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1

RAPID COMMUNICATION Yolk Testosterone Varies With Sex in  

E-print Network

RAPID COMMUNICATION Yolk Testosterone Varies With Sex in Eggs of the Lizard, Anolis carolinensis), a lizard with genotypic sex determination, yolk testosterone (T) concentration is greater in male previous studies. If yolk T levels are also sex-specific before eggs are laid, a period during which

Wade, Juli

2

Rapid electrochemical detection on a mobile phone.  

PubMed

We present a compact mobile phone platform for rapid, quantitative biomolecular detection. This system consists of an embedded circuit for signal processing and data analysis, and disposable microfluidic chips for fluidic handling and biosensing. Capillary flow is employed for sample loading, processing, and pumping to enhance operational portability and simplicity. Graphical step-by-step instructions displayed on the phone assists the operator through the detection process. After the completion of each measurement, the results are displayed on the screen for immediate assessment and the data is automatically saved to the phone's memory for future analysis and transmission. Validation of this device was carried out by detecting Plasmodium falciparum histidine-rich protein 2 (PfHRP2), an important biomarker for malaria, with a lower limit of detection of 16 ng mL(-1) in human serum. The simple detection process can be carried out with two loading steps and takes 15 min to complete each measurement. Due to its compact size and high performance, this device offers immense potential as a widely accessible, point-of-care diagnostic platform, especially in remote and rural areas. In addition to its impact on global healthcare, this technology is relevant to other important applications including food safety, environmental monitoring and biosecurity. PMID:23689554

Lillehoj, Peter B; Huang, Ming-Chun; Truong, Newton; Ho, Chih-Ming

2013-08-01

3

RAPID ADAPTATION FOR MOBILE SPEECH APPLICATIONS Michiel Bacchiani  

E-print Network

RAPID ADAPTATION FOR MOBILE SPEECH APPLICATIONS Michiel Bacchiani Google Inc., New York, NY 10011 in mobile speech applications. We show that on this task, the proposed approach has two merits over a linear of the large statistics that this approach gives rise to when applied on a database of thousands of hours

Cortes, Corinna

4

Inductive instability in electrodynamic systems with rapidly varying parameters  

E-print Network

layers grows. Similar effects occur in electric circuits with different conductors connected in parallel comprising layers with different magnitudes of elec- tric conductivity or electric circuits with parallel- tion of the electric conductivity or by rapid variations of inductance. In R­C circuits instability

Elperin, Tov

5

Rapid behavioral response to corticosterone varies with photoperiod and dose.  

PubMed

The magnitude of the adrenocortical response to stress can be modulated by a variety of environmental and physiological factors, such as daylength and body condition. To determine the consequences of this modulation for the organism, one also needs to investigate behavioral sensitivity to glucocorticoids. We examined the behavioral response of Gambel's white-crowned sparrows (Zonotrichia leucophrys gambelii) to elevated glucocorticoids. Using a behavioral assay in which a rapid and transient dose of corticosterone (CORT: the avian glucocorticoid) rapidly increases perch hopping, we first investigated the photoperiodic regulation of this behavioral response. Intermediate levels of CORT ( approximately 24 ng/ml), which increased activity in sparrows exposed to a long-day (breeding) photoperiod, had no behavioral effect in sparrows exposed to a short-day (winter) photoperiod. Hence, the neural mechanisms which regulate the behavioral response to CORT appear to be less sensitive under a winter photoperiod. Using the same behavioral assay, we also measured a dose-response curve for CORT's effects on activity in sparrows exposed to the long-day photoperiod. Intermediate levels (24 and 40 ng/ml) increased activity to threefold background levels, whereas high physiological levels (65 and 97 ng/ml) had no effect. Given that the behavioral response does not increase linearly with CORT, we can no longer assume that modulation of the adrenocortical response to stress will result in linear changes in behavior. PMID:10712855

Breuner, C W; Wingfield, J C

2000-02-01

6

MONTE-CARLO BASED ESTIMATION METHODS FOR RAPIDLY-VARYING SEA CLUTTER  

E-print Network

MONTE-CARLO BASED ESTIMATION METHODS FOR RAPIDLY-VARYING SEA CLUTTER Ying Li , William Moran Monte-Carlo based methods for characteriz- ing the scattering function of rapidly-varying sea clutter. The first method uses multiple particle filtering to estimate the clutter space-time covariance marix

Nehorai, Arye

7

Rapid world modelling from a mobile platform  

Microsoft Academic Search

The ability to successfully use and interact with a computerized world model is dependent on the ability to create an accurate world model. The goal of this project was to develop a prototype system to remotely deploy sensors into a workspace, collect surface information, and rapidly build an accurate world model of that workspace. A key consideration was that the

Robert E. Barry; Judson P. Jones; Charles Q. Little; Christopher W. Wilson

1997-01-01

8

Transient effective hydraulic conductivities under slowly and rapidly varying mean gradients in bounded three-  

E-print Network

Transient effective hydraulic conductivities under slowly and rapidly varying mean gradients it Darcian in real or transformed domains. Each such situation gives rise to an effective hydraulic-time. In this paper we develop first-order analytical expressions for effective hydraulic conductivity under three

Tartakovsky, Daniel M.

9

Rapid Naming Speed and Reading across Languages that Vary in Orthographic Consistency  

ERIC Educational Resources Information Center

The objective of this study was to examine how rapid naming speed is related to reading ability across languages that vary in orthographic consistency. Forty English-speaking Canadian children, 40 Greek-speaking Cypriot children, and 40 Chinese-speaking Taiwanese children were administered RAN, reading accuracy, and reading fluency tasks in grade…

Georgiou, George K.; Parrila, Rauno; Liao, Chen-Huei

2008-01-01

10

Time-varying Feedback Stabilization of Car-like Wheeled Mobile Robots  

Microsoft Academic Search

Many nonholonomic mechanical systems, such as common wheeled mobile robots, are controllable but cannot be stabilized to given positions and orientations bv using smooth pure-state feedback control. However, as shown in Samson (1990), such systems may still be stabilized by using smooth time-varying feedbacks,—i.e., feedbacks that explicitly depend on the time variable. This possibility is here applied to the stabilization

Claude Samson

1993-01-01

11

Force-dependent mobility and entropic rectification in tubes of periodically varying geometry.  

PubMed

We investigate transport of point Brownian particles in a tube formed by identical periodic compartments of varying diameter, focusing on the effects due to the compartment asymmetry. The paper contains two parts. First, we study the force-dependent mobility of the particle. The mobility is a symmetric non-monotonic function of the driving force, F, when the compartment is symmetric. Compartment asymmetry gives rise to an asymmetric force-dependent mobility, which remains non-monotonic when the compartment asymmetry is not too high. The F-dependence of the mobility becomes monotonic in tubes formed by highly asymmetric compartments. The transition of the F-dependence of the mobility from non-monotonic to monotonic behavior results in important consequences for the particle motion under the action of a time-periodic force with zero mean, which are discussed in the second part of the paper: In a tube formed by moderately asymmetric compartments, the particle under the action of such a force moves with an effective drift velocity that vanishes at small and large values of the force amplitude having a maximum in between. In a tube formed by highly asymmetric compartments, the effective drift velocity monotonically increases with the amplitude of the driving force and becomes unboundedly large as the amplitude tends to infinity. PMID:22697533

Dagdug, Leonardo; Berezhkovskii, Alexander M; Makhnovskii, Yurii A; Zitserman, Vladimir Yu; Bezrukov, Sergey M

2012-06-01

12

Formative evaluation of a mobile liquid portion size estimation interface for people with varying literacy skills  

PubMed Central

Chronically ill people, especially those with low literacy skills, often have difficulty estimating portion sizes of liquids to help them stay within their recommended fluid limits. There is a plethora of mobile applications that can help people monitor their nutritional intake but unfortunately these applications require the user to have high literacy and numeracy skills for portion size recording. In this paper, we present two studies in which the low- and the high-fidelity versions of a portion size estimation interface, designed using the cognitive strategies adults employ for portion size estimation during diet recall studies, was evaluated by a chronically ill population with varying literacy skills. The low fidelity interface was evaluated by ten patients who were all able to accurately estimate portion sizes of various liquids with the interface. Eighteen participants did an in situ evaluation of the high-fidelity version incorporated in a diet and fluid monitoring mobile application for 6 weeks. Although the accuracy of the estimation cannot be confirmed in the second study but the participants who actively interacted with the interface showed better health outcomes by the end of the study. Based on these findings, we provide recommendations for designing the next iteration of an accurate and low literacy-accessible liquid portion size estimation mobile interface. PMID:24443659

Connelly, Kay; Siek, Katie A.; Welch, Janet L.

2012-01-01

13

Formative evaluation of a mobile liquid portion size estimation interface for people with varying literacy skills.  

PubMed

Chronically ill people, especially those with low literacy skills, often have difficulty estimating portion sizes of liquids to help them stay within their recommended fluid limits. There is a plethora of mobile applications that can help people monitor their nutritional intake but unfortunately these applications require the user to have high literacy and numeracy skills for portion size recording. In this paper, we present two studies in which the low- and the high-fidelity versions of a portion size estimation interface, designed using the cognitive strategies adults employ for portion size estimation during diet recall studies, was evaluated by a chronically ill population with varying literacy skills. The low fidelity interface was evaluated by ten patients who were all able to accurately estimate portion sizes of various liquids with the interface. Eighteen participants did an in situ evaluation of the high-fidelity version incorporated in a diet and fluid monitoring mobile application for 6 weeks. Although the accuracy of the estimation cannot be confirmed in the second study but the participants who actively interacted with the interface showed better health outcomes by the end of the study. Based on these findings, we provide recommendations for designing the next iteration of an accurate and low literacy-accessible liquid portion size estimation mobile interface. PMID:24443659

Chaudry, Beenish Moalla; Connelly, Kay; Siek, Katie A; Welch, Janet L

2013-12-01

14

Nonlinear analysis of phased-locked loops with rapidly varying phase  

NASA Technical Reports Server (NTRS)

The performance of command and telemetry systems, useful in deep-space communications, is frequently affected by the radio-frequency phase error which is introduced at the point of reception by means of the carrier tracking loop. In low data rate communications, this phase error may vary rapidly over the duration of the signaling interval. In this paper such phase variation is characterized by a sinusoidal input phase, K sin (omega sub o t+, pi/6), which models a typical phase variation in communication over turbulent media. Conditions for synchronization stability and the acquisition behavior are examined by detailed computer study of the phase-plane trajectories for the second and third-order loops with perfect integrator. It is demonstrated that for the phase variation considered the third-order loop has no real advantage over the second-order loop. Finally, it is shown that nonzero initial conditions may result in large steady-state phase error.

Chen, C.; Fan, M.

1973-01-01

15

Is bigger really better? Comparison of rapid decompression experiments using varying sample sizes  

NASA Astrophysics Data System (ADS)

Rapid decompression of pressurized volcanic systems is one of the key factors causing explosive eruptions. During eruption, the mixture of melt, crystals and bubbles comprising the magma in the conduit is exposed to high strain rates. If the strain rate approaches the structural relaxation time of the melt, brittle fragmentation will occur. The rate of decompression controls the strain rate and thereby determines whether an explosive event is triggered. Several studies have investigated rapid decompression of natural volcanic rocks using sample sizes ranging from 17 mm to 26 mm diameter. This increase in sample size enables the use of samples containing elements such as vesicles and phenocrysts of order of a few mm in size. For samples with larger phenocrysts, the experimental response of samples of this size range to rapid decompression is significantly compromised by the behaviour of these large crystals. However, large phenocrysts and particularly large vesicles are quite common in volcanic rocks. Thus, to cope with these samples experimentally, we developed an experimental set-up that enables the use of sample diameters up to 60 mm. Comparison to the results from smaller samples sizes allows us to evaluate the impact of boundary conditions and sample size itself on fragmentation behaviour (threshold, speed and efficiency). We performed experiments on samples from Lipari (Italy), Mt.Merapi (Indonesia) and Mt.Yasur (Vanuatu) that cover a large range in connected porosity, namely 18 - 78 %. All rapid decompression experiments were conducted at room temperature in a pressure range from 2 - 10 MPa. In a first series of experiments we analysed the fragmentation threshold, in a second series we determined fragmentation speed and grain-size distribution for each experiment. Additionally, we were able to estimate the velocity of the particles ejected after fragmentation using a high-speed camera. The results are discussed in the light of data from recent studies using smaller sample diameters. Further we evaluate the influence of varying decompression rates on the experiments. Finally we apply an energy budget model providing a link between the fragmentation process and the particle velocity.

Kremers, S. B.; Barsu, S.; Scheu, B.; Dingwell, D. B.

2011-12-01

16

RAMON: Rapid-Mobility Network Emulator Edwin Hernandez and Abdelsalam (Sumi) Helal  

E-print Network

RAMON: Rapid-Mobility Network Emulator Edwin Hernandez and Abdelsalam (Sumi) Helal Computer protocols. Emulation, which presents a lower cost, more accurate, yet more complex engineering alternative to simulation, has not been widely used in mobile computing studies. RAMON is a software/hardware emulator

Helal, Abdelsalam

17

Rapid spherical 3-D field measurement system for mobile terminal antennas  

Microsoft Academic Search

A novel rapid spherical 3-D field measurement system for mobile terminal antennas, that is capable of determining the radiation pattern of a mobile terminal antenna without rotating the antenna, is introduced. The system is based on measuring the complex radiated field at 32 locations on a spherical surface. At each location the field in two orthogonal tangential polarizations is measured.

T. A. Laitinen; J. Ollikainen; C. Icheln; P. Vainikainen

2003-01-01

18

Rapid scene reconstruction on mobile phones from panoramic images  

Microsoft Academic Search

Rapid D reconstruction of environments has become an active research topic due to the importance of 3D models in a huge number of applications, be it in Augmented Reality (AR), architecture or other commercial areas. In this paper we present a novel system that allows for the generation of a coarse D model of the environment within several seconds on

Qi Pan; Clemens Arth; Gerhard Reitmayr; Edward Rosten; Tom Drummond

2011-01-01

19

Formylpeptide Receptors Mediate Rapid Neutrophil Mobilization to Accelerate Wound Healing  

PubMed Central

Wound healing is a multi-phased pathophysiological process requiring chemoattractant receptor-dependent accumulation of myeloid cells in the lesion. Two G protein-coupled formylpeptide receptors Fpr1 and Fpr2 mediate rapid neutrophil infiltration in the liver of Listeria-infected mice by sensing pathogen-derived chemotactic ligands. These receptors also recognize host-derived chemotactic peptides in inflammation and injury. Here we report the capacity of Fprs to promote the healing of sterile skin wound in mice by initiating neutrophil infiltration. We found that in normal miceneutrophils rapidly infiltrated the dermis in the wound before the production of neutrophil-specific chemokines by the injured tissue. In contrast, rapid neutrophil infiltration was markedly reduced with delayed wound closure in mice deficient in both Fprs. In addition, we detected Fpr ligand activity that chemoattracted neutrophils into the wound tissue. Our study thus demonstrates that Fprs are critical for normal healing of the sterile skin wound by mediating the first wave of neutrophil infiltration. PMID:24603667

Liu, Mingyong; Chen, Keqiang; Yoshimura, Teizo; Liu, Ying; Gong, Wanghua; Le, Yingying; Gao, Ji-Liang; Zhao, Jianhua; Wang, Ji Ming; Wang, Aimin

2014-01-01

20

Formylpeptide receptors mediate rapid neutrophil mobilization to accelerate wound healing.  

PubMed

Wound healing is a multi-phased pathophysiological process requiring chemoattractant receptor-dependent accumulation of myeloid cells in the lesion. Two G protein-coupled formylpeptide receptors Fpr1 and Fpr2 mediate rapid neutrophil infiltration in the liver of Listeria-infected mice by sensing pathogen-derived chemotactic ligands. These receptors also recognize host-derived chemotactic peptides in inflammation and injury. Here we report the capacity of Fprs to promote the healing of sterile skin wound in mice by initiating neutrophil infiltration. We found that in normal miceneutrophils rapidly infiltrated the dermis in the wound before the production of neutrophil-specific chemokines by the injured tissue. In contrast, rapid neutrophil infiltration was markedly reduced with delayed wound closure in mice deficient in both Fprs. In addition, we detected Fpr ligand activity that chemoattracted neutrophils into the wound tissue. Our study thus demonstrates that Fprs are critical for normal healing of the sterile skin wound by mediating the first wave of neutrophil infiltration. PMID:24603667

Liu, Mingyong; Chen, Keqiang; Yoshimura, Teizo; Liu, Ying; Gong, Wanghua; Le, Yingying; Gao, Ji-Liang; Zhao, Jianhua; Wang, Ji Ming; Wang, Aimin

2014-01-01

21

The effect of rapidly varying contact stress fields on fretting fatigue  

Microsoft Academic Search

An experimental and analytical study of the effect of varying contact stress fields on the initiation life of fretted specimens is conducted for two high strength alloys commonly used in the aerospace industry, namely Al4%Cu and Ti-6Al-4V. The experiments reveal there is a contact size effect in fretting fatigue life. Two critical plane models are used to predict the observed

J. A Araújo; D Nowell

2002-01-01

22

Rapid profiling and identification of anthocyanins in fruits with Hadamard transform ion mobility mass spectrometry.  

PubMed

The use of Hadamard transform ion mobility mass spectrometry (HT-IMMS) in the profiling of anthocyanins from different fruits is presented. Samples extracted with acidic methanol and purified with solid phase extraction were analyzed with direct IMMS infusion. The separation of various anthocyanins was achieved within 30s with resolving powers up to 110. The ion mobility drift times correlated with their mass-to-charge ratios with a correlation coefficient of 0.979 to produce a trend line that was characteristic for anthocyanins. Isomers with the same anthocyanidin but different hexoses were differentiated by ion mobility spectrometry. Furthermore, mobility separated ions underwent collision induced dissociation at the IMMS interface to provide MS/MS spectra. These fragmentation spectra aided in the identification of anthocyanidins via the loss of the saccharide groups. IMMS appears to be a rapid and efficient approach for profiling and identifying anthocyanins. PMID:25660880

Liu, Wenjie; Zhang, Xing; Siems, William F; Hill, Herbert H; Yin, Dulin

2015-06-15

23

Supporting Rapid Mobility via Locality in an Overlay Network Ben Y. Zhao, Anthony D. Joseph and John Kubiatowicz  

E-print Network

routed to their new location. While the total number of cell crossings per minute is relatively smallSupporting Rapid Mobility via Locality in an Overlay Network Ben Y. Zhao, Anthony D. Joseph Berkeley, California 94720 #12; Supporting Rapid Mobility via Locality in an Overlay Network Ben Y. Zhao

Zhao, Ben Y.

24

Supporting Rapid Mobility via Locality in an Overlay Network Ben Y. Zhao, Anthony D. Joseph and John Kubiatowicz  

E-print Network

routed to their new location. While the total number of cell crossings per minute is relatively smallSupporting Rapid Mobility via Locality in an Overlay Network Ben Y. Zhao, Anthony D. Joseph Berkeley, California 94720 #12;Supporting Rapid Mobility via Locality in an Overlay Network Ben Y. Zhao

Kubiatowicz, John D.

25

Rapidly varying A-type stars in the SuperWASP archive  

NASA Astrophysics Data System (ADS)

The searches for transiting exoplanets have produced a vast amount of time-resolved photometric data of many millions of stars. One of the leading ground-based surveys is the SuperWASP project. We present the initial results of a survey of over 1.5 million A-type stars in the search for high frequency pulsations using SuperWASP photometry. We are able to detect pulsations down to the 0.5 mmag level in the broad-band photometry. This has enabled the discovery of several rapidly oscillating Ap stars and over 200 ? Scuti stars with frequencies above 50 d-1, and at least one pulsating sdB star. Such a large number of results allows us to statistically study the frequency overlap between roAp and ? Scuti stars and probe to higher frequency regimes with existing data.

Holdsworth, Daniel L.; Smalley, Barry

2014-02-01

26

Rapid-screening detection of acetildenafils, sildenafils and avanafil by ion mobility spectrometry.  

PubMed

Ion mobility spectrometry was used as a rapid screening tool for the detection of acetildenafils, sildenafils and avanafil within adulterated herbal supplement matrices. Acetildenafils show a tendency for partial fragmentation during the desorption/ionization process affording two peaks in the ion mobility spectrum in addition to the intact compound. The fragmentation appears to occur ? to the carbonyl group along the CN bond attaching the piperazine moiety, producing a common fragment (K?=1.0280 cm˛V?ąs?ą) along with the respective piperazine fragment. The sildenafils and avanafil afford one molecular ion peak per compound. PMID:23262416

Mans, Daniel J; Callahan, Rebecca J; Dunn, Jamie D; Gryniewicz-Ruzicka, Connie M

2013-03-01

27

Lax-Wendroff and McCormack Schemes for Numerical Simulation of Unsteady Gradually and Rapidly Varied Open Channel Flow  

NASA Astrophysics Data System (ADS)

Two explicit schemes of the finite difference method are presented and analyzed in the paper. The applicability of the Lax-Wendroff and McCormack schemes for modeling unsteady rapidly and gradually varied open channel flow is investigated. For simulation of the transcritical flow the original and improved McCormack scheme is used. The schemes are used for numerical solution of one dimensional Saint-Venant equations describing free surface water flow. Two numerical simulations of flow with different hydraulic characteristics were performed - the first one for the extreme flow of the dam-break type and the second one for the simplified flood wave propagation problem. The computational results are compared to each other and to arbitrary solutions.

Machalinska-Murawska, Justyna; Szyd?owski, Micha?

2014-10-01

28

A pilot biomedical engineering course in rapid prototyping for mobile health.  

PubMed

Rapid prototyping of medically assistive mobile devices promises to fuel innovation and provides opportunity for hands-on engineering training in biomedical engineering curricula. This paper presents the design and outcomes of a course offered during a 16-week semester in Fall 2011 with 11 students enrolled. The syllabus covered a mobile health design process from end-to-end, including storyboarding, non-functional prototypes, integrated circuit programming, 3D modeling, 3D printing, cloud computing database programming, and developing patient engagement through animated videos describing the benefits of a new device. Most technologies presented in this class are open source and thus provide unlimited "hackability". They are also cost-effective and easily transferrable to other departments. PMID:24110238

Stokes, Todd H; Venugopalan, Janani; Hubbard, Elena N; Wang, May D

2013-01-01

29

Heterogeneity of high-mobility-group protein 2. Enrichment of a rapidly migrating form in testis.  

PubMed Central

A determination of the absolute amounts of high-mobility-group proteins 1 and 2 (HMG1 and HMG2) in rat tissues demonstrated that amounts of HMG2 were low in non-proliferating tissues, somewhat higher in proliferating and lymphoid tissues, but were extremely elevated in the testis. This increase was due to a germ-cell-specific form of HMG2 with increased mobility relative to somatic HMG2 on acid/urea/polyacrylamide-gel electrophoresis. To determine if the findings in the rat were a general feature of spermatogenesis, testis (germinal), spleen (lymphoid), and liver (non-proliferating) tissues from various vertebrate species were examined for their relative amounts of HMG1 and HMG2, and for HMG2 heterogeneity. Bull, chimpanzee, cynomologus monkey, dog, gopher, guinea pig, hamster, mouse, opossum, rabbit, rat, rhesus monkey, squirrel and toad (Xenopus) tissues were analysed. Nearly all species showed relatively high contents of HMG2 in testis tissue, whereas HMG1 contents were similar in all species and tissues. Ten of thirteen species showed a rapidly migrating HMG2 subtype in testis tissue, separable by acid/urea/polyacrylamide-gel electrophoresis. Xenopus, which lacks HMG2 in somatic tissues, showed an HMG2-like protein in testis tissue. Although the rapidly migrating HMG2 subtype in species other than rat was not testis-specific, it was always enriched in the testis. This study indicates that increased amounts of HMG2 and the enrichment of a rapidly migrating HMG2 subtype are general features of spermatogenic cells. Images Fig. 1. Fig. 2. Fig. 3. PMID:4038257

Bucci, L R; Brock, W A; Meistrich, M L

1985-01-01

30

Adaptive control of the unique mobility EV drive system to account for time-varying battery parameters  

SciTech Connect

Unique Mobility developed an electric vehicle drive system which is being used in the BMW E1. This system is comprised of a permanent magnet brushless DC motor, amplifier, and microprocessor controller. The system is capable of high torque (150 Nm) at low speeds (< 2,000 rpm) and constant power (32 kW) at higher speeds (to 8,000 rpm). The design of the system utilizes a 6 step drive in combination with microprocessor control. The topology of the drive was designed to maximize overall system efficiency. The control system was designed to operate smoothly while transitioning between different regions of operation. The controller must also regulate the torque to stay within all of the safety limits, two of which are under voltage and over voltage. The under voltage limit is used to prevent fully discharging the batteries to prolong their life, and the over voltage limit is necessary to protect the power devices in the amplifier and/or prevent outgassing of the battery. The maximum voltage from the motor in regeneration is a function of the regenerated current, the internal battery impedance in regeneration, and the open circuit bus voltage.the open circuit bus voltage and the internal battery impedance in regeneration varies with each different battery technology, and the batteries` short and long term charge/discharge history. The described drive system adapts to any battery technology by limiting the user to only the maximum instantaneous power that the battery can provide (in motoring) or accept (in regeneration).

Kopf, C. [Unique Mobility, Golden, CO (United States)

1995-07-01

31

Acute Sterol O-Acyltransferase 2 (SOAT2) Knockdown Rapidly Mobilizes Hepatic Cholesterol for Fecal Excretion  

PubMed Central

The primary risk factor for atherosclerotic cardiovascular disease is LDL cholesterol, which can be reduced by increasing cholesterol excretion from the body. Fecal cholesterol excretion can be driven by a hepatobiliary as well as a non-biliary pathway known as transintestinal cholesterol efflux (TICE). We previously showed that chronic knockdown of the hepatic cholesterol esterifying enzyme sterol O-acyltransferase 2 (SOAT2) increased fecal cholesterol loss via TICE. To elucidate the initial events that stimulate TICE, C57Bl/6 mice were fed a high cholesterol diet to induce hepatic cholesterol accumulation and were then treated for 1 or 2 weeks with an antisense oligonucleotide targeting SOAT2. Within 2 weeks of hepatic SOAT2 knockdown (SOAT2HKD), the concentration of cholesteryl ester in the liver was reduced by 70% without a reciprocal increase in hepatic free cholesterol. The rapid mobilization of hepatic cholesterol stores resulted in a ?2-fold increase in fecal neutral sterol loss but no change in biliary cholesterol concentration. Acute SOAT2HKD increased plasma cholesterol carried primarily in lipoproteins enriched in apoB and apoE. Collectively, our data suggest that acutely reducing SOAT2 causes hepatic cholesterol to be swiftly mobilized and packaged onto nascent lipoproteins that feed cholesterol into the TICE pathway for fecal excretion. PMID:24901470

Marshall, Stephanie M.; Gromovsky, Anthony D.; Kelley, Kathryn L.; Davis, Matthew A.; Wilson, Martha D.; Lee, Richard G.; Crooke, Rosanne M.; Graham, Mark J.; Rudel, Lawrence L.

2014-01-01

32

Mycobacteria mobility shift assay: a method for the rapid identification of Mycobacterium tuberculosis and nontuberculous mycobacteria  

PubMed Central

The identification of mycobacteria is essential because tuberculosis (TB) and mycobacteriosis are clinically indistinguishable and require different therapeutic regimens. The traditional phenotypic method is time consuming and may last up to 60 days. Indeed, rapid, affordable, specific and easy-to-perform identification methods are needed. We have previously described a polymerase chain reaction-based method called a mycobacteria mobility shift assay (MMSA) that was designed for Mycobacterium tuberculosis complex (MTC) and nontuberculous mycobacteria (NTM) species identification. The aim of this study was to assess the MMSA for the identification of MTC and NTM clinical isolates and to compare its performance with that of the PRA-hsp65 method. A total of 204 clinical isolates (102 NTM and 102 MTC) were identified by the MMSA and PRA-hsp65. For isolates for which these methods gave discordant results, definitive species identification was obtained by sequencing fragments of the 16S rRNA and hsp65 genes. Both methods correctly identified all MTC isolates. Among the NTM isolates, the MMSA alone assigned 94 (92.2%) to a complex or species, whereas the PRA-hsp65 method assigned 100% to a species. A 91.5% agreement was observed for the 94 NTM isolates identified by both methods. The MMSA provided correct identification for 96.8% of the NTM isolates compared with 94.7% for PRA-hsp65. The MMSA is a suitable auxiliary method for routine use for the rapid identification of mycobacteria. PMID:24821059

Wildner, Letícia Muraro; Bazzo, Maria Luiza; Liedke, Susie Coutinho; Nogueira, Christiane Lourenço; Segat, Gabriela; Senna, Simone Gonçalves; Schlindwein, Aline Daiane; de Oliveira, Jaquelline Germano; Rovaris, Darcita B; Bonjardim, Claudio A; Kroon, Erna G; Ferreira, Paulo CP

2014-01-01

33

Sliding Mode Control of a Mobile Robot for Dynamic Obstacle Avoidance Based on a Time-Varying Harmonic Potential Field  

Microsoft Academic Search

In this paper, a harmonic potential field method for dynamic environments is proposed to generate an on-line reference trajectory for a wheeled mobile robot. A sliding mode controller is used to make the robot move along the prescribed trajectory determined by the gradient lines. The potential field is modified on-line, in order to make the robot avoid the collision with

Antonella Ferrara

2007-01-01

34

Rapid prototyping of mobile context-aware applications: the Cyberguide case study  

Microsoft Academic Search

We present the Cyberguide project, in which we arebuilding prototypes of a mobile context-aware tour guidethat provide information to a tourist based on knowledgeof position and orientation. We describe featuresof existing Cyberguide prototypes and discuss researchissues that have emerged in our context-aware applicationsdevelopment in a mobile environment.Keywords: Mobile computing applications, contextawareness,location-dependent applications, hand-helddevices1 IntroductionThe...

Sue Long; Rob Kooper; Christopher G. Atkeson

1996-01-01

35

Amarino: a toolkit for the rapid prototyping of mobile ubiquitous computing  

Microsoft Academic Search

Ubicomp applications increasingly involve smart phones that control or communicate with embedded systems. Compelling examples in this space include tangible interfaces, environmental sensor networks, game controllers and automated homes. Across research, design, and hobbyist communities there is clearly a desire to build applications that involve combinations of mobile and non-mobile technologies. However, constructing these applications is a laborious process that

Bonifaz Kaufmann; Leah Buechley

2010-01-01

36

Influence of the elastic deformation of a foam on its mobility in channels of linearly varying width  

NASA Astrophysics Data System (ADS)

We study foam flow in an elementary model porous medium consisting of a convergent and a divergent channel positioned side by side and possessing a fixed joint porosity. Configurations of converging or diverging channels are ubiquitous at the pore scale in porous media, as all channels linking pores possess a converging and diverging part. The resulting flow kinematics imposes asymmetric bubble deformations in the two channels, which modulate foam-wall friction and strongly impact the flux distribution. We measure, as well as quantitatively predict, the ratio of the fluxes in the two channels as a function of the channel widths by modeling pressure drops of both viscous and capillary origins. This study reveals the crucial importance of boundary-induced bubble deformation on the mobility of a flowing foam, resulting in particular in flow irreversibility.

Dollet, Benjamin; Jones, Siân A.; Méheust, Yves; Cantat, Isabelle

2014-08-01

37

Rapid prototyping of an adaptive light-source for mobile manipulators with EasyKit and EasyLab  

NASA Astrophysics Data System (ADS)

While still not common in day-to-day business, mobile robot platforms form a growing market in robotics. Mobile platforms equipped with a manipulator for increased flexibility have been used successfully in biotech laboratories for sample management as shown on the well-known ESACT meetings. Navigation and object recognition is carried out by the utilization of a mounted machine vision camera. To cope with the different illumination conditions in a large laboratory, development of an adaptive light source was indispensable. We present our approach of rapid developing a computer controlled, adaptive LED light within one single business day, by utilizing the hardware toolbox EasyKit and our appropriate software counterpart EasyLab.

Wojtczyk, Martin; Barner, Simon; Geisinger, Michael; Knoll, Alois

2008-08-01

38

Genetic signature of population fragmentation varies with mobility in seven bird species of a fragmented Kenyan cloud forest.  

PubMed

Habitat fragmentation can restrict geneflow, reduce neighbourhood effective population size, and increase genetic drift and inbreeding in small, isolated habitat remnants. The extent to which habitat fragmentation leads to population fragmentation, however, differs among landscapes and taxa. Commonly, researchers use information on the current status of a species to predict population effects of habitat fragmentation. Such methods, however, do not convey information on species-specific responses to fragmentation. Here, we compare levels of past population differentiation, estimated from microsatellite genotypes, with contemporary dispersal rates, estimated from multi-strata capture-recapture models, to infer changes in mobility over time in seven sympatric, forest-dependent bird species of a Kenyan cloud forest archipelago. Overall, populations of sedentary species were more strongly differentiated and clustered compared to those of vagile ones, while geographical patterning suggested an important role of landscape structure in shaping genetic variation. However, five of seven species with broadly similar levels of genetic differentiation nevertheless differed substantially in their current dispersal rates. We conclude that post-fragmentation levels of vagility, without reference to past population connectivity, may not be the best predictor of how forest fragmentation affects the life history of forest-dependent species. As effective conservation strategies often hinge on accurate prediction of shifts in ecological and genetic relationships among populations, conservation practices based solely upon current population abundances or movements may, in the long term, prove to be inadequate. PMID:21492264

Callens, Tom; Galbusera, Peter; Matthysen, Erik; Durand, Eric Y; Githiru, Mwangi; Huyghe, Jeroen R; Lens, Luc

2011-05-01

39

Rapid imaging, detection and quantification of Giardia lamblia cysts using mobile-phone based fluorescent microscopy and machine learning.  

PubMed

Rapid and sensitive detection of waterborne pathogens in drinkable and recreational water sources is crucial for treating and preventing the spread of water related diseases, especially in resource-limited settings. Here we present a field-portable and cost-effective platform for detection and quantification of Giardia lamblia cysts, one of the most common waterborne parasites, which has a thick cell wall that makes it resistant to most water disinfection techniques including chlorination. The platform consists of a smartphone coupled with an opto-mechanical attachment weighing ~205 g, which utilizes a hand-held fluorescence microscope design aligned with the camera unit of the smartphone to image custom-designed disposable water sample cassettes. Each sample cassette is composed of absorbent pads and mechanical filter membranes; a membrane with 8 ?m pore size is used as a porous spacing layer to prevent the backflow of particles to the upper membrane, while the top membrane with 5 ?m pore size is used to capture the individual Giardia cysts that are fluorescently labeled. A fluorescence image of the filter surface (field-of-view: ~0.8 cm(2)) is captured and wirelessly transmitted via the mobile-phone to our servers for rapid processing using a machine learning algorithm that is trained on statistical features of Giardia cysts to automatically detect and count the cysts captured on the membrane. The results are then transmitted back to the mobile-phone in less than 2 minutes and are displayed through a smart application running on the phone. This mobile platform, along with our custom-developed sample preparation protocol, enables analysis of large volumes of water (e.g., 10-20 mL) for automated detection and enumeration of Giardia cysts in ~1 hour, including all the steps of sample preparation and analysis. We evaluated the performance of this approach using flow-cytometer-enumerated Giardia-contaminated water samples, demonstrating an average cyst capture efficiency of ~79% on our filter membrane along with a machine learning based cyst counting sensitivity of ~84%, yielding a limit-of-detection of ~12 cysts per 10 mL. Providing rapid detection and quantification of microorganisms, this field-portable imaging and sensing platform running on a mobile-phone could be useful for water quality monitoring in field and resource-limited settings. PMID:25537426

Koydemir, Hatice Ceylan; Gorocs, Zoltan; Tseng, Derek; Cortazar, Bingen; Feng, Steve; Chan, Raymond Yan Lok; Burbano, Jordi; McLeod, Euan; Ozcan, Aydogan

2015-02-16

40

Rapid alterations in lateral mobility of lipids in the plasma membrane of activated human megakaryocytes.  

PubMed

In the present study we measured membrane fluidity as the lateral mobility of the lipid probe 1,1'-ditetradecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate by fluorescence recovery after photobleaching in the plasma membrane of a single megakaryocyte, the progenitor cell of platelets. Megakaryocytes after 13 days in culture (maturation stage III) had a lateral diffusion coefficient (D) of (4.56 +/- 0.10) x 10(-9) cm2/s and a mobile fraction of 65 +/- 2% (means +/- SEM, n = 140). Megakaryocytes isolated from rib had a similar D and mobile fraction. Stimulation with alpha-thrombin (1-10 U/ml) induced a dose-dependent decrease in D to (3.40 +/- 0.22) x 10(-9) cm2/s between 1-5 min after stimulation (P < 0.001). The mobile fraction did not change. A similar decrease in D was found following stimulation with ADP (20 microM) and ionomycin (100 nM). Modulation of calpain I activity with calpain I inhibitor or tetracain had no effect. Pretreatment with cytochalasin B or colchicine decreased D to (3.64 +/- 0.29) x 10(-9) cm2/s (P < 0.003) and (3.96 +/- 0.18) x 10(-9) cm2/s (P < 0.013) respectively. After stimulation D decreased further in cytochalasin-treated cells (3.37 +/- 0.16) x 10(-9) cm2/s (P < 0.020) but remained at the same level in colchicine-treated cells. Both treatments increased the mobile fraction to 73-75% in stimulated megakaryocytes (P < 0.03). These data indicate that the diffusion velocity of lipids in megakaryocytes is low and decreases further after stimulation. These changes are independent of calpain I. Treatments that decrease the cytoskeletal mass and thereby increase the mobility of proteins in the plasma membrane increase the number of lipids that participate in this process. PMID:8168523

Schootemeijer, A; van Beekhuizen, A E; Gorter, G; Tertoolen, L G; de Laat, S W; Akkerman, J W

1994-04-01

41

[Study of mobile Raman spectroscopy for rapid evaluation of deteriorating of art materials under UV irradiation].  

PubMed

Identification and characterization of materials used in cultural heritage and conservation can provide important information for dating, authentication and deteriorating situation in general. How to extract useful information from these materials in-situ is one of the main concerns. Application of mobile Raman spectroscopy for this purpose has great attentions for scientists and conservators. The present paper aims to investigate the mobile Raman spectroscopy in studying the effect of UV light on the deterioration of silk, seal ink and Chinese traditional colorants such as kermes, vermillion and zhubiao, which is commonly appeared on painted works of art, and the silk sample is also often used as an consolidant for repairing destroyed textile objects. Spectra were recorded from predefined regions on the samples before and after ultraviolet radiation with 360 nm wavelength and 0.68 W x m(-2) intensity. The result revealed obvious effects of ultraviolet radiation on the materials simulated in this research. The original kind of seal ink has been clearly identified. The changes in spectra of all samples with and without UV radiation were further distinguished and studied. The result will assist for scientists and conservators to determine the safe treatments and suitable environmental condition for storage, display and transport. The result will also help for studying mechanism of deterioration of museum objects influenced by environmental factors. The mobile Raman spectroscopy showed a suitable and convenient means for in-situ non-destructive detection and study of deterioration in practical conditions. PMID:21105406

Luo, Xi-yun; Ye, Fei; Wu, Lai-ming; Yuan, Sheng-wei; Zhang, Wei-bing; Du, Yi-ping

2010-09-01

42

Rapid, in situ detection of cocaine residues based on paper spray ionization coupled with ion mobility spectrometry.  

PubMed

In this paper, a novel approach based on paper spray ionization coupled with ion mobility spectrometry (PSI-IMS) was developed for rapid, in situ detection of cocaine residues in liquid samples and on various surfaces (e.g. glass, marble, skin, wood, fingernails), without tedious sample pretreatment. The obvious advantages of PSI are its low cost, easy operation and simple configuration without using nebulizing gas or discharge gas. Compared with mass spectrometry, ion mobility spectrometry (IMS) takes advantage of its low cost, easy operation, and simple configuration without requiring a vacuum system. Therefore, IMS is a more congruous detection method for PSI in the case of rapid, in situ analysis. For the analysis of cocaine residues in liquid samples, dynamic responses from 5 ?g mL(-1) to 200 ?g mL(-1) with a linear coefficient (R(2)) of 0.992 were obtained. In this case, the limit of detection (LOD) was calculated to be 2 ?g mL(-1) as signal to noise (S/N) was 3 with a relative standard deviation (RSD) of 6.5% for 11 measurements (n = 11). Cocaine residues on various surfaces such as metal, glass, marble, wood, skin, and fingernails were also directly analyzed before wiping the surfaces with a piece of paper. The LOD was calculated to be as low as 5 ng (S/N = 3, RSD = 6.3%, n = 11). This demonstrates the capability of the PSI-IMS method for direct detection of cocaine residues at scenes of cocaine administration. Our results show that PSI-IMS is a simple, sensitive, rapid and economical method for in situ detection of this illicit drug, which could help governments to combat drug abuse. PMID:24563903

Li, Ming; Zhang, Jingjing; Jiang, Jie; Zhang, Jing; Gao, Jing; Qiao, Xiaolin

2014-04-01

43

A Mobile Acoustic Subsurface Sensing (MASS) system for rapid roadway assessment.  

PubMed

Surface waves are commonly used for vibration-based nondestructive testing for infrastructure. Spectral Analysis of Surface Waves (SASW) has been used to detect subsurface properties for geologic inspections. Recently, efforts were made to scale down these subsurface detection approaches to see how they perform on small-scale structures such as concrete slabs and pavements. Additional efforts have been made to replace the traditional surface-mounted transducers with non-contact acoustic transducers. Though some success has been achieved, most of these new approaches are inefficient because they require point-to-point measurements or off-line signal analysis. This article introduces a Mobile Acoustic Subsurface Sensing system as MASS, which is an improved surface wave based implementation for measuring the subsurface profile of roadways. The compact MASS system is a 3-wheeled cart outfitted with an electromagnetic impact source, distance register, non-contact acoustic sensors and data acquisition/ processing equipment. The key advantage of the MASS system is the capability to collect measurements continuously at walking speed in an automatic way. The fast scan and real-time analysis advantages are based upon the non-contact acoustic sensing and fast air-coupled surface wave analysis program. This integration of hardware and software makes the MASS system an efficient mobile prototype for the field test. PMID:23698266

Lu, Yifeng; Zhang, Yi; Cao, Yinghong; McDaniel, J Gregory; Wang, Ming L

2013-01-01

44

Rapid Force Generation is Impaired in Cerebral Palsy and is Related to Decreased Muscle Size and Functional Mobility  

PubMed Central

Limb movements involving contraction times of 50–200ms occur in many everyday activities, such as gait, which is faster than the time required to generate maximal force. Therefore, the ability to rapidly produce force may be even more important for the performance of functional activities. In this study rate of force development (RFD) and impulse of the knee extensors were examined in 12 ambulatory children with cerebral palsy (CP) (Age:11.9 ± 2.9 yrs) and 11 with typical development (TD) (Age: 11.3 ± 3.0 yrs). The relationship with muscle architecture and functional mobility was also determined. RFD and impulse were calculated during a maximal isometric knee extension contraction. Rectus femoris (RF) cross-sectional area and RF and vastus lateralis (VL) muscle thickness (MT), fascicle length (FL), and fascicle angle (FA) were measured using ultrasound imaging. Gait temporal-spatial parameters, Pediatric Outcomes Data Collection Instrument (PODCI), and Activities Scale for Kids performane version (ASKp) were collected. Although VL MT was the primary determinant of RFD and impulse in CP, FA and FL were also significant predictors in the TD group. RFD and impulse were significantly lower in CP compared to TD (70% decrease) in addition to maximal strength (50% decrease). RFD and impulse were predictive of measures of functional mobility, including gait, transfers, and sports and higher level activities but not temporal-spatial gait measures. Results suggest that the ability to rapidly generate torque may be of greater importance than maximal strength during certain tasks, such as transfers and sports and higher level activities. PMID:21930383

Moreau, Noelle G.; Falvo, Michael; Damiano, Diane L.

