wing tip was mounted on a separate six-component strain gauge balance, which provided the aerodynamic loads on the tip. The tests were accomplished in the NASA Ames 7X10-Foot Wind Tunnel at a Mach number of 0.178. The aerodynamic load characteristics of the wing and of the tip were presented with the tip at several incidence angles relative to the wing inboard section.

Multitip scanning bio-Kelvin probe

NASA Astrophysics Data System (ADS)

Baikie, I. D.; Smith, P. J. S.; Porterfield, D. M.; Estrup, P. J.

1999-03-01

We have developed a novel multitip scanning Kelvin probe which can measure changes in biological surface potential ΔVs to within 2 mV and, quasisimultaneously monitor displacement to <1 μm. The control and measurement subcomponents are PC based and incorporate a flexible user interface permitting software control of each individual tip, measurement, and scan parameters. We review the mode of operation and design features of the scanning bio-Kelvin probe including tip steering, signal processing, tip calibration, and novel tip tracking/dithering routines. This system uniquely offers both tip-to-sample spacing control (which is essential to avoid spurious changes in ΔVs due to variations in mean spacing) and a dithering routine to maintain tip orientation to the biological specimen, irrespective of the latter's movement. These features permit long term (>48 h) "active" tracking of the displacement and biopotentials developed along and around a plant shoot in response to an environmental stimulus, e.g., differential illumination (phototropism) or changes in orientation (gravitropism).

Tips for Kids: Lower Your Risk for Type 2 Diabetes

ERIC Educational Resources Information Center

US Department of Health and Human Services, 2005

2005-01-01

Today, more kids have type 2 diabetes than ever before. This colorful, easy-to-read tip sheet encourages young people to take steps to lower their risk for type 2 diabetes. A list of warning signs and a healthy eating guide is offered, along with a list of websites to learn more. [This brochure was prepared by the Department of Health and Human…

21 CFR 870.1370 - Catheter tip occluder.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Catheter tip occluder. 870.1370 Section 870.1370 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1370 Catheter tip occluder...

21 CFR 870.1370 - Catheter tip occluder.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Catheter tip occluder. 870.1370 Section 870.1370 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1370 Catheter tip occluder...

21 CFR 870.2870 - Catheter tip pressure transducer.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Catheter tip pressure transducer. 870.2870 Section 870.2870 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Monitoring Devices § 870.2870 Catheter tip...

Eleven quick tips for architecting biomedical informatics workflows with cloud computing.

PubMed

Cole, Brian S; Moore, Jason H

2018-03-01

Cloud computing has revolutionized the development and operations of hardware and software across diverse technological arenas, yet academic biomedical research has lagged behind despite the numerous and weighty advantages that cloud computing offers. Biomedical researchers who embrace cloud computing can reap rewards in cost reduction, decreased development and maintenance workload, increased reproducibility, ease of sharing data and software, enhanced security, horizontal and vertical scalability, high availability, a thriving technology partner ecosystem, and much more. Despite these advantages that cloud-based workflows offer, the majority of scientific software developed in academia does not utilize cloud computing and must be migrated to the cloud by the user. In this article, we present 11 quick tips for architecting biomedical informatics workflows on compute clouds, distilling knowledge gained from experience developing, operating, maintaining, and distributing software and virtualized appliances on the world's largest cloud. Researchers who follow these tips stand to benefit immediately by migrating their workflows to cloud computing and embracing the paradigm of abstraction.

Eleven quick tips for architecting biomedical informatics workflows with cloud computing

PubMed Central

Moore, Jason H.

2018-01-01

Cloud computing has revolutionized the development and operations of hardware and software across diverse technological arenas, yet academic biomedical research has lagged behind despite the numerous and weighty advantages that cloud computing offers. Biomedical researchers who embrace cloud computing can reap rewards in cost reduction, decreased development and maintenance workload, increased reproducibility, ease of sharing data and software, enhanced security, horizontal and vertical scalability, high availability, a thriving technology partner ecosystem, and much more. Despite these advantages that cloud-based workflows offer, the majority of scientific software developed in academia does not utilize cloud computing and must be migrated to the cloud by the user. In this article, we present 11 quick tips for architecting biomedical informatics workflows on compute clouds, distilling knowledge gained from experience developing, operating, maintaining, and distributing software and virtualized appliances on the world’s largest cloud. Researchers who follow these tips stand to benefit immediately by migrating their workflows to cloud computing and embracing the paradigm of abstraction. PMID:29596416

A Blade Tip Timing Method Based on a Microwave Sensor

PubMed Central

Zhang, Jilong; Duan, Fajie; Niu, Guangyue; Jiang, Jiajia; Li, Jie

2017-01-01

Blade tip timing is an effective method for blade vibration measurements in turbomachinery. This method is increasing in popularity because it is non-intrusive and has several advantages over the conventional strain gauge method. Different kinds of sensors have been developed for blade tip timing, including optical, eddy current and capacitance sensors. However, these sensors are unsuitable in environments with contaminants or high temperatures. Microwave sensors offer a promising potential solution to overcome these limitations. In this article, a microwave sensor-based blade tip timing measurement system is proposed. A patch antenna probe is used to transmit and receive the microwave signals. The signal model and process method is analyzed. Zero intermediate frequency structure is employed to maintain timing accuracy and dynamic performance, and the received signal can also be used to measure tip clearance. The timing method uses the rising and falling edges of the signal and an auto-gain control circuit to reduce the effect of tip clearance change. To validate the accuracy of the system, it is compared experimentally with a fiber optic tip timing system. The results show that the microwave tip timing system achieves good accuracy. PMID:28492469

A Blade Tip Timing Method Based on a Microwave Sensor.

PubMed

Zhang, Jilong; Duan, Fajie; Niu, Guangyue; Jiang, Jiajia; Li, Jie

2017-05-11

Blade tip timing is an effective method for blade vibration measurements in turbomachinery. This method is increasing in popularity because it is non-intrusive and has several advantages over the conventional strain gauge method. Different kinds of sensors have been developed for blade tip timing, including optical, eddy current and capacitance sensors. However, these sensors are unsuitable in environments with contaminants or high temperatures. Microwave sensors offer a promising potential solution to overcome these limitations. In this article, a microwave sensor-based blade tip timing measurement system is proposed. A patch antenna probe is used to transmit and receive the microwave signals. The signal model and process method is analyzed. Zero intermediate frequency structure is employed to maintain timing accuracy and dynamic performance, and the received signal can also be used to measure tip clearance. The timing method uses the rising and falling edges of the signal and an auto-gain control circuit to reduce the effect of tip clearance change. To validate the accuracy of the system, it is compared experimentally with a fiber optic tip timing system. The results show that the microwave tip timing system achieves good accuracy.

Creating Poetry.

ERIC Educational Resources Information Center

Drury, John

Encouraging exploration and practice, this book offers hundreds of exercises and numerous tips covering every step involved in creating poetry. Each chapter is a self-contained unit offering an overview of material in the chapter, a definition of terms, and poetry examples from well-known authors designed to supplement the numerous exercises.…

Tip-enhanced Raman mapping with top-illumination AFM.

PubMed

Chan, K L Andrew; Kazarian, Sergei G

2011-04-29

Tip-enhanced Raman mapping is a powerful, emerging technique that offers rich chemical information and high spatial resolution. Currently, most of the successes in tip-enhanced Raman scattering (TERS) measurements are based on the inverted configuration where tips and laser are approaching the sample from opposite sides. This results in the limitation of measurement for transparent samples only. Several approaches have been developed to obtain tip-enhanced Raman mapping in reflection mode, many of which involve certain customisations of the system. We have demonstrated in this work that it is also possible to obtain TERS nano-images using an upright microscope (top-illumination) with a gold-coated Si atomic force microscope (AFM) cantilever without significant modification to the existing integrated AFM/Raman system. A TERS image of a single-walled carbon nanotube has been achieved with a spatial resolution of ∼ 20-50 nm, demonstrating the potential of this technique for studying non-transparent nanoscale materials.

High-loading, 1800 ft/sec tip speed transonic compressor fan stage. 1: Aerodynamic and mechanical design

NASA Technical Reports Server (NTRS)

Morris, A. L.; Halle, J. E.; Kennedy, E. E.

1972-01-01

A single stage fan with a tip speed of 1800 ft/sec (548.6m/sec) and hub/tip ratio of 0.5 was designed to produce a pressure ratio of 2.285:1 with an adiabatic efficiency of 84.0%. The design flow per inlet annulus area is 38.7 lbm/sq ft-sec (188.9KG/sqm-sec). Rotor blades have modified multiple-circular-arc and precompression airfoil sections. The stator vanes have multiple-circular-arc airfoil sections.

21 CFR 870.2870 - Catheter tip pressure transducer.

Code of Federal Regulations, 2012 CFR

2012-04-01

... change in relation to changes in blood pressure. These changes are transmitted to accessory equipment for... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Catheter tip pressure transducer. 870.2870 Section... pressure transducer. (a) Identification. A catheter tip pressure transducer is a device incorporated into...

21 CFR 870.2870 - Catheter tip pressure transducer.

Code of Federal Regulations, 2011 CFR

2011-04-01

... change in relation to changes in blood pressure. These changes are transmitted to accessory equipment for... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Catheter tip pressure transducer. 870.2870 Section... pressure transducer. (a) Identification. A catheter tip pressure transducer is a device incorporated into...

21 CFR 870.2870 - Catheter tip pressure transducer.

Code of Federal Regulations, 2014 CFR

2014-04-01

... change in relation to changes in blood pressure. These changes are transmitted to accessory equipment for... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Catheter tip pressure transducer. 870.2870 Section... pressure transducer. (a) Identification. A catheter tip pressure transducer is a device incorporated into...

21 CFR 870.2870 - Catheter tip pressure transducer.

Code of Federal Regulations, 2013 CFR

2013-04-01

... change in relation to changes in blood pressure. These changes are transmitted to accessory equipment for... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Catheter tip pressure transducer. 870.2870 Section... pressure transducer. (a) Identification. A catheter tip pressure transducer is a device incorporated into...

23 CFR 450.328 - TIP action by the FHWA and the FTA.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 23 Highways 1 2014-04-01 2014-04-01 false TIP action by the FHWA and the FTA. 450.328 Section 450.328 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.328 TIP action...

23 CFR 450.328 - TIP action by the FHWA and the FTA.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 23 Highways 1 2012-04-01 2012-04-01 false TIP action by the FHWA and the FTA. 450.328 Section 450.328 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.328 TIP action...

23 CFR 450.328 - TIP action by the FHWA and the FTA.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 23 Highways 1 2013-04-01 2013-04-01 false TIP action by the FHWA and the FTA. 450.328 Section 450.328 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.328 TIP action...

23 CFR 450.328 - TIP action by the FHWA and the FTA.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 23 Highways 1 2010-04-01 2010-04-01 false TIP action by the FHWA and the FTA. 450.328 Section 450.328 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.328 TIP action...

29 CFR 531.59 - The tip wage credit.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 29 Labor 3 2010-07-01 2010-07-01 false The tip wage credit. 531.59 Section 531.59 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS WAGE PAYMENTS UNDER THE FAIR LABOR STANDARDS ACT OF 1938 Interpretations Payment of Wages to Tipped Employees...

23 CFR 450.328 - TIP action by the FHWA and the FTA.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 23 Highways 1 2011-04-01 2011-04-01 false TIP action by the FHWA and the FTA. 450.328 Section 450.328 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.328 TIP action...

MOOCs: Tips for Enrollment Professionals

ERIC Educational Resources Information Center

Fomin, Elizabeth

2013-01-01

Massive Open Online Courses (MOOCs) are courses offered for free for any students with an internet connection. Many institutions now offer free MOOCs, including prestigious state universities and private schools. MOOCs are differentiated from ordinary online classes in several ways. Some MOOCs may have as many 50,000 students enrolled in a course…

Communicating with Congress

ERIC Educational Resources Information Center

Ochs, Mike

2005-01-01

At a seminar, two Congressional staff members offered good tips on how it is best to communicate with legislators. Although offered in the context of communicating with Congress, these insights are also valuable when working with state and local legislators. This article discusses the key points that were provided in the seminar. In addition to…

[Portal hypertension. Evidence-based guide].

PubMed

Mercado, Miguel Angel; Orozco Zepeda, Héctor; Plata-Muñoz, Juan José

2004-01-01

Treatment of portal hypertension has evolved widely during the last decades. Advances in physiopathology have allowed better application of therapeutic options and also have permitted to know the natural history of varices and variceal bleeding, predicting which patients have a higher risk of bleeding. It also permits probability of designing patient treatment. According to liver function and subadjacent liver disease, it is possible to offer different alternatives within the three possible scenarios (primary prophylaxis, acute bleeding episode, and secondary prophylaxis). For primary prophylaxis, pharmacotherapy offers the best choice. Endoscopic banding is also growing in these scenarios and probably will be accepted in the near future. For the acute bleeding episode, endoscopic therapy (sclerosis and/or bands) and/or pharmacologic therapy (octreotide, terlipresin) represent best choice, considering TIPS as a rescue option. Surgery is not used routinely in this scenario in most centers. For secondary prophylaxis, pharmaco- and endoscopic therapy are first-line treatments, while TIPS and surgery as second-line treatments. TIPS is mainly used in patients on a waiting list for liver transplantation. Surgery offers good results for low-risk patients, with good liver function and with portal blood-flow preserving procedures (selective shunts, extensive devascularizations). Liver transplantation is recommended for patients with poor liver function because together with portal hypertension, it treats subadjacent liver disease.

Leyendo con tu hijo: Consejos practicos para los padres... (Reading with Your Child: Practical Advice for Parents...).

ERIC Educational Resources Information Center

Colorado State Dept. of Education, Denver.

This brochure (in Spanish) offers some practical tips for Spanish-speaking parents who wish to read to their young children. The brochure first provides general tips, such as "Lea a su hijo en voz alto por lo menos unos 15 minutos todos los dias" (Read to your child aloud for at least 15 minutes daily), and "Estabeleza una rotina y…

Aluminium localization in root tips of the aluminium-accumulating plant species buckwheat (Fagopyrum esculentum Moench)

PubMed Central

Klug, Benjamin; Specht, André; Horst, Walter J.

2011-01-01

Aluminium (Al) uptake and transport in the root tip of buckwheat is not yet completely understood. For localization of Al in root tips, fluorescent dyes and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) were compared. The staining of Al with morin is an appropriate means to study qualitatively the radial distribution along the root tip axis of Al which is complexed by oxalate and citrate in buckwheat roots. The results compare well with the distribution of total Al determined by LA-ICP-MS which could be reliably calibrated to compare with Al contents by conventional total Al determination using graphite furnace atomic absorption spectrometry. The Al localization in root cross-sections along the root tip showed that in buckwheat Al is highly mobile in the radial direction. The root apex predominantly accumulated Al in the cortex. The subapical root section showed a homogenous Al distribution across the whole section. In the following root section Al was located particularly in the pericycle and the xylem parenchyma cells. With further increasing distance from the root apex Al could be detected only in individual xylem vessels. The results support the view that the 10 mm apical root tip is the main site of Al uptake into the symplast of the cortex, while the subapical 10–20 mm zone is the main site of xylem loading through the pericycle and xylem parenchyma cells. Progress in the better molecular understanding of Al transport in buckwheat will depend on the consideration of the tissue specificity of Al transport and complexation. PMID:21831842

Atomizing nozzle and method

DOEpatents

Ting, Jason; Anderson, Iver E.; Terpstra, Robert L.

2000-03-16

A high pressure close-coupled gas atomizing nozzle includes multiple discrete gas jet discharge orifices having aerodynamically designed convergent-divergent geometry with an first converging section communicated to a gas supply manifold and to a diverging section by a constricted throat section to increase atomizing gas velocity. The gas jet orifices are oriented at gas jet apex angle selected relative to the melt supply tip apex angle to establish a melt aspiration condition at the melt supply tip.

Post space debridement in oval-shaped canals: the use of a new ultrasonic tip with oval section.

PubMed

Coniglio, Ivanovic; Carvalho, Carlos Augusto; Magni, Elisa; Cantoro, Amerigo; Ferrari, Marco

2008-06-01

This study evaluates the effect on post space debridement in oval-shaped canals of an experimental ultrasonic tip with oval section (Satelec) compared with a circular ultrasonic tip (KaVo). Thirty teeth with an oval-shaped canal were endodontically treated and obturated and then randomly divided into 3 groups (n = 10) according to the procedure used for post space debridement: Satelec tip, Largo #2 drill + KaVo file, and Largo #2 drill + water. Debris and dentin tubules were evaluated by assigning scores to scanning electron microscope post spaces images; lower scores corresponded to fewer debris and higher number of open tubules. The Satelec group showed significantly lower debris and open tubules scores than KaVo group (p < .05) and control group (p < .05), which differed significantly between each other (p < .05). Also the debris and open tubules scores in different post space regions differed significantly among the experimental groups (p < .001). The oval ultrasonic tip resulted in a better post space debridement than a circular ultrasonic tip in oval-shaped canals.

A Dual Sensor for pH and Hydrogen Peroxide Using Polymer-Coated Optical Fibre Tips.

PubMed

Purdey, Malcolm S; Thompson, Jeremy G; Monro, Tanya M; Abell, Andrew D; Schartner, Erik P

2015-12-17

This paper demonstrates the first single optical fibre tip probe for concurrent detection of both hydrogen peroxide (H₂O₂) concentration and pH of a solution. The sensor is constructed by embedding two fluorophores: carboxyperoxyfluor-1 (CPF1) and seminaphtharhodafluor-2 (SNARF2) within a polymer matrix located on the tip of the optical fibre. The functionalised fibre probe reproducibly measures pH, and is able to accurately detect H₂O₂ over a biologically relevant concentration range. This sensor offers potential for non-invasive detection of pH and H₂O₂ in biological environments using a single optical fibre.

Phase-Imaging with a Sharpened Multi-Walled Carbon Nanotube AFM Tip: Investigation of Low-k Dielectric Polymer Hybrids

NASA Technical Reports Server (NTRS)

Nguyen, Cattien V.; Stevens, Ramsey M.; Meyyappan, M.; Volksen, Willi; Miller, Robert D.

2005-01-01

Phase shift tapping mode scanning force microscopy (TMSFM) has evolved into a very powerful technique for the nanoscale surface characterization of compositional variations in heterogeneous samples. Phase shift signal measures the difference between the phase angle of the excitation signal and the phase angle of the cantilever response. The signal correlates to the tip-sample inelastic interactions, identifying the different chemical and/or physical property of surfaces. In general, the resolution and quality of scanning probe microscopic images are highly dependent on the size of the scanning probe tip. In improving AFM tip technology, we recently developed a technique for sharpening the tip of a multi-walled carbon nanotube (CNT) AFM tip, reducing the radius of curvature of the CNT tip to less than 5 nm while still maintaining the inherent stability of multi-walled CNT tips. Herein we report the use of sharpened (CNT) AFM tips for phase-imaging of polymer hybrids, a precursor for generating nanoporous low-k dielectrics for on-chip interconnect applications. Using sharpened CNT tips, we obtained phase-contrast images having domains less than 10 nm. In contrast, conventional Si tips and unsharpened CNT tips (radius greater than 15 nm) were not able to resolve the nanoscale domains in the polymer hybrid films. C1early, the size of the CNT tip contributes significantly to the resolution of phase-contrast imaging. In addition, a study on the nonlinear tapping dynamics of the multi-walled CNT tip indicates that the multi-walled CNT tip is immune to conventional imaging instabilities related to the coexistence of attractive and repulsive tapping regimes. This factor may also contribute to the phase-contrast image quality of multi-walled CNT AFM tips. This presentation will also offer data in support of the stability of the CNT tip for phase shift TMSFM.

Down and Dirty.

ERIC Educational Resources Information Center

Greeley, Geoffrey

2001-01-01

Offers 10 tips that can help school and university custodial staffs maintain a healthy physical environment. Suggestions include ideas for carpet cleaning, maintenance planning, and trapping outside dirt.(GR)

Intellectual Disability

MedlinePlus

... Tips for teachers Tips for parents Organizations Matthew’s Story Matt is 15 years old. Because Matt has ... strives to be ever conscious of accessibility in technology. In compliance with Section 508 of the Rehabilitation ...

Moving an Evidence-Based Policy Agenda Forward: Leadership Tips From the Field.

PubMed

Garrett, Teresa

2018-05-01

Advancing evidence-based policy change is a leadership challenge that nurses should embrace. Key tips to ensure that evidence-based policy changes are successful at the individual, community, and population levels are offered to help nurses through the change process. The public trust in the nursing profession is a leverage point that should be used to advance the use of evidence, expedite change, and improve health for students and across communities.

What Every New Media Specialist Needs to Know: These 10 Tips Can Help Your Career Get off to a Great Start

ERIC Educational Resources Information Center

Corbo, Donna; Sample, Candace

2010-01-01

It's not easy being a media specialist, especially if one is new to the profession or one has switched schools and is suddenly the "new kid on the block." This article offers 10 road-tested tips that will help every new media specialist not only survive, but also "thrive": (1) Learn the curriculum; (2) Document! Document! Document! (3) Smile and…

26 CFR 31.3402(k)-1 - Special rule for tips.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 26 Internal Revenue 15 2013-04-01 2013-04-01 false Special rule for tips. 31.3402(k)-1 Section 31.3402(k)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) EMPLOYMENT... Collection of Income Tax at Source § 31.3402(k)-1 Special rule for tips. (a) Withholding of income tax in...

26 CFR 31.3402(k)-1 - Special rule for tips.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 26 Internal Revenue 15 2011-04-01 2011-04-01 false Special rule for tips. 31.3402(k)-1 Section 31.3402(k)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) EMPLOYMENT... Collection of Income Tax at Source § 31.3402(k)-1 Special rule for tips. (a) Withholding of income tax in...

26 CFR 31.3402(k)-1 - Special rule for tips.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 15 2010-04-01 2010-04-01 false Special rule for tips. 31.3402(k)-1 Section 31.3402(k)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) EMPLOYMENT... Collection of Income Tax at Source § 31.3402(k)-1 Special rule for tips. (a) Withholding of income tax in...

26 CFR 31.3402(k)-1 - Special rule for tips.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 26 Internal Revenue 15 2014-04-01 2014-04-01 false Special rule for tips. 31.3402(k)-1 Section 31.3402(k)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) EMPLOYMENT... Collection of Income Tax at Source § 31.3402(k)-1 Special rule for tips. (a) Withholding of income tax in...

26 CFR 31.3402(k)-1 - Special rule for tips.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 26 Internal Revenue 15 2012-04-01 2012-04-01 false Special rule for tips. 31.3402(k)-1 Section 31.3402(k)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) EMPLOYMENT... Collection of Income Tax at Source § 31.3402(k)-1 Special rule for tips. (a) Withholding of income tax in...

21 CFR 872.6650 - Massaging pick or tip for oral hygiene.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Massaging pick or tip for oral hygiene. 872.6650 Section 872.6650 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES... hygiene. (a) Identification. A massaging pick or tip for oral hygiene is a rigid, pointed device intended...

26 CFR 31.3121(q)-1 - Tips included for employee taxes.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 26 Internal Revenue 15 2014-04-01 2014-04-01 false Tips included for employee taxes. 31.3121(q)-1 Section 31.3121(q)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED... § 31.3121(q)-1 Tips included for employee taxes. (a) In general. Except as otherwise provided in...

26 CFR 31.3121(q)-1 - Tips included for employee taxes.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 26 Internal Revenue 15 2011-04-01 2011-04-01 false Tips included for employee taxes. 31.3121(q)-1 Section 31.3121(q)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED... § 31.3121(q)-1 Tips included for employee taxes. (a) In general. Except as otherwise provided in...

26 CFR 31.3121(q)-1 - Tips included for employee taxes.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 26 Internal Revenue 15 2012-04-01 2012-04-01 false Tips included for employee taxes. 31.3121(q)-1 Section 31.3121(q)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED... § 31.3121(q)-1 Tips included for employee taxes. (a) In general. Except as otherwise provided in...

26 CFR 31.3121(q)-1 - Tips included for employee taxes.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 26 Internal Revenue 15 2013-04-01 2013-04-01 false Tips included for employee taxes. 31.3121(q)-1 Section 31.3121(q)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED... § 31.3121(q)-1 Tips included for employee taxes. (a) In general. Except as otherwise provided in...

Oil-flow study of a Space Shuttle orbiter tip-fin controller

NASA Technical Reports Server (NTRS)

Helms, V. T., III

1983-01-01

Possible use of tip-fin controllers instead of a vertical tail on advanced winged entry vehicles was examined. Elimination of the vertical tail and using tip-fins offers the advantages of positive yaw control at high angles of attack and a potential weight savings. Oil-flow technique was used to obtain surface flow patterns on a tip-fin installed on a 0.01-scale Space Shuttle orbiter model for the purpose of assessing the extent of flow interference effects on the wing and tip-fin which might lead to serious heating problems. Tests were conducted in air at Mach 10 for a free-stream Reynolds numbers of .000113 at 20, 30, and 40 degree angle of attack and sideslip angles of 0 and 2 degree. Elevon deflections of -10, 0, and 10 degree and tip-fin control-surface deflections of 0, 20, and 40 degree were employed. Test results were also used to aid in the interpretation of heating data obtained on a Shuttle orbiter tip-fin on another model in a different facility. A limited comparison of oil-flow patterns and heat-transfer data is included. It was determined that elevon deflection angles from -10 to 10 degree and sideslip angles up to 2 degree have very little effect on tip-fin surface flow patterns. Also, there is a minimum of interference between the tip-fin and the wing. The most significant flow interactions occur on the tip-fin onboard surface as a result of its control-surface deflections.

Dental Health - Multiple Languages

MedlinePlus

... Section Concerns and Discomforts of Pregnancy: Oral Health - English PDF Concerns and Discomforts of Pregnancy: Oral Health - ... Alliance Tips for Good Oral Health During Pregnancy - English PDF Tips for Good Oral Health During Pregnancy - ...

Transonic rotor tip design using numerical optimization

NASA Technical Reports Server (NTRS)

Tauber, Michael E.; Langhi, Ronald G.

1985-01-01

The aerodynamic design procedure for a new blade tip suitable for operation at transonic speeds is illustrated. For the first time, 3 dimensional numerical optimization was applied to rotor tip design, using the recent derivative of the ROT22 code, program R22OPT. Program R22OPT utilized an efficient quasi-Newton optimization algorithm. Multiple design objectives were specified. The delocalization of the shock wave was to be eliminated in forward flight for an advance ratio of 0.41 and a tip Mach number of 0.92 at psi = 90 deg. Simultaneously, it was sought to reduce torque requirements while maintaining effective restoring pitching moments. Only the outer 10 percent of the blade span was modified; the blade area was not to be reduced by more than 3 percent. The goal was to combine the advantages of both sweptback and sweptforward blade tips. A planform that featured inboard sweepback was combined with a sweptforward tip and a taper ratio of 0.5. Initially, the ROT22 code was used to find by trial and error a planform geometry which met the design goals. This configuration had an inboard section with a leading edge sweep of 20 deg and a tip section swept forward at 25 deg; in addition, the airfoils were modified.

Droplet Breakup in Expansion-contraction Microchannels

PubMed Central

Zhu, Pingan; Kong, Tiantian; Lei, Leyan; Tian, Xiaowei; Kang, Zhanxiao; Wang, Liqiu

2016-01-01

We investigate the influences of expansion-contraction microchannels on droplet breakup in capillary microfluidic devices. With variations in channel dimension, local shear stresses at the injection nozzle and focusing orifice vary, significantly impacting flow behavior including droplet breakup locations and breakup modes. We observe transition of droplet breakup location from focusing orifice to injection nozzle, and three distinct types of recently-reported tip-multi-breaking modes. By balancing local shear stresses and interfacial tension effects, we determine the critical condition for breakup location transition, and characterize the tip-multi-breaking mode quantitatively. In addition, we identify the mechanism responsible for the periodic oscillation of inner fluid tip in tip-multi-breaking mode. Our results offer fundamental understanding of two-phase flow behaviors in expansion-contraction microstructures, and would benefit droplet generation, manipulation and design of microfluidic devices. PMID:26899018

Automated On-tip Affinity Capture Coupled with Mass Spectrometry to Characterize Intact Antibody-Drug Conjugates from Blood

NASA Astrophysics Data System (ADS)

Li, Ke Sherry; Chu, Phillip Y.; Fourie-O'Donohue, Aimee; Srikumar, Neha; Kozak, Katherine R.; Liu, Yichin; Tran, John C.

2018-05-01

Antibody-drug conjugates (ADCs) present unique challenges for ligand-binding assays primarily due to the dynamic changes of the drug-to-antibody ratio (DAR) distribution in vivo and in vitro. Here, an automated on-tip affinity capture platform with subsequent mass spectrometry analysis was developed to accurately characterize the DAR distribution of ADCs from biological matrices. A variety of elution buffers were tested to offer optimal recovery, with trastuzumab serving as a surrogate to the ADCs. High assay repeatability (CV 3%) was achieved for trastuzumab antibody when captured below the maximal binding capacity of 7.5 μg. Efficient on-tip deglycosylation was also demonstrated in 1 h followed by affinity capture. Moreover, this tip-based platform affords higher throughput for DAR characterization when compared with a well-characterized bead-based method.

Functional Relationships between the AcrA Hairpin Tip Region and the TolC Aperture Tip Region for the Formation of the Bacterial Tripartite Efflux Pump AcrAB-TolC ▿ † ‡

PubMed Central

Kim, Hong-Man; Xu, Yongbin; Lee, Minho; Piao, Shunfu; Sim, Se-Hoon; Ha, Nam-Chul; Lee, Kangseok

2010-01-01

Tripartite efflux pumps found in Gram-negative bacteria are involved in antibiotic resistance and toxic-protein secretion. In this study, we show, using site-directed mutational analyses, that the conserved residues located in the tip region of the α-hairpin of the membrane fusion protein (MFP) AcrA play an essential role in the action of the tripartite efflux pump AcrAB-TolC. In addition, we provide in vivo functional data showing that both the length and the amino acid sequence of the α-hairpin of AcrA can be flexible for the formation of a functional AcrAB-TolC pump. Genetic-complementation experiments further indicated functional interrelationships between the AcrA hairpin tip region and the TolC aperture tip region. Our findings may offer a molecular basis for understanding the multidrug resistance of pathogenic bacteria. PMID:20581201

Up in Smoke.

ERIC Educational Resources Information Center

Black, Susan

2002-01-01

Reviews research on adolescent smoking and nicotine addiction. Finds, for example, that smoking is linked to depression. Describes five stages of nicotine addiction. Offers tips for prevention. (Contains 12 references.) (PKP)

Sam Donaldson: Tips From a Cancer Survivor

MedlinePlus

... Home Current Issue Past Issues Special Section Sam Donaldson: Tips From a Cancer Survivor Past Issues / Spring ... courtesy of ABC News For 40 years, Sam Donaldson has worked for ABC News, reporting from virtually ...

Health Information in German (Deutsch)

MedlinePlus

... Disease Control and Prevention N Expand Section Nutrition Choose MyPlate: 10 Tips to a Great Plate - English PDF Choose MyPlate: 10 Tips to a Great Plate - Deutsch (German) PDF Center for Nutrition Policy and ...

Health Information in Italian (Italiano)

MedlinePlus

... in a new window. N Expand Section Nutrition Choose MyPlate: 10 Tips to a Great Plate - English PDF Choose MyPlate: 10 Tips to a Great Plate - Italiano (Italian) PDF Center for Nutrition Policy and ...

Redesigned rotor for a highly loaded, 1800 ft/sec tip speed compressor fan stage 1: Aerodynamic and mechanical design

NASA Technical Reports Server (NTRS)

Halle, J. E.; Ruschak, J. T.

1975-01-01

A highly loaded, high tip-speed fan rotor was designed with multiple-circular-arc airfoil sections as a replacement for a marginally successful rotor which had precompression airfoil sections. The substitution of airfoil sections was the only aerodynamic change. Structural design of the redesigned rotor blade was guided by successful experience with the original blade. Calculated stress levels and stability parameters for the redesigned rotor are within limits demonstrated in tests of the original rotor.

29 CFR 531.56 - “More than $20 a month in tips.”

Code of Federal Regulations, 2010 CFR

2010-07-01

... the meaning of the Act, is a “tipped employee” under the definition in section 3(t) when, in the.... The definition of tipped employee does not require that the calendar month be used in determining... situations an employee is employed in a dual job, as for example, where a maintenance man in a hotel also...

Ten Tips for Teaching a Web Course

ERIC Educational Resources Information Center

D'Orsie, Sharon M.; Day, Karen

2006-01-01

Distance learning is a growing trend. There were an estimated 3,077,000 enrollments in all distance education courses offered by two- and four-year institutions in 2000-2001. A survey by the National Center for Educational Statistics revealed that in 2000-2001, 56 percent of two- and four-year degree-granting institutions offered some type of…

Developing the Psychologist's Credibility in Teaching First-Year Medical Students.

ERIC Educational Resources Information Center

1984

Tips are offered for psychologists who teach behavioral science to first-year medical students, based on a course offered at Creighton Medical School. It is suggested that medical students will work hard and are interested in learning topics that will be useful. It is important for the psychology instructor to teach a body of knowledge to medical…

Stories for the Campfire: A Collection of Memorable Tales for Camp.

ERIC Educational Resources Information Center

Hanson, Bob, Ed.; Roemmich, Bill, Ed.

This book offers 46 children's camp stories, including stories about ghosts, adventure, other lands, humor, Indian fables, and stories with a moral. An introduction offers some background of the publication and a few tips on successful story-telling. The stories include: A Full Meal; A Fuzzy Tale; An Ameri-Indian's Ecological Lament and Prophecy;…

Am I Fat? Helping Young Children Accept Differences in Body Size.