2011-01-01

45

Rapid Mitochondrial Genome Evolution through Invasion of Mobile Elements in Two Closely Related Species of Arbuscular Mycorrhizal Fungi  

PubMed Central

Arbuscular mycorrhizal fungi (AMF) are common and important plant symbionts. They have coenocytic hyphae and form multinucleated spores. The nuclear genome of AMF is polymorphic and its organization is not well understood, which makes the development of reliable molecular markers challenging. In stark contrast, their mitochondrial genome (mtDNA) is homogeneous. To assess the intra- and inter-specific mitochondrial variability in closely related Glomus species, we performed 454 sequencing on total genomic DNA of Glomus sp. isolate DAOM-229456 and we compared its mtDNA with two G. irregulare isolates. We found that the mtDNA of Glomus sp. is homogeneous, identical in gene order and, with respect to the sequences of coding regions, almost identical to G. irregulare. However, certain genomic regions vary substantially, due to insertions/deletions of elements such as introns, mitochondrial plasmid-like DNA polymerase genes and mobile open reading frames. We found no evidence of mitochondrial or cytoplasmic plasmids in Glomus species, and mobile ORFs in Glomus are responsible for the formation of four gene hybrids in atp6, atp9, cox2, and nad3, which are most probably the result of horizontal gene transfer and are expressed at the mRNA level. We found evidence for substantial sequence variation in defined regions of mtDNA, even among closely related isolates with otherwise identical coding gene sequences. This variation makes it possible to design reliable intra- and inter-specific markers. PMID:23637766

Beaudet, Denis; Nadimi, Maryam; Iffis, Bachir; Hijri, Mohamed

2013-01-01

46

Rapid and Accurate Detection of Urinary Pathogens by Mobile IMS-Based Electronic Nose: A Proof-of-Principle Study  

PubMed Central

Urinary tract infection (UTI) is a common disease with significant morbidity and economic burden, accounting for a significant part of the workload in clinical microbiology laboratories. Current clinical chemisty point-of-care diagnostics rely on imperfect dipstick analysis which only provides indirect and insensitive evidence of urinary bacterial pathogens. An electronic nose (eNose) is a handheld device mimicking mammalian olfaction that potentially offers affordable and rapid analysis of samples without preparation at athmospheric pressure. In this study we demonstrate the applicability of ion mobility spectrometry (IMS) –based eNose to discriminate the most common UTI pathogens from gaseous headspace of culture plates rapidly and without sample preparation. We gathered a total of 101 culture samples containing four most common UTI bacteries: E. coli, S. saprophyticus, E. faecalis, Klebsiella spp and sterile culture plates. The samples were analyzed using ChemPro 100i device, consisting of IMS cell and six semiconductor sensors. Data analysis was conducted by linear discriminant analysis (LDA) and logistic regression (LR). The results were validated by leave-one-out and 5-fold cross validation analysis. In discrimination of sterile and bacterial samples sensitivity of 95% and specificity of 97% were achieved. The bacterial species were identified with sensitivity of 95% and specificity of 96% using eNose as compared to urine bacterial cultures. In conclusion: These findings strongly demonstrate the ability of our eNose to discriminate bacterial cultures and provides a proof of principle to use this method in urinanalysis of UTI. PMID:25526592

Roine, Antti; Saviauk, Taavi; Kumpulainen, Pekka; Karjalainen, Markus; Tuokko, Antti; Aittoniemi, Janne; Vuento, Risto; Lekkala, Jukka; Lehtimäki, Terho; Tammela, Teuvo L.; Oksala, Niku K. J.

2014-01-01

47

Pocket pathologist: A mobile application for rapid diagnostic surgical pathology consultation  

PubMed Central

Introduction: Telepathology allows the digital transmission of images for rapid access to pathology experts. Recent technologic advances in smartphones have allowed them to be used to acquire and transmit digital images of the glass slide, representing cost savings and efficiency gains over traditional forms of telepathology. We report our experience with developing an iPhone application (App - Pocket Pathologist) to facilitate rapid diagnostic pathology teleconsultation utilizing a smartphone. Materials and Methods: A secure, web-based portal (http://pathconsult.upmc.com/) was created to facilitate remote transmission of digital images for teleconsultation. The App augments functionality of the web-based portal and allows the user to quickly and easily upload digital images for teleconsultation. Image quality of smartphone cameras was evaluated by capturing images using different adapters that directly attach phones to a microscope ocular lens. Results: The App was launched in August 2013. The App facilitated easy submission of cases for teleconsultation by limiting the number of data entry fields for users and enabling uploading of images from their smartphone's gallery wirelessly. Smartphone cameras properly attached to a microscope create static digital images of similar quality to a commercial digital microscope camera. Conclusion: Smartphones have great potential to support telepathology because they are portable, provide ubiquitous internet connectivity, contain excellent digital cameras, and can be easily attached to a microscope. The Pocket Pathologist App represents a significant reduction in the cost of creating digital images and submitting them for teleconsultation. The iPhone App provides an easy solution for global users to submit digital pathology images to pathology experts for consultation. PMID:24843822

Hartman, Douglas J.; Parwani, Anil V.; Cable, Bill; Cucoranu, Ioan C.; McHugh, Jeff S.; Kolowitz, Brian J.; Yousem, Samuel A.; Palat, Vijaykumar; Reden, Anna Von; Sloka, Stephen; Lauro, Gonzalo Romero; Ahmed, Ishtiaque; Pantanowitz, Liron

2014-01-01

48

Mobile laboratory with rapid response instruments for real-time measurements of urban and regional trace gas and particulate distributions and emission source characteristics.  

PubMed

Recent technological advances have allowed the development of robust, relatively compact, low power, rapid response (approximately 1 s) instruments with sufficient sensitivity and specificity to quantify many trace gases and aerosol particle components in the ambient atmosphere. Suites of such instruments can be deployed on mobile platforms to study atmospheric processes, map concentration distributions of atmospheric pollutants, and determine the composition and intensities of emission sources. A mobile laboratory containing innovative tunable infrared laser differential absorption spectroscopy (TILDAS) instruments to measure selected trace gas concentrations at sub parts-per-billion levels and an aerosol mass spectrometer (AMS) to measure size resolved distributions of the nonrefractory chemical components of fine airborne particles as well as selected commercial fast response instruments and position/velocity sensors is described. Examples of the range of measurement strategies that can be undertaken using this mobile laboratory are discussed, and samples of measurement data are presented. PMID:15575289

Kolb, Charles E; Herndon, Scott C; McManus, J Barry; Shorter, Joanne H; Zahniser, Mark S; Nelson, David D; Jayne, John T; Canagaratna, Manjula R; Worsnop, Douglas R

2004-11-01

49

Kinect Technology Game Play to Mimic Quake Catcher Network (QCN) Sensor Deployment During a Rapid Aftershock Mobilization Program (RAMP)  

NASA Astrophysics Data System (ADS)

The Kinect technology allows for hands-free game play, greatly increasing the accessibility of gaming for those uncomfortable using controllers. How it works is the Kinect camera transmits invisible near-infrared light and measures its "time of flight" to reflect off an object, allowing it to distinguish objects within 1 centimeter in depth and 3 mm in height and width. The middleware can also respond to body gestures and voice commands. Here, we use the Kinect Windows SDK software to create a game that mimics how scientists deploy seismic instruments following a large earthquake. The educational goal of the game is to allow the players to explore 3D space as they learn about the Quake Catcher Network's (QCN) Rapid Aftershock Mobilization Program (RAMP). Many of the scenarios within the game are taken from factual RAMP experiences. To date, only the PC platform (or a Mac running PC emulator software) is available for use, but we hope to move to other platforms (e.g., Xbox 360, iPad, iPhone) as they become available. The game is written in programming language C# using Microsoft XNA and Visual Studio 2010, graphic shading is added using High Level Shader Language (HLSL), and rendering is produced using XNA's graphics libraries. Key elements of the game include selecting sensor locations, adequately installing the sensor, and monitoring the incoming data. During game play aftershocks can occur unexpectedly, as can other problems that require attention (e.g., power outages, equipment failure, and theft). The player accrues points for quickly deploying the first sensor (recording as many initial aftershocks as possible), correctly installing the sensors (orientation with respect to north, properly securing, and testing), distributing the sensors adequately in the region, and troubleshooting problems. One can also net points for efficient use of game play time. Setting up for game play in your local environment requires: (1) the Kinect hardware ( $145); (2) a computer with a Windows operating system (Mac users can use a Windows emulator); and (3) our free QCN game software (available from http://quakeinfo.ucsd.edu/ dkilb/WEB/QCN/Downloads.html).

Kilb, D. L.; Yang, A.; Rohrlick, D.; Cochran, E. S.; Lawrence, J.; Chung, A. I.; Neighbors, C.; Choo, Y.

2011-12-01

50

Developing a Control Architecture for Multiple Unmanned Aerial Vehicles to Search and Localize RF Time-Varying Mobile Targets: Part I  

Microsoft Academic Search

In this paper, we present a control architecture that allows multiple Unmanned Aerial Vehicles (UAVs) to cooperatively detect mobile RF (Radio Frequency) emitting ground targets. The architecture is developed under the premise that UAVs are controlled as a distributed system. The distributed system-based technique maximizes the search and detection capabilities of multiple UAVs. We use a hybrid approach that combines

Daniel J. Pack; George W. P. York

2005-01-01

51

In the near future, off-road mobile robots will feature high levels of autonomy which will render them useful for a vari-  

E-print Network

straight-forward con- sideration of vehicle dynamics. 1 Introduction As developing autonomous off-roadPage 1 Abstract In the near future, off-road mobile robots will feature high levels of autonomy quite well for applications on paved sur- faces. Off-road conditions certainly make things more diffi

Kelly, Alonzo

52

Adaptive optimization of least-squares tracking algorithms: with applications to adaptive antenna arrays for randomly time-varying mobile communications systems  

Microsoft Academic Search

Adaptive antenna arrays are used for reducing the effects of interference and increasing capacity in mobile communications systems. Typical algorithms recursively compute the antenna weights that minimize the weighted error function (at discrete times kh, k=1,2,..., for a sampling interval h) ?l=1k?k-l[el(W)]2, where el(W) is a measure of the reception error at time lh with antenna weight vector W, and

Robert Buche; Harold J. Kushner

2005-01-01

53

Rapid and long-term effects of water deficit on gas exchange and hydraulic conductance of silver birch trees grown under varying atmospheric humidity  

PubMed Central

Background Effects of water deficit on plant water status, gas exchange and hydraulic conductance were investigated in Betula pendula under artificially manipulated air humidity in Eastern Estonia. The study was aimed to broaden an understanding of the ability of trees to acclimate with the increasing atmospheric humidity predicted for northern Europe. Rapidly-induced water deficit was imposed by dehydrating cut branches in open-air conditions; long-term water deficit was generated by seasonal drought. Results The rapid water deficit quantified by leaf (?L) and branch water potentials (?B) had a significant (P?rapid water deficit with respect to two characteristics - leaf conductance to water vapour and leaf hydraulic conductance. Disproportionate changes in sensitivity of stomatal versus leaf hydraulic conductance to water deficit will impose greater risk of desiccation-induced hydraulic dysfunction on the plants, grown under high atmospheric humidity, in case of sudden weather fluctuations, and might represent a potential threat in hemiboreal forest ecosystems. There is no trade-off between plant hydraulic capacity and photosynthetic water-use efficiency on short time scale. PMID:24655599

2014-01-01

54

High mobility of bicoid captured by fluorescence correlation spectroscopy: implication for the rapid establishment of its gradient.  

PubMed

The Bicoid (Bcd) morphogen is essential for pattern formation in fruit flies. It forms an exponential concentration gradient along the embryo AP axis and turns on cascades of target genes in distinct anterior domains. The most commonly accepted model for gradient formation assumes that Bcd travels by simple diffusion and is uniformly degraded across syncytial embryos, yet several recent studies have challenged these ideas. Here, the question of Bcd mobility was investigated using fluorescence correlation spectroscopy in live Drosophila melanogaster embryos. Bcd-EGFP molecules were found to be highly mobile in the cytoplasm during cycles 12-14, with a diffusion coefficient approximately 7 microm(2)/s. This value is large enough to explain the stable establishment of the Bcd gradient simply by diffusion before cycle 8, i.e., before the onset of zygotic transcription. PMID:20712981

Abu-Arish, Asmahan; Porcher, Aude; Czerwonka, Anna; Dostatni, Nathalie; Fradin, Cécile

2010-08-01

55

High Mobility of Bicoid Captured by Fluorescence Correlation Spectroscopy: Implication for the Rapid Establishment of Its Gradient  

PubMed Central

The Bicoid (Bcd) morphogen is essential for pattern formation in fruit flies. It forms an exponential concentration gradient along the embryo AP axis and turns on cascades of target genes in distinct anterior domains. The most commonly accepted model for gradient formation assumes that Bcd travels by simple diffusion and is uniformly degraded across syncytial embryos, yet several recent studies have challenged these ideas. Here, the question of Bcd mobility was investigated using fluorescence correlation spectroscopy in live Drosophila melanogaster embryos. Bcd-EGFP molecules were found to be highly mobile in the cytoplasm during cycles 12–14, with a diffusion coefficient ?7 ?m2/s. This value is large enough to explain the stable establishment of the Bcd gradient simply by diffusion before cycle 8, i.e., before the onset of zygotic transcription. PMID:20712981

Abu-Arish, Asmahan; Porcher, Aude; Czerwonka, Anna; Dostatni, Nathalie; Fradin, Cécile

2010-01-01

56

Mobilized peripheral blood stem cells provide rapid reconstitution but impaired long-term engraftment in a mouse model  

Microsoft Academic Search

In this study, we use competitive repopulation to compare the quality and frequency of stem cells isolated from mobilized blood with stem cells isolated from bone marrow (BM) in a mouse model. Lin?Sca-1+c-Kit+ (LSK) cells were harvested from control BM and peripheral blood of mice following granulocyte colony-stimulating factor (G-CSF) administration. LSK cells were used because of their resemblance to

J S G Yeoh; A Ausema; P Wierenga; G de Haan; R van Os

2007-01-01

57

The freedom to explore: examining the influence of independent mobility on weekday, weekend and after-school physical activity behaviour in children living in urban and inner-suburban neighbourhoods of varying socioeconomic status  

PubMed Central

Background Children’s independent mobility (CIM) is critical to healthy development in childhood. The physical layout and social characteristics of neighbourhoods can impact opportunities for CIM. While global evidence is mounting on CIM, to the authors’ knowledge, Canadian data on CIM and related health outcomes (i.e., physical activity (PA) behaviour) are missing. The purpose of this study was to examine if CIM is related to multiple characteristics of accelerometry-measured PA behaviour (total PA, light PA, moderate-to-vigorous PA, time spent sedentary) and whether associations between CIM and PA behaviour systematically vary by place of residence, stratifying by gender and type of day/period (weekdays, after-school, weekend). Methods Participants were recruited through Project BEAT (Built Environment and Active Transport; http://www.beat.utoronto.ca). Children (n?=?856) were stratified into four neighbourhood classifications based on the period of neighbourhood development (urban built environment (BE) (old BE) versus inner-suburban BE (new BE)) and socioeconomic status (SES; low SES and high SES). Physical activity was measured via accelerometry (ActiGraph GT1M). CIM was assessed via parental report and two categories were created (low CIM, n?=?332; high CIM, n?=?524). A series of two-factor ANOVAs were used to determine gender-specific differences in PA for weekdays, weekend days and the after-school period, according to level of CIM, across four neighbourhood classifications. Results Children who were granted at least some independent mobility (high CIM) had more positive PA profiles across the school week, during the after-school period, and over the weekend; they were also less sedentary. The influence of CIM on PA behaviour was particularly salient during the after-school period. Associations of CIM with PA varied by gender, and also by neighbourhood classification. CIM seemed to matter more in urban neighbourhoods for boys and suburban neighbourhoods for girls. Conclusion Our findings highlight the importance of independent mobility to multiple characteristics of children’s PA behaviour across the week. Furthermore, they emphasize that independent mobility-activity relationships need to be considered by gender and the type of neighbourhood independent mobility is offered in. Future work will focus on developing a predictive model of CIM that could be used to inform decision-making around alleviating barriers to CIM. PMID:24450739

2014-01-01

58

Diabetic state-induced rapid inactivation of noncontractile Ca2+ mobilization operated by nicotinic acetylcholine receptor in mouse diaphragm muscle.  

PubMed Central

1. Diabetic modifications of nicotinic receptor-operated noncontractile Ca2- mobilization observed in the presence of anticholinesterase were investigated by measuring Ca(2+)-aequorin luminescence in diaphragm muscles of mice with diabetes induced by injections of streptozotocin (150 mg kg-1, bolus i.v.) and alloxan (85 mg kg-1, bolus i.v.). 2. The diabetic state accelerated the decline of noncontractile Ca2+ transients without affecting their peak amplitude. Insulin treatment reversed this alteration. 3. The increase in contractile Ca2+ transients by cholinesterase inhibition was attenuated 0.6 fold and became resistant to changes in [Ca2+]o in the diabetic state. 4. Changes in extracellular pH from 7.6 to 5.6 depressed the peak amplitude of noncontractile Ca2+ transients without affecting their duration, and enhanced the peak amplitude of contractile Ca2+ transients. 5. These results suggest that the inactivation process of noncontractile Ca2+ mobilization is promoted in diabetic muscles, presumably by desensitization of the nicotinic acetylcholine receptor. PMID:8590990

Kimura, I.; Tsuneki, H.; Dezaki, K.; Kimura, M.

1995-01-01

59

Direct Infusion Electrospray Ionization - Ion Mobility - High Resolution Mass Spectrometry (DIESI-IM-HRMS) for Rapid Characterization of Potential Bioprocess Streams  

NASA Astrophysics Data System (ADS)

Direct infusion electrospray ionization - ion mobility - high resolution mass spectrometry (DIESI-IM-HRMS) has been utilized as a rapid technique for the characterization of total molecular composition in "whole-sample" biomass hydrolysates and extracts. IM-HRMS data reveal a broad molecular weight distribution of sample components (up to 1100 m/z) and provide trendline isolation of feedstock components from those introduced "in process." Chemical formulas were obtained from HRMS exact mass measurements (with typical mass error less than 5 ppm) and were consistent with structural carbohydrates and other lignocellulosic degradation products. Analyte assignments are supported via IM-MS collision-cross-section measurements and trendline analysis (e.g., all carbohydrate oligomers identified in a corn stover hydrolysate were found to fall within 6 % of an average trendline). These data represent the first report of collision cross sections for several negatively charged carbohydrates and other acidic species occurring natively in biomass hydrolysates.

Munisamy, Sharon M.; Chambliss, C. Kevin; Becker, Christopher

2012-07-01

60

Browsing on Mobile Phones  

Microsoft Academic Search

The popularity of mobile browsing varies between countries. In South Korea and Japan, the mobile browser is widely used for mobile specific services. In Europe, the popularity of WAP services is increasing all the time, but they still are not in everyman's use. In the U. S., mobile phones are not used for browsing, but people access the full Web

Virpi Roto

2005-01-01

61

Automatic dilution gaging of rapidly varying flow  

USGS Publications Warehouse

Obtaining discharge ratings at urban gaging stations is often difficult. Results of using an automated constant-rate dye-dilution technique to measure discharge at two sites in Madison, Wisconsin, are presented. The sites selected have well-defined stage-discharge ratings, developed during previous hydrologic studies. One site is a 60-inch-diameter concrete storm sewer and the other a concrete-lined open trapezoidal channel. Equipment selected to automate the method included a portable automatic water sampler, four-channel event recorder; and for dye injection, a peristaltic pump. An electrical switching circuit was designed to coordinate the operation of the water sampler, injection pump, and four-channel recorder. During the data-collection period of 1 year, a total of 20 storms was monitored. The analyses showed that the discharges measured by dye-dilution techniques ranged from + or - 5 to + or - 10 percent of the discharges determined from ratings established by current-meter measurements. Larger differences were noted at the start of and on the rising limb of four hydrographs. Of the 20 storms monitored, 17 produced acceptable results. Peak discharges by the dilution method at the open-channel site ranged from 0 to 12 percent departures from the existing rating, whereas the peak discharge by the dilution method at the storm-sewer site ranged from 0 to 5 percent departures from the existing rating. (UGGS)

Duerk, M.D.

1983-01-01

62

Gravity action on the rapidly varying metrics  

E-print Network

We consider a four-dimensional simplicial complex and the minisuperspace general relativity system described by the metric flat in the most part of the interior of every 4-simplex with exception of a thin layer of thickness $\\propto \\varepsilon$ along the every three-dimensional face where the metric undergoes jump between the two 4-simplices sharing this face. At $\\varepsilon \\to 0$ this jump would become discontinuity. Since, however, discontinuity of the (induced on the face) metric is not allowed in general relativity, the terms in the Einstein action tending to infinity at $\\varepsilon \\to 0$ arise. In the path integral approach, these terms lead to the pre-exponent factor with \\dfuns requiring that the induced on the faces metric be continuous, i. e. the 4-simplices fit on their common faces. The other part of the path integral measure corresponds to the action being the sum of independent terms over the 4-simplices. Therefore this part of the path integral measure is the product of independent measures over the 4-simplices. The result obtained is in accordance with our previous one obtained from the symmetry considerations.

V. M. Khatsymovsky

2010-05-01

63

Behaviour of mobile macrofauna is a key factor in beach ecology as response to rapid environmental changes  

NASA Astrophysics Data System (ADS)

Sandy beach animals show behavioural adaptations that are expressed as contingencies during the life history of individuals to face periodic and episodic environmental changes. Such adaptations include activity rhythms, orientation, zonation, burrowing, escape responses and feeding strategies, the first two being common adaptations to all mobile animals. The complex conditions of a particular beach environment may be integrated in a learning process enhancing the adaptation and survival of individuals and eventually of populations. Evidence exists of genetic determination of some behavioural features that are adaptive in the long term (throughout generations) by increasing individual survival and reproductive potential. The environmental features integrated with the life history of beach animals shape the individual behaviour through ontogenetic processes, as well as population behaviour through evolutionary processes. Thus, behavioural differences among individuals may reflect environmental variation at the local and small/medium temporal scales of beach processes, whereas within-population behavioural coherence and differences among populations may reflect variation at the geographic scale. The different foci stressed by different authors and the variety of evidence dependent upon local geographical and ecological conditions have often resulted in compartmentalised explanations, making generalizations and the repeatability of behavioural studies of beach ecology challenging. There was a need to developing a more synthetic paradigm for beach animal behaviour. This paper gives a brief overview of the theoretical background and keystone studies, which have contributed to our understanding of animal behaviour in sandy beach ecology, and proposes testable hypotheses to be integrated in the beach ecology paradigm.

Scapini, Felicita

2014-10-01

64

Rapid and mobile determination of alcoholic strength in wine, beer and spirits using a flow-through infrared sensor  

PubMed Central

Background Ever since Gay-Lussac's time, the alcoholic strength by volume (% vol) has been determined by using densimetric measurements. The typical reference procedure involves distillation followed by pycnometry, which is comparably labour-intensive and therefore expensive. At present, infrared (IR) spectroscopy in combination with multivariate regression is widely applied as a screening procedure, which allows one to determine alcoholic strength in less than 2 min without any sample preparation. The disadvantage is the relatively large investment for Fourier transform (FT) IR or near-IR instruments, and the need for matrix-dependent calibration. In this study, we apply a much simpler device consisting of a patented multiple-beam infrared sensor in combination with a flow-through cell for automated alcohol analysis, which is available in a portable version that allows for on-site measurements. Results During method validation, the precision of the infrared sensor was found to be equal to or better than densimetric or FTIR methods. For example, the average repeatability, as determined in 6 different wine samples, was 0.05% vol and the relative standard deviation was below 0.2%. Accuracy was ensured by analyzing 260 different alcoholic beverages in comparison to densimetric or FTIR results. The correlation was linear over the entire range from alcohol-free beers up to high-proof spirits, and the results were in substantial agreement (R = 0.99981, p < 0.0001, RMSE = 0.279% vol). The applicability of the device was further proven for the analysis of wines during fermentation, and for the determination of unrecorded alcohol (i.e. non-commercial or illicit products). Conclusions The flow-through infrared device is much easier to handle than typical reference procedures, while time-consuming sample preparation steps such as distillation are not necessary. Therefore, the alcoholic strength can be economically and quickly controlled (requiring less than 60 s per sample). The device also gives the opportunity for mobile on-site control in the context of labelling control of wine, beer and spirits, the process monitoring of fermentations, or the evaluation of unrecorded alcohols. PMID:20331845

2010-01-01

65

Rapid Accumulation of Phosphatidylinositol 4,5-Bisphosphate and Inositol 1,4,5-Trisphosphate Correlates with Calcium Mobilization in Salt-Stressed Arabidopsis1  

PubMed Central

The phosphoinositide phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P2] is a key signaling molecule in animal cells. It can be hydrolyzed to release 1,2-diacyglycerol and inositol 1,4,5-trisphosphate (IP3), which in animal cells lead to protein kinase C activation and cellular calcium mobilization, respectively. In addition to its critical roles in constitutive and regulated secretion of proteins, PtdIns(4,5)P2 binds to proteins that modify cytoskeletal architecture and phospholipid constituents. Herein, we report that Arabidopsis plants grown in liquid media rapidly increase PtdIns(4,5)P2 synthesis in response to treatment with sodium chloride, potassium chloride, and sorbitol. These results demonstrate that when challenged with salinity and osmotic stress, terrestrial plants respond differently than algae, yeasts, and animal cells that accumulate different species of phosphoinositides. We also show data demonstrating that whole-plant IP3 levels increase significantly within 1 min of stress initiation, and that IP3 levels continue to increase for more than 30 min during stress application. Furthermore, using the calcium indicators Fura-2 and Fluo-3 we show that root intracellular calcium concentrations increase in response to stress treatments. Taken together, these results suggest that in response to salt and osmotic stress, Arabidopsis uses a signaling pathway in which a small but significant portion of PtdIns(4,5)P2 is hydrolyzed to IP3. The accumulation of IP3 occurs during a time frame similar to that observed for stress-induced calcium mobilization. These data also suggest that the majority of the PtdIns(4,5)P2 synthesized in response to salt and osmotic stress may be utilized for cellular signaling events distinct from the canonical IP3 signaling pathway. PMID:11402204

DeWald, Daryll B.; Torabinejad, Javad; Jones, Christopher A.; Shope, Joseph C.; Cangelosi, Amanda R.; Thompson, James E.; Prestwich, Glenn D.; Hama, Hiroko

2001-01-01

66

Time varying networks and the weakness of strong ties.  

PubMed

In most social and information systems the activity of agents generates rapidly evolving time-varying networks. The temporal variation in networks' connectivity patterns and the ongoing dynamic processes are usually coupled in ways that still challenge our mathematical or computational modelling. Here we analyse a mobile call dataset and find a simple statistical law that characterize the temporal evolution of users' egocentric networks. We encode this observation in a reinforcement process defining a time-varying network model that exhibits the emergence of strong and weak ties. We study the effect of time-varying and heterogeneous interactions on the classic rumour spreading model in both synthetic, and real-world networks. We observe that strong ties severely inhibit information diffusion by confining the spreading process among agents with recurrent communication patterns. This provides the counterintuitive evidence that strong ties may have a negative role in the spreading of information across networks. PMID:24510159

Karsai, Márton; Perra, Nicola; Vespignani, Alessandro

2014-01-01

67

Time varying networks and the weakness of strong ties  

PubMed Central

In most social and information systems the activity of agents generates rapidly evolving time-varying networks. The temporal variation in networks' connectivity patterns and the ongoing dynamic processes are usually coupled in ways that still challenge our mathematical or computational modelling. Here we analyse a mobile call dataset and find a simple statistical law that characterize the temporal evolution of users' egocentric networks. We encode this observation in a reinforcement process defining a time-varying network model that exhibits the emergence of strong and weak ties. We study the effect of time-varying and heterogeneous interactions on the classic rumour spreading model in both synthetic, and real-world networks. We observe that strong ties severely inhibit information diffusion by confining the spreading process among agents with recurrent communication patterns. This provides the counterintuitive evidence that strong ties may have a negative role in the spreading of information across networks. PMID:24510159

Karsai, Márton; Perra, Nicola; Vespignani, Alessandro

2014-01-01

68

Jebeile. The Mobile Subject Assistant THE MOBILE SUBJECT ASSISTANT: A MOBILE COURSE TOOL  

E-print Network

Jebeile. The Mobile Subject Assistant THE MOBILE SUBJECT ASSISTANT: A MOBILE COURSE TOOL of Wollongong ABSTRACT: The rapid adoption rate of mobile phones coupled with advancements in supporting technologies suggests mobile phones may now be a viable tool for classroom use. In this paper we introduce

Rubinstein, Benjamin

69

Coupling age-structured stock assessment and fish bioenergetics models: a system of time-varying models for quantifying piscivory patterns during the rapid trophic shift in the main basin of Lake Huron  

USGS Publications Warehouse

We quantified piscivory patterns in the main basin of Lake Huron during 1984–2010 and found that the biomass transfer from prey fish to piscivores remained consistently high despite the rapid major trophic shift in the food webs. We coupled age-structured stock assessment models and fish bioenergetics models for lake trout (Salvelinus namaycush), Chinook salmon (Oncorhynchus tshawytscha), walleye (Sander vitreus), and lake whitefish (Coregonus clupeaformis). The model system also included time-varying parameters or variables of growth, length–mass relations, maturity schedules, energy density, and diets. These time-varying models reflected the dynamic connections that a fish cohort responded to year-to-year ecosystem changes at different ages and body sizes. We found that the ratio of annual predation by lake trout, Chinook salmon, and walleye combined with the biomass indices of age-1 and older alewives (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax) increased more than tenfold during 1987–2010, and such increases in predation pressure were structured by relatively stable biomass of the three piscivores and stepwise declines in the biomass of alewives and rainbow smelt. The piscivore stability was supported by the use of alternative energy pathways and changes in relative composition of the three piscivores. In addition, lake whitefish became a new piscivore by feeding on round goby (Neogobius melanostomus). Their total fish consumption rivaled that of the other piscivores combined, although fish were still a modest proportion of their diet. Overall, the use of alternative energy pathways by piscivores allowed the increases in predation pressure on dominant diet species.

He, Ji X.; Bence, James R.; Madenjian, Charles P.; Pothoven, Steven A.; Dobiesz, Norine E.; Fielder, David G.; Johnson, James E.; Ebener, Mark P.; Cottrill, Adam R.; Mohr, Lloyd C.; Koproski, Scott R.

2015-01-01

70

Time-Varying Quantiles  

E-print Network

¤erence between Q (:05) and the median, Q (:5), may be slowly changing, or even time invariant, even though the individual quantiles are changing rapidly. How do the q0s vary with #28;? The Monte Carlo experiments reported below are designed to throw some light... size, results in an estimator that is very close to these infeasible estimators. Table 2 illustrates a Monte Carlo experiment with the same design as in table 1 except that the sample size increased from 100 to 500. It is reas- suring that the median...

Harvey, Andrew C; De Rossi, Giuliano

71

Basis expansion models and diversity techniques for blind identification and equalization of time-varying channels  

Microsoft Academic Search

The time-varying impulse response of rapidly fading mobile communication channels is expanded over a basis of complex exponentials that arise due to Doppler effects encountered with multipath propagation. Blind methods are reviewed for estimating the bases' parameters and the model orders. Existing second-order methods are critiqued and novel algorithms are developed for blind identification, direct, zero-forcing equalization and minimum mean

GEORGIOS B. GIANNAKIS; C. Tepedelenlioglu

1998-01-01

72

Rapid design space exploration of heterogeneous embedded systems using symbolic search and multi-granular simulation  

Microsoft Academic Search

In addition to integrating different Intellectual Property cores, heterogeneous embedded systems provide several architecture knobs such as voltage, operating frequency, configuration, etc. that can be varied to optimize performance. Such flexibilities results in a large design space making system optimization a very challenging task. Moreover, such systems operate in mobile and other power constrained environments. Therefore, in addition to rapid

Sumit Mohanty; Viktor K. Prasanna; Sandeep Neema; James R. Davis

2002-01-01

73

Sound Art \\/ Mobile Art  

Microsoft Academic Search

This paper examines the role of sound installation and music composition practices in addressing the relationship between sound and telecommunications devices, in this case the mobile phone. The popularity of mobile phone artworks is rapidly increasing, with handsets readily available, artists excited about sponsorship opportunities, and the general push in electronic arts. This paper focuses primarily on work by Perth

Cat Hope

2005-01-01

74

Mobile Applications for Extension  

ERIC Educational Resources Information Center

Mobile computing devices (smart phones, tablets, etc.) are rapidly becoming the dominant means of communication worldwide and are increasingly being used for scientific investigation. This technology can further our Extension mission by increasing our power for data collection, information dissemination, and informed decision-making. Mobile

Drill, Sabrina L.

2012-01-01

75

Mobile Goes Mainstream  

ERIC Educational Resources Information Center

Mobile learning--the use of mobile devices for educational purposes by students--is rapidly moving from an experimental initiative by a few innovative districts over the last five years to a broadly accepted concept in K12. The latest research and surveys, results of pilot programs, and analysis of trends in both public education and the broader…

Eisele-Dyrli, Kurt

2011-01-01

76

MOBILE SENSING 1 MOBILE SENSING  

E-print Network

MOBILE SENSING 1 MOBILE SENSING ! ! Parham Aarabi #12;MOBILE SENSING 2 20 years of sensing research #12;MOBILE SENSING 3 Low Likelihood High Likelihood #12;MOBILE SENSING 4 Image Courtesy of Apple Inc. #12;MOBILE SENSING 5 What can we do with all the sensors on our mobile devices? #12;MOBILE SENSING 6

Prodiæ, Aleksandar

77

Time Varying Feature Data  

NASA Astrophysics Data System (ADS)

The infrastructure to gather, store and access information about our environment is improving and growing rapidly. The increasing amount of information allows us to get a better understanding of the current state of our environment, historical processes and to simulate and predict the future state of the environment. Finer grained spatial and temporal data and more reliable communications make it easier to model dynamic states and ephemeral features. The exchange of information within and across geospatial domains is facilitated through the use of harmonized information models. The Observations & Measurements (O&M) developed through OGC and standardised by ISO is an example of such a cross-domain information model. It is used in many domains, including meteorology, hydrology as well as the emergency management. O&M enables harmonized representation of common metadata that belong to the act of determining the state of a feature property, whether by sensors, simulations or humans. In addition to the resulting feature property value, information such as the result quality but especially the time that the result applies to the feature property can be represented. Temporal metadata is critical to modelling past and future states of a feature. The features, and the semantics of each property, are defined in domain specific Application Schema using the General Feature Model (GFM) from ISO 19109 and usually encoded following ISO 19136. However, at the moment these standards provide only limited support for the representation and handling of time varying feature data. Features like rivers, wildfires or gas plumes have a defined state - for example geographic extent - at any given point in time. To keep track of changes, a more complex model for example using time-series coverages is required. Furthermore, the representation and management of feature property value changes via the service interfaces defined by OGC and ISO - namely: WFS and WCS - would be rather complex. Keeping track of feature property value corrections or even feature (state change) cancellations for auditing purposes is also not easy to achieve. The aviation domain has strong requirements to represent and manage the state of aeronautical features through time. Being able to efficiently encode and manage feature state changes, keeping track of all changes for auditing purposes and being able to determine the future state of an aeronautical feature as currently known to the system are vital for aeronautical applications. In order to support these requirements, the Aeronautical Information Exchange Model (AIXM) which has been developed by the aviation domain is based on the so called AIXM Temporality Model (AIXM-TM). The AIXM-TM defines various rules for modeling, representing and handling the state of aeronautical features through time. This is a promising approach that can be incorporated into the GFM so that ultimately the modeling and management of time varying feature data is supported in an interoperable and harmonized way in all geospatial domains. This presentation gives an introduction to the main concepts of the AIXM-TM. It also shows how the GFM can be extended to support time varying feature data. Finally, the relationship of O&M and time varying features is discussed.

Echterhoff, J.; Simonis, I.; Atkinson, R.

2012-04-01

78

Mobile Ambients  

Microsoft Academic Search

There are two distinct areas of work in mobility: mobile computing, concerning computation that is carried out in mobile devices (laptops, personal digital assistants, etc.), and mobile computation, concerning mobile code that moves between devices (applets, agents, etc.). We aim to describe all these aspects of mobility within a single framework that encompasses mobile agents, the ambients where agents interact

Luca Cardelli; Andrew D. Gordon

1998-01-01

79

On-site rapid detection of trace non-volatile inorganic explosives by stand-alone ion mobility spectrometry via acid-enhanced evaporization.  

PubMed

New techniques for the field detection of inorganic improvised explosive devices (IEDs) are urgently developed. Although ion mobility spectrometry (IMS) has been proved to be the most effective method for screening organic explosives, it still faces a major challenge to detect inorganic explosives owing to their low volatilities. Herein, we proposed a strategy for detecting trace inorganic explosives by thermal desorption ion mobility spectrometry (TD-IMS) with sample-to-sample analysis time less than 5 s based on in-situ acidification on the sampling swabs. The responses for typical oxidizers in inorganic explosives, such as KNO3, KClO3 and KClO4 were at least enhanced by a factor of 3000 and their limits of detection were found to be subnanogram. The common organic explosives and their mixtures with inorganic oxidizers were detected, indicating that the acidification process did not affect the detection of organic explosives. Moreover, the typical inorganic explosives such as black powders, firecrackers and match head could be sensitively detected as well. These results demonstrated that this method could be easily employed in the current deployed IMS for on-site sensitive detection of either inorganic explosives or organic ones. PMID:25318960

Peng, Liying; Hua, Lei; Wang, Weiguo; Zhou, Qinghua; Li, Haiyang

2014-01-01

80

On-site Rapid Detection of Trace Non-volatile Inorganic Explosives by Stand-alone Ion Mobility Spectrometry via Acid-enhanced Evaporization  

NASA Astrophysics Data System (ADS)

New techniques for the field detection of inorganic improvised explosive devices (IEDs) are urgently developed. Although ion mobility spectrometry (IMS) has been proved to be the most effective method for screening organic explosives, it still faces a major challenge to detect inorganic explosives owing to their low volatilities. Herein, we proposed a strategy for detecting trace inorganic explosives by thermal desorption ion mobility spectrometry (TD-IMS) with sample-to-sample analysis time less than 5 s based on in-situ acidification on the sampling swabs. The responses for typical oxidizers in inorganic explosives, such as KNO3, KClO3 and KClO4 were at least enhanced by a factor of 3000 and their limits of detection were found to be subnanogram. The common organic explosives and their mixtures with inorganic oxidizers were detected, indicating that the acidification process did not affect the detection of organic explosives. Moreover, the typical inorganic explosives such as black powders, firecrackers and match head could be sensitively detected as well. These results demonstrated that this method could be easily employed in the current deployed IMS for on-site sensitive detection of either inorganic explosives or organic ones.

Peng, Liying; Hua, Lei; Wang, Weiguo; Zhou, Qinghua; Li, Haiyang

2014-10-01

81

Supporting Distance Users of Mobile Learning Technology  

Microsoft Academic Search

With a rapid deployment of mobile devices, mobile learning gives rise to new possibilities for extending learning opportunities to all social-economic levels. Nevertheless, current research on mobile learning has mostly been aimed at enhancing learning of school or college students. In this light, the paper seeks to throw light on the potential of mobile learning for distance learner communities, including

Yong Liu; Hongxiu Li

2008-01-01

82

Mobile trough genesis over the Mongolian Plateau  

E-print Network

The purpose of this study is to understand the mechanisms responsible for formation of mobile troughs over the large source region in Mongolia. Three winter season mobile troughs which intensified rapidly after formation were analyzed. An objective...

McEver, Gregory David

2012-06-07

83

A QoS-aware system for mobile cloud computing  

Microsoft Academic Search

With the rapid growth of mobile smart phone users, more and more mobile users are using mobile phones to access Internet services. Meanwhile, cloud computing is changing the landscape of Internet services, so as to affect the mobile services. Cloud computing is regarded as the future of mobile. However, cloud computing still faces a number of challenges, one of which

Peng Zhang; Zheng Yan

2011-01-01

84

Varying constants quantum cosmology  

NASA Astrophysics Data System (ADS)

We discuss minisuperspace models within the framework of varying physical constants theories including ?-term. In particular, we consider the varying speed of light (VSL) theory and varying gravitational constant theory (VG) using the specific ansätze for the variability of constants: c(a) = c0 an and G(a)=G0 aq. We find that most of the varying c and G minisuperspace potentials are of the tunneling type which allows to use WKB approximation of quantum mechanics. Using this method we show that the probability of tunneling of the universe ``from nothing'' (a=0) to a Friedmann geometry with the scale factor at is large for growing c models and is strongly suppressed for diminishing c models. As for G varying, the probability of tunneling is large for G diminishing, while it is small for G increasing. In general, both varying c and G change the probability of tunneling in comparison to the standard matter content (cosmological term, dust, radiation) universe models.

Leszczy?ska, Katarzyna; Balcerzak, Adam; Dabrowski, Mariusz P.

2015-02-01

85

The emergence and role of strong ties in time-varying communication networks  

E-print Network

In most social, information, and collaboration systems the complex activity of agents generates rapidly evolving time-varying networks. Temporal changes in the network structure and the dynamical processes occurring on its fabric are usually coupled in ways that still challenge our mathematical or computational modelling. Here we analyse a mobile call dataset describing the activity of millions of individuals and investigate the temporal evolution of their egocentric networks. We empirically observe a simple statistical law characterizing the memory of agents that quantitatively signals how much interactions are more likely to happen again on already established connections. We encode the observed dynamics in a reinforcement process defining a generative computational network model with time-varying connectivity patterns. This activity-driven network model spontaneously generates the basic dynamic process for the differentiation between strong and weak ties. The model is used to study the effect of time-varyi...

Karsai, Márton; Vespignani, Alessandro

2014-01-01

86

Misbehavior in Mobile Application Markets  

Microsoft Academic Search

Mobile application markets facilitate the distribution of applications and thus help developers advertise their work and customers find useful applications. In addition, the operators of mobile application markets can control the quality and the content of the applications. These markets are growing rapidly with more than 300'000 application in the App Store of Apple and more than 100'000 in the

Steven Meyer

2011-01-01

87

Mobile Multicast in Hierarchical Proxy Mobile IPV6  

NASA Astrophysics Data System (ADS)

Mobile Internet Protocol Version 6 (MIPv6) environments have been developing very rapidly. Many challenges arise with the fast progress of MIPv6 technologies and its environment. Therefore the importance of improving the existing architecture and operations increases. One of the many challenges which need to be addressed is the need for performance improvement to support mobile multicast. Numerous approaches have been proposed to improve mobile multicast performance. This includes Context Transfer Protocol (CXTP), Hierarchical Mobile IPv6 (HMIPv6), Fast Mobile IPv6 (FMIPv6) and Proxy Mobile IPv6 (PMIPv6). This document describes multicast context transfer in hierarchical proxy mobile IPv6 (H-PMIPv6) to provide better multicasting performance in PMIPv6 domain.

Hafizah Mohd Aman, Azana; Hashim, Aisha Hassan A.; Mustafa, Amin; Abdullah, Khaizuran

2013-12-01

88

Mobile robots  

Microsoft Academic Search

This book presents papers given at a conference on mobile robots. Topics the conference included are the following: mobility systems for robotic vehicles; detection and control of mobile robot motion by real-time computer vision, obstacle avoidance algorithms for an autonomous land vehicle; hierarchical processor and matched filters for range image processing; asynchronous distributed control system for a mobile robot, and,

W. J. Wolfe; N. Marquina

1986-01-01

89

Emerging security threats for mobile platforms  

Microsoft Academic Search

The proliferation of smart-phone devices, with ever advancing technological features, has brought the issue of mobile device security back into focus. Mobile devices are rapidly becoming attractive targets for malicious attacks due to significant advances in both hardware and operating systems. The modern mobile platforms, like Android, iOS and Symbian, increasingly resemble traditional operating systems for PCs. Therefore, the challenges

G. Delac; M. Silic; J. Krolo

2011-01-01

90

ECG RR Peak Detection on Mobile Phones  

Microsoft Academic Search

Mobile phones have become an integral part of modern life. Due to the ever increasing processing power, mobile phones are rapidly expanding its arena from a sole device of telecommunication to organizer, calculator, gaming device, web browser, music player, audio\\/video recording device, navigator etc. The processing power of modern mobile phones has been utilized by many innovative purposes. In this

F. Sufi; Q. Fang; I. Cosic

2010-01-01

91

ECG RR Peak Detection on Mobile Phones  

Microsoft Academic Search

Mobile phones have become an integral part of modern life. Due to the ever increasing processing power, mobile phones are rapidly expanding its arena from a sole device of telecommunication to organizer, calculator, gaming device, web browser, music player, audio\\/video recording device, navigator etc. The processing power of modern mobile phones has been utilized by many innovative purposes. In this

F. Sufi; Q. Fang; I. Cosic

2007-01-01

92

Introduction: The Prospects for Mobile Learning  

ERIC Educational Resources Information Center

The issue that this article introduces grew out of an event, the UNESCO Mobile Learning Week, but also out of a wider and growing movement of people and organisations exploiting mobile technologies, as they pursue varied educational missions. The UNESCO Mobile Learning Week represented by contributions here was a focus for contributions from…

Traxler, John; Vosloo, Steve

2014-01-01

93

Biomolecule Analysis by Ion Mobility Spectrometry  

PubMed Central

Although nonnative protein conformations, including intermediates along the folding pathway and kinetically trapped misfolded species that disfavor the native state, are rarely isolated in the solution phase, they are often stable in the gas phase, where macromolecular ions from electrospray ionization can exist in varying charge states. Differences in the structures of nonnative conformations in the gas phase are often large enough to allow different shapes and charge states to be separated because of differences in their mobilities through a gas. Moreover, gentle collisional activation can be used to induce structural transformations. These new structures often have different mobilities. Thus, there is the possibility of developing a multidimensional separation that takes advantage of structural differences of multiple stable states. This review discusses how nonnative states differ in the gas phase compared with solution and presents an overview of early attempts to utilize and manipulate structures in order to develop ion mobility spectrometry as a rapid and sensitive technique for separating complex mixtures of biomolecules prior to mass spectrometry. PMID:20636082

Bohrer, Brian C.; Merenbloom, Samuel I.; Koeniger, Stormy L.; Hilderbrand, Amy E.; Clemmer, David E.

2013-01-01

94

Staying Mobile  

MedlinePLUS

... Mobile Staying Mobile In this article Effective symptom management Ongoing management of symptoms caused by MS is ... Finding the right shoes can make all the difference. Automobile adaptations When symptoms of MS such as ...

95

Mobile robots  

SciTech Connect

This book presents papers given at a conference on mobile robots. Topics the conference included are the following: mobility systems for robotic vehicles; detection and control of mobile robot motion by real-time computer vision, obstacle avoidance algorithms for an autonomous land vehicle; hierarchical processor and matched filters for range image processing; asynchronous distributed control system for a mobile robot, and, planning in a hierarchical nested autonomous control system.

Wolfe, W.J.; Marquina, N.

1986-01-01

96

The Move to Mobile: Where Is a Campus's Place in the Mobile Space?  

ERIC Educational Resources Information Center

At the end of 2010, for the first time ever, smartphones outsold PCs. Mobile device adoption rates continue to rise rapidly around the world. A recent forecast by Cisco found that global mobile data traffic more than doubled last year, and by the end of 2012, the number of mobile devices in use will outnumber the world's population. In the United…

Lum, Lydia

2012-01-01

97

Mobile advertising: The influence of emotional attachment to mobile devices on consumer receptiveness  

Microsoft Academic Search

Mobile advertising has grown rapidly over recent years, yet volume is not necessarily a good measure of consumer acceptance. Earlier studies have explored acceptance in terms of content; here we focus on the communication medium, the mobile device. Building upon Vincent's (2006) premise that emotional attachment to mobile phones is a likely key influence on future adoption of new services,

Ailsa Kolsaker; Nikolaos Drakatos

2009-01-01

98

Mobility Models for Mobility Management  

Microsoft Academic Search

\\u000a The main goals of today’s wireless mobile telecommunication systems are to provide both, mobility and ubiquity to mobile terminals\\u000a (MTs) with a required quality of service. By ubiquity we understand the ability of a MT to be connected to the network anytime,\\u000a anywhere, regardless of the access channel’s characteristics. In this chapter we deal with mobility aspects. We provide some

Vicente Casares Giner; Vicent Pla; Pablo Escalle-García

2011-01-01

99

Technology, Mobility, and Poverty Reduction  

Microsoft Academic Search

\\u000a Information and Communication Technologies have had undeniable effects on global mobility. They not only facilitate the international\\u000a mobility of goods, money, and people, they also enable the rapid, often instantaneous, transmission of thoughts, ideas, and\\u000a data across the world, rendering knowledge, information, and networking opportunities essentially borderless. Depending on\\u000a how they are cultivated and used, these trends can accelerate or

Lori Foster Thompson; Stephen G. Atkins

100

MetroTrack: Predictive Tracking of Mobile Events Using Mobile Phones  

NASA Astrophysics Data System (ADS)

We propose to use mobile phones carried by people in their everyday lives as mobile sensors to track mobile events. We argue that sensor-enabled mobile phones are best suited to deliver sensing services (e.g., tracking in urban areas) than more traditional solutions, such as static sensor networks, which are limited in scale, performance, and cost. There are a number of challenges in developing a mobile event tracking system using mobile phones. First, mobile sensors need to be tasked before sensing can begin, and only those mobile sensors near the target event should be tasked for the system to scale effectively. Second, there is no guarantee of a sufficient density of mobile sensors around any given event of interest because the mobility of people is uncontrolled. This results in time-varying sensor coverage and disruptive tracking of events, i.e., targets will be lost and must be efficiently recovered. To address these challenges, we propose MetroTrack, a mobile-event tracking system based on off-the-shelf mobile phones. MetroTrack is capable of tracking mobile targets through collaboration among local sensing devices that track and predict the future location of a target using a distributed Kalman-Consensus filtering algorithm. We present a proof-of-concept implementation of MetroTrack using Nokia N80 and N95 phones. Large scale simulation results indicate that MetroTrack prolongs the tracking duration in the presence of varying mobile sensor density.

Ahn, Gahng-Seop; Musolesi, Mirco; Lu, Hong; Olfati-Saber, Reza; Campbell, Andrew T.

101

Mobile Computing/Mobile Computing/Mobile Computing/Mobile Computing/ Mobile NetworksMobile NetworksMobile NetworksMobile Networks  

E-print Network

Mobile NetworksMobile Networks Mobile IP Prof. Chansu Yu 2 Contents IP for Wired Network Mobile IP Overview Basic Mobile IP Agent Discovery Registration Tunneling Route Optimization Current Topics #12;3 Simplified CDMA,... Mobile IP Mobile TCP 4 Simplified Reference Model... Location/context-sensitive services

Yu, Chansu

102

Niklas Grip and Gotz E. Pfander Time Varying Narrowband Communications  

E-print Network

.1 Mobile phone communications . . . . . . . . . . . . . . . . . . . . . 36 6.2 Satellite communicationsNiklas Grip and G¨otz E. Pfander Time Varying Narrowband Communications Channels: Analysis Communications Channels: Analysis and Implementation1 Niklas Grip Department of Mathematics Lule°a University

Pfander, Götz

103

MOBILE, MULTIMEDIA, AD HOC AND SENSOR NETWORKS  

E-print Network

MOBILE, MULTIMEDIA, AD HOC AND SENSOR NETWORKS Guest Editor Professor Min Chen School of Computer and computing. Along with the rapid development of hardware and embedded systems, ad hoc and sensor networks of mobile, multimedia, ad hoc and sensor networks. In response to the call for contributions, we have

Chen, Min

104

Mobile Guides for Locating Network Hotspots  

Microsoft Academic Search

Mobile guides research concerns guiding users in physical spaces and finding services from physical places. We have found in user studies that as mobile networks evolve to hotspot networks, there is a rapidly increasing need to locate a high-speed network, such as a public WLAN hotspot. Instead of creating a dedicated tool for locating network hotspots, we argue for the

Virpi Roto; Katri Laakso

105

Mobile IPMobile IP Mobile IPMobile IP  

E-print Network

Mobile IPMobile IP #12;2 Mobile IPMobile IP · How do we support mobile users whose point of attachment to the network changes dynamically? #12;3 Mobile IPMobile IP · The goal of Mobile IP is to allow connectivity automatically, despite the change. · While Mobile IP can work with wired connections, where you

Yeom, Ikjun

106

MobilityFirst: A Robust and Trustworthy Mobility-Centric  

E-print Network

services, georouting, ad hoc networks Important new trust (security and privacy) requirements), and protocol gateways (GGSN, PDN GW, etc.) Scalability, performance and security problems when bridging 2 A Radio Access B Radio Access C Mobility, Security Varying Access bW Heterogeneous radio #12;WINLAB Vision

107

Mobile cinema  

E-print Network

This thesis develops techniques and methods that extend the art and craft of storytelling, and in particular enable the creation of mobile cinema. Stories are always constrained by the medium in which they are told and the ...

Pan, Pengkai, 1972-

2004-01-01

108

A Discrete Model for the Efficient Analysis of Time-Varying Narrowband Communication  

E-print Network

, satellite communications, underwater sonar communications. The work on this project was supported.1 Mobile phone communications . . . . . . . . . . . . . . . . . . . . . . 32 6.2 Satellite communicationsA Discrete Model for the Efficient Analysis of Time-Varying Narrowband Communication Channels

Pfander, Götz

109

Mobility Patterns  

Microsoft Academic Search

We present a data model for tracking mobile objects and reporting the result of queries. The model relies on a discrete view of the spatio-temporal space, where the 2D space and the time axis are respectively partitioned in a finite set of user-defined areas and in constant-size intervals. We define a generic query language to retrieve objects that match mobility

Cédric Du Mouza; Philippe Rigaux

2005-01-01

110

The DIANAApproach to Mobile Computing  

E-print Network

and varied communication patterns. Our architecture achieves display and network independence by de­ coupling the user interface logic and communication logic from the processing logic of each application. Such separation allows applications to operate in the workplace as well as in a mobile environment in which

Keller, Arthur M.

111

Transnational Academic Mobility and Gender  

ERIC Educational Resources Information Center

This paper examines to what extent the participation of researchers in transnational academic mobility, their experiences and perceived outcomes vary by gender. Based on longitudinal statistics, original survey data and semi-structured interviews with former visiting researchers in Germany, the paper shows that the academic world of female…

Jons, Heike

2011-01-01

112

Epidemic spreading in time-varying community networks  

NASA Astrophysics Data System (ADS)

The spreading processes of many infectious diseases have comparable time scale as the network evolution. Here, we present a simple networks model with time-varying community structure, and investigate susceptible-infected-susceptible epidemic spreading processes in this model. By both theoretic analysis and numerical simulations, we show that the efficiency of epidemic spreading in this model depends intensively on the mobility rate q of the individuals among communities. We also find that there exists a mobility rate threshold qc. The epidemic will survive when q > qc and die when q < qc. These results can help understanding the impacts of human travel on the epidemic spreading in complex networks with community structure.

Ren, Guangming; Wang, Xingyuan

2014-06-01

113

Mobile phones and sleep - A review  

NASA Astrophysics Data System (ADS)

The increasing use of mobile phones has raised concerns regarding the potential health effects of exposure to the radiofrequency electromagnetic fields. An increasing amount research related to mobile phone use has focussed on the possible effects of mobile phone exposure on human brain activity and function. In particular, the use of sleep research has become a more widely used technique for assessing the possible effects of mobile phones on human health and wellbeing especially in the investigation of potential changes in sleep architecture resulting from mobile phone use. Acute exposure to a mobile phone prior to sleep significantly enhances electroencephalogram spectral power in the sleep spindle frequency range. This mobile phone-induced enhancement in spectral power is largely transitory and does not linger throughout the night. Furthermore, a reduction in rapid eye movement sleep latency following mobile phone exposure was also found, although interestingly, neither this change in rapid eye movement sleep latency or the enhancement in spectral power following mobile phone exposure, led to changes in the overall quality of sleep. In conclusion, a short exposure to the radiofrequency electromagnetic fields emitted by a mobile phone handset immediately prior to sleep is sufficient to induce changes in brain activity in the initial part of sleep. The consequences or functional significance of this effect are currently unknown and it would be premature to draw conclusions about possible health consequences.

Supe, Sanjay S.

2010-01-01

114

INTRODUCTION TO CLOUDY MOBILE APP DEVELOPMENT Ron Coleman  

E-print Network

INTRODUCTION TO CLOUDY MOBILE APP DEVELOPMENT Ron Coleman School of Computer Science, explores the history of mobile computing and clouds, and considers apps in the cloud, getting hands-on experience with rapid prototyping and development of "cloudy" mobile apps using state-of-the-art technologies

Coleman, Ron

115

Fast App Launching for Mobile Devices Using Predictive User Context  

E-print Network

Fast App Launching for Mobile Devices Using Predictive User Context Tingxin Yan1 , David Chu2 {yan, ganesan}@cs.umass.edu, {davidchu, kansal, jie.liu}@microsoft.com ABSTRACT As mobile apps become more closely integrated into our everyday lives, mobile app interactions ought to be rapid

Ganesan, Deepak

116

Firewall for Dynamic IP Address in Mobile IPv6  

NASA Astrophysics Data System (ADS)

Mobile communication is becoming the mainstream with the rapid growth of mobile devices penetrating our daily life. More and more mobile devices such as mobile phones, personal digital assistants, notebooks etc, are capable of Internet access. Mobile devices frequently change their communication IP addresses in mobile IPv6 network following its current attached domain. This raises a big challenge for building firewall for mobile devices. The conventional firewalls are primarily based on IPv4 networks where the security criteria are specified only to the fixed IP addresses or subnets, which apparently do not apply to mobile IPv6. In this paper we propose three solutions for mobile IPv6 firewall. Our approaches make the firewall adaptive to dynamic IP addresses in mobile IPv6 network. They have different expense and weight corresponding to different degree of universality. The paper focuses the study more from practical aspect.

Qiu, Ying; Bao, Feng; Zhou, Jianying

117

Strategic analysis of mobile viral marketing through a holistic study in technological evolution of mobile devices  

E-print Network

Rapid advancement in Electronic Communication gives rise to the popularity of Viral Marketing. Mobile Communication, in particular, offers greater potential in the utilization of this Word-of-Mouth phenomenon as a Marketing ...

Surya, Yulia

2009-01-01

118

SVM-Based Spectrum Mobility Prediction Scheme in Mobile Cognitive Radio Networks  

PubMed Central

Spectrum mobility as an essential issue has not been fully investigated in mobile cognitive radio networks (CRNs). In this paper, a novel support vector machine based spectrum mobility prediction (SVM-SMP) scheme is presented considering time-varying and space-varying characteristics simultaneously in mobile CRNs. The mobility of cognitive users (CUs) and the working activities of primary users (PUs) are analyzed in theory. And a joint feature vector extraction (JFVE) method is proposed based on the theoretical analysis. Then spectrum mobility prediction is executed through the classification of SVM with a fast convergence speed. Numerical results validate that SVM-SMP gains better short-time prediction accuracy rate and miss prediction rate performance than the two algorithms just depending on the location and speed information. Additionally, a rational parameter design can remedy the prediction performance degradation caused by high speed SUs with strong randomness movements. PMID:25143975

Zhang, Zhongzhao; Ma, Lin; Chen, Jiamei

2014-01-01

119

Mobile Learning and Mobility in Teacher Training  

Microsoft Academic Search

This article describes the mobile learning project, where a mobile device is used for educational activities. The article defines the word mobility from the educational point of view. The main perspective in this article is in teacher training. We present experiences of how mobile technology was used in teacher training, how trainees and supervising teachers felt the use of mobile

Pauliina Seppälä; Harri Alamäki

2002-01-01

120

Rapid Prototyping  

NASA Technical Reports Server (NTRS)

Javelin, a Lone Peak Engineering Inc. Company has introduced the SteamRoller(TM) System as a commercial product. The system was designed by Javelin during a Phase II NASA funded small commercial product. The purpose of the invention was to allow automated-feed of flexible ceramic tapes to the Laminated Object Manufacturing rapid prototyping equipment. The ceramic material that Javelin was working with during the Phase II project is silicon nitride. This engineered ceramic material is of interest for space-based component.

1999-01-01

121

Topobathymetric model of Mobile Bay, Alabama  

USGS Publications Warehouse

Topobathymetric Digital Elevation Models (DEMs) are a merged rendering of both topography (land elevation) and bathymetry (water depth) that provides a seamless elevation product useful for inundation mapping, as well as for other earth science applications, such as the development of sediment-transport, sea-level rise, and storm-surge models. This 1/9-arc-second (approximately 3 meters) resolution model of Mobile Bay, Alabama was developed using multiple topographic and bathymetric datasets, collected on different dates. The topographic data were obtained primarily from the U.S. Geological Survey (USGS) National Elevation Dataset (NED) (http://ned.usgs.gov/) at 1/9-arc-second resolution; USGS Experimental Advanced Airborne Research Lidar (EAARL) data (2 meters) (http://pubs.usgs.gov/ds/400/); and topographic lidar data (2 meters) and Compact Hydrographic Airborne Rapid Total Survey (CHARTS) lidar data (2 meters) from the U.S. Army Corps of Engineers (USACE) (http://www.csc.noaa.gov/digitalcoast/data/coastallidar/). Bathymetry was derived from digital soundings obtained from the National Oceanic and Atmospheric Administration’s (NOAA) National Geophysical Data Center (NGDC) (http://www.ngdc.noaa.gov/mgg/geodas/geodas.html) and from water-penetrating lidar sources, such as EAARL and CHARTS. Mobile Bay is ecologically important as it is the fourth largest estuary in the United States. The Mobile and Tensaw Rivers drain into the bay at the northern end with the bay emptying into the Gulf of Mexico at the southern end. Dauphin Island (a barrier island) and the Fort Morgan Peninsula form the mouth of Mobile Bay. Mobile Bay is 31 miles (50 kilometers) long by a maximum width of 24 miles (39 kilometers) with a total area of 413 square miles (1,070 square kilometers). The vertical datum of the Mobile Bay topobathymetric model is the North American Vertical Datum of 1988 (NAVD 88). All the topographic datasets were originally referenced to NAVD 88 and no transformations were made to these input data. The NGDC hydrographic, multibeam, and trackline surveys were transformed from mean low water (MLW) or mean lower low water (MLLW) to NAVD 88 using VDatum (http://vdatum.noaa.gov). VDatum is a tool developed by the National Geodetic Survey (NGS) that performs transformations among tidal, ellipsoid-based, geoid-based, and orthometric datums using calibrated hydrodynamic models. The vertical accuracy of the input topographic data varied depending on the input source. Because the input elevation data were derived primarily from lidar, the vertical accuracy ranges from 6 to 20 centimeters in root mean square error (RMSE). he horizontal datum of the Mobile Bay topobathymetric model is the North American Datum of 1983 (NAD 83), geographic coordinates. All the topographic and bathymetric datasets were originally referenced to NAD 83, and no transformations were made to the input data. The bathymetric surveys were downloaded referenced to NAD 83 geographic, and therefore no horizontal transformations were required. The topbathymetric model of Mobile Bay and detailed metadata can be obtained from the USGS Web sites: http://nationalmap.gov/.

Danielson, Jeffrey J.; Brock, John C.; Howard, Daniel M.; Gesch, Dean B.; Bonisteel-Cormier, Jamie M.; Travers, Laurinda J.

2013-01-01

122

Network mobilizer  

Microsoft Academic Search

Purpose – The aim of this paper is to identify how companies mobilize other companies in their surrounding network to work within the plans they develop. Design\\/methodology\\/approach – A conceptual model is developed and its applicability is illustrated by a case study involving a manufacturer-retailer network within Europe. Findings – The study identifies five different challenges that managers need to

Stefanos Mouzas; Pete Naudé

2007-01-01

123

Atomic Mobile  

NSDL National Science Digital Library

Learners make a mobile model of a carbon atom using clay, wire, and pipe cleaners. Learners will use the periodic table as a guide and explore how atoms are made up of a nucleus of protons and neutrons with orbiting electrons. The activity includes a PDF file of a periodic table and a guide for reading it.

History, American M.

2012-06-26

124

Determinants of Mobile Learning Acceptance: An Empirical Investigation in Higher Education  

ERIC Educational Resources Information Center

Scope and method of study: The purpose of this study was to investigate the determinants of mobile learning acceptance in higher education. Mobile learning is a rapidly growing method of learning that utilizes mobile devices to deliver content. Acceptance of mobile learning theory was derived from technology acceptance theories. The study…

Akour, Hassan

2010-01-01

125

Rapid Airplane Parametric Input Design (RAPID)  

NASA Technical Reports Server (NTRS)

RAPID is a methodology and software system to define a class of airplane configurations and directly evaluate surface grids, volume grids, and grid sensitivity on and about the configurations. A distinguishing characteristic which separates RAPID from other airplane surface modellers is that the output grids and grid sensitivity are directly applicable in CFD analysis. A small set of design parameters and grid control parameters govern the process which is incorporated into interactive software for 'real time' visual analysis and into batch software for the application of optimization technology. The computed surface grids and volume grids are suitable for a wide range of Computational Fluid Dynamics (CFD) simulation. The general airplane configuration has wing, fuselage, horizontal tail, and vertical tail components. The double-delta wing and tail components are manifested by solving a fourth order partial differential equation (PDE) subject to Dirichlet and Neumann boundary conditions. The design parameters are incorporated into the boundary conditions and therefore govern the shapes of the surfaces. The PDE solution yields a smooth transition between boundaries. Surface grids suitable for CFD calculation are created by establishing an H-type topology about the configuration and incorporating grid spacing functions in the PDE equation for the lifting components and the fuselage definition equations. User specified grid parameters govern the location and degree of grid concentration. A two-block volume grid about a configuration is calculated using the Control Point Form (CPF) technique. The interactive software, which runs on Silicon Graphics IRIS workstations, allows design parameters to be continuously varied and the resulting surface grid to be observed in real time. The batch software computes both the surface and volume grids and also computes the sensitivity of the output grid with respect to the input design parameters by applying the precompiler tool ADIFOR to the grid generation program. The output of ADIFOR is a new source code containing the old code plus expressions for derivatives of specified dependent variables (grid coordinates) with respect to specified independent variables (design parameters). The RAPID methodology and software provide a means of rapidly defining numerical prototypes, grids, and grid sensitivity of a class of airplane configurations. This technology and software is highly useful for CFD research for preliminary design and optimization processes.

Smith, Robert E.

1995-01-01

126

Quality of Service (QoS) security in mobile ad hoc networks  

E-print Network

With the rapid proliferation of wireless networks and mobile computing applications, Quality of Service (QoS) for mobile ad hoc networks (MANETs) has received increased attention. Security is a critical aspect of QoS provisioning in the MANET...

Lu, Bin

2006-10-30

127

Platform leadership through system interfaces : a study of application programming interfaces for mobile operating systems  

E-print Network

The Smart Mobile device industry is witnessing rapid growth with the increased convergence of voice-centric mobile phones and data-centric personal digital assistant systems. Improving capabilities in device hardware have ...

Mandala, Ashok Chakravarthy

2007-01-01

128

Mobility patterns  

Microsoft Academic Search

Abstract We present a data model for tracking mobile objects and reporting the result of continuous queries. The model relies on a discrete view of the spatio-temporal space, where the 2D space and the time axis are respectively partitioned in a nite set of user-dened areas and in constant-size intervals. We dene a query language to retrieve objects that match

Cédric Du Mouza; Philippe Rigaux

2004-01-01

129

Going mobile  

NASA Astrophysics Data System (ADS)

By 1990, all metropolitan areas in the U.S. and rural areas close to major cities or towns are expected to have cellular telephone service; 22 Canadian cities also feature cellular service. To supply mobile telecommunication services to sparsely-populated rural areas, a mobile satellite service (MSS) is now being developed. In this paper the projected possibilities of the MSS system are discussed, including a possibility that a piggyback-MSS payload be added to the GSTAR-4 satellite which is scheduled for a launch in 1988 or 1989; one in which some of the hardware from aborted direct-broadcast satellites would be used; and the possibility of building a new MSS satellite with large servicing capacity. Canada is planning to launch its own mobile satellite, MSAT, in the early 1990s. The MSS is expected to be 'generic', serving not only people on land but maritime and aeronautical users as well. It will also offer major benefits to truck and automobile drivers, making it possible for them to conduct business or to call for assistance from locations beyond the range of cellular systems.

Brus, Eric

1987-12-01

130

Viability of Modern Automated Rapid Transit Applications  

E-print Network

to Personal Rapid Transit (PRT) Primary Features of ART: · Automation · Fast service · Transit advantage Comprehensive Mobility #12;Current and Planned ART/PRT Systems Heathrow Airport ULTra PRT (UK) · Initial stage/hour) #12;Current and Planned ART/PRT Systems Masdar City, Abu Dhabi, 2getthere System (Dutch) · Initial

Minnesota, University of

131

Varying-? and K-essence  

NASA Astrophysics Data System (ADS)

We introduce a model which allows the fine structure constant (?) to vary throughout space and time due to a coupling to a scalar field with a non-canonical kinetic structure. This provided a new extension of the Bekenstein-Sandvik-Barrow-Magueijo model of ? variations. The background cosmology is studied in detail using dynamical systems techniques for a scalar field of ghost condensate type. We show generically that if the kinetic terms are chosen to allow an accelerated late-time attractor for the expansion scale factor then ? will not asymptote to a constant at late times.

Graham, Alexander A. H.

2015-01-01

132

33 CFR 165.835 - Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL.  

Code of Federal Regulations, 2012 CFR

...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. 165.835 Section...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. (a) Definition. As used in this section— Cruise ship means a passenger vessel...

2012-07-01

133

33 CFR 165.835 - Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL.  

...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. 165.835 Section...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. (a) Definition. As used in this section— Cruise ship means a passenger vessel...

2014-07-01

134

33 CFR 165.835 - Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL.  

Code of Federal Regulations, 2010 CFR

...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. 165.835 Section...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. (a) Definition. As used in this section— Cruise ship means a passenger vessel...

2010-07-01

135

33 CFR 165.835 - Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL.  

Code of Federal Regulations, 2011 CFR

...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. 165.835 Section...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. (a) Definition. As used in this section— Cruise ship means a passenger vessel...

2011-07-01

136

33 CFR 165.835 - Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL.  

Code of Federal Regulations, 2013 CFR

...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. 165.835 Section...Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. (a) Definition. As used in this section— Cruise ship means a passenger vessel...

2013-07-01

137

Continuously Connected With Mobile IP  

NASA Technical Reports Server (NTRS)

Cisco Systems developed Cisco Mobile Networks, making IP devices mobile. With this innovation, a Cisco router and its connected IP devices can roam across network boundaries and connection types. Because a mobile user is able to keep the same IP address while roaming, a live IP connection can be maintained without interruption. Glenn Research Center jointly tested the technology with Cisco, and is working to use it on low-earth-orbiting research craft. With Cisco's Mobile Networks functionality now available in Cisco IOS Software release 12.2(4)T, the commercial advantages and benefits are numerous. The technology can be applied to public safety, military/homeland security, emergency management services, railroad and shipping systems, and the automotive industry. It will allow ambulances, police, firemen, and the U.S. Coast Guard to stay connected to their networks while on the move. In the wireless battlefield, the technology will provide rapid infrastructure deployment for U.S. national defense. Airline, train, and cruise passengers utilizing Cisco Mobile Networks can fly all around the world with a continuous Internet connection. Cisco IOS(R) Software is a registered trademark of Cisco Systems.

2002-01-01

138

Device Data Protection in Mobile Healthcare Applications  

NASA Astrophysics Data System (ADS)

The rapid growth in mobile technology makes the delivery of healthcare data and services on mobile phones a reality. However, the healthcare data is very sensitive and has to be protected against unauthorized access. While most of the development work on security of mobile healthcare today focuses on the data encryption and secure authentication in remote servers, protection of data on the mobile device itself has gained very little attention. This paper analyses the requirements and the architecture for a secure mobile capsule, specially designed to protect the data that is already on the device. The capsule is a downloadable software agent with additional functionalities to enable secure external communication with healthcare service providers, network operators and other relevant communication parties.

Weerasinghe, Dasun; Rajarajan, Muttukrishnan; Rakocevic, Veselin

139

Note: Integration of trapped ion mobility spectrometry with mass spectrometry.  

PubMed

The integration of a trapped ion mobility spectrometer (TIMS) with a mass spectrometer (MS) for complementary fast, gas-phase mobility separation prior to mass analysis (TIMS-MS) is described. The ion transmission and mobility separation are discussed as a function of the ion source condition, bath gas velocity, analysis scan speed, RF ion confinement, and downstream ion optical conditions. TIMS mobility resolution depends on the analysis scan speed and the bath gas velocity, with the unique advantage that the IMS separation can be easily tuned from high speed (~25 ms) for rapid analysis to slower scans for higher mobility resolution (R > 80). PMID:22225261

Fernandez-Lima, F A; Kaplan, D A; Park, M A

2011-12-01

140

Situational Effects on the Usage Intention of Mobile Games  

NASA Astrophysics Data System (ADS)

As value-added services on mobile devices are developing rapidly, text messaging, multi-media messaging, music, video, games, GPS navigation, RFID, and mobile TV are all accessible from a single device. Mobile games that combine mobile communication with computer games are an emerging industry. The purpose of this research is to explore what situation factors may affect the intention to play mobile game. We propose a research model to fit the nature of mobile games and conducted an online survey to examine the effect of situational factors. The model integrates constructs in TAM and TRA. The findings are as follows. First, Subjective norm affects a user’s intention in using mobile games when a user has no other task. Second, perceived playfulness affects a user’s intention to use mobile games when the user has another task.

Liang, Ting-Peng; Yeh, Yi-Hsuan

141

Epidemic spreading in time-varying community networks  

SciTech Connect

The spreading processes of many infectious diseases have comparable time scale as the network evolution. Here, we present a simple networks model with time-varying community structure, and investigate susceptible-infected-susceptible epidemic spreading processes in this model. By both theoretic analysis and numerical simulations, we show that the efficiency of epidemic spreading in this model depends intensively on the mobility rate q of the individuals among communities. We also find that there exists a mobility rate threshold q{sub c}. The epidemic will survive when q?>?q{sub c} and die when q?

Ren, Guangming, E-mail: wangxy@dlut.edu.cn, E-mail: ren-guang-ming@163.com [School of Electronic and Information, Guangdong Polytechnic Normal University, Guangzhou 510665 (China) [School of Electronic and Information, Guangdong Polytechnic Normal University, Guangzhou 510665 (China); Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024 (China); Wang, Xingyuan, E-mail: wangxy@dlut.edu.cn, E-mail: ren-guang-ming@163.com [Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024 (China)] [Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024 (China)

2014-06-15

142

Mobile Instruments Measure Atmospheric Pollutants  

NASA Technical Reports Server (NTRS)

As a part of NASA's active research of the Earth s atmosphere, which has included missions such as the Atmospheric Laboratory of Applications and Science (ATLAS, launched in 1992) and the Total Ozone Mapping Spectrometer (TOMS, launched on the Earth Probe satellite in 1996), the Agency also performs ground-based air pollution research. The ability to measure trace amounts of airborne pollutants precisely and quickly is important for determining natural patterns and human effects on global warming and air pollution, but until recent advances in field-grade spectroscopic instrumentation, this rapid, accurate data collection was limited and extremely difficult. In order to understand causes of climate change and airborne pollution, NASA has supported the development of compact, low power, rapid response instruments operating in the mid-infrared "molecular fingerprint" portion of the electromagnetic spectrum. These instruments, which measure atmospheric trace gases and airborne particles, can be deployed in mobile laboratories - customized ground vehicles, typically - to map distributions of pollutants in real time. The instruments must be rugged enough to operate rapidly and accurately, despite frequent jostling that can misalign, damage, or disconnect sensitive components. By measuring quickly while moving through an environment, a mobile laboratory can correlate data and geographic points, revealing patterns in the environment s pollutants. Rapid pollutant measurements also enable direct determination of pollutant sources and sinks (mechanisms that remove greenhouse gases and pollutants), providing information critical to understanding and managing atmospheric greenhouse gas and air pollutant concentrations.

2009-01-01

143

Ion mobility based on column leaching of South African gold tailings dam with chemometric evaluation.  

PubMed

New column leaching experiments were designed and used as an alternative rapid screening approach to element mobility assessment. In these experiments, field-moist material was treated with an extracting solution to assess the effects of acidification on element mobility in mine tailings. The main advantage of this version of column leaching experiments with partitioned segments is that they give quick information on current element mobility in conditions closely simulating field conditions to compare with common unrepresentative air-dried, sieved samples used for column leaching experiments. Layers from the tailings dump material were sampled and packed into columns. The design of columns allows extracting leachates from each layer. The extracting solutions used were natural (pH 6.8) and acidified (pH 4.2) rainwater. Metals and anions were determined in the leachates. The concentrations of metals (Ca, Mg, Fe, Mn, Al, Cr, Ni, Co, Zn, and Cu) in sample leachates were determined using ICP OES. The most important anions (NO3-, Cl-, and SO4(2)-) were determined using the closed system izotacophoresis ITP analyser. The chemical analytical data from tailings leaching and physico-chemical data from field measurements (including pH, conductivity, redox potential, temperature) were used for chemometric evaluation of element mobility. Principal factor analysis (PFA) was used to evaluate ions mobility from different layers of tailings dump arising from varied pH and redox conditions. It was found that the results from the partitioned column leaching illustrate much better complex processes of metals mobility from tailings dump than the total column. The chemometric data analysis (PFA) proofed the differences in the various layers leachability that are arising from physico-chemical processes due to chemical composition of tailings dump deposit. PMID:15109878

Cukrowska, Ewa M; Govender, Koovila; Viljoen, Morris

2004-07-01

144

Local Varying-Alpha Theories  

E-print Network

In a recent paper we demonstrated how the simplest model for varying alpha may be interpreted as the effect of a dielectric material, generalized to be consistent with Lorentz invariance. Unlike normal dielectrics, such a medium cannot change the speed of light, and its dynamics obey a Klein-Gordon equation. This work immediately suggests an extension of the standard theory, even if we require compliance with Lorentz invariance. Instead of a wave equation, the dynamics may satisfy a local algebraic relation involving the permittivity and the properties of the electromagnetic field, in analogy with more conventional dielectric (but still preserving Lorentz invariance). We develop the formalism for such theories and investigate some phenomenological implications. The problem of the divergence of the classical self-energy can be solved, or at least softened, in this framework. Some interesting new cosmological solutions for the very early universe are found, including the possibility of a bounce, inflation and e...

Barrow, John D

2014-01-01

145

Stakeholder value network analysis for the mobile services ecosystem  

E-print Network

The mobile services ecosystem has evolved and continues to evolve at a rapid pace adjusting to the different players competing to be part of the value creation and capture. This thesis attempts to capture a holistic view ...

Arvind, A. S. (Amarnath Sury)

2009-01-01

146

Colloid Mobilization by Displacement Fluid Fronts in Porous Media  

NASA Astrophysics Data System (ADS)

Colloids mobilized during imbibition and drainage events may serve as carriers of strongly sorbing contaminants and facilitate their transport through the vadoes zone. Passage of imbibition or drainage fronts through porous media involves considerable energy dissipation at the front due to pinning and release of interfaces and rapid pore emptying or filling. The abrupt interfacial jumps and pressure bursts at the front may entrain colloidal particles that otherwise would not be mobilize by the subsequent steady flows forming ahead or behind a passing front. We conducted pore-scale displacement experiments in sintered glass beads Hele-Shaw cells and observed motion of interfaces and colloids using high speed camera (1200 f/s) under varying flow regime and interfacial properties. Predictions based on the pore-scale observations were compared with macroscopic (e.g., column-scale) breakthrough behavior. Theoretical predictions of forces acting on colloids under steady shear and during inertial contact line sweeping a surface and quantification of front colloid-carrying capacity will also be presented.

Jin, Y.; Or, D.

2010-12-01

147

Online Creation of Panoramic Augmented Reality Annotations on Mobile Phones  

Microsoft Academic Search

A novel application lets users create panoramic images in real time on a mobile phone and annotate the physical environment using an augmented-reality interface. Annotations can be accurately mapped to the correct objects, despite varying user positions.

Tobias Langlotz; Daniel Wagner; Alessandro Mulloni; Dieter Schmalstieg

2012-01-01

148

Mobile Schools for a Mobile World  

ERIC Educational Resources Information Center

Overwhelmingly, independent schools are embracing mobile devices--laptops, iPads or other tablets, and smartphones--to enhance teaching and learning. This article describes the results of the "NAIS 2012 Mobile Learning Survey." Among its findings were that 75 percent of NAIS-member schools currently use mobile learning devices in at…

Booth, Susan

2013-01-01

149

Location-based augmented reality on mobile phones  

Microsoft Academic Search

The computational capability of mobile phones has been rapidly increasing, to the point where augmented reality has become feasible on cell phones. We present an approach to indoor localization and pose estimation in order to support augmented reality applications on a mobile phone platform. Using the embedded camera, the application localizes the device in a familiar environment and determines its

R. Paucher; M. Turk

2010-01-01

150

Efficient Key Distribution Schemes for Large Scale Mobile Computing Applications  

E-print Network

openers, security cameras etc., equipped with short range radios, will be controlled by hand-held devices networks consisting of large-scale deployments of mobile devices, efficient security mechanisms for securing large scale deployments of mobile devices. I. INTRODUCTION Rapidly lowering costs of computing

151

Personalized Intelligent Mobile Learning System for Supporting Effective English Learning  

Microsoft Academic Search

Since English has been an international language, how to enhance English levels of people by useful computer assisted learning forms or tools is a critical issue in non-English speaking countries because it definitely affects the overall competition ability of a country. With the rapid growth of wireless and mobile technologies, the mobile learning has been gradually considered as a novel

Chih-ming Chen; Shih-hsun Hsu

2008-01-01

152

Two-dimensional wavelet compression of ion mobility spectra  

Microsoft Academic Search

A two-dimensional wavelet compression method has been developed as a tool for portable ion mobility sensors. Ion mobility spectrometry (IMS) offers chemical sensors with low detection limits and rapid response for many compounds. Two-dimensional wavelet compression yields compressions greater than 99% without significant loss of information. A method has also been developed and evaluated to optimize the compression. The compression

Aaron A. Urbas; Peter B. Harrington

2001-01-01

153

Keys for growth in Japan's mature mobile market  

E-print Network

The objective of this thesis is to identify key factors that will produce further growth for NTT DoCoMo in Japan's mature mobile market. Since the early 1990s, the mobile phone market in Japan has grown rapidly, and ...

Oto, Hiroyuki

2005-01-01

154

Wi-Pie: Energy Harvesting in Mobile Electronic Devices  

Microsoft Academic Search

A recent study puts the number of mobile phones in use around the world at an astonishing 5 billion and these numbers are growing rapidly. This places the increase in energy consumption of mobile phones in the world at an alarming level. Wi-Pie or Wireless-Piezoelectric technique combines RF energy scavenging and piezoelectric energy harvesting technologies to provide an alternative method

B. Guru Karthik; S. Shivaraman; V. Aditya

2011-01-01

155

Local Varying-Alpha Theories  

E-print Network

In a recent paper we demonstrated how the simplest model for varying alpha may be interpreted as the effect of a dielectric material, generalized to be consistent with Lorentz invariance. Unlike normal dielectrics, such a medium cannot change the speed of light, and its dynamics obey a Klein-Gordon equation. This work immediately suggests an extension of the standard theory, even if we require compliance with Lorentz invariance. Instead of a wave equation, the dynamics may satisfy a local algebraic relation involving the permittivity and the properties of the electromagnetic field, in analogy with more conventional dielectric (but still preserving Lorentz invariance). We develop the formalism for such theories and investigate some phenomenological implications. The problem of the divergence of the classical self-energy can be solved, or at least softened, in this framework. Some interesting new cosmological solutions for the very early universe are found, including the possibility of a bounce, inflation and expansion with a loitering phase, all of which are induced by early variations in alpha.

John D. Barrow; Joao Magueijo

2015-01-30

156

Mobile Measurement of an Atmospheric Tracer  

SciTech Connect

This paper describes a mobile analyzer for sulfur hexafluoride, an atmospheric tracer. A commercial instrument is used on-board a moving vehicle to measure tracer concentrations in the parts per trillion (ppt) range. This instrument provides rapid, in-the-field data at minimum cost.

Milham, R.C.

2001-03-09

157

Tactical Mobile Mesh Network System Design  

Microsoft Academic Search

Tactical mobile mesh systems are wireless communication networks characterized by: harsh propagation channels and interference, frequent and rapid changes in the network topology, the requirement for very robust, low latency multimedia information decimation, and no centralized network control. In this paper we describe a technology testbed designed to address these challenges. The testbed is based on advanced waveform technologies, modern

Adam Blair; Thomas Brown; Keith M. Chugg; Mark Johnson

2007-01-01

158

Mobile augmented reality: design issues and opportunities  

Microsoft Academic Search

With the rapid evolution of mobile devices, smart-phones in particular, comes the ability to create new experiences that enhance the way we see, interact, and express ourselves, within the world that surrounds us. We can blend data from our senses and our devices in myriad ways that simply weren't possible before. This workshop explores the current and future state of

Marco de Sa; Elizabeth F. Churchill; Katherine Isbister

2011-01-01

159

Acceptable Download Times in the Mobile Internet  

Microsoft Academic Search

The web is becoming more and more graphical and the average size of pages has been growing during the years. Most users enjoy fast download of heavy pages, and the experience of using the web is highly visual. The mobile Internet, e.g. WAP or i-Mode, provides a considerably more limited environment for Internet usage. Although bigger colour displays are rapidly

Virpi Roto; Anne Kaikkonen

2003-01-01

160

MOBILE LABORATORY FOR BACILLUS ANTHRACIS DETECTION  

Technology Transfer Automated Retrieval System (TEKTRAN)

In response to a bioterrorism event in the Washington, DC area in October 2001 a mobile laboratory (ML) was set up in the city to conduct rapid molecular tests on environmental samples for the detection of Bacillus anthracis spores. The ML contained two Class I laminar flow hoods, a small autoclave,...

161

The DIANA Approach to Mobile Computing  

E-print Network

and varied communication patterns. Our architecture achieves display and network independence by de- coupling the user interface logic and communication logic from the processing logic of each application. Such separation allows applications to operate in the workplace as well as in a mobile environment in which

Keller, Arthur M.

162

Mobile power management for wireless communication networks  

Microsoft Academic Search

For fixed quality-of-service constraints and varying channel interference, how should a mobile node in a wireless network adjust its transmitter power so that energy consumption is minimized? Several transmission schemes are considered, and optimal solutions are obtained for channels with stationary, extraneous interference. A simple dynamic power management algorithm based on these solutions is developed. The algorithm is tested by

John M. Rulnick; Nicholas Bambos

1997-01-01

163

Anisotropic charged impurity-limited carrier mobility in monolayer phosphorene  

NASA Astrophysics Data System (ADS)

The room temperature carrier mobility in atomically thin 2D materials is usually far below the intrinsic limit imposed by phonon scattering as a result of scattering by remote charged impurities in its environment. We simulate the charged impurity-limited carrier mobility ? in bare and encapsulated monolayer phosphorene. We find a significant temperature dependence in the carrier mobilities (? ? T-?) that results from the temperature variability of the charge screening and varies with the crystal orientation. The anisotropy in the effective mass leads to an anisotropic carrier mobility, with the mobility in the armchair direction about one order of magnitude larger than in the zigzag direction. In particular, this mobility anisotropy is enhanced at low temperatures and high carrier densities. Under encapsulation with a high-? overlayer, the mobility increases by up to an order of magnitude although its temperature dependence and its anisotropy are reduced.

Ong, Zhun-Yong; Zhang, Gang; Zhang, Yong Wei

2014-12-01

164

Location-based augmented reality on mobile phones Remi Paucher and Matthew Turk  

E-print Network

Location-based augmented reality on mobile phones R´emi Paucher and Matthew Turk Computer Science The computational capability of mobile phones has been rapidly increasing, to the point where augmented reality has in order to support augmented reality applications on a mobile phone platform. Using the embedded camera

California at Santa Barbara, University of

165

Improving UDP and TCP performance in mobile ad hoc networks with INSIGNIA  

Microsoft Academic Search

There is a growing need to provide better service differentiation in mobile ad hoc networks; however, this is challenging. These networks are characterized as being multihop in nature where the wireless topology that interconnects mobile hosts\\/routers can change rapidly in unpredictable ways or remain relatively static over long periods of time. Power and bandwidth constrained, mobile ad hoc networks typically

Seoung-Bum Lee; Gahng-Seop Ahn; Andrew T. Campbell

2001-01-01

166

Business models and transactions in mobile electronic commerce: requirements and properties  

Microsoft Academic Search

Advances in wireless network technology and the continuously increasing number of users of hand-held terminals make the latter a possible channel for offering personalized services to mobile users and give pace to the rapid development of mobile electronic commerce (MEC). MEC operates partially in a different environment than Internet e-commerce due to the special characteristics and constraints of mobile terminals

Aphrodite Tsalgatidou; Evaggelia Pitoura

2001-01-01

167

Investigating the Determinants and Age and Gender Differences in the Acceptance of Mobile Learning  

ERIC Educational Resources Information Center

With the proliferation of mobile computing technology, mobile learning (m-learning) will play a vital role in the rapidly growing electronic learning market. M-learning is the delivery of learning to students anytime and anywhere through the use of wireless Internet and mobile devices. However, acceptance of m-learning by individuals is critical…

Wang, Yi-Shun; Wu, Ming-Cheng; Wang, Hsiu-Yuan

2009-01-01

168

Using RSS to Support Mobile Learning Based on Media Richness Theory  

ERIC Educational Resources Information Center

With the rapid development of mobile technologies, mobile learning has become a new trend in education. A better understanding of how to effectively use communication technologies to improve mobile learning is important. The purpose of this paper is to evaluate the media richness of various message delivery methods in the proposed m-learning…

Lan, Yu-Feng; Sie, Yang-Siang

2010-01-01

169

Development outcomes of internet and mobile phones use in Kenya: the households' perspectives  

Microsoft Academic Search

Purpose – Usage of internet and mobile phones has promoted and sometimes hindered various aspects of development bringing radical changes to Kenyan households in the last couple of years. The rapid spread of mobile phones, mobile broadband and internet usage at the household level has increased the potential of these technologies leading to development outcomes. This paper aims to focus

Margaret Nyambura Ndungu; Timothy M. Waema

2011-01-01

170

Stochastic Differential Equations for Modeling, Estimation and Identification of Mobile-to-Mobile Communication Channels  

SciTech Connect

Mobile-to-mobile networks are characterized by node mobility that makes the propagation environment time varying and subject to fading. As a consequence, the statistical characteristics of the received signal vary continuously, giving rise to a Doppler power spectral density (DPSD) which varies from one observation instant to the next. The current models do not capture and track the time varying characteristics. This paper is concerned with dynamical modelling of mobile-to-mobile channels, parameter estimation and identification from received signal measurements. The evolution of the propagation environment is described by stochastic differential equations. In particular, it is shown that the parameters of the models can be determined by approximating the band-limited DPSD using the Gauss-Newton method. However, since the DPSD is not available online, we propose to use a filter-based expectation maximization algorithm and Kalman filter to estimate the channel parameters and states, respectively. The scheme results in a finite dimensional filter which only uses the first and second order statistics. The algorithm is recursive allowing the inphase and quadrature components and parameters to be estimated online from received signal measurements. The algorithms are tested using experimental data collected from moving sensor nodes in indoor and outdoor environments demonstrating the method s viability.