ERIC Educational Resources Information Center

Ikeda, Joanne; Naworski, Priscilla

This book offers information and ideas to support teachers, parents and other caregivers in their efforts to help children accept and like their bodies. It includes specific tips on dealing with body image issues and suggestions for role modeling healthy attitudes about body size. It also offers suggestions for healthy eating, increasing physical…

The Original Handhelds: Magazines that Teens Can't Resist.

ERIC Educational Resources Information Center

Webber, Carlie

2009-01-01

In a world of instant messages, Twitter, and Facebook, what do magazines have to offer teens? Well, as it turns out, plenty. For starters, they feature celebrity gossip, humor, beauty tips, sports, and even manga. Some magazines offer online content that can only be accessed by using a special code that's available in the print edition. Recently,…

"DI Days:" Differentiating Instruction through Student Choice. Classroom Tips

ERIC Educational Resources Information Center

Hammond, Donald J.

2011-01-01

To better meet the needs of the author's high school students, who have a variety of abilities, interests and engagement levels, he often differentiates instruction through the use of "DI Days." On these days, students use a choice board to select from a wide range of activities offered in learning centers. Each center offers content-focused…

Top Tips for Senior Leaders in Schools and Colleges: How to Provide Meaningful Experience of the World of Work for Young People as Part of 16 to 19 Study Programmes

ERIC Educational Resources Information Center

National Foundation for Educational Research, 2015

2015-01-01

A core part of 16 to 19 study programmes is the provision of work experience for all young people. It is increasingly recognised that young people need to develop their employability skills, alongside qualifications, in preparation for the world of work and securing a job. This top tips guide offers advice to schools and colleges wishing to…

Hypersonic research engine project. Phase 2: Aerothermodynamic integration model development

NASA Technical Reports Server (NTRS)

Jilly, L. F. (Editor)

1970-01-01

The analytical effort was directed towards (1) completing the design of the combustor exit instrumentation assembly, (2) analyzing the coolant flow distribution of the cowl leading edge tip section, (3) determining effects of purge gas pressure on AIM performance analysis, and (4) analyzing heat transfer and associated stress problems related to the cowl leading edge tip section and the nozzle shroud assembly for test conditions.

For Parents' Sake: A Survival Kit for Parents and Kids. Volume II: Tips for Parents.

ERIC Educational Resources Information Center

Butchee, Brenda, Ed.; And Others

Developed by the Oklahoma State Department of Health, this booklet is the second in a series that provides tips that parents can use to help their children grow. The booklet is divided into three sections. The first section, "Getting Along as a Person," discusses a child's self-esteem, self-concept, and self-control, and suggests ways for parents…

CSC Tip Sheets: Working with Corporations

EPA Pesticide Factsheets

Programs can work with corporations to reduce companies’ greenhouse gas emissions and energy use, as well as create partnerships to reach employees and the community with local sustainability program offerings.

"In Loco Parentis" Revisited?

ERIC Educational Resources Information Center

Murphree, Carolyn T.

1986-01-01

Suggests that many students are not aware of proper etiquette and proposes that business communication instructors offer a short bibliography and a few tips that can help students acquire more polish. (DF)

Health Information in Malay (Bahasa Malaysia)

MedlinePlus

... in a new window. N Expand Section Nutrition Choose MyPlate: 10 Tips to a Great Plate - English PDF Choose MyPlate: 10 Tips to a Great Plate - Bahasa Malaysia (Malay) PDF Center for Nutrition Policy ...

[Application of SPSS orthogonal design in tissue culture of Anoectochilus roxburghii].

PubMed

Zhang, Fusheng; Guo, Shunxing

2009-10-01

To study the effect of the different constitutions of plant hormone on the development of Anoectochilus roxburghii. A. roxburghii were harvested after having been cultured for 60 days. An orthogonal design was used to study the effect of NAA and 6-BA on the leaf number, eustipe number, lateral branch number of the stem tip and stem section, and the height of the stem tips. All of the data were processed by SPSS. It is reported for the first time that NAA could make different development of A. roxburghii at low concentration ( < 1 mg L(-1)) and high concentration ( > 1 mg L(-1)). The optimum constitution of MS medium was NAA 0.5 mg L(-1) + 6-BA 1 mg L(-1) for the growth of the stem tip of A. roxburghii, and NAA 1 mg L(-1) + 6-BA 2 mg L(-1) for the differentiation of bud and the formation of lateral branch of the stem section. The different concentrations of NAA and 6-BA had different effects on the growth and differentiation of the stem tip and the stem section of A. roxburghii.

Fast food tips

MedlinePlus

... food. When You Go to a Fast Food Restaurant Knowing the amount of calories, fat, and salt ... fast foods can help you eat healthier. Many restaurants now offer information about their food. This information ...

Seeing Glass Contractors Clearly.

ERIC Educational Resources Information Center

Deliberato, Jerry

2003-01-01

Offers seven tips for finding and working with an effective glass contractor. For example, schools should consider the company's reputation and longevity of service, and whether it has in-house engineering capabilities. (EV)

Twelve tips for effective body language for medical educators.

PubMed

Hale, Andrew J; Freed, Jason; Ricotta, Daniel; Farris, Grace; Smith, C Christopher

2017-09-01

A significant proportion of human communication is nonverbal. Although the fields of business and psychology have significant literature on effectively using body language in a variety of situations, there is limited literature on effective body language for medical educators. To provide 12 tips to highlight effective body language strategies and techniques for medical educators. The tips provided are based on our experiences and reflections as clinician-educators and the available literature. The 12 tips presented offer specific strategies to engage learners, balance learner participation, and bring energy and passion to teaching. Medical educators seeking to maximize their effectiveness would benefit from an understanding of how body language affects a learning environment and how body language techniques can be used to engage audiences, maintain attention, control challenging learners, and convey passion for a topic. Understanding and using body language effectively is an important instructional skill.

Robust Optimization Design for Turbine Blade-Tip Radial Running Clearance using Hierarchically Response Surface Method

NASA Astrophysics Data System (ADS)

Zhiying, Chen; Ping, Zhou

2017-11-01

Considering the robust optimization computational precision and efficiency for complex mechanical assembly relationship like turbine blade-tip radial running clearance, a hierarchically response surface robust optimization algorithm is proposed. The distribute collaborative response surface method is used to generate assembly system level approximation model of overall parameters and blade-tip clearance, and then a set samples of design parameters and objective response mean and/or standard deviation is generated by using system approximation model and design of experiment method. Finally, a new response surface approximation model is constructed by using those samples, and this approximation model is used for robust optimization process. The analyses results demonstrate the proposed method can dramatic reduce the computational cost and ensure the computational precision. The presented research offers an effective way for the robust optimization design of turbine blade-tip radial running clearance.

Effect of Electric Field Gradient on Sub-nanometer Spatial Resolution of Tip-enhanced Raman Spectroscopy

PubMed Central

Meng, Lingyan; Yang, Zhilin; Chen, Jianing; Sun, Mengtao

2015-01-01

Tip-enhanced Raman spectroscopy (TERS) with sub-nanometer spatial resolution has been recently demonstrated experimentally. However, the physical mechanism underlying is still under discussion. Here we theoretically investigate the electric field gradient of a coupled tip-substrate system. Our calculations suggest that the ultra-high spatial resolution of TERS can be partially attributed to the electric field gradient effect owning to its tighter spatial confinement and sensitivity to the infrared (IR)-active of molecules. Particularly, in the case of TERS of flat-lying H2TBPP molecules,we find the electric field gradient enhancement is the dominating factor for the high spatial resolution, which qualitatively coincides with previous experimental report. Our theoretical study offers a new paradigm for understanding the mechanisms of the ultra-high spatial resolution demonstrated in tip-enhanced spectroscopy which is of importance but neglected. PMID:25784161

A compact CCD-monitored atomic force microscope with optical vision and improved performances.

PubMed

Mingyue, Liu; Haijun, Zhang; Dongxian, Zhang

2013-09-01

A novel CCD-monitored atomic force microscope (AFM) with optical vision and improved performances has been developed. Compact optical paths are specifically devised for both tip-sample microscopic monitoring and cantilever's deflection detecting with minimized volume and optimal light-amplifying ratio. The ingeniously designed AFM probe with such optical paths enables quick and safe tip-sample approaching, convenient and effective tip-sample positioning, and high quality image scanning. An image stitching method is also developed to build a wider-range AFM image under monitoring. Experiments show that this AFM system can offer real-time optical vision for tip-sample monitoring with wide visual field and/or high lateral optical resolution by simply switching the objective; meanwhile, it has the elegant performances of nanometer resolution, high stability, and high scan speed. Furthermore, it is capable of conducting wider-range image measurement while keeping nanometer resolution. Copyright © 2013 Wiley Periodicals, Inc.

41 CFR 301-10.421 - How much will my agency reimburse me for a tip to a taxi, shuttle service, or courtesy...

Code of Federal Regulations, 2011 CFR

2011-07-01

... 41 Public Contracts and Property Management 4 2011-07-01 2011-07-01 false How much will my agency reimburse me for a tip to a taxi, shuttle service, or courtesy transportation driver? 301-10.421 Section 301... tip to a taxi, shuttle service, or courtesy transportation driver? An amount which your agency...

41 CFR 301-10.421 - How much will my agency reimburse me for a tip to a taxi, shuttle service, or courtesy...

Code of Federal Regulations, 2010 CFR

2010-07-01

... 41 Public Contracts and Property Management 4 2010-07-01 2010-07-01 false How much will my agency reimburse me for a tip to a taxi, shuttle service, or courtesy transportation driver? 301-10.421 Section 301... tip to a taxi, shuttle service, or courtesy transportation driver? An amount which your agency...

Improving Your Health: Tips for African American Men and Women

MedlinePlus

... For Reporters Meetings & Workshops Follow Us Home Health Information Weight Management Health Tips for African-Americans Related Topics Section ... at NIDDK Technology Advancement & Transfer Meetings & Workshops Health Information ... Disease Urologic Diseases Endocrine Diseases Diet & Nutrition ...

Turbo machine tip clearance and vibration measurements using a fibre optic laser Doppler position sensor

NASA Astrophysics Data System (ADS)

Pfister, T.; Büttner, L.; Czarske, J.; Krain, H.; Schodl, R.

2006-07-01

This paper presents a novel fibre optic laser Doppler position sensor for single blade tip clearance and vibration measurements at turbo machines, which offers high temporal resolution and high position resolution simultaneously. The sensor principle is based on the generation of a measurement volume consisting of two superposed fan-like interference fringe systems with contrary fringe spacing gradients using wavelength division multiplexing. A flexible and robust measurement system with an all-passive fibre coupled measurement head has been realized employing diffractive and refractive optics. Measurements of tip clearance and rotor vibrations at a transonic centrifugal compressor performed during operation at up to 50 000 rpm (833 Hz) corresponding to 21.7 kHz blade frequency and 586 m s-1 blade tip velocity are presented. The results are in excellent agreement with those of capacitive probes. The mean uncertainty of the position measurement was around 20 µm and, thus, considerably better than for conventional tip clearance probes. Consequently, this sensor is capable of fulfilling the requirements for future active clearance control systems and has great potential for in situ and online tip clearance and vibration measurements at metallic and non-metallic turbine blades with high precision.

Tips for Buying Exercise Equipment

MedlinePlus

... July 2012 You Might Also Like Dietary Supplements "Free" Trial Offers? Shopping for Home Appliances? Use the EnergyGuide Label Search form Search menu Money & Credit Homes & Mortgages Health & Fitness Healthy Living Treatments & ...

Vamos juntos a la escuela: Consejos para ayudar a los padres a asegurar el exito academico de sus hijos (Let's Go to School Together: Tips To Help Parents Ensure Their Children's Educational Success). [Videotape Kit].

ERIC Educational Resources Information Center

Information Resource Center (ED), Washington, DC.

Noting research showing that when parents are involved in their children's learning, students achieve more and are less likely to drop out of school, this videotape kit offers Spanish-speaking parents tips to help them become involved in their children's learning, from infancy through adolescence. The kit is intended for use in schools,…

The Freshman Nine: Helping High School Freshmen Be Successful in AP Human Geography

ERIC Educational Resources Information Center

Garner, Jennifer

2012-01-01

Teaching AP Human Geography to freshmen seems like a daunting task and while there are many arguments both for and against offering the course to freshmen, for many teachers it is reality. In this article, the author offers nine tips to help high school freshmen be successful in the course and on the AP exam.

Health Information in Pashto (Pax̌tō / پښتو )

MedlinePlus

... of Louisville P Expand Section Parenting Communicating With Children About Sex: General Tips - English PDF Communicating With Children About Sex: General Tips - Pax̌tō / پښتو (Pashto) PDF Communicating With ...

Health Information in Urdu (اردو)

MedlinePlus

... Disease Control and Prevention N Expand Section Nutrition Choose MyPlate: 10 Tips to a Great Plate - English PDF Choose MyPlate: 10 Tips to a Great Plate - اردو (Urdu) PDF Center for Nutrition Policy and ...

Start a Summer Arts Program.

ERIC Educational Resources Information Center

Pedersen, Kirie

1984-01-01

Tips on organizing a creative teaching experience for summer vacation time are offered. Program organization, student selection, course content, publicity, and funding are aspects to be considered when planning a summer arts program. (DF)

The Challenge of Winter Backpacking.

ERIC Educational Resources Information Center

Cavanaugh, Michael; Mapes, Alan

1981-01-01

Tips and techniques for safe and enjoyable winter backpacking are offered. Topics covered include cross county skis, snowshoes, clothing, footwear, shelter, sleeping bags, food, hypothermia prevention, as well as general rules and requirements. (CO)

Organizations That Offer Support Services

MedlinePlus

... help finding support services? View more than 100 organizations nationwide that provide emotional, practical, and financial support ... Groups Treatment Review our tips to find helpful organizations and resources in your community. Print E-mail ...

What Works for Me.

ERIC Educational Resources Information Center

Wolf, Lori; And Others

1994-01-01

Offers 11 classroom tips from teachers for a variety of activities, including fictional movie reviews, haiku writing, questions to develop student journals, handouts, rewriting stories, and a "dirty trick" to get better research topics. (SR)

Simulation of CNT-AFM tip based on finite element analysis for targeted probe of the biological cell

DOE Office of Scientific and Technical Information (OSTI.GOV)

Yousefi, Amin Termeh, E-mail: at.tyousefi@gmail.com; Miyake, Mikio, E-mail: miyakejaist@gmail.com; Ikeda, Shoichiro, E-mail: sho16.ikeda@gmail.com

Carbon nanotubes (CNTs) are potentially ideal tips for atomic force microscopy (AFM) due to the robust mechanical properties, nano scale diameter and also their ability to be functionalized by chemical and biological components at the tip ends. This contribution develops the idea of using CNTs as an AFM tip in computational analysis of the biological cell’s. Finite element analysis employed for each section and displacement of the nodes located in the contact area was monitored by using an output database (ODB). This reliable integration of CNT-AFM tip process provides a new class of high performance nanoprobes for single biological cellmore » analysis.« less

Twelve tips for teaching in a provincially distributed medical education program.

PubMed

Wong, Roger Y; Chen, Luke; Dhadwal, Gurbir; Fok, Mark C; Harder, Ken; Huynh, Hanh; Lunge, Ryan; Mackenzie, Mark; Mckinney, James; Ovalle, William; Rauniyar, Pooja; Tse, Luke; Villanyi, Diane

2012-01-01

As distributed undergraduate and postgraduate medical education becomes more common, the challenges with the teaching and learning process also increase. To collaboratively engage front line teachers in improving teaching in a distributed medical program. We recently conducted a contest on teaching tips in a provincially distributed medical education program and received entries from faculty and resident teachers. Tips that are helpful for teaching around clinical cases at distributed teaching sites include: ask "what if" questions to maximize clinical teaching opportunities, try the 5-min short snapper, multitask to allow direct observation, create dedicated time for feedback, there are really no stupid questions, and work with heterogeneous group of learners. Tips that are helpful for multi-site classroom teaching include: promote teacher-learner connectivity, optimize the long distance working relationship, use the reality television show model to maximize retention and captivate learners, include less teaching content if possible, tell learners what you are teaching and make it relevant and turn on the technology tap to fill the knowledge gap. Overall, the above-mentioned tips offered by front line teachers can be helpful in distributed medical education.

Investigation of Unsteady Tip Clearance Flow in a Low-Speed One and Half Stage Axial Compressor with LES And PIV

NASA Technical Reports Server (NTRS)

Hah, Chunill; Hathaway, Michael; Katz, Joseph; Tan, David

2015-01-01

The primary focus of this paper is to investigate how a rotor's unsteady tip clearance flow structure changes in a low speed one and half stage axial compressor when the rotor tip gap size is increased from 0.5 mm (0.49% of rotor tip blade chord, 2% of blade span) to 2.4 mm (2.34% chord, 4% span) at the design condition are investigated. The changes in unsteady tip clearance flow with the 0.62 % tip gap as the flow rate is reduced to near stall condition are also investigated. A Large Eddy Simulation (LES) is applied to calculate the unsteady flow field at these three flow conditions. Detailed Stereoscopic PIV (SPIV) measurements of the current flow fields were also performed at the Johns Hopkins University in a refractive index-matched test facility which renders the compressor blades and casing optically transparent. With this setup, the unsteady velocity field in the entire flow domain, including the flow inside the tip gap, can be measured. Unsteady tip clearance flow fields from LES are compared with the PIV measurements and both LES and PIV results are used to study changes in tip clearance flow structures. The current study shows that the tip clearance vortex is not a single structure as traditionally perceived. The tip clearance vortex is formed by multiple interlaced vorticities. Therefore, the tip clearance vortex is inherently unsteady. The multiple interlaced vortices never roll up to form a single structure. When phased-averaged, the tip clearance vortex appears as a single structure. When flow rate is reduced with the same tip gap, the tip clearance vortex rolls further upstream and the tip clearance vortex moves further radially inward and away from the suction side of the blade. When the tip gap size is increased at the design flow condition, the overall tip clearance vortex becomes stronger and it stays closer to the blade suction side and the vortex core extends all the way to the exit of the blade passage. Measured and calculated unsteady flow fields inside the tip gap agree fairly well. Instantaneous velocity vectors inside the tip gap from both the PIV and LES do show flow separation and reattachment at the entrance of tip gap as some earlier studies suggested. This area at the entrance of tip gap flow (the pressure side of the blade) is confined very close to the rotor tip section. With a small tip gap (0.5mm), the gap flow looks like a simple two-dimensional channel flow with larger velocity near the casing for both flow rates. A small area with a sharp velocity gradient is observed just above the rotor tip. This strong shear layer is turned radially inward when it collides with the incoming flow and forms the core structure of the tip clearance vortex. When tip gap size is increased to 2.4 mm at the design operation, the radial profile of the tip gap flow changes drastically. With the large tip gap, the gap flow looks like a two-dimensional channel flow only near the casing. Near the rotor top section, a bigger region with very large shear and reversed flow is observed.

Fundraising Tips.

ERIC Educational Resources Information Center

Miller, Don

1989-01-01

Offers criteria to solicit funds from an individual, corporation, or foundation. Lists types of fundraising appeals. Outlines three fundraising campaigns (dance-a-thon, car wash, and alumni night) that were used to solicit individual donors in the community. (PRA)

The TIPS Evaluation Project: A Theory-Driven Approach to Dissemination Research.

ERIC Educational Resources Information Center

Mulvey, Kevin P.; Hayashi, Susan W.; Hubbard, Susan M.; Kopstien, Andrea; Huang, Judy Y.

2003-01-01

Introduces the special section that focuses on four major studies under the treatment improvement protocols (TIPs) evaluation project. Provides an overview of each article, and addresses the value of using a theory-driven approach to dissemination research. (SLD)

On the development of a magnetoresistive sensor for blade tip timing and blade tip clearance measurement systems

NASA Astrophysics Data System (ADS)

Tomassini, R.; Rossi, G.; Brouckaert, J.-F.

2014-05-01

The accurate control of the gap between static and rotating components is vital to preserve the mechanical integrity and ensure a correct functioning of any rotating machinery. Moreover, tip leakage above the airfoil tip results in relevant aerodynamic losses. One way to measure and to monitor blade tip gaps is by the so-called Blade Tip Clearance (BTC) technique. Another fundamental phenomenon to control in the turbomachines is the vibration of the blades. For more than half a century, this has been performed by installing strain gauges on the blades and using telemetry to transmit the signals. The Blade Tip Timing (BTT) technique, (i.e. measuring the blade time of arrival from the casing at different angular locations with proximity sensors) is currently being adopted by all manufacturers as a replacement for the classical strain gauge technique because of its non-intrusive character. This paper presents a novel magnetoresistive sensor for blade tip timing and blade tip clearance systems, which offers high temporal and high spatial resolution simultaneously. The sensing element adopted is a Wheatstone bridge of Permalloy elements. The principle of the sensor is based on the variation of magnetic field at the passage of ferromagnetic objects. Two different configurations have been realized, a digital and an analogue sensor. Measurements of tip clearance have been performed in an high speed compressor and the calibration curve is reported. Measurements of blade vibration have been carried out in a dedicated calibration bench; results are presented and discussed. The magnetoresistive sensor is characterized by high repeatability, low manufacturing costs and measurement accuracy in line with the main probes used in turbomachinery testing. The novel sensor has great potential and is capable of fulfilling the requirements for a simultaneous BTC and BTT measurement system.

Osteoconduction of impacted porous titanium particles with a calcium-phosphate coating is comparable to osteoconduction of impacted allograft bone particles: in vivo study in a nonloaded goat model.

PubMed

Walschot, Lucas H B; Aquarius, René; Schreurs, Barend W; Verdonschot, Nico; Buma, Pieter

2012-08-01

Impaction grafting restores bone defects in hip arthroplasty. Defects are reconstructed with bone particles (BoP) as substitute materials with adequate mechanical and biological properties are not yet available. Ceramic particles (CeP) have mechanical drawbacks as opposed to porous titanium particles (TiP). In this in vivo study, bone ingrowth and bone volume in coated and noncoated TiP were compared to porous biphasic calcium-phospate CeP and allograft BoP. Coatings consisted of silicated calcium-phosphate and carbonated apatite. Materials were implanted in goats and impacted in cylindrical defects (diameter 8 mm) in the cancellous bone of the femur. On the basis of fluorochrome labeling and histology, bone ingrowth distance was measured at 4, 8, and 12 weeks. Cross-sectional bone area was measured at 12 weeks. TiP created a coherent matrix of entangled particles. CeP pulverized and were noncoherent. Bone ingrowth in TiP improved significantly by the coatings to levels comparable to BoP and CeP. Cross-sectional bone area was smaller in CeP and TiP compared to BoP. The osteoconductive properties of impacted TiP with a calcium-phosphate coating are comparable to impacted allograft bone and impacted biphasic ceramics. A more realistic loaded in vivo study should prove that coated TiP is an attractive alternative to allograft bone. Copyright © 2012 Wiley Periodicals, Inc.

Energy dissipation in the blade tip region of an axial fan

NASA Astrophysics Data System (ADS)

Bizjan, B.; Milavec, M.; Širok, B.; Trenc, F.; Hočevar, M.

2016-11-01

A study of velocity and pressure fluctuations in the tip clearance flow of an axial fan is presented in this paper. Two different rotor blade tip designs were investigated: the standard one with straight blade tips and the modified one with swept-back tip winglets. Comparison of integral sound parameters indicates a significant noise level reduction for the modified blade tip design. To study the underlying mechanisms of the energy conversion and noise generation, a novel experimental method based on simultaneous measurements of local flow velocity and pressure has also been developed and is presented here. The method is based on the phase space analysis by the use of attractors, which enable more accurate identification and determination of the local flow structures and turbulent flow properties. Specific gap flow energy derived from the pressure and velocity time series was introduced as an additional attractor parameter to assess the flow energy distribution and dissipation within the phase space, and thus determines characteristic sources of the fan acoustic emission. The attractors reveal a more efficient conversion of the pressure to kinetic flow energy in the case of the modified (tip winglet) fan blade design, and also a reduction in emitted noise levels. The findings of the attractor analysis are in a good agreement with integral fan characteristics (efficiency and noise level), while offering a much more accurate and detailed representation of gap flow phenomena.

Two-Stage Fan I: Aerodynamic and Mechanical Design

NASA Technical Reports Server (NTRS)

Messenger, H. E.; Kennedy, E. E.

1972-01-01

A two-stage, highly-loaded fan was designed to deliver an overall pressure ratio of 2.8 with an adiabatic efficiency of 83.9 percent. At the first rotor inlet, design flow per unit annulus area is 42 lbm/sec/sq ft (205 kg/sec/sq m), hub/tip ratio is 0.4 with a tip diameter of 31 inches (0.787 m), and design tip speed is 1450 ft/sec (441.96 m/sec). Other features include use of multiple-circular-arc airfoils, resettable stators, and split casings over the rotor tip sections for casing treatment tests.

Shock isolator for operating a diode laser on a closed-cycle refrigerator

NASA Technical Reports Server (NTRS)

Jennings, D. E. (Inventor)

1979-01-01

A diode laser mounted within a helium refrigerator is mounted using a braided copper ground strap which provides good impact shock isolation from the refrigerator cold-tip while also providing a good thermal link to the cold-tip. The diode mount also contains a rigid stand-off assembly consisting of alternate sections of nylon and copper which serve as cold stations to improve thermal isolation from the vaccum housing mounting structure. Included in the mount is a Pb-In alloy wafer inserted between the cold-tip and the diode to damp temperature fluctuations occurring at the cold-tip.

Nutrition - Multiple Languages

MedlinePlus

... for Refugees and Immigrants Arabic (العربية) Expand Section Choose MyPlate: 10 Tips to a Great Plate - English PDF Choose MyPlate: 10 Tips to a Great Plate - العربية (Arabic) PDF Center for Nutrition Policy and ...

Writing with a Personal Voice.

ERIC Educational Resources Information Center

Rico, Gabriele Lusser

1985-01-01

Clustering is a nonlinear brainstorming technique that can encourage children's natural writing ability by helping them draw on their need to make patterns out of their experience. Tips for introducing cluster writing into the classroom are offered. (MT)

An Administrator's Self-Esteem Is Key to Effective Delegation.

ERIC Educational Resources Information Center

Armenta, Anthony D.; Reno, Thomas R.

1991-01-01

Argues that administrative effectiveness requires delegation; that delegation is a learned skill; and that low self-esteem and weak delegation skills are closely related. Summarizes literature offering warnings and tips about delegation. (DMM)

CSC Tip Sheets: Working with Students

EPA Pesticide Factsheets

Work with students, individually or in teams, who are a volunteer workforce that offers resources to implement projects. In turn, these students are given a valuable hands-on learning experience, academic credit, and a career boost.

Cheap Words: A Paperback Dictionary Roundup.

ERIC Educational Resources Information Center

Kister, Ken

1979-01-01

Surveys currently available paperback editions in three classes of dictionaries: collegiate, abridged, and pocket. A general discussion distinguishes among the classes and offers seven consumer tips, followed by an annotated listing of dictionaries now available. (SW)

Maximizing Meetings: Plan to Be Productive

ERIC Educational Resources Information Center

Hughes, Michelle

2008-01-01

Responsible for calling meetings? Dread the thought of attending another meeting that misses the mark and wastes everyone's time? This article offers tips to improve the effectiveness of meetings by planning their structure. (Contains 2 tables.)

How the medical practice employee can get more from continuing education programs.

PubMed

Hills, Laura Sachs

2007-01-01

Continuing education can be a win-win situation for the medical practice employee and for the practice. However, in order education programs must become informed consumers of such programs. They must know how to select the right educational programs for their needs and maximize their own participation. Employees who attend continuing education programs without preparation may not get the full benefit from their experiences. This article suggests benchmarks to help determine whether a continuing education program is worthwhile and offers advice for calculating the actual cost of any continuing education program. It provides a how-to checklist for medical practice employees so they know how to get the most out of their continuing education experience before, during, and after the program. This article also suggests using a study partner system to double educational efforts among employees and offers 10 practical tips for taking and using notes at a continuing education program. Finally, this article outlines the benefits of becoming a regular student and offers three practical tips for maximizing the employee's exhibit hall experience.

Fusion of electromagnetic trackers to improve needle deflection estimation: simulation study.

PubMed

Sadjadi, Hossein; Hashtrudi-Zaad, Keyvan; Fichtinger, Gabor

2013-10-01

We present a needle deflection estimation method to anticipate needle bending during insertion into deformable tissue. Using limited additional sensory information, our approach reduces the estimation error caused by uncertainties inherent in the conventional needle deflection estimation methods. We use Kalman filters to combine a kinematic needle deflection model with the position measurements of the base and the tip of the needle taken by electromagnetic (EM) trackers. One EM tracker is installed on the needle base and estimates the needle tip position indirectly using the kinematic needle deflection model. Another EM tracker is installed on the needle tip and estimates the needle tip position through direct, but noisy measurements. Kalman filters are then employed to fuse these two estimates in real time and provide a reliable estimate of the needle tip position, with reduced variance in the estimation error. We implemented this method to compensate for needle deflection during simulated needle insertions and performed sensitivity analysis for various conditions. At an insertion depth of 150 mm, we observed needle tip estimation error reductions in the range of 28% (from 1.8 to 1.3 mm) to 74% (from 4.8 to 1.2 mm), which demonstrates the effectiveness of our method, offering a clinically practical solution.

23 CFR 450.330 - Project selection from the TIP.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 23 Highways 1 2013-04-01 2013-04-01 false Project selection from the TIP. 450.330 Section 450.330 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.330 Project selection...

23 CFR 450.330 - Project selection from the TIP.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 23 Highways 1 2012-04-01 2012-04-01 false Project selection from the TIP. 450.330 Section 450.330 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.330 Project selection...

23 CFR 450.330 - Project selection from the TIP.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 23 Highways 1 2014-04-01 2014-04-01 false Project selection from the TIP. 450.330 Section 450.330 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.330 Project selection...

Health Information in Thai (ภาษาไทย)

MedlinePlus

... Disease Control and Prevention N Expand Section Nutrition Choose MyPlate: 10 Tips to a Great Plate - English PDF Choose MyPlate: 10 Tips to a Great Plate - ภาษาไทย (Thai) PDF Center for Nutrition Policy and ...

23 CFR 450.330 - Project selection from the TIP.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 23 Highways 1 2011-04-01 2011-04-01 false Project selection from the TIP. 450.330 Section 450.330 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.330 Project selection...

Root elongation against a constant force: experiment with a computerized feedback-controlled device

NASA Technical Reports Server (NTRS)

Kuzeja, P. S.; Lintilhac, P. M.; Wei, C.

2001-01-01

Axial force was applied to the root tip of corn (Zea mays L. cv. Merit) seedlings using a computerized, feedback-controlled mechanical device. The system's feedback capability allowed continuous control of a constant tip load, and the attached displacement transducer provided the time course of root elongation. Loads up to 7.5 g decreased the root elongation rate by 0.13 mm h-1 g-1, but loads 7.5 to 17.5 g decreased the growth rate by only 0.04 mm h-1 g-1. Loads higher than 18 g stopped root elongation completely. Measurement of the cross-sectional areas of the root tips indicated that the 18 g load had applied about 0.98 MPa of axial pressure to the root, thereby exceeding the root's ability to respond with increased turgor pressure. Recorded time-lapse images of loaded roots showed that radial thickening (swelling) occurred behind the root cap, whose cross-sectional area increased with tip load.

User's manual for the National Water Information Systemof the U.S. Geological Survey Water-Quality System

USGS Publications Warehouse

Gellenbeck, Dorinda J.; Oblinger, Carolyn J.; Runkle, Donna L.; Schertz, Terry L.; Scott, Jonathon C.; Stoker, Yvonne E.; Taylor, Robert L.

2006-01-01

This user documentation is designed to be a reference for the Water-Quality System (QWDATA) within the National Water Information System (NWIS). For the new user, the 'Introduction' and 'Getting Started' sections are the recommended places to begin. The experienced user may want to go straight to the details provided in the program section (section 3). Code lists and some miscellaneous reference materials are provided in the Appendices. The last section, 'Tip Sheets,' is a collection of suggestions for accomplishing selected tasks, some of which are basic and some of which are advanced. Where appropriate, these Tip Sheets are referenced in the main text of the documentation.

User's manual for the National Water Information System of the U.S. Geological Survey (USGS), Water-quality System (QWDATA)

USGS Publications Warehouse

Gellenbeck, Dorinda; Oblinger, Carolyn J.; Runkle, Donna L.; Schertz, Terry L.; Scott, Jonathon C.; Taylor, Robert L.

2005-01-01

This user documentation is designed to be a reference for the Water-Quality System (QWDATA) within the National Water Information System (NWIS). For the new user, the 'Introduction' and 'Getting Started' sections are the recommended places to begin. The experienced user may want to go straight to the details provided in the program section (section 3). Code lists and some miscellaneous reference materials are provided in the Appendices. The last section, 'Tip Sheets,' is a collection of suggestions for accomplishing selected tasks, some of which are basic and some of which are advanced. Where appropriate, these Tip Sheets are referenced in the main text of the documentation.

A Scalable Heuristic for Viral Marketing Under the Tipping Model

DTIC Science & Technology

2013-09-01

removal of high-degree nodes. The rest of the paper is organized as follows. In Section 2, we provide formal definitions of the tipping model. This is...that must be activated for it to become activate as well. A Scalable Heuristic for Viral Marketing Under the Tipping Model 3 Definition 1 (Threshold...returns a set of active nodes after one time step. Definition 2 (Activation Function) Given a threshold function, θ, an ac- tivation function Aθ maps

TAKING IT TO THE PEWS: A CBPR-GUIDED HIV AWARENESS AND SCREENING PROJECT WITH BLACK CHURCHES

PubMed Central

Berkley-Patton, Jannette; Bowe-Thompson, Carole; Bradley-Ewing, Andrea; Hawes, Starlyn; Moore, Erin; Williams, Eric; Martinez, David; Goggin, Kathy

2014-01-01

Utilizing a community-based participatory research (CBPR) approach is a potentially effective strategy for exploring the development, implementation, and evaluation of HIV interventions in African American churches. This CBPR-guided study describes a church-based HIV awareness and screening intervention (Taking It to the Pews [TIPS]) that fully involved African American church leaders in all phases of the research project. Findings from the implementation and evaluation phases indicated that church leaders delivered TIPS Tool Kit activities on an ongoing basis (about twice a month) over a 9-month period. TIPS church members were highly exposed to TIPS activities (e.g., 91% reported receiving HIV educational brochures, 84% heard a sermon about HIV). Most (87%) believed that the church should talk about HIV, and 77% believed that the church should offer HIV screening. These findings suggest that implementing an HIV intervention in Black church settings is achievable, particularly when a CBPR approach is used. PMID:20528130

Resonant antenna probes for tip-enhanced infrared near-field microscopy.

PubMed

Huth, Florian; Chuvilin, Andrey; Schnell, Martin; Amenabar, Iban; Krutokhvostov, Roman; Lopatin, Sergei; Hillenbrand, Rainer

2013-03-13

We report the development of infrared-resonant antenna probes for tip-enhanced optical microscopy. We employ focused-ion-beam machining to fabricate high-aspect ratio gold cones, which replace the standard tip of a commercial Si-based atomic force microscopy cantilever. Calculations show large field enhancements at the tip apex due to geometrical antenna resonances in the cones, which can be precisely tuned throughout a broad spectral range from visible to terahertz frequencies by adjusting the cone length. Spectroscopic analysis of these probes by electron energy loss spectroscopy, Fourier transform infrared spectroscopy, and Fourier transform infrared near-field spectroscopy corroborates their functionality as resonant antennas and verifies the broad tunability. By employing the novel probes in a scattering-type near-field microscope and imaging a single tobacco mosaic virus (TMV), we experimentally demonstrate high-performance mid-infrared nanoimaging of molecular absorption. Our probes offer excellent perspectives for optical nanoimaging and nanospectroscopy, pushing the detection and resolution limits in many applications, including nanoscale infrared mapping of organic, molecular, and biological materials, nanocomposites, or nanodevices.

Media--it takes more than flipping a switch.

PubMed

Miller, J

1980-01-01

Choosing the right audiovisual media for a health education program involves a variety of considerations, not the least of which is budget. The following article offers tips on making an informed, intelligent selection of media programs.

Dry Mouth Treatment: Tips for Controlling Dry Mouth

MedlinePlus

... Dry Mouth Mouthwash, which also offer protection against tooth decay. Avoid using over-the-counter antihistamines and decongestants ... and drinks because they increase your risk of tooth decay. Brush with a fluoride toothpaste — ask your dentist ...

Talking With Your College-Bound Young Adult About Alcohol

MedlinePlus

... college your young adult will be attending for materials that offer tips on maintaining contact with students ... Fall semester— A time for parents to revisit discussions about college drinking. Rockville, MD. 3 2009– 2011 ...

Time management tips, tricks, and exercises for busy medical practice employees.

PubMed

Hills, Laura

2012-01-01

Working in a busy medical practice requires excellent time management skills and an ability to handle those unanticipated emergencies, urgencies, and monkey-wrenches that can and often do throw a well-planned day out of whack. This article offers busy medical practice employees 50 time management tips to help them manage their time well. It focuses specifically on eliminating time wasters, working more efficiently, and developing personal goals and habits that can increase productivity, reduce stress, and make working in the practice more enjoyable. This article also offers several hands-on time management exercises, including a time management self-assessment quiz, a multitasking exercise, and a time drain exercise. These can be completed individually or collaboratively with other members of the medical practice team. Finally, this article explores 12 popular time management myths and how a medical practice employee can increase his or her productivity by identifying and harnessing his or her productivity "happy hour(s)".

A new aeroelastic model for composite rotor blades with straight and swept tips

NASA Technical Reports Server (NTRS)

Yuan, Kuo-An; Friedmann, Peretz P.; Venkatesan, Comandur

1992-01-01

An analytical model for predicting the aeroelastic behavior of composite rotor blades with straight and swept tips is presented. The blade is modeled by beam type finite elements along the elastic axis. A single finite element is used to model the swept tip. The nonlinear equations of motion for the finite element model are derived using Hamilton's principle and based on a moderate deflection theory and accounts for: arbitrary cross-sectional shape, pretwist, generally anisotropic material behavior, transverse shears and out-of-plane warping. Numerical results illustrating the effects of tip sweep, anhedral and composite ply orientation on blade aeroelastic behavior are presented. Tip sweep can induce aeroelastic instability by flap-twist coupling. Tip anhedral causes lag-torsion and flap-axial couplings, however, its effects on blade stability is less pronounced than the effect due to sweep. Composite ply orientation has a substantial effect on blade stability.

Nonlinear Aerodynamics and the Design of Wing Tips

NASA Technical Reports Server (NTRS)

Kroo, Ilan

1991-01-01

The analysis and design of wing tips for fixed wing and rotary wing aircraft still remains part art, part science. Although the design of airfoil sections and basic planform geometry is well developed, the tip regions require more detailed consideration. This is important because of the strong impact of wing tip flow on wing drag; although the tip region constitutes a small portion of the wing, its effect on the drag can be significant. The induced drag of a wing is, for a given lift and speed, inversely proportional to the square of the wing span. Concepts are proposed as a means of reducing drag. Modern computational methods provide a tool for studying these issues in greater detail. The purpose of the current research program is to improve the understanding of the fundamental issues involved in the design of wing tips and to develop the range of computational and experimental tools needed for further study of these ideas.

75 FR 66737 - Technology Innovation Program (TIP) Seeks Comments on White Papers

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-29

... institutions of higher education or other organizations, such as national laboratories and nonprofit research...-reward research in areas of critical national need. The TIP statutory authority is Section 3012 of the America Creating Opportunities to Meaningfully Promote Excellence in Technology, Education, and Science...

23 CFR 450.326 - TIP revisions and relationship to the STIP.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 23 Highways 1 2014-04-01 2014-04-01 false TIP revisions and relationship to the STIP. 450.326 Section 450.326 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.326...

23 CFR 450.326 - TIP revisions and relationship to the STIP.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 23 Highways 1 2013-04-01 2013-04-01 false TIP revisions and relationship to the STIP. 450.326 Section 450.326 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.326...

23 CFR 450.326 - TIP revisions and relationship to the STIP.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 23 Highways 1 2012-04-01 2012-04-01 false TIP revisions and relationship to the STIP. 450.326 Section 450.326 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.326...

40 CFR 93.118 - Criteria and procedures: Motor vehicle emissions budget.

Code of Federal Regulations, 2010 CFR

2010-07-01

... emissions budget. 93.118 Section 93.118 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... and procedures: Motor vehicle emissions budget. (a) The transportation plan, TIP, and project not from a conforming transportation plan and TIP must be consistent with the motor vehicle emissions budget...

23 CFR 450.326 - TIP revisions and relationship to the STIP.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 23 Highways 1 2010-04-01 2010-04-01 false TIP revisions and relationship to the STIP. 450.326 Section 450.326 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.326...

23 CFR 450.326 - TIP revisions and relationship to the STIP.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 23 Highways 1 2011-04-01 2011-04-01 false TIP revisions and relationship to the STIP. 450.326 Section 450.326 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PLANNING AND RESEARCH PLANNING ASSISTANCE AND STANDARDS Metropolitan Transportation Planning and Programming § 450.326...

21 CFR 880.6025 - Absorbent tipped applicator.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Absorbent tipped applicator. 880.6025 Section 880.6025 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GENERAL HOSPITAL AND PERSONAL USE DEVICES General Hospital and Personal Use Miscellaneous...

21 CFR 880.6025 - Absorbent tipped applicator.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Absorbent tipped applicator. 880.6025 Section 880.6025 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GENERAL HOSPITAL AND PERSONAL USE DEVICES General Hospital and Personal Use Miscellaneous...

21 CFR 880.6025 - Absorbent tipped applicator.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Absorbent tipped applicator. 880.6025 Section 880.6025 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GENERAL HOSPITAL AND PERSONAL USE DEVICES General Hospital and Personal Use Miscellaneous...

21 CFR 880.6025 - Absorbent tipped applicator.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Absorbent tipped applicator. 880.6025 Section 880.6025 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GENERAL HOSPITAL AND PERSONAL USE DEVICES General Hospital and Personal Use Miscellaneous...

Application of two-dimensional unsteady aerodynamic to a free-tip rotor response analysis

NASA Technical Reports Server (NTRS)

Yates, L.; Kumagai, H.

1985-01-01

The free-tip rotor utilizes a rotor blade tip which is structurally decoupled from the blade inboard section. The tip is free to pitch about its own pitch axis to respond to the local flow angularity changes. The tip also experiences the heaving motion due to the flapping of the rotor blade. For an airfoil in any pitching and heaving motion which can be expanded into a Fourier series, the lift and moment calculated by Theodoren's theory is simply the linear combination of the lift and moment calculated for each harmonic. These lift and moment are then used to determine the response of the free-tip rotor. A parametric study is performed to determine the effect of mechanical damping, mechanical spring, sweep, friction, and a constant control moment on the free-tip rotor response characteristics and the resulting azimuthal lift distributions. The results showed that the free-tip has the capability to suppress the oscillatory lift distribution around the azimuth and to eliminate a significant negative life peak on the advancing tip. This result agrees with the result of the previous analysis based on the steady aerodynamics.

Reasons for low aerodynamic performance of 13.5-centimeter-tip-diameter aircraft engine starter turbine

NASA Technical Reports Server (NTRS)

Haas, J. E.; Roelke, R. J.; Hermann, P.

1981-01-01

The reasons for the low aerodynamic performance of a 13.5 cm tip diameter aircraft engine starter turbine were investigated. Both the stator and the stage were evaluated. Approximately 10 percent improvement in turbine efficiency was obtained when the honeycomb shroud over the rotor blade tips was filled to obtain a solid shroud surface. Efficiency improvements were obtained for three rotor configurations when the shroud was filled. It is suggested that the large loss associated with the open honeycomb shroud is due primarily to energy loss associated with gas transportation as a result of the blade to blade pressure differential at the tip section.

Field enhanced graphene based dual hexagonal ring optical antenna for tip-enhanced spectroscopy

NASA Astrophysics Data System (ADS)

Aditya, Rachakonda A. N. S.; Thampy, Anand Sreekantan

2018-05-01

Field enhanced graphene based dual hexagonal ring optical antenna has been designed in IR regime. Outcomes of hexagonal rings with gold and graphene materials and their effect has been studied and analyzed. Graphene based structures are found to have better and enhanced results as compared to that of gold. In addition, a two fold increase in bandwidth (∼30 THz) and cross-section (∼6.00E+06 nm2) has been observed in case of graphene. Field patterns for various tip/corner curvatures are simulated and localized/regional field patterns are justified. The effect of inter ring spacing on absorption cross section has been studied for every 10 nm increase in spacing. This absorption enhancement in addition to field localization makes the current structure feasible for tip enhanced spectroscopy.

Tracking Blade Tip Vortices for Numerical Flow Simulations of Hovering Rotorcraft

NASA Technical Reports Server (NTRS)

Kao, David L.

2016-01-01

Blade tip vortices generated by a helicopter rotor blade are a major source of rotor noise and airframe vibration. This occurs when a vortex passes closely by, and interacts with, a rotor blade. The accurate prediction of Blade Vortex Interaction (BVI) continues to be a challenge for Computational Fluid Dynamics (CFD). Though considerable research has been devoted to BVI noise reduction and experimental techniques for measuring the blade tip vortices in a wind tunnel, there are only a handful of post-processing tools available for extracting vortex core lines from CFD simulation data. In order to calculate the vortex core radius, most of these tools require the user to manually select a vortex core to perform the calculation. Furthermore, none of them provide the capability to track the growth of a vortex core, which is a measure of how quickly the vortex diffuses over time. This paper introduces an automated approach for tracking the core growth of a blade tip vortex from CFD simulations of rotorcraft in hover. The proposed approach offers an effective method for the quantification and visualization of blade tip vortices in helicopter rotor wakes. Keywords: vortex core, feature extraction, CFD, numerical flow visualization

Experimental Verification of the Streamline Curvature Numerical Analysis Method Applied to the Flow through an Axial Flow Fan.

DTIC Science & Technology

1980-05-28

Total Deviation Angles and Measured Inlet Axial Velocity . . . . 55 ix LIST OF FIGURES (Continued) Figure Page 19 Points Defining Blade Sections of...distance from leading edge to point of maximum camber along chord line ar tip vortex core radius AVR axial velocity ratio (Vx /V x c chord length CL tip...yaw ceoefficient d longitudinal distance from leading edge to tip vortex calculation point G distance from chord line to maximum camber point K cascade

5 CFR 532.283 - Special wage schedules for nonappropriated fund tipped employees classified as waiter/waitress.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Special wage schedules for nonappropriated fund tipped employees classified as waiter/waitress. 532.283 Section 532.283 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS PREVAILING RATE SYSTEMS Prevailing Rate...

Spleen stiffness is positively correlated with HVPG and decreases significantly after TIPS implantation.

PubMed

Buechter, Matthias; Manka, Paul; Theysohn, Jens M; Reinboldt, Marcus; Canbay, Ali; Kahraman, Alisan

2018-01-01

Transjugular intrahepatic portosystemic shunt (TIPS) is indicated in patients with decompensated portal hypertension (PH). Hepatic venous pressure gradient (HVPG) is considered gold standard for assessment of PH. Because HVPG measurement is invasive, non-invasive methods for evaluating severity of PH are warranted. We retrospectively correlated spleen stiffness as measured by FibroScan with HVPG in patients who underwent TIPS. Twenty-four patients with spleen stiffness measurement (SSM) one day before (D-1), one day after (D+1) and 28 days after TIPS (D+28) were included. SSM was positively correlated with pre-TIPS HVPG (HVPG <13mmHg, median SSM: 19.7±8.6kPa; HVPG 13-24mmHg, median SSM: 45.0±15.7kPa; HVPG >24mmHg, median SSM: 75.0±6.2kPa; p<0.05]; r 2 =0.72; p<0.001) and decreased significantly after TIPS implantation (D-1, median SSM: 67.1±17.3kPa; D+1, median SSM: 44.7±18.5kPa; D+28, median SSM: 35.6±17.0kPa; p<0.05), while liver stiffness measurement decrease was not statistically significant. Our study highlights the utility of SSM as non-invasive tool in patients with chronic liver disease in evaluating degree of PH potentially offering a confirmable additional parameter in surveillance of patients undergoing TIPS procedure. Copyright © 2017 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.

Ten Tips for Leadership.

ERIC Educational Resources Information Center

Howe, Eleanor B.

2001-01-01

Discusses ten attributes of leadership and offers suggestions for school librarians to implement them. Highlights include communicating vision and ideas; ethical values and integrity; self-awareness and self-knowledge; context; cooperation; diverse skills and flexibility; organizational development; personal growth; and taking action. (LRW)

Making Connections: Power at Your Fingertips. Resources in Technology.

ERIC Educational Resources Information Center

Deal, Walter F., III

1997-01-01

Discusses inventions and innovations in battery technology. Includes information about batteries that have produced products such as cellular telephones, portable computers, and camcorders. Also describes lithium and solid state batteries and offers tips on battery safety. (JOW)

Ten Things Lesbians Should Discuss with Their Health Care Provider

MedlinePlus

... for high blood pressure, cholesterol problems, and diabetes. Health care providers can also offer tips on quitting smoking, ... lesbians experience violence in their intimate relationships. However, health care providers do not ask lesbians about intimate partner ...

Building Security into Schools.

ERIC Educational Resources Information Center

Kosar, John E.; Ahmed, Faruq

2000-01-01

Offers tips for redesigning safer school sites; installing and implementing security technologies (closed-circuit television cameras, door security hardware, electronic security panels, identification cards, metal detectors, and panic buttons); educating students and staff about security functions; and minimizing costs via a comprehensive campus…

The African Origin of Complex Projectile Technology: An Analysis Using Tip Cross-Sectional Area and Perimeter

PubMed Central

Sisk, Matthew L.; Shea, John J.

2011-01-01

Despite a body of literature focusing on the functionality of modern and stylistically distinct projectile points, comparatively little attention has been paid to quantifying the functionality of the early stages of projectile use. Previous work identified a simple ballistics measure, the Tip Cross-Sectional Area, as a way of determining if a given class of stone points could have served as effective projectile armatures. Here we use this in combination with an alternate measure, the Tip Cross-Sectional Perimeter, a more accurate proxy of the force needed to penetrate a target to a lethal depth. The current study discusses this measure and uses it to analyze a collection of measurements from African Middle Stone Age pointed stone artifacts. Several point types that were rejected in previous studies are statistically indistinguishable from ethnographic projectile points using this new measure. The ramifications of this finding for a Middle Stone Age origin of complex projectile technology is discussed. PMID:21755048

Methods for Improving the Curvature of Steerable Needles in Biological Tissue

PubMed Central

Adebar, Troy K.; Greer, Joseph D.; Laeseke, Paul F.; Hwang, Gloria L.; Okamura, Allison M.

2016-01-01

Robotic needle steering systems have the potential to improve percutaneous interventions such as radiofrequency ablation of liver tumors, but steering techniques described to date have not achieved sufficiently small radius of curvature in biological tissue to be relevant to this application. In this work, the impact of tip geometry on steerable needle curvature is examined. Finite-element simulations and experiments with bent-tip needles in ex vivo liver tissue demonstrate that selection of tip length and angle can greatly improve curvature, with radius of curvature below 5 cm in liver tissue possible through judicious selection of these parameters. Motivated by the results of this analysis, a new articulated-tip steerable needle is described, in which a distal section is actively switched by a robotic system between a straight tip (resulting in a straight path) and a bent tip (resulting in a curved path). This approach allows the tip length and angle to be increased, while the straight configuration allows the needle tip to still pass through an introducer sheath and rotate inside the body. Validation testing in liver tissue shows that the new articulated-tip steerable needle achieves smaller radius of curvature compared to bent-tip needles described in previous work. Steerable needles with optimized tip parameters, which can generate tight curves in liver tissue, increase the clinical relevance of needle steering to percutaneous interventions. PMID:26441438

Rotor with Flattened Exit Pressure Profile

NASA Technical Reports Server (NTRS)

Baltas, Constantine (Inventor); Prasad, Dilip (Inventor); Gallagher, Edward J. (Inventor)

2015-01-01

A rotor blade comprises an airfoil extending radially from a root section to a tip section and axially from a leading edge to a trailing edge, the leading and trailing edges defining a curvature therebetween. The curvature determines a relative exit angle at a relative span height between the root section and the tip section, based on an incident flow velocity at the leading edge of the airfoil and a rotational velocity at the relative span height. In operation of the rotor blade, the relative exit angle determines a substantially flat exit pressure ratio profile for relative span heights from 75% to 95%, wherein the exit pressure ratio profile is constant within a tolerance of 10% of a maximum value of the exit pressure ratio profile.

SECTION O, SHOWING FLAT MARKERS, WITH SECTIONS K AND L ...

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

SECTION O, SHOWING FLAT MARKERS, WITH SECTIONS K AND L IN BACKGROUND. VIEW TO SOUTH. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

Characterization of the Interaction between the Salmonella Type III Secretion System Tip Protein SipD and the Needle Protein PrgI by Paramagnetic Relaxation Enhancement*

PubMed Central

Rathinavelan, Thenmalarchelvi; Tang, Chun; De Guzman, Roberto N.

2011-01-01

Many Gram-negative bacteria that cause major diseases and mortality worldwide require the type III secretion system (T3SS) to inject virulence proteins into their hosts and cause infections. A structural component of the T3SS is the needle apparatus, which consists of a base, an external needle, and a tip complex. In Salmonella typhimurium, the external needle is assembled by the polymerization of the needle protein PrgI. On top of this needle sits a tip complex, which is partly formed by the tip protein SipD. How SipD interacts with PrgI during the assembly of the T3SS needle apparatus remains unknown. The central region of PrgI forms an α-helical hairpin, whereas SipD has a long central coiled-coil, which is a defining structural feature of other T3SS tip proteins as well. Using NMR paramagnetic relaxation enhancement, we have identified a specific region on the SipD coiled-coil that interacts directly with PrgI. We present a model of how SipD might dock at the tip of the needle based on our paramagnetic relaxation enhancement results, thus offering new insight about the mechanism of assembly of the T3SS needle apparatus. PMID:21138848

End Sexual Harassment of Employees, or Your Board Could Be Held Liable.

ERIC Educational Resources Information Center

Underwood, Julie

1987-01-01

Defines sexual harassment and reminds school boards of their moral and legal obligation to protect employees and maintain an intimidation-free workplace. Offers several tips for preventing sexual harrassment and for launching investigations into complaints. (MLH)

Teaching Typography.

ERIC Educational Resources Information Center

Communication: Journalism Education Today, 1998

1998-01-01

Outlines nine objectives students should be able to accomplish after completing the activities in the unit on typography presented in the previous articles in this journal. Offers eight tips for teaching typography. Includes a short list of books about typography and a list of seven organizations. (SR)

The medium is the message: thoughts on picture perfect presentation.

PubMed

Jupiter, Daniel C

2013-01-01

Clear presentation of results leads to easier interpretation and appreciation by readers. Opinions and tips are offered to ease clear communication. Copyright © 2013 American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

Evaluation of hollow fiberoptic tips for the conduction of Er:YAG laser.

PubMed

Alves, Paulo Roberto Vieira; Aranha, Norberto; Alfredo, Edson; Marchesan, Melissa Andréia; Brugnera Junior, Aldo; Sousa-Neto, Manoel D

2005-08-01

The use of Er:YAG laser operating in the 3 microm range with adjustable power and pulses has become popular for dental and medical practice due to its high photoablative capacity, surgical precision and antimicrobial action. The existing fiberoptic tips irradiate lasers parallel to the long axes of the tooth limiting its efficiency in the root canal. We evaluated hollow fiberoptic tips obtained from silicate glass as a means of Er:YAG laser conduction in dental procedures. The fiber tips were molded from capillary tubes with different profiles so that their ends would have cylindric, conical or spherical shapes. The performance of the three fibers as a means of propagation of Er:YAG (lambda = 2.94 microm) laser radiation was compared to that of a solid sapphire fiber at 10 Hz and 200 mJ and of 20 Hz and 500 mJ. The profiles of frontal and lateral burning were visualized on thermal paper. Analysis of these profiles demonstrated that the sapphire tip and the hollow fiber of cylindric section did not differ significantly in the profiles of frontal burning, and no lateral burning was detected. The fibers of the conical and spherical sections, although presenting attenuation in the frontal output power, showed a larger burning area in the frontal profile, in addition to producing lateral burning. The results indicate that commercial hollow fiberoptics have advantages such as easy manufacture of the different tip shapes, great adaptability, low cost, and a low loss of transmission.

Saving Money On Meds Cut your Rx costs with these tips.

PubMed

Calandra, Robert

2016-11-01

With insurance deductibles and co-pays rising for some prescription medications and supplies, staying healthy is becoming more expensive for people with diabetes. But there are ways to trim costs without skimping on necessities. Start by being proactive and candid with your providers. Let your doctor, pharmacist, and diabetes educator know if there was an unexpected increase in your co-pay or if you need help paying for your prescriptions and supplies. They might point you toward free samples, discount coupons, and vouchers offered by pharmaceutical companies and device manufacturers. Read on for other cost- cutting tips.

Helping Your Students with Homework: A Guide for Teachers.

ERIC Educational Resources Information Center

Paulu, Nancy; Darby, Linda B., Ed.

This guide for elementary and secondary teachers discusses 18 tips for creating meaningful homework assignments that students will complete. Following introductory sections that explore hurdles to homework, the guide details the following tips: (1) lay out expectations early in the school year; (2) create assignments with a purpose; (3) make sure…

Tips for Energy Savers.

ERIC Educational Resources Information Center

Department of Energy, Washington, DC.

According to 1986 U.S. Department of Energy data, 48% of our residential energy is used to heat and cool our homes, 16% goes for heating water, 12% is used to refrigerators and freezers, and the remaining 24% goes into lighting, cooking, and running appliances. This booklet contains tips for saving energy, including sections on: (1) draft-proof…

21 CFR 890.3790 - Cane, crutch, and walker tips and pads.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Cane, crutch, and walker tips and pads. 890.3790 Section 890.3790 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3790 Cane...

21 CFR 890.3790 - Cane, crutch, and walker tips and pads.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Cane, crutch, and walker tips and pads. 890.3790 Section 890.3790 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3790 Cane...

21 CFR 890.3790 - Cane, crutch, and walker tips and pads.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Cane, crutch, and walker tips and pads. 890.3790 Section 890.3790 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3790 Cane...

21 CFR 890.3790 - Cane, crutch, and walker tips and pads.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Cane, crutch, and walker tips and pads. 890.3790 Section 890.3790 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3790 Cane...

21 CFR 890.3790 - Cane, crutch, and walker tips and pads.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Cane, crutch, and walker tips and pads. 890.3790 Section 890.3790 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3790 Cane...

Tips on Developing Technical Training Partnerships.

ERIC Educational Resources Information Center

Just, David A.; And Others

This paper begins by presenting tips on developing technical training partnerships from the perspective of the local director of the Ohio Industrial Training Program. This section indicates that every linkage needs a catalyst and that the role of the Ohio Industrial Training Program is to be such a catalyst. The issues and concerns of which the…

Aerodynamic tip desensitization in axial flow turbines

NASA Astrophysics Data System (ADS)

Dey, Debashis

The leakage flow near the tip of unshrouded rotor blades in axial turbines imposes significant thermal loads on the blade. It is also responsible for up to a third of aerodynamic losses in a turbine stage. The leakage flow, mainly induced by the pressure differential across the rotor tip section, usually rolls into a stream-wise vertical structure near the suction side part of the blade tip. The current study uses several concepts to reduce the severity of losses introduced by the leakage vortex. Three tip desensitization techniques, both active and passive, are examined. Coolant flow from a tip trench is used to counter the momentum of the leakage jet. Next, a very short winglet obtained by slightly extending the tip platform in the tangential direction is investigated. Lastly, the widely used concept of squealer tip is studied. The current investigation is performed in the Axial Flow Turbine Research Facility (AFTRF) of the Pennsylvania State University. Rotating frame five hole probe measurements as well as stationary frame phase averaged total pressure measurements downstream of a single stage turbine facility were taken. The study enables one to draw conclusions about the nature of the flowfield in the rotor tip region. It also shows that significant efficiency gains could be obtained by using some of these techniques.

Experimental Study of Tip Vortex Flow from a Periodically Pitched Airfoil Section

NASA Technical Reports Server (NTRS)

Zaman, Khairul; Fagan, Amy; Mankbadi, Mina

2016-01-01

An experimental investigation of tip vortex flow from a NACA0012 airfoil, pitched periodically at various frequencies, is conducted in a low-speed wind tunnel. Initially, data for stationary airfoil held fixed at various angles-of-attack are gathered. Flow visualization pictures as well as detailed cross-sectional properties areobtained at various streamwise locations using hot-wire anemometry. Data include mean velocity, streamwise vorticity as well as various turbulent stresses. Preliminary data are also acquired for periodically pitched airfoil. These results are briefly presented in this extended abstract.

Free-Space Oscillating Pressures Near the Tips of Rotating Propellers

NASA Technical Reports Server (NTRS)

Hubbard, Harvey H; Regier, Arthur A

1950-01-01

The theory is given for calculating the free-space oscillating pressures associated with a rotating propeller, at any point in space. Because of its complexity this analysis is convenient only for use in the critical region near the propeller tips where the assumptions used by Gutin to simplify his final equations are not valid. Good agreement was found between analytical and experimental results in the tip Mach number range 0.45 to two, three, four, five, six, on eight-blade propellers and for a range of tip clearances from 0.04 to 0.30 times the propeller diameter. If the power coefficient, tip Mach number, and the tip clearance are known for a given propeller, the designer may determine from these charts the average maximum free-space oscillating pressure in the critical region near the plane of rotation. A section of the report is devoted to the fuselage response to these oscillating pressures and indicates some of the factors to be considered in solving the problems of fuselage vibration and noise.

Middle Years. For Middle Level Educators.

ERIC Educational Resources Information Center

Hechinger, Fred M.; And Others

1992-01-01

This supplement offers 10 articles focusing on middle school education. Topics include remembering adolescence, resources and teaching tips, active middle school students, adolescent development, challenges in middle school education, integrated studies, planning middle school special events, a writing-science-consumerism miniunit on popcorn,…

The Classroom Percussionist

ERIC Educational Resources Information Center

Marshall, Herbert D.

2006-01-01

The article offers tips on introducing percussion activities in elementary music class. Percussion equipment should be treated as musical instruments and not toys, teaching correct names, playing techniques and notation for the instruments. Active listening experiences for students should be planned, including band music. Band music incorporates…

A Learning Cycle Approach To Introducing Osmosis.

ERIC Educational Resources Information Center

Lawson, Anton E.

2000-01-01

Presents an inquiry activity with a learning cycle approach to engage students in testing their own hypotheses about how molecules move through cell membranes. Offers student materials and teacher materials, including teaching tips for each phase of the learning cycle. (Contains 11 references.) (ASK)

Make Better Beverage Choices: 10 Tips to Get Started

MedlinePlus

... beverage choices A healthy eating style includes all foods and beverages. Many beverages contain added sugars and offer little ... Most of us get enough water from the foods we eat and the beverages we drink. A healthy body can balance water ...

Watching the Storm.

ERIC Educational Resources Information Center

Larkin, Ray; Brevard, Henry

1992-01-01

Teamwork and cooperation were the keys in restoring school service in Berkeley County (South Carolina) 17 days after Hurricane Hugo. Offers school districts tips on what to do both before an emergency strikes and in the aftermath. Lists information available from the Federal Emergency Management Agency. (MLF)

Savvy Money Management Can Soothe the Sting of the Arbitrage Rebate.

ERIC Educational Resources Information Center

Resnick, Michael A.

1988-01-01

For school systems, the Tax Reform Act of 1986 increased the relative cost of borrowing and put greater limits on investment opportunities. Offers tips to help school boards ask the right questions to take advantage of all possible opportunities. (MLF)

You're Not Alone in Facing These Board-Related Bugaboos.

ERIC Educational Resources Information Center

Van Loozen, Luann F.

1982-01-01

School board service can have detrimental effects on members' personal lives. The most frequent and pervasive problems faced by board members are lack of time, loneliness, stress, alienation from community life, abuse, and fatigue. Problem-solving tips are offered. (Author/MLF)

Tests of three tapered airfoils based on the N.A.C.A. 2200, the N.A.C.A.-M6, and the Clark Y sections

NASA Technical Reports Server (NTRS)

Anderson, Raymond F

1934-01-01

Three tapered airfoils based on the N.A.C.A. 2200, the N.A.C.A.-M6, and the Clark Y sections were tested in the variable-density wind tunnel at a Reynolds Number of approximately 3,100,000. The models, which were of aspect ratio 6, had constant core center sections and rounded tips, and tapered in thickness from 18 percent at the roots to 9 percent at the tips. The aerodynamic characteristics are given by the usual dimensionless coefficients plotted for both positive and negative angles of attack and by effective profile-drag coefficients plotted against lift coefficients.

Ectopic Varices in the Gastrointestinal Tract: Short- and Long-Term Outcomes of Percutaneous Therapy

DOE Office of Scientific and Technical Information (OSTI.GOV)

Macedo, Thanila A., E-mail: macedo.thanila@mayo.edu; Andrews, James C.; Kamath, Patrick S.

2005-04-15

To evaluate the results of percutaneous management of ectopic varices, a retrospective review was carried out of 14 patients (9 men, 5 women; mean age 58 years) who between 1992 and 2001 underwent interventional radiological techniques for management of bleeding ectopic varices. A history of prior abdominal surgery was present in 12 of 14 patients. The interval between the surgery and percutaneous intervention ranged from 2 to 38 years. Transhepatic portal venography confirmed ectopic varices to be the source of portal hypertension-related gastrointestinal bleeding. Embolization of the ectopic varices was performed by a transhepatic approach with coil embolization of themore » veins draining into the ectopic varices. Transjugular intrahepatic portosystemic shunt (TIPS) was performed in the standard fashion. Eighteen procedures (12 primary coil embolizations, 1 primary TIPS, 2 re-embolizations, 3 secondary TIPS) were performed in 13 patients. One patient was not a candidate for percutaneous treatment. All interventions but one (re-embolization) were technically successful. In 2 of 18 interventions, re-bleeding occurred within 72 hr (both embolization patients). Recurrent bleeding (23 days to 27 months after initial intervention) was identified in 9 procedures (8 coil embolizations, 1 TIPS due to biliary fistula). One patient had TIPS revision because of ultrasound surveillance findings. New encephalopathy developed in 2 of 4 TIPS patients. Percutaneous coil embolization is a simple and safe treatment for bleeding ectopic varices; however, recurrent bleeding is frequent and reintervention often required. TIPS can offer good control of bleeding at the expense of a more complex procedure and associated risk of encephalopathy.« less

Finite Element Model and Validation of Nasal Tip Deformation

PubMed Central

Manuel, Cyrus T; Harb, Rani; Badran, Alan; Ho, David; Wong, Brian JF

2016-01-01

Nasal tip mechanical stability is important for functional and cosmetic nasal airway surgery. Palpation of the nasal tip provides information on tip strength to the surgeon, though it is a purely subjective assessment. Providing a means to simulate nasal tip deformation with a validated model can offer a more objective approach in understanding the mechanics and nuances of the nasal tip support and eventual nasal mechanics as a whole. Herein we present validation of a finite element (FE) model of the nose using physical measurements recorded using an ABS plastic-silicone nasal phantom. Three-dimensional photogrammetry was used to capture the geometry of the phantom at rest and while under steady state load. The silicone used to make the phantom was mechanically tested and characterized using a linear elastic constitutive model. Surface point clouds of the silicone and FE model were compared for both the loaded and unloaded state. The average Hausdorff distance between actual measurements and FE simulations across the nose were 0.39mm ± 1.04 mm and deviated up to 2mm at the outermost boundaries of the model. FE simulation and measurements were in near complete agreement in the immediate vicinity of the nasal tip with millimeter accuracy. We have demonstrated validation of a two-component nasal FE model, which could be used to model more complex modes of deformation where direct measurement may be challenging. This is the first step in developing a nasal model to simulate nasal mechanics and ultimately the interaction between geometry and airflow. PMID:27633018

Finite Element Model and Validation of Nasal Tip Deformation.