Olama, Mohammed M [ORNL; Djouadi, Seddik M [ORNL; Charalambous, Prof. Charalambos [University of Cyprus

2009-01-01

171

People On The Move: Some Thoughts On Human Dispersal In Relation To Rapid Climatic Change  

NASA Astrophysics Data System (ADS)

It is still generally assumed that the default situation for past humans must have been to be sedentary. That is to say, given a chance people would have settled in one area (with a good supply of resources) and established clearly-defined territories. Such concepts presuppose that much of human existence was conducted in climatic conditions sim- ilar to the relatively stable ones seen in the Holocene. What effects do rapid climatic fluctuations have upon environmental carrying capacity, and thus upon human mobil- ity and exploitation patterns? Such an approach could be called 'non-analogue', as it does not seek to impose [current] Holocene patterns upon the Pleistocene, in the same way that 'non-analogue' animal and plant communities are now routinely described for the same period. If one adopts non-analogue perspectives, perhaps one could also argue that in many cases mobility was the rule and not the exception. Turning the conventional wisdom around, we can ask why people should remain in an area. What are the characteristics of that area which could have encouraged people to become less mobile? I do not argue that all groups were mobile: some cannot have been, and not every member of other groups would have been equally mobile (differentiation on grounds of age and sex). In addition, mobility patterns must also have varied over time, although we should not necessarily expect a discernible linear trend either towards or away from greater mobility, because such behaviour operates within a climatic and environmental framework as well as a socio-economic one. If climate oscillated rapidly, it is feasible to suggest that such fluctuations affected environmental stability and thus carrying capacity. The resource species present and their availability would therefore affect the possibilities for human mobility. When discussing the possibilities for human dispersal into new regions, we essentially have a choice between two competing models: the Wave of Advance (sensu Boserup, Cavalli-Svorza &Ammermann) or Directional dispersal. The former model posits a slow, group-fission-based dispersal across the landscape, driven by 'push' factors such as population pressure. We should not expect resources to be evenly-distributed across the landscape, and thus if one adopts a Wave of Advance interpretation, one would have to consider the possibility of rapid, directional jumps between favoured resource 1 patches, seriously damaging the model's viability. On the other hand, Directional dis- persal models expect more focused movement, with certain ecotones (such as rivers or coasts) being preferred, and are driven more by 'pull' factors which draw people across the landscape relatively rapidly. In the latter model, 'infill' occupation between the initially occupied areas can occur if demanded by socio-economic requirements of the group[s]. This paper will explore all these issues, and discuss how we might identify and test them in the archaeological record, and set them in the climatic context. The effects of climatic factors on past human behaviour have to be qualified or discounted before we can really start to discuss social or 'cultural' explanations. 2

Davies, W.

172

Mobile Search - Social Network Search Using Mobile Devices Demonstration  

Microsoft Academic Search

Mobile search prototype demonstrates the possibilities of social network search in N800 mobile devices. Search is initiated from a N800 mobile device to search the contacts in mobile device's addressbook. The contacts can be other N800 mobile devices running mobile Web server or normal Web servers in the Internet with Drupal content management system. Mobile device users can select which

P. Tiago; N. Kotilainen; M. Vapa

2008-01-01

173

How Mobility Increases Mobile Cloud Computing Processing Capacity  

E-print Network

How Mobility Increases Mobile Cloud Computing Processing Capacity Anh-Dung Nguyen, Patrick S--In this paper, we address a important and still unanswered question in mobile cloud computing "how mobility the resilience of mobile cloud computing services. Keywords--Mobile cloud computing, mobility, quality of service

Paris-Sud XI, Université de

174

Mobile Game Based Learning: Designing a Mobile Location Based Game  

NASA Astrophysics Data System (ADS)

Today’s students grow up with rapidly changing technology. They spend much of their spare time using computer games, mobile phones and other toys and tools of the digital age. These things are part of their lives. Now it’s time to redesign the educational system and to adjust it to today’s technological opportunities. The current system is out of date. It isn’t able to arouse interest in students. With new technology, schools are able to rebuild their educational system and to spark the student’s interest in learning and further education. Passive and disinterested children will be a thing of the past.

Schadenbauer, Sandra

175

Future Trends in Mobile Commerce: Service Offerings, Technological Advances and Security Challenges  

Microsoft Academic Search

Driven by the ubiquitous deployment of mobile systems, the widespread use of the Internet, the rapid advances in wireless technologies, the insatiable demand for high-speed interactive multimedia services, and the growing need for secure wireless machine-to-machine communications, mobile commerce is rapidly approaching the business forefront. In this paper, future trends in major aspects of mobile commerce are discussed. In light

Ali Grami; Bernadette Schell

2004-01-01

176

A New Method of Viewing Attachment Document of eMail on Various Mobile Devices  

NASA Astrophysics Data System (ADS)

As the computing power of the mobile devices is improving rapidly, many kinds of web services are also available in mobile devices just as Email service. Mobile Mail Service began early, but this service is mostly limited in some specified mobile devices such as Smart Phone. That is a limitation that users have to purchase specified phone to be benefited from Mobile Mail Service. In this paper, it uses DIDL (digital item declaration language) markup type defined in MPEG-21 and MobileGate Server, and solved this problem. DIDL could be converted to other markup types which are displayed by mobile devices. By transforming PC Web Mail contents including attachment document to DIDL markup through MobileGate Server, the Mobile Mail Service could be available for all kinds of mobile devices.

Ko, Heeae; Seo, Changwoo; Lim, Yonghwan

177

Planning collision-free trajectories in time-varying environments: a two-level hierarchy  

Microsoft Academic Search

We propose a two-level hierarchy for planning collision-free trajectories in time varying environments. Global geometric algorithms for trajectory planning are used in conjunction with a local avoidance strategy. Simulations have been developed for a mobile robot in the plane among stationary and moving obstacles. Essentially, the robot has a global geometric planner that provides a coarse global trajectory (the path

Kamal Kant; Steven W. Zucker

1988-01-01

178

Mobile Router Technology Development  

NASA Technical Reports Server (NTRS)

Cisco Systems and NASA have been performing joint research on mobile routing technology under a NASA Space Act Agreement. Cisco developed mobile router technology and provided that technology to NASA for applications to aeronautic and space-based missions. NASA has performed stringent performance testing of the mobile router, including the interaction of routing and transport-level protocols. This paper describes mobile routing, the mobile router, and some key configuration parameters. In addition, the paper describes the mobile routing test network and test results documenting the performance of transport protocols in dynamic routing environments.

Ivancic, William D.; Stewart, David H.; Bell, Terry L.; Kachmar, Brian A.; Shell, Dan; Leung, Kent

2002-01-01

179

Changes in Soil Minerology Reduce Phosphorus Mobility During Anoxic Soil Conditions  

NASA Astrophysics Data System (ADS)

Phosphorus (P) transfer from the landscape to receiving waters is an important environmental concern because these diffuse losses may cause widespread water quality impairments which can accelerate freshwater eutrophication. Phosphorus (P) mobilization from soil to surface and subsurface flow paths is controlled by numerous factors, and thus it can vary greatly with time and landscape scale. To determine whether P mobilization during soil saturation in the landscape was caused or controlled by complexation, iron reduction or ligand exchange, experiments were carried out to better characterize the interrelationships of varying P sources with dissolved organic carbon (DOC) and soil anoxic conditions. The soil incubation experiments consisted of treatments with distilled water, 5 mM acetic acid (HAc), 0.05% humic acid (HA) and glucose (40 mM) at 26 o C under anaerobic conditions to isolate effects of the various P exchange processes. The experimental results suggest that during soil saturation, the loosely bound P, which is primarily associated with iron oxyhydroxides, was mobilized by both reduction and complexation processes. Good correlations were observed between ferrous iron (Fe+2) and DOC, and between total dissolved phosphorus (TDP) and DOC, facilitating P desorption to the soil water. The anaerobic soil conditions with different P sources also indicated that mineralization facilitated P mobility, mainly due to chelation (humics and metabolites) and as a result of the bio-reduction of iron when fresh litter and grass were present. The organic P sources which are rich in carbohydrate and cellulose and that undergo fermentation due to the action of lactate forming organisms also caused a release of P. The easily metabolizable DOC sources lead to intensive bio-reduction of soil with the release of Fe, however this did not necessarily appear to cause more TDP in the soil solution. The varying P additions in soils with water, HAc and glucose (40mm) before and after soil incubation showed higher P sorption than aerobic soil due to reduced iron (Fe+2) - P mineral formation. Some of the readily available P in the soil solution tended to co-precipitate quickly with Fe, Al, Ca, and Mn, but it also resulted in the formation of earthy masses of vivianite [Fe2+3(PO4)2 . 8 H20], thus almost completely immobilizing P. These findings suggest that where conditions in the landscape are saturated, but remain stagnant for extended time periods, P additions may not necessarily enhance leaching once hydrological transport resumes. The temporal nature of P mobilization processes combined with rapid (i.e., preferential flow) hydrological transport appears to have a more important role in controlling P transport through the landscape.

Giri, S. K.; Geohring, L. D.; Richards, B. K.; Walter, M.; Steenhuis, T. S.

2008-05-01

180

PUBLISHER'S NOTE: Rapid Communications Rapid Communications  

NASA Astrophysics Data System (ADS)

As part of a general review of Superconductor Science and Technology, we have been examining the scope for Rapid Communications (RAPs). We recognize these articles make up an important part of the journal representing the latest state-of-the-art research in superconductivity. To reflect this, we have devised a new scope for this article type: 'Rapid Communications. The journal offers open access to outstanding short articles (no longer than 5 journal pages or 4500 words including figures) reporting new and timely developments in superconductivity and its applications. These articles should report very substantial new advances in superconductivity to the readers of Superconductor Science and Technology, but are not expected to meet any requirement of 'general interest'. RAPs will be processed quickly (average receipt to online publication for RAPs is around 60 days) and are permanently free to read in the electronic journal. Authors submitting a RAP should provide reasons why the work is urgent and requires rapid publication. Each RAP will be assessed for suitability by our Reviews and Rapid Communications Editor before full peer review takes place.' The essential points are: They should report very substantial new advances in superconductivity and its application; They must be no longer than 5 journal pages long (approx. 4500 words); Average publication time for a Rapid Communication is 60 days; They are free to read. As mentioned in the previous publisher's announcement (2009 Supercond. Sci. Technol. 22 010101), each submitted Rapid Communication must come with a letter justifying why it should be prioritized over regular papers and will be pre-assessed by our Reviews and Rapid Communications Editor. In addition, we will work with the authors of any Rapid Communication to promote and raise the visibility of the work presented in it. We will be making further changes to the journal in the near future and we write to you accordingly. Thank you for your kind attention and I look forward to receiving your next Rapid Communication.

Miller, Tom

2009-09-01

181

Streaming mobile augmented reality on mobile phones  

Microsoft Academic Search

Continuous recognition and tracking of objects in live video cap- tured on a mobile device enables real-time user interaction. We demonstrate a streaming mobile augmented reality system with 1 second latency. User interest is automatically inferred from camera movements, so the user never has to press a button. Our system is used to identify and track book and CD covers

David M. Chen; Sam S. Tsai; Ramakrishna Vedantham; Radek Grzeszczuk; Bernd Girod

2009-01-01

182

Streaming mobile augmented reality on mobile phones  

Microsoft Academic Search

Continuous recognition and tracking of objects in live video captured on a mobile device enables real-time user interaction. We demonstrate a streaming mobile augmented reality system with 1 second latency. User interest is automatically inferred from camera movements, so the user never has to press a button. Our system is used to identify and track book and CD covers in

D. M. Chen; Sam S. Tsai; Ramakrishna Vedantham; Radek Grzeszczuk; Bernd Girod

2009-01-01

183

Mobile Computing/Mobile Computing/Mobile Computing/Mobile Computing/ Mobile NetworksMobile NetworksMobile NetworksMobile Networks  

E-print Network

.g., Ethernet) Evolution WiFi Protected Access (WPA) and WPA2 8 IEEE 802.11 Security MAC at sender encryptsMobile NetworksMobile Networks IEEE 802.11: SecurityIEEE 802.11: SecurityIEEE 802.11: SecurityIEEE 802.11 in 802.11) 4 4 authenticityauthenticityauthenticityauthenticity

Yu, Chansu

184

Tandem mobile robot system  

DOEpatents

A robotic vehicle system for terrain navigation mobility provides a way to climb stairs, cross crevices, and navigate across difficult terrain by coupling two or more mobile robots with a coupling device and controlling the robots cooperatively in tandem.

Buttz, James H. (Albuquerque, NM); Shirey, David L. (Albuquerque, NM); Hayward, David R. (Albuquerque, NM)

2003-01-01

185

Ion mobility sensor system  

DOEpatents

An ion mobility sensor system including an ion mobility spectrometer and a differential mobility spectrometer coupled to the ion mobility spectrometer. The ion mobility spectrometer has a first chamber having first end and a second end extending along a first direction, and a first electrode system that generates a constant electric field parallel to the first direction. The differential mobility spectrometer includes a second chamber having a third end and a fourth end configured such that a fluid may flow in a second direction from the third end to the fourth end, and a second electrode system that generates an asymmetric electric field within an interior of the second chamber. Additionally, the ion mobility spectrometer and the differential mobility spectrometer form an interface region. Also, the first end and the third end are positioned facing one another so that the constant electric field enters the third end and overlaps the fluid flowing in the second direction.

Xu, Jun; Watson, David B.; Whitten, William B.

2013-01-22

186

Autonomous Virtual Mobile Nodes  

E-print Network

This paper presents a new abstraction for virtual infrastructure in mobile ad hoc networks. An AutonomousVirtual Mobile Node (AVMN) is a robust and reliable entity that is designed to cope with theinherent difficulties ...

Dolev, Shlomi

2005-06-15

187

Mobile Proactive secret sharing  

E-print Network

This thesis describes mobile proactive secret sharing (MPSS), an extension of proactive secret sharing. Mobile proactive secret sharing is much more flexible than proactive secret sharing in terms of group membership: ...

Schultz, David Andrew

2007-01-01

188

Contributed Paper Rapid Assessment of Risks to a Mobile Marine  

E-print Network

Protegida a Escala de Ecosistema Resumen: Las redes de ´areas marinas protegidas (AMPs) a escala de pastos marinos: uso de redes, cacer´ia por nativos, pesca con redes de arrastre, tr´afico de nav´ios y riesgo, se tendr´ia que disminuir el uso de redes comerciales y la cacer´ia por nativos en ´areas remotas

Marsh, Helene

189

Third International Workshop on Ion Mobility Spectrometry  

NASA Technical Reports Server (NTRS)

Basic research in ion mobility spectrometry has given rise to rapid advancement in hardware development and applications. The Third International Workshop on Ion Mobility Spectrometry (IMS) was held October 16-19, 1994, at Johnson Space Center to provide a forum for investigators to present the most recent results of both basic and applied IMS research. Presenters included manufacturers and various users, including military research organizations and drug enforcement agencies. Thirty papers were given in the following five sessions: Fundamental IMS Studies, Instrument Development, Hyphenated IMS Techniques, Applications, and Data Reduction and Signal Processing. Advances in hardware development, software development, and user applications are described.

Cross, John H. (editor)

1995-01-01

190

Rapid shallow breathing  

MedlinePLUS

Tachypnea; Breathing - rapid and shallow; Fast shallow breathing; Respiratory rate - rapid and shallow ... your oxygen level is too low and nebulized respiratory treatments if you are having an asthma attack.

191

The Harris Centre: Knowledge Mobilization  

E-print Network

Mobilization: Harris Centre Perspective Knowledge Mobilization: Programs & Initiatives The Harris Centre's Capacity Identify Priority Themes and Projects relating to: Teaching Research Outreach #12;Harris Centre Mobilization: HC Perspective What is Knowledge Mobilization? Engage stakeholders to define issues / needs

deYoung, Brad

192

Towards Mobile Cryptography  

Microsoft Academic Search

Mobile code technology has become a driving force for recent advances in distributed systems. The concept of mo- bility of executable code raises major security problems. I n this paper we deal with the protection of mobile code from possibly malicious hosts. We conceptualize on the specific cryptographic problems posed by mobile code. We are able to provide a solution

Tomas Sander; Christian F. Tschudin

1998-01-01

193

Mobile Conference Connection Conferencing  

E-print Network

Mobile Conference Connection Conferencing · Help increase productivity while out of the office-mail meeting invitations from your mobile device · Access to "Click to Join" features · Initiate an Instant or other mobile devices can provide a quick and efficient means to respond to work demands. But, what

194

MOBILE PROXIMITY PAYMENT: ECOSYSTEM  

E-print Network

MOBILE PROXIMITY PAYMENT: ECOSYSTEM AND OVERVIEW OF NFC TECHNOLOGY 1. Introduction Handsets confirm topic in the mobile payment field and promises a revolution in the world of payments. This article traces the state-of-the-art in mobile proximity payment field and traces the most probable evolution

Shamos, Michael I.

195

Marketing mobile imaging services.  

PubMed

Competition in the mobile imaging arena has put radiologists, radiology directors, and other health care professionals in the unfamiliar position of being marketing agents for their services. Mobile imaging is being promoted through consumer advertising as well as through the traditional route of physician referral. This article offers some of the marketing lessons being learned in the mobile arena. PMID:10283693

McCue, P

1987-09-01

196

Mobile Student Information System  

ERIC Educational Resources Information Center

Purpose: A mobile student information system (MSIS) based on mobile computing and context-aware application concepts can provide more user-centric information services to students. The purpose of this paper is to describe a system for providing relevant information to students on a mobile platform. Design/methodology/approach: The research…

Asif, Muhammad; Krogstie, John

2011-01-01

197

Electrophoretic mobilities of erythrocytes in various buffers  

NASA Technical Reports Server (NTRS)

The calibration of space flight equipment depends on a source of standard test particles, this test particle of choice is the fixed erythrocyte. Erythrocytes from different species have different electrophoretic mobilities. Electrophoretic mobility depends upon zeta potential, which, in turn depends upon ionic strength. Zeta potential decreases with increasing ionic strength, so cells have high electrophoretic mobility in space electrophoresis buffers than in typical physiological buffers. The electrophoretic mobilities of fixed human, rat, and rabbit erythrocytes in 0.145 M salt and buffers of varying ionic strength, temperature, and composition, to assess the effects of some of the unique combinations used in space buffers were characterized. Several effects were assessed: glycerol or DMSO (dimethylsulfoxide) were considered for use as cryoprotectants. The effect of these substances on erythrocyte electrophoretic mobility was examined. The choice of buffer depended upon cell mobility. Primary experiments with kidney cells established the choice of buffer and cryoprotectant. A nonstandard temperature of EPM in the suitable buffer was determined. A loss of ionic strength control occurs in the course of preparing columns for flight, the effects of small increases in ionic strength over the expected low values need to be evaluated.

Plank, L. D.; Kunze, M. E.; Todd, P. W.

1985-01-01

198

Adaptive mobility aids for the elderly  

NASA Astrophysics Data System (ADS)

Loss of mobility in the elderly causes a significant economic burden to caregivers and is one of the most significant determinants of depression and loss of muscle strength and productivity in this age group. Mobility aids can assist with locomotion by providing physical support, however they fail to provide direction guidance and avoidance of obstacles and hazards. This talk will focus on design of intelligent adaptive wheeled walkers. By allowing the user varying degrees of control, from complete to collaborative, these walkers afford the user with the feeling of control, while helping to increase the ease and safety of their daily travels. The control systems of these walkers differ from those of other mobility aids and mobile robots because they must both assist in mobility and provide balance and support, but also give directional aid if necessary. These functions must be performed in a tight loop adaptation with a human whose input may be difficult to predict. Through the use of a wheeled walker equipped with force and sonar sensors, we were able to develop an intelligent self-guided mobility aid that can provide improved independence, autonomy, and quality of life for the elderly.

Wasson, Glenn; Gunderson, James; Cvetanovich, Michael; Kell, Steven; Graves, S.; Felder, Robin A.

2001-10-01

199

Varied clinical presentation of os odontoideum: a case report  

PubMed Central

Objective: To present a case of an os odontoideum and to provide insight into the varied clinical presentations. Clinical Features: A 54 year old man presented with chronic neck pain without headache. A clinical examination was performed and the chiropractor viewed his AP and lateral radiographs. Previous flexion/ extension radiographs and MRI imaging from 2009 were requested for review. The patient was diagnosed with grade II mechanical neck pain. Treatment was rendered that day which included spinal manipulation/ mobilization. Several days later the requested imaging reports were received and described the presence of an os odontoideum. Conclusion: In the presence of os odontoideum, familiarity with the signs and symptoms of potential cervical instability is imperative. Health care providers must remain diligent in their patient histories, physical exams, and imaging. This case highlights the importance of following up on imaging studies to rule out diagnoses that would involve treatment contraindications thus ensuring safe and effective treatment. PMID:25202154

Chrobak, Karen; Larson, Ryan; Stern, Paula J.

2014-01-01

200

Persistent identification of time-varying systems  

Microsoft Academic Search

Identification of time-varying systems, especially slowly time-varying systems, is of importance in the development of a comprehensive theory of adaptation. The persistent identification measures employed in this paper capture a main characterization in such identification problems, namely, one input signal must be used for identification of all possible observation windows. This paper establishes several essential features in persistent identification problems

Le Yi Wang

1997-01-01

201

Fractal analysis of time varying data  

DOEpatents

Characteristics of time varying data, such as an electrical signal, are analyzed by converting the data from a temporal domain into a spatial domain pattern. Fractal analysis is performed on the spatial domain pattern, thereby producing a fractal dimension D.sub.F. The fractal dimension indicates the regularity of the time varying data.

Vo-Dinh, Tuan (Knoxville, TN); Sadana, Ajit (Oxford, MS)

2002-01-01

202

Reconfigurable mobile manipulation for accident response  

SciTech Connect

The need for a telerobotic vehicle with hazard sensing and integral manipulation capabilities has been identified for use in transportation accidents where nuclear weapons are involved. The Accident Response Mobile Manipulation System (ARMMS) platform has been developed to provide remote dexterous manipulation and hazard sensing for the Accident Response Group (ARG) at Sandia National Laboratories. The ARMMS' mobility platform is a military HMMWV [High Mobility Multipurpose Wheeled Vehicle] that is teleoperated over RF or Fiber Optic communication channels. ARMMS is equipped with two high strength Schilling Titan II manipulators and a suite of hazardous gas and radiation sensors. Recently, a modular telerobotic control architecture call SMART (Sandia Modular Architecture for Robotic and Teleoperation) has been applied to ARMMS. SMART enables input devices and many system behaviors to be rapidly configured in the field for specific mission needs. This paper summarizes current SMART developments applied to ARMMS.

ANDERSON,ROBERT J.; MORSE,WILLIAM D.; SHIREY,DAVID L.; CDEBACA,DANIEL M.; HOFFMAN JR.,JOHN P.; LUCY,WILLIAM E.

2000-06-06

203

Mathematical Geology, Vol. 32, No. 7, 2000 Surface Fitting of Rapidly Varying Data Using Rank  

E-print Network

Coding: Application to Geophysical Surfaces1 Christian Gout2 and Dimitri Komatitsch3 Addressing Mathematics, ERS 2055-CNRS, Universit´e de Pau, France. e-mail: christian.gout@univ-pau.fr 3Department;874 Gout and Komatitsch medium-resolution set of surface points, often called a digital elevation model

Komatitsch, Dimitri

204

Global Mobility for Psychologists: The Role of Psychology Organizations in the United States, Canada, Europe, and Other Regions  

ERIC Educational Resources Information Center

Global mobility for psychologists is rapidly improving because of an emerging consensus on recognition standards, the demand for cross-border mobility both internal and external to the profession, and the efforts of membership, credentialing, and regional organizations to promote mobility. In the United States, multiple credentialing organizations…

Hall, Judy E.; Lunt, Ingrid

2005-01-01

205

Composite Social Network for Predicting Mobile Apps Installation Wei Pan and Nadav Aharony and Alex (Sandy) Pentland  

E-print Network

Composite Social Network for Predicting Mobile Apps Installation Wei Pan and Nadav Aharony and Alex of predicting mobile application (known as "apps") installation using social networks and explain its challenge applications (referred as "apps") installation, as the mobile application business is growing rapidly (Elli

206

Improvement of the QoS via an Adaptive and Dynamic Distribution of Applications in a Mobile Environment  

Microsoft Academic Search

Mobile computing is a domain in great expansion. Wire- less networks and Portable Information Appliances (PIAs) are developing very rapidly. More and more mobile users would like to perform their multimedia applications with the same facility as on their desktop station. Use of such ap- plications in a mobile environment raises new challenges. These applications are interactive and extremely costly

Françoise André; Anne-marie Kermarrec; Frederic Le Mouel

2000-01-01

207

Visuomotor adaptation and generalization with repeated and varied training.  

PubMed

Many studies have shown that reaching movements to visual targets can rapidly adapt to altered visual feedback of hand motion (i.e., visuomotor rotation) and generalize to new target directions. This generalization is thought to reflect the acquisition of a neural representation of the novel visuomotor environment that is localized to the particular trained direction. In these studies, participants perform movements to a small number of target locations repeatedly. However, it is unclear whether adaptation and generalization are comparable when target locations are constantly varied and participants reach to visual targets one time only. Here, we compared performance for reaches to a 30° counter-clockwise visuomotor rotation to four targets, spaced 90° apart across four areas of workspace 18 times each (repeated practice (RP)) with one time only reaching movements to 72 targets, spaced 5° apart (varied practice (VP)). For both training groups, participants performed 18 reaches to radial targets (either at the repeated or varied location) in a specific area of the workspace (i.e., one of four quadrants) before reaching in the adjacent workspace. We found that the RP group adapted more completely compared to the VP group. Conversely, the VP group generalized to new target directions more completely when reaching without cursor feedback compared to the RP group. This suggests that RP and VP follow a mainly common pattern of adaptation and generalization represented in the brain, with benefits of faster adaptation with RP and more complete generalization with VP. PMID:23455723

Neva, Jason L; Henriques, Denise Y P

2013-05-01

208

Cellular calcium mobilization  

SciTech Connect

In vascular and other smooth muscles, occurrence of intracellular Ca stores which can be mobilized to support contraction may be a general phenomenon. The Ca stores are characterized by the requirement for release by high concentrations of agonists acting on plasma membrane receptors, by the failure of the released Ca2+ to recycle to the store, by the occurrence of rapid refilling of the store from the extracellular space, and by disappearance of the store when the plasma membrane is made leaky by saponin. In contrast to agonist-released Ca stores, those released by caffeine to support contraction in Ca2+-free solutions are more slowly lost and refilled, are not always emptied when the agonist-related store is emptied, and do not disappear after saponin treatment. Stores released by agonists have been suggested to be in the endoplasmic reticulum near the plasma membrane or at the inner aspect of the plasma membrane related to high affinity, pH-dependent Ca-binding sites. Caffeine-released stores are assumed to be in endoplasmic reticulum. Continued exposure of some tissues to Ca2+-free solutions unmasks what is considered to be a recycling Ca store releasable by agonists. Release of Ca2+ and its reaccumulation in this store appear to be slower than at the nonrecycling store. The contractions which persist for many hours in Ca2+-free solution are inhibited temporarily by Ca2+ restoration. Existence of a recycling store of releasable Ca2+ requires occurrence of mechanisms to abolish Ca2+ extrusion or leak-out of the cell and to ensure recycling to the same store.

Daniel, E.E.

1984-01-01

209

Ad Hoc Mobile Networking and General Mobility Issues Ramon Lawrence  

E-print Network

Ad Hoc Mobile Networking and General Mobility Issues Ramon Lawrence Department of Computer Science of networking and mobility come many interesting opportunities and difficult problems. Mobile computing allows around in the environment. Unfortunately, to support this mobility places several restrictive restraints

Lawrence, Ramon

210

The Use of Light Rail or Light Rapid Transit Systems by Individuals with Severe Visual Impairments.  

ERIC Educational Resources Information Center

This study investigated the relationship between use of light rapid or light rail transit (LRT) systems by persons with severe visual impairments and independence in orientation and mobility. It found that orientation and mobility training on LRT systems would resolve many of the difficulties that users encountered. Modifications to improve…

Svendsen, K.

1994-01-01

211

Solar mass-varying neutrino oscillations  

E-print Network

We propose that the solar neutrino deficit may be due to oscillations of mass-varying neutrinos (MaVaNs). This scenario elucidates solar neutrino data beautifully while remaining comfortably compatible with atmospheric neutrino and K2K data...

Marfatia, Danny; Huber, P.; Barger, V.

2005-11-18

212

Addressing Mobile Phone Diversity in Ubicomp Experience Development  

Microsoft Academic Search

Mobile phones are a widely-available class of device with supporting communications infrastructure which can be appropriated\\u000a and exploited to support ubicomp experiences. However mobile phones vary hugely in their capabilities. We explore how a single\\u000a dimension of phone application type embodies the critical trade-off between capability and availability, i.e. between what can be done and the fraction of potential\\u000a participants’

Chris Greenhalgh; Steve Benford; Adam Drozd; Martin Flintham; Alastair Hampshire; Leif Oppermann; Keir Smith; Christoph Von Tycowicz

2007-01-01

213

Autonomous mobile platform II  

Microsoft Academic Search

The paper presents design of autonomous mobile platform based on the all terrain 1\\/8th scale four wheel drive radio control model. In this paper was considered problem of automatic control of mobile platform using information from GPS system, electronic compass and encoder. The mobile platform is equipped in two-stroke glow engine, heavy-duty drive train and wide-track suspension and controller based

Krzysztof Jaskot; Artur Babiarz

2011-01-01

214

Productive Economy InternetMobilephonesBudgetanalysisGreeneconomyRapid  

E-print Network

the first solid polymer electrolyte ­ kick- starting a new field in battery technology for mobiles 1987 15 computer design files ­ using plastic lays foundation for new low-cost, low- waste manufacturing techniques 1984 RCUK `Application of Computing to Manufacturing Engineering' programme supports early rapid

Berzins, M.

215

Adolescents’ risk perceptions on mobile phones and their base stations, their trust to authorities and incivility in using mobile phones: a cross-sectional survey on 2240 high school students in Izmir, Turkey  

PubMed Central

Background Use of mobile phones has rapidly risen among adolescents despite a lack of scientific certainty on their health risks. Risk perception is an important determinant of behavior, and studies on adolescents’ risk perceptions of mobile phones or base stations are very scarce. This study aims to evaluate high school students’ risk perceptions on mobile phones and base stations, their trust to authorities, their opinions regarding incivility while using mobile phones and to assess associated factors. Methods For this cross-sectional study, 2530 students were chosen with stratified cluster sampling among 20,493 high school students studying in Bornova district of Izmir, Turkey, among whom 2240 (88.5%) participated. Risk perceptions and opinions were questioned with a 5-point Likert scale for 24 statements grouped under four dimensions. The mean responses to the four dimensions were categorized as <3.5 (low) and ?3.5 (high) and the determinants were analyzed with logistic regression. Results Mean risk perception scores for the mobile phone, base station, trust to authority and incivility dimensions were 3.69?±?0.89, 4.34?±?0.78, 3.77?±?0.93, 3.16?±?0.93 and the prevalence of high risk perception was 65.1%, 86.7%, 66.2%, 39.7%, respectively. In the mobile phone dimension; students attending industrial technical high school had lower risk perceptions while female students, lower mothers’ education groups and students not using mobile phones (OR?=?2.82, 95% CI?=?1.80-4.40) had higher risk perceptions. In the base station dimension girls had higher risk perceptions (OR?=?1.68, 95% CI?=?1.20-2.37). Girls and students attending industrial technical high school had significantly lower risk perception however 11-12th grade group perceived the risk higher (OR?=?1.45 95% CI?=?1.15-1.84) in the trust to authority dimension. For the incivility dimension, female students (OR?=?1.44, 95% CI?=?1.14-1.82), illiterate/only literate mothers (OR?=?1.79, 95% CI?=?1.04-2.75) and students not using mobile phones (OR?=?2.50, 95% CI?=?1.62-3.87) perceived higher risk. Conclusions Understanding the effects of these determinants might aid in developing more effective educational interventions to specific subgroups on this topic. As debates on the health consequences of electromagnetic fields continue, it would be cautious to approach this issue with a preventive perspective. Efforts should be made to equalize the varying level of knowledge and to ensure that students are informed accurately. PMID:23351724

2013-01-01

216

Mobile visual search.  

E-print Network

??With high-resolution cameras, large storage, high computation power CPU, and fast wireless network connection, mobile phones have evolved into powerful image processing and transmitting devices.… (more)

Sun, Huiguang

2013-01-01

217

Predictors of Social Mobilization Speed  

E-print Network

Mobilization across social networks is becoming increasingly influential, but little is known about what traits of individuals and their relationships affect their speed of mobilization between them. We ran a global social mobilization contest and recorded personal traits of the participants and those they mobilized. We examined how those traits influenced the speed of mobilization. Individuals mobilized faster when they heard about the contest directly from the contest organization, and decreased in speed when hearing from less personal source types (e.g. family vs. media). Mobilization was faster when the mobilizer and the mobilized heard about the contest through the same source type, and slower when both individuals were in different countries. Females mobilized other females faster than males mobilized other males. Mobilization was faster with young recruiters and old recruits, and slower with old recruiters and young recruits. These findings suggest ways to optimize the speed of social mobilization.

Alstott, Jeff; Velu, Chander

2013-01-01

218

Exploring the mobility of mobile phone users  

NASA Astrophysics Data System (ADS)

Mobile phone datasets allow for the analysis of human behavior on an unprecedented scale. The social network, temporal dynamics and mobile behavior of mobile phone users have often been analyzed independently from each other using mobile phone datasets. In this article, we explore the connections between various features of human behavior extracted from a large mobile phone dataset. Our observations are based on the analysis of communication data of 100,000 anonymized and randomly chosen individuals in a dataset of communications in Portugal. We show that clustering and principal component analysis allow for a significant dimension reduction with limited loss of information. The most important features are related to geographical location. In particular, we observe that most people spend most of their time at only a few locations. With the help of clustering methods, we then robustly identify home and office locations and compare the results with official census data. Finally, we analyze the geographic spread of users’ frequent locations and show that commuting distances can be reasonably well explained by a gravity model.

Csáji, Balázs Cs.; Browet, Arnaud; Traag, V. A.; Delvenne, Jean-Charles; Huens, Etienne; Van Dooren, Paul; Smoreda, Zbigniew; Blondel, Vincent D.

2013-03-01

219

Early mobility activities during continuous renal replacement therapy.  

PubMed

Continuous renal replacement therapy (CRRT) is a therapeutic technique used to support critically ill patients with acute renal failure in intensive care units. CRRT is preferred over hemodialysis for patients who cannot tolerate the rapid fluid and electrolyte shifts associated with hemodialysis because of their tenuous hemodynamic state. Traditionally, such patients have not been candidates for mobilization and have remained on strict bed rest. Mobilization is now being initiated on patients undergoing CRRT in intensive care units. This case study chronicles the successful mobilization of a patient undergoing CRRT. This experience suggests that CRRT patients who are appropriate candidates may be mobilized safely and therefore should not automatically be excluded from mobilization therapies. PMID:24986178

Brownback, Cherylynn A; Fletcher, Patricia; Pierce, Lynelle N B; Klaus, Susan

2014-07-01

220

A Survey of Mobile Transactions  

Microsoft Academic Search

Transaction support is crucial in mobile data management. Specific characteristics of mobile environments (e.g. variable bandwidth, disconnections, limited resources on mobile hosts) make traditional transaction management techniques no longer appropriate. Several models for mobile transactions have been proposed but it is difficult to have an overview of all of them. This paper analyzes and compares several contributions to mobile transactions.

Patricia Serrano-alvarado; Claudia Roncancio; Michel E. Adiba

2004-01-01

221

Rapid Prototyping Reconsidered  

ERIC Educational Resources Information Center

Continuing educators need additional strategies for developing new programming that can both reduce the time to market and lower the cost of development. Rapid prototyping, a time-compression technique adapted from the high technology industry, represents one such strategy that merits renewed evaluation. Although in higher education rapid

Desrosier, James

2011-01-01

222

Gifted Rapid Readers.  

ERIC Educational Resources Information Center

A preliminary study is reported which attempted to define gifted rapid readers, authenticate the performances of three subjects who were designated as gifted rapid readers, and explore the relationship of a subject's ability to perceive print eidetically and to read and/or skim. Volunteer subjects were a 15-year-old girl from the Philippines, a…

Schale, Florence

223

Mobile Video in Everyday Social Interactions  

NASA Astrophysics Data System (ADS)

Video recording has become a spontaneous everyday activity for many people, thanks to the video capabilities of modern mobile phones. Internet connectivity of mobile phones enables fluent sharing of captured material even real-time, which makes video an up-and-coming everyday interaction medium. In this article we discuss the effect of the video camera in the social environment, everyday life situations, mainly based on a study where four groups of people used digital video cameras in their normal settings. We also reflect on another study of ours, relating to real-time mobile video communication and discuss future views. The aim of our research is to understand the possibilities in the domain of mobile video. Live and delayed sharing seem to have their special characteristics, live video being used as a virtual window between places whereas delayed video usage has more scope for good-quality content. While this novel way of interacting via mobile video enables new social patterns, it also raises new concerns for privacy and trust between participating persons in all roles, largely due to the widely spreading possibilities of videos. Video in a social situation affects cameramen (who record), targets (who are recorded), passers-by (who are unintentionally in the situation), and the audience (who follow the videos or recording situations) but also the other way around, the participants affect the video by their varying and evolving personal and communicational motivations for recording.

Reponen, Erika; Lehikoinen, Jaakko; Impiö, Jussi

224

Quantitative imaging with a mobile phone microscope.  

PubMed

Use of optical imaging for medical and scientific applications requires accurate quantification of features such as object size, color, and brightness. High pixel density cameras available on modern mobile phones have made photography simple and convenient for consumer applications; however, the camera hardware and software that enables this simplicity can present a barrier to accurate quantification of image data. This issue is exacerbated by automated settings, proprietary image processing algorithms, rapid phone evolution, and the diversity of manufacturers. If mobile phone cameras are to live up to their potential to increase access to healthcare in low-resource settings, limitations of mobile phone-based imaging must be fully understood and addressed with procedures that minimize their effects on image quantification. Here we focus on microscopic optical imaging using a custom mobile phone microscope that is compatible with phones from multiple manufacturers. We demonstrate that quantitative microscopy with micron-scale spatial resolution can be carried out with multiple phones and that image linearity, distortion, and color can be corrected as needed. Using all versions of the iPhone and a selection of Android phones released between 2007 and 2012, we show that phones with greater than 5 MP are capable of nearly diffraction-limited resolution over a broad range of magnifications, including those relevant for single cell imaging. We find that automatic focus, exposure, and color gain standard on mobile phones can degrade image resolution and reduce accuracy of color capture if uncorrected, and we devise procedures to avoid these barriers to quantitative imaging. By accommodating the differences between mobile phone cameras and the scientific cameras, mobile phone microscopes can be reliably used to increase access to quantitative imaging for a variety of medical and scientific applications. PMID:24824072

Skandarajah, Arunan; Reber, Clay D; Switz, Neil A; Fletcher, Daniel A

2014-01-01

225

Mobile Phone Dermatitis in Children and Adults: A Review of the Literature.  

PubMed

Background: Mobile phones have been reported to cause allergic contact dermatitis (ACD). Methods: A comprehensive online literature review was conducted through the National Library of Medicine (Pubmed MEDLINE) using appropriate medical subject headings and keywords. Results: Thirty-seven cases of mobile phone-related ACD were found. Six studies evaluating allergen release from mobile phones were found. Conclusions: Case reports of mobile phone-associated ACD have risen rapidly in number since 2000. Case reports highlight mobile phone ACD in both pediatric and adult populations in many countries. Metal allergens, notably nickel and chromium, were frequently implicated in mobile phone associated ACD. Nickel release from mobile phones appears to be common and has been reported in both cheap and expensive mobile phones, including phones covered under the EU Nickel Directive. PMID:24963454

Richardson, Clare; Hamann, Carsten R; Hamann, Dathan; Thyssen, Jacob P

2014-06-01

226

Human mobility patterns predict divergent epidemic dynamics among cities.  

PubMed

The epidemic dynamics of infectious diseases vary among cities, but it is unclear how this is caused by patterns of infectious contact among individuals. Here, we ask whether systematic differences in human mobility patterns are sufficient to cause inter-city variation in epidemic dynamics for infectious diseases spread by casual contact between hosts. We analyse census data on the mobility patterns of every full-time worker in 48 Canadian cities, finding a power-law relationship between population size and the level of organization in mobility patterns, where in larger cities, a greater fraction of workers travel to work in a few focal locations. Similarly sized cities also vary in the level of organization in their mobility patterns, equivalent on average to the variation expected from a 2.64-fold change in population size. Systematic variation in mobility patterns is sufficient to cause significant differences among cities in infectious disease dynamics-even among cities of the same size-according to an individual-based model of airborne pathogen transmission parametrized with the mobility data. This suggests that differences among cities in host contact patterns are sufficient to drive differences in infectious disease dynamics and provides a framework for testing the effects of host mobility patterns in city-level disease data. PMID:23864593

Dalziel, Benjamin D; Pourbohloul, Babak; Ellner, Stephen P

2013-09-01

227

NetInf Mobile Node Architecture and Mobility Management based on LISP Mobile Node  

E-print Network

NetInf Mobile Node Architecture and Mobility Management based on LISP Mobile Node Muhammad Shoaib an architecture for Network of Information mobile node (NetInf MN). It bears characteristics and features of basic a virtual node layer for mobility management in the Network of Information. Therefore, by adopting

Paris-Sud XI, Université de

228

TIMED Spacecraft Mobile  

NSDL National Science Digital Library

This is a mobile for students to assemble, aimed at enhancing their knowledge of NASA spacecraft and scientific facts Each element of the mobile contains an image and one fact or scientific concept. The cover contains background information about NASA-s TIMED mission, and two language arts exercises to reinforce space science vocabulary.

2001-06-01

229

Mobile Christian - shuttle flight  

NASA Technical Reports Server (NTRS)

Erin Whittle, 14, (seated) and Brianna Johnson, 14, look on as Louis Stork, 13, attempts a simulated landing of a space shuttle at StenniSphere. The young people were part of a group from Mobile Christian School in Mobile, Ala., that visited StenniSphere on April 21.

2009-01-01

230

Mobile Learning Anytime, Anywhere  

ERIC Educational Resources Information Center

Some educational institutions are taking the leap to mobile learning (m-learning) by giving out free iPods. For example, Abilene Christian University gave iPods or iPhones to freshman students and developed 15 Web applications specifically for the mobile devices. The iPod is not the only ubiquitous m-learning device. Any technology that connects…

Hlodan, Oksana

2010-01-01

231

Mobile Augmented Reality Applications  

Microsoft Academic Search

Augmented reality have undergone considerable improvement in past years. Many special techniques and hardware devices were developed, but the crucial breakthrough came with the spread of intelligent mobile phones. This enabled mass spread of augmented reality applications. However mobile devices have limited hardware capabilities, which narrows down the methods usable for scene analysis. In this article we propose an augmented

David Prochazka; Michael Stencl; Ondrej Popelka; Jiri Stastny

2011-01-01

232

Mobile Agents - Smart Messages  

Microsoft Academic Search

Wireless communication with Mobile Computing devices is known to be problematic. It is very different in character from conventional communication over wired networks. Since many distributed applications make assumptions about network characteristics, they may not be used in a hostile mobile environment. We are proposing a new kind of messaging system which incorporates adaptive behaviour into the messages themselves. We

Leon Hurst; Pfidraig Cunningham; Fergal Somers

1997-01-01

233

SantanderMobility Scholarships  

E-print Network

SantanderMobility Scholarships #12;The University of Southampton signed an agreement with Santander Universities in May 2008. As a result of this partnership we have implemented various scholarship schemes for students including a new scholarship for UK students going overseas on exchange and mobility programmes

Anderson, Jim

234

Mobile medical image retrieval  

Microsoft Academic Search

Images are an integral part of medical practice for diagnosis, treatment planning and teaching. Image retrieval has gained in importance mainly as a research domain over the past 20 years. Both textual and visual retrieval of images are essential. In the process of mobile devices becoming reliable and having a functionality equaling that of formerly desktop clients, mobile computing has

Samuel Duc; Adrien Depeursinge; Ivan Eggel; Henning Müller

2011-01-01

235

"Mobile money" services permit  

E-print Network

"Mobile money" services permit cell phone users to send small amounts of money via text message to their friends and relatives. There are over 90 mobile money services in the world today, mainly in emergingTure oF Money october 2012 - April 2013 Muriel Ansley reynolds exhibit GAllery For the full exhibit checklist

Loudon, Catherine

236

Mobile Apps for Librarians  

ERIC Educational Resources Information Center

In an increasing mobile environment, library and reading-related activities often take place on a phone or tablet device. Not only does this mean that library Web sites must keep mobile navigability in mind, but also develop and utilize apps that allow patrons to interact with information and with libraries. While apps do not serve every purpose,…

Power, June L.

2013-01-01

237

Mastering Mobile Security  

ERIC Educational Resources Information Center

Without proper security, mobile devices are easy targets for worms, viruses, and so-called robot ("bot") networks. Hackers increasingly use bot networks to launch massive attacks against eCommerce websites--potentially targeting one's online tuition payment or fundraising/financial development systems. How can one defend his mobile systems against…

Panettieri, Joseph C.

2007-01-01

238

Mobility control agent  

SciTech Connect

Polymer mobility control agents useful in supplemental oil recovery processes, which give improved reciprocal relative mobilities, are prepared by initiating the polymerization of a monomer containing a vinyl group with a catalyst comprising a persulfate and ferrous ammonium sulfate. The vinyl monomer is an acrylyl, a vinyl cyanide, a styryl and water soluble salts thereof.

Argabright, P.A.; Phillips, B.L.; Rhudy, J.S.

1983-05-17

239

Mobile Apps Style Guide  

Cancer.gov

National Cancer Instit?te U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES National Instit?tes of Health NCI Mobile Apps St?le Guide Version 1.0 Table of Contents 2 01. Mobile 01.1 Branding: Iconograph? 01.2 Branding: Logo Usage 01.3 Branding: Backgrounds 01.4

240

Telemedicine by mobile communication  

Microsoft Academic Search

We have proposed some techniques for mobile telemedicine and have verified their practical feasibility in experiments. This article presents technical considerations required to realize a practical mobile telemedicine system, techniques developed for multiple medical data transmission, and the satisfactory results of their applications to telemedicine in moving vehicles

Koichi Shimizu

1999-01-01

241

NISTIR 7617 Mobile Forensic  

E-print Network

NISTIR 7617 Mobile Forensic Reference Materials: AMethodologyandReification WayneJansen AurélienDelaitre i #12;Mobile Forensic Reference Materials: A Methodology and Reification Wayne Jansen Aurélien of forensic tools. It describes an application and data set developed to populate identity modules

242

Extravehicular mobility unit  

NASA Technical Reports Server (NTRS)

The Apollo extravehicular mobility unit (EMU) consisted of a highly mobile, anthropomorphic pressure vessel and a portable life support system. The EMU used for the first lunar landing is described along with the changes made in the EMU design during the program to incorporate the results of experience and to provide new capabilities. The performance of the EMU is discussed.

Carson, M. A.; Rouen, M. N.; Lutz, C. C.; Mcbarron, J. W., II

1975-01-01

243

Deterministic Computations in Time-Varying Graphs: Broadcasting under Unstructured Mobility  

E-print Network

of control messages from O(n2) to O(n), having only one notification per edge of the converge-cast tree. 3 the control messages would increase, but subsequent broad- casts could reuse the tree for dissemination with O is that the existence of these graphs is continuous over time; that is, the network does not suddenly cease forever

Boyer, Edmond

244

Double-smoothing for Varying Coefficient Models  

PubMed Central

Moderation analyses are widely used in biomedical and psychosocial research to investigate differential treatment effects, with moderators frequently identified through testing the significance of the interaction between the predictor and the potential moderator under strong parametric assumptions. Without imposing any parametric forms on how the moderators may affect the relationship between predictors and responses, varying coefficient models address this fundamental problem of strong parametric assumptions with current practice of moderation analysis and provide a much broader class of models for complex moderation relationships. Local polynomial, especially local linear, methods are commonly used in estimating the varying coefficient models. Recently, a double-smoothing (DS) local linear method has been proposed for nonparametric regression models, with nice properties compared to local linear and local cubic methods. In this paper, we generalize DS to varying coefficient models, and show that it holds similar advantages over local linear and local cubic methods. PMID:22121327

Tang, Wan; Zuo, Guoxin; He, Hua

2011-01-01

245

TIME VARYING PARAMETERS IN THE DEMAND FOR HIGH FRUCTOSE CORN SYRUP  

Microsoft Academic Search

Rapid adoption of high fructose corn syrup and the changing demand for HFCS is measured in a time-varying framework. Demand changes are separated into structural and price competitiveness. Tests for parameter stability are made and simulations based on the estimates are used to show the industry dynamics.

Edward A. Evans; Ronald W. Ward; Carlton George Davis

2001-01-01

246

Skylab mobile laboratory  

NASA Technical Reports Server (NTRS)

The Skylab mobile laboratory was designed to provide the capability to obtain necessary data on the Skylab crewmen 30 days before lift-off, within 1 hour after recovery, and until preflight physiological baselines were reattained. The mobile laboratory complex consisted of six laboratories that supported cardiovascular, metabolic, nutrition and endocrinology, operational medicine, blood, and microbiology experiments; a utility package; and two shipping containers. The objectives and equipment requirements of the Skylab mobile laboratory and the data acquisition systems are discussed along with processes such as permanently mounting equipment in the individual laboratories and methods of testing and transporting the units. The operational performance, in terms of amounts of data collected, and the concept of mobile laboratories for medical and scientific experiments are evaluated. The Skylab mobile laboratory succeeded in facilitating the data collection and sample preservation associated with the three Skylab manned flights.

Primeaux, G. R.; Larue, M. A.

1975-01-01

247

Mobility of photosynthetic proteins.  

PubMed

The mobility of photosynthetic proteins represents an important factor that affects light-energy conversion in photosynthesis. The specific feature of photosynthetic proteins mobility can be currently measured in vivo using advanced microscopic methods, such as fluorescence recovery after photobleaching which allows the direct observation of photosynthetic proteins mobility on a single cell level. The heterogeneous organization of thylakoid membrane proteins results in heterogeneity in protein mobility. The thylakoid membrane contains both, protein-crowded compartments with immobile proteins and fluid areas (less crowded by proteins), allowing restricted diffusion of proteins. This heterogeneity represents an optimal balance as protein crowding is necessary for efficient light-energy conversion, and protein mobility plays an important role in the regulation of photosynthesis. The mobility is required for an optimal light-harvesting process (e.g., during state transitions), and also for transport of proteins during their synthesis or repair. Protein crowding is then a key limiting factor of thylakoid membrane protein mobility; the less thylakoid membranes are crowded by proteins, the higher protein mobility is observed. Mobility of photosynthetic proteins outside the thylakoid membrane (lumen and stroma/cytosol) is less understood. Cyanobacterial phycobilisomes attached to the stromal side of the thylakoid can move relatively fast. Therefore, it seems that stroma with their active enzymes of the Calvin-Benson cycle, are a more fluid compartment in comparison to the rather rigid thylakoid lumen. In conclusion, photosynthetic protein diffusion is generally slower in comparison to similarly sized proteins from other eukaryotic membranes or organelles. Mobility of photosynthetic proteins resembles restricted protein diffusion in bacteria, and has been rationalized by high protein crowding similar to that of thylakoids. PMID:23955784

Ka?a, Radek

2013-10-01

248

Aligning product and supply chain strategies in the mobile phone industry  

E-print Network

Designing and managing the supply chain of a company in the mobile phone industry is particularly challenging. Short product lifecycles, rapidly evolving technology, globally linked distribution networks, increasing product ...

Scanlon, Robert (Robert Curtis)

2009-01-01

249

Subcortical amygdala pathways enable rapid face processing  

PubMed Central

Human faces may signal relevant information and are therefore analysed rapidly and effectively by the brain. However, the precise mechanisms and pathways involved in rapid face processing are unclear. One view posits a role for a subcortical connection between early visual sensory regions and the amygdala, while an alternative account emphasises cortical mediation. To adjudicate between these functional architectures, we recorded magnetoencephalographic (MEG) evoked fields in human subjects to presentation of faces with varying emotional valence. Early brain activity was better explained by dynamic causal models containing a direct subcortical connection to the amygdala irrespective of emotional modulation. At longer latencies, models without a subcortical connection had comparable evidence. Hence, our results support the hypothesis that a subcortical pathway to the amygdala plays a role in rapid sensory processing of faces, in particular during early stimulus processing. This finding contributes to an understanding of the amygdala as a behavioural relevance detector. PMID:25108179

Garvert, Mona M.; Friston, Karl J.; Dolan, Raymond J.; Garrido, Marta I.

2014-01-01

250

Subcortical amygdala pathways enable rapid face processing.  

PubMed

Human faces may signal relevant information and are therefore analysed rapidly and effectively by the brain. However, the precise mechanisms and pathways involved in rapid face processing are unclear. One view posits a role for a subcortical connection between early visual sensory regions and the amygdala, while an alternative account emphasises cortical mediation. To adjudicate between these functional architectures, we recorded magnetoencephalographic (MEG) evoked fields in human subjects to presentation of faces with varying emotional valence. Early brain activity was better explained by dynamic causal models containing a direct subcortical connection to the amygdala irrespective of emotional modulation. At longer latencies, models without a subcortical connection had comparable evidence. Hence, our results support the hypothesis that a subcortical pathway to the amygdala plays a role in rapid sensory processing of faces, in particular during early stimulus processing. This finding contributes to an understanding of the amygdala as a behavioural relevance detector. PMID:25108179

Garvert, Mona M; Friston, Karl J; Dolan, Raymond J; Garrido, Marta I

2014-11-15

251

Mobile Perspectives: On Teaching Mobile Literacy  

ERIC Educational Resources Information Center

While recognizing that digital access is not evenly distributed in the United States, which is to say nothing of the global distribution, one can safely say that this transformation is already here; people are already at the moment in which the ability to use social media, and particularly social media as amplified through the power of the mobile

Parry, David

2011-01-01

252

Promoting Function, Independence, and Mobility  

MedlinePLUS

... services, employment, travel, sports, relationships, sexuality and parenting. Share Smaller Text Larger Text Print Mobility and Accessibility Staying Mobile Increasing Accessibility Emotional Adjustment Find an MS Care ...

253

RAPID and DDS  

NASA Technical Reports Server (NTRS)

This talk gives an overview of the the Robot Applications Programmers Interface Delegate (RAPID) as well as the distributed systems middleware Data Distribution Service (DDS). DDS is an open software standard, RAPID is cleared for open-source release under NOSA. RAPID specifies data-structures and semantics for high-level telemetry published by NASA robotic software. These data-structures are supported by multiple robotic platforms at Johnson Space Center (JSC), Jet Propulsion Laboratory (JPL) and Ames Research Center (ARC), providing high-level interoperability between those platforms. DDS is used as the middleware for data transfer. The feature set of the middleware heavily influences the design decision made in the RAPID specification. So it is appropriate to discuss both in this introductory talk.

Utz, Hans Heinrich

2011-01-01

254

System for rapid subtitling  

E-print Network

A system for rapid subtitling of audiovisual sequences was developed, and evaluated. This new system resulted in average time-savings of 50% over the previous work in the field. To subtitle a 27-minute English lecture, ...

Leonard, Sean Joseph

2005-01-01

255

Rapid sampling culture chamber.  

PubMed Central

An all-glass chamber for culturing anaerobic and aerobic bacteria in liquid medium is described. The system permits both rapid sampling and turbidimetric measurements under controlled atmospheric conditions. PMID:350159

Carey, A E; Schroeder, B W

1978-01-01

256

RAPID3? Aptly named!  

PubMed

The RAPID3 score is the sum of three 0-10 patient self-report scores: pain, functional impairment on MDHAQ, and patient global estimate. It requires 5 seconds for scoring and can be used in all rheumatologic conditions, although it has mostly been used in rheumatoid arthritis where cutoffs for low disease activity (<6/30) or high disease activity (>12/30) have been set. A RAPID3 score of ? 3/30 with 1 or 0 swollen joints (RAPID3 ? 3 + ? SJ1) provides remission criteria comparable to Boolean, SDAI, CDAI, and DAS28 remission criteria, in far less time than a formal joint count. RAPID3 performs as well as the DAS28 in separating active drugs from placebos in clinical trials. RAPID3 also predicts subsequent structural disease progression. RAPID3 can be determined at short intervals at home, allowing the determination of the area under the curve of disease activity between two visits and flare detection. However, RAPID3 should not be seen as a substitute for DAS28 and face to face visits in routine care. Monitoring patient status with only self-report information without a rheumatologist's advice (including joints and physical examination, and consideration of imaging and laboratory tests) may indeed be as undesirable for most patients than joint examination without a patient questionnaire. Conversely, combining the RAPID3 and the DAS28 may consist in faster or more sensitive confirmation that a medication is effective. Similarly, better enquiring of most important concerns of patients (pain, functional status and overall opinion on their disorder) should reinforces patients' confidence in their rheumatologist and treatments. PMID:25365094

Berthelot, J-M

2014-01-01

257

Enabling mHealth while assuring compliance: reliable and secure information access in a mobile world.  

PubMed

An increasingly mobile clinical workforce rapidly adopting consumer devices to access mobile, cloud-based applications, complemented by the wide range of mobile storage devices and other portable electronics, such as digital cameras, MP3 players, can make it difficult to efficiently assure compliance without impacting user productivity. This article reviewed a number of healthcare use cases and introduced comprehensive concepts and possible automated solutions to meet the requirements of a highly complex infrastructure of devices accessing confidential information. PMID:23039784

Wirth, Axel

2012-01-01

258

Regularizing cosmological singularities by varying physical constants  

SciTech Connect

Varying physical constant cosmologies were claimed to solve standard cosmological problems such as the horizon, the flatness and the ?-problem. In this paper, we suggest yet another possible application of these theories: solving the singularity problem. By specifying some examples we show that various cosmological singularities may be regularized provided the physical constants evolve in time in an appropriate way.

D?browski, Mariusz P.; Marosek, Konrad, E-mail: mpdabfz@wmf.univ.szczecin.pl, E-mail: k.marosek@wmf.univ.szczecin.pl [Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin (Poland)

2013-02-01

259

Robust COA planning with varying durations  

Microsoft Academic Search

COA (Course of Action) planning involves resource allocation and task scheduling. Traditionally, this problem is tackled with the assumption that task duration is constant and with the objective to minimize the makespan. In contrast to this, this paper assumes task duration can vary in a time interval and the objective is to maximize the RM (Robustness Measure) given the deadline,

Luohao Tang; Cheng Zhu; Weiming Zhang; Zhong Liu

2011-01-01

260

COURBES RATIONNELLES SUR LES VARI Nicolas PERRIN  

E-print Network

cet article, nous #19;etudions le sch#19;ema de Hilbert des courbes rationnelles lisses trac#19;ees sur une vari#19;et#19;e homog#18;ene. Nous montrons que ce sch#19;ema est irr#19;eductible et lisse;equivalence rationnelle de 1-cycle, nous noterons Hom #11; (P 1 ; X) le sch#19;ema des morphismes f de P 1

Perrin, Nicolas

261

Nonlinear deterministic modeling of highly varying loads  

Microsoft Academic Search

Typically, the modeling of highly varying, nonlinear loads such as electric arc furnaces has involved stochastic techniques. This paper presents the use of chaotic dynamics to describe the operation of nonlinear loads. Included is a discussion of the Lyapunov exponents, a measure of chaotic behavior. The alternate approach is applied to electric arc furnaces. A tuning mode is described to

G. T. Heydt; E. J. Kostelich; S. S. Venkate; A. Sundaram

1999-01-01

262

Time-Varying World Market Integration  

Microsoft Academic Search

We propose a measure of capital market integration arising from a conditional regime-switching model. Our measure allows us to describe expected returns in countries that are segmented from world capital markets in one part of the sample and become integrated later in the sample. We find that a number of emerging markets exhibit time-varying integration. Some markets appear more integrated

Geert Bekaert; Campbell R Harvey

1995-01-01

263

Evaluating SuperMusic: streaming context-aware mobile music service  

Microsoft Academic Search

The digital music offering and consumption is rapidly increasing and more and more portable devices are offering music listening capabilities. Mobile network bandwidth is also increasing but streaming the music isn't yet common. Most of the mobile music players still rely on locally stored music. They also lack possibilities to request proper music recommendations from online music catalog. This paper

Arto Lehtiniemi

2008-01-01

264

HIGH PERFORMANCE MOBILE COMPUTING ALGORITHM BASED ON SELF-RANKING ALGORITHM (SAR)  

Microsoft Academic Search

Due to the rapidly increasing usage of the mobile devices attached to the internet, a lot of researches are being conducted to manage and maximize the benefit of such integration. Accordingly, the innovation of this research is to enhance the performance of the scheduling mechanism of the mobile computing environment by distributing some of the functions of the access point

Hesham A. Ali; Tamer Ahmed Farrag

2006-01-01

265

FROM IDEA TO BLAH! UNDERSTANDING MOBILE SERVICES DEVELOPMENT AS INTERACTIVE INNOVATION  

Microsoft Academic Search

Mobile communications are permeating virtually every aspect of our lives. The market is experiencing rapid improvements in technologies, while mobile operators are trying to figure out new ways their infrastructures can provide services to the customers. Furthermore, user-innovation with new ways of using these technologies generate powerful feedback loops back into the innovation processes. In this turbulent environment it is

Fontana Eduardo; Carsten Sřrensen

2005-01-01

266

Sales Communications in a Mobile World: Using the Latest Technology and Retaining the Personal Touch  

ERIC Educational Resources Information Center

Salespeople increasingly have the opportunity to use technology to more quickly communicate with a larger number of clients and customers. Mobile technology, in particular, gives salespeople many advantages in rapidly reaching a large customer base. Furthermore, customers are increasingly employing mobile technology, making them increasingly…

Norris, Daniel T.

2007-01-01

267

Goals and challenges of the DARPA GloMo program [global mobile information systems  

Microsoft Academic Search

Continuing advances in high-speed computation, signal processing, and miniaturization are opening up new opportunities for advancing the state of the art in mobile, wireless, multimedia information systems technologies. Such technologies are critical to meeting the defense requirements for rapidly deployable and robust information systems. The Defense Advanced Research Projects Agency (DARPA) initiated the Global Mobile Information Systems (GloMo) program in

B. M. Leiner; R. J. Ruther; A. R. Sastry

1996-01-01

268

Mobile Cloud Computing: Resource Discovery, Session Connectivity and Other Open Issues  

Microsoft Academic Search

Abstract:Cloud computing can be considered as a model that provides network access to a shared pool of resources, such as storage and computing power, which can be rapidly provisioned and released with minimal management effort. This paper describes a research activity in the area of mobile cloud computing. It highlights different open issues which are associated with the mobile usage

Markus Schüring; Georgios Karagiannis

2011-01-01

269

Using graphics rendering contexts to enhance the real-time video coding for mobile cloud gaming  

Microsoft Academic Search

The emerging cloud gaming service has been growing rapidly, but not yet able to reach mobile customers due to many limitations, such as bandwidth and latency. We introduce a 3D image warping assisted real-time video coding method that can potentially meet all the requirements of mobile cloud gaming. The proposed video encoder selects a set of key frames in the

Shu Shi; Cheng-Hsin Hsu; Klara Nahrstedt; Roy Campbell

2011-01-01

270

Components in time-varying graphs  

NASA Astrophysics Data System (ADS)

Real complex systems are inherently time-varying. Thanks to new communication systems and novel technologies, today it is possible to produce and analyze social and biological networks with detailed information on the time of occurrence and duration of each link. However, standard graph metrics introduced so far in complex network theory are mainly suited for static graphs, i.e., graphs in which the links do not change over time, or graphs built from time-varying systems by aggregating all the links as if they were concurrent in time. In this paper, we extend the notion of connectedness, and the definitions of node and graph components, to the case of time-varying graphs, which are represented as time-ordered sequences of graphs defined over a fixed set of nodes. We show that the problem of finding strongly connected components in a time-varying graph can be mapped into the problem of discovering the maximal-cliques in an opportunely constructed static graph, which we name the affine graph. It is, therefore, an NP-complete problem. As a practical example, we have performed a temporal component analysis of time-varying graphs constructed from three data sets of human interactions. The results show that taking time into account in the definition of graph components allows to capture important features of real systems. In particular, we observe a large variability in the size of node temporal in- and out-components. This is due to intrinsic fluctuations in the activity patterns of individuals, which cannot be detected by static graph analysis.

Nicosia, Vincenzo; Tang, John; Musolesi, Mirco; Russo, Giovanni; Mascolo, Cecilia; Latora, Vito

2012-06-01

271

Mobile Sensing Systems  

PubMed Central

Rich-sensor smart phones have made possible the recent birth of the mobile sensing research area as part of ubiquitous sensing which integrates other areas such as wireless sensor networks and web sensing. There are several types of mobile sensing: individual, participatory, opportunistic, crowd, social, etc. The object of sensing can be people-centered or environment-centered. The sensing domain can be home, urban, vehicular… Currently there are barriers that limit the social acceptance of mobile sensing systems. Examples of social barriers are privacy concerns, restrictive laws in some countries and the absence of economic incentives that might encourage people to participate in a sensing campaign. Several technical barriers are phone energy savings and the variety of sensors and software for their management. Some existing surveys partially tackle the topic of mobile sensing systems. Published papers theoretically or partially solve the above barriers. We complete the above surveys with new works, review the barriers of mobile sensing systems and propose some ideas for efficiently implementing sensing, fusion, learning, security, privacy and energy saving for any type of mobile sensing system, and propose several realistic research challenges. The main objective is to reduce the learning curve in mobile sensing systems where the complexity is very high. PMID:24351637

Macias, Elsa; Suarez, Alvaro; Lloret, Jaime

2013-01-01

272

Mobile sensing systems.  

PubMed

Rich-sensor smart phones have made possible the recent birth of the mobile sensing research area as part of ubiquitous sensing which integrates other areas such as wireless sensor networks and web sensing. There are several types of mobile sensing: individual, participatory, opportunistic, crowd, social, etc. The object of sensing can be people-centered or environment-centered. The sensing domain can be home, urban, vehicular… Currently there are barriers that limit the social acceptance of mobile sensing systems. Examples of social barriers are privacy concerns, restrictive laws in some countries and the absence of economic incentives that might encourage people to participate in a sensing campaign. Several technical barriers are phone energy savings and the variety of sensors and software for their management. Some existing surveys partially tackle the topic of mobile sensing systems. Published papers theoretically or partially solve the above barriers. We complete the above surveys with new works, review the barriers of mobile sensing systems and propose some ideas for efficiently implementing sensing, fusion, learning, security, privacy and energy saving for any type of mobile sensing system, and propose several realistic research challenges. The main objective is to reduce the learning curve in mobile sensing systems where the complexity is very high. PMID:24351637

Macias, Elsa; Suarez, Alvaro; Lloret, Jaime

2013-01-01

273

Limits of social mobilization.  

PubMed

The Internet and social media have enabled the mobilization of large crowds to achieve time-critical feats, ranging from mapping crises in real time, to organizing mass rallies, to conducting search-and-rescue operations over large geographies. Despite significant success, selection bias may lead to inflated expectations of the efficacy of social mobilization for these tasks. What are the limits of social mobilization, and how reliable is it in operating at these limits? We build on recent results on the spatiotemporal structure of social and information networks to elucidate the constraints they pose on social mobilization. We use the DARPA Network Challenge as our working scenario, in which social media were used to locate 10 balloons across the United States. We conduct high-resolution simulations for referral-based crowdsourcing and obtain a statistical characterization of the population recruited, geography covered, and time to completion. Our results demonstrate that the outcome is plausible without the presence of mass media but lies at the limit of what time-critical social mobilization can achieve. Success relies critically on highly connected individuals willing to mobilize people in distant locations, overcoming the local trapping of diffusion in highly dense areas. However, even under these highly favorable conditions, the risk of unsuccessful search remains significant. These findings have implications for the design of better incentive schemes for social mobilization. They also call for caution in estimating the reliability of this capability. PMID:23576719

Rutherford, Alex; Cebrian, Manuel; Dsouza, Sohan; Moro, Esteban; Pentland, Alex; Rahwan, Iyad

2013-04-16

274

Limits of social mobilization  

PubMed Central

The Internet and social media have enabled the mobilization of large crowds to achieve time-critical feats, ranging from mapping crises in real time, to organizing mass rallies, to conducting search-and-rescue operations over large geographies. Despite significant success, selection bias may lead to inflated expectations of the efficacy of social mobilization for these tasks. What are the limits of social mobilization, and how reliable is it in operating at these limits? We build on recent results on the spatiotemporal structure of social and information networks to elucidate the constraints they pose on social mobilization. We use the DARPA Network Challenge as our working scenario, in which social media were used to locate 10 balloons across the United States. We conduct high-resolution simulations for referral-based crowdsourcing and obtain a statistical characterization of the population recruited, geography covered, and time to completion. Our results demonstrate that the outcome is plausible without the presence of mass media but lies at the limit of what time-critical social mobilization can achieve. Success relies critically on highly connected individuals willing to mobilize people in distant locations, overcoming the local trapping of diffusion in highly dense areas. However, even under these highly favorable conditions, the risk of unsuccessful search remains significant. These findings have implications for the design of better incentive schemes for social mobilization. They also call for caution in estimating the reliability of this capability. PMID:23576719

Rutherford, Alex; Cebrian, Manuel; Dsouza, Sohan; Moro, Esteban; Pentland, Alex; Rahwan, Iyad

2013-01-01

275

Conformation dependence of DNA electrophoretic mobility in a converging channel.  

PubMed

The electrophoresis of lambda-DNA is observed in a microscale converging channel where the center-of-masses trajectories of DNA molecules are tracked to measure instantaneous electrophoretic (EP) mobilities of DNA molecules of various stretch lengths and conformations. Contrary to the usual assumption that DNA mobility is a constant, independent of field and DNA length in free solution, we find DNA EP mobility varies along the axis in the contracting geometry. We correlate this mobility variation with the local stretch and conformational changes of the DNA, which are induced by the electric field gradient produced by the contraction. A "shish-kebab" model of a rigid polymer segment is developed, which consists of aligned spheres acting as charge and drag centers. The EP mobility of the shish-kebab is obtained by determining the electrohydrodynamic interactions of aligned spheres driven by the electric field. Multiple shish-kebabs are then connected end-to-end to form a freely jointed chain model for a flexible DNA chain. DNA EP mobility is finally obtained as an ensemble average over the shish-kebab orientations that are biased to match the overall stretch of the DNA chain. Using physically reasonable parameters, the model agrees well with experimental results for the dependence of EP mobility on stretch and conformation. We find that the magnitude of the EP mobility increases with DNA stretch, and that this increase is more pronounced for folded conformations. PMID:20737448

Liao, Wei-Ching; Watari, Nobuhiko; Wang, Shengnian; Hu, Xin; Larson, Ronald G; Lee, Ly James

2010-08-01

276

Robust Visualization of Navigation Experiments with Mobile Robots over the Internet  

E-print Network

Robust Visualization of Navigation Experiments with Mobile Robots over the Internet Dirk Schulz y­947, Kyongju, Korea 1999 Abstract Visualization is an important precondition for success­ ful tele­operation of instructable mobile robots. Data con­ nections with varying and limited bandwidth such as the Internet, however

Burgard, Wolfram

277

SPECIATION, MOBILITY AND FATE OF ACTINIDES IN THE GROUNDWATER AT THE HANFORD SITE  

EPA Science Inventory

Plutonium mobility varies depending upon source and ambient geochemistry. Some forms may be significantly more mobile than standard models predict. Because of this variability, the first step in safe remediation and contaminant management in the groundwater/vadose zone is to meas...

278

A foundation for tool based mobility support for visually impaired web users  

Microsoft Academic Search

Users make journeys through the Web. Web travel encompasses the tasks of orientation and navigation, the environment and the purpose of the journey. The ease of travel, its mobility, varies from page to page and site to site. For visually impaired users, in particular, mobility is reduced; the objects that support travel are inaccessible or missing altogether. Web development tools

Yeliz Yesilada; Robert Stevens; Carole A. Goble

2003-01-01

279

Energy-Accuracy Aware Localization for Mobile Devices University of California San Diego  

E-print Network

Energy-Accuracy Aware Localization for Mobile Devices Kaisen Lin University of California San Diego that the required location accuracy varies with location, and hence lower energy and lower ac- curacy localization automatically determines the dynamic accuracy re- quirement for mobile search-based applications. As the user

Zhao, Feng

280

Measuring and modeling mobile phone charger energy consumption and environmental impact  

Microsoft Academic Search

This paper studies the electricity consumption of mobile phone chargers. The charger's electricity consumption varies depending on its state. We measured the electricity consumption of various phone and charger models in different states. We also did panel studies on the recharging behavior of smartphone users. Based on these and other sources, we are able to estimate mobile phone recharging electricity

Mikko V. J. Heikkinen; Jukka K. Nurminen

2012-01-01

281

Mobile Learning Initiative (MLI) Spring 2012 Mobile Learning Campus Climate  

E-print Network

Page | 1 Mobile Learning Initiative (MLI) Spring 2012 Mobile Learning Campus Climate Assessment.............................................................................................................................. 30 A. Demographics of 2012 Faculty Mobile Computing Survey Respondents B. Demographics of 2011 and 2012 Student Mobile Computing Survey Respondents C. Example Faculty Comments from Open-Ended Feedback D

Barrash, Warren

282

Mobility-Induced Service Migration in Mobile Micro-Clouds  

E-print Network

.zafer.us@ieee.org, §kevin.s.chan.civ@mail.mil Abstract--Mobile micro-cloud is an emerging technology in distributed. Index Terms--Cloud computing, Markov decision process (MDP), mobile micro-cloud, mobility, service service to users within its coverage. Applications of the mobile micro-cloud include data and computation

Leung, Kin K.

283

MMPS: A Versatile Mobile-to-Mobile Payment System  

Microsoft Academic Search

The paper presents an effective mobile-to-mobile payment system. A mobile phone with or without SIM card is enabled as an EMV payment instrument and is linked to a debit or credit account in a bank to pay merchant who has a mobile phone or an online EMV capable terminal. In a single phone, multiple credit or debit accounts from different

Ashutosh Saxena; Manik Lal Das; Anurag Gupta

2005-01-01

284

76 FR 24051 - In the Matter of Certain Electronic Devices, Including Mobile Phones, Mobile Tablets, Portable...  

Federal Register 2010, 2011, 2012, 2013

...Mobile Phones, Mobile Tablets, Portable Music Players, and Computers, and Components...mobile phones, mobile tablets, portable music players, and computers, and components...mobile phones, mobile tablets, portable music players, and computers, and...

2011-04-29

285

A Survey of Mobile Robots for Distribution Power Line Inspection  

Microsoft Academic Search

The purpose of this paper is to present the most important achievements in the field of distribution power line inspection by mobile robots. Stimulated by the need for fast, accurate, safe and low-cost power line inspection, which would increase the quality of power delivery, the field of automated power line inspection has witnessed rapid development over the last decade. This

Jaka Katrasnik; Franjo Pernus

2010-01-01

286

Deposition and mobilization of clay colloids in unsaturated porous media  

E-print Network

on the deposition and mobilization of colloid-sized clay particles within unsaturated sand columns. The deposition rates of illite under steady-flow conditions were essentially independent of pH, while the deposition rapid colloid release. A model that accounts for rate-limited deposition reactions and that links

Saiers, James

287

Hydraulics in oil drilling from offshore mobile platforms  

Microsoft Academic Search

Because of the requirement for rapid operation of subsea safety equipment when drilling from offshore mobile platforms, special hydraulic equipment is required. This paper discusses the features of hydraulic control systems used for operation of subsea blowout preventer equipment from offshore floating drilling rigs. Special features of the hydraulic equipment are discussed along with specific requirements which influence component designs

1982-01-01

288

Universities and Libraries Move to the Mobile Web  

ERIC Educational Resources Information Center

The convergence of web-enabled smartphones, the applications designed for smartphone interfaces, and cloud computing is rapidly changing how people interact with each other and with their environments. The commercial sector has taken the lead in creating mobile websites that leverage the capacities of smartphones, and the academic community has…

Aldrich, Alan W.

2010-01-01

289

MMM2: mobile media metadata for photo sharing  

Microsoft Academic Search

Though cameraphones are rapidly becoming the dominant platform for consumer digital photography, users still face difficulties in transferring, managing, and sharing photos captured with cameraphones. The Mobile Media Metadata 2 (MMM2) system removes the difficulty in transferring photos from the device by providing an automatic upload capability and uses metadata about the context in which a photo was captured to

Shane Ahern; Simon King; Marc Davis

2005-01-01

290

Nonlinear deterministic modeling of highly varying loads  

SciTech Connect

Typically, the modeling of highly varying, nonlinear loads such as electric arc furnaces has involved stochastic techniques. This paper presents the use of chaotic dynamics to describe the operation of nonlinear loads. Included is a discussion of the Lyapunov exponents, a measure of chaotic behavior. The alternate approach is applied to electric arc furnaces. A tuning mode is described to develop the parameters of a chaotic model. This model is trained to have time and frequency responses that are tuned to match the current from the arc furnace under study. The simulated data are compared to actual arc furnace data to validate the model. This model is used to assess the impact of various highly varying nonlinear loads that exhibit chaos in power systems.

O`Neill-Carrillo, E.; Heydt, G.T.; Kostelich, E.J. [Arizona State Univ., Tempe, AZ (United States)] [Arizona State Univ., Tempe, AZ (United States); Venkate, S.S. [Iowa State Univ., Ames, IA (United States)] [Iowa State Univ., Ames, IA (United States); Sundaram, A. [EPRI, Palo Alto, CA (United States)] [EPRI, Palo Alto, CA (United States)

1999-04-01

291

Adapting End Host Congestion Control for Mobility  

NASA Technical Reports Server (NTRS)

Network layer mobility allows transport protocols to maintain connection state, despite changes in a node's physical location and point of network connectivity. However, some congestion-controlled transport protocols are not designed to deal with these rapid and potentially significant path changes. In this paper we demonstrate several distinct problems that mobility-induced path changes can create for TCP performance. Our premise is that mobility events indicate path changes that require re-initialization of congestion control state at both connection end points. We present the application of this idea to TCP in the form of a simple solution (the Lightweight Mobility Detection and Response algorithm, that has been proposed in the IETF), and examine its effectiveness. In general, we find that the deficiencies presented are both relatively easily and painlessly fixed using this solution. We also find that this solution has the counter-intuitive property of being both more friendly to competing traffic, and simultaneously more aggressive in utilizing newly available capacity than unmodified TCP.

Eddy, Wesley M.; Swami, Yogesh P.

2005-01-01

292

Secure Mobile IP Communication  

E-print Network

Universität Bern Vorgelegt von: Marc Danzeisen Leiter der Arbeit: Prof. Dr. Torsten Braun Forschungsgruppe networking, Sun Microsystems, Inc. 29 5.4 Comparison of the different concepts 31 6 SECMIP: A SECURED MOBILE

Braun, Torsten

293

Mobile Computation with Functions   

E-print Network

The practice of computing has reached a stage where computers are seen as parts of a global computing platform. The possibility of exploiting resources on a global scale has given rise to a new paradigm -- the mobile computation paradigm...

K?rl?, Zeliha D

294

EcoMOBILE  

NSDL National Science Digital Library

If you're not scared off by the acronym, the Ecosystems Mobile Outdoor Blended Immersive Learning Environment (EcoMOBILE) is a fabulous learning device. Developed at the Harvard Graduate School of Education with funding from the Institute of Education Sciences, EcoMOBILE is a fairly remarkable initiative that allows students to explore a virtual pond and extend their learning through one or more field trips to a local pond environment. Students can access and collect information and clues about the virtual environment via a mobile device. Then, students can extend their learning to the real world by using environmental probes that allow collection of real-time data. On the site, visitors can learn about the application via a short video, project data, and information about the primary investigators.

295

Contextualizing urban mobile fabrics  

E-print Network

This thesis is focus on the urban fabric issues. To be more specific, I will focus on the "Mobile Fabrics" within the larger Asian urban context. Instead of working with a specific geographical site; I will focus on the ...

Lin, Michael Chia-Liang

2007-01-01

296

Build Your Own Mobile  

NSDL National Science Digital Library

Student teams creatively construct mobiles using hangers and assorted materials and objects while exploring the principles of balance and center of mass. They build complex, free-hanging structures by balancing pieces with different lengths, weights, shapes and sizes.

Center For Engineering Educational Outreach

297

Persuasive Mobile Health Applications  

NASA Astrophysics Data System (ADS)

With many industrialized societies bearing the cost of an increasingly sedentary lifestyle on the health of their populations there is a need to find new ways of encouraging physical activity to promote better health and well being. With the increasing power of mobile phones and the recent emergence of personal heart rate monitors, aimed at dedicated amateur runners, there is now a possibility to develop “Persuasive Mobile Health Applications” to promote well being through the use of real-time physiological data and persuade users to adopt a healthier lifestyle. In this paper we present a novel general health monitoring software for mobile phones called Heart Angel. This software is aimed at helping users monitor, record, as well as improve their fitness level through built-in cardio-respiratory tests, a location tracking application for analyzing heart rate exertion over time and location, and a fun mobile-exergame called Health Defender.

Garcia Wylie, Carlos; Coulton, Paul

298

Understanding Mobile Apps  

MedlinePLUS

... steps to secure the network . Why are some apps free? Some apps are distributed for free through app stores; the ... a few on the market, including some with free versions. Mobile App User Reviews Can I trust all the user ...

299

AUSSAT mobile satellite services  

NASA Technical Reports Server (NTRS)

An overview of AUSSAT's planned mobile satellite system is given. The development program which is being undertaken to achieve the 1992 service date is described. Both business and technical aspects of the development program are addressed.

Nowland, Wayne L.; Wagg, Michael; Simpson, Daniel

1988-01-01

300

A Mobile Robot Project  

E-print Network

We are building a mobile robot which will roam around the AI lab observing and later perhaps doing. Our approach to building the robot and its controlling software differs from that used in many other projects in a number ...

Brooks, Rodney A.

301

Soliton interaction with slowly varying potentials  

E-print Network

We study the Gross-Pitaevskii equation with a slowly varying smooth potential, $V(x) = W(hx)$. We show that up to time $\\log(1/h)/h $ and errors of size $h^2$ in $H^1$, the solution is a soliton evolving according to the classical dynamics of a natural effective Hamiltonian, $ (\\xi^2 + \\sech^2 * V (x))/2 $. This provides an improvement ($ h \\to h^2 $) compared to previous works, and is strikingly confirmed by numerical simulations.

Justin Holmer; Maciej Zworski

2007-09-24

302

Mobile Communications May 30, 2013  

E-print Network

Mobile Communications Program May 30, 2013 #12;Overview Background Financial Aspects Operational plans include mobile-mobile, nights & weekends Smartphones ­ 400 minute plan, includes unlimited data.98/month Unlimited text messaging can be added for $12/month Unlimited data for mobile broadband card

303

Serum Sclerostin Levels Vary With Season  

PubMed Central

Context: To establish the clinical utility of serum sclerostin levels, it is important to know whether there is seasonal variation in the measurements. Objective: This study was done to determine whether serum sclerostin levels vary by season in healthy older men and women. Methods: Serum sclerostin levels were measured in archived serum of 314 healthy men and women aged 65 years and older and examined for seasonal variation. Several factors known to vary by season and previously reported to be associated with serum sclerostin levels, including serum osteocalcin, physical activity, and serum PTH levels, were also measured in these subjects. Sex did not modify the association of season with sclerostin, so the men and women were analyzed together. Results: Serum sclerostin levels varied significantly by season (P < .001, after adjustment for sex). Sclerostin levels in the wintertime were 20% higher than the all-year mean, the levels gradually declined through the spring and summer, and by the fall, they were 20% below the all-year mean. Adjustment for serum osteocalcin, physical activity, and serum PTH did not alter the seasonal means. Seasonal differences in serum osteocalcin, physical activity, and serum PTH were not statistically significant. Conclusions: This study documents marked seasonal variation in serum sclerostin levels. It is important to recognize this source of biological variability when considering the potential clinical utility of sclerostin measurements. PMID:24248178

Harris, Susan S.; Ceglia, Lisa; Palermo, Nancy J.

2014-01-01

304

Adaptive, template moderated, spatially varying statistical classification.  

PubMed

A novel image segmentation algorithm was developed to allow the automatic segmentation of both normal and abnormal anatomy from medical images. The new algorithm is a form of spatially varying statistical classification, in which an explicit anatomical template is used to moderate the segmentation obtained by statistical classification. The algorithm consists of an iterated sequence of spatially varying classification and nonlinear registration, which forms an adaptive, template moderated (ATM), spatially varying statistical classification (SVC). Classification methods and nonlinear registration methods are often complementary, both in the tasks where they succeed and in the tasks where they fail. By integrating these approaches the new algorithm avoids many of the disadvantages of each approach alone while exploiting the combination. The ATM SVC algorithm was applied to several segmentation problems, involving different image contrast mechanisms and different locations in the body. Segmentation and validation experiments were carried out for problems involving the quantification of normal anatomy (MRI of brains of neonates) and pathology of various types (MRI of patients with multiple sclerosis, MRI of patients with brain tumors, MRI of patients with damaged knee cartilage). In each case, the ATM SVC algorithm provided a better segmentation than statistical classification or elastic matching alone. PMID:10972320

Warfield, S K; Kaus, M; Jolesz, F A; Kikinis, R

2000-03-01

305

Tuning the lateral mobility of thin block copolymer films  

NASA Astrophysics Data System (ADS)

Polymer mobility in confined environments is of both theoretical and practical interest. The controlled formation and characterization of systems where such effects can be studied remain active areas of investigation. In this work, we created ultrathin (< 50 nm) supported films of amphiphilic polybutylene-poly(ethylene) oxide diblock copolymers, through Langmuir-Blodgett and Langmuir-Schaefer techniques. To adjust the lateral mobility of these ultrathin films, short polyisobutylene homopolymer was introduced during the film assembly process. Preliminary fluorescence recovery after photobleaching (FRAP) results show that the lateral mobility of the block copolymers is proportional to the logarithm of homopolymer concentration. The mobility can be varied by up to a factor of 8 with as little as 1 mol% of homopolymer. The role of the added homopolymer on the block copolymer lateral mobility is likely to be related with several features such as chain entanglements, interfacial constraints, and interlayer friction. By varying the concentration and the molecular weight of the homopolymer introduced into the films, we attempt to explain the underlying physical mechanisms that are responsible for changes in lateral mobility.

Bermudez, Harry; Kourouklis, Andreas

2013-03-01

306

Mobile Uninterruptible Power Supply  

NASA Technical Reports Server (NTRS)

Proposed mobile unit provides 20 kVA of uninterruptible power. Used with mobile secondary power-distribution centers to provide power to test equipment with minimal cabling, hazards, and obstacles. Wheeled close to test equipment and system being tested so only short cable connections needed. Quickly moved and set up in new location. Uninterruptible power supply intended for tests which data lost or equipment damaged during even transient power failure.

Mears, Robert L.

1990-01-01

307

Mobile multiple access study  

NASA Technical Reports Server (NTRS)

Multiple access techniques (FDMA, CDMA, TDMA) for the mobile user and attempts to identify the current best technique are discussed. Traffic loading is considered as well as voice and data modulation and spacecraft and system design. Emphasis is placed on developing mobile terminal cost estimates for the selected design. In addition, design examples are presented for the alternative techniques of multiple access in order to compare with the selected technique.

1977-01-01

308

Mobile Christian - shuttle flight  

NASA Technical Reports Server (NTRS)

Louis Stork, 13, and Erin Whittle, 14, look on as Brianna Johnson, 14, conducts a 'test' of a space shuttle main engine in the Test Control Center exhibit in StenniSphere, the visitor center at NASA's John C. Stennis Space Center near Bay St. Louis, Miss. The young people were part of a group from Mobile Christian School in Mobile, Ala., that visited StenniSphere on April 21.

2009-01-01

309

Autonomous Mobile Networks  

Microsoft Academic Search

Summary form only given, as follows. Autonomous mobile networks are distributed ad-hoc networks of nodes that can sense, actuate, compute and communicate with each other using point-to-point multi-hop communication. The nodes in such networks include static sensors, mobile sensors, robots, and humans. Such systems combine the most advanced concepts in perception, communication and control to create computational systems capable of

Daniela Rus

2004-01-01

310

The Boxes Go Mobile  

NSDL National Science Digital Library

To display the results from the previous activity, each student designs and constructs a mobile that contains a duplicate of his or her original box, the new cube-shaped box of the same volume, the scraps that are left over from the original box, and pertinent calculations of the volumes and surface areas involved. They problem solve and apply their understanding of see-saws and lever systems to create balanced mobiles.

Engineering K-Phd Program

311

Assured Access/Mobile Computing Initiatives on Five University Campuses.  

ERIC Educational Resources Information Center

Mobile computing and assured access are becoming popular terms to describe a growing number of university programs which take advantage of ubiquitous network access points and the portability of notebook computers to ensure all students have access to digital tools and resources. However, the implementation of such programs varies widely from…

Blurton, Craig; Chee, Yam San; Long, Phillip D.; Resmer, Mark; Runde, Craig

312

State-Controlled Licensure and Interstate Mobility: Questions from Katrina  

ERIC Educational Resources Information Center

State licensure laws in speech-language pathology and audiology vary from state to state. Natural disaster displacements as well as trends in job mobility have increased the need for licensees to be able to have more fluidity in practicing from 1 state to another. Additionally, literature reviews on the history of professional licensure…

Taylor, Carmen L.