PubMed

Manuel, Cyrus T; Harb, Rani; Badran, Alan; Ho, David; Wong, Brian J F

2017-03-01

Nasal tip mechanical stability is important for functional and cosmetic nasal airway surgery. Palpation of the nasal tip provides information on tip strength to the surgeon, though it is a purely subjective assessment. Providing a means to simulate nasal tip deformation with a validated model can offer a more objective approach in understanding the mechanics and nuances of the nasal tip support and eventual nasal mechanics as a whole. Herein we present validation of a finite element (FE) model of the nose using physical measurements recorded using an ABS plastic-silicone nasal phantom. Three-dimensional photogrammetry was used to capture the geometry of the phantom at rest and while under steady state load. The silicone used to make the phantom was mechanically tested and characterized using a linear elastic constitutive model. Surface point clouds of the silicone and FE model were compared for both the loaded and unloaded state. The average Hausdorff distance between actual measurements and FE simulations across the nose were 0.39 ± 1.04 mm and deviated up to 2 mm at the outermost boundaries of the model. FE simulation and measurements were in near complete agreement in the immediate vicinity of the nasal tip with millimeter accuracy. We have demonstrated validation of a two-component nasal FE model, which could be used to model more complex modes of deformation where direct measurement may be challenging. This is the first step in developing a nasal model to simulate nasal mechanics and ultimately the interaction between geometry and airflow.

Winglet and long duct nacelle aerodynamic development for DC-10 derivatives

NASA Technical Reports Server (NTRS)

Taylor, A. B.

1978-01-01

Advanced technology for application to the Douglas DC-10 transport is discussed. Results of wind tunnel tests indicate that the winglet offers substantial cruise drag reduction with less wing root bending moment penalty than a wing-tip extension of the same effectiveness and that the long duct nacelle offers substantial drag reduction potential as a result of aerodynamic and propulsion improvements. The aerodynamic design and test of the nacelle and pylon installation are described.

Radiative control of dark excitons at room temperature by nano-optical antenna-tip Purcell effect

NASA Astrophysics Data System (ADS)

Park, Kyoung-Duck; Jiang, Tao; Clark, Genevieve; Xu, Xiaodong; Raschke, Markus B.

2018-01-01

Excitons, Coulomb-bound electron-hole pairs, are elementary photo-excitations in semiconductors that can couple to light through radiative relaxation. In contrast, dark excitons (XD) show anti-parallel spin configuration with generally forbidden radiative emission. Because of their long lifetimes, these dark excitons are appealing candidates for quantum computing and optoelectronics. However, optical read-out and control of XD states has remained challenging due to their decoupling from light. Here, we present a tip-enhanced nano-optical approach to induce, switch and programmably modulate the XD emission at room temperature. Using a monolayer transition metal dichalcogenide (TMD) WSe2 on a gold substrate, we demonstrate 6 × 105-fold enhancement in dark exciton photoluminescence quantum yield achieved through coupling of the antenna-tip to the dark exciton out-of-plane optical dipole moment, with a large Purcell factor of ≥2 × 103 of the tip-sample nano-cavity. Our approach provides a facile way to harness excitonic properties in low-dimensional semiconductors offering new strategies for quantum optoelectronics.

Radiative control of dark excitons at room temperature by nano-optical antenna-tip Purcell effect.

PubMed

Park, Kyoung-Duck; Jiang, Tao; Clark, Genevieve; Xu, Xiaodong; Raschke, Markus B

2018-01-01

Excitons, Coulomb-bound electron-hole pairs, are elementary photo-excitations in semiconductors that can couple to light through radiative relaxation. In contrast, dark excitons (X D ) show anti-parallel spin configuration with generally forbidden radiative emission. Because of their long lifetimes, these dark excitons are appealing candidates for quantum computing and optoelectronics. However, optical read-out and control of X D states has remained challenging due to their decoupling from light. Here, we present a tip-enhanced nano-optical approach to induce, switch and programmably modulate the X D emission at room temperature. Using a monolayer transition metal dichalcogenide (TMD) WSe 2 on a gold substrate, we demonstrate ~6 × 10 5 -fold enhancement in dark exciton photoluminescence quantum yield achieved through coupling of the antenna-tip to the dark exciton out-of-plane optical dipole moment, with a large Purcell factor of ≥2 × 10 3 of the tip-sample nano-cavity. Our approach provides a facile way to harness excitonic properties in low-dimensional semiconductors offering new strategies for quantum optoelectronics.

User’s manual for the National Water Information System of the U.S. Geological Survey: Water-Quality System

USGS Publications Warehouse

Dupré, David H.; Scott, Jonathon C.; Clark, Melanie L.; Canova, Michael G.; Stoker, Yvonne E.

2013-01-01

This user documentation is designed to be a reference for the quality of water (QW) programs within the National Water Information System (NWIS). If you are a new user, the “Introduction” and “Getting Started” sections may be the right place for you to start. If you are an experienced user, you may want to go straight to the details provided in the “Program” section (section 3). Code lists and some miscellaneous reference materials are provided in the Appendices. The last section, “Tip Sheets,” is a collection of suggestions for accomplishing selected tasks, some of which are basic and some are advanced. These tip sheets are referenced in the main text of the documentation where appropriate.

Endovascular Management of Refractory Hepatic Encephalopathy Complication of Transjugular Intrahepatic Portosystemic Shunt (TIPS): Comprehensive Review and Clinical Practice Algorithm

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pereira, Keith, E-mail: keithjppereira@gmail.com; Carrion, Andres F., E-mail: andres.carrionmonsa@jhsmiami.org; Salsamendi, Jason, E-mail: JSalsamendi@med.miami.edu

Transjugular intrahepatic portosystemic shunt (TIPS) has evolved as an effective intervention for treatment of complications of portal hypertension. The use of polytetrafluoroethylene-covered stents have improved the patency of the shunts and diminished the incidence of TIPS dysfunction. However, TIPS-related refractory hepatic encephalopathy (rHE) poses a significant challenge. Approximately 3–7 % of patients with TIPS develop rHE. Refractory hepatic encephalopathy is defined as a recurrent or persistent encephalopathy despite appropriate medical treatment. Hepatic encephalopathy can be an extremely debilitating complication that profoundly affects quality of life. The approach to management of patients with rHE is complex and typically requires collaboration between differentmore » specialties. Liver transplantation is the ultimate treatment for rHE; however, the ongoing shortage of organ donation markedly limits this treatment option. Alternative therapies such as shunt occlusion or reduction can control symptoms and serve as a ‘bridge’ therapy to liver transplantation. Therefore, interventional radiologists play a key role in the management of these patients by offering a variety of endovascular techniques. The purpose of this review is to highlight some of these endovascular techniques and to develop a therapeutic algorithm that can be applied in clinical practice for the management of rHE.« less

29 CFR 531.7 - Request for review of tip credit.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 29 Labor 3 2010-07-01 2010-07-01 false Request for review of tip credit. 531.7 Section 531.7 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS WAGE PAYMENTS UNDER THE FAIR LABOR STANDARDS ACT OF 1938 Determinations of âReasonable Costâ and âFair Valueâ...

Pro-anorexia websites: what a clinician should know.

PubMed

Harshbarger, Jenni L; Ahlers-Schmidt, Carolyn R; Mayans, Laura; Mayans, David; Hawkins, Joseph H

2009-05-01

The purpose of this study was to conduct a content analysis of the "Tips and Tricks" section of pro-ana websites to better understand information shared on these sites, and aide clinicians in identification, treatment, and prevention of anorexia. Nine pro-ana websites were evaluated to identify categories of information in "Tips and Tricks." A content analysis was performed using emergent coding methods and 16 categories were determined. Reliability was acceptable (Cohen's Kappa = 0.702). Discrepancies were corrected by consensus. Frequencies of individual categories were computed. Most "Tips and Tricks" are directed at dieting/restricting calories (28.6%) and distraction (14.0%). Most disturbing, 11% of comments were directed at lying and concealing symptoms. Clinicians aware of "Tips and Tricks" might be better equipped to recognize the symptoms of anorexia early in treatment. Knowledge of "Tips and Tricks" can also facilitate better education, making it difficult for clients to conceal their illness.

Rapid Polymer Sequencer

NASA Technical Reports Server (NTRS)

Stolc, Viktor (Inventor); Brock, Mathew W. (Inventor)

2011-01-01

Method and system for rapid and accurate determination of each of a sequence of unknown polymer components, such as nucleic acid components. A self-assembling monolayer of a selected substance is optionally provided on an interior surface of a pipette tip, and the interior surface is immersed in a selected liquid. A selected electrical field is impressed in a longitudinal or transverse direction at the tip, a polymer sequence is passed through the tip, and a change in an electrical current signal is measured as each polymer component passes through the tip. Each measured change in electrical current signals is compared with a database of reference signals, with each reference signal identified with a polymer component, to identify the unknown polymer component. The tip preferably has a pore inner diameter of no more than about 40 nm and is prepared by heating and pulling a very small section of a glass tubing.

Accurate real-time sensing tip for aqueous NO with optical fibers embedded in active hydrogel waveguide

NASA Astrophysics Data System (ADS)

Chung, Chieh-Wen; Tsai, May-Jywan; Lin, Peng-Wei; Huang, Ding-Wen; Wang, Kuan-Hsun; Chen, Yu-An; Meng, Hsin-Fei; Zan, Hsiao-Wen; Cheng, Henrich; Tong, Limin; Zhang, Lei; Horng, Sheng-Fu; Hung, Cheng-Hsiung

2018-02-01

A NO sensing tip is made by inserting two parallel optical fibers inside a poly 2-hydroxyethyl methacrylate (PolyHEMA) hydrogel waveguide mixed with the probe molecule 1, 2-Diaminoanthraquinone (DAQ). There is a length difference of 1 mm between the two fibers, and the light has to propagate through the difference from the short fiber to the long fiber. The total cross section area of the active hydrogel waveguide embedded with the fibers is only 3mm x 1.2 mm. For practical use the tip is housed in a needle for mechanical protection and the sensing tip is able to detect aqueous NO concentration around 1 μM with time resolution about 5 minutes. Such a sensing tip can be used to monitor the medical conditions inside the brain after a stroke or a brain injury.

Aeroelastic behavior of composite rotor blades with swept tips

NASA Technical Reports Server (NTRS)

Yuan, Kuo-An; Friedmann, Peretz P.; Venkatesan, Comandur

1992-01-01

This paper presents an analytical study of the aeroelastic behavior of composite rotor blades with straight and swept tips. The blade is modeled by beam type finite elements. A single finite element is used to model the swept tip. The nonlinear equations of motion for the finite element model are derived using Hamilton's principle and based on a moderate deflection theory and accounts for: arbitrary cross-sectional shape, pretwist, generally anisotropic material behavior, transverse shears and out-of-plane warping. Numerical results illustrating the effects of tip sweep, anhedral and composite ply orientation on blade aeroelastic behavior are presented. It is shown that composite ply orientation has a substantial effect on blade stability. At low thrust conditions, certain ply orientations can cause instability in the lag mode. The flap-torsion coupling associated with tip sweep can also induce aeroelastic instability in the blade. This instability can be removed by appropriate ply orientation in the composite construction.

Tip/tilt optimizations for polynomial apodized vortex coronagraphs on obscured telescope pupils

NASA Astrophysics Data System (ADS)

Fogarty, Kevin; Pueyo, Laurent; Mazoyer, Johan; N'Diaye, Mamadou

2017-09-01

Obstructions due to large secondary mirrors, primary mirror segmentation, and secondary mirror support struts all introduce diffraction artifacts that limit the performance offered by coronagraphs. However, just as vortex coronagraphs provides theoretically ideal cancellation of on-axis starlight for clear apertures, the Polynomial Apodized Vortex Coronagraph (PAVC) completely blocks on-axis light for apertures with central obscurations, and delivers off-axis throughput that improves as the topological charge of the vortex increases. We examine the sensitivity of PAVC designs to tip/tilt aberrations and stellar angular size, and discuss methods for mitigating these effects. By imposing additional constraints on the pupil plane apodization, we decrease the sensitivity of the PAVC to the small positional shifts of the on-axis source induced by either tip/tilt or stellar angular size; providing a route to overcoming an important hurdle facing the performance of vortex coronagraphs on telescopes with complicated pupils.

Tips for using mobile audience response systems in medical education

PubMed Central

Gousseau, Michael; Sommerfeld, Connor; Gooi, Adrian

2016-01-01

Background With growing evidence on the benefits of active learning, audience response systems (ARSs) have been increasingly used in conferences, business, and education. With the introduction of mobile ARS as an alternative to physical clickers, there are increasing opportunities to use this tool to improve interactivity in medical education. Aim The aim of this study is to provide strategies on using mobile ARS in medical education by discussing steps for implementation and pitfalls to avoid. Method The tips presented reflect our commentary of the literature and our experiences using mobile ARS in medical education. Results This article offers specific strategies for the preparation, implementation, and assessment of medical education teaching sessions using mobile ARS. Conclusion We hope these tips will help instructors use mobile ARS as a tool to improve student interaction, teaching effectiveness, and participant enjoyment in medical education. PMID:27942242

Friction Anisotropy with Respect to Topographic Orientation

PubMed Central

Yu, Chengjiao; Wang, Q. Jane

2012-01-01

Friction characteristics with respect to surface topographic orientation were investigated using surfaces of different materials and fabricated with grooves of different scales. Scratching friction tests were conducted using a nano-indentation-scratching system with the tip motion parallel or perpendicular to the groove orientation. Similar friction anisotropy trends were observed for all the surfaces studied, which are (1) under a light load and for surfaces with narrow grooves, the tip motion parallel to the grooves offers higher friction coefficients than does that perpendicular to them, (2) otherwise, equal or lower friction coefficients are found under this motion. The influences of groove size relative to the diameter of the mating tip (as a representative asperity), surface contact stiffness, contact area, and the characteristic stiction length are discussed. The appearance of this friction anisotropy is independent of material; however, the boundary and the point of trend transition depend on material properties. PMID:23248751

Twelve tips for reducing production time and increasing long-term usability of instructional video.

PubMed

Norman, Marie K

2017-08-01

The use of instructional video is increasing across all disciplines and levels of education. Although video has a number of distinct advantages for course delivery and student learning, it can also be time-consuming and resource-intensive to produce, which imposes a burden on busy faculty. With video poised to play a larger role in medical education, we need strategies for streamlining video production and ensuring that the video we produce is of lasting value. This article draws on learning research and best practices in educational technology, along with the author's experience in online education and video production. It offers 12 practical tips for reducing the initial time investment in video production and creating video that can be reused long into the future. These tips can help faculty and departments create high-quality instructional video while using their time and resources more wisely.

Multiple piece turbine rotor blade

DOEpatents

Kimmel, Keith D.; Plank, William L.

2016-07-19

A spar and shell turbine rotor blade with a spar and a tip cap formed as a single piece, the spar includes a bottom end with dovetail or fir tree slots that engage with slots on a top end of a root section, and a platform includes an opening on a top surface for insertion of the spar in which a shell made from an exotic high temperature resistant material is secured between the tip cap and the platform. The spar is tapered to form thinner walls at the tip end to further reduce the weight and therefore a pulling force due to blade rotation. The spar and tip cap piece is made from a NiAL material to further reduce the weight and the pulling force.

Engaging Parents through Better Communication Systems

ERIC Educational Resources Information Center

Kraft, Matthew A.

2017-01-01

Matthew A. Kraft, an assistant professor of education and economics at Brown University, highlights new research showing that frequent, personalized outreach to parents can boost parent engagement and student achievement. He offers tips on how schools can create infrastructures, including digital technology tools, to better support such…

Time Out for Time Management.

ERIC Educational Resources Information Center

Herr, Judy; And Others

1995-01-01

Offers early childhood program administrators time management strategies to increase available time, efficiency, and effectiveness. To manage paper, directors should clear the desk top, use in-out baskets, create a filing system, and handle mail effectively. Tips for managing meetings include preparing an agenda, scheduling meetings for…

Software to Go--And It Goes!

ERIC Educational Resources Information Center

Abrams, Mary; Kurlychek, Ken

1989-01-01

This article describes the Software Evaluation Clearinghouse for Educators of the Hearing Impaired at Gallaudet University (Washington, DC). Software compatible with Apple and IBM hardware is collected, rated by clearinghouse members, and described in a printed catalog. Tips on starting a software lending library are offered. (PB)

Go Where the Grants Are

ERIC Educational Resources Information Center

Anderson, Cynthia; Knop, Kathi

2008-01-01

In the world of grant-making, there are private, corporate, and government sources at the local, state, and federal level, and each of them has funds to award. The trick is to make a good match. This article offers tips for finding grant funds and writing grants.

Take My Kids, Pleeze!

ERIC Educational Resources Information Center

Bushweller, Kevin

1996-01-01

Increasing numbers of parents are "dumping" parental responsibilities at the school-house door. However, a highly vocal and politically active minority of parents are demanding that schools relinquish those responsibilities. One helpful role the schools can play is to offer parent-education classes that provide specific tips on disciplining…

Energy Digest.

ERIC Educational Resources Information Center

Gaddy, Carol T., Ed.; Wells, Kathy, Ed.

This collection of reprints offers practical solutions, not readily available elsewhere, to everyday energy problems, such as high utility bills, insulating windows, getting more gas mileage, or buying a more efficient washer or refrigerator. The Arkansas Energy Office provides a weekly column of energy news and conservation tips to newspapers,…

Seafood Products Course Lecture Guide.

ERIC Educational Resources Information Center

Long, John Wingo, Ed.; And Others

This consumer's guide offers practical information about the characteristics and uses of seafoods. It covers both finfish and shellfish, including crabs, lobsters, shrimp, oysters, clams, and scallops. It describes the characteristics, important species, fishing methods, market forms, and consumer inspection tips. It also gives such information as…

Narrowing Your Seating Options.

ERIC Educational Resources Information Center

Vukovic, Vladimir

1998-01-01

Offers guidance on selecting appropriate seating furniture for outdoor facilities, arenas, auditoriums, and lecture rooms. Considerations such as beam mounting systems to facilitate laptop computer and campuswide networking use by students and chair durability and ergonomics are discussed as are tips for choosing a seating remanufacturing company.…

More Than a Mascot.

ERIC Educational Resources Information Center

Riede, Paul

2001-01-01

Describes how several school districts have coped with protracted and contentious community debate over the retirement of high school Native American team names and mascots, when Native American sensibilities clash with high school rituals and traditions. Offers tips on how to deal with the Native American mascot issue. (PKP)

From the Stadium Parking Lot to the Information Superhighway: How To Protect Your Trademarks from Infringement.

ERIC Educational Resources Information Center

Bearby, Scott; Siegal, Bruce

2002-01-01

Provides an overview of collegiate trademark cases; discusses several forms of infringement, including traditional infringement on commercial products, ambush marketing, and Internet infringement; addresses available remedies; and offers practical tips for dealing effectively with trademark protection. (EV)

Hard Facts.

ERIC Educational Resources Information Center

Shaw, Richard

1998-01-01

Discusses the selection of floor-care equipment so that the equipment's features and performance attributes can match their intended purposes. Offers tips such as buying only composite-material buckets and wringers, choosing cleaning machines with good maintenance track records, and buying automatic scrubbers that can operate in both large and…

Fibre tip pH sensor for tumor detection during surgery

NASA Astrophysics Data System (ADS)

Henderson, Matthew R.; Schartner, Erik P.; Callen, David F.; Gill, P. Grantley; Monro, Tanya M.

2015-05-01

Surgery on tumours commonly involves a lumpectomy method, where a section of tissue containing the tumour is removed, to improve cosmetic outcomes and quality of life. Following surgery, the margins of the removed section are checked by pathology tests to ensure that the entire tumour has been removed. Unfortunately, approximately 15-20% of margins show incomplete removal and require a subsequent operation to remove the remaining tumour. Tumour detection during surgery could allow the removed section to be enlarged appropriately, reducing the likelihood of requiring subsequent surgery. A change in the extracellular pH in the vicinity of a tumour, when compared to normal tissue, has been shown previously in literature. We have fabricated an optical fibre tip pH sensor by embedding a fluorophore within a photopolymerised acrylamide polymer on the tip of a 200 micron diameter silica fibre. Preliminary measurements of human melanoma samples have shown a significant difference in the measured pH values between tumour and normal tissue. This demonstration paves to way to highly accurate margin detection during surgery.

Micromachined electron tunneling infrared sensors

NASA Technical Reports Server (NTRS)

Kenny, T. W.; Kaiser, W. J.; Podosek, J. A.; Rockstad, H. K.; Reynolds, J. K.

1993-01-01

The development of an improved Golay cell is reported. This new sensor is constructed entirely from micromachined silicon components. A silicon oxynitride (SiO(x)N(y)) membrane is deflected by the thermal expansion of a small volume of trapped gas. To detect the motion of the membrane, an electron tunneling transducer is used. This sensor detects electrons which tunnel through the classically forbidden barrier between a tip and a surface; the electron current is exponentially dependent on the separation between the tip and the surface. The sensitivity of tunneling transducers constructed was typically better than 10(exp -3) A/square root of Hz. Through use of the electron tunneling transducer, the scaling laws which have prevented the miniaturization of the Golay cell are avoided. This detector potentially offers low cost fabrication, compatibility with silicon readout electronics, and operation without cooling. Most importantly, this detector may offer better sensitivity than any other uncooled infrared sensor, with the exception of the original Golay cell.

Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles

NASA Astrophysics Data System (ADS)

Rodriguez, Raul D.; Sheremet, Evgeniya; Deckert-Gaudig, Tanja; Chaneac, Corinne; Hietschold, Michael; Deckert, Volker; Zahn, Dietrich R. T.

2015-05-01

Nanomaterials have the remarkable characteristic of displaying physical properties different from their bulk counterparts. An additional degree of complexity and functionality arises when oxide nanoparticles interact with metallic nanostructures. In this context the Raman spectra due to plasmonic enhancement of iron oxide nanocrystals are here reported showing the activation of spin-waves. Iron oxide nanoparticles on gold and silver tips are found to display a band around 1584 cm-1 attributed to a spin-wave magnon mode. This magnon mode is not observed for nanoparticles deposited on silicon (111) or on glass substrates. Metal-nanoparticle interaction and the strongly localized electromagnetic field contribute to the appearance of this mode. The localized excitation that generates this mode is confirmed by tip-enhanced Raman spectroscopy (TERS). The appearance of the spin-waves only when the TERS tip is in close proximity to a nanocrystal edge suggests that the coupling of a localized plasmon with spin-waves arises due to broken symmetry at the nanoparticle border and the additional electric field confinement. Beyond phonon confinement effects previously reported in similar systems, this work offers significant insights on the plasmon-assisted generation and detection of spin-waves optically induced.Nanomaterials have the remarkable characteristic of displaying physical properties different from their bulk counterparts. An additional degree of complexity and functionality arises when oxide nanoparticles interact with metallic nanostructures. In this context the Raman spectra due to plasmonic enhancement of iron oxide nanocrystals are here reported showing the activation of spin-waves. Iron oxide nanoparticles on gold and silver tips are found to display a band around 1584 cm-1 attributed to a spin-wave magnon mode. This magnon mode is not observed for nanoparticles deposited on silicon (111) or on glass substrates. Metal-nanoparticle interaction and the strongly localized electromagnetic field contribute to the appearance of this mode. The localized excitation that generates this mode is confirmed by tip-enhanced Raman spectroscopy (TERS). The appearance of the spin-waves only when the TERS tip is in close proximity to a nanocrystal edge suggests that the coupling of a localized plasmon with spin-waves arises due to broken symmetry at the nanoparticle border and the additional electric field confinement. Beyond phonon confinement effects previously reported in similar systems, this work offers significant insights on the plasmon-assisted generation and detection of spin-waves optically induced. Electronic supplementary information (ESI) available. See DOI: 10.1039/c5nr01277e

Heat Transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine. Part 1; Experimental Results

NASA Technical Reports Server (NTRS)

Bunker, Ronald S.; Bailey, Jeremy C.; Ameri, Ali A.

1999-01-01

A combined computational and experimental study has been performed to investigate the detailed distribution of convective heat transfer coefficients on the first stage blade tip surface for a geometry typical of large power generation turbines(>100MW). This paper is concerned with the design and execution of the experimental portion of the study. A stationary blade cascade experiment has been run consisting of three airfoils, the center airfoil having a variable tip gap clearance. The airfoil models the aerodynamic tip section of a high pressure turbine blade with inlet Mach number of 0.30, exit Mach number of 0.75, pressure ratio of 1.45, exit Reynolds number based on axial chord of 2.57 x 10(exp 6), and total turning of about 110 degrees. A hue detection based liquid crystal method is used to obtain the detailed heat transfer coefficient distribution on the blade tip surface for flat, smooth tip surfaces with both sharp and rounded edges. The cascade inlet turbulence intensity level took on values of either 5% or 9%. The cascade also models the casing recess in the shroud surface ahead of the blade. Experimental results are shown for the pressure distribution measurements on the airfoil near the tip gap, on the blade tip surface, and on the opposite shroud surface. Tip surface heat transfer coefficient distributions are shown for sharp-edge and rounded-edge tip geometries at each of the inlet turbulence intensity levels.

Reynolds-averaged Navier-Stokes computation on tip clearance flow in a compressor cascade using an unstructured grid

NASA Astrophysics Data System (ADS)

Shin, Sangmook

2001-07-01

A three-dimensional unstructured incompressible RANS code has been developed using artificial compressibility and Spalart-Allmaras eddy viscosity model. A node-based finite volume method is used in which all flow variables are defined at the vertices of tetrahedrons in an unstructured grid. The inviscid fluxes are computed by using the Roe's flux difference splitting method, and higher order accuracy is attained by data reconstruction based on Taylor series expansion. Gauss theorem is used to formulate necessary gradients. For time integration, an implicit scheme based on linearized Euler backward method is used. A tetrahedral unstructured grid generation code has been also developed and applied to the tip clearance flow in a highly staggered cascade. Surface grids are first generated in the flow passage and blade tip by using several triangulation methods including Delaunay triangulation, advancing front method and advancing layer method. Then the whole computational domain including tip gap region is filled with prisms using the surface grids. The code has been validated by comparisons with available computational and experimental results for several test cases: inviscid flow around NACA section, laminar and turbulent flow over a flat plate, turbulent flow through double-circular arc cascade and laminar flow through a square duct with 90° bend. Finally the code is applied to a linear cascade that has GE rotor B section with tip clearance and a high stagger angle of 56.9°. The overall structure of the tip clearance flow is well predicted. Loss of loading due to tip leakage flow and reloading due to tip leakage vortex are presented. On the end wall, separation line of the tip leakage vortex and reattachment line of passage vortex are identified. Prediction of such an interaction presents a challenge to RANS computations. The effects of blade span on the flow structure have been also investigated. Two cascades with blades of aspect ratios of 0.5 and 1.0 are considered. By comparing pressure distributions on the blade, it is shown that the aspect ratio has strong effects on loading distribution on the blade although the tip gap height is very small (0.016 chord). Grid convergence study has been carried out with three different grids for pressure distributions and limiting streamlines on the end wall. (Abstract shortened by UMI.)

Optical and thermal performance of bladed receivers

NASA Astrophysics Data System (ADS)

Pye, John; Coventry, Joe; Ho, Clifford; Yellowhair, Julius; Nock, Ian; Wang, Ye; Abbasi, Ehsan; Christian, Joshua; Ortega, Jesus; Hughes, Graham

2017-06-01

Bladed receivers use conventional receiver tube-banks rearranged into bladed/finned structures, and offer better light trapping, reduced radiative and convective losses, and reduced tube mass, based on the presented optical and thermal analysis. Optimising for optical performance, deep blades emerge. Considering thermal losses leads to shallower blades. Horizontal blades perform better, in both windy and no-wind conditions, than vertical blades, at the scales considered so far. Air curtains offer options to further reduce convective losses; high flux on blade-tips is still a concern.

Investigation of a free-tip rotor configuration for research on spanwise life distributions and wake velocity surveys of a semi-span wing with a discontinuous twist

NASA Technical Reports Server (NTRS)

Fortin, Paul; Kumagai, Hiroyuki

1989-01-01

A wind tunnel test was conducted in the NASA Ames 7 x 10 Foot Wind Tunnel to investigate the lift distribution on a semi-span wing with a discontinuous change in spanwise twist. The semi-span wing had a tip with an adjustable pitch angle independent on the inboard section pitch angle simulating the free-tip rotor blade when its free-tip is at a deflected position. The spanwise lift distribution over the wing and the tip were measured and three component velocity surveys behind the wing were obtained with a three dimensional laser Doppler velocimeter (LV) with the wing at one angle of attack and the tip deflected at different pitch angles. A six component internal strain gage balance was also used to measure total forces and moments on the tip. The three dimensional lift was computed from the two dimensional life distributions obtained from the LV and from the strain gage balance. The results from both experimental methods are shown to be in agreement with predictions made by a steady, three dimensional panel code, VSAERO.

Dynamic cone penetration tests in granular media: Determination of the tip's dynamic load-penetration curve

NASA Astrophysics Data System (ADS)

Escobar, E.; Benz, M.; Gourvès, R.; Breul, P.

2013-06-01

In this article a two-dimensional discrete numerical model, realized in PFC2D, is presented. This model is used in the dynamic penetration tests in a granular medium. Its objective being the validation of the measurement technique offered by Panda 3® (Benz et al. 2011) which is designed to calculate the tip's load-penetration curve for each impact in the soil where different parameters are used. To do so, we have compared the results obtained by calculation during the impacts to those measured directly in the model of a penetrometer through the installation of the gauges at the cone.

Staying out of the Cold.

ERIC Educational Resources Information Center

Levinson, Patrick J.

1996-01-01

Discusses how annual boiler maintenance can help cut fuel costs and prevent downtime. Outlines a cleaning program, which includes inspecting the fireside of the boiler, checking the refractory, and checking the waterside. Describes other maintenance measures, such as checking hydraulic fluid levels, and offers tips for analyzing combustion. (RJM)

Direct Instruction News, 2001.

ERIC Educational Resources Information Center

Tarver, Sara, Ed.

2001-01-01

These three issues of a newsletter offer diverse kinds of information deemed to be of interest to Association for Direct Instruction (ADI) members--stories of successful implementations in different settings, write-ups of ADI awards, tips on "how to" deliver direct instruction (DI) more effectively, topical articles focused on particular…

FIRST Robotics, Gulfport High, StenniSphere, Bo Clarke, mentor

NASA Technical Reports Server (NTRS)

2006-01-01

Bo Clarke, mentor for Gulfport High School's Team Fusion, offers strategy tips to students and coaches during the FIRST Robotics Competition kickoff held at StenniSphere on Jan. 7. Clarke is the lead building and infrastructure specialist for NASA's Shared Services Center at Stennis Space Center.

Help Children--and Families--Learn Basic Fire Safety.

ERIC Educational Resources Information Center

Texas Child Care, 2001

2001-01-01

Presents tips to help early childhood teachers and caregivers teach young children fire safety. Provides checklist for preventing fires in the kitchen, classrooms, and storage areas. Offers suggestions for classroom learning activities and for educating families about fire safety. Includes annotated bibliography of children's books dealing with…

Tactics for Improving Parenting Skills (TIPS).

ERIC Educational Resources Information Center

Algozzine, Bob, Ed.; Ysseldyke, Jim, Ed.

This manual presents 99 one-sheet informational brochures designed to improve parenting skills. Each brochure is in a format suitable for duplicating, folding, and distributing. Each parenting "tactic" offers references to related brochures. Tactics are grouped under the following broad areas: (1) home/family involvement (e.g., accepting "The…

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-18

Employees discuss one of the electric vehicles on display during Kennedy Space Center’s annual Earth Day celebration. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

FIRST Robotics, Gulfport High, StenniSphere, Bo Clarke, mentor

NASA Image and Video Library

2006-01-07

Bo Clarke, mentor for Gulfport High School's Team Fusion, offers strategy tips to students and coaches during the FIRST Robotics Competition kickoff held at StenniSphere on Jan. 7. Clarke is the lead building and infrastructure specialist for NASA's Shared Services Center at Stennis Space Center.

A Hopping Good Time: Wood Frogs in the Classroom.

ERIC Educational Resources Information Center

Shimkanin, John; Ulm, Glenn; King, Trina

1998-01-01

Presents a case for using wood frogs to study biology with students. Offers tips on where to find the eggs, how to care for them, what to expect as they hatch, and how to engage students in a study of their stages of development. (DDR)

Teaching with Interactive Multimedia.