2006-01-01

313

Modeling and control of formations of nonholonomic mobile robots  

Microsoft Academic Search

This paper addresses the control of a team of nonholonomic mobile robots navigating in a terrain with obstacles while maintaining a desired formation and changing formations when required, using graph theory. We model the team as a triple, , consisting of a group ele- ment that describes the gross position of the lead robot, a set of shape vari- ables

Jaydev P. Desai; James P. Ostrowski; Vijay Kumar

2001-01-01

314

Enhancing Health and Social Care Placement Learning through Mobile Technology  

ERIC Educational Resources Information Center

Health and social care students spend up to 50% of their course in practice. Placements are distributed across a wide geographical area and have varying degrees of IT access and support. Consequently, students may feel isolated from peers, academic staff, and resources required for effective learning. Mobile technology has considerable potential…

Lea, Susan; Callaghan, Lynne

2011-01-01

315

Making It in America: Social Mobility in the Immigrant Population  

ERIC Educational Resources Information Center

In his survey of research on social mobility and U.S. immigration, George Borjas underscores two insights. First, most immigrants are at a sizable earnings disadvantage, relative to nativeborn workers. Second, the earnings of different groups of immigrants vary widely. The children of immigrants "catch up" to native-born workers slowly.…

Borjas, George J.

2006-01-01

316

MODELING RELATIONSHIPS BETWEEN MOBILE SOURCE PARTICLE EMISSIONS AND POPULATION EXPOSURES  

EPA Science Inventory

Results from this analysis were recently published (Greco, et al., 2007b). For primary fine particulate matter emitted from mobile sources, the intake fractions varied across source counties from 0.14 to 23 per million (median of 1.2 per million). These values were highly...

317

Rapid Prototyping Home Page  

NSDL National Science Digital Library

This resource provides the latest developments in the fast paced field of rapid prototyping. What is rapid prototyping? Rapid prototyping takes virtual designs from computer aided design (CAD) or animation modeling software, transforms them into thin, virtual, horizontal cross-sections and then creates each cross-section in physical space, one after the next until the model is finished. It is a "WYSIWYG" process where the virtual model and the physical model correspond almost identically. With additive fabrication, the machine reads in data from a CAD drawing and lays down successive layers of liquid, powder, or sheet material, and in this way builds up the model from a series of cross sections. These layers, which correspond to the virtual cross section from the CAD model, are joined together or fused automatically to create the final shape. The primary advantage to additive fabrication is its ability to create almost any shape or geometric feature. This site has a great list of links.

2009-07-15

318

Synthesis of a series of monosaccharide-fipronil conjugates and their phloem mobility.  

PubMed

To test the effect of adding different monosaccharide groups to a non-phloem-mobile insecticide on the phloem mobility of the insecticide, a series of conjugates of different monosaccharides and fipronil were synthesized using the trichloroacetimidate method. Phloem mobility tests in castor bean ( Ricinus communis L.) seedlings indicated that the phloem mobility of these conjugates varied markedly. L-Rhamnose-fipronil and D-fucose-fipronil displayed the highest phloem mobility among all of the tested conjugates. Conjugating hexose, pentose, or deoxysugar to fipronil through an O-glycosidic linkage can confer phloem mobility to fipronil in R. communis L. effectively, while the -OH orientation of the monosaccharide substantially affected the phloem mobility of the conjugates. PMID:23586601

Yuan, Jian-Guo; Wu, Han-Xiang; Lu, Meng-Ling; Song, Gao-Peng; Xu, Han-Hong

2013-05-01

319

Rapid road repair vehicle  

DOEpatents

Disclosed are improvments to a rapid road repair vehicle comprising an improved cleaning device arrangement, two dispensing arrays for filling defects more rapidly and efficiently, an array of pre-heaters to heat the road way surface in order to help the repair material better bond to the repaired surface, a means for detecting, measuring, and computing the number, location and volume of each of the detected surface imperfection, and a computer means schema for controlling the operation of the plurality of vehicle subsystems. The improved vehicle is, therefore, better able to perform its intended function of filling surface imperfections while moving over those surfaces at near normal traffic speeds.

Mara, Leo M. (Livermore, CA)

1999-01-01

320

Rapid small lot manufacturing  

SciTech Connect

The direct connection of information, captured in forms such as CAD databases, to the factory floor is enabling a revolution in manufacturing. Rapid response to very dynamic market conditions is becoming the norm rather than the exception. In order to provide economical rapid fabrication of small numbers of variable products, one must design with manufacturing constraints in mind. In addition, flexible manufacturing systems must be programmed automatically to reduce the time for product change over in the factory and eliminate human errors. Sensor based machine control is needed to adapt idealized, model based machine programs to uncontrolled variables such as the condition of raw materials and fabrication tolerances.

Harrigan, R.W.

1998-05-09

321

Extensible Hardware Architecture for Mobile Robots  

NASA Technical Reports Server (NTRS)

The Intelligent Robotics Group at NASA Ames Research Center has developed a new mobile robot hardware architecture designed for extensibility and reconfigurability. Currently implemented on the k9 rover. and won to be integrated onto the K10 series of human-robot collaboration research robots, this architecture allows for rapid changes in instrumentation configuration and provides a high degree of modularity through a synergistic mix of off-the-shelf and custom designed components, allowing eased transplantation into a wide vane6 of mobile robot platforms. A component level overview of this architecture is presented along with a description of the changes required for implementation on K10 , followed by plans for future work.

Park, Eric; Kobayashi, Linda; Lee, Susan Y.

2005-01-01

322

MOBILIZED BY MOBILE MEDIA HOW CHINESE PEOPLE USE MOBILE PHONES TO CHANGE  

E-print Network

MOBILIZED BY MOBILE MEDIA HOW CHINESE PEOPLE USE MOBILE PHONES TO CHANGE POLITICS AND DEMOCRACY Jun of "guanxi-embedded mobile social network"; to Toke Nordbo from the PhD school at the Faculty of Humanities at the Department of Media, Cognition and Communication in University of Copenhagen. I am indebted to both

Paris-Sud XI, Université de

323

Content-dependent block noise reduction for mobile displays  

NASA Astrophysics Data System (ADS)

Number of pixels on mobile displays is rapidly increasing. Recently, mobile displays with more than one million pixels have been introduced into markets. However, most of multimedia contents to be displayed on mobile displays have much smaller pixel counts. For example, number of pixels for a T-DMB(terrestrial digital multimedia broadcasting) sequence is 320x240. When enlargement is applied to input sequence, perceived image quality would be degraded. Increase in visibility of block noise is one of the major reasons for image quality degradation on mobile displays. This paper presents a simple and computationally efficient method to reduce visibility of block noise on enlarged multimedia sequences. In proposed method, a simple low pass filtering is selectively applied to the pixels of block noises for reduction of block noise visibility as well as faithful reproduction of image details.

Kim, Ga-Hee; Lee, Yoon-Gyoo; Kim, Han-Eol; Kim, Choon-Woo

2012-01-01

324

Mobility of icy sand packs, with application to Martian permafrost  

NASA Astrophysics Data System (ADS)

The physical state of water on Mars has fundamental ramifications for both climatology and astrobiology. The widespread presence of “softened” Martian landforms (such as impact craters) can be attributed to viscous creep of subsurface ground ice. We present laboratory experiments designed to determine the minimum amount of ice necessary to mobilize topography within Martian permafrost. Our results show that the jammed-to-mobile transition of icy sand packs neither occurs at fixed ice content nor is dependent on temperature or stress, but instead correlates strongly with the maximum dry packing density of the sand component. Viscosity also changes rapidly near the mobility transition. The results suggest a potentially lower minimum volatile inventory for the impact-pulverized megaregolith of Mars. Furthermore, the long-term preservation of partially relaxed craters implies that the ice content of Martian permafrost has remained close to that at the mobility transition throughout Martian history.

Durham, William B.; Pathare, Asmin V.; Stern, Laura A.; Lenferink, Hendrik J.

2009-12-01

325

Rapid Prototyping in PVS  

NASA Technical Reports Server (NTRS)

PVSio is a conservative extension to the PVS prelude library that provides basic input/output capabilities to the PVS ground evaluator. It supports rapid prototyping in PVS by enhancing the specification language with built-in constructs for string manipulation, floating point arithmetic, and input/output operations.

Munoz, Cesar A.; Butler, Ricky (Technical Monitor)

2003-01-01

326

AFRPL Rapid Indexing System.  

ERIC Educational Resources Information Center

A modified Keyword Out of Context (KWOC) system was developed to gain rapid control over more than 8,000 scattered, unindexed documents. This was the first step in providing the technical information support required by Air Force Rocket Propulsion Laboratory scientists and engineers. Implementation of the KWOC system, computer routines, and…

Beltran, Alfred A.

327

Linear Parameter Varying Control for Actuator Failure  

NASA Technical Reports Server (NTRS)

A robust linear parameter varying (LPV) control synthesis is carried out for an HiMAT vehicle subject to loss of control effectiveness. The scheduling parameter is selected to be a function of the estimates of the control effectiveness factors. The estimates are provided on-line by a two-stage Kalman estimator. The inherent conservatism of the LPV design is reducing through the use of a scaling factor on the uncertainty block that represents the estimation errors of the effectiveness factors. Simulations of the controlled system with the on-line estimator show that a superior fault-tolerance can be achieved.

Shin, Jong-Yeob; Wu, N. Eva; Belcastro, Christine; Bushnell, Dennis M. (Technical Monitor)

2002-01-01

328

Diaphyseal osteosarcoma with varying histomorphologic patterns  

PubMed Central

Osteosarcoma is the most common primary malignant tumor of the skeleton involving predominantly metaphysis of the long bones. Diaphyseal osteosarcoma is a rare form, which accounts for approximately 10% of all cases of osteosarcomas. Osteosarcoma contains a family of lesions with considerable diversity in histologic features and grade. We present a case of a 29-year-old male with diaphyseal osteosarcoma of the left tibia, who presented with pain and swelling over middle one-third of the left leg. The biopsy of the lesion revealed varied histomorphologic features in a small tissue studied. This prompted us to report the various histologic patterns of osteosarcoma. PMID:24600604

Kumar, Harsh; Buch, Archana C.; Sawlani, Vinay M.; Chandanwale, Shirish S.

2014-01-01

329

Probing charge scattering mechanisms in suspended graphene by varying its dielectric environment  

NASA Astrophysics Data System (ADS)

Graphene with high carrier mobility ? is required both for graphene-based electronic devices and for the investigation of the fundamental properties of Dirac fermions. An attractive approach to increase the mobility is to place graphene in an environment with high static dielectric constant ? that would screen the electric field due to the charged impurities present near graphene's surface. Here we investigate the effect of the dielectric environment of graphene and study electrical transport in multi-terminal graphene devices suspended in liquids with ? ranging from 1.9 to 33. For non-polar liquids (?<5), we observe a rapid increase of ?(?), with room-temperature mobility reaching ~60,000 cm2 Vs-1 for devices in anisole (?=4.3). We associate this trend with dielectric screening of charged impurities adsorbed on graphene. We observe much lower mobility ?~20,000 cm2 Vs-1 for devices in polar liquids (??18) and explain it by additional scattering caused by ions present in such liquids.

Newaz, A. K. M.; Puzyrev, Yevgeniy S.; Wang, Bin; Pantelides, Sokrates T.; Bolotin, Kirill I.

2012-03-01

330

Toward a North American Standard for Mobile Data Services  

NASA Technical Reports Server (NTRS)

The rapid introduction of digital mobile communications systems is an important part of the emerging digital communications scene. These developments pose both a potential problem and a challenge. On one hand, these separate market driven developments can result in an uncontrolled mixture of analog and digital links which inhibit data modem services across the mobile/Public Switched network (PSTN). On the other hand, the near coincidence of schedules for development of some of these systems, i.e., Digital Cellular, Mobile Satellite, Land Mobile Radio, and ISDN, provides an opportunity to address interoperability problems by defining interfaces, control, and service standards that are compatible among these new services. In this paper we address the problem of providing data services interoperation between mobile terminals and data devices on the PSTN. The expected data services include G3 Fax, asynchronous data, and the government's STU-3 secure voice system, and future data services such as ISDN. We address a common architecture and a limited set of issues that are key to interoperable mobile data services. We believe that common mobile data standards will both improve the quality of data service and simplify the systems for manufacturers, data users, and service providers.

Dean, Richard A.; Levesque, Allen H.

1991-01-01

331

Waste Toolkit A-Z Mobile phones  

E-print Network

Waste Toolkit A-Z Mobile phones How to recycle your mobile phone Recycling your mobile phone makes and recycling can help to reduce the demand for new raw materials. Do not put mobile phones in the recycling waste company Most mobile phone shops recycle old mobiles, so you can either take your old mobile

Melham, Tom

332

Spaceborne Mobile Ad-Hoc Networks  

NASA Astrophysics Data System (ADS)

Reliable global networking is essential for a rapidly growing mobile and interactive communication. Satellite communication plays already a significant role in this subject. However, the classical space-based data transmission requires an appropriate infrastructure, both on the ground and in orbit. This paper discusses the potential of a self-organising distributed satellite system in Low Earth Orbits (LEO) to achieve a seamless integration in already existing infrastructures. The communication approach is based on dynamic Inter Satellite Links (ISL) not controlled nor coordinated on an individual basis from the ground-based stations.

Forcada, I.; Strauss, A.

2010-08-01

333

Toroidal Varied-Line Space (TVLS) Gratings  

NASA Technical Reports Server (NTRS)

It is a particular challenge to develop a stigmatic spectrograph for XUV wavelengths since the very low normal-incidence reflectance of standard materials most often requires that the design be restricted to a single optical element which must simultaneously provide both re-imaging and spectral dispersion. This problem has been solved in the past by the use of toroidal gratings with uniform line-spaced rulings (TULS). A number of solar EUV (Extreme Ultraviolet) spectrometers have been based on such designs, including SOHO/CDS, Solar-B/EIS, and the sounding rockets SERTS and EUNIS. More recently, Kita, Harada, and collaborators have developed the theory of spherical gratings with varied line-space rulings (SVLS) operated at unity magnification, which have been flown on several astronomical satellite missions. We now combine these ideas into a spectrometer concept that puts varied-line space rulings onto toroidal gratings. Such TVLS designs are found to provide excellent imaging even at very large spectrograph magnifications and beam-speeds, permitting extremely high-quality performance in remarkably compact instrument packages. Optical characteristics of two solar spectrometers based on this concept are described: SUMI, proposed as a sounding rocket experiment, and NEXUS, proposed for the Solar Dynamics Observatory mission.

Thomas, Roger J.; Oegerle, William (Technical Monitor)

2002-01-01

334

Varying execution discipline to increase performance  

SciTech Connect

This research investigates the relationship between execution discipline and performance. The hypothesis has two parts: 1. Different execution disciplines exhibit different performance for different computations, and 2. These differences can be effectively predicted by heuristics. A machine model is developed that can vary its execution discipline. That is, the model can execute a given program using either the control-driven, data-driven or demand-driven execution discipline. This model is referred to as a ``variable-execution-discipline`` machine. The instruction set for the model is the Program Dependence Web (PDW). The first part of the hypothesis will be tested by simulating the execution of the machine model on a suite of computations, based on the Livermore Fortran Kernel (LFK) Test (a.k.a. the Livermore Loops), using all three execution disciplines. Heuristics are developed to predict relative performance. These heuristics predict (a) the execution time under each discipline for one iteration of each loop and (b) the number of iterations taken by that loop; then the heuristics use those predictions to develop a prediction for the execution of the entire loop. Similar calculations are performed for branch statements. The second part of the hypothesis will be tested by comparing the results of the simulated execution with the predictions produced by the heuristics. If the hypothesis is supported, then the door is open for the development of machines that can vary execution discipline to increase performance.

Campbell, P.L.; Maccabe, A.B.

1993-12-22

335

Mobile propeller dynamometer validation  

NASA Astrophysics Data System (ADS)

With growing interest in UAVs and OSU's interest in propeller performance and manufacturing, evaluating UAV propeller and propulsion system performance has become essential. In attempts to evaluate these propellers a mobile propeller dynamometer has been designed, built, and tested. The mobile dyno has been designed to be cost effective through the ability to load it into the back of a test vehicle to create simulated forward flight characteristics. This allows much larger propellers to be dynamically tested without the use of large and expensive wind tunnels. While evaluating the accuracy of the dyno, several improvements had to be made to get accurate results. The decisions made to design and improve the mobile propeller dyno will be discussed along with attempts to validate the dyno by comparing its results against known sources. Another large part of assuring the accuracy of the mobile dyno is determining if the test vehicle will influence the flow going into the propellers being tested. The flow into the propeller needs to be as smooth and uniform as possible. This is determined by characterizing the boundary layer and accelerated flow over the vehicle. This evaluation was accomplished with extensive vehicle aerodynamic measurements with the use of full-scale tests using a pitot-rake and the actual test vehicle. Additional tests were conducted in Oklahoma State University's low speed wind tunnel with a 1/8-scale model using qualitative flow visualization with smoke. Continuing research on the mobile dyno will be discussed, along with other potential uses for the dyno.

Morris, Mason Wade

336

Mobile systems capability plan  

SciTech Connect

This plan was prepared to initiate contracting for and deployment of these mobile system services. 102,000 cubic meters of retrievable, contact-handled TRU waste are stored at many sites around the country. Also, an estimated 38,000 cubic meters of TRU waste will be generated in the course of waste inventory workoff and continuing DOE operations. All the defense TRU waste is destined for disposal in WIPP near Carlsbad NM. To ship TRU waste there, sites must first certify that the waste meets WIPP waste acceptance criteria. The waste must be characterized, and if not acceptable, subjected to additional processing, including repackaging. Most sites plan to use existing fixed facilities or open new ones between FY1997-2006 to perform these functions; small-quantity sites lack this capability. An alternative to fixed facilities is the use of mobile systems mounted in trailers or skids, and transported to sites. Mobile systems will be used for all characterization and certification at small sites; large sites can also use them. The Carlsbad Area Office plans to pursue a strategy of privatization of mobile system services, since this offers a number of advantages. To indicate the possible magnitude of the costs of deploying mobile systems, preliminary estimates of equipment, maintenance, and operating costs over a 10-year period were prepared and options for purchase, lease, and privatization through fixed-price contracts considered.

NONE

1996-09-01

337

Mapping Oyster Reef Habitats in Mobile Bay  

NASA Technical Reports Server (NTRS)

Oyster reefs around the world are declining rapidly, and although they haven t received as much attention as coral reefs, they are just as important to their local ecosystems and economies. Oyster reefs provide habitats for many species of fish, invertebrates, and crustaceans, as well as the next generations of oysters. Oysters are also harvested from many of these reefs and are an important segment of many local economies, including that of Mobile Bay, where oysters rank in the top five commercial marine species both by landed weight and by dollar value. Although the remaining Mobile Bay oyster reefs are some of the least degraded in the world, projected climate change could have dramatic effects on the health of these important ecosystems. The viability of oyster reefs depends on water depth and temperature, appropriate pH and salinity levels, and the amount of dissolved oxygen in the water. Projected increases in sea level, changes in precipitation and runoff patterns, and changes in pH resulting from increases in the amount of carbon dioxide dissolved in the oceans could all affect the viability of oyster reefs in the future. Human activities such as dredging and unsustainable harvesting practices are also adversely impacting the oyster reefs. Fortunately, several projects are already under way to help rebuild or support existing or previously existing oyster reefs. The success of these projects will depend on the local effects of climate change on the current and potential habitats and man s ability to recognize and halt unsustainable harvesting practices. As the extent and health of the reefs changes, it will have impacts on the Mobile Bay ecosystem and economy, changing the resources available to the people who live there and to the rest of the country, since Mobile Bay is an important national source of seafood. This project identified potential climate change impacts on the oyster reefs of Mobile Bay, including the possible addition of newly viable habitats in the southeastern regions of the Bay.

Bolte, Danielle

2011-01-01

338

On controller tuning for a flexible-link manipulator with varying payload  

NASA Technical Reports Server (NTRS)

In this article experimental results are presented for system identification and control of a single-link flexible manipulator carrying an unknown, varying payload. The control objective is to maintain endpoint position accuracy in the presence of flexure effects after rapid movement due to a rigid body slew-angle commanded position. Various time-domain parameter estimation techniques are used to identify ARMA model representations to be employed in controller tuning schemes for vibration compensation. Only endpoint acceleration measurements and motor shaft angle measurements are utilized in relatively simple PID control schemes, which are tuned as dictated by a varying, unknown payload.

Yurkovich, Stephen; Pachecho, Fernando E.

1989-01-01

339

Mobility Reversal of Polyelectrolyte-Grafted Colloids in Monovalent Salt Solutions  

NASA Astrophysics Data System (ADS)

We present molecular dynamics simulations on the electrophoresis of a negative colloid grafted with positive polyelectrolytes. Net-neutral colloids show a varying mobility in monovalent salt. For colloids with negative net charge the mobility is negative at low and positive at high salt concentrations. This mobility reversal is an electrokinetic effect, and thus different from that observed in multivalent salt. Our results agree with numerical calculations based on the Darcy-Brinkman formalism, with which we predict the mobility reversal to also occur for experimentally accessible colloids.

Raafatnia, Shervin; Hickey, Owen A.; Holm, Christian

2014-12-01

340

Mobile Phone Terminal  

NASA Technical Reports Server (NTRS)

In the photo, an employee of a real estate firm is contacting his office by means of HICOM, an advanced central terminal for mobile telephones. Developed by the Orlando Division of Martin Marietta Aerospace, Orlando, Florida, and manufactured by Harris Corporation's RF Division, Rochester, N.Y., HICOM upgrades service to users, provides better system management to telephone companies, and makes more efficient use of available mobile telephone channels through a computerized central control terminal. The real estate man, for example, was able to dial his office and he could also have direct-dialed a long distance number. Mobile phones in most areas not yet served by HICOM require an operator's assistance for both local and long distance calls. HICOM improves system management by automatically recording information on all calls for accurate billing, running continual performance checks on its own operation, and reporting any malfunctions to a central office.

1978-01-01

341

Exxon and Mobil Merge  

NSDL National Science Digital Library

This week's In the News looks at the recent megamerger between Exxon Corporation and Mobil Corporation. The ten resources discussed provide news, financial data, and opinion on the largest corporate purchase to date as well as information on the oil industry in general. In a move deemed "the end of the age of OPEC" by Wall Street Journal reporter Bernard Wysocki, Exxon Chairman Lee R. Raymond formally bought Mobil Oil Company for $74.4 billion on December 1, 1998. Critics of the deal await antitrust scrutiny, although officials at Exxon Mobil, as the new company will be called, cite a "volatile world economy" and the need to "enhance global competition" as central to their decision.

Waters, Megan.

342

An aeronautical mobile satellite experiment  

NASA Technical Reports Server (NTRS)

The various activities and findings of a NASA/FAA/COMSAT/INMARSAT collaborative aeronautical mobile satellite experiment are detailed. The primary objective of the experiment was to demonstrate and evaluate an advanced digital mobile satellite terminal developed at the Jet Propulsion Laboratory under the NASA Mobile Satellite Program. The experiment was a significant milestone for NASA/JPL, since it was the first test of the mobile terminal in a true mobile satellite environment. The results were also of interest to the general mobile satellite community because of the advanced nature of the technologies employed in the terminal.

Jedrey, T. C.; Dessouky, K. I.; Lay, N. E.

1990-01-01

343

Rapid road repair vehicle  

DOEpatents

Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find at the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was not heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past. 2 figs.

Mara, L.M.

1998-05-05

344

Rapid road repair vehicle  

DOEpatents

Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find an the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was was heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past.

Mara, Leo M. (Livermore, CA)

1998-01-01

345

Rapid climate change  

SciTech Connect

Interactions between insolation changes due to orbital parameter variations, carbon dioxide concentration variations, the rate of deep water formation in the North Atlantic and the evolution of the northern hemisphere ice sheets during the most recent glacial cycle will be investigated. In order to investigate this period, a climate model is being developed to evaluate the physical mechanisms thought to be most significant during this period. The description of the model sub-components will be presented. The more one knows about the interactions between the sub-components of the climate system during periods of documented rapid climate change, the better equipped one will be to make rational decisions on issues related to impacts on the environment. This will be an effort to gauge the feedback processes thought to be instrumental in rapid climate shifts documented in the past, and their potential to influence the current climate. 53 refs.

Morantine, M.C. [Tulane Univ., New Orleans, LA (United States). Dept. of Mechanical Engineering

1995-12-31

346

Light disappears rapidly (exponentially)  

E-print Network

#12;#12;#12;#12;Light disappears rapidly (exponentially) with depth At the same time, the color of the light shifts #12;#12;#12;#12;· Euphotic zone ­ plentiful light ­ 0-100 m (about) · Dysphotic zone ­ very, very little light ­ 100-1000 m (about) · Aphotic zone ­ no light ­ below 1000 m #12;Sunlight in Water

Kudela, Raphael M.

347

Stereolithography and Rapid Prototyping  

Microsoft Academic Search

Stereolithography is a “rapid prototyping” or additive manufacturing process that has been used to fabricate 3D and high aspect\\u000a ratio microstructures for customized packaging of microfluidic devices and microsensors. Microstereolithography denotes a\\u000a collection of processes and technologies that can fabricate devices and packages with improved resolution, with features down\\u000a to 1 ?m in size. We show the feasibility of the

David W. Rosen

348

ATHLETE: A Mobility and Manipulation System for Mobile Lunar Habitats  

NASA Astrophysics Data System (ADS)

ATHLETE is a mobility and manipulation system considered by recent Lunar Architecture Teams. This presentation will discuss the possible use of ATHLETE-based mobile habitats for global-scale scientific exploration of the moon.

Wilcox, B. H.

2008-03-01

349

Rapid adhesive bonding concepts  

NASA Technical Reports Server (NTRS)

Adhesive bonding in the aerospace industry typically utilizes autoclaves or presses which have considerable thermal mass. As a consequence, the rates of heatup and cooldown of the bonded parts are limited and the total time and cost of the bonding process is often relatively high. Many of the adhesives themselves do not inherently require long processing times. Bonding could be performed rapidly if the heat was concentrated in the bond lines or at least in the adherends. Rapid adhesive bonding concepts were developed to utilize induction heating techniques to provide heat directly to the bond line and/or adherends without heating the entire structure, supports, and fixtures of a bonding assembly. Bonding times for specimens are cut by a factor of 10 to 100 compared to standard press bonding. The development of rapid adhesive bonding for lap shear specimens (per ASTM D1003 and D3163), for aerospace panel bonding, and for field repair needs of metallic and advanced fiber reinforced polymeric matrix composite structures are reviewed.

Stein, B. A.; Tyeryar, J. R.; Hodges, W. T.

1984-01-01

350

Autonomous mobile robot teams  

NASA Technical Reports Server (NTRS)

This paper describes autonomous mobile robot teams performing tasks in unstructured environments. The behavior and the intelligence of the group is distributed, and the system does not include a central command base or leader. The novel concept of the Tropism-Based Cognitive Architecture is introduced, which is used by the robots in order to produce behavior transforming their sensory information to proper action. The results of a number of simulation experiments are presented. These experiments include worlds where the robot teams must locate, decompose, and gather objects, and defend themselves against hostile predators, while navigating around stationary and mobile obstacles.

Agah, Arvin; Bekey, George A.

1994-01-01

351

An electromagnetic perpetuum mobile?  

E-print Network

A charge moving freely in orbit around the Earth radiates according to Larmor's formula. If the path is closed, it would constitute a perpetuum mobile. The solution to this energy paradox is found in an article by C. M. DeWitt and B. DeWitt from 1964. The main point is that the equation of motion of a radiating charge is modified in curved spacetime. In the present article we explain the physics behind this modification, and use the generalized equation to solve the perpetuum mobile paradox.

Řyvind Grřn; Sigurd Kirkevold Nćss

2008-06-03

352

Mobile Augmented Reality Applications  

E-print Network

Augmented reality have undergone considerable improvement in past years. Many special techniques and hardware devices were developed, but the crucial breakthrough came with the spread of intelligent mobile phones. This enabled mass spread of augmented reality applications. However mobile devices have limited hardware capabilities, which narrows down the methods usable for scene analysis. In this article we propose an augmented reality application which is using cloud computing to enable using of more complex computational methods such as neural networks. Our goal is to create an affordable augmented reality application suitable which will help car designers in by 'virtualizing' car modifications.

Prochazka, David; Popelka, Ondrej; Stastny, Jiri

2011-01-01

353

Mobile Learning Anytime, Anywhere  

NSDL National Science Digital Library

Evidence shows that portable technology tools engage students and promote learning, and the potential for teachers to add academic value to these tools is growing. Some educational institutions are taking the leap to mobile learning (m-learning) by giving out free iPods; however, any technology able to connect to wireless or mobile phone networks or to access Web-based public or private services can be used. As new resources continue to be developed, m-learning takes what we already know about the benefits of e-learning to the next level.

Oksana Hlodan (AIBS; )

2010-10-01

354

Segway robotic mobility platform  

NASA Astrophysics Data System (ADS)

The Segway Robotic Mobility Platform (RMP) is a new mobile robotic platform based on the self-balancing Segway Human Transporter (HT). The Segway RMP is faster, cheaper, and more agile than existing comparable platforms. It is also rugged, has a small footprint, a zero turning radius, and yet can carry a greater payload. The new geometry of the platform presents researchers with an opportunity to examine novel topics, including people-height sensing and actuation modalities. This paper describes the history and development of the platform, its characteristics, and a summary of current research projects involving the platform at various institutions across the United States.

Nguyen, Hoa G.; Morrell, John; Mullens, Katherine D.; Burmeister, Aaron B.; Miles, Susan; Farrington, Nathan; Thomas, Kari M.; Gage, Douglas W.

2004-12-01

355

Correlation ion mobility spectroscopy  

DOEpatents

Correlation ion mobility spectrometry (CIMS) uses gating modulation and correlation signal processing to improve IMS instrument performance. Closely spaced ion peaks can be resolved by adding discriminating codes to the gate and matched filtering for the received ion current signal, thereby improving sensitivity and resolution of an ion mobility spectrometer. CIMS can be used to improve the signal-to-noise ratio even for transient chemical samples. CIMS is especially advantageous for small geometry IMS drift tubes that can otherwise have poor resolution due to their small size.

Pfeifer, Kent B. (Los Lunas, NM); Rohde, Steven B. (Corrales, NM)

2008-08-26

356

Mobile transporter path planning  

NASA Technical Reports Server (NTRS)

The use of a genetic algorithm (GA) for solving the mobile transporter path planning problem is investigated. The mobile transporter is a traveling robotic vehicle proposed for the space station which must be able to reach any point of the structure autonomously. Elements of the genetic algorithm are explored in both a theoretical and experimental sense. Specifically, double crossover, greedy crossover, and tournament selection techniques are examined. Additionally, the use of local optimization techniques working in concert with the GA are also explored. Recent developments in genetic algorithm theory are shown to be particularly effective in a path planning problem domain, though problem areas can be cited which require more research.

Baffes, Paul; Wang, Lui

1990-01-01

357

Time varying, multivariate volume data reduction  

SciTech Connect

Large-scale supercomputing is revolutionizing the way science is conducted. A growing challenge, however, is understanding the massive quantities of data produced by large-scale simulations. The data, typically time-varying, multivariate, and volumetric, can occupy from hundreds of gigabytes to several terabytes of storage space. Transferring and processing volume data of such sizes is prohibitively expensive and resource intensive. Although it may not be possible to entirely alleviate these problems, data compression should be considered as part of a viable solution, especially when the primary means of data analysis is volume rendering. In this paper we present our study of multivariate compression, which exploits correlations among related variables, for volume rendering. Two configurations for multidimensional compression based on vector quantization are examined. We emphasize quality reconstruction and interactive rendering, which leads us to a solution using graphics hardware to perform on-the-fly decompression during rendering. In this paper we present a solution which addresses the need for data reduction in large supercomputing environments where data resulting from simulations occupies tremendous amounts of storage. Our solution employs a lossy encoding scheme to acrueve data reduction with several options in terms of rate-distortion behavior. We focus on encoding of multiple variables together, with optional compression in space and time. The compressed volumes can be rendered directly with commodity graphics cards at interactive frame rates and rendering quality similar to that of static volume renderers. Compression results using a multivariate time-varying data set indicate that encoding multiple variables results in acceptable performance in the case of spatial and temporal encoding as compared to independent compression of variables. The relative performance of spatial vs. temporal compression is data dependent, although temporal compression has the advantage of offering smooth animations, while spatial compression can handle volumes of larger dimensions.

Ahrens, James P [Los Alamos National Laboratory; Fout, Nathaniel [UC DAVIS; Ma, Kwan - Liu [UC DAVIS

2010-01-01

358

Stochastic Modeling and Power Control of Time-Varying Wireless Communication Networks  

SciTech Connect

Wireless networks are characterized by nodes mobility, which makes the propagation environment time-varying and subject to fading. As a consequence, the statistical characteristics of the received signal vary continuously, giving rise to a Doppler power spectral density (DPSD) that varies from one observation instant to the next. This paper is concerned with dynamical modeling of time-varying wireless fading channels, their estimation and parameter identification, and optimal power control from received signal measurement data. The wireless channel is characterized using a stochastic state-space form and derived by approximating the time-varying DPSD of the channel. The expected maximization and Kalman filter are employed to recursively identify and estimate the channel parameters and states, respectively, from online received signal strength measured data. Moreover, we investigate a centralized optimal power control algorithm based on predictable strategies and employing the estimated channel parameters and states. The proposed models together with the estimation and power control algorithms are tested using experimental measurement data and the results are presented.

Olama, Mohammed M [ORNL; Djouadi, Seddik M [ORNL; Charalambous, Prof. Charalambos [University of Cyprus

2014-01-01

359

Mobility platform coupling device and method for coupling mobility platforms  

DOEpatents

A coupling device for connecting a first mobility platform to a second mobility platform in tandem. An example mobility platform is a robot. The coupling device has a loose link mode for normal steering conditions and a locking position, tight link mode for navigation across difficult terrain and across obstacles, for traversing chasms, and for navigating with a reduced footprint in tight steering conditions.

Shirey, David L. (Albuquerque, NM); Hayward, David R. (Albuquerque, NM); Buttz, James H. (Albuquerque, NM)

2002-01-01

360

Mobility-Aware Efficient Job Scheduling in Mobile Grids  

Microsoft Academic Search

In this paper, we present a node mobility prediction framework based on a generic mobile grid architecture. We show how this framework can be used to formulate a cost effective job scheduling scheme based on a predetermined pricing strategy at the wireless access point. The proposed scheme is for distributing grid computing jobs to the mobile nodes and considers the

Preetam Ghosh; Nirmalya Roy; Sajal K. Das

2007-01-01

361

Mobile Tablet Use among Academic Physicians and Trainees  

PubMed Central

The rapid adoption rate and integration of mobile technology (tablet computing devices and smartphones) by physicians is reshaping the current clinical landscape. These devices have sparked an evolution in a variety of arenas, including educational media dissemination, remote patient data access and point of care applications. Quantifying usage patterns of clinical applications of mobile technology is of interest to understand how these technologies are shaping current clinical care. A digital survey examining mobile tablet and associated application usage was administered via email to all ACGME training programs. Data regarding respondent specialty, level of training, and habits of tablet usage were collected and analyzed. 40 % of respondents used a tablet, of which the iPad was the most popular. Nearly half of the tablet owners reported using the tablet in clinical settings; the most commonly used application types were point of care and electronic medical record access. Increased level of training was associated with decreased support for mobile computing improving physician capabilities and patient interactions. There was strong and consistent desire for institutional support of mobile computing and integration of mobile computing technology into medical education. While many physicians are currently purchasing mobile devices, often without institutional support, successful integration of these devices into the clinical setting is still developing. Potential reasons behind the low adoption rate may include interference of technology in doctor-patient interactions or the lack of appropriate applications available for download. However, the results convincingly demonstrate that physicians recognize a potential utility in mobile computing, indicated by their desire for institutional support and integration of mobile technology into medical education. It is likely that the use of tablet computers in clinical practice will expand in the future. Thus, we believe medical institutions, providers, educators, and developers should collaborate in ways that enhance the efficacy, reliability, and safety of integrating these devices into daily medical practice. PMID:23321961

Sclafani, Joseph; Tirrell, Timothy F.

2014-01-01

362

Advanced extravehicular mobility unit study  

NASA Technical Reports Server (NTRS)

Components of the advanced extravehicular mobility unit (suit) are described. Design considerations for radiation protection, extravehicular operational pressure, mobility effects, tool/glove/effector, anthropometric definition, lighting, and equipment turnaround are addressed.

Elkins, W.

1982-01-01

363

MOBILE PHONE, A SUSTAINABLE PRODUCT?  

E-print Network

MOBILE PHONE, A SUSTAINABLE PRODUCT? Marianne Parrya, b, Charlotte Sannierc, Laurent Hayem, Carole EXTRACTION AND PRODUCTION MANUFACTURING Component manufacturing Mobile phone assembly PACKAGING is the lifespan of your phone? Conditions at artisanal mining sites are poor and extremely dangerous (Amnesty

van Tiggelen, Bart

364

Developing Mobile Based Instruction  

ERIC Educational Resources Information Center

This paper describes an instructional design class's experience developing instruction for the mobile web. The class was taught at a southeastern university in the United States in a master's level computer based instruction course. Two example projects are showcased and student reflections on design issues are highlighted. Additionally,…

Martin, Florence; Pastore, Raymond; Snider, Jean

2012-01-01

365

Tourism and Mobile Technology  

Microsoft Academic Search

While tourism presents considerable potential for the use of new mobile technologies, we currently have little understanding of how tourists organise their activities or of the problems they face. This paper presents an ethnographic study of city tourists' practices that draws out a number of implications for designing tourist technology. We describe how tourists work together in groups, collaborate around

Barry Brown; Matthew Chalmers

2003-01-01

366

Mobile Library Filming Device.  

ERIC Educational Resources Information Center

This report contains details of the study and performance test of the Mobile Filming Library Device which consists of a camera and self contained power source. Because of the cost savings and service improvement characteristics, this technique involving the use of a microfilm intermediate in the preparation of copies of material filed in full size…

Martin, Claud E.

367

MOBILE6.2  

EPA Science Inventory

MOBILE6.2 is a computer program that estimates hydrocarbon (HC), carbon monoxide (CO), oxides of nitrogen (NOx), exhaust particulate matter (which consists of several components), tire wear particulate matter, brake wear particulate matter, sulfur dioxide (SO2), ammonia (NH3), si...

368

Mathematics and Mobile Learning  

ERIC Educational Resources Information Center

This paper argues for an approach to mobile learning that leverages students' informal digital practices as resources for designing mathematics classrooms activities. We briefly describe two exploratory designs along these lines, one featuring the use of photos taken by students outside class and the other centered on their recording and…

White, Tobin; Martin, Lee

2014-01-01

369

Essays on Teacher Mobility  

ERIC Educational Resources Information Center

The allocation of quality teachers across schools is of interest because of both the importance and costliness of teachers as inputs in the education production process. Furthermore, because teachers have preferences over their workplace characteristics, this allocation across schools is nonrandom. This research examines teacher mobility within…

Cook, Jeremy A.

2012-01-01

370

Mobile extracorporeal membrane oxygenation.  

PubMed

Transport of critically ill neonates in need of extracorporeal membrane oxygenation can be risky. Their extreme cardiorespiratory instability may delay or even preclude conventional transport to an extracorporeal membrane oxygenation center. We report the use of a UH-1 helicopter specially adapted for mobile extracorporeal membrane oxygenation support to transport a critically ill neonate. PMID:8494441

Faulkner, S C; Taylor, B J; Chipman, C W; Baker, L L; Fasules, J W; Van DeVanter, S H; Harrell, J E

1993-05-01

371

Mobile satellite communications  

Microsoft Academic Search

The paper presents an up-to-date overview as well as new results on mobile satellite communications. Specifically, the following subjects are addressed: worldwide activities; satellite orbits; multiple access techniques; Novstar global positioning system; economic and regulatory issues; future trends. Some of these technical and nontechnical subjects appeal disjoint, but they are unique and significant among the many facets, which effect the

W. W. Wu; E. F. Miller; W. L. Pritchard; R. L. Pickholtz

1994-01-01

372

Autonomous mobile robot  

SciTech Connect

This patent describes a mobile robot of the type having (a) a vision system, (b) memory means for storing data derived from the robot vision system, and (c) a computer for processing data derived from the robot's vision system, the improvement wherein the robot's vision system comprises (i) a first array of ranging transducers for obtaining data on the position and distance of far objects in a volume of space, the transducers of the first array being symmetrically disposed on the mobile robot with respect to an axis of symmetry within the mobile robot. Each transducer of the first array is fixed in position with respect to that axis of symmetry and sees a portion of the volume of space seen by its entire array; (ii) a second array of ranging transducers for obtaining data of the position and distance of near objects in the same or an overlapping volume of space, the transducers of the second array being symmetrically disposed on the mobile robot with respect to the axis of symmetry. Each transducer of the second array is fixed in position with respect to the axis of symmetry and sees a portion of the volume of space seen by its entire array, the angle of view of the transducers of the second array being different from the angle of view of the transducers of the first array with respect to the same object in space; and (iii) means for polling the ranging transducers in sequences determined by the computer.

Mattaboni, P.J.

1987-01-20

373

Mobile product customization  

Microsoft Academic Search

Many companies are using the web to enable customers to individually customize their products that range from automobiles and bicycles to CDs, cosmetics and shirts. In this paper we present a mobile application for product customization and production within a smart factory. This allows the ad hoc configuration of products at the point of sale (POS). We investigate human factors

Sven Gehring; Markus Löchtefeld; Johannes Schöning; Dominic Gorecky; Peter Stephan; Antonio Krüger; Michael Rohs

2010-01-01

374

Socializing in mobile gaming  

Microsoft Academic Search

Currently the most prevalent format for mobile gaming is the single-player variety, where users interact with the game's artificial intelligence within a number of genres such as sports, action, racing, and puzzle games, etc. The users install the game and play it for entertainment and to pass the time until repetitiveness and boredom prompts them to stop playing that game

Sheila A. Paul; Marianne Jensen; Chui Yin Wong; Chee-weng Khong

2008-01-01

375

CO2 Mobility Control  

Microsoft Academic Search

As early as 1955, surfactants were recognized for their effectiveness in lowering gas mobility in reservoir cores by in-situ foam generation. For commercial field application a specific surfactant must have several important characteristics. It must be (1) highly effective with low cost, (2) chemically stable, soluble, and surface active in oilfield brines, and (3) unaffected by contact with crude oil

Stan Dellinger; John Patton; Stan Holbrook

1984-01-01

376

Mobile lighting apparatus  

DOEpatents

A mobile lighting apparatus includes a portable frame such as a moveable trailer or skid having a light tower thereon. The light tower is moveable from a stowed position to a deployed position. A hydrogen-powered fuel cell is located on the portable frame to provide electrical power to an array of the energy efficient lights located on the light tower.

Roe, George Michael; Klebanoff, Leonard Elliott; Rea, Gerald W; Drake, Robert A; Johnson, Terry A; Wingert, Steven John; Damberger, Thomas A; Skradski, Thomas J; Radley, Christopher James; Oros, James M; Schuttinger, Paul G; Grupp, David J; Prey, Stephen Carl

2013-05-14

377

Mobil lube dewaxing technologies  

Microsoft Academic Search

Currently, the lube refining industry is in a period of transition, with both hydroprocessing and catalytic dewaxing gathering momentum as replacements for solvent extraction and solvent dewaxing. In addition, lube product quality requirements have been increasing, both in the US and abroad. Mobil has developed a broad array of dewaxing catalytic technologies which can serve refiners throughout the stages of

C. L. Baker; M. P. McGuiness

1995-01-01

378

Mobile Learning for All  

ERIC Educational Resources Information Center

Parents and educational professionals are asking the question, "Are schools preparing students for their future lives?" Mobile technologies such as smart phones, iPods, GPS systems, iPads, and a constant stream of information drive much of people's world and work. The use of such technologies increases with each passing day. But how often do…

Bestwick, Angel; Campbell, John R.

2010-01-01

379

CVO Mobile Telemetry Trailer  

USGS Multimedia Gallery

Photograph of new mobile telemetry trailer for the Cascades Volcano Observatory (CVO). The purpose of the trailer is to provide a communication link in the event that CVO needs to respond to a Cascade volcanic crisis at a volcano that is currently under-monitored (includes all Cascade volcanoes exce...

380

MOBILE INJECTION TREATMENT UNIT  

Microsoft Academic Search

CBA Environmental Services (CBA) has developed and patented an innovative environmental remediation technology known as the Mobile Injection Treatment Unit (MITU). The MITU was originally designed to remove volatile organic contaminants (VOCs) through the use of hot air injection and soil mixing. CBA has improved the process of in-situ enhanced thermal desorption and expanded the capabilities of the MITU to

Bruce L. Bruso; Clark A. Romberger

381

Smart Mobility Dutch Automotive  

E-print Network

aspects Car accidents #12;Negative aspects Traffic jams #12;More roads Safer Roads Current measures #12 in mobility patterns and road traffic user interaction #12;Process controls for more efficient planning-zero accidents · Being in a traffic jam is predictable and voluntary happening #12;· Cars themselves will solve

Franssen, Michael

382

Use of mobile phones in ICU--why not ban?  