ERIC Educational Resources Information Center

Hudson, Tim

Based on the idea that anyone who is interested in making entertaining and informative presentations in educational settings is interested in multimedia, this practical guide offers tips for communication (and other) teachers who want to integrate and program interactive multimedia into their courses. The guide suggests that teachers on limited…

Maximizing Success by Work Setting Diagnosis.

ERIC Educational Resources Information Center

Sturner, William F.

1990-01-01

This article confronts the tension between creative expression and organizational realities in the workplace. It offers tips on diagnosing such components of the work setting as personal potential and ambition, supervisors' roles, colleagues' roles, organizational culture, and other variables that may influence the success of one's innovations in…

Seeing and Doing Science--With Video.

ERIC Educational Resources Information Center

Berger, Michelle Abel

1994-01-01

The article presents a video-based unit on camouflage for students in grades K-5, explaining how to make the classroom VCR a dynamic teaching tool. Information is offered on introducing the unit, active viewing strategies, and follow-up activities. Tips for teaching with video are included. (SM)

Separation: Supporting Children in Their Preschool Transitions. Revised Edition

ERIC Educational Resources Information Center

Jervis, Kathe; Polland, Barbara K.

2007-01-01

This book, updated since initial publication in 1989, offers explanations, practical tips, and encouragement for teachers and families of preschool children facing the excitement--and stress--of separation. Topics discussed include ambivalence about separation and attachment, the comfort of routines, understanding the child perspective, supporting…

Going Online: Helping Technical Communicators Help Translators.

ERIC Educational Resources Information Center

Flint, Patricia; Lord van Slyke, Melanie; Starke-Meyerring, Doreen; Thompson, Aimee

1999-01-01

Explains why technical communicators should help translators. Offers tips for creating "translation-friendly" documentation. Describes the research and design process used by the authors to create an online tutorial that provides technical communicators at a medical technology company the information they need to help them write and…

Living in Japan. Intercultural Exchange Series. Revised.

ERIC Educational Resources Information Center

Hawkinson, Annie

The guide provides a brief introduction to the culture and language of Japan, and is designed for visitors, students, and business travelers. It offers practical information on various aspects of daily living, including: money; banks; food; restaurants; hotels; tipping; postal and telecommunications services; transportation; shopping; health and…

On Purpose: Addressing Teasing and Bullying in Early Childhood.

ERIC Educational Resources Information Center

Froschl, Merle; Sprung, Barbara

1999-01-01

Examines the incidence of teasing/bullying in early childhood classrooms and how teachers' responses help determine the extent of teasing/bullying. Presents tips for addressing this behavior before it becomes ingrained, including talking about teasing/bullying, making classroom rules, offering noncompetitive games and quieting activities,…

The Primary Teacher's Survival Guide.

ERIC Educational Resources Information Center

Heyda, Pamela A.

This guide for primary school teachers presents commonly asked questions and answers. Chapter 1, "How Do I Set Up My Classroom?" discusses desk and furniture arrangement. Chapter 2, "How Do I Survive the First Days of School?" offers tips for meeting and greeting students, establishing routines, and presenting activities.…

The English Internship Program at Michigan State University.

ERIC Educational Resources Information Center

Dornan, Reade

Recognizing that English majors need some preparation for a wider choice of employment opportunities, the Michigan State University English Department initiated an internship program in 1979 to offer students work experience, vocational advice, and practical tips for securing permanent employment. Although the choices for English intern positions…

TIPS Pamphlets for Parents.

ERIC Educational Resources Information Center

Algozzine, Bob, Ed.; Ysseldyke, Jim, Ed.

This manual presents 99 one-sheet informational brochures designed to improve parenting skills for children with and without disabilities. Each brochure is in a format suitable for duplicating, folding, and distributing. Each brochure offers references to related brochures in the collection. Brochures are grouped under the following broad areas:…

The Complete Resource Guide for Summer Youth Programs. Program Ideas for Summer Youth Jobs Project Managers.

ERIC Educational Resources Information Center

National Alliance of Business, Inc., Washington, DC.

This guide consists of suggestions, ideas, and tips intended to stimulate development of cooperative summer youth employment programs in local communities. Addressed in the individual sections of the guide are the following topics: tips on where to start, suggestions on how to get started, hints on securing resources, program resources, use of…

Winter Survival: A Consumer's Guide to Winter Preparedness.

ERIC Educational Resources Information Center

Department of Energy, Washington, DC.

This booklet discusses a variety of topics to help consumers prepare for winter. Tips for the home include: winterizing the home, dealing with a loss of heat or power failure, and what you need to have on hand. Another section gives driving tips and what to do in a storm. Health factors include suggestions for keeping warm, signs and treatment for…

29 CFR 779.17 - Wage and wage payments to tipped employees.

Code of Federal Regulations, 2010 CFR

2010-07-01

... ACT AS APPLIED TO RETAILERS OF GOODS OR SERVICES General Some Basic Definitions § 779.17 Wage and wage... per centum of the applicable minimum wage rate, except that in the case of an employee who (either... 29 Labor 3 2010-07-01 2010-07-01 false Wage and wage payments to tipped employees. 779.17 Section...

Finite element analysis on preferable I-bar clasp shape.

PubMed

Sato, Y; Tsuga, K; Abe, Y; Asahara, S; Akagawa, Y

2001-05-01

An I-bar clasp is one of the most popular direct retainers for distal-extension removable partial dentures. However, no adequate information is available on preferable shape as determined by biomechanics. This study aimed (1) to investigate, by finite element analysis (FEA), the dimensions and stress of I-bar clasps having the same stiffness, and (2) to estimate a mechanically preferable clasp design. Three-dimensional FEA models of I-bar clasps were created with vertical and horizontal straight sections connected by a curved section characterized by six parameters: thickness of the clasp tip, width of the clasp tip, radius of the curvature, horizontal distance between the base and the vertical axis, vertical dimension between the tip and the horizontal axis, and taper (change of width per unit length along the axis). Stress was calculated with a concentrated load of 5 N applied 2 mm from the tip of the clasp in the buccal direction. A thinner and wider clasp having an taper of 0.020-0.023 and radius of curvature of 2.75-3.00 showed less stress. The results suggest that such a shape might be the preferable I-bar clasp shape as biomechanical viewpoint.

High-tip-speed, low-loading transonic fan stage. Part 3: Final report

NASA Technical Reports Server (NTRS)

Ware, T. C.; Kobayashi, R. J.; Jackson, R. J.

1974-01-01

Tests were conducted on a high-tip-speed, low-loading transonic fan stage to determine the performance and inlet flow distortion tolerance of the design. The fan was designed for high efficiency at a moderate pressure ratio by designing the hub section to operate at minimum loss when the tip operates with an oblique shock. The design objective was an efficiency of 86 percent at a pressure ratio of 1.5, a specific flow (flow per unit annulus area) of 42 lb/sec-sq. ft (205.1 kgm/sec-m sq), and a tip speed of 1600 ft/sec (488.6 m/sec). During testing, a peak efficiency of 84 percent was achieved at design speed and design specific flow. At the design speed and pressure ratio, the flow was 4 percent greater than design, efficiency was 81 percent, and a stall margin of 24 percent was obtained. The stall line was improved with hub radial distortion but was reduced when the stage was tested with tip radial and circumferential flow distortions. Blade-to-blade values of static pressures were measured over the rotor blade tips.

Spanwise lift distributions and wake velocity surveys of a semi-span wing with a discontinuous twist

NASA Technical Reports Server (NTRS)

Kumagai, Hiroyuki

1989-01-01

A wind tunnel test was conducted in the NASA-Ames 7 x 10 ft wind tunnel to investigate the lift distribution on a semispan wing with a discontinuous change in spanwise twist. The semispan wing had a tip with an adjustable pitch angle independent on the inboard section pitch angle simulating the free tip rotor blade when its free tip is at a deflected position. The spanwise lift distribution over the wing and the tip were measured and three component velocity surveys behind the wing were obtained with a 3-D laser Doppler velocimeter (LV) with the wing at one angle of attack and the tip deflected at different pitch angles. A six-component internal strain gage balance was also used to measure total forces and moments on the tip. The 3-D lift was computed from the 2-D lift distributions obtained from the LV and from the strain gage balance. The results from both experimental methods are shown to be in agreement with predictions made by a steady, 3-D panel code, VSAERO.

Tip-enhanced near-field Raman spectroscopy with a scanning tunneling microscope and side-illumination optics.

PubMed

Yi, K J; He, X N; Zhou, Y S; Xiong, W; Lu, Y F

2008-07-01

Conventional Raman spectroscopy (RS) suffers from low spatial resolution and low detection sensitivity due to the optical diffraction limit and small interaction cross sections. It has been reported that a highly localized and significantly enhanced electromagnetic field could be generated in the proximity of a metallic tip illuminated by a laser beam. In this study, a tip-enhanced RS system was developed to both improve the resolution and enhance the detection sensitivity using the tip-enhanced near-field effects. This instrument, by combining RS with a scanning tunneling microscope and side-illumination optics, demonstrated significant enhancement on both optical sensitivity and spatial resolution using either silver (Ag)-coated tungsten (W) tips or gold (Au) tips. The sensitivity improvement was verified by observing the enhancement effects on silicon (Si) substrates. Lateral resolution was verified to be below 100 nm by mapping Ag nanostructures. By deploying the depolarization technique, an apparent enhancement of 175% on Si substrates was achieved. Furthermore, the developed instrument features fast and reliable optical alignment, versatile sample adaptability, and effective suppression of far-field signals.

Aeroelastic modeling of composite rotor blades with straight and swept tips

NASA Technical Reports Server (NTRS)

Yuan, Kuo-An; Friedmann, Peretz P.; Venkatesan, Comandur

1992-01-01

This paper presents an analytical study of the aeroelastic behavior of composite rotor blades with straight and swept tips. The blade is modeled by beam type finite elements. A single finite element is used to model the swept tip. The nonlinear equations of motion for the FEM are derived using Hamilton's principle and based on a moderate deflection theory and accounts for: arbitrary cross-sectional shape, pretwist, generally anisotropic material behavior, transverse shears and out-of-plane warping. Numerical results illustrating the effects of tip sweep, anhedral and composite ply orientation on blade aeroelastic behavior are presented. It is shown that composite ply orientation has a substantial effect on blade stability. At low thrust conditions, certain ply orientations can cause instability in the lag mode. The flap-torsion coupling associated with tip sweep can also induce aeroelastic instability in the blade. This instability can be removed by appropriate ply orientation in the composite construction. These results illustrate the inherent potential for aeroelastic tailoring present in composite rotor blades with swept tips, which still remains to be exploited in the design process.

Plasma etching of superconducting Niobium tips for scanning tunneling microscopy

DOE Office of Scientific and Technical Information (OSTI.GOV)

Roychowdhury, A.; Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742; Dana, R.

We have developed a reproducible technique for the fabrication of sharp superconducting Nb tips for scanning tunneling microscopy (STM) and scanning tunneling spectroscopy. Sections of Nb wire with 250 μm diameter are dry etched in an SF₆ plasma in a Reactive Ion Etcher. The gas pressure, etching time, and applied power are chosen to control the ratio of isotropic to anisotropic etch rates and produce the desired tip shape. The resulting tips are atomically sharp, with radii of less than 100 nm, mechanically stable, and superconducting. They generate good STM images and spectroscopy on single crystal samples of Au(111), Au(100),more » and Nb(100), as well as a doped topological insulator Bi₂Se₃ at temperatures ranging from 30 mK to 9 K.« less

Executive Skills for Busy School Leaders

ERIC Educational Resources Information Center

Hitch, Chris; Coley, David C.

2010-01-01

This comprehensive and practical handbook offers research-based tools to help you fulfill all of your leadership responsibilities on time and with laser-like focus. The authors also share tips from their combined experiences as elementary, middle, and high school principals. This book provides examples of best practices from the business and…

Interviewing under the ADA--What Librarians Should Know.

ERIC Educational Resources Information Center

Bishop, Barbara A.; Beadles, Robert J., Jr.

1995-01-01

Librarians responsible for interviewing prospective employees need to be aware of guidelines in the Americans with Disabilities Act of 1990 which prohibit certain recruiting practices. This article gives examples of questions employers should and should not ask, reviews pre- and postemployee interview steps, and offers tips and background…

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-18

An array of electric vehicles are on display for Kennedy Space Center employees during the center’s annual Earth Day celebration. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-17

During the annual Earth Day celebration at the Kennedy Space Center Visitor Complex, guests have an opportunity to learn about the environment. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Supporting Classroom Transitions between Daily Routines: Strategies and Tips

ERIC Educational Resources Information Center

Banerjee, Rashida; Horn, Eva

2013-01-01

The purpose of this article is to provide tools for preschool professionals to plan for transitions between daily routines, to identify challenging transitions during the day, and to offer strategies to support transitions in classrooms to prevent challenging behaviors from occurring due to frequent changes. Specifically, the authors answer three…

Direction-Giving Skills in the Classroom (A Teaching Tip).

ERIC Educational Resources Information Center

Ross, Charlynn

1992-01-01

Offers a unit on direction giving to help students identify effective and ineffective direction giving; become familiar with the preparation and presentation components of sound direction giving; and determine whether the message intended was the massage received. Discusses barriers to listening, misunderstandings, and provides exercises and steps…

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-18

Employees stop by the University of Florida's Institute of Food and Agricultural Sciences booth at Kennedy Space Center’s annual Earth Day celebration. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Battling Sexual Abuse

ERIC Educational Resources Information Center

Dessoff, Alan

2010-01-01

From costly lawsuits on behalf of victims to negative media coverage, districts can face potentially devastating consequences as a result of sexual abuse of their students by district employees. This article offers a few tips on how to battle sexual abuse particularly in school districts. The author stresses that by adopting strong policies that…

Promoting Lively Literature Discussion

ERIC Educational Resources Information Center

Gritter, Kristine

2011-01-01

When students create personal connections with literature during whole-class discussion, they make sense both of text and of their life experiences. In this article, the author shares tips that help students make text-to-self, text-to-world, and text-to-text connections. She offers classroom examples to illustrate how conversations that encourage…

Spin Cycle

ERIC Educational Resources Information Center

Casey, Dick

2005-01-01

Laundry equipment is an investment, and the investment should be protected. To keep laundry equipment working at an optimum level, schools must maintain their machines. This article offers preventive-maintenance tips for washing machines and dryers. To prevent faucets from binding up, close and reopen the water faucets. This also is a great way to…

Test Anxiety? Try a Stick of Gum...

ERIC Educational Resources Information Center

Wilmore, Elaine L.

American schools face pressure to increase their students' test scores. Research reports have shown American students to be particularly stressed over test taking partially because of other outside interests in their lives that also take up time. This paper offers tips to help students relieve stress arising from the testing situation. Students…

How the Brain Learns: A Classroom Teacher's Guide. Second Edition.

ERIC Educational Resources Information Center

Sousa, David A.

This book presents information to help teachers turn research on brain function into practical classroom activities and lessons, offering: brain facts; information on how the brain processes information; tips on maximizing retention; an information processing model that reflects new terminology regarding the memory systems; new research on how the…

Survival Guide for the First-Year Special Education Teacher. Revised Edition.

ERIC Educational Resources Information Center

Cohen, Mary Kemper; And Others

This guidebook offers practical advice to support special education teachers in their first year of teaching. The first chapter, "Getting Ready To Teach," outlines preparations necessary before school begins, such as organizing the classroom and establishing planning and record-keeping strategies. "Tips for the Classroom" lists what teachers…

Colostomy irrigation: are we offering it enough?

PubMed

Woodhouse, Fran

This article discusses the use of irrigation for suitable colostomists and reasons why it can have a very positive effect on lifestyle. While it is evidence-based it also includes anecdotal tips from patients who irrigate. The suitability of patients to irrigate and ways to 'get started' with irrigation are discussed.

"Borsenberichte": A Tip for Beginning Business German.

ERIC Educational Resources Information Center

Heinemann, Paul

1994-01-01

This paper discusses the reasons stock market reports of the type appearing in major newspapers in the German-speaking countries are ideal for beginning a text/unit sequence in an introductory business German course. Suggestions are offered concerning the in-class implementation of "Borsenberichte" for third-year students of German. (JL)

Seeking History: Teaching with Primary Sources in Grades 4-6.

ERIC Educational Resources Information Center

Edinger, Monica

This book offers ideas about using primary sources to enhance students' understandings of history. It discusses the following resources, methods, and ideas: types of primary sources; tips on finding and preparing primary sources for student use; personal, local, and remote history activities; detailed descriptions of diverse projects; guidelines…

Some Pragmatic Tips for Dealing with Clinical Uncertainty

ERIC Educational Resources Information Center

Ratner, Nan Bernstein

2011-01-01

Purpose: This article proposes some recommendations to enable clinicians to balance certainty and uncertainty when evaluating the currency and effectiveness of their treatment approaches. Method: I offer the following advice: (a) Question the authority of the information previously learned in one's career; (b) be cognizant of what we do not yet…

Best Practices for High School Classrooms: What Award-Winning Secondary Teachers Do.

ERIC Educational Resources Information Center

Stone, Randi

This book provides guidance on high-impact teaching practices, offering first-hand accounts of award-winning teachers. Nine chapters include: (1) "Award-Winning Words of Wisdom," with topics: "High School Teaching Tips" (Jenny W. Holmstrom); "What Is a Good Teacher?" (Carey Jenkins); "Student Creativity"…

Working in a Vacuum

ERIC Educational Resources Information Center

Rathey, Allen

2005-01-01

In this article, the author discusses several myths about vacuum cleaners and offers tips on evaluating and purchasing this essential maintenance tool. These myths are: (1) Amps mean performance; (2) Everyone needs high-efficiency particulate air (HEPA): (3) Picking up a "bowling ball" shows cleaning power; (4) All vacuum bags are the same; (5)…

The Fears and Anxieties of Gifted Learners: Tips for Parents and Educators

ERIC Educational Resources Information Center

Lamont, Renee T.

2012-01-01

Research indicates there may be a relationship between gifted learners and insomnia, fear, and anxiety. This article discusses current research on Dabrowski's overexcitabilities, asynchronous development, perfectionistic tendencies, and common fears of gifted learners. Suggestions for parents and teachers of gifted children are offered to help…

Virus Alert: Ten Steps to Safe Computing.

ERIC Educational Resources Information Center

Gunter, Glenda A.

1997-01-01

Discusses computer viruses and explains how to detect them; discusses virus protection and the need to update antivirus software; and offers 10 safe computing tips, including scanning floppy disks and commercial software, how to safely download files from the Internet, avoiding pirated software copies, and backing up files. (LRW)

#MoreThanEdChats

ERIC Educational Resources Information Center

Mieliwocki, Rebecca

2015-01-01

This article describes three reasons Twitter has become an essential part of US National Teacher of the Year Rebecca Mieliwocki's teaching life: (1) It provides professional development on demand by offering a steady stream of great new ideas, activities, lesson suggestions, book recommendations, and teaching tips that can be immediately…

Technical Writing Tips

ERIC Educational Resources Information Center

Kennedy, Patrick M.

2004-01-01

The main reason engineers, technicians, and programmers write poor technical documents is because they have had little training or experience in that area. This article addresses some of the basics that students can use to master technical writing tasks. The article covers the most common problems writers make and offers suggestions for improving…

Something's Underfoot.

ERIC Educational Resources Information Center

Morrow, Hugh

1997-01-01

Examines the decision-making factors when selecting school flooring. Areas to consider include what the area being covered is used for and the flooring's life-cycle costing. Suggestions on the types of flooring to consider are offered, as are tips on buying flooring made of recycled materials, and considerations for making the best overall…

Do Sweat the Small Stuff! Marketing That Matters.

ERIC Educational Resources Information Center

Wassom, Julie

1999-01-01

Provides tips for building enrollment in child care programs. Offers suggestions for the inquiry call, including enhancing the greeting, asking questions, and using prospect profiles; for the center visit, including treating visitors like welcome guests, meeting privately first, and asking questions; and for followup, including setting up a…

Survivor: The Library Edition

ERIC Educational Resources Information Center

Curzon, Susan Carol

2009-01-01

Six years ago, the author shared some strategies on managing a cutback ("Budget Shortfalls," "Library Journal" 5/15/03, p. 34-35). Now, people are in an even more severe economic downturn. In this article, the author offers some additional tips on how to cope with more budget shortfalls during this recession.

Library CPR: Savvy Marketing Can Save Your Library.

ERIC Educational Resources Information Center

Fleming, Helen Ruth

1993-01-01

Provides an overview of marketing efforts of the Public Library of Charlotte and Mecklenburg County. Examples of a marketing plan that stresses fostering relationships with the community are described, including staff training in customer service, a cultural festival, and services to the business community. A sidebar offers marketing tips for…

Implementing Inclusive Engineering Challenges for Elementary Students

ERIC Educational Resources Information Center

Silva Mangiante, Elaine; Moore, Adam

2015-01-01

The Next Generation Science Standards emphasize the need to promote equitable opportunities for all students to engage in science and engineering. This article offers eight tips that educators can use to support students of all abilities, including those with special learning needs, to engage in engineering challenges at the elementary level.

Bringing Stories to Life: Integrating Literature and Math Manipulatives

ERIC Educational Resources Information Center

Larson, Lotta C.; Rumsey, Chepina

2018-01-01

This Teaching Tip describes the use of children's literature to help second-grade students meet Common Core State Standards for English Language Arts and for Mathematics. During a shared reading experience, students used manipulatives to represent plot and characters while demonstrating mathematical reasoning. The article offers instructional…

Getting Started in Multimedia Training: Cutting or Bleeding Edge?

ERIC Educational Resources Information Center

Anderson, Vicki; Sleezer, Catherine M.

1995-01-01

Defines multimedia, explores uses of multimedia training, and discusses the effects and challenges of adding multimedia such as graphics, photographs, full motion video, sound effects, or CD-ROMs to existing training methods. Offers planning tips, and suggests software and hardware tools to help set up multimedia training programs. (JMV)

Cash for College.

ERIC Educational Resources Information Center

National Association of Student Financial Aid Administrators, Washington, DC.

This booklet contains answers to questions that students may ask about financial aid for college. The booklet describes the usual costs of college, and suggests ways students can pay for a college education. The types of financial aid available are described, and the application process is outlined. The booklet offers tips for comparing different…

Assistive Technology: Tips, Tools, and Techniques. A Parent Resource Manual.

ERIC Educational Resources Information Center

Wilcox, M. Jeanne; Norman-Murch, Trudi; Oberstein, Jill S.; Volkmann, Melody A.; Wagner, Deanna K.; Musselwhite, Caroline Ramsey; Malena, Edye; Weber, Carolyn A.

Designed for parents of children who have a wide variety of disabilities, this manual discusses the ways in which assistive technology can facilitate the child's active participation in developmentally appropriate activities and offers ideas for incorporating devices and strategies into daily school and home routines. The manual attempts to…

Finding Your Way in the Legislation Maze: How To Pass Legislation in Your State.

ERIC Educational Resources Information Center

Gross, Steve

1997-01-01

Offers tips for developing and passing legislation that would protect animals. Recommends being an authority on the issue, researching current laws, recognizing support groups and lobbyists, and knowing key legislative players. Contains a description of laws passed in the state of Illinois. (PVD)

Distance Running and the Elementary-Age Child

ERIC Educational Resources Information Center

Jenny, Seth; Armstrong, Tess

2013-01-01

Distance running is often underutilized in elementary physical education due to three common misconceptions about using this activity with young children: (1) it is not enjoyable, (2) it is not safe, and (3) children will get mentally "burned out." Through reviewing the literature and offering guidelines, practical tips, instant…

STEVE -- User Guide and Reference Manual

NASA Astrophysics Data System (ADS)

Fish, Adrian

This document describes an extended version of the EVE editor that has been tailored to the general Starlink user's requirements. This extended editor is STarlink Eve or STEve, and this document (along with it's introductory companion SUN/125) describes this editor, and offers additional help, advice and tips on general EVE usage.

A Note on Economic Content and Test Validity.

ERIC Educational Resources Information Center

Soper, John C.; Brenneke, Judith Staley

1987-01-01

Offers practical tips on how teachers can determine whether classroom tests are actually measuring what they are designed to measure. Discusses criterion-related validity, construct validity, and content validity. Demonstrates how to determine the degree of content validity a particular test may have for a particular course or unit. (Author/DH)

Using Multicultural Children's Literature to Teach Diverse Perspectives

ERIC Educational Resources Information Center

Iwai, Yuko

2015-01-01

As increasing numbers of students from diverse cultures are entering schools, educators need to include diversity in their teaching to promote diverse perspectives and help students become global citizens. The author offers tips for elementary teachers on using multicultural children's literature in their classrooms. Teachers are encouraged to…

UPRIGHT CANNON AND HEADSTONES IN SECTION SW. VIEW TO NORTHWEST. ...

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

UPRIGHT CANNON AND HEADSTONES IN SECTION SW. VIEW TO NORTHWEST. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

Take Care of Your Teeth and Gums

MedlinePlus

... This Topic En español Take Care of Your Teeth and Gums Browse Sections The Basics Overview Take ... Brushing Tips 3 of 5 sections Take Action: Dental Checkups Get regular checkups at the dentist. Visit ...

Variation in human fungiform taste bud densities among regions and subjects.

PubMed

Miller, I J

1986-12-01

Taste sensitivity is known to vary among regions of the tongue and between subjects. The distribution of taste buds on the human tongue is examined in this report to determine if interregional and intersubject variation of taste bud density might account for some of the variation in human taste sensitivity. The subjects were ten males, aged 22-80 years, who died from acute trauma or an acute cardiovascular episode. Specimens were obtained as anatomical gifts or from autopsy. A sample of tissue about 1 cm2 was taken from the tongue tip and midlateral region; frozen sections were prepared for light microscopy; and serial sections were examined by light microscopy to count the taste buds. The average taste bud (tb) density on the tongue tip was 116 tb/cm2 with a range from 3.6 to 514 among subjects. The number of gustatory papillae on the tip averaged 24.5 papillae/cm2 with a range from 2.4 to 80. Taste bud density in the midregion averaged 25.2 tb/cm2 (range: 0-85.9), and the mean number of gustatory papillae was 8.25/cm2 (range: 0-28). The mean number of taste buds per papilla was 3.8 +/- 2.2 (s.d.) on the tip and 2.6 +/- 1.5 (s.d.) on the midregion. Subjects with the highest taste bud densities on the tip also had the highest densities in the midregion and the highest number of taste buds per papilla. Taste bud density was 4.6 times higher on the tip than the midregion, which probably accounts for some of the regional difference in taste sensitivity.(ABSTRACT TRUNCATED AT 250 WORDS)

Dispersion of near-infrared laser energy through radicular dentine when using plain or conical tips.

PubMed

Teo, Christine Yi Jia; George, Roy; Walsh, Laurence J

2018-02-01

The aim of this study was to investigate the influence of tip design on patterns of laser energy dispersion through the dentine of tooth roots when using near-infrared diode lasers. Diode laser emissions of 810 or 940 nm were used in combination with optical fiber tips with either conventional plain ends or conical ends, to irradiate tooth roots of oval or round cross-sectional shapes. The lasers were operated in continuous wave mode at 0.5 W for 5 s with the distal end of the fiber tip placed in the apical or coronal third of the root canal at preset positions. Laser light exiting through the roots and apical foramen was imaged, and the extent of lateral spread calculated. There was a significant difference in infrared light exiting the root canal apex between plain and conical fiber tips for both laser wavelengths, with more forward transmission of laser energy through the apex for plain tips. For both laser wavelengths, there were no significant differences in emission patterns when the variable of canal shape was used and all other variables were kept the same (plain vs conical tip, tip position). To ensure optimal treatment effect and to prevent the risks of inadvertent laser effects on the adjacent periapical tissues, it is important to have a good understanding of laser transmission characteristics of the root canal and root dentine. Importantly, it is also essential to understand transmission characteristics of plain and conical fibers tips.

Tips for Energy Savers In and Around the Home, On the Road, In the Marketplace. Don't Be Fuelish.

ERIC Educational Resources Information Center

Federal Energy Administration, Washington, DC.

This pamphlet presents simple suggestions for energy conservation. Sections include: (1) In and around the home; (2) Using the family car; and (3) In the marketplace. The suggestions given are mostly common sense tips like dressing appropriately for either hot or cold weather, use electrical appliances and lights sparingly and at off-peak times,…

26 CFR 31.6053-3 - Reporting by certain large food or beverage establishments with respect to tips.

Code of Federal Regulations, 2011 CFR

2011-04-01

... name and social security number of each employee of the establishment during the calendar year to whom...-2 for whom an allocation was made. A copy of any written good faith agreements applicable to a given... early W-2 the employee's actual tip allocation under section 6053(c), if known, or a good faith estimate...

26 CFR 31.6053-3 - Reporting by certain large food or beverage establishments with respect to tips.

Code of Federal Regulations, 2013 CFR

2013-04-01

... name and social security number of each employee of the establishment during the calendar year to whom...-2 for whom an allocation was made. A copy of any written good faith agreements applicable to a given... early W-2 the employee's actual tip allocation under section 6053(c), if known, or a good faith estimate...

26 CFR 31.6053-3 - Reporting by certain large food or beverage establishments with respect to tips.

Code of Federal Regulations, 2010 CFR

2010-04-01

... name and social security number of each employee of the establishment during the calendar year to whom...-2 for whom an allocation was made. A copy of any written good faith agreements applicable to a given... early W-2 the employee's actual tip allocation under section 6053(c), if known, or a good faith estimate...

26 CFR 31.6053-3 - Reporting by certain large food or beverage establishments with respect to tips.

Code of Federal Regulations, 2012 CFR

2012-04-01

... name and social security number of each employee of the establishment during the calendar year to whom...-2 for whom an allocation was made. A copy of any written good faith agreements applicable to a given... early W-2 the employee's actual tip allocation under section 6053(c), if known, or a good faith estimate...

26 CFR 31.6053-3 - Reporting by certain large food or beverage establishments with respect to tips.

Code of Federal Regulations, 2014 CFR

2014-04-01

... name and social security number of each employee of the establishment during the calendar year to whom...-2 for whom an allocation was made. A copy of any written good faith agreements applicable to a given... early W-2 the employee's actual tip allocation under section 6053(c), if known, or a good faith estimate...

Twelve tips for overnight teaching.

PubMed

Richards, Jeremy B; Wilcox, Susan R; Roberts, David H; Schwartzstein, Richard M

2014-03-01

The European Working Time Directive and the United States' duty hour restrictions have changed resident physicians' schedules, specifically increasing overnight shifts and decreasing overall time spent in the hospital. As residents' perception of night shifts is that they have little educational value, efforts to improve educational opportunities and night attending teaching are desirable. However, resources about and recommendations for best practices for overnight teaching by faculty are scarce. To provide 12 tips to highlight strategies intended to optimize attending physicians' overnight teaching skills and strategies. The tips provided are based on our experiences and reflections as in-house faculty supervising residents working overnight, by our experience and group discussions as medical educators, and the available literature. The 12 tips presented offer specific strategies to optimize attending physicians' overnight teaching for resident physicians, specifically highlighting the unique logistics, pedagogy and follow-up of overnight teaching. Preparation for teaching is important in any environment, but understanding the unique timing and circumstances associated with overnight teaching is vital to ensure that overnight teaching is effective. Acknowledging and addressing the physical and cognitive obstacles associated with overnight teaching and learning is necessary to maximize the educational value of overnight teaching.

Sensitivity of collective action to uncertainty about climate tipping points

NASA Astrophysics Data System (ADS)

Barrett, Scott; Dannenberg, Astrid

2014-01-01

Despite more than two decades of diplomatic effort, concentrations of greenhouse gases continue to trend upwards, creating the risk that we may someday cross a threshold for `dangerous' climate change. Although climate thresholds are very uncertain, new research is trying to devise `early warning signals' of an approaching tipping point. This research offers a tantalizing promise: whereas collective action fails when threshold uncertainty is large, reductions in this uncertainty may bring about the behavioural change needed to avert a climate `catastrophe'. Here we present the results of an experiment, rooted in a game-theoretic model, showing that behaviour differs markedly either side of a dividing line for threshold uncertainty. On one side of the dividing line, where threshold uncertainty is relatively large, free riding proves irresistible and trust illusive, making it virtually inevitable that the tipping point will be crossed. On the other side, where threshold uncertainty is small, the incentive to coordinate is strong and trust more robust, often leading the players to avoid crossing the tipping point. Our results show that uncertainty must be reduced to this `good' side of the dividing line to stimulate the behavioural shift needed to avoid `dangerous' climate change.

An Interprofessional Web-Based Resource for Health Professions Preceptors

PubMed Central

McLeod, Elizabeth; Kwong, Mona; Tidball, Glynnis; Collins, John; Neufeld, Lois; Drynan, Donna

2012-01-01

Objective. To develop a Web-based preceptor education resource for healthcare professionals and evaluate its usefulness. Methods. Using an open source platform, 8 online modules called “E-tips for Practice Education” (E-tips) were developed that focused on topics identified relevant across healthcare disciplines. A cross-sectional survey design was used to evaluate the online resource. Ninety preceptors from 10 health disciplines affiliated with the University of British Columbia evaluated the E-tips. Results. The modules were well received by preceptors, with all participants indicating that they would recommend these modules to their colleagues, over 80% indicating the modules were very to extremely applicable, and over 60% indicating that E-tips had increased their confidence in their ability to teach. Conclusion. Participants reported E-tips to be highly applicable to their teaching role as preceptors. Given their multidisciplinary focus, these modules address a shared language and ideas about clinical teaching among those working in multi-disciplinary settings. PMID:23193332

Turbine blade tip flow discouragers

DOEpatents

Bunker, Ronald Scott

2000-01-01

A turbine assembly comprises a plurality of rotating blade portions in a spaced relation with a stationery shroud. The rotating blade portions comprise a root section, a tip portion and an airfoil. The tip portion has a pressure side wall and a suction side wall. A number of flow discouragers are disposed on the blade tip portion. In one embodiment, the flow discouragers extend circumferentially from the pressure side wall to the suction side wall so as to be aligned generally parallel to the direction of rotation. In an alternative embodiment, the flow discouragers extend circumferentially from the pressure side wall to the suction side wall so as to be aligned at an angle in the range between about 0.degree. to about 60.degree. with respect to a reference axis aligned generally parallel to the direction of rotation. The flow discouragers increase the flow resistance and thus reduce the flow of hot gas flow leakage for a given pressure differential across the blade tip portion so as to improve overall turbine efficiency.