PubMed

Due to the rapid growth of mobile telecommunications it is predicted that by 2005 there will be 1.6 billion mobile phone users worldwide. The usage of cellphones in Intensive Care Units carries with it a high incidence of interference with a number of medical devices like implantable defibrillators, cardioverters, pacemakers, monitors and other important devices like ventilators. It is in this context that this article will throw a light on complications of cellphones use in the Intensive Care Units and various strategies that can be taken to restrict their use in the Intensive Care Units. PMID:15636335

Yeolekar, M E; Sharma, A

2004-04-01

383

Spatially Varying Determinants of Farmland Conversion Across Qiantang Watershed, China  

NASA Astrophysics Data System (ADS)

This paper employed geographically weighted regression (GWR) to characterize the determinants of farmland conversion at administrative scale between 1994 and 2003 across Qiantang watershed, China. Six determinants were identified: total area of forest, distance to highway, distance to second road, distance to river, population, and gross domestic product. Relationships between these identified determinants and farmland conversion showed great spatial non-stationarity, since their character, nature, and strength varied significantly across space. Typically, for cities whose development was heavily relied on road infrastructure development, the impacts of "distance to second road" and "distance to river" was negative. However, in mountainous areas, the restriction of terrain factors led to positive impacts from these two variables. For areas undergoing rapid socio-economic development, farmland conversion was accelerated by population growth and economic development. However, for more urbanized regions, a slow-down rate of farmland conversion would be expected. Our study highlighted that the problem of spatial non-stationarity should be addressed when qualifying the determinants of farmland conversion. Linking our results within the context of farmland protection, we argue that implementing local-specific land management practices, instead of the current one-size-fits-all framework, is the key for the success of farmland protection in China.

Su, Shiliang; Xiao, Rui

2013-10-01

384

MOBILE-TERMINATED DATA User's Guide  

E-print Network

MOBILE-TERMINATED DATA User's Guide Iridium Satellite LLC Rev. 2; February 1, 2002 #12;MOBILE................................................................................................................................3 1.1 IRIDIUM MOBILE TERMINATED DATA CONNECTIVITY ..........................................................................................................................7 4 Mobile Terminated Call Scenarios

Ashley, Michael C. B.

385

47 CFR 20.7 - Mobile services.  

Code of Federal Regulations, 2013 CFR

... 2 2013-10-01 2013-10-01 false Mobile services. 20.7 Section 20.7 Telecommunication...CONTINUED) COMMON CARRIER SERVICES COMMERCIAL MOBILE SERVICES § 20.7 Mobile services. The following are mobile...

2013-10-01

386

47 CFR 20.7 - Mobile services.  

Code of Federal Regulations, 2012 CFR

... 2 2012-10-01 2012-10-01 false Mobile services. 20.7 Section 20.7 Telecommunication...CONTINUED) COMMON CARRIER SERVICES COMMERCIAL MOBILE SERVICES § 20.7 Mobile services. The following are mobile...

2012-10-01

387

47 CFR 20.7 - Mobile services.  

... 2 2014-10-01 2014-10-01 false Mobile services. 20.7 Section 20.7 Telecommunication...CONTINUED) COMMON CARRIER SERVICES COMMERCIAL MOBILE SERVICES § 20.7 Mobile services. The following are mobile...

2014-10-01

388

Reweaving UMA: Urbanism Mobility Architecture  

Microsoft Academic Search

The immediate context of this book is the changing theoretical debate within and around mobility. After decades of stagnation into quantitative problem-solving approaches and models of functional organisation the discourse on mobility is now taking its moves - once again - from within the fields of urban design and architecture. However, although there is a growing awareness that mobility is

L. M. Calabrese

2004-01-01

389

Mobile Technology in Educational Services  

ERIC Educational Resources Information Center

The use of computers and the Internet has successfully enabled educational institutions to provide their students and staff members with various online educational services. With the recent developments in mobile technology, further possibilities are emerging to provide such services through mobile devices such as mobile phones and PDAs. By…

Chen, Jueming; Kinshuk

2005-01-01

390

Crowdsourcing Mobile Workflows with Tweetflows  

E-print Network

Distributed Systems Group The use of mobile devices and applications (Apps) offer users ubiquitous access findings, we introduce a light-weight flow language that is tailored to mobile Apps with regard to SOA world application scenario. Keywords: service-oriented architectures, mobility, apps, crowdsourcing

Dustdar, Schahram

391

Ip micro-mobility protocols  

Microsoft Academic Search

Abstract: The IETF Mobile IP Working Group is discussing a number of enhancements to the base protocol to reduce the latency, packet loss... In this article, we discuss a number of "micro-mobility protocols" that extend Mobile IP with fast handoff and paging capabilities. The aim of this article is not to provide an exhaustive survey of these protocols. Rather, we

A. T. Campbell; J. Gomez

2001-01-01

392

Mobile trusted computing Chris Mitchell  

E-print Network

); ­ Fundamentals of trusted computing. 2. Mobile security: ­ The need for a trusted mobile platform; ­ The current status of mobile security; ­ Need for standardisation. www.opentc.net #12;3 Contents II 3. A Trusted Computing Platform Alliance): an industry working group. · Focus: enhancing trust and security in computing

Mitchell, Chris

393

Mobile Manipulation using NASA's Robonaut  

Microsoft Academic Search

The Johnson Space Center has developed a new mobile manipulation system with the combination of a Robonaut upper body mounted onto a Segway mobile base. The objective is to study a fluid and coordinated control of dexterous limbs on a mobile robot. The system has been demonstrated interacting with people, tools, and urban interfaces built for humans. Human interactions have

Robert O. Ambrose; Robert T. Savely; S. M. Goza; Philip Strawser; Myron A. Diftler; I. M. Spain; N. Radford

2004-01-01

394

Mobile learning in teacher training  

Microsoft Academic Search

This paper describes a mobile learning project, where mobile devices are used for educational activities. The main focus of this paper is teacher training. Experiences on the use of mobile technology and how it was used in teacher training, especially how trainees and supervising teachers felt about it, are presented. The pilot study was carried out at the Department of

Pauliina Seppälä; Harri Alamäki

2003-01-01

395

Mobile Device Policy & Program Considerations  

E-print Network

Page 1 Mobile Device Policy & Program Considerations To BYOD or not to BYOD (bring to manage the use of mobile devices within their corporate resources. Every business will naturally have different mobility requirements, and developing a policy in the first place, let alone an appropriate policy

Fisher, Kathleen

396

Mobile Computig: Conclusions Evaggelia Pitoura  

E-print Network

' & $ % Mobile Computig: Conclusions Evaggelia Pitoura Computer Science Department, University; ' & $ % Mobile Computing Models ffl What is the best way to partition a computation as well as the functionality of a system or application between stationary and mobile elements? Adaptivity: the functionality assigned

Pitoura, Evaggelia

397

Libraries and the Mobile Revolution  

ERIC Educational Resources Information Center

With the advent of mobile phones--and smartphones in particular--people are slowly moving away from the notion that mobile phones are just for making calls and texting. This coupled with the fact that the uptake of mobile phones hit the 5 billion mark in 2010 has spurred many libraries to offer services that can be used by their patrons on these…

Krishnan, Yvonne

2011-01-01

398

Creating a Mobile Library Website  

ERIC Educational Resources Information Center

The overwhelming results were iPhones and Android devices. Since the library wasn't equipped technologically to develop an in-house application platform and because we wanted the content to work across all mobile platforms, we decided to focus on creating a mobile web-based platform. From the NLM page of mobile sites we chose the basic PubMed/…

Cutshall, Tom C.; Blake, Lindsay; Bandy, Sandra L.

2011-01-01

399

UMAR: Ubiquitous Mobile Augmented Reality  

Microsoft Academic Search

In this paper we discuss the prospects of using marker based Augmented Reality for context aware applications on mobile phones. We also present the UMAR, a conceptual framework for developing Ubiquitous Mobile Augmented Reality applications which consists of research areas identified as relevant for successfully bridging the physical world and the digital domain using Mobile Augmented Reality. A step towards

Anders Henrysson; Mark Ollila

2004-01-01

400

Language Support for Mobile Agents  

Microsoft Academic Search

Mobile agents are code-containing objects that may be transmitted between communicatingparticipants in a distributed system. As opposed to systems that onlyallow the exchange of nonexecutable data, systems incorporating mobile agentscan achieve significant gains in performance and functionality.A programming language for mobile agents must be able to express theirconstruction, transmission, receipt, and subsequent execution. Its implementationmust handle architectural heterogeneity...

Frederick Colville Knabe

1995-01-01

401

Mobile Learning in Higher Education  

ERIC Educational Resources Information Center

This mixed method research study investigated the beliefs of university faculty regarding mobile learning. As well as to determine if providing technology professional development to university faculty supports the increase of mobile learning opportunities in higher education. This study used the Beliefs About Mobile Learning Inventory (BAMLI) to…

Fraga, Lucretia M.

2012-01-01

402

Long range hopping mobility platform.  

SciTech Connect

Sandia National Laboratories has developed a mesoscale hopping mobility platform (Hopper) to overcome the longstanding problems of mobility and power in small scale unmanned vehicles. The system provides mobility in situations such as negotiating tall obstacles and rough terrain that are prohibitive for other small ground base vehicles. The Defense Advanced Research Projects Administration (DARPA) provided the funding for the hopper project.

Spletzer, Barry Louis; Fischer, Gary John

2003-03-01

403

Location Based Services Enterprise Mobility  

Microsoft Academic Search

The main concept of location based services enterprise mobility (LBS-EM) is to grab the information of location based objects, which are specified such as restaurant, hospitals, IT companies etc, and the same to view on the mobile device. LBS works similar to the yellow pages where you have to search for the specified object. To avail a beneficial mobile access

Vimal Joy; S. Sridevi; P. Vimal Laxman

2008-01-01

404

Mobile satellite service for Canada  

NASA Technical Reports Server (NTRS)

The Mobile Satellite (MSAT) system and a special program designed to provide interim mobile satellite services (IMSS) during the construction phase of MSAT are described. A mobile satellite system is a key element in extending voice and and data telecommunications to all Canadians.

Sward, David

1988-01-01

405

Rapid prototype and test  

SciTech Connect

In order to support advanced manufacturing, Sandia has acquired the capability to produce plastic prototypes using stereolithography. Currently, these prototypes are used mainly to verify part geometry and ``fit and form`` checks. This project investigates methods for rapidly testing these plastic prototypes, and inferring from prototype test data actual metal part performance and behavior. Performances examined include static load/stress response, and structural dynamic (modal) and vibration behavior. The integration of advanced non-contacting measurement techniques including scanning laser velocimetry, laser holography, and thermoelasticity into testing of these prototypes is described. Photoelastic properties of the epoxy prototypes to reveal full field stress/strain fields are also explored.

Gregory, D.L.; Hansche, B.D.

1996-06-01

406

Rapid and Quiet Drill  

NASA Technical Reports Server (NTRS)

This describes aspects of the rapid and quiet drill (RAQD), which is a prototype apparatus for drilling concrete or bricks. The design and basic principle of operation of the RAQD overlap, in several respects, with those of ultrasonic/ sonic drilling and coring apparatuses described in a number of previous NASA Tech Briefs articles. The main difference is that whereas the actuation scheme of the prior apparatuses is partly ultrasonic and partly sonic, the actuation scheme of the RAQD is purely ultrasonic. Hence, even though the RAQD generates considerable sound, it is characterized as quiet because most or all of the sound is above the frequency range of human hearing.

Sherrit, Stewart; Badescu, Mircea; Bar-Cohen, Yoseph; Chang, Zensheu; Bao, Xiaoqi

2007-01-01

407

Pediatric lupus: varied haematological picture and presentation.  

PubMed

Systemic lupus erythematosus (SLE) is a chronic, multisystem, autoimmune disease characterized by periods of increased disease activity caused by inflammation of blood vessels and connective tissue. Pediatric patients with SLE have a more severe clinical course when compared with adults. Patients commonly present with rash, fever, and arthritis, although the presentation may be unpredictable. Hematological findings are more predominant in children than adults. Thirty-nine percent of children with SLE will develop hematological abnormalities, one of the American Rheumatic Association criteria for classifying the disease. In our case series we found varied hematological picture and presentation. We present here four case reports of SLE cases with interesting hematological features. Our first case is a 13 month old female child who was initially diagnosed as Evans syndrome and 2 years later diagnosed as SLE. Second case is a 3 year old male child who had SLE with warm antibody AIHA. Third case is a 6 year old female child who presented with AIHA and was diagnosed with SLE 6 years later. Fourth case is a 6 year old female child diagnosed as SLE with aplastic anemia. Hematological findings should be carefully assessed and treated in order to decrease disease related morbidity. PMID:25548448

Thakur, Neha; Chandra, Jagdish; Dhingra, Bhavna; Singh, V

2015-03-01

408

Memristive biosensors under varying humidity conditions.  

PubMed

We attempt to examine the potential of silicon nanowire memristors in the field of nanobiosensing. The memristive devices are crystalline Silicon (Si) Nanowires (NWs) with Nickel Silicide (NiSi) terminals. The nanowires are fabricated on a Silicon-on-Insulator (SOI) wafer by an Ebeam Lithography Technique (EBL) process that allows high resolution at the nanoscale. A Deep Reactive Ion Etching (DRIE) technique is used to define free-standing nanowires. The close alignment between Silicon (Si) and Nickel-Silicide (NiSi) terminals forms a Schottky-barrier at their junction. The memristive effect of the fabricated devices matches well with the memristor theory. An equivalent circuit reproducing the memristive effect in current-voltage (I-V) characteristics of our silicon nanowires is presented too. The memristive silicon nanowire devices are then functionalized with anti-human VEGF (Vascular Endothelial Growth Factor) antibody and I-V characteristics are examined for the nanowires prior to and after protein functionalization. The uptake of bio-molecules linked to the surface of the memristive NWs is confirmed by the increased voltage gap in the hysteresis curve. The effects of varying humidity conditions on the conductivity of bio-modified memristive silicon nanowires are deeply investigated. PMID:24594511

Puppo, Francesca; Dave, Akshat; Doucey, Marie-Agnčs; Sacchetto, Davide; Baj-Rossi, Camilla; Leblebici, Yusuf; De Micheli, Giovanni; Carrara, Sandro

2014-03-01

409

Extracting Laterally Varying Attenuation from Microseisms  

NASA Astrophysics Data System (ADS)

Noise cross-correlation (NCC) has been successfully used in constructing empirical Green's functions (EGFs) for seismic velocity tomography. However, extracting reliable EGF amplitudes for attenuation estimation remains a challenge despite the fact that there are studies that derive spatially averaged attenuation from noise. In this work we use microseisms recorded by the USArray stations to explore the techniques that may accomplish the task to accurately measure EGF amplitudes and thus provide reliable input to the tomographic mapping of the laterally varying attenuation. Traditional NCC processing often trades amplitude information for phases with a better signal-to-noise ratio (SNR). An equally efficient method, temporal flattening, which removes the dominance of high-level noise in particular time intervals, and yet keeps the relative amplitudes among stations, is to normalize the narrow-band signals at each station by an average of the noise energy level at all stations. In addition to the effect of traditional NCC processing, EGF amplitude can also be biased by the uneven distribution of noise-field intensity in space, time and direction. To mitigate the effect of anisotropic noise field, we calculate EGFs using beam cross-correlation (BCC). Namely we construct beams according to the strike of a station pair and the surface-wave velocity, so that the beam signal contains mainly the energy flux along the strike. We validate our methods by comparing the surface-wave amplitudes from an earthquake with relative EGF amplitudes from a "source" station near the earthquake.

Zhang, J.; Yang, X.; Weaver, R. L.

2011-12-01

410

Serotonin release varies with brain tryptophan levels  

NASA Technical Reports Server (NTRS)

This study examines directly the effects on serotonin release of varying brain tryptophan levels within the physiologic range. It also addresses possible interactions between tryptophan availability and the frequency of membrane depolarization in controlling serotonin release. We demonstrate that reducing tryptophan levels in rat hypothalamic slices (by superfusing them with medium supplemented with 100 microM leucine) decreases tissue serotonin levels as well as both the spontaneous and the electrically-evoked serotonin release. Conversely, elevating tissue tryptophan levels (by superfusing slices with medium supplemented with 2 microM tryptophan) increases both the tissue serotonin levels and the serotonin release. Serotonin release was found to be affected independently by the tryptophan availability and the frequency of electrical field-stimulation (1-5 Hz), since increasing both variables produced nearly additive increases in release. These observations demonstrate for the first time that both precursor-dependent elevations and reductions in brain serotonin levels produce proportionate changes in serotonin release, and that the magnitude of the tryptophan effect is unrelated to neuronal firing frequency. The data support the hypothesis that serotonin release is proportionate to intracellular serotonin levels.

Schaechter, Judith D.; Wurtman, Richard J.

1990-01-01

411

Honeybee odometry: performance in varying natural terrain.  

PubMed

Recent studies have shown that honeybees flying through short, narrow tunnels with visually textured walls perform waggle dances that indicate a much greater flight distance than that actually flown. These studies suggest that the bee's "odometer" is driven by the optic flow (image motion) that is experienced during flight. One might therefore expect that, when bees fly to a food source through a varying outdoor landscape, their waggle dances would depend upon the nature of the terrain experienced en route. We trained honeybees to visit feeders positioned along two routes, each 580 m long. One route was exclusively over land. The other was initially over land, then over water and, finally, again over land. Flight over water resulted in a significantly flatter slope of the waggle-duration versus distance regression, compared to flight over land. The mean visual contrast of the scenes was significantly greater over land than over water. The results reveal that, in outdoor flight, the honeybee's odometer does not run at a constant rate; rather, the rate depends upon the properties of the terrain. The bee's perception of distance flown is therefore not absolute, but scene-dependent. These findings raise important and interesting questions about how these animals navigate reliably. PMID:15252454

Tautz, Juergen; Zhang, Shaowu; Spaethe, Johannes; Brockmann, Axel; Si, Aung; Srinivasan, Mandyam

2004-07-01

412

An intelligent mobile location-aware book recommendation system that enhances problem-based learning in libraries  

Microsoft Academic Search

Despite rapid and continued adoption of mobile devices, few learning modes integrate with mobile technologies and libraries' environments as innovative learning modes that emphasize the key roles of libraries in facilitating learning. In addition, some education experts have claimed that transmitting knowledge to learners is not the only educational goal, as cultivating problem-solving skills is also essential. By integrating the

Chih-Ming Chen

2011-01-01

413

Intraoperative observation of changes in cochlear nerve action potentials during exposure to electromagnetic fields generated by mobile phones  

Microsoft Academic Search

BackgroundThe rapid spread of devices generating electromagnetic fields (EMF) has raised concerns as to the possible effects of this technology on humans. The auditory system is the neural organ most frequently and directly exposed to electromagnetic activity owing to the daily use of mobile phones. In recent publications, a possible correlation between mobile phone usage and central nervous system tumours

Vittorio Colletti; Marco Mandalŕ; Paolo Manganotti; Stefano Ramat; Luca Sacchetto; Liliana Colletti

2010-01-01

414

An Intelligent Mobile Location-Aware Book Recommendation System that Enhances Problem-Based Learning in Libraries  

ERIC Educational Resources Information Center

Despite rapid and continued adoption of mobile devices, few learning modes integrate with mobile technologies and libraries' environments as innovative learning modes that emphasize the key roles of libraries in facilitating learning. In addition, some education experts have claimed that transmitting knowledge to learners is not the only…

Chen, Chih-Ming

2013-01-01

415

The effects of varying task priorities on language production by young and older adults  

PubMed Central

The present study compared how varying task priorities affected young and older adults’ language production. Both young and older adults responded to monetary incentives to vary their performance when simultaneously talking and tracking a pursuit rotor. Tracking performance improved when they were rewarded for tracking and declined when they were rewarded for talking. Both young and older adults also spoke more slowly when rewarded for tracking and more rapidly when rewarded for talking. Young produced less complex sentences when rewarded for tracking and produced more complex sentences when rewarded for talking. However, older adults did not vary their grammatical complexity as a function of monetary incentives. These results are consistent with prior studies suggesting that older adults use a simplified speech register in response to dual task demands. PMID:21424957

Kemper, Susan; Schmalzried, RaLynn; Herman, Ruth; Mohankumar, Deepthi

2009-01-01

416

Mobility-Based Mobile Relay Selection in MANETs  

NASA Astrophysics Data System (ADS)

The future wireless mobile communication networks are expected to provide seamless wireless access and data exchange to mobile users. In particular, it is expected that the demand for ubiquitous data exchange between mobile users will increase with the widespread use of various wireless applications of the intelligent transportation system (ITS) and intelligent vehicles. Mobile ad hoc networks (MANETs) are one of the representative research areas pursuing the technology needed to satisfy the increasing mobile communication requirements. However, most of the works on MANET systems do not take into account the continuous and dynamic changes of nodal mobility to accommodate system design and performance evaluation. The mobility of nodes limits the reliability of communication between the source and the destination node since a link between two continuously moving nodes is established only when one node enters the transmission range of the other. To alleviate this problem, mobile relay has been studied. In particular, it is shown that relay selection is an efficient way to support nodal mobility in MANET systems. In this paper, we propose a mobility-based relay selection algorithm for the MANET environment. Firstly, we define the lifetime as the maximum link duration for which the link between two nodes remains active. Therefore, the lifetime indicates the reliability of the relay link which measures its capability to successfully support relayed communication when requested by the source node. Furthermore, we consider a series of realistic scenarios according to the randomness of nodal mobility. Thus, the proposed algorithm can be easily applied in practical MANET systems by choosing the appropriate node mobility behavior. The numerical results show that the improved reliability of the proposed algorithm's relayed communication is achieved with a proper number of mobile relay nodes rather than with the conventional selection algorithm. Lastly, we show that random mobility of the individual nodes enhances reliability of the network in a sparse network environment.

Kim, Gilnam; Lee, Hyoungjoo; Lee, Kwang Bok

417

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 17, NO. 4, APRIL 1999 689 The Rapidly Deployable Radio Network  

E-print Network

communication facilities, such as fiber links, wire links, or satellite links. Rapid deployment and mobilityIEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 17, NO. 4, APRIL 1999 689 The Rapidly application for the RDRN is the need to quickly establish a communications infrastructure following a natural

Kansas, University of

418

RapidTech: National Center for Rapid Technologies  

NSDL National Science Digital Library

Saddleback College hosts the National Center for Rapid Technologies (RapidTech) with funding support by the National Science Foundation Advanced Technological Education program. The center focuses on automotive, aerospace, consumer product, art & animation, architecture, medical device and medical modeling. Expertise includes Digital Shape Verification (reverse engineering), CAD design, Direct Digital Manufacturing processes, Rapid Prototyping and Rapid Tooling. Direct support is provided in these areas to industry and education through direct service support, curriculum, training, case studies and manufacturing processes. Additionally, the center works closely with industry to assist in research and technologytransfer for adoption and utilization of Rapid Technologies. Certification of processes and skills are also a focus of the national center.

2008-07-21

419

Aspirated capacitor measurements of air conductivity and ion mobility spectra  

NASA Astrophysics Data System (ADS)

Measurements of ions in atmospheric air are used to investigate atmospheric electricity and particulate pollution. Commonly studied ion parameters are (1) air conductivity, related to the total ion number concentration, and (2) the ion mobility spectrum, which varies with atmospheric composition. The physical principles of air ion instrumentation are long established. A recent development is the computerized aspirated capacitor, which measures ions from (a) the current of charged particles at a sensing electrode, and (b) the rate of charge exchange with an electrode at a known initial potential, relaxing to a lower potential. As the voltage decays, only ions of higher and higher mobility are collected by the central electrode and contribute to the further decay of the voltage. This enables extension of the classical theory to calculate ion mobility spectra by inverting voltage decay time series. In indoor air, ion mobility spectra determined from both the voltage decay inversion, and an established voltage switching technique, were compared and shown to be of similar shape. Air conductivities calculated by integration were: 5.3±2.5 and 2.7±1.1fSm-1, respectively, with conductivity determined to be 3fSm-1 by direct measurement at a constant voltage. Applications of the relaxation potential inversion method include air ion mobility spectrum retrieval from historical data, and computation of ion mobility spectra in planetary atmospheres.

Aplin, K. L.

2005-10-01

420

Development of the Seating and Mobility Script Concordance Test for Spinal Cord Injury: Obtaining Content Validity Evidence  

ERIC Educational Resources Information Center

The appropriateness of a consumer's seating and mobility system varies considerably depending on the competence, proficiency, and experience of the professionals assisting the user. At present, there is a scarcity of skilled and knowledgeable therapists to evaluate and recommend seating and mobility devices. There is also a lack of measurement…

Cohen, Laura J.; Fitzgerald, Shirley G.; Lane, Suzanne; Boninger, Michael L.

2005-01-01

421

Rapid City, SD Showcase Streamgage  

USGS Multimedia Gallery

A USGS South Dakota Water Science Center streamgage was dedicated by Congressional and city officials on September 3 in Rapid City. This showcase streamgage is located on Rapid Creek at Rapid City in Founders Park and provides visitors with critical information about how streamflow is meas...

422

Targeted Social Mobilization in a Global Manhunt  

PubMed Central

Social mobilization, the ability to mobilize large numbers of people via social networks to achieve highly distributed tasks, has received significant attention in recent times. This growing capability, facilitated by modern communication technology, is highly relevant to endeavors which require the search for individuals that possess rare information or skills, such as finding medical doctors during disasters, or searching for missing people. An open question remains, as to whether in time-critical situations, people are able to recruit in a targeted manner, or whether they resort to so-called blind search, recruiting as many acquaintances as possible via broadcast communication. To explore this question, we examine data from our recent success in the U.S. State Department's Tag Challenge, which required locating and photographing 5 target persons in 5 different cities in the United States and Europe – in under 12 hours – based only on a single mug-shot. We find that people are able to consistently route information in a targeted fashion even under increasing time pressure. We derive an analytical model for social-media fueled global mobilization and use it to quantify the extent to which people were targeting their peers during recruitment. Our model estimates that approximately 1 in 3 messages were of targeted fashion during the most time-sensitive period of the challenge. This is a novel observation at such short temporal scales, and calls for opportunities for devising viral incentive schemes that provide distance or time-sensitive rewards to approach the target geography more rapidly. This observation of ?12 hours of separation' between individuals has applications in multiple areas from emergency preparedness, to political mobilization. PMID:24098660

Dsouza, Sohan; McInerney, James; Naroditskiy, Victor; Venanzi, Matteo; Jennings, Nicholas R.; deLara, J. R.; Wahlstedt, Eero; Miller, Steven U.

2013-01-01

423

Estimation of retired mobile phones generation in China: A comparative study on methodology.  

PubMed

Due to the rapid development of economy and technology, China has the biggest production and possession of mobile phones around the world. In general, mobile phones have relatively short life time because the majority of users replace their mobile phones frequently. Retired mobile phones represent the most valuable electrical and electronic equipment (EEE) in the main waste stream because of such characteristics as large quantity, high reuse/recovery value and fast replacement frequency. Consequently, the huge amount of retired mobile phones in China calls for a sustainable management system. The generation estimation can provide fundamental information to construct the sustainable management system of retired mobile phones and other waste electrical and electronic equipment (WEEE). However, the reliable estimation result is difficult to get and verify. The priority aim of this paper is to provide proper estimation approach for the generation of retired mobile phones in China, by comparing some relevant methods. The results show that the sales&new method is in the highest priority in estimation of the retired mobile phones. The result of sales&new method shows that there are 47.92million mobile phones retired in 2002, and it reached to 739.98million in China in 2012. It presents an increasing tendency with some fluctuations clearly. Furthermore, some discussions on methodology, such as the selection of improper approach and error in the input data, are also conducted in order to improve generation estimation of retired mobile phones and other WEEE. PMID:25281341

Li, Bo; Yang, Jianxin; Lu, Bin; Song, Xiaolong

2015-01-01

424

Mobile Autonomous Humanoid Assistant  

NASA Technical Reports Server (NTRS)

A mobile autonomous humanoid robot is assisting human co-workers at the Johnson Space Center with tool handling tasks. This robot combines the upper body of the National Aeronautics and Space Administration (NASA)/Defense Advanced Research Projects Agency (DARPA) Robonaut system with a Segway(TradeMark) Robotic Mobility Platform yielding a dexterous, maneuverable humanoid perfect for aiding human co-workers in a range of environments. This system uses stereo vision to locate human team mates and tools and a navigation system that uses laser range and vision data to follow humans while avoiding obstacles. Tactile sensors provide information to grasping algorithms for efficient tool exchanges. The autonomous architecture utilizes these pre-programmed skills to form human assistant behaviors. The initial behavior demonstrates a robust capability to assist a human by acquiring a tool from a remotely located individual and then following the human in a cluttered environment with the tool for future use.

Diftler, M. A.; Ambrose, R. O.; Tyree, K. S.; Goza, S. M.; Huber, E. L.

2004-01-01

425

Rapid mercury assays  

SciTech Connect

We have developed rapid assays with the potential of detecting mercury in environmental samples. our methods combine the simple ELISA-format with the selective, high affinity complexation of mercuric ions by sulfur-containing ligands. The first assay is based on a sandwich chelate formed by a protein-bound ligand immobilized on the wells of a microliter plate, mercuric ion of the analyzed sample, and another ligand conjugated to a reporter enzyme. The second assay involves competition between mercuric ions and an organomercury-conjugate to bind to a chelating conjugate. Several sulfur containing chelators (e.g., dithiocarbamates) and organomercurials linked to macromolecular carriers have been investigated in these assay formats. The assays detect mercuric ions in ppb/high ppt concentrations with high selectivity.

Szurdoki, S.; Kido, H.; Hammock, B.D. [Univ. of California, Davis, CA (United States)

1996-10-01

426

Solid state rapid thermocycling  

DOEpatents

The rapid thermal cycling of a material is targeted. A solid state heat exchanger with a first well and second well is coupled to a power module. A thermoelectric element is coupled to the first well, the second well, and the power module, is configured to transfer thermal energy from the first well to the second well when current from the power module flows through the thermoelectric element in a first direction, and is configured to transfer thermal energy from the second well to the first well when current from the power module flows through the thermoelectric element in a second direction. A controller may be coupled to the thermoelectric elements, and may switch the direction of current flowing through the thermoelectric element in response to a determination by sensors coupled to the wells that the amount of thermal energy in the wells falls below or exceeds a pre-determined threshold.

Beer, Neil Reginald; Spadaccini, Christopher

2014-05-13

427

RAVE: Rapid Visualization Environment  

NASA Technical Reports Server (NTRS)

Visualization is used in the process of analyzing large, multidimensional data sets. However, the selection and creation of visualizations that are appropriate for the characteristics of a particular data set and the satisfaction of the analyst's goals is difficult. The process consists of three tasks that are performed iteratively: generate, test, and refine. The performance of these tasks requires the utilization of several types of domain knowledge that data analysts do not often have. Existing visualization systems and frameworks do not adequately support the performance of these tasks. In this paper we present the RApid Visualization Environment (RAVE), a knowledge-based system that interfaces with commercial visualization frameworks and assists a data analyst in quickly and easily generating, testing, and refining visualizations. RAVE was used for the visualization of in situ measurement data captured by spacecraft.

Klumpar, D. M.; Anderson, Kevin; Simoudis, Avangelos

1994-01-01

428

Rapid Polymer Sequencer  

NASA Technical Reports Server (NTRS)

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.

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

2011-01-01

429

The Boxes Go Mobile  

NSDL National Science Digital Library

Learners display their findings after a study of surface area and volume. They build a mobile to show a commercially available box and a constructed cubical box of the same volume. Learners also display the pieces left over from the original box showing that the cubical box has less surface area. This activity requires learners to have previous knowledge of calculating surface area and volume. Activity time can be divided over multiple meetings.

Hebrank, Mary R.

2013-01-01

430

Mobility implants: a review.  

PubMed

We present a brief review of mobility implants, their contribution, and the experiences derived after almost 40 years since the new concepts of full mobility implants were introduced. In early 1940, experiments with a new material for the making of plastic artificial eyes was also being considered for the making of orbital implants. Methyl-methacrylate (MMA) had proven inert and satisfactory for dental products. The Surgeon Generals office of the Armed Services encouraged further research and experimental work in the development of plastic eyes. The success of the new material sponsored the beginning of great expansion with new concepts for orbital implants. Through a period of more than a decade, the design and types of implants went through three stages. First, the buried implant was introduced, then the exposed integrated followed, and the buried integrated subsequently followed. The path of progress was not smooth. Theoretically correct designs and surgical procedures met unexpected practical difficulties for the ophthalmic surgeon, the patient, and the eye maker. Surgical and technical efforts were carefully reviewed to eliminate the problems encountered, only to have further unforeseen complications arise. Infections, extrusions, and migration of the implant were not uncommon. The exposed integrated implant was eventually abandoned. However, there were some extraordinary successes of mobility. A new era introduced fully buried mobility implants that were more successful. However, this procedure also produced some problems, causing infection (or allergy), extrusion, and migration. Tantalum mesh and gauze gave great promise with the inception of their use. Orbital tissue grew into the material in an astonishing way, making it possible to secure the extraocular muscles and tenons.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:2248721

Danz, W

1990-01-01

431

Mobile Phones Digital Cameras  

E-print Network

News· Tutorials· Reviews· Features· Videos· Search· Mobile Phones· Notebooks· Digital Cameras· Gaming· Computers· Audio· Software· Follow Us· Subscribe· Airport Security to Get New Scanning Device Relations Accredited online university. Get an international relations degree. www.AMUOnline.com security

Suslick, Kenneth S.

432

Anncios Google Mobile Podcast  

E-print Network

Anúncios Google Portugal Radios Mobile Podcast MMS Podcasting Modelo matemático criado por car o seu modelo em Portugal e que não foi contactado por nenhum hospital portug uês nesse sentido hospitalar", quer sejam entidades públicas ou priv adas. Agência LUSA 2006-10-31 16:15:41 Anúncios Google

Soares, JoĂŁo LuĂ­s Cardoso

433

Mint-Mobiles  

NSDL National Science Digital Library

Students design, build and test model race cars made from simple materials (lifesaver-shaped candies, plastic drinking straws, Popsicle sticks, index cards, tape) as a way to explore independent, dependent and control variables. They measure the changes in distance travelled with the addition of mass to the vehicles. Students also practice the steps of the engineering design process by brainstorming, planning, building, testing, and improving their "mint-mobiles."

2014-09-18

434

Cosmology with Time-Varying G  

NASA Astrophysics Data System (ADS)

It is shown that a Universe with a time-varying gravitational “constant” G necessarily implies creation if the rest mass of matter particles m p is constant. In this case, from Einstein's field equations, the conditions for energy-momentum propagation are ? ·( GT ? v ) from which matter and photon propagation equations are derived. Free matter particle propagation is not affected by creation that is given by GN pmp=const, where N p is the number of matter particles within a proper volume. This relation introduces explicitly the rest mass of the Universe into the field equations. Free photon propagation is affected by creation that is given by GT ? v R=const, where N ? is the number of photons within a proper volume, which is the cosmic red shift law. Conservation of the cosmic background photon distribution determines photon creation as G 3 N {?/4}. The results are applied to the case G ? t -1 equivalent to N p ÷ t. It is found that at an age t=1, 0-40 t o, of the order light takes to travel a proton size, Planck's units become of the order of the proton's mass m p, size r p, and time r p/c. Hence, matter particles at this age are quantum black holes. Evaporation of these quantum black holes at this age gives a background blackbody radiation that, red shifted to present time t 0, gives the present cosmic microwave background. A cosmological model of the Friedmann type is constructed. The red shift versus distance relation is derived taking into account creation. Using a Hubble's constant H obs=50 km sec-1 Mpc-1 and a deceleration parameter q obs=1.0 the model is of the type k=1 and gives a present age t 0=6.81×109 yr, consistent with Uranium model ages. Thus, the three results for the age of the Universe, i.e., radioactive decay, Hubble's constant, and stellar evolution are brought together in this creation model. The matter-dominated era occurs for t>7.6×10-3 t 0, while the radiation-dominated era occurs for 7.6×10-3 t o> t>10-40 t o. The origin of the Universe is placed at this last limit, which is Planck's time at the corresponding G, consisting of quantum black holes at a temperature Ti?=3×1011K.

Alfonso-Faus, Antonio

1986-03-01

435

Rapid population growth.  

PubMed

At the current rate of population growth, world population by 2000 is expected to reach 7 billion or more, with developing countries accounting for some 5.4 billion, and economically advanced nations accounting for 1.6 billion. 'Population explosion' is the result of falling mortality rates and continuing high birth rates. Many European countries, and Japan, have already completed what is termed as demographic transition, that is, birth rates have fallen to below 20 births per 1000 population, death rates to 10/1000 population, and annual growth rates are 1% or less; annual growth rates for less developed countries ranged from 2 to 3.5%. Less developed countries can be divided into 3 groups: 1) countries with both high birth and death rates; 2) countries with high birth rates and low death rates; and 3) countries with intermediate and declining birth rates and low death rates. Rapid population growth has serious economic consequences. It encourages inequities in income distribution; it limits rate of growth of gross national product by holding down level of savings and capital investments; it exerts pressure on agricultural production and land; and it creates unemployment problems. In addition, the quality of education for increasing number of chidren is adversely affected, as high proportions of children reduce the amount that can be spent for the education of each child out of the educational budget; the cost and adequacy of health and welfare services are affected in a similar way. Other serious consequences of rapid population growth are maternal death and illness, and physical and mental retardation of children of very poor families. It is very urgent that over a billion births be prevented in the next 30 years to reduce annual population growth rate from the current 2% to 1% per year. PMID:12261450

1972-01-01

436

Rapid inactivation of a moth pheromone.  

PubMed

We have isolated, cloned, and expressed a male antennae-specific pheromone-degrading enzyme (PDE) [Antheraea polyphemus PDE (ApolPDE), formerly known as Sensillar Esterase] from the wild silkmoth, A. polyphemus, which seems essential for the rapid inactivation of pheromone during flight. The onset of enzymatic activity was detected at day 13 of the pupal stage with a peak at day 2 adult stage. De novo sequencing of ApolPDE, isolated from day 2 male antennae by multiple chromatographic steps, led to cDNA cloning. Purified recombinant ApolPDE, expressed by baculovirus, migrated with the same mobility as the native protein on both native polyacrylamide and isoelectric focusing gel electrophoresis. Concentration of ApolPDE (0.5 microM) in the sensillar lymph is approximately 20,000 lower than that of a pheromone-binding protein. Native and recombinant ApolPDE showed comparable kinetic parameters, with turnover number similar to that of carboxypeptidase and substrate specificity slightly lower than that of acetylcholinesterase. The rapid inactivation of pheromone, even faster than previously estimated, is kinetically compatible with the temporal resolution required for sustained odorant-mediated flight in moths. PMID:16172410

Ishida, Yuko; Leal, Walter S

2005-09-27

437

Mobile lunar base project  

NASA Astrophysics Data System (ADS)

An explorer must possess maximal mobility on the Moon if he is to discover natural anomalies most interesting for investigation. The same problem arises in the case of utilization of lunar natural resources. Moreover, according to lunar ecology requirements we should not destroy lunar surface layers over a wide area. For mining processes, many small plots should be chosen far away from each other. The concept of a mobile lunar manned base is proposed. The base structure consists of three vertical cylindrical modules placed into triangular (top view) girder construction. Each module is 5 meters in diameter with a height of 7 meters. The space around the cylinders is filled by a one meter protective layer of lunar soil. The ends of three vertical tube-type supports are put on the separate chassis. Total volume of living and working space is about 350 cubic meters. These modules are sized for a crew of nine. The velocity of the mobile lunar base is about 8 km per hour on a horizontal surface.

Kozlov, I. A.; Shevchenko, V. V.

1995-01-01

438

Mobile EEG in epilepsy.  

PubMed

The sensitivity of routine EEG recordings for interictal epileptiform discharges in epilepsy is limited. In some patients, inpatient video-EEG may be performed to increase the likelihood of finding abnormalities. Although many agree that home EEG recordings may provide a cost-effective alternative to these recordings, their use is still not introduced everywhere. We surveyed Dutch neurologists and patients and evaluated a novel mobile EEG device (Mobita, TMSi). Key specifications were compared with three other current mobile EEG devices. We shortly discuss algorithms to assist in the review process. Thirty percent (33 out of 109) of Dutch neurologists reported that home EEG recordings are used in their hospital. The majority of neurologists think that mobile EEG can have additional value in investigation of unclear paroxysms, but not in the initial diagnosis after a first seizure. Poor electrode contacts and signal quality, limited recording time and absence of software for reliable and effective assistance in the interpretation of EEGs have been important constraints for usage, but in recent devices discussed here, many of these problems have been solved. The majority of our patients were satisfied with the home EEG procedure and did not think that our EEG device was uncomfortable to wear, but they did feel uneasy wearing it in public. PMID:24060755

Askamp, Jessica; van Putten, Michel J A M

2014-01-01

439

Biocompatible nanoparticles trigger rapid bacteria clustering.  

PubMed

This study reveals an exciting phenomenon of stimulated bacteria clustering. Rapid aggregation and microbial arrest are shown to occur in Escherichia coli solutions of neutral pH when chitosan nanoparticles with positive zeta potential are added. Because chitosan nanoparticles can easily be dispersed in aqueous buffers, the rapid clustering phenomenon requires only minuscule nanoparticle concentrations and will be critical in developing new methods for extricating bacterial pathogens. This work establishes the dominant role of electrostatic attraction in bacteria-nanoparticle interactions by varying the nanoparticle zeta potential from highly positive to strongly negative values, and by exploring concentration effects. For strongly negative nanoparticles, no clusters form, while aggregates are small and loose at intermediate conditions. In addition, optical density measurements indicate that over 90% of the suspended bacteria flocculate within seconds of being mixed with chitosan nanoparticles of a highly positive surface charge. Finally, the nanoparticles are significantly more efficient as a clustering agent compared to an equal mass of molecular chitosan in solution, as the bacteria-nanoparticle clusters formed are substantially larger. The bacteria-nanoparticle aggregation effect demonstrated here promises a rapid separation method for aiding pathogen detection and for flocculation of bacteria in fermentation processes. PMID:19565661

Larsen, Mona Utne; Seward, Matthew; Tripathi, Anubhav; Shapley, Nina C

2009-01-01

440

Supporting Seamless Mobility for P2P Live Streaming  

PubMed Central

With advent of various mobile devices with powerful networking and computing capabilities, the users' demand to enjoy live video streaming services such as IPTV with mobile devices has been increasing rapidly. However, it is challenging to get over the degradation of service quality due to data loss caused by the handover. Although many handover schemes were proposed at protocol layers below the application layer, they inherently suffer from data loss while the network is being disconnected during the handover. We therefore propose an efficient application-layer handover scheme to support seamless mobility for P2P live streaming. By simulation experiments, we show that the P2P live streaming system with our proposed handover scheme can improve the playback continuity significantly compared to that without our scheme. PMID:24977171

Kim, Eunsam; Kim, Sangjin; Lee, Choonhwa

2014-01-01

441

Survival and growth responses of Populus nigra, Salix elaeagnos and Alnus incana cuttings to varying levels of hydric stress  

Microsoft Academic Search

The Salicaceae and Betulaceae are important plant families within riparian ecosystems throughout the Northern hemisphere, and cuttings of species within these families are often used in riparian restoration projects due to their capacity for vegetative (asexual) propagation and rapid growth. Riparian zones can experience a wide range of hydrological conditions and establishing cuttings may be subjected to substantially varying levels

Robert A. Francis; Angela M. Gurnell; Geoffrey E. Petts; Peter J. Edwards

2005-01-01

442

Securing mobile code.  

SciTech Connect

If software is designed so that the software can issue functions that will move that software from one computing platform to another, then the software is said to be 'mobile'. There are two general areas of security problems associated with mobile code. The 'secure host' problem involves protecting the host from malicious mobile code. The 'secure mobile code' problem, on the other hand, involves protecting the code from malicious hosts. This report focuses on the latter problem. We have found three distinct camps of opinions regarding how to secure mobile code. There are those who believe special distributed hardware is necessary, those who believe special distributed software is necessary, and those who believe neither is necessary. We examine all three camps, with a focus on the third. In the distributed software camp we examine some commonly proposed techniques including Java, D'Agents and Flask. For the specialized hardware camp, we propose a cryptographic technique for 'tamper-proofing' code over a large portion of the software/hardware life cycle by careful modification of current architectures. This method culminates by decrypting/authenticating each instruction within a physically protected CPU, thereby protecting against subversion by malicious code. Our main focus is on the camp that believes that neither specialized software nor hardware is necessary. We concentrate on methods of code obfuscation to render an entire program or a data segment on which a program depends incomprehensible. The hope is to prevent or at least slow down reverse engineering efforts and to prevent goal-oriented attacks on the software and execution. The field of obfuscation is still in a state of development with the central problem being the lack of a basis for evaluating the protection schemes. We give a brief introduction to some of the main ideas in the field, followed by an in depth analysis of a technique called 'white-boxing'. We put forth some new attacks and improvements on this method as well as demonstrating its implementation for various algorithms. We also examine cryptographic techniques to achieve obfuscation including encrypted functions and offer a new application to digital signature algorithms. To better understand the lack of security proofs for obfuscation techniques, we examine in detail general theoretical models of obfuscation. We explain the need for formal models in order to obtain provable security and the progress made in this direction thus far. Finally we tackle the problem of verifying remote execution. We introduce some methods of verifying remote exponentiation computations and some insight into generic computation checking.