WOMEN VETERANS MEMORIAL BETWEEN SECTIONS Y AND Z. VIEW TO ...

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

WOMEN VETERANS MEMORIAL BETWEEN SECTIONS Y AND Z. VIEW TO SOUTHWEST. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

WOMEN VETERANS MEMORIAL BETWEEN SECTIONS Y AND Z. VIEW TO ...

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

WOMEN VETERANS MEMORIAL BETWEEN SECTIONS Y AND Z. VIEW TO NORTHEAST. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

SECTION G FROM SOUTH DRIVE, SHOWING UPRIGHT HEADSTONES. VIEW TO ...

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

SECTION G FROM SOUTH DRIVE, SHOWING UPRIGHT HEADSTONES. VIEW TO SOUTH. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

The aerodynamic properties of thick aerofoils suitable for internal bracing

NASA Technical Reports Server (NTRS)

Norton, F H

1920-01-01

The object of this investigation was to determine the characteristics of various types of wings having sufficient depth to entirely inclose the wing bracing, and also to provide data for the further design of such sections. This type of wing is of interest because it eliminates the resistance of the interplane bracing, a portion of the airplane that sometimes absorbs one-quarter of the total power required to fly, and because these wings may be made to give a very high maximum lift. Results of the investigation of the following subjects are given: (1) effect of changing the upper and lower camber of thick aerofoils of uniform section; (2) effect of thickening the center and thinning the tips of a thin aerofoil; (3) effect of adding a convex lower surface to a tapered section; (4) effect of changing the mean thickness with constant center and tip sections; and (5) effect of varying the chord along the span.

Protective sheath for a continuous measurement thermocouple

DOEpatents

Phillippi, R.M.

1991-12-03

Disclosed is a protective thermocouple sheath of a magnesia graphite refractory material for use in continuous temperature measurements of molten metal in a metallurgical ladle and having a basic slag layer thereon. The sheath includes an elongated torpedo-shaped sheath body formed of a refractory composition and having an interior borehole extending axially therethrough and adapted to receive a thermocouple. The sheath body includes a lower end which is closed about the borehole and forms a narrow, tapered tip. The sheath body also includes a first body portion integral with the tapered tip and having a relatively constant cross section and providing a thin wall around the borehole. The sheath body also includes a second body portion having a relatively constant cross section larger than the cross section of the first body portion and providing a thicker wall around the borehole. The borehole terminates in an open end at the second body portion. The tapered tip is adapted to penetrate the slag layer and the thicker second body portion and its magnesia constituent material are adapted to withstand chemical attack thereon from the slag layer. The graphite constituent improves thermal conductivity of the refractory material and, thus, enhances the thermal responsiveness of the device. 4 figures.

Protective sheath for a continuous measurement thermocouple

DOEpatents

Phillippi, R. Michael

1991-01-01

Disclosed is a protective thermocouple sheath of a magnesia graphite refractory material for use in continuous temperature measurements of molten metal in a metallurgical ladle and having a basic slag layer thereon. The sheath includes an elongated torpedo-shaped sheath body formed of a refractory composition and having an interior borehole extending axially therethrough and adapted to receive a thermocouple. The sheath body includes a lower end which is closed about the borehole and forms a narrow, tapered tip. The sheath body also includes a first body portion integral with the tapered tip and having a relatively constant cross section and providing a thin wall around the borehole. The sheath body also includes a second body portion having a relatively constant cross section larger than the cross section of the first body portion and providing a thicker wall around the borehole. The borehole terminates in an open end at the second body portion. The tapered tip is adapted to penetrate the slag layer and the thicker second body portion and its magnesia constituent material are adapted to withstand chemical attack thereon from the slag layer. The graphite constituent improves thermal conductivity of the refractory material and, thus, enhances the thermal responsiveness of the device.

Twelve tips for successful e-tutoring using electronic portfolios.

PubMed

Deketelaere, Ann; Degryse, Jan; De Munter, Agnes; De Leyn, Paul

2009-06-01

E-tutoring by means of a digital portfolio offers personal guidance in a context in which regular face-to-face contact between supervisor and student is difficult. However, implementing e-tutoring in practice is not always straightforward. This article investigates the conditions for successful e-tutoring of electronic portfolios. A combination of three methods is used: our own experience with e-tutoring, interviews with 14 tutors using an e-portfolio and the answers on questionnaires by 107 students. We present 12 tips to increase the chances of successful e-tutoring when using electronic portfolios. E-tutoring by means of electronic portfolios can be a feasible alternative in contexts in which face-to-face tutoring is difficult.

Span-Load Distribution as a Factor in Stability in Roll

NASA Technical Reports Server (NTRS)

Knight, Montgomery; Noyes, Richard W

1932-01-01

This report gives the results of pressure-distribution tests made to study the effects on lateral stability of changing the span-load distribution on a rectangular monoplane wing model of fairly thick section. Three methods of changing the distribution were employed: variation in profile along the span to a thin symmetrical section at the tip, twist from +5 degrees to -15 degrees at the tip, and sweepback from +20 degrees to -20 degrees. The tests were conducted in a 5-foot closed-throat atmospheric wind tunnel. The investigation shows the following results: (1) change in profile along the span from the NACA-84 at the root to the NACA-M2 at the tip considerably reduces lateral instability, but also reduces the general effectiveness of the wing. (2) washout up to 11 degrees progressively reduces maximum lateral instability. (3) transition from sweepforward to sweepback gradually reduces the useful angle-of-attack range, but has no clearly defined effect on maximum lateral instability.

The dynamic inducer as a cost-effective wind turbine system

NASA Astrophysics Data System (ADS)

Gyatt, G.; Zalay, A.

The efficacy of dynamic inducer tip vanes, short airfoil sections attached perpendicularly at the outer end of wind turbine rotors, were investigated analytically and experimentally. The airfoil section is oriented to lift toward the center of the rotor, thereby forcing a greater flow toward the center of the actuator disk. Also, since the vortex shed by one tip vane posterior edge is exactly opposite in sign to the vortex produced at the anterior edge of the immediately preceeding vane, a synchronous state arises wherein drag on the tip vanes is eliminated. A numerical model was developed for the wind turbine power coefficient in a synchronous state. The simulation indicated that more kinetic energy than present in the actuator disk alone can be captured. Design features of the blades and fairing are described. Dynamic inducer WECS were projected to cost 20% less than equivalent conventional horizontal axis machines, while power augmentation can approach 70%, thus exceeding the Betz limit.

A Microwave Blade Tip Clearance Sensor for Propulsion Health Monitoring

NASA Technical Reports Server (NTRS)

Woike, Mark R.; Abdul-Aziz, Ali; Bencic, Timothy J.

2010-01-01

Microwave sensor technology is being investigated by the NASA Glenn Research Center as a means of making non-contact structural health measurements in the hot sections of gas turbine engines. This type of sensor technology is beneficial in that it is accurate, it has the ability to operate at extremely high temperatures, and is unaffected by contaminants that are present in turbine engines. It is specifically being targeted for use in the High Pressure Turbine (HPT) and High Pressure Compressor (HPC) sections to monitor the structural health of the rotating components. It is intended to use blade tip clearance to monitor blade growth and wear and blade tip timing to monitor blade vibration and deflection. The use of microwave sensors for this application is an emerging concept. Techniques on their use and calibration needed to be developed. As a means of better understanding the issues associated with the microwave sensors, a series of experiments have been conducted to evaluate their performance for aero engine applications. This paper presents the results of these experiments.

Simulation and characterization of silicon-based 0.5-MHz ultrasonic nozzles

NASA Astrophysics Data System (ADS)

Song, Y. L.; Tsai, S. C.; Chen, W. J.; Chou, Y. F.; Tseng, T. K.; Tsai, C. S.

2004-01-01

This paper compares the simulation results with the experimental results of impedance analysis and longitudinal vibration measurement of micro-fabricated 0.5 MHz silicon-based ultrasonic nozzles. Impedance analysis serves as a good diagnostic tool for evaluation of longitudinal vibration of the nozzles. Each nozzle is made of a piezoelectric drive section and a silicon-resonator consisting of multiple Fourier horns each with half wavelength design and twice amplitude magnification. The experimental results verified the simulation prediction of one pure longitudinal vibration mode at the resonant frequency in excellent agreement with the design value. Furthermore, at the resonant frequency, the measured longitudinal vibration amplitude gain at the nozzle tip increases as the number of Fourier horns (n) increases in good agreement with the theoretical value of 2n. Using this design, very high vibration amplitude at the nozzle tip can be achieved with no reduction in the tip cross sectional area. Therefore, the required electric drive power should be drastically reduced, decreasing the likelihood of transducer failure in ultrasonic atomization.

SECTIONS T AND S FROM NORTH DRIVE, SHOWING UPRIGHT HEADSTONES. ...

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

SECTIONS T AND S FROM NORTH DRIVE, SHOWING UPRIGHT HEADSTONES. VIEW TO SOUTH. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

SECTION D, WITH FLAT GROUP BURIAL MARKER AT RIGHT FOREGROUND. ...

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

SECTION D, WITH FLAT GROUP BURIAL MARKER AT RIGHT FOREGROUND. VIEW TO NORTHWEST. - Rock Island National Cemetery, Rock Island Arsenal, 0.25 mile north of southern tip of Rock Island, Rock Island, Rock Island County, IL

[Detection of single-walled carbon nanotube bundles by tip-enhanced Raman spectroscopy].

PubMed

Wu, Xiao-Bin; Wang, Jia; Wang, Rui; Xu, Ji-Ying; Tian, Qian; Yu, Jian-Yuan

2009-10-01

Raman spectroscopy is a powerful technique in the characterization of carbon nanotubes (CNTs). However, this spectral method is subject to two obstacles. One is spatial resolution, namely the diffraction limits of light, and the other is its inherent small Raman cross section and weak signal. To resolve these problems, a new approach has been developed, denoted tip-enhanced Raman spectroscopy (TERS). TERS has been demonstrated to be a powerful spectroscopic and microscopic technique to characterize nanomaterial or nanostructures. Excited by a focused laser beam, an enhanced electric field is generated in the vicinity of a metallic tip because of the surface plasmon polariton (SPP) and lightening rod effect. Consequently, Raman signal from the sample area illuminated by the enhanced field nearby the tip is enhanced. At the same time, the topography is obtained in the nanometer scale. The exact corresponding relationship between the localized Raman and the topography makes the Raman identification at the nanometer scale to be feasible. In the present paper, based on an inverted microscope and a metallic AFM tip, a tip-enhanced Raman system was set up. The radius of the Au-coated metallic tip is about 30 nm. The 532 nm laser passes through a high numerical objective (NA0.95) from the bottom to illuminate the tip to excite the enhanced electric field. Corresponding with the AFM image, the tip-enhanced near-field Raman of a 100 nm diameter single-walled carbon nanotube (SWNT) bundles was obtained. The SWNTs were prepared by arc method. Furthermore, the near-field Raman of about 3 SWNTs of the bundles was received with the spatial resolution beyond the diffraction limit. Compared with the far-field Raman, the enhancement factor of the tip-enhanced Raman is more than 230. With the super-diffraction spatial resolution and the tip-enhanced Raman ability, tip-enhanced Raman spectroscopy will play an important role in the nano-material and nano-structure characterization.

Toughness-Dominated Regime of Hydraulic Fracturing in Cohesionless Materials

NASA Astrophysics Data System (ADS)

Germanovich, L. N.; Hurt, R. S.; Ayoub, J.; Norman, W. D.

2011-12-01

This work examines the mechanisms of hydraulic fracturing in cohesionless particulate materials with geotechnical, geological, and petroleum applications. For this purpose, experimental techniques have been developed, and used to quantify the initiation and propagation of hydraulic fractures in saturated particulate materials. The fracturing liquid is injected into particulate materials, which are practically cohesionless. The liquid flow is localized in thin self-propagating crack-like conduits. By analogy we call them 'cracks' or 'hydraulic fractures.' When a fracture propagates in a solid, new surfaces are created by breaking material bonds. Consequently, the material is in tension at the fracture tip. Because the particulate material is already 'fractured,' no new surface is created and no fracturing process per se is involved. Therefore, the conventional fracture mechanics principles cannot be directly applied. Based on the laboratory observations, performed on three particulate materials (Georgia Red Clay, silica flour, and fine sand, and their mixtures), this work offers physical concepts to explain the observed phenomena. The goal is to determine the controlling parameters of fracture behavior and to quantify their effects. An important conclusion of our work is that all parts of the cohesionless particulate material (including the tip zone of hydraulic fracture) are likely to be in compression. The compressive stress state is an important characteristic of hydraulic fracturing in particulate materials with low, or no, cohesion (such as were used in our experiments). At present, two kinematic mechanisms of fracture propagation, consistent with the compressive stress regime, can be offered. The first mechanism is based on shear bands propagating ahead of the tip of an open fracture. The second is based on the tensile strain ahead of the fracture tip and reduction of the effective stresses to zero within the leak-off zone. Scaling indicates that in our experiments, there is a high pressure gradient in the leak-off zone in the direction normal to the fracture. Fluid pressure does not decrease considerably along the fracture, however, due to the relatively wide fracture aperture. This suggests that hydraulically induced fractures in unconsolidated materials may be considered to be within the toughness-dominated regime of hydraulic fracturing. Our results indicate that the primary influence on peak or initiation pressure comes from the remote stresses. However, fracture morphology changes significantly with other chosen parameters (stress, flow rate, rheology and permeability). Additionally, an important characteristic feature of fractures in our experiments is the frequent bluntness of the fracture tip, which suggests that plastic deformation at the fracture tip is important. Modeling shows that large openings at the fracture tip correspond to relatively large 'effective' fracture (surface) energy, which can be orders of magnitude greater than for typical (solid) rocks.

Modulating capacitive response of MoS2 flake by controlled nanostructuring through focused laser irradiation.

PubMed

Rani, Renu; Kundu, Anirban; Balal, Mohammad; Sheet, Goutam; Hazra, Kiran Shankar

2018-08-24

Unlike graphene nanostructures, various physical properties of nanostructured MoS 2 have remained unexplored due to the lack of established fabrication routes. Herein, we have reported unique electrostatic properties of MoS 2 nanostructures, fabricated in a controlled manner of different geometries on 2D flake by using focused laser irradiation technique. Electrostatic force microscopy has been carried out on MoS 2 nanostructures by varying tip bias voltage and lift height. The analysis depicts no contrast flip in phase image of the patterned nanostructure due to the absence of free surface charges. However, prominent change in phase shift at the patterned area is observed. Such contrast changes signify the capacitive interaction between tip and nanostructures at varying tip bias voltage and lift height, irrespective of their shape and size. Such unperturbed capacitive behavior of the MoS 2 nanostructures offer modulation of capacitance in periodic array on 2D MoS 2 flake for potential application in capacitive devices.

Monolithic methacrylate packed 96-tips for high throughput bioanalysis.

PubMed

Altun, Zeki; Skoglund, Christina; Abdel-Rehim, Mohamed

2010-04-16

In the pharmaceutical industry the growing number of samples to be analyzed requires high throughput and fully automated analytical techniques. Commonly used sample-preparation methods are solid-phase extraction (SPE), liquid-liquid extraction (LLE) and protein precipitation. In this paper we will discus a new sample-preparation technique based on SPE for high throughput drug extraction developed and used by our group. This new sample-preparation method is based on monolithic methacrylate polymer as packing sorbent for 96-tip robotic device. Using this device a 96-well plate could be handled in 2-4min. The key aspect of the monolithic phase is that monolithic material can offer both good binding capacity and low back-pressure properties compared to e.g. silica phases. The present paper presents the successful application of monolithic 96-tips and LC-MS/MS by the sample preparation of busulphan, rescovitine, metoprolol, pindolol and local anaesthetics from human plasma samples and cyklophosphamid from mice blood samples. Copyright 2009 Elsevier B.V. All rights reserved.

Distributed collaborative probabilistic design for turbine blade-tip radial running clearance using support vector machine of regression

NASA Astrophysics Data System (ADS)

Fei, Cheng-Wei; Bai, Guang-Chen

2014-12-01

To improve the computational precision and efficiency of probabilistic design for mechanical dynamic assembly like the blade-tip radial running clearance (BTRRC) of gas turbine, a distribution collaborative probabilistic design method-based support vector machine of regression (SR)(called as DCSRM) is proposed by integrating distribution collaborative response surface method and support vector machine regression model. The mathematical model of DCSRM is established and the probabilistic design idea of DCSRM is introduced. The dynamic assembly probabilistic design of aeroengine high-pressure turbine (HPT) BTRRC is accomplished to verify the proposed DCSRM. The analysis results reveal that the optimal static blade-tip clearance of HPT is gained for designing BTRRC, and improving the performance and reliability of aeroengine. The comparison of methods shows that the DCSRM has high computational accuracy and high computational efficiency in BTRRC probabilistic analysis. The present research offers an effective way for the reliability design of mechanical dynamic assembly and enriches mechanical reliability theory and method.

Imaging of viscoelastic soft matter with small indentation using higher eigenmodes in single-eigenmode amplitude-modulation atomic force microscopy.

PubMed

Nikfarjam, Miead; López-Guerra, Enrique A; Solares, Santiago D; Eslami, Babak

2018-01-01

In this short paper we explore the use of higher eigenmodes in single-eigenmode amplitude-modulation atomic force microscopy (AFM) for the small-indentation imaging of soft viscoelastic materials. In viscoelastic materials, whose response depends on the deformation rate, the tip-sample forces generated as a result of sample deformation increase as the tip velocity increases. Since the eigenfrequencies in a cantilever increase with eigenmode order, and since higher oscillation frequencies lead to higher tip velocities for a given amplitude (in viscoelastic materials), the sample indentation can in some cases be reduced by using higher eigenmodes of the cantilever. This effect competes with the lower sensitivity of higher eigenmodes, due to their larger force constant, which for elastic materials leads to greater indentation for similar amplitudes, compared with lower eigenmodes. We offer a short theoretical discussion of the key underlying concepts, along with numerical simulations and experiments to illustrate a simple recipe for imaging soft viscoelastic matter with reduced indentation.

Aeroelasticity and structural optimization of composite helicopter rotor blades with swept tips

NASA Technical Reports Server (NTRS)

Yuan, K. A.; Friedmann, P. P.

1995-01-01

This report describes the development of an aeroelastic analysis capability for composite helicopter rotor blades with straight and swept tips, and its application to the simulation of helicopter vibration reduction through structural optimization. A new aeroelastic model is developed in this study which is suitable for composite rotor blades with swept tips in hover and in forward flight. The hingeless blade is modeled by beam type finite elements. A single finite element is used to model the swept tip. Arbitrary cross-sectional shape, generally anisotropic material behavior, transverse shears and out-of-plane warping are included in the blade model. The nonlinear equations of motion, derived using Hamilton's principle, are based on a moderate deflection theory. Composite blade cross-sectbnal properties are calculated by a separate linear, two-dimensional cross section analysis. The aerodynamic loads are obtained from quasi-steady, incompressible aerodynamics, based on an implicit formulation. The trim and steady state blade aeroelastic response are solved in a fully coupled manner. In forward flight, where the blade equations of motion are periodic, the coupled trim-aeroelastic response solution is obtained from the harmonic balance method. Subsequently, the periodic system is linearized about the steady state response, and its stability is determined from Floquet theory.

Survival Guide for the First-Year Special Education Teacher.

ERIC Educational Resources Information Center

Carballo, Julie Berchtold; And Others

This book offers guidelines to support beginning special education teachers in their first year of teaching. "Getting Ready To Teach" covers things to do before school begins, such as organizing the classroom and establishing planning and record-keeping strategies. "Tips for the Classroom" focuses on surviving the first day, establishing classroom…

How to Identify High-Growth Schools

ERIC Educational Resources Information Center

Pfeiffer, Linda E.

2015-01-01

When researching school options, parents may want to look for schools with high-growth scores which, according to research, may be indicators of other characteristics such as programming, leadership, culture, and size. This quick guide offers parents tips on how to identify high-growth schools and what to ask when evaluating school options. An…

Children's Writer's and Illustrator's Market.

ERIC Educational Resources Information Center

Buening, Alice P., Ed.

The 1997 edition of this annual directory contains more than 800 listings in the children's book market; more than 150 of these listings are new with this edition, and nearly all the listings have been updated. The directory provides the standard addresses, contacts and query tips, but it also offers the publishers' electronic mail addresses and…

'Tween Crayons and Curfews: Tips for Middle School Teachers

ERIC Educational Resources Information Center

Wolpert-Gawron, Heather

2011-01-01

Teach well. Be happy. In this book, Heather Wolpert-Gawron, author of the popular education blog "Tweenteacher" shares ideas for teaching an age group that too often presents a challenge for educators. With sparkling humor and a unique, fundamental understanding of the middle children of education, the award-winning teacher offers tried-and-true…

Let's Team Up! A Checklist for Paraeducators, Teachers and Principals. NEA Checklist Series.

ERIC Educational Resources Information Center

Gerlach, Kent

This checklist is designed to help paraeducators, teachers, and principals understand their roles and responsibilities as they relate to each other. It offers tips for teachers on working effectively with paraeducators, practical suggestions for paraeducators on clarifying their jobs and relationships with students and school staff, and advice for…

CPTED 101: Crime Prevention through Environmental Design--The Fundamentals for Schools

ERIC Educational Resources Information Center

Schneider, Tod

2010-01-01

Crime Prevention through Environmental Design (CPTED) 101 applies to both new and existing schools and is built on three simple concepts: natural surveillance, natural access control, and territoriality. If a school's layout seems unsafe, adopting a few CPTED fundamentals may help make it significantly safer. This paper offers some tips for making…

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-17

During the annual Earth Day celebration at the Kennedy Space Center Visitor Complex, guests have an opportunity to learn more about energy awareness, the environment and sustainability. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-18

Employees had the opportunity to take a look under the hood of an electric vehicle on display during Kennedy Space Center’s annual Earth Day celebration. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-17

During the annual Earth Day celebration at the Kennedy Space Center Visitor Complex, guests have an opportunity to get an up-close look at experimental electric vehicles. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-18

An employee learns about indoor air quality at the Kennedy Space Center (KSC) Environmental and Medical Contract (KEMCON) booth at the center’s annual Earth Day celebration. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-17

During the annual Earth Day celebration at the Kennedy Space Center Visitor Complex, guests have an opportunity to learn about the environment and meet Butterfly Dan” Dunwoody. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Political Correctness as an Academic Discipline

ERIC Educational Resources Information Center

Klatt, Heinz-Joachim

2003-01-01

Administrative approval of his proposed course on political correctness came as a surprise to Heinz Klatt, a veteran of many run-ins with the PC establishment. Professor Klatt describes the genesis and nature of his course and offers tips that may come in handy for those who would replicate such studies elsewhere. (Contains 4 notes.)

Cutting Costs, Keeping Quality: Financing Strategies for Youth-Serving Organizations in a Difficult Economy

ERIC Educational Resources Information Center

Keller, Eric

2010-01-01

This research brief highlights three effective financing strategies that successful youth-serving organizations are using to maintain quality services despite difficult economic times. The brief provides examples of how organizations have implemented these strategies and offers tips to help leaders consider how best to adapt these strategies to…

Bed Bug Education for School Maintenance

ERIC Educational Resources Information Center

Henriksen, Missy

2012-01-01

Bed bugs are a growing problem, not only in homes and hotels, but also in schools and colleges. Facility administrators and staff need to understand the bed bug resurgence and develop best practices to deal with an infestation. In this article, the author offers tips for preventing and treating bed bugs in school and university settings.

What the Federal Government Owes Student Borrowers

ERIC Educational Resources Information Center

Combe, Paul

2009-01-01

This nation's federal student-loan system has reached a tipping point that, with the new leadership in Washington, offers a rare opportunity to create real change. To create a more consumer-focused student-loan program with both public and private capital, the Education Department, lenders, colleges in both programs, guarantors, and others should…

Benefits of social media for nurses and service users.

PubMed

Betton, Victoria is deputy; Tomlinson, Victoria

People with mental health problems are increasingly using social media channels as part of their recovery and to improve their lives. This article discusses social media and how it can be used to complement healthcare, offers useful tips on using social media, and explores case studies for nurses to use in clinical practice.

Tips for Finding the Right Partner. A TASC Resource Guide

ERIC Educational Resources Information Center

ExpandED Schools, 2014

2014-01-01

ExpandED Schools (formerly TASC) has spent the past 17 years helping schools and community organizations find the right partners. This resource guide offers a guide to the strategic questions school teams might ask themselves and their potential partners to have the best outcomes for young people. The following attachment is included: School…

Tips to Increase Girls' Participation in Flag Football Units

ERIC Educational Resources Information Center

Hannon, James C.; Ratliffe, Thomas

2006-01-01

Despite the apparent popularity of flag football as an activity in physical education class and football as an after-school offering for girls, studies related to gender stereotyping of sports have found overwhelming evidence indicating that football is perceived as a masculine activity among males and females in primary school, secondary school,…

10 Tips for Parents: How to Get Kids to Eat More Complex Carbohydrates.

ERIC Educational Resources Information Center

PTA Today, 1991

1991-01-01

Offers 10 suggestions to help parents encourage their children to eat more complex carbohydrates. Suggestions include microwaving baked potatoes; baking whole-grain breads; snacking on gingersnaps, fig bars, pretzels, or vegetable sticks; mixing cereal into low-fat yogurt; and making soup containing beans, rice, pasta, or potatoes. (SM)

It's Never Too Late! What Neuroscience Has to Offer High Schools.

ERIC Educational Resources Information Center

Greenleaf, Robert K.

1999-01-01

Debunks brain/education myths. The term "brain-based education" is redundant; learning is the brain's function. More brain cell connections do not equal more learning. There is no "critical period" for developing human brain capacity. All learning is emotional, and learning never ends. Tips for high-school teachers are…

Playing with Plug-ins

ERIC Educational Resources Information Center

Thompson, Douglas E.

2013-01-01

In today's complex music software packages, many features can remain unexplored and unused. Software plug-ins--available in most every music software package, yet easily overlooked in the software's basic operations--are one such feature. In this article, I introduce readers to plug-ins and offer tips for purchasing plug-ins I have…

The Boys and Girls of Summer: Baseball Theme Programming Tips To Catch Young Readers.

ERIC Educational Resources Information Center

Kaplan, Paul

1999-01-01

Offers suggestions for library programs with a baseball theme, including tying into hobbies such as collecting baseball cards; a young peoples book discussion; trivia contests using different reference sources; letter writing to favorite players; bibliographies and displays; hosting former players; women in baseball; and the Negro Leagues. (LRW)

Using Stories Effectively with Infants and Toddlers

ERIC Educational Resources Information Center

Birckmayer, Jennifer; Kennedy, Anne; Stonehouse, Anne

2009-01-01

In this excerpt from the book "From Lullabies to Literature: Stories in the Lives of Infants and Toddlers," the authors offer dos and don'ts for sharing story experiences with very young children. They include tips such as keeping groups intimate, showing pleasure and enthusiasm, being expressive, and using props. The authors suggest story…

Planning Good Days for Children with ADHD: Tips for Parents.

ERIC Educational Resources Information Center

Brozovich, Richard; And Others

Practical suggestions are offered for parents of children with attention deficit hyperactivity disorder (ADHD) for managing the behavior of their children through the use of positive and negative consequences. Suggestions focus on the child getting up in the morning, getting ready for school, homework, chores, dinner time, free time, bed time,…

Once Upon an HRD Book Club.

ERIC Educational Resources Information Center

Bonner, Dede; Tarner, Liz

1999-01-01

Shares experiences of a human resource development (HRD) book group. Offers practical startup tips, descriptions of different types of book groups, and lessons learned about such groups. Suggests that membership on an HRD book group is an opportunity for self-directed learning in a social context, and it fosters a mindset for lifelong learning.…

After-School Toolkit: Tips, Techniques and Templates for Improving Program Quality

ERIC Educational Resources Information Center

Gutierrez, Nora; Bradshaw, Molly; Furano, Kathryn

2008-01-01

This toolkit offers program managers a hands-on guide for implementing quality programming in the after-school hours. The kit includes tools and techniques that increased the quality of literacy programming and helped improve student reading gains in the Communities Organizing Resources to Advance Learning (CORAL) initiative of The James Irvine…

Partnering with the Local Livestock Market in Educational Programs.

ERIC Educational Resources Information Center

Jenkins, Jamie H.; Newman, Michael E.; Castellaw, Jimmy C.; Lane, Clyde D., Jr.

2000-01-01

Survey responses from 62 of 96 cattle producers evaluated educational methods of the extension service and the livestock market. Methods included tips distributed with the sale check, monthly and sale day programs, and Second Saturday cattle working program. The combination of programs offered influenced them to make changes in their production…

Does Your Health Plan Measure Up? How Can You Tell?

ERIC Educational Resources Information Center

Edwards, Tom

1999-01-01

Describes the process behind health-plan selection for school district employees and offers suggestions on how managers might enhance their current healthcare plan purchasing process. Areas of health-plan review and critique are listed as are tips for measuring plan performance and advice on acquiring backup data on plan quality. (GR)

Hot Tips for Teachers. Staff Development Series. [Videotape].

ERIC Educational Resources Information Center

TV Ontario, Toronto.

This 15-minute videotape offers a motivational staff development program for teachers. Four segments focus on: (1) preparing for the teacher's absence (e.g., knowing the school's policy and protocol, preparing a safety kit for the substitute teacher, and keeping a box of learning materials available for the substitute); (2) effective learning…

Developing a Promotional Video

ERIC Educational Resources Information Center

Epley, Hannah K.

2014-01-01

There is a need for Extension professionals to show clientele the benefits of their program. This article shares how promotional videos are one way of reaching audiences online. An example is given on how a promotional video has been used and developed using iMovie software. Tips are offered for how professionals can create a promotional video and…

Enhance Your Twitter Experience

ERIC Educational Resources Information Center

Miller, Shannon McClintock

2010-01-01

The author has been encouraging teachers, students, and others to join Twitter and build their personal learning networks (PLNs) ever since she delved into this great social networking site. In this article, she offers a few other tools and tips that can improve the Twitter experience of those who have opened up an account and dabbled a bit but…

Creating a Winning Game Plan. The Secondary Teacher's Playbook.

ERIC Educational Resources Information Center

Gose, Michael D.

This book offers strategies for high school teachers that provide tools for creating, repairing, and tweaking all the discernible components of teaching. The book is organized to move from context to teaching to discipline to thriving in teaching. The book includes tips on how to minimize discipline problems with effective curriculum and sound…

Planning a Sabbatical? These Tips Can Save Taxes.

ERIC Educational Resources Information Center

Matoney, Joseph P., Jr.; Weston, Marilyn

1985-01-01

Information on potential tax-saving opportunities when planning a sabbatical is provided for college personnel. Advice is offered about tax savings for: rental of the academician's personal residences while away from home, the home office deduction, use of an auto, and foreign income tax exclusion. The answer to what expenses are deductible…

Blade pitch optimization methods for vertical-axis wind turbines

NASA Astrophysics Data System (ADS)

Kozak, Peter

Vertical-axis wind turbines (VAWTs) offer an inherently simpler design than horizontal-axis machines, while their lower blade speed mitigates safety and noise concerns, potentially allowing for installation closer to populated and ecologically sensitive areas. While VAWTs do offer significant operational advantages, development has been hampered by the difficulty of modeling the aerodynamics involved, further complicated by their rotating geometry. This thesis presents results from a simulation of a baseline VAWT computed using Star-CCM+, a commercial finite-volume (FVM) code. VAWT aerodynamics are shown to be dominated at low tip-speed ratios by dynamic stall phenomena and at high tip-speed ratios by wake-blade interactions. Several optimization techniques have been developed for the adjustment of blade pitch based on finite-volume simulations and streamtube models. The effectiveness of the optimization procedure is evaluated and the basic architecture for a feedback control system is proposed. Implementation of variable blade pitch is shown to increase a baseline turbine's power output between 40%-100%, depending on the optimization technique, improving the turbine's competitiveness when compared with a commercially-available horizontal-axis turbine.

Managing the star performer.

PubMed

Hills, Laura

2013-01-01

Our culture seems to be endlessly fascinated with its stars in entertainment, athletics, politics, and business, and holds fast to the idea that extraordinary talent accounts for an individual's extraordinary performance. At first glance, managing a star performer in your medical practice may seem like it would be an easy task. However, there's much more to managing a star performer than many practice managers realize. The concern is how to keep the star performer happy and functioning at a high level without detriment to the rest of the medical practice team. This article offers tips for practice managers who manage star performers. It explores ways to keep the star performer motivated, while at the same time helping the star performer to meld into the existing medical practice team. This article suggests strategies for redefining the star performer's role, for holding the star performer accountable for his or her behavior, and for coaching the star performer. Finally, this article offers practical tips for keeping the star performer during trying times, for identifying and cultivating new star performers, and for managing medical practice prima donnas.

Trade-offs in sensitivity and sampling depth in bimodal atomic force microscopy and comparison to the trimodal case

PubMed Central

Eslami, Babak; Ebeling, Daniel

2014-01-01

Summary This paper presents experiments on Nafion® proton exchange membranes and numerical simulations illustrating the trade-offs between the optimization of compositional contrast and the modulation of tip indentation depth in bimodal atomic force microscopy (AFM). We focus on the original bimodal AFM method, which uses amplitude modulation to acquire the topography through the first cantilever eigenmode, and drives a higher eigenmode in open-loop to perform compositional mapping. This method is attractive due to its relative simplicity, robustness and commercial availability. We show that this technique offers the capability to modulate tip indentation depth, in addition to providing sample topography and material property contrast, although there are important competing effects between the optimization of sensitivity and the control of indentation depth, both of which strongly influence the contrast quality. Furthermore, we demonstrate that the two eigenmodes can be highly coupled in practice, especially when highly repulsive imaging conditions are used. Finally, we also offer a comparison with a previously reported trimodal AFM method, where the above competing effects are minimized. PMID:25161847

Rhinoplasty. The difficult nasal tip: total resection of the alar cartilages.

PubMed

Rodriguez-Camps, Salvador

2009-01-01

There are many ways to reconstruct and make nasal tips more attractive. Sometimes we cannot find the best way unless we at least remove all surplus from the tip. This may occur in primary or secondary rhinoplasty. In principle, anything is possible when relocating and reconstructing. However, sometimes we face reality when we uncover the tip: broken or bulging cartilages that are difficult to put right. For this reason, in 1987 we thought of totally resectioning the alar cartilages in a case of secondary rhinoplasty with an unsightly appearance. After a year the result was seen to be correct from an aesthetic and a functional perspective and is still so today. Aesthetically, it kept its shape and did not collapse with nasal respiratory failure. We covered the end of the crus medialis with a small, temporary, one- to two-layered fascia patch. Except in exceptional cases, we now use this procedure: Total sectioning of the alar cartilages including the domes, or maintenance of them by preserving the fibroadipose tip tissue with a suture in the middle of the end of the crus medialis and by covering this with temporary fascia, which usually has two layers depending on the thickness of the skin of the tip. This procedure is indicated mainly in secondary rhinoplasty when the cartilages of the tip are completely destroyed, and in primary rhinoplasty when the tip is excessively wide and bulbous. Our philosophy is, therefore, elegance and beauty of the nasal tip with a solid and equilateral base without prejudices.

A combined piezoelectric composite actuator and its application to wing/blade tips

NASA Astrophysics Data System (ADS)

Ha, Kwangtae

A novel combined piezoelectric-composite actuator configuration is proposed and analytically modeled in this work. The actuator is a low complexity, active compliant mechanism obtained by coupling a modified star cross sectional configuration composite beam with a helicoidal bimorph piezoelectric actuator coiled around it. This novel actuator is a good candidate as a hinge tension-torsion bar actuator for a helicopter rotor blade flap or blade tip and mirror rotational positioning. In the wing tip case, the tip deflection angle is different only according to the aerodynamic moment depending on the hinge position of the actuator along the chord and applied voltage because there is no centrifugal force. For an active blade tip subject to incompressible flow and 2D quasi steady airloads, its twist angle is related not only to aerodynamic moment and applied voltage but also to coupling terms, such as the trapeze effect and the tennis racquet effect. Results show the benefit of hinge position aft of the aerodynamic center, such that the blade tip response is amplified by airloads. Contrary to this effect, results also show that the centrifugal effects and inertial effect cause an amplitude reduction in the response. Summation of these effects determines the overall blade tip response. The results for a certain hinge position of Xh=1.5% chord aft of the quarter chord point proves that the tip deflection target design range of beta ∈ [-2,+2] can be achieved for all pitch angle configurations chosen.

Full data acquisition in Kelvin Probe Force Microscopy: Mapping dynamic electric phenomena in real space

DOE Office of Scientific and Technical Information (OSTI.GOV)

Balke, Nina; Kalinin, Sergei V.; Jesse, Stephen

Kelvin probe force microscopy (KPFM) has provided deep insights into the role local electronic, ionic and electrochemical processes play on the global functionality of materials and devices, even down to the atomic scale. Conventional KPFM utilizes heterodyne detection and bias feedback to measure the contact potential difference (CPD) between tip and sample. This measurement paradigm, however, permits only partial recovery of the information encoded in bias- and time-dependent electrostatic interactions between the tip and sample and effectively down-samples the cantilever response to a single measurement of CPD per pixel. This level of detail is insufficient for electroactive materials, devices, ormore » solid-liquid interfaces, where non-linear dielectrics are present or spurious electrostatic events are possible. Here, we simulate and experimentally validate a novel approach for spatially resolved KPFM capable of a full information transfer of the dynamic electric processes occurring between tip and sample. General acquisition mode, or G-Mode, adopts a big data approach utilising high speed detection, compression, and storage of the raw cantilever deflection signal in its entirety at high sampling rates (> 4 MHz), providing a permanent record of the tip trajectory. We develop a range of methodologies for analysing the resultant large multidimensional datasets involving classical, physics-based and information-based approaches. Physics-based analysis of G-Mode KPFM data recovers the parabolic bias dependence of the electrostatic force for each cycle of the excitation voltage, leading to a multidimensional dataset containing spatial and temporal dependence of the CPD and capacitance channels. We use multivariate statistical methods to reduce data volume and separate the complex multidimensional data sets into statistically significant components that can then be mapped onto separate physical mechanisms. Overall, G-Mode KPFM offers a new paradigm to study dynamic electric phenomena in electroactive interfaces as well as offer a promising approach to extend KPFM to solid-liquid interfaces.« less

Full data acquisition in Kelvin Probe Force Microscopy: Mapping dynamic electric phenomena in real space

DOE PAGES

Balke, Nina; Kalinin, Sergei V.; Jesse, Stephen; ...

2016-08-12

Kelvin probe force microscopy (KPFM) has provided deep insights into the role local electronic, ionic and electrochemical processes play on the global functionality of materials and devices, even down to the atomic scale. Conventional KPFM utilizes heterodyne detection and bias feedback to measure the contact potential difference (CPD) between tip and sample. This measurement paradigm, however, permits only partial recovery of the information encoded in bias- and time-dependent electrostatic interactions between the tip and sample and effectively down-samples the cantilever response to a single measurement of CPD per pixel. This level of detail is insufficient for electroactive materials, devices, ormore » solid-liquid interfaces, where non-linear dielectrics are present or spurious electrostatic events are possible. Here, we simulate and experimentally validate a novel approach for spatially resolved KPFM capable of a full information transfer of the dynamic electric processes occurring between tip and sample. General acquisition mode, or G-Mode, adopts a big data approach utilising high speed detection, compression, and storage of the raw cantilever deflection signal in its entirety at high sampling rates (> 4 MHz), providing a permanent record of the tip trajectory. We develop a range of methodologies for analysing the resultant large multidimensional datasets involving classical, physics-based and information-based approaches. Physics-based analysis of G-Mode KPFM data recovers the parabolic bias dependence of the electrostatic force for each cycle of the excitation voltage, leading to a multidimensional dataset containing spatial and temporal dependence of the CPD and capacitance channels. We use multivariate statistical methods to reduce data volume and separate the complex multidimensional data sets into statistically significant components that can then be mapped onto separate physical mechanisms. Overall, G-Mode KPFM offers a new paradigm to study dynamic electric phenomena in electroactive interfaces as well as offer a promising approach to extend KPFM to solid-liquid interfaces.« less

Section 508 Standards

EPA Pesticide Factsheets

Guidelines, design tips, and tools for ensuring that all Information and Communications Technology; including websites, software, hardware, multimedia, and telecommunication; is accessible to disabled users.

Self-sensing cantilevers with integrated conductive coaxial tips for high-resolution electrical scanning probe metrology

DOE Office of Scientific and Technical Information (OSTI.GOV)

Haemmerli, Alexandre J.; Pruitt, Beth L., E-mail: pruitt@stanford.edu; Harjee, Nahid

The lateral resolution of many electrical scanning probe techniques is limited by the spatial extent of the electrostatic potential profiles produced by their probes. Conventional unshielded conductive atomic force microscopy probes produce broad potential profiles. Shielded probes could offer higher resolution and easier data interpretation in the study of nanostructures. Electrical scanning probe techniques require a method of locating structures of interest, often by mapping surface topography. As the samples studied with these techniques are often photosensitive, the typical laser measurement of cantilever deflection can excite the sample, causing undesirable changes electrical properties. In this work, we present the design,more » fabrication, and characterization of probes that integrate coaxial tips for spatially sharp potential profiles with piezoresistors for self-contained, electrical displacement sensing. With the apex 100 nm above the sample surface, the electrostatic potential profile produced by our coaxial tips is more than 2 times narrower than that of unshielded tips with no long tails. In a scan bandwidth of 1 Hz–10 kHz, our probes have a displacement resolution of 2.9 Å at 293 K and 79 Å at 2 K, where the low-temperature performance is limited by amplifier noise. We show scanning gate microscopy images of a quantum point contact obtained with our probes, highlighting the improvement to lateral resolution resulting from the coaxial tip.« less

Blade tip timing (BTT) uncertainties

NASA Astrophysics Data System (ADS)

Russhard, Pete

2016-06-01

Blade Tip Timing (BTT) is an alternative technique for characterising blade vibration in which non-contact timing probes (e.g. capacitance or optical probes), typically mounted on the engine casing (figure 1), and are used to measure the time at which a blade passes each probe. This time is compared with the time at which the blade would have passed the probe if it had been undergoing no vibration. For a number of years the aerospace industry has been sponsoring research into Blade Tip Timing technologies that have been developed as tools to obtain rotor blade tip deflections. These have been successful in demonstrating the potential of the technology, but rarely produced quantitative data, along with a demonstration of a traceable value for measurement uncertainty. BTT technologies have been developed under a cloak of secrecy by the gas turbine OEM's due to the competitive advantages it offered if it could be shown to work. BTT measurements are sensitive to many variables and there is a need to quantify the measurement uncertainty of the complete technology and to define a set of guidelines as to how BTT should be applied to different vehicles. The data shown in figure 2 was developed from US government sponsored program that bought together four different tip timing system and a gas turbine engine test. Comparisons showed that they were just capable of obtaining measurement within a +/-25% uncertainty band when compared to strain gauges even when using the same input data sets.

A Mobile App Offering Distractions and Tips to Cope With Cigarette Craving: A Qualitative Study

PubMed Central

Smith, Wally; Pearce, Jon; Borland, Ron

2014-01-01

Background Despite considerable effort, most smokers relapse within a few months after quitting due to cigarette craving. The widespread adoption of mobile phones presents new opportunities to provide support during attempts to quit. Objective To design and pilot a mobile app "DistractMe" to enable quitters to access and share distractions and tips to cope with cigarette cravings. Methods A qualitative study with 14 smokers who used DistractMe on their mobiles during the first weeks of their quit attempt. Based on interviews, diaries, and log data, we examined how the app supported quitting strategies. Results Three distinct techniques of coping when using DistractMe were identified: diversion, avoidance, and displacement. We further identified three forms of engagement with tips for coping: preparation, fortification, and confrontation. Overall, strategies to prevent cravings and their effects (avoidance, displacement, preparation, and fortification) were more common than immediate coping strategies (diversion and confrontation). Tips for coping were more commonly used than distractions to cope with cravings, because they helped to fortify the quit attempt and provided opportunities to connect with other users of the application. However, distractions were important to attract new users and to facilitate content sharing. Conclusions Based on the qualitative results, we recommend that mobile phone-based interventions focus on tips shared by peers and frequent content updates. Apps also require testing with larger groups of users to assess whether they can be self-sustaining. PMID:25099632

Fine-Scale Mechanical Properties of Sliding Solids.

DTIC Science & Technology

1987-02-28

experiments to be described, the tip was prepared by chemical polishing or electropolishing and welded to a loop of wire that could be resistively heated in...attach the sample to a wire mesh that could be resistively heated itself to high temperatures. Where neither of these methods were appropriate...section welded to the tip wire . The reflected beam is focussed onto an optical detector (also outside the chamber) which is sensitive to small changes

Time Dependence of Tip Morphology during Cellular/Dendritic Arrayed Growth

NASA Technical Reports Server (NTRS)

Song, H.; Tewari, S. N.

1996-01-01

Succinonitrile-1.9 wt pct acetone has been directionally solidified in 0.7 X 0.7-cm-square cross section pyrex ampoules in order to observe the cell/dendrite tip morphologies, not influenced by the 'wall effects', which are present during growth in the generally used thin (about 200 gm) crucibles. The tips do not maintain a steady-state shape, as is generally assumed. Instead, they fluctuate within a shape envelope. The extent of fluctuation increases with decreasing growth speed, as the micro structure changes from the dendritic to cellular. The influence of natural convection has been examined by comparing these morphologies with those grown, without convection, in the thin ampoules.

EUS Needle Identification Comparison and Evaluation study (with videos).

PubMed

Tang, Shou-Jiang; Vilmann, Andreas S; Saftoiu, Adrian; Wang, Wanmei; Streba, Costin Teodor; Fink, Peter P; Griswold, Michael; Wu, Ruonan; Dietrich, Christoph F; Jenssen, Christian; Hocke, Michael; Kantowski, Marcus; Pohl, Jürgen; Fockens, Paul; Annema, Jouke T; van der Heijden, Erik H F M; Havre, Roald Flesland; Pham, Khanh Do-Cong; Kunda, Rastislav; Deprez, Pierre H; Mariana, Jinga; Vazquez-Sequeiros, Enrique; Larghi, Alberto; Buscarini, Elisabetta; Fusaroli, Pietro; Lahav, Maor; Puri, Rajesh; Garg, Pramod Kumar; Sharma, Malay; Maluf-Filho, Fauze; Sahai, Anand; Brugge, William R; Lee, Linda S; Aslanian, Harry R; Wang, Andrew Y; Shami, Vanessa M; Markowitz, Arnold; Siddiqui, Ali A; Mishra, Girish; Scheiman, James M; Isenberg, Gerard; Siddiqui, Uzma D; Shah, Raj J; Buxbaum, James; Watson, Rabindra R; Willingham, Field F; Bhutani, Manoop S; Levy, Michael J; Harris, Cynthia; Wallace, Michael B; Nolsøe, Christian Pállson; Lorentzen, Torben; Bang, Niels; Sørensen, Sten Mellerup; Gilja, Odd Helge; D'Onofrio, Mirko; Piscaglia, Fabio; Gritzmann, Norbert; Radzina, Maija; Sparchez, Zeno Adrian; Sidhu, Paul S; Freeman, Simon; McCowan, Timothy C; de Araujo, Cyrillo Rodrigues; Patel, Akash; Ali, Mohammad Adel; Campbell, Garth; Chen, Edward; Vilmann, Peter

2016-09-01

EUS-guided FNA or biopsy sampling is widely practiced. Optimal sonographic visualization of the needle is critical for image-guided interventions. Of the several commercially available needles, bench-top testing and direct comparison of these needles have not been done to reveal their inherent echogenicity. The aims are to provide bench-top data that can be used to guide clinical applications and to promote future device research and development. Descriptive bench-top testing and comparison of 8 commonly used EUS-FNA needles (all size 22 gauge): SonoTip Pro Control (Medi-Globe); Expect Slimline (Boston Scientific); EchoTip, EchoTip Ultra, EchoTip ProCore High Definition (Cook Medical); ClearView (Conmed); EZ Shot 2 (Olympus); and BNX (Beacon Endoscopic), and 2 new prototype needles, SonoCoat (Medi-Globe), coated by echogenic polymers made by Encapson. Blinded evaluation of standardized and unedited videos by 43 EUS endoscopists and 17 radiologists specialized in GI US examination who were unfamiliar with EUS needle devices. There was no significant difference in the ratings and rankings of these needles between endosonographers and radiologists. Overall, 1 prototype needle was rated as the best, ranking 10% to 40% higher than all other needles (P < .01). Among the commercially available needles, the EchoTip Ultra needle and the ClearView needle were top choices. The EZ Shot 2 needle was ranked statistically lower than other needles (30%-75% worse, P < .001). All FNA needles have their inherent and different echogenicities, and these differences are similarly recognized by EUS endoscopists and radiologists. Needles with polymeric coating from the entire shaft to the needle tip may offer better echogenicity. Copyright © 2016 American Society for Gastrointestinal Endoscopy. All rights reserved.

Dynamics of Isolated Tip Vortex Cavitation

NASA Astrophysics Data System (ADS)

Pennings, Pepijn; Bosschers, Johan; van Terwisga, Tom

2014-11-01

Performance of ship propellers and comfort levels in the surroundings are limited by various forms of cavitation. Amongst these forms tip vortex cavitation is one of the first appearing forms and is expected to be mainly responsible for the emission of broadband pressure fluctuations typically occurring between the 4th to the 7th blade passing frequency (approx. 40--70 Hz). These radiated pressure pulses are likely to excite parts of the hull structure resulting in a design compromise between efficiency and comfort. Insight is needed in the mechanism of acoustic emission from the oscillations by a tip vortex cavity. In the current experimental study the tip vortex cavity from a blade with an elliptic planform and sections based on NACA 662 - 415 with meanline a = 0 . 8 is observed using high speed shadowgraphy in combination with blade force and acoustic measurements. An analytic model describing three main cavity deformation modes is verified and used to explain the origin of a cavity eigenfrequency or ``vortex singing'' phenomenon observed by Maines and Arndt (1997) on the tip vortex cavity originating from the same blade. As no hydrodynamic sound originating from the tip vortex cavity was observed it is posed that a tip flow instability is essential for ``vortex singing.'' This research was funded by the Lloyd's Register Foundation as part of the International Institute for Cavitation Research.

10 Tips to Reduce Your Chance of Losing Vision from the Most Common Cause of Blindness

MedlinePlus

... 2019 Basic and Clinical Science Course, Section 02: Fundamentals and Principles of Ophthalmology 2018-2019 Basic and ... 2019 Basic and Clinical Science Course, Section 02: Fundamentals and Principles of Ophthalmology Print 2018-2019 Basic ...

Aerodynamic effect of a honeycomb rotor tip shroud on a 50.8-centimeter-tip-diameter core turbine

NASA Technical Reports Server (NTRS)

Moffitt, T. P.; Whitney, W. J.

1983-01-01

A 50.8-cm-tip-diameter turbine equipped with a rotor tip shroud of hexagonal cell (or honeycomb) cross section has been tested in warm air (416 K) for a range of shroud coolant to primary flow rates. Test results were also obtained for the same turbine operated with a solid shroud for comparison. The results showed that the combined effect of the honeycomb shroud and the coolant flow was to cause a reduction of 2.8 points in efficiency at design speed, pressure ratio, and coolant flow rate. With the coolant system inactivated, the honeycomb shroud caused a decrease in efficiency of 2.3 points. These results and those obtained from a small reference turbine indicate that the dominant factor governing honeycomb tip shroud loss is the ratio of honeycomb depth to blade span. The loss results of the two shrouds could be correlated on this basis. The same honeycomb and coolant effects are expected to occur for the hot (2200 K) version of this turbine.

Wind Tunnel Evaluation of a Model Helicopter Main-Rotor Blade With Slotted Airfoils at the Tip

NASA Technical Reports Server (NTRS)

Noonan, Kevin W.; Yeager, William T., Jr.; Singleton, Jeffrey D.; Wilbur, Matthew L.; Mirick, Paul H.

2001-01-01

Data for rotors using unconventional airfoils are of interest to permit an evaluation of this technology's capability to meet the U.S. Army's need for increased helicopter mission effectiveness and improved safety and survivability. Thus, an experimental investigation was conducted in the Langley Transonic Dynamics Tunnel (TDT) to evaluate the effect of using slotted airfoils in the rotor blade tip region (85 to 100 percent radius) on rotor aerodynamic performance and loads. Four rotor configurations were tested in forward flight at advance ratios from 0.15 to 0.45 and in hover in-ground effect. The hover tip Mach number was 0.627, which is representative of a design point of 4000-ft geometric altitude and a temperature of 95 F. The baseline rotor configuration had a conventional single-element airfoil in the tip region. A second rotor configuration had a forward-slotted airfoil with a -6 deg slat, a third configuration had a forward-slotted airfoil with a -10 slat, and a fourth configuration had an aft-slotted airfoil with a 3 deg flap (trailing edge down). The results of this investigation indicate that the -6 deg slat configuration offers some performance and loads benefits over the other three configurations.

Bandlike Transport in Ferroelectric-Based Organic Field-Effect Transistors

NASA Astrophysics Data System (ADS)

Laudari, A.; Guha, S.

2016-10-01

The dielectric constant of polymer-ferroelectric dielectrics may be tuned by changing the temperature, offering a platform for monitoring changes in interfacial transport with the polarization strength in organic field-effect transistors (FETs). Temperature-dependent transport studies of FETs are carried out from a solution-processed organic semiconductor, 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene), using both ferroelectric- and nonferroelectric-gate insulators. Nonferroelectric dielectric-based TIPS-pentacene FETs show a clear activated transport, in contrast to the ferroelectric dielectric polymer, poly(vinylidene fluoride-trifluoroethylene), where a negative temperature coefficient of the mobility is observed in the ferroelectric temperature range. The current-voltage (I -V ) characteristics from TIPS-pentacene diodes signal a space-charge-limited conduction (SCLC) for a discrete set of trap levels, suggesting that charge injection and transport occurs through regions of ordering in the semiconductor. The carrier mobility extracted from temperature-dependent I -V characteristics from the trap-free SCLC region shows a negative coefficient beyond 200 K, similar to the trend observed in FETs with the ferroelectric dielectric. At moderate temperatures, the polarization-fluctuation-dominant transport inherent in a ferroelectric dielectric, in conjunction with the nature of traps, results in an effective detrapping of the shallow-trap states into more mobile states in TIPS-pentacene.

Porous titanium particles for acetabular reconstruction in total hip replacement show extensive bony armoring after 15 weeks

PubMed Central

Walschot, Lucas H B; Aquarius, René; Verdonschot, Nico; Buma, Pieter

2014-01-01

Background and purpose — The bone impaction grafting technique restores bone defects in total hip replacement. Porous titanium particles (TiPs) are deformable, like bone particles, and offer better primary stability. We addressed the following questions in this animal study: are impacted TiPs osteoconductive under loaded conditions; do released micro-particles accelerate wear; and are systemic titanium blood levels elevated after implantation of TiPs? Animals and methods — An AAOS type-III defect was created in the right acetabulum of 10 goats weighing 63 (SD 6) kg, and reconstructed with calcium phosphate-coated TiPs and a cemented polyethylene cup. A stem with a cobalt chrome head was cemented in the femur. The goats were killed after 15 weeks. Blood samples were taken pre- and postoperatively. Results — The TiP-graft layer measured 5.6 (SD 0.8) mm with a mean bone ingrowth distance of 2.8 (SD 0.8) mm. Cement penetrated 0.9 (0.3–1.9) mm into the TiPs. 1 reconstruction showed minimal cement penetration (0.3 mm) and failed at the cement-TiP interface. There were no signs of accelerated wear, metallic particle debris, or osteolysis. Median systemic titanium concentrations increased on a log-linear scale from 0.5 (0.3–1.1) parts per billion (ppb) to 0.9 (0.5–2.8) ppb (p = 0.01). Interpretation — Adequate cement pressurization is advocated for impaction grafting with TiPs. After implantation, calcium phosphate-coated TiPs were osteoconductive under loaded conditions and caused an increase in systemic titanium concentrations. However, absolute levels remained low. There were no signs of accelerated wear. A clinical pilot study should be performed to prove that application in humans is safe in the long term. PMID:25238431

High Tunnel versus Open Field: Management of Primocane-fruiting Blackberry Using Pruning and Tipping to Increase Yield and Extend the Fruiting Season

USDA-ARS?s Scientific Manuscript database

Primocane-fruiting blackberries may offer opportunities for season extension and off-season fruit productionivation. ‘Prime-Jan’® plants were established at the Oregon State University - North Willamette Research and Extension Center, Aurora, Ore. (NWREC). Half of the planting was established under...

Seeking Scholarships: Application Tips for Graduate and Undergraduate Studies in Health and Physical Education.

ERIC Educational Resources Information Center

Okeke, Maria U.; Geiger, Brian F.

This collection of 31 presentation slides provides suggestions for students applying for health and physical education scholarships, offering guidelines and specific resource information. It focuses on myths (e.g., scholarships only go to the best students, obtaining a loan decreases the chances of receiving a scholarship, and paying for a…

Flight to Success: A Collection of Lists Created for Today's Business World.

ERIC Educational Resources Information Center

Corder, Lloyd E., Comp.

This guide suggests ways to improve communication skills for those individuals just starting out in the business world. The guide offers advice from an abundance of sources condensed into easy-to-follow lists on the subjects of: (1) dress tips for men and women; (2) introductions; (3) remembering people's names; (4) conversational techniques for…

Has Corpus-Based Instruction Reached a Tipping Point? Practical Applications and Pointers for Teachers

ERIC Educational Resources Information Center

Huang, Li-Shih

2017-01-01

This article provides an easy introduction into corpus-based instruction by explaining what the approach entails. It also presents key terms and discusses key theoretical concepts drawn from the literature; from these, practical applications and pointers are offered for those practitioners wishing to use corpus data or implement corpus-based…

'Experiencing' the Unthinkable: By Simulating Emergencies, We Show Staff Members how to Deal with Them, when and if They Should Occur.

ERIC Educational Resources Information Center

Kolb, David C.

1989-01-01

Suggests staging simulated accidents for emergency planning and training. Describes planning and staging simulated accidents for outdoor programs. Offers tips on role playing and how to create imitation "wounds." Describes implementation of plan, emphasizing value of proper supervision and evaluation upon completion. (TES)

Awakening the Sleeping Giant: Helping Teachers Develop as Leaders. Second Edition.

ERIC Educational Resources Information Center

Katzenmayer, Marilyn; Moller, Gayle

This book presents updated research on and examples of teacher leadership, offering practical tips for educators at all levels, tools for self-assessment, and a new vision of the future. The eight chapters are: (1) "What Is Teacher Leadership?" (e.g., definition of teacher leadership, roles for teacher leaders, and who is responsible); (2)…

Real Jobs for Real People. An Employer's Guide to Youth Apprenticeship.

ERIC Educational Resources Information Center

Byrne, Sandra; And Others

Based on the experience of the National Alliance of Business' youth apprenticeship program (the Quality Connection Consortium), this guide offers practical advice on how employers can begin a youth apprenticeship program that will serve their labor needs. It addresses the internal support that a business must generate and gives tips on choosing an…

Tips for the PR Chairman for Education Associations. PR Bookshelf No. 2.

ERIC Educational Resources Information Center

National Education Association, Washington, DC.

This booklet is intended to aid leaders of local education associations in developing a continuing public relations (PR) program aimed at establishing and maintaining a favorable public image for teachers. Although it offers useful guidelines for developing a PR program, the booklet does not contain lists of specific things to do. Instead, it…

Writing Interview Protocols and Conducting Interviews: Tips for Students New to the Field of Qualitative Research

ERIC Educational Resources Information Center

Jacob, Stacy A.; Furgerson, S. Paige

2012-01-01

Students new to doing qualitative research in the ethnographic and oral traditions, often have difficulty creating successful interview protocols. This article offers practical suggestions for students new to qualitative research for both writing interview protocol that elicit useful data and for conducting the interview. This piece was originally…

How To Make Presentations That Teach and Transform.

ERIC Educational Resources Information Center

Garmston, Robert J.; Wellman, Bruce M.

A practical guide to designing and delivering interesting and effective presentations for adult audiences, this book covers the five stages of a presentation and offers tips for executing each one. The book discusses stage fright and how to use it, and it explores the use of macro maps for staying focused during presentations. The book also…

For the Article Writer...How to Win Acceptances by Psychology Journals: 21 Tips for Better Writing.

ERIC Educational Resources Information Center

Sternberg, Robert J.

1993-01-01

Twenty-one suggestions are offered for successful writing for psychology journals. Suggestions include tell readers why they should be interested, consider alternative interpretations of the data, give concrete examples, write for a somewhat broader and technically less skilled audience than you expect to read the article, and don't take…

How to design an outstanding poster.

PubMed

Gemayel, Rita

2018-04-01

Poster sessions are an important forum for getting feedback on your results and engaging with the scientific community. In this instalment of the Words of Advice series, we provide you with a guide to designing an outstanding poster and offer tips on how to effectively communicate your results using your poster. © 2018 Federation of European Biochemical Societies.

The Big6 Collection: The Best of the Big6 Newsletter.

ERIC Educational Resources Information Center

Eisenberg, Michael B.; Berkowitz, Robert E.

The Big6 is a complete approach to implementing meaningful learning and teaching of information and technology skills, essential for 21st century living. Including in-depth articles, practical tips, and explanations, this book offers a varied range of material about students and teachers, the Big6, and curriculum. The book is divided into 10 main…

Parents' Handbook for Successful Schools = Manual de Padres para Escuelas de Exito.

ERIC Educational Resources Information Center

Patterson, Chris

This handbook is designed to help parents learn more about what is taking place in the schools their children attend and to help parents evaluate the effectiveness of the school's academic program. It offers tips for locating important information and identifies where assistance can be obtained. A checklist is provided to help parents identify the…

Reading Tips for Parents = Consejos practicos de lectura para los padres.

ERIC Educational Resources Information Center

Partnership for Family Involvement in Education (ED), Washington, DC.

Noting that all parents want the best school experience for their children, this booklet, presented in both English and Spanish, offers parents specific strategies to provide their children a good foundation for beginning reading. The guide first answers the question, "How Can I Help My Child Be Ready To Read and Ready To Learn?" with emergent…

Reading Tips for Parents = Consejos practicos de lectura para los padres.

ERIC Educational Resources Information Center

Partnership for Family Involvement in Education (ED), Washington, DC.

All parents want the best school experience for their children. This booklet, presented in both English and Spanish, offers parents specific strategies to provide their children a good foundation for beginning reading. The guide first answers the question, "How Can I Help My Child Be Ready To Read and Ready To Learn?" with emergent literacy…

Anger in the Library: Defusing Angry Patrons at the Reference Desk (and Elsewhere).

ERIC Educational Resources Information Center

Rubin, Rhea Joyce

1990-01-01

Offers suggestions for dealing with angry patrons in the library. Tips on diffusing the person's anger during the encounter are provided as well as short- and long-term suggestions for dealing with the library staffperson's feelings are included. Ways in which library administrators can assist their employees in dealing with angry patrons are also…

Science at the Seaside

ERIC Educational Resources Information Center

de Boo, Max; Shaw, Barbara

2006-01-01

The seashore is many things: (1) a place of wonder and delight--inspiring artists and composers; (2) a place of work--for transport and fishing; and (3) a place for play--for sandcastles, surfing and swimming, sailing. In this article, the authors offer some tips on exploring the flora and fauna of the seashore. (Contains 3 boxes and lists 4…

Words Du Jour: An Analysis of Traditional and Transitional Course Descriptors at Select J-Schools

ERIC Educational Resources Information Center

Spillman, Mary; Kuban, Adam J.; Smith, Suzy J.

2017-01-01

Journalism education may be at a tipping point. It is unclear, however, what new form curricula might take. Through an analysis of individual course titles and descriptions that appeared in the 2013-2014 undergraduate catalogs of 68 selected universities, this exploratory study finds that most departments/schools are not offering classes that…

Developing Verbal and Visual Literacy through Experiences in the Visual Arts: 25 Tips for Teachers

ERIC Educational Resources Information Center

Johnson, Margaret H.

2008-01-01

Including talk about art--conversing with children about artwork, their own and others'--as a component of visual art activities extends children's experiences in and understanding of visual messages. Johnson discusses practices that help children develop visual and verbal expression through active experiences with the visual arts. She offers 25…

Talking with Children about Natural Disasters

ERIC Educational Resources Information Center

Brodkin, Adele M.

2005-01-01

The effects of Hurricane Katrina, Hurricane Rita, and other natural disasters will be felt by young children in the affected areas for a long time to come. This article offers tips on how to talk with children about natural disasters in order to clear up any confusion they might have, how to answer their questions with sensitivity, and how to…

State Children's Cabinets and Councils--Elements of Success Issue 1: Structural Options

ERIC Educational Resources Information Center

Gaines, Elizabeth; Faigley, Ian; Pittman, Karen

2008-01-01

Elements of Success 1: Structural Options outlines the range of current children's cabinet and council structures in place and offers tips and warnings for getting the most effective structure in place. This issue brief builds heavily on interviews conducted by the Forum and on the detailed documentation work done by Susan Robison for the National…

Living in Spain. A Brief Introduction or Review of the Culture and Language of Spain for Visitors, Students, and Business Travelers. First Edition.

ERIC Educational Resources Information Center

Fantini, Alvino E.; Enriquez A., Cristina

The guide offers practical information on various aspects of daily living, including: money; banks; food; restaurants; hotels; tipping; postal and telecommunications services; transportation; shopping; health and medical care; safety and security; electricity; measurement and clothing size conversions; greetings and leave-takings; titles and forms…

Spread the Word: The Stop.Think.Connect.[TM] Community Outreach Guide

ERIC Educational Resources Information Center

US Department of Homeland Security, 2013

2013-01-01

The "Stop.Think.Connect. Community Outreach Toolkit" was adapted from the Federal Trade Commission's "OnGuardOnline.gov," a project that provides practical tips to help guard against Internet fraud and protect your privacy. The kit will help you offer your community information about protecting kids online. It includes "Stop.Think.Connect.," a…

Connect. Risk. Ask. Share. Lead!

ERIC Educational Resources Information Center

Lieberman, Daina S.