Link, Hamilton E.; Schroeppel, Richard Crabtree; Neumann, William Douglas; Campbell, Philip LaRoche; Beaver, Cheryl Lynn; Pierson, Lyndon George; Anderson, William Erik

2004-10-01

443

Mobile Photo Browsing with Pipelines and Spatial Cues  

Microsoft Academic Search

\\u000a Local memory in mobile devices increases rapidly. Simultaneously, new content creation devices, such as digital cameras, are\\u000a embedded. As a consequence, the amount of locally stored content is bound to increase in huge numbers. In order to provide\\u000a support for end-users in managing this ever-growing pile of content, new means of accessing, organizing, and enjoying the\\u000a content are needed. We

Tero Hakala; Juha Lehikoinen; Hannu Korhonen; Aino Ahtinen

2005-01-01

444

Evidence for mid-Holocene shift in depositional style in Mobile Bay, Alabama  

USGS Publications Warehouse

The Holocene stratigraphy of Mobile Bay, Alabama, was mapped using a combination of high-resolution seismic data and sediment cores to refine changes in the bay's evolution during this time. The base of the Holocene-era stratigraphy is an erosional surface formed during the last glacial maximum. Overlying Holocene deposits are primarily estuarine mud that has a finely laminated weak acoustic signature. One exception is a thin unit, R1, with varying reflection amplitude that can be traced throughout the southern part of the bay. The continuity of the unit throughout the southern part of the bay suggests a baywide change in sedimentation that was perhaps driven by rapid retreat of the bay-head delta in response to a sudden rise in sea level or an abrupt change in accommodation space due to basin geometry. Along the southern edge of the bay, the R1 unit increases in thickness and reflector amplitude towards Morgan Peninsula. The peninsula itself underwent a period of erosion and narrowing between 4,300 to 3,000 years before present, and the variation in reflector amplitude and the geometry of this part of the R1 unit appear to reflect a period of increased overwashing of the peninsula during this period. Average estuarine sedimentation rates decreased after the formation of the R1 unit, and the decrease coincides with a decline in the rate of sea-level rise. A similar change in depositional style at approximately the same time in neighboring Apalachicola Bay suggests a change that affected the northeastern Gulf of Mexico region and not just Mobile Bay.

Twichell, David; Kelso, Kyle; Pendleton, Elizabeth A.

2012-01-01

445

Microfluidic Screening of Electrophoretic Mobility Shifts Elucidates Riboswitch Binding Function  

PubMed Central

Riboswitches are RNA sensors that change conformation upon binding small molecule metabolites, in turn modulating gene expression. Our understanding of riboswitch regulatory function would be accelerated by a high throughput, quantitative screening tool capable of measuring riboswitch-ligand binding. We introduce a microfluidic mobility shift assay that enables precise and rapid quantitation of ligand binding and subsequent riboswitch conformational change. In 0.3% of the time required for bench top assays (3.2 min vs. 1020 min), we screen and validate five candidate SAM-I riboswitches isolated from thermophilic and cryophilic bacteria. The format offers enhanced resolution of conformational change compared to slab gel formats, quantitation and repeatability for statistical assessment of small mobility shifts, low reagent consumption, and riboswitch characterization without modification of the aptamer structure. Appreciable analytical sensitivity coupled with high resolution separation performance allows quantitation of equilibrium dissociation constants (Kd) for both rapidly and slowly interconverting riboswitch-ligand pairs as validated through experiments and modeling. Conformational change, triplicate mobility shift measurements, and Kd are reported for both a known and a candidate SAM-I riboswitch with comparison to in-line probing assay results. The microfluidic mobility shift assay establishes a scalable format for the study of riboswitch-ligand binding that will advance the discovery and selection of novel riboswitches and the development of antibiotics to target bacterial riboswitches. PMID:23343213

Karns, Kelly; Vogan, Jacob M.; Qin, Qian; Hickey, Scott F.; Wilson, Stephen C.; Hammond, Ming C.; Herr, Amy E.

2013-01-01

446

Differential mobility spectrometry-mass spectrometry for atomic analysis.  

PubMed

Analysis and separation of atomic ions within a portable setting are studied in forensic applications of radiological debris analysis. Ion mobility spectrometry (IMS) may be used to show separation of atomic ions, while the related method of differential mobility spectrometry (DMS) has focused on fractionation of primarily molecular components. We set out to investigate DMS as a means for separating atomic ions. We initially derived the differential ion mobility parameter, alpha, from classic empirical IMS data of atomic ions, cesium and potassium, each showing its own distinct form of alpha. These alpha functions were applied to DMS simulations and supported by analytical treatment that suggested a means for a rapid disambiguation of atomic ions using DMS. We validated this hypothesis through the prototype cesium-potassium system investigated experimentally by DMS coupled to mass spectrometry (MS). Such a feature would be advantageous in a field portable instrument for rapid atomic analyses especially in the case of isobaric ions that cannot be distinguished by MS. Herein, we first report this novel method for the derivation of alpha from existing field dependent drift tube ion mobility data. Further, we translate experimental DMS data into alpha parameters by expanding upon existing methods. Refining the alpha parameter in this manner helps convey the interpretation of the alpha parameter particularly for those new to the DMS field. PMID:25521495

Sinatra, Francy L; Wu, Tianpeng; Manolakos, Spiros; Wang, Jing; Evans-Nguyen, Theresa G

2015-02-01

447

Multi-robot formation control using potential field for mobile ad-hoc networks  

Microsoft Academic Search

Mobile ad-hoc networks are characterized by self-organization, rapid deployment and fault tolerance, however of limited communication range and frequent topology change. For a multi-robot formation supported by mobile ad-hoc networks, when the robots change their formation to avoid obstacles or for other purposes, a robot may easily lose its wireless connection with the network if it goes beyond the communication

W. H. Fan; Y. H. Liu; F. Wang; X. P. Cai

2005-01-01

448

Rapid Polymer Sequencer  

NASA Technical Reports Server (NTRS)

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 direction, or in a transverse direction, in the tip region, a polymer sequence is passed through the tip region, and a change in an electrical current signal is measured as each polymer component passes through the tip region. Each of the measured changes in electrical current signals is compared with a database of reference electrical change signals, with each reference signal corresponding to an identified polymer component, to identify the unknown polymer component with a reference polymer component. The nanopore 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.

Stolc, Viktor (Inventor); Brock, Matthew W (Inventor)

2013-01-01

449

Rapid dechlorination of pentachlorophenol  

SciTech Connect

Pentachlorophenol (PCP) has been mainly used as a wood preservative, but has also had many other industrial and agricultural applications, because it has broad pesticidal efficiency and it is inexpensive. Its widespread use has resulted in the contamination of groundwater and soil. Not only are its effects on ecosystems hazardous, but its degradation is difficult. Various remediation technologies have been investigated, including photodegradation, biodegradation and adsorption on substrates. Heavily contaminated soils pose a difficulty for biodegradation because the levels of PCP are not biologically manageable. A new remediation technology that completely and rapidly dechlorinates pentachlorophenol is presented here. Previous work demonstrated that polychlorinated biphenyls were converted to biphenyl in a short time. We have extended that investigation to a series of chlorinated phenols, including pentachlorophenol. The reactions were carried out at ambient temperature by mixing an aqueous solution of the chlorinated phenol (together with methanol, needed for complete dissolution) with the bimetallic system, palladium on iron. Mono-, di-, tri- and pentachlorophenol were all completely dechlorinated, the reaction products being phenol and chloride ions. The reaction product, phenol, was identified by GC/MS.

Grittini, C.; Romeo, G.A. Jr.; Fernando, Q. [Univ. of Arizona, Tucson, AZ (United States); Korte, N.E. [Oak Ridge National Lab., Grand Junction, CO (United States)

1996-12-31

450

Rapid Evaporation of microbubbles  

NASA Astrophysics Data System (ADS)

When a liquid is heated to a temperature far above its boiling point, it evaporates abruptly. Boiling of liquid at high temperatures can be explosive and destructive, and poses a potential hazard for a host of industrial processes. Explosive boiling may occur if a cold and volatile liquid is brought into contact with a hot and non-volatile liquid, or if a liquid is superheated or depressurized rapidly. Such possibilities are realized, for example, in the depressurization of low boiling point liquefied natural gas (LNG) in the pipelines or storage tanks as a result of a leak. While boiling of highly heated liquids can be destructive at macroscale, the (nearly) instantaneous pace of the process and the release of large amount of kinetic energy make the phenomena extremely attractive at microscale where it is possible to utilize the released energy to derive micromechanical systems. For instance, there is currently a growing interest in micro-explosion of liquid for generation of micro bubbles for actuation purposes. The aim of the current study is to gain a fundamental understanding of the subject using direct numerical simulations. In particular, we seek to investigate the boundary between stable and unstable nucleus growth in terms of the degree of liquid superheat and to compare the dynamics of unstable and stable growth.

Gautam, Jitendra; Esmaeeli, Asghar

2008-11-01

451

Comparison of Linear Microinstability Calculations of Varying Input Realism  

SciTech Connect

The effect of varying ''input realism'' or varying completeness of the input data for linear microinstability calculations, in particular on the critical value of the ion temperature gradient for the ion temperature gradient mode, is investigated using gyrokinetic and gyrofluid approaches. The calculations show that varying input realism can have a substantial quantitative effect on the results.

G. Rewoldt

2003-09-08

452

TIME-VARYING CHANNEL MODEL EFFICIENCY Scott Rickard  

E-print Network

School of Electronic, Electrical & Mechanical Engineering University College Dublin IRELAND School one path time-varying channel in the time-varying impulse re- sponse, time-frequency characterization-varying impulse response), a time- frequency characterization, and a time-scale characteriza- tion. The time

Drakakis, Konstantinos

453

Rapid 3D video/laser sensing and digital archiving with immediate on-scene feedback for 3D crime scene/mass disaster data collection and reconstruction  

NASA Astrophysics Data System (ADS)

We describe a system for rapid and convenient video data acquisition and 3-D numerical coordinate data calculation able to provide precise 3-D topographical maps and 3-D archival data sufficient to reconstruct a 3-D virtual reality display of a crime scene or mass disaster area. Under a joint U.S. army/U.S. Air Force project with collateral U.S. Navy support, to create a 3-D surgical robotic inspection device -- a mobile, multi-sensor robotic surgical assistant to aid the surgeon in diagnosis, continual surveillance of patient condition, and robotic surgical telemedicine of combat casualties -- the technology is being perfected for remote, non-destructive, quantitative 3-D mapping of objects of varied sizes. This technology is being advanced with hyper-speed parallel video technology and compact, very fast laser electro-optics, such that the acquisition of 3-D surface map data will shortly be acquired within the time frame of conventional 2-D video. With simple field-capable calibration, and mobile or portable platforms, the crime scene investigator could set up and survey the entire crime scene, or portions of it at high resolution, with almost the simplicity and speed of video or still photography. The survey apparatus would record relative position, location, and instantly archive thousands of artifacts at the site with 3-D data points capable of creating unbiased virtual reality reconstructions, or actual physical replicas, for the investigators, prosecutors, and jury.

Altschuler, Bruce R.; Oliver, William R.; Altschuler, Martin D.

1996-02-01

454

Trigonometry via Mobile Device  

NSDL National Science Digital Library

Students investigate the relationships between angles and side lengths in right triangles with the help of materials found in the classroom and a mobile device. Using all or part of a meter stick or dowel and text books or other supplies, students build right triangles and measure the angles using a clinometer application on an Android® (phone or tablet) or iOS® device (iPhone® or iPad®). Then they are challenged to create a triangle with a given side length and one angle. The electronic device is used to measure the accuracy of their constructions.

Impart Ret Program

455

Mobile Bay turbidity study  

NASA Technical Reports Server (NTRS)

The termination of studies carried on for almost three years in the Mobile Bay area and adjacent continental shelf are reported. The initial results concentrating on the shelf and lower bay were presented in the interim report. The continued scope of work was designed to attempt a refinement of the mathematical model, assess the effectiveness of optical measurement of suspended particulate material and disseminate the acquired information. The optical characteristics of particulate solutions are affected by density gradients within the medium, density of the suspended particles, particle size, particle shape, particle quality, albedo, and the angle of refracted light. Several of these are discussed in detail.

Crozier, G. F.; Schroeder, W. W.

1978-01-01

456

Mobile Router Developed and Tested  

NASA Technical Reports Server (NTRS)

The NASA Glenn Research Center, under a NASA Space Act Agreement with Cisco Systems, has been performing joint networking research to apply Internet-based technologies and protocols to space-based communications. As a result of this research, NASA performed stringent performance testing of the mobile router, including the interaction of routing and the transport-level protocol. In addition, Cisco Systems developed the mobile router for both commercial and Government markets. The code has become part of the Cisco Systems Internetworking Operating System (IOS) as of release 12.2 (4) T--which will make this capability available to the community at large. The mobile router is software code that resides in a network router and enables entire networks to roam while maintaining connectivity to the Internet. This router code is pertinent to a myriad of applications for both Government and commercial sectors, including the "wireless battlefield." NASA and the Department of Defense will utilize this technology for near-planetary observation and sensing spacecraft. It is also a key enabling technology for aviation-based information applications. Mobile routing will make it possible for information such as weather, air traffic control, voice, and video to be transmitted to aircraft using Internet-based protocols. This technology shows great promise in reducing congested airways and mitigating aviation disasters due to bad weather. The mobile router can also be incorporated into emergency vehicles (such as ambulances and life-flight aircraft) to provide real-time connectivity back to the hospital and health-care experts, enabling the timely application of emergency care. Commercial applications include entertainment services, Internet protocol (IP) telephone, and Internet connectivity for cruise ships, commercial shipping, tour buses, aircraft, and eventually cars. A mobile router, which is based on mobile IP, allows hosts (mobile nodes) to seamlessly "roam" among various IP subnetworks. This is essential in many wireless networks. A mobile router, unlike a mobile IP node, allows entire networks to roam. Hence, a device connected to the mobile router does not need to be a mobile node because the mobile router provides the roaming capabilities. There are three basic elements in the mobile IP: the home agent, the foreign agent, and the mobile node. The home agent is a router on a mobile node's home network that tunnels datagrams for delivery to the mobile node when it is away from home. The foreign agent is a router on a remote network that provides routing services to a registered mobile node. The mobile node is a host or router that changes its point of attachment from one network or subnetwork to another. In mobile routing, virtual communications are maintained by the home agent, which forwards all packets for the mobile networks to the foreign agent. The foreign agent passes the packets to the mobile router, which then forwards the packets to the devices on its networks. As the mobile router moves, it will register with its home agent on its whereabouts via the foreign agent to assure continuous connectivity.

Ivancic, William D.

2002-01-01

457

Accrual of MRI white matter abnormalities in elderly with normal and impaired mobility.  

PubMed

White matter signal abnormality (WMSA) is often present in the MRIs of older persons with mobility impairment. We examined the relationship between impaired mobility and the progressive accrual of WMSA. Mobility was assessed with the Short Physical Performance Battery (SPPB) and quantitative measures of gait and balance. Fourteen subjects had baseline and follow-up MRI scans performed 20 months apart. WMSA was detected and quantified using automated computer algorithms. In the control subjects, WMSA volume increased by 0.02+/-0.05% ICCV (percent intracranial cavity volume)/year while the WMSA of mobility impaired subjects increased five-times faster (0.10+/-0.10 ICCV/year, p=0.03). WMSA volume was related to some of the mobility measures and was sensitive to change which was not true of the other MRI variables. The study demonstrates the sensitivity of longitudinal automated volumetric analysis of WMSA to differentiate differences in the accrual rate of WMSA in groups selected on the basis of mobility. Based on these results, we propose that a subset of subjects with mobility impairment have accelerated, disease related WMSA accrual, thus explaining the rapid progression of mobility impairment in some older persons without apparent cause. This study demonstrates that quantitative MRI and performance measures can provide valuable insight into the rate of progression and pathophysiologic abnormalities underlying mobility impairment. PMID:15850578

Wolfson, Leslie; Wei, Xingchang; Hall, Charles B; Panzer, Victoria; Wakefield, Dorothy; Benson, Randall R; Schmidt, Julia A; Warfield, Simon K; Guttmann, Charles R G

2005-05-15

458

Amazon Forests Depleting Rapidly  

NSDL National Science Digital Library

Does Brazil have to choose between economic growth and preserving the endangered Amazon?http://www.economist.com/world/la/displayStory.cfm?story_id=2597880Deforestation patterns in the Amazonhttp://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16511The causes of Deforestation are Complexhttp://earthobservatory.nasa.gov/Library/Deforestation/New highways drive accelerating deforestation in Amazonhttp://www.scienceblog.com/community/article2744.htmlStanford scientist develops satellite to study Amazonhttp://daily.stanford.edu/tempo?page=content&id=12852&repository=0001_articleAmazon drought emergency widenshttp://news.bbc.co.uk/2/hi/americas/4344310.stmDespite earlier claims by the Brazilian government that the rate of deforestation in the Amazon had fallen by as much as 50%, scientists from the U.S. and Brazil have found that the Amazon Rainforests are being depleted more rapidly than previously thought. The deforestation is so rapid and expansive that the only effective means by which to measure is by using satellite imagery. Satellite imagery not only detects vast tracts of clear cutting, it is also able to detect selective logging. Selective logging is a process in which loggers only cut down valuable trees, leaving the remainder of the forest alone. Logging companies claim that this process is much more environmentally friendly than clear cutting. While this may be true, environmentalists believe that tree removal of any kind can be detrimental to an ecosystem. They claim that the process of building roads and bringing heavy equipment into these forests is disruptive and damaging. The scientists producing this study claim that deforestation of the Brazilian Amazon has been underestimated by as much as 60%. The Brazilian government stated that although they welcomed the research the numbers were exaggerated. Deforestation is only one of many environmental calamities causing harm to the Amazon. A severe drought, coupled with severe cases of industrial pollution, is making the Amazon a severely endangered ecosystem. [CMH]The first link is to a BBC News article on the new evidence on â??stealthâ?ť logging as well as the new deforestation numbers based on the satellite images. The second link is to an article studying the economic issues of deforestation. The third link illustrates the deforestation patterns in the Amazon using the satellite images. The fourth is a link, which examines the many issues surrounding deforestation in social, economic, and environmental terms. The fifth link is an article discussing issues of highway construction and its connection to deforestation and pollution. The sixth link is to an article detailing the satellite developed at Stanford University designed to study the Amazon. The final link is an article by the BBC with information on the severe drought plaguing the Amazon. [CMH

2005-01-01

459

76 FR 41522 - In the Matter of Certain Electronic Devices, Including Mobile Phones, Mobile Tablets, Portable...  

Federal Register 2010, 2011, 2012, 2013

...Devices, Including Mobile Phones, Mobile Tablets, Portable Music Players, and Computers, and Components Thereof; Notice of...importation of certain mobile phones, mobile tablets, portable music players, and computers. 76 FR 24051 (Apr. 29,...

2011-07-14

460

Healthcare in the Pocket: Mapping the Space of Mobile-Phone Health Interventions  

PubMed Central

Mobile phones are becoming an increasingly important platform for the delivery of health interventions. In recent years, researchers have used mobile phones as tools for encouraging physical activity and healthy diets, for symptom monitoring in asthma and heart disease, for sending patients reminders about upcoming appointments, for supporting smoking cessation, and for a range of other health problems. This paper provides an overview of this rapidly growing body of work. We describe the features of mobile phones that make them a particularly promising platform for health interventions, and we identify five basic intervention strategies that have been used in mobile-phone health applications across different health conditions. Finally, we outline the directions for future research that could increase our understanding of functional and design requirements for the development of highly effective mobile-phone health interventions. PMID:21925288

Klasnja, Predrag; Pratt, Wanda

2011-01-01

461

University of Florida Intellectual Property Policy and Mobile Applications (Mobile Apps) The development of mobile applications (mobile apps) at the University of Florida and the desire to  

E-print Network

University of Florida Intellectual Property Policy and Mobile Applications (Mobile Apps) The development of mobile applications (mobile apps) at the University of Florida and the desire to increase their development have given rise to questions concerning their ownership. It is expected that mobile apps

Wu, Dapeng Oliver

462

Applying ATM to mobile infrastructure networks  

Microsoft Academic Search

In response to the explosive increase in the number of mobile subscribers and the ever stronger demand for mobile multimedia services, the authors propose introducing the ATM technique for next-generation mobile network infrastructures in order to handle a high volume of traffic and develop multimedia communications. First, this article clarifies mobile-specific requirements for and advantages of applying ATM to mobile

H. Nakamura; H. Tsuboya; M. Nakano; A. Nakajima

1998-01-01

463

Mobility Management Using Frequently Visited Location Database  

Microsoft Academic Search

In mobile or wireless networks, it is one of the most important technologies to track the location of the mobile users. The mobility management basically is performed by using two databases, HLR (home location register) and VLR (visitor location register). A mobile user move anywhere in mobile networks, location registration for call tracking is always needed. And those registration operations

Jae-woo Lee

2007-01-01

464

Advanced mobile satellite communications using COMETS satellite in MM-wave and Ka-band  

NASA Technical Reports Server (NTRS)

Early in the 21st century, the demand for personal communications using mobile, hand-held, and VSAT terminals will rapidly increase. In a future system, many different types of services should be provided with one-hop connection. The Communications Research Laboratory (CRL) has studied a future advanced mobile satellite communications system using millimeter wave and Ka band. In 1990, CRL started the Communications and Broadcasting Engineering Test Satellite (COMETS) project. The satellite has been developed in conjunction with NASDA and will be launched in 1997. This paper describes the COMETS payload configuration and the experimental system for the advanced mobile communications mission.

Ohmori, Shingo; Isobe, Shunkichi; Takeuchi, Makoto; Naito, Hideyuki

1993-01-01

465

Point and transfer mobility of point-connected ribbed plates  

NASA Astrophysics Data System (ADS)

The work reported in this paper addresses the problem of structure-borne sound transmission between vibrating sources and ribbed-plate receiver structures. Vibrating sources, such as pumps, motors, fans, etc., transmit vibro-acoustic power, causing noise complaints by occupants in cars, trains, aircraft, buildings and/or material fatigue and damage. The transmission process is complicated in that sources transmit power through several contacts and by up to six components of excitation at each contact. The structure-borne sound power is a function of source activity, source mobility and receiver mobility, and all three quantities must be known to some degree. For non-homogeneous receiver structures, such as thin-plate cavity constructions or lightweight framed constructions, the sheathing plates are typically fastened to the framing members using bolts, screws or spot-welded joints. Hence the resulting system is a point-connected ribbed plate structure and the receiver mobility is expected to vary significantly with position. Since measured receiver data seldom is available for prediction purposes, a method of estimating the point and transfer mobility of point connected ribbed plates is required. In this paper, an approximate approach, based on substitution forces, is described. The model uses infinite beam and infinite plate behaviour as input quantities. Estimates of point and transfer mobility are compared with measured results using a timber joist floor construction as an example.

Mayr, A. R.; Gibbs, B. M.

2011-09-01

466

Mobility Control with Local Views of Neighborhood in Mobile Networks  

Microsoft Academic Search

Recent work in mobile ad hoc networks, simply MANETs, has drawn attention to the mobility capability of each node. In (5), it is proved that the optimal positions of the relay nodes along a single active flow must lie entirely on the line between the source and destination with each node spaced evenly along such a line. Based on this,

Zhen Jiang; Jie Wu; Robert Kline

2006-01-01

467

Mobile Sensemaking: Exploring Proximity and Mobile Applications in the Classroom  

E-print Network

Mobile Sensemaking: Exploring Proximity and Mobile Applications in the Classroom Gustavo Zurita (Management and Information Systems Department, Faculty of Economy and Business University of Chile, Santiago, University of Chile, Santiago de Chile Chile nbaloian@dcc.uchile.cl) Felipe Baytelman (Management

Antunes, Pedro

468

An Optimized Solution for Mobile Environment Using Mobile Cloud Computing  

Microsoft Academic Search

Cloud computing has been the most prevalent technology in the past few years and many prominent enterprises have prompted their cloud systems, preparing for the coming age of cloud computing. We can predict that the mobile area will take on a boom with the advent of this new concept. While due to the inherent characteristics of mobile environment, challenges like

Qingfeng Liu; Xie Jian; Jicheng Hu; Hongchen Zhao; Shanshan Zhang

2009-01-01

469

Autonomous mobile platform  

NASA Astrophysics Data System (ADS)

This paper presents the design and development of a partially intelligent mobile platform. The mobile robot derives its intelligence from sensors such as ultrasonic range finders, a mouse and a set of microswitches. Motion is assumed to bee on a plane two dimensional surface. The platform consists of two front wheels and two rear wheels. While the front wheels are undriven, the rear wheels are individually driven by two motors to realize both forward movement as well as steering. Ultrasonic range finders have been employed to plan an obstacle free path. A mouse like arrangement is fitted in the platform's underside, with the mouse ball in contact with the surface of travel, to help the host to keep track of the platform's current position. A single chip microcontroller based card has been designed for communication between the platform and the host IBM PC. This is part of the work carried out at the department of Electronics, S.J. College of Engineering, Mysore, India.

Prakashan, A.; Samuel, S. D.; Shankar, J.; Vishal, Moondhra; Shivaswaroopa, S.; Vijayasimha, K.

1993-05-01

470

Sensitivity and Specificity of a New Vertical Flow Rapid Diagnostic Test for the Serodiagnosis of Human  

E-print Network

as antigen for the test line and purified human IgM as the control line. The mobile phase was made of gold Test for the Serodiagnosis of Human Leptospirosis. PLoS Negl Trop Dis 7(6): e2289. doi:10.1371/journalSensitivity and Specificity of a New Vertical Flow Rapid Diagnostic Test for the Serodiagnosis

Boyer, Edmond

471

Rapidly-exploring Random Tree Inspired Multi-robot Space Coverage  

E-print Network

Inspired by the Rapidly-exploring Random Tree (RRT) data-structure and algorithm for path planning, we introduce an approach for spanning physical space with a group of simple mobile robots. Emphasizing minimalism and using only InfraRed and contact...

Ghoshal, Asish

2012-07-16

472

Rapid Active Sampling Package  

NASA Technical Reports Server (NTRS)

A field-deployable, battery-powered Rapid Active Sampling Package (RASP), originally designed for sampling strong materials during lunar and planetary missions, shows strong utility for terrestrial geological use. The technology is proving to be simple and effective for sampling and processing materials of strength. Although this originally was intended for planetary and lunar applications, the RASP is very useful as a powered hand tool for geologists and the mining industry to quickly sample and process rocks in the field on Earth. The RASP allows geologists to surgically acquire samples of rock for later laboratory analysis. This tool, roughly the size of a wrench, allows the user to cut away swaths of weathering rinds, revealing pristine rock surfaces for observation and subsequent sampling with the same tool. RASPing deeper (.3.5 cm) exposes single rock strata in-situ. Where a geologist fs hammer can only expose unweathered layers of rock, the RASP can do the same, and then has the added ability to capture and process samples into powder with particle sizes less than 150 microns, making it easier for XRD/XRF (x-ray diffraction/x-ray fluorescence). The tool uses a rotating rasp bit (or two counter-rotating bits) that resides inside or above the catch container. The container has an open slot to allow the bit to extend outside the container and to allow cuttings to enter and be caught. When the slot and rasp bit are in contact with a substrate, the bit is plunged into it in a matter of seconds to reach pristine rock. A user in the field may sample a rock multiple times at multiple depths in minutes, instead of having to cut out huge, heavy rock samples for transport back to a lab for analysis. Because of the speed and accuracy of the RASP, hundreds of samples can be taken in one day. RASP-acquired samples are small and easily carried. A user can characterize more area in less time than by using conventional methods. The field-deployable RASP used a Ni/Cad rechargeable battery. Power usage was less than 1 Wh/ cm3 even when sampling strong basalts, so many samples could be taken on a single battery charge.

Peters, Gregory

2010-01-01

473

Mobile Conductance and Gossip-based Information Spreading in Mobile Networks  

E-print Network

Mobile Conductance and Gossip-based Information Spreading in Mobile Networks Huazi Zhang, Zhaoyang framework for information spreading in mobile networks based on a new performance metric, mobile conductance, which allows us to separate the details of mobility models from the study of mobile spreading time. We

Dai, Huaiyu

474

Debris Flows the Rapids of  

E-print Network

Chapter 8 Debris Flows in Grand Canyon and the Rapids of the Colorado River Robert H. Webb Peter G--is transported to the Colorado River almost exclusively by debris flows, which are irregularly occurring types discharges, debris flows create and maintain the hundreds of debris fans and associated rapids that control

475

Rapid Communication Constraining Holocene 10  

E-print Network

to link 10 Be exposure dating chronologies of ice-margin change to independent records of rapid climate of climate change. Users of 10 Be dating currently have several 10 Be production rate calibration data setsRapid Communication Constraining Holocene 10 Be production rates in Greenland JASON P. BRINER,1

Briner, Jason P.

476

An Evaluation of Mobile Health Application Tools  

PubMed Central

Background The rapid growth in the number of mobile health applications could have profound significance in the prevention of disease or in the treatment of patients with chronic disease such as diabetes. Objective The objective of this study was to describe the characteristics of the most common mobile health care applications available in the Apple iTunes marketplace. Methods We undertook a descriptive analysis of a sample of applications in the “health and wellness” category of the Apple iTunes Store. We characterized each application in terms of its health factor and primary method of user engagement. The main outcome measures of the analysis were price, health factors, and methods of user engagement. Results Among the 400 applications that met the inclusion criteria, the mean price of the most frequently downloaded paid applications was US $2.24 (SD $1.30), and the mean price of the most currently available paid applications was US $2.27 (SD $1.60). Fitness/training applications were the most popular (43.5%, 174/400). The next two most common categories were health resource (15.0%, 60/400) and diet/caloric intake (14.3%, 57/400). Applications in the health resource category constituted 5.5% (22/400) of the applications reviewed. Self-monitoring was the most common primary user engagement method (74.8%, 299/400). A total of 20.8% (83/400) of the applications used two or more user engagement approaches, with self-monitoring and progress tracking being the most frequent. Conclusions Most of the popular mobile health applications focus on fitness and self-monitoring. The approaches to user engagement utilized by these applications are limited and present an opportunity to improve the effectiveness of the technology. PMID:25099179

Sama, Preethi R; Eapen, Zubin J; Weinfurt, Kevin P; Shah, Bimal R

2014-01-01

477

Mobile vehicle road and weather observation quality check methods  

NASA Astrophysics Data System (ADS)

Today State Departments of Transportation rely more and more on road weather data to make maintenance decisions. Inaccurate data can result in wrong treatment applications or inadequate staffing levels to maintain the roadway at the desired level of service. Previous methods of road condition data reporting have been limited to static in situ sensor stations. These road weather information systems (RWIS) provide varied data about precipitation, winds, temperature, and more, but their siting does not always provide an accurate representation of weather and road conditions along the roadway. The use of mobile data collection from vehicles travelling the highway corridors may assist in the locations where RWIS sitings are sparse or non-existent. The United States Department of Transporation's "Connected Vehicle" (formally IntelliDrive) research project is designed to create a fully connected transportation system providing road and weather data collection from an extensive array of vehicles. While the implementation of Connected Vehicle is in the future, some of the theories and technologies are already in place today. Several states, as a part of the Pooled Fund Study Maintenance Decision Support System (MDSS), have equipped their winter maintenance vehicles with Mobile Data Collection Automated / Vehicle Location (MDC/AVL) systems. In addition, since 1996, automobiles sold in the United States are required to be equipped with an Onboard Diagnostic Version 2 (OBDII) port that streams live data from sensors located in and around the vehicle. While these sensors were designed for vehicle diagnostics, some of the data can be used to determine weather characteristics around the vehicle. The OBDII data can be collected by a smartphone and sent to a server in real time to be processed. These mobile systems may fill the information gap along the roads that stationary environmental sensor stations are not able to collect. Particular concern and care needs to be focused on data quality and accuracy, requiring the development of quality checks for mobile data collection. Using OBDII-equipped automobiles and mobile collection methods, we can begin to address issues of data quality by understanding, characterizing, and demonstrating the quality of mobile system observations from operational and research environments. Several forms of quality checking can be used, including range checks, Barnes spatial checks, comparing vehicle data to road weather models, and applying Clarus quality check methodologies and algorithms to mobile observations. Development of these quality checks can lead to the future integration of mobile data into the Clarus system, data implementation for improved forecasting, maintenance decision support, and traveler safety. This paper will discuss the benefits and challenges in mobile data collection, along with how the development and implementation of a system of quality checks will improve the quality and accuracy of mobile data collection.

Koller, Daniel Raymond

478

Mobile platform for acoustic mine detection applications  

NASA Astrophysics Data System (ADS)

Researchers in academia have successfully demonstrated acoustic landmine detection techniques. These typically employ acoustic or seismic sources to induce vibration in the mine/soil system, and use vibration sensors such as laser vibrometers or geophones to measure the resultant surface motion. These techniques exploit the unique mechanical properties of landmines to discriminate the vibration response of a buried mine from an off-target measurement. The Army requires the ability to rapidly and reliably scan an area for landmines and is developing a mobile platform at NVESD to meet this requirement. The platform represents an initial step toward the implementation of acoustic mine detection technology on a representative field vehicle. The effort relies heavily on the acoustic mine detection cart system developed by researchers at the University of Mississippi and Planning Systems, Inc. The NVESD platform consists of a John Deere E-gator configured with a robotic control system to accurately position the vehicle. In its present design, the E-gator has been outfitted with an array of laser vibrometers and a bank of loudspeakers. Care has been taken to ensure that the vehicle"s mounting hardware and data acquisition algorithms are sufficiently robust to accommodate the implementation of other sensor modalities. A thorough discussion of the mobile platform from its inception to its present configuration will be provided. Specific topics to be addressed include the vehicle"s control and data acquisition systems. Preliminary results from acoustic mine detection experiments will also be presented.

Libbey, Brad; Fenneman, Douglas; Burns, Brian

2005-06-01

479

Animating Suspension: Waiting for Mobilities  

Microsoft Academic Search

This article interrogates the corporeal experience of the event of waiting during the process of journeying. Rather than focusing on differential speed as central to charting the contingent relationality between mobilities and immobilities as has been the dominant mode of reasoning in mobility studies, I argue for a renewed focus on the body, specifically through the relationality between activity and

David Bissell

2007-01-01

480

Illumination Characteristics of Mobility Lights.  

ERIC Educational Resources Information Center

This study measured the light distribution patterns and the decay in light output of three mobility lights that visually impaired persons can use for night travel: the Wide-Angle Mobility Lights, the Streamlight, and the Mag-Lite. Implications are discussed in terms of selecting the most efficient visual aid for particular usage. (Author/JDD)

Wacker, R. T.; And Others

1990-01-01

481

Social Mobility and Educational Selection  

ERIC Educational Resources Information Center

There is a close interactive relationship between social mobility and educational selection. On one side, the character, direction, speed, level, methods and trends of social mobility affect the aims, goals, functions, scope, strategy, content and methods of choice in education. On the other side, the goals, basis and means of choosing education…

Dong, Zefang; Wang, Yanbin; Chen, Wenjiao

2009-01-01

482

Sensing techniques for mobile interaction  

Microsoft Academic Search

We describe sensing techniques motivated by unique aspects of human-computer interaction with handheld devices in mobile settings. Special features of mobile interaction include changing orientation and position, changing venues, the use of computing as auxiliary to ongoing, real-world activities like talking to a colleague, and the general intimacy of use for such devices. We introduce and integrate a set of

Ken Hinckley; Jeffrey S. Pierce; Mike Sinclair; Eric Horvitz

2000-01-01

483

Mobile station locating in GSM  

Microsoft Academic Search

The positioning of a mobile station (MS) will become mandatory in the US to support wireless emergency calls in the near future. Also, lots of other applications are foreseen for the location service, when implemented. In this paper the authors study the feasibility of the Global System for Mobile Communications (GSM) and MS location. The TDMA based GSM system offers

Marko Silventoinen; T. Rantalainen

1995-01-01

484

Mobile Recommender Systems Francesco Ricci  

E-print Network

Mobile Recommender Systems Francesco Ricci Faculty of Computer Science Free University of Bolzano and the information access behavior of mobile users. Moreover, as the amount of information and online services to complete a particular task (e.g., choosing a movie, or planning a trip). In particular, users of e

Ricci, Francesco

485

Sensor replacement using mobile robots  

Microsoft Academic Search

Sensor replacement is important for sensor networks to provide continuous sensing services. Upon sensor node failures, holes (uncovered areas) may appear in the sensing coverage. Existing approaches relocate redundant nodes to fill the holes and require all or most sensor nodes to have mobility. However, mobility equipment is expensive while technology trends are scaling sensors to be smaller and cheaper.

Yongguo Mei; Changjiu Xian; Saumitra M. Das; Y. Charlie Hu; Yung-hsiang Lu

2007-01-01

486

The Challenges of Mobile Computing  

Microsoft Academic Search

Advances in wireless networking technology have engendered a new paradigm ofcomputing, called mobile computing, in which users carrying portable devices haveaccess to a shared infrastructure independent of their physical location. This providesflexible communication between people and continuous access to networked services.Mobile computing is expected to revolutionize the way computers are used.This paper is a survey of the fundamental software design

George H. Forman; John Zahorjan

1994-01-01

487

OPACs and the Mobile Revolution  

ERIC Educational Resources Information Center

Since the turn of the century, one of the hottest topics in the IT world has been the coming mobile revolution. While there's been some arguing over the details, the fundamental tenet of the mobile revolution is that lots and lots of people will start accessing web content from handheld portable devices instead of using a traditional laptop or…

Liston, Samuel

2009-01-01

488

Embodied Mobile Agents Bill Tomlinson  

E-print Network

, notebooks computers, mobile phones, PDAs ­ radically changes the ways in which people engage those devices and Presentation]: Multimedia information systems ­ animation; artificial, augmented, and virtual realities. I.3, a notebook computer, a PDA, and a mobile phone. These devices are often networked to each other

Tomlinson, Bill

489

Joined Laboratory of Mobile Robotics  

E-print Network

Joined Laboratory of Mobile Robotics Joined Laboratory of mobile robotics has been foun- ded is dedicated to provide achievement of following goals: 1. research and development activities in robotics (RobotnaÂŁka robot, telepresentation lab, and furt- her projects), 2. promotion and popularization

Lucny, Andrej

490

Education & Mobility. CEE DP 100  

ERIC Educational Resources Information Center

Regional labour mobility has long been viewed as a crucial component in the functioning of the labour markets of different countries. Indeed, the study of regional labour mobility has moved towards the top of the research agenda, especially in Europe, where regional unemployment differentials have been persistently larger than in the United…

Machin, Stephen; Pelkonen, Panu; Salvanes, Kjell G.

2008-01-01

491

Using directionality in mobile routing  

Microsoft Academic Search

The increased usage of directional methods of communications has prompted research into leveraging directionality in every layer of the network stack. In this paper, we explore the use of directionality in layer 3 to facilitate routing in highly mobile environments. We introduce mobile orthogonal rendezvous routing protocol (MORRP), a lightweight, but scalable routing protocol utilizing directional communications (such as directional

Bow-Nan Cheng; Murat Yuksel; Shivkumar Kalyanaraman

2008-01-01

492

39 CFR 777.26 - Mobile homes.  

...2014-07-01 2014-07-01 false Mobile homes. 777.26 Section 777...Relocation Assistance § 777.26 Mobile homes. (a) Moving Expenses. Displaced persons who are occupants of mobile homes are eligible for moving...

2014-07-01

493

39 CFR 777.26 - Mobile homes.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Mobile homes. 777.26 Section 777...Relocation Assistance § 777.26 Mobile homes. (a) Moving Expenses. Displaced persons who are occupants of mobile homes are eligible for moving...

2013-07-01

494

39 CFR 777.26 - Mobile homes.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Mobile homes. 777.26 Section 777...Relocation Assistance § 777.26 Mobile homes. (a) Moving Expenses. Displaced persons who are occupants of mobile homes are eligible for moving...

2012-07-01

495

SECURITY CHALLENGES IN A MOBILE HEALTHCARE ENVIRONMENT  

E-print Network

, confidentiality, and integrity of sensitive patient information. Furthermore, security becomes even more criticalSECURITY CHALLENGES IN A MOBILE HEALTHCARE ENVIRONMENT Eliana Stavrou, Andreas Pitsillides@ucy.ac.cy,Andreas.Pitsillides@ucy.ac.cy Keywords: Mobile security, Healthcare security, Mobile

Pitsillides, Andreas

496

Issues in autonomous mobile sensor networks  

E-print Network

Autonomous mobile sensor networks consist of a number of autonomous mobile robots equipped with various sensors and tasked with a common mission. This thesis considers the topology control of such an ad hoc mobile sensor network. In particular, I...

Dharne, Avinash Gopal

2009-05-15

497

Temporal variations in the export of REE in boreal catchments of varying character and size  

NASA Astrophysics Data System (ADS)

Organic matter and iron colloids have a large impact on the mobilisation of trivalent elements such as aluminium (Al), rare earth elements (REE) and actinides. Recent results of the relative importance of these colloids are diverging though (POURRET et al., 2007); STEINMANN and STILLE, 2008) and there is a general lack of information of the importance of flow pathways and landscape type on the relative importance of the various colloidal fractions that mobilizes REE from the catchment soils. In this study we present the data of water chemical analysis of a series of catchments with varying size and character but all within the boreal zone. Two speciation techniques and two column separation methods involving ion exchange were used to quantify the causes for the temporal variation of the dissolved amounts of trivalent ions in these water courses. Our study indicates that REE export is controlled mostly by landscape type while changes in the acid-base character of organic matter are of minor importance. Changes in flow pathways in a riparian zone in one of the studied areas in a forested site may be used to decipher the effect of chemical versus physical processes for the mobilisation of REE and aluminium and open up the possibility for a quantitative modelling of the varying sources of REE. Iron and aluminium are mobilized together with organic matter in varying amounts in different landscape types and this affects the REE export from the various landscape elements. While the amount of strongly bound aluminium mobilized from the catchments usually correlate positively with any of the REE this is not the case for strongly bound iron. Fractionation patterns of REE are discussed and the observed binding of REE to organic matter was modelled using the speciation program WHAM VI (TIPPING, 1998). Pourret O., Davranche M., Gruau G., and Dia A. (2007) Organic complexation of rare earth elements in natural waters: Evaluating model calculations from ultrafiltration data. Geochimica Et Cosmochimica Acta 71(11), 2718-2735. Steinmann M. and Stille P. (2008) Controls on transport and fractionation of the rare earth elements in stream water of a mixed basaltic-granitic catchment basin (Massif Central, France). Chemical Geology 254(1-2), 1-18. Tipping E. (1998) Humic Ion-Binding Model VI: An improved Description of the Intercations of Protons and Metal Ions with Humic Substances. Aquatic Geochemistry 4, 3-48.

Köhler, S.; Lidman, F.; Mörth, M.; Björkvald, L.; Laudon, H.

2009-04-01

498

Rain compensation algorithm for ACTS mobile terminal  

NASA Technical Reports Server (NTRS)

The initial advanced communication technology satellite (ACTS) mobile terminal (AMT) demonstrations will involve two-way communications between the high-bit-rate link evaluation terminal (HBR-LET), which is a fixed terminal (FT), and a van-housed mobile terminal (MT). The HBR-LET has the capability of adjusting its transmitted uplink power over an approximately 10-dB range to compensate for forward uplink rain attenuation. However, because of size and weight limitations, the MT cannot use power control as a rain compensation technique. Consequently, the AMT rain compensation algorithm (RCA) is based on a formula for varying the transmitted data rate in either direction to maintain link performance within acceptable limits. The objective of the AMT RCA is to ensure reliable operation in both the forward and return directions despite the possibility of uplink or downlink fading due to rain events in the vicinity of the FT or MT. In particular, the RCA must maintain at least a 3-dB link margin at the highest possible transmission rate (AMT can operate at 9.6, 4.8, or 2.4 kb/s) permitted by the prevailing channel conditions. The 3-dB minimum link margin is a system design safety factor to accommodate conceivable implementation losses.

Levitt, Barry K.

1992-01-01

499

RapidMic: Rapid Computation of the Maximal Information Coefficient  

PubMed Central

To discover relationships and associations rapidly in large-scale datasets, we propose a cross-platform tool for the rapid computation of the maximal information coefficient based on parallel computing methods. Through parallel processing, the provided tool can effectively analyze large-scale biological datasets with a markedly reduced computing time. The experimental results show that the proposed tool is notably fast, and is able to perform an all-pairs analysis of a large biological dataset using a normal computer. The source code and guidelines can be downloaded from https://github.com/HelloWorldCN/RapidMic. PMID:24526831

Tang, Dongming; Wang, Mingwen; Zheng, Weifan; Wang, Hongjun

2014-01-01

500

Intelligent Mobile Technologies  

NASA Technical Reports Server (NTRS)

Testing involves commercial radio equipment approved for export and use in Canada. Testing was conducted in the Canadian High Arctic, where hilly terrain provided the worst-case testing. SFU and Canadian governmental agencies made significant technical contributions. The only technical data related to radio testing was exchanged with SFU. Test protocols are standard radio tests performed by communication technicians worldwide. The Joint Fields Operations objectives included the following: (1) to provide Internet communications services for field science work and mobile exploration systems; (2) to evaluate the range and throughput of three different medium-range radio link technologies for providing coverage of the crater area; and (3) to demonstrate collaborative software such as NetMeeting with multi-point video for exchange of scientific information between remote node and base-base camp and science centers as part of communications testing.

Alena, Rick; Gilbaugh, Bruce; Glass, Brian; Swanson, Keith (Technical Monitor)

2000-01-01