2014-01-01

Teachers are encouraged to "Step into Leadership" because they have a lot to offer, but also a lot to learn. However, many teachers need a push to get started on the path to teacher leadership beyond their classroom walls; therefore, this article provides teachers 10 tips on how to get started and where to look to expand their effect on…

If I Buy an Ad, Will You Print My Story? How to Work with Your Local Newspaper to Promote Adult Education Programs.

ERIC Educational Resources Information Center

Gores, Mary

1996-01-01

Offers tips for working with local newspapers to promote adult education programs. Suggestions include knowing who's who at the paper, knowing their deadlines, making sure your program is newsworthy, knowing the difference between the editorial and advertising departments, and knowing your market audience. (JOW)

Various aspects of sustainability analysis in Georgia

Treesearch

C. J. Cieszewski; M. Zasada; B. E. Borders; R. Lowe; M. L. Clutter; R. F. Daniels; R. Izlar

2002-01-01

In 2001 the Georgia Traditional Industries Program (TIP) sponsored a cooperative study at the D.B. Warnell School of Forest Resources, University of Georgia, to analyze the long-term sustainability of the fiber supply in Georgia. The subject of this study is relevant to a diverse array of disciplines, and it offers the opportunity to explore various aspects of...

Twelve tips for the production of digital chalk-talk videos.

PubMed

Rana, Jasmine; Besche, Henrike; Cockrill, Barbara

2017-06-01

Increasingly over the past decade, faculty in medical and graduate schools have received requests from digital millennial learners for concise faculty-made educational videos. At our institution, over the past couple of years alone, several hundred educational videos have been created by faculty who teach in a flipped-classroom setting of the pre-clinical medical school curriculum. Despite the appeal and potential learning benefits of digital chalk-talk videos first popularized by Khan Academy, we have observed that the conceptual and technological barriers for creating chalk-talk videos can be high for faculty. To this end, this tips article offers an easy-to-follow 12-step conceptual framework to guide at-home production of chalk-talk educational videos.

Structure, composition and properties of naturally occurring non-calcified crustacean cuticle.

PubMed

Cribb, B W; Rathmell, A; Charters, R; Rasch, R; Huang, H; Tibbetts, I R

2009-05-01

Crustaceans are known for their hard, calcified exoskeleton; however some regions appear different in colour and opacity. These include leg and cheliped tips in the grapsid crab, Metopograpsus frontalis. The chelipeds and leg tips contain only trace levels of calcium but a significant mass of the halogens, chlorine (Cl) and bromine (Br). In contrast, the carapace is heavily calcified and contains only a trace mass of Cl and no Br. In transverse section across the non-calcified tip regions of cheliped and leg the mass percent of halogens varies with position. As such, the exoskeleton of M. frontalis provides a useful model to examine a possible correlation of halogen concentration with the physical properties of hardness (H) and reduced elastic modulus (E(r)), within a chitin-based matrix. Previously published work suggests a correlation exists between Cl concentration and hardness in similar tissues that contain a metal (e.g. zinc). However, in M. frontalis H and E(r) did not vary significantly across cheliped or leg tip despite differences in halogen concentration. The non-calcified regions of M. frontalis are less hard and less stiff than the carapace but equivalent to values found for insect cuticle lacking metals. Cheliped tips showed a complex morphological layering that differed from leg tips.

Integrin-specific mechanoresponses to compression and extension probed by cylindrical flat-ended AFM tips in lung cells.

PubMed

Acerbi, Irene; Luque, Tomás; Giménez, Alícia; Puig, Marta; Reguart, Noemi; Farré, Ramon; Navajas, Daniel; Alcaraz, Jordi

2012-01-01

Cells from lung and other tissues are subjected to forces of opposing directions that are largely transmitted through integrin-mediated adhesions. How cells respond to force bidirectionality remains ill defined. To address this question, we nanofabricated flat-ended cylindrical Atomic Force Microscopy (AFM) tips with ~1 µm(2) cross-section area. Tips were uncoated or coated with either integrin-specific (RGD) or non-specific (RGE/BSA) molecules, brought into contact with lung epithelial cells or fibroblasts for 30 s to form focal adhesion precursors, and used to probe cell resistance to deformation in compression and extension. We found that cell resistance to compression was globally higher than to extension regardless of the tip coating. In contrast, both tip-cell adhesion strength and resistance to compression and extension were the highest when probed at integrin-specific adhesions. These integrin-specific mechanoresponses required an intact actin cytoskeleton, and were dependent on tyrosine phosphatases and Ca(2+) signaling. Cell asymmetric mechanoresponse to compression and extension remained after 5 minutes of tip-cell adhesion, revealing that asymmetric resistance to force directionality is an intrinsic property of lung cells, as in most soft tissues. Our findings provide new insights on how lung cells probe the mechanochemical properties of the microenvironment, an important process for migration, repair and tissue homeostasis.

75 FR 48880 - Approval and Promulgation of Gila River Indian Community's Tribal Implementation Plan

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-12

...The Environmental Protection Agency (EPA) proposes to approve the Gila River Indian Community's (GRIC or the Tribe) Tribal Implementation Plan (TIP) under the Clean Air Act (CAA) to regulate air pollution within the exterior boundaries of the Tribe's reservation. The proposed TIP is one of four CAA regulatory programs that comprise the Tribe's Air Quality Management Plan (AQMP). EPA approved the Tribe for treatment in the same manner as a State (Treatment as State or TAS) for purposes of administering the AQMP and other CAA authorities on October 21, 2009. In this action we propose to act only on those portions of the AQMP that constitute a TIP containing severable elements of an implementation plan under CAA section 110(a). The proposed TIP includes general and emergency authorities, ambient air quality standards, permitting requirements for minor sources of air pollution, enforcement authorities, procedures for administrative appeals and judicial review in Tribal court, requirements for area sources of fugitive dust and fugitive particulate matter, general prohibitory rules, and source category-specific emission limitations. The purpose of the proposed TIP is to implement, maintain, and enforce the National Ambient Air Quality Standards (NAAQS) in the GRIC reservation. The intended effect of today's proposed action is to make the GRIC TIP federally enforceable.

40 CFR 93.109 - Criteria and procedures for determining conformity of transportation plans, programs, and...

Code of Federal Regulations, 2011 CFR

2011-07-01

...) through (k) of this section explain when the budget, interim emissions, and hot-spot tests are required... § 93.115 Project from a conforming plan and TIP § 93.116 CO, PM10, and PM2.5 hot-spots. § 93.117 PM10... Currently conforming plan and TIP § 93.116 CO, PM10, and PM2.5 hot-spots. § 93.117 PM10 and PM2.5 control...

40 CFR 93.109 - Criteria and procedures for determining conformity of transportation plans, programs, and...

Code of Federal Regulations, 2010 CFR

2010-07-01

...) through (k) of this section explain when the budget, interim emissions, and hot-spot tests are required... § 93.115 Project from a conforming plan and TIP § 93.116 CO, PM10, and PM2.5 hot-spots. § 93.117 PM10... Currently conforming plan and TIP § 93.116 CO, PM10, and PM2.5 hot-spots. § 93.117 PM10 and PM2.5 control...

Transonic airfoil and axial flow rotary machine

DOEpatents

Nagai, Naonori; Iwatani, Junji

2015-09-01

Sectional profiles close to a tip 124 and a part between a midportion 125 and a hub 123 are shifted to the upstream of an operating fluid flow in a sweep direction. Accordingly, an S shape is formed in which the tip 124 and the part between the midportion 125 and the hub 123 protrude. As a result, it is possible reduce various losses due to shook, waves, thereby forming a transonic airfoil having an excellent aerodynamic characteristic.

Tip Clearance Control Using Plasma Actuators

DTIC Science & Technology

2007-03-01

Clearance Control Using Plasma Actuators 4 posed by Denton (1993). A number of investigators have used partial shrouds, or " winglet " designs to...main molded blade with a span of 3.42 in., a removable molded blade segment with a span of 0.1875 in., and removable blade tip winglets made of glass...segment and the main blade to vary the distance between the blade end and the front wall of the cascade section. The winglets were machined using a

Use of elevator instruments when luxating and extracting teeth in dentistry: clinical techniques

PubMed Central

2017-01-01

In dentistry, elevator instruments are used to luxate teeth, and this technique imparts forces to tooth particles that sever the periodontal ligament around tooth roots inside the socket and expand alveolar bone around tooth particles. These effects can result in extraction of the tooth particles or facilitate systematic forceps extraction of the tooth particles. This article presents basic oral surgery techniques for applying elevators to luxate teeth. Determination of the optimal luxation technique requires understanding of the functions of the straight elevator and the Cryer elevator, the concept of purchase points, how the design elements of elevator working ends and tips influence the functionality of an elevator, application of forces to tooth particles, sectioning teeth at furcations, and bone removal to facilitate luxation. The effectiveness of tooth particle luxation is influenced by elevator tip shape and size, the magnitude and the vectors of forces applied to the tooth particle by the tip, and sectioning and bone removal within the operating field. Controlled extraction procedures are facilitated by a dental operating microscope or the magnification of binocular surgical loupes telescopes, combined with co-axial illumination. PMID:28770164

Investigation of nucleation and growth processes of diamond films by atomic force microscopy

NASA Technical Reports Server (NTRS)

George, M. A.; Burger, A.; Collins, W. E.; Davidson, J. L.; Barnes, A. V.; Tolk, N. H.

1994-01-01

The nucleation and growth of plasma-enhanced chemical-vapor deposited polycrystalline diamond films were studied using atomic force microscopy (AFM). AFM images were obtained for (1) nucleated diamond films produced from depositions that were terminated during the initial stages of growth, (2) the silicon substrate-diamond film interface side of diamond films (1-4 micrometers thick) removed from the original surface of the substrate, and (3) the cross-sectional fracture surface of the film, including the Si/diamond interface. Pronounced tip effects were observed for early-stage diamond nucleation attributed to tip convolution in the AFM images. AFM images of the film's cross section and interface, however, were not highly affected by tip convolution, and the images indicate that the surface of the silicon substrate is initially covered by a small grained polycrystalline-like film and the formation of this precursor film is followed by nucleation of the diamond film on top of this layer. X-ray photoelectron spectroscopy spectra indicate that some silicon carbide is present in the precursor layer.

Effect of cavitation on flow structure of a tip vortex

NASA Astrophysics Data System (ADS)

Matthieu, Dreyer; Reclari, Martino; Farhat, Mohamed

2013-11-01

Tip vortices, which may develop in axial turbines and marine propellers, are often associated with the occurrence of cavitation because of the low pressure in their core. Although this issue has received a great deal of attention, it is still unclear how the phase transition affects the flow structure of such a vortex. In the present work, we investigate the change of the vortex structure due to cavitation incipience. The measurement of the velocity field is performed in the case of a tip vortex generated by an elliptical hydrofoil placed in the test section of EPFL high speed cavitation tunnel. To this end, a 3D stereo PIV is used with fluorescent seeding particles. A cost effective method is developed to produce in-house fluorescent seeding material, based on polyamide particles and Rhodamine-B dye. The amount of cavitation in the vortex core is controlled by the inlet pressure in the test section, starting with the non-cavitating case. We present an extensive analysis of the vorticity distribution, the vortex intensity and core size for various cavitation developments. This research is supported by CCEM and swisselectric research.

High-frequency, silicon-based ultrasonic nozzles using multiple Fourier horns.

PubMed

Tsai, Shirley C; Song, Yu L; Tseng, Terry K; Chou, Yuan F; Chen, Wei J; Tsai, Chen S

2004-03-01

This paper presents the design, simulation, and characterization of microfabricated 0.5 MHz, silicon-based, ultrasonic nozzles. Each nozzle is made of a piezoelectric drive section and a silicon resonator consisting of multiple Fourier horns, each with half wavelength design and twice amplitude magnification. Results of finite element three-dimensional (3-D) simulation using a commercial program predicted existence of one resonant frequency of pure longitudinal vibration. Both impedance analysis and measurement of longitudinal vibration confirmed the simulation results with one pure longitudinal vibration mode at the resonant frequency in excellent agreement with the design value. Furthermore, at the resonant frequency, the measured longitudinal vibration amplitude at the nozzle tip increases as the number of Fourier horns (n) increases in good agreement with the theoretical values of 2(n). Using this design, very high vibration amplitude gain at the nozzle tip can be achieved with no reduction in the tip cross-sectional area for contact of liquid to be atomized. Therefore, the required electric drive power should be drastically reduced, decreasing the likelihood of transducer failure in ultrasonic atomization.

Insomnia symptoms and their association with workplace productivity: cross-sectional and pre-post intervention analyses from a large multinational manufacturing company.

PubMed

Espie, Colin A; Pawlecki, Brent; Waterfield, Dickon; Fitton, Kit; Radocchia, Michael; Luik, Annemarie I

2018-06-01

Symptoms of insomnia are common and might impact work productivity. We investigated the relationship between insomnia symptoms and workplace productivity in a global manufacturing company. Within an uncontrolled, cross-sectional study, employees from a US-based company were invited to participate in an online evaluation comprising the Sleep Condition Indicator (SCI) measuring symptoms of insomnia (high score indicating better sleep), 2 items of the Work Productivity and Impairment Index (WPAI) measuring 'presenteeism' and 'absenteeism' (high score indicating loss of work productivity) and 1 item of the Perceived Stress Scale (PSS) from January 2015 onwards. Pre-post, within-subject data were collected to preliminary test effects of 'sleep tips' and digital cognitive behavioral therapy (dCBT). In 2798 employees [72% male; mean age 46.3(SD11.8) yrs] sleep was poorest in plant staff [SCI = 3.70(2.73)], then retail staff [4.34(3.02)], then office staff [4.95(2.83): overall F(2,2786) = 43.7, P < .0001]. More insomnia symptoms were associated with WPAI presenteeism (r = -.489, P < .0001; R 2 = 23.9%). Insomnia symptoms also were the strongest predictor of work-related productivity, with stress only contributing a further 9%. A regression model for 'absenteeism' was statistically significant but of limited predictive value (R 2 = 3.4%). In a sample of 214 employees with pre- and post-intervention data, the SCI of those exposed to sleep tips significantly increased from 5.36(3.28) to 6.01(3.22), [t(123) = -3.02, P = .003] and from 3.08(2.24) to 6.03(2.97) for those who accessed dCBT [t(89) = -8.40, P < .001). Symptoms of insomnia are associated with poor work productivity. Additionally, targeted insomnia interventions may offer potential to improve sleep and work productivity. Copyright © 2018 National Sleep Foundation. Published by Elsevier Inc. All rights reserved.

Curriculum Leadership: Development and Implementation

ERIC Educational Resources Information Center

Glatthorn, Allan A.; Boschee, Floyd; Whitehead, Bruce M.

2005-01-01

This book is a resource written for educational leaders who want to successfully restructure and enhance curriculum in schools today. It provides innovative and successful curriculum ideas, including reflective case studies, "Keys to Leadership" sections, curriculum tips, and "Challenge" sections with key issues and questions in every chapter.…

The Etiology of Cirrhosis is a Strong Determinant of Brain Reserve: A Multi-modal MR Imaging Study

PubMed Central

Ahluwalia, Vishwadeep; Wade, James B; Moeller, F Gerard; White, Melanie B; Unser, Ariel B; Gavis, Edith A; Sterling, Richard K; Stravitz, R Todd; Sanyal, Arun J; Siddiqui, Mohammad S; Puri, Puneet; Luketic, Velimir; Heuman, Douglas M; Fuchs, Michael; Matherly, Scott; Bajaj, Jasmohan S

2015-01-01

Background Poor brain reserve in alcoholic cirrhosis could worsen insight regarding disease severity and increase the patients’ vulnerability towards further deterioration. Aim To analyze brain reserve in abstinent alcoholic (Alc) compared to non-alcoholic (Nalc) cirrhosis patients in the context of hepatic encephalopathy (HE) and evaluate relative change in brain reserve between groups over time and before/after elective TIPS placement. Methods Cross-sectional study 46 Alc and 102 Nalc outpatients with or without HE. Cognitive tests followed by magnetic resonance (MR) imaging including 1-H MR Spectroscopy (MRS), Diffusion tensor (DTI) and T1-weighted imaging. Prospective study MRS on subset of 10 patients before/after TIPS placement. Another subset of 26 patients underwent MRS at least one year apart. Results Cross-sectional study Alc patients were worse on cognitive tests than Nalc. MR results suggest a greater effect of hyperammonemia, brain edema and significantly higher cortical damage in Alc as compared to Nalc patients. Effect of HE status on cognitive tests and brain reserve was more marked in Nalc than in Alc group. TIPS study Nalc patients showed a greater adverse relative change after TIPS compared to Alc group. 1-year follow-up Both groups remained stable between the two visits. However, Alc patients continued to show poor brain reserve than Nalc over time. Conclusions Patients with alcoholic cirrhosis, despite abstinence, have a poor brain reserve while, non-alcoholic cirrhosis patients have a greater potential for brain reserve deterioration after HE and TIPS. Information regarding the brain reserve in cirrhosis could assist medical teams to refine their communication and monitoring strategies for different etiologies. PMID:25939692

An improved integrally formed radio frequency quadrupole

DOEpatents

Abbott, S.R.

1987-10-05

An improved radio frequency quadrupole is provided having an elongate housing with an elongate central axis and top, bottom and two side walls symmetrically disposed about the axis, and vanes formed integrally with the walls, the vanes each having a cross-section at right angles to the central axis which tapers inwardly toward the axis to form electrode tips spaced from each other by predetermined distances. Each of the four walls, and the vanes integral therewith, is a separate structural element having a central lengthwise plane passing through the tip of the vane, the walls having flat mounting surfaces at right angles to and parallel to the control plane, respectively, which are butted together to position the walls and vane tips relative to each other. 4 figs.

Wind tunnel research comparing lateral control devices, particularly at high angles of attack XI : various floating tip ailerons on both rectangular and tapered wings

NASA Technical Reports Server (NTRS)

Weick, Fred E; Harris, Thomas A

1933-01-01

Discussed here are a series of systematic tests being conducted to compare different lateral control devices with particular reference to their effectiveness at high angles of attack. The present tests were made with six different forms of floating tip ailerons of symmetrical section. The tests showed the effect of the various ailerons on the general performance characteristics of the wing, and on the lateral controllability and stability characteristics. In addition, the hinge moments were measured for the most interesting cases. The results are compared with those for a rectangular wing with ordinary ailerons and also with those for a rectangular wing having full-chord floating tip ailerons. Practically all the floating tip ailerons gave satisfactory rolling moments at all angles of attack and at the same time gave no adverse yawing moments of appreciable magnitude. The general performance characteristics with the floating tip ailerons, however, were relatively poor, especially the rate of climb. None of the floating tip ailerons entirely eliminated the auto rotational moments at angles of attack above the stall, but all of them gave lower moments than a plain wing. Some of the floating ailerons fluttered if given sufficiently large deflection, but this could have been eliminated by moving the hinge axis of the ailerons forward. Considering all points including hinge moments, the floating tip ailerons on the wing with 5:1 taper are probably the best of those which were tested.

TIPsy tour guides: how microtubule plus-end tracking proteins (+TIPs) facilitate axon guidance

PubMed Central

Bearce, Elizabeth A.; Erdogan, Burcu; Lowery, Laura Anne

2015-01-01

The growth cone is a dynamic cytoskeletal vehicle, which drives the end of a developing axon. It serves to interpret and navigate through the complex landscape and guidance cues of the early nervous system. The growth cone’s distinctive cytoskeletal organization offers a fascinating platform to study how extracellular cues can be translated into mechanical outgrowth and turning behaviors. While many studies of cell motility highlight the importance of actin networks in signaling, adhesion, and propulsion, both seminal and emerging works in the field have highlighted a unique and necessary role for microtubules (MTs) in growth cone navigation. Here, we focus on the role of singular pioneer MTs, which extend into the growth cone periphery and are regulated by a diverse family of microtubule plus-end tracking proteins (+TIPs). These +TIPs accumulate at the dynamic ends of MTs, where they are well-positioned to encounter and respond to key signaling events downstream of guidance receptors, catalyzing immediate changes in microtubule stability and actin cross-talk, that facilitate both axonal outgrowth and turning events. PMID:26175669

Y stenting assisted coiling using a new low profile visible intraluminal support device for wide necked basilar tip aneurysms: a technical report.

PubMed

Conrad, Marcelo D; Brasiliense, Leonardo B C; Richie, Alexa N; Hanel, Ricardo A

2014-05-01

Many endovascular techniques have been described in recent years for the management of wide necked aneurysms. The Y stent assisted technique has been generally used for coil embolization of wide necked bifurcation aneurysms. This technique was first described for the treatment of basilar tip aneurysms in combination with several different devices, demonstrating encouraging results. We report the results of the first two cases of wide necked basilar tip aneurysms treated with Y stent assisted coil embolization using a new low profile visible intraluminal stent (LVIS Jr; MicroVention, Tustin, California, USA) delivered through a 0.017 inch microcatheter. We also reviewed the literature comparing other endovascular techniques (coiling alone, stent assisted coiling, and Y stent assisted coiling) for wide necked aneurysms. The LVIS Jr device offers a new option for the treatment of these challenging lesions, with clear advantages over currently available intracranial stents. Larger series and long term results are needed to confirm the applicability and durability of this technique/technology.

25 tips for working through language and cultural barriers in your medical practice.

PubMed

Hills, Laura Sachs

2009-01-01

The language and cultural barriers facing medical patients with limited English language proficiency pose tremendous challenges and risks. Moreover, medical practices today are more likely than ever to employ individuals whose first language is not English or who do not possess native-like knowledge of American culture. Knowing how to work through the language and cultural barriers you are likely to encounter in your medical practice has become increasingly more important. This article is written by a practice management consultant who has graduate-level linguistics training and second-language teaching credentials and experience. It offers 25 practical tips to help you communicate more effectively with individuals who are outside of your native culture and language. These include easy-to-implement tips about English language pronunciation, grammar, and word choice. This article also suggests what you can do personally to bridge the cultural divide with your patients and co-workers. Finally, this article includes a case study of one Virginia practice in which cultural differences interfered with the practice's smooth operation. It explains how the practice eventually worked through and overcame this cultural obstacle.

Temperature-tunable wettability on a bioinspired structured graphene surface for fog collection and unidirectional transport.

PubMed

Song, Yun-Yun; Liu, Yan; Jiang, Hao-Bo; Li, Shu-Yi; Kaya, Cigdem; Stegmaier, Thomas; Han, Zhi-Wu; Ren, Lu-Quan

2018-02-22

We designed a type of smart bioinspired wettable surface with tip-shaped patterns by combining polydimethylsiloxane (PDMS) and graphene (PDMS/G). The laser etched porous graphene surface can produce an obvious wettability change between 200 °C and 0 °C due to a change in aperture size and chemical components. We demonstrate that the cooperation of the geometrical structure and the controllable wettability play an important role in water gathering, and surfaces with tip-shaped wettability patterns can quickly drive tiny water droplets toward more wettable regions, so making a great contribution to the improvement of water collection efficiency. In addition, due to the effective cooperation between super hydrophobic and hydrophilic regions of the special tip-shaped pattern, unidirectional water transport on the 200 °C heated PDMS/G surface can be realized. This study offers a novel insight into the design of temperature-tunable materials with interphase wettability that may enhance fog collection efficiency in engineering liquid harvesting equipment, and realize unidirectional liquid transport, which could potentially be applied to the realms of microfluidics, medical devices and condenser design.

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-17

David Bell of Renew Merchandise was one of 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more. The event took place during the annual Earth Day celebration at the Kennedy Space Center Visitor Complex, guests have an opportunity to learn more about energy awareness, the environment and sustainability.

Inside France: Three Missing Pages from Your Students' Textbook.

ERIC Educational Resources Information Center

Conniffe, Patricia, Ed.

This mini-unit seeks to fill the gap in textbooks that exists when teaching about modern France. Many textbooks end their coverage of France with the chapter on World War II. This unit offers high school students a unique introduction to France in the mid-1990s. The mini-unit includes a two-sided poster, teaching tips, and student pages. Student…

Earth Day 2018 Activities

NASA Image and Video Library

2018-04-18

Employees get an up-close look at some Florida marine life during a visit to the University of Florida's Institute of Food and Agricultural Sciences booth at Kennedy Space Center’s annual Earth Day celebration. The two-day event featured approximately 50 exhibitors offering information on a variety of topics, including electric vehicles, sustainable lighting, renewable energy, Florida-friendly landscaping tips, Florida’s biking trails and more.

Home for the Holidays: Reducing the Stress for Your Gifted GLBTQ Kid

ERIC Educational Resources Information Center

Manzella, Teresa Ryan

2014-01-01

As families get together for various brands of holiday merry-making, parents of gay, lesbian, bisexual, transgender, and questioning (GLBTQ) youth can play a key role in making these gatherings more comfortable for their kids. This brief article offers tips on ways to handle various social and family situations over the holidays to make this time…

How to Help Children with Learning Differences Reach Their Full Potential

ERIC Educational Resources Information Center

Lavoie, Theresa

2008-01-01

This article is the third part of a 10-part series that explores Attention Deficit Hyperactivity Disorder (ADHD). It offers and discusses tips on how to help children with learning differences reach their full potential. These include: (1) start with good nutrition; (2) be sure your child is exercising; (3) make sure your child is getting enough…

Practical Tips and Tools--Using Stories from the Field for Professional Development: "How-To" Guidelines from Reading to Reflection and Practice Integration

ERIC Educational Resources Information Center

Talmi, Ayelet

2013-01-01

Case studies provide numerous opportunities for professional development and can be particularly helpful in transdiciplinary training. This article offers suggestions for how to use the "Zero to Three" Journal's "Stories From the Field" series of articles across a variety of settings and roles such as clinical practice, program…

Questions Parents Ask about Schools = Preguntas que hacen los padres sobre las escuelas. Revised.

ERIC Educational Resources Information Center

Department of Education, Washington, DC. Office of Intergovernmental and Interagency Affairs.

Noting that parents play an important role in the school success of their elementary- and middle-school-aged children, this booklet offers research-based tips to provide both practical guidance and information about a range of education-related topics. Presented in a question-answer format in both English and Spanish versions, the booklet provides…

Mobile Tools | Smokefree 60+

Cancer.gov

These mobile resources can help you quit when you're on the go. SmokefreeTXT SmokefreeTXT is a mobile text messaging service designed for adults across the United States who are trying to quit smoking. The program offers 24/7 encouragement, advice, and tips to help smokers quit smoking and stay quit. If you are interested in signing up, fill out this form.

Living in France. A Brief Introduction or Review of the Culture and Language of France for Visitors, Students and Business Travelers. Third revised Edition.

ERIC Educational Resources Information Center

Hawkinson, Anni; Moran, Patrick R.

The guide offers practical information on various aspects of daily living in France, including: money; food; restaurants; hotels; postal and telecommunications services; transportation; shopping; health and medical care; safety and security; tipping; electricity; measurement and clothing size conversions; greetings and leave-takings; names,…

Participating in the Direct Student Loan Program: Tips for Success.

ERIC Educational Resources Information Center

Macro International, Inc., Calverton, MD.

This guide provides information for schools considering whether to participate in the Federal Direct Student Loan Program, and it offers advice on how to plan for and operate the loan program at an individual school. The information in the guide is presented in a way that follows the steps that need to be taken in planning and implementing the…

Secrets of the Super Net Searchers: The Reflections, Revelations, and Hard-Won Wisdom of 35 of the World's Top Internet Researchers.

ERIC Educational Resources Information Center

Basch, Reva

This book presents the collected wisdom of 35 leading Internet hunters and gatherers. Through interviews, these experts offer insights, anecdotes, tips, techniques, and case histories which will raise the "searching IQ" of any serious Internet user. The Super Net Searchers explain how they find valuable information on the Internet,…

Hey, Small Spender: An Insider's Guide to Navigating ALA's Chicago Conference on the Cheap

ERIC Educational Resources Information Center

School Library Journal, 2009

2009-01-01

This article presents an insider's guide to navigating the American Library Association's (ALA) annual conference in Chicago on July 9-15. As for the extracurricular activities, Chicago has a lot to offer. This article provides tips from the arts and entertainment bible "Time Out Chicago" on where to go and what to do (on a limited…

From College Girl to Working Woman.

ERIC Educational Resources Information Center

Cowan, Susan

Written for the woman just graduated from college who wants a big-city job, the book provides coverage of the job scene from New York to San Francisco and offers methods and suggestions on how to create an exciting new career. Tips on where to look for jobs, the resume, and the job interview are some of the introductory topics, followed by a…

Faculty Transitions in Online Delivery: Make or Buy? Tips for Developing a "New to You" Online Course

ERIC Educational Resources Information Center

Delaney-Klinger, Kelly; Vanevenhoven, Jeff; Wagner, Richard; Chenoweth, John

2014-01-01

In the last few decades, teaching courses online has become a standard practice at many colleges and universities. Although technologies and pedagogies have changed rapidly during this time, developing an online course is still a labor and time-intensive undertaking. With changes in staffing and course offerings, faculty are often faced with…

Counseling Services Resource Guide: An Internet Guide for the North Carolina Community College Counselor To Assist Virtual Learning Students.

ERIC Educational Resources Information Center

North Carolina Community Coll. System, Raleigh.

This handbook is intended to assist North Carolina community colleges in enhancing their online counseling services. Based on reviews of 58 community colleges in North Carolina, along with several state, national, and university web sites, and the collective efforts of a statewide committee, this handbook offers: (1) General tips for improving…

It's the "Person First" Then the Disability. PHP-C31

ERIC Educational Resources Information Center

PACER Center, 2005

2005-01-01

This article briefly discusses the proper way to speak to or about someone who has a disability and why it is important to say it differently for a person with a disability. In speaking or writing, remember that children or adults with disabilities are like everyone else--except they happen to have a disability. This article offers a few tips for…

Managing Middle School Madness: Helping Parents and Teachers Understand the "Wonder Years"

ERIC Educational Resources Information Center

Gilderman, Glen

2006-01-01

For many parents and students, the transition from elementary school to middle school can be difficult. This book is a compilation of advice and information to help parents prepare for the behavioral, social, and academic adjustments that students may encounter. In this book, the author offers practical tips on topics such a setting up rewards for…

Prediction of the Aero-Acoustic Performance of Open Rotors

NASA Technical Reports Server (NTRS)

VanZante, Dale; Envia, Edmane

2014-01-01

The rising cost of jet fuel has renewed interest in contrarotating open rotor propulsion systems. Contemporary design methods offer the potential to maintain the inherently high aerodynamic efficiency of open rotors while greatly reducing their noise output, something that was not feasible in the 1980's designs. The primary source mechanisms of open rotor noise generation are thought to be the front rotor wake and tip vortex interacting with the aft rotor. In this paper, advanced measurement techniques and high-fidelity prediction tools are used to gain insight into the relative importance of the contributions to the open rotor noise signature of the front rotor wake and rotor tip vortex. The measurements include three-dimensional particle image velocimetry of the intra-rotor flowfield and the acoustic field of a model-scale open rotor. The predictions provide the unsteady flowfield and the associated acoustic field. The results suggest that while the front rotor tip vortex can have a significant influence on the blade passing tone noise produced by the aft rotor, the front rotor wake plays the decisive role in the generation of the interaction noise produced as a result of the unsteady aerodynamic interaction of the two rotors. At operating conditions typical of takeoff and landing operations, the interaction noise level is easily on par with that generated by the individual rotors, and in some cases is even higher. This suggests that a comprehensive approach to reducing open rotor noise should include techniques for mitigating the wake of the front rotor as well as eliminating the interaction of the front rotor tip vortex with the aft rotor blade tip.

Direct observation of the actin filament by tip-scan atomic force microscopy

PubMed Central

Narita, Akihiro; Usukura, Eiji; Yagi, Akira; Tateyama, Kiyohiko; Akizuki, Shogo; Kikumoto, Mahito; Matsumoto, Tomoharu; Maéda, Yuichiro; Ito, Shuichi; Usukura, Jiro

2016-01-01

Actin filaments, the actin–myosin complex and the actin–tropomyosin complex were observed by a tip-scan atomic force microscope (AFM), which was recently developed by Olympus as the AFM part of a correlative microscope. This newly developed AFM uses cantilevers of similar size as stage-scan AFMs to improve substantially the spatial and temporal resolution. Such an approach has previously never been possible by a tip-scan system, in which a cantilever moves in the x, y and z directions. We evaluated the performance of this developed tip-scan AFM by observing the molecular structure of actin filaments and the actin–tropomyosin complex. In the image of the actin filament, the molecular interval of the actin subunits (∼5.5 nm) was clearly observed as stripes. From the shape of the stripes, the polarity of the actin filament was directly determined and the results were consistent with the polarity determined by myosin binding. In the image of the actin–tropomyosin complex, each tropomyosin molecule (∼2 nm in diameter) on the actin filament was directly observed without averaging images of different molecules. Each tropomyosin molecule on the actin filament has never been directly observed by AFM or electron microscopy. Thus, our developed tip-scan AFM offers significant potential in observing purified proteins and cellular structures at nanometer resolution. Current results represent an important step in the development of a new correlative microscope to observe nm-order structures at an acceptable frame rate (∼10 s/frame) by AFM at the position indicated by the fluorescent dye observed under a light microscope. PMID:27242058

Preliminary Design Study of a Tail Rotor Blade Jettison Concept

DTIC Science & Technology

1978-07-01

mannar licai^infi tha hohtar or any olhar parion or torporatlon, or convaylni any ti«hti or l>armiHlon, to manuUiMura ut«, or »rti m\\ fvii «i\\(<<>l...Twist (from center of rotation to blade tip) deg - 20.0 Outboard Blade Airfoil Section m SC-1095 Tip Loss Factor - 0.97 First Flatwise Frequency...basic elements. The prototype system designed for fabrication and evaluation testing differed from a fully productionized configuration In several