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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

Adaptive Autopilot Design for Missiles with Aerodynamic Parameters Rapidly Varying  

Microsoft Academic Search

An indirect adaptive control scheme is applied to the design of an autopilot for missiles with aerodynamic parameters rapidly varying. Controller design is based on the linearized model of missile motions. It is assumed that system parameters. are modelled as linear combinations of known bounded functions with unknown constant coefficients. Unknown coefficients are then estimated and based on the parameter

Chanho Song; E. W. Kamen; T. E. Bullock

1993-01-01

3

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

4

Estimating rapidly varying frequencies in the presence of noise  

SciTech Connect

A variable window length least-squares fitting and the interpolated fast Fourier transform methods are used to estimate the rapidly changing frequency of a signal with measurement noise. The least-squares method is computationally more expensive, but provides more accurate frequency estimates

Machorro, E.

2010-10-01

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

Adaptive channel estimation and equalization for rapidly mobile communication channels  

Microsoft Academic Search

This paper presents a reduced-complexity maximum-likelihood sequence estimation receiver, based on the Viterbi algorithm (VA), suitable for rapidly fading mobile communication channels. The channel impulse response is expanded onto a set of basis sequences and time-invariant (TI) expansion parameters. The proposed receiver continuously estimates the TI expansion parameters directly within the metric calculation of the VA. At every time instant

Ahmed El-sayed El-mahdy

2004-01-01

7

Rapid mobilization of cytotoxic lymphocytes induced by dasatinib therapy.  

PubMed

Tyrosine kinase inhibitors (TKIs) have potent effects on malignant cells, and they also target kinases in normal cells, which may have therapeutic implications. Using a collection of 55 leukemia patients treated with TKI therapy (chronic myeloid leukemia, n=47; acute lymphoblastic leukemia, n=8), we found that dasatinib, a second-generation broad-spectrum TKI, induced a rapid, dose-dependent and substantial mobilization of non-leukemic lymphocytes and monocytes in blood peaking 1-2 h after an oral intake and the blood counts closely mirrored drug plasma concentration. A preferential mobilization was observed for natural killer (NK), NK T, B and ??+ T cells. Mobilization was coupled with a more effective transmigration of leukocytes through an endothelial cell layer and improved cytotoxicity of NK cells. Platelet numbers decreased markedly after the drug intake in a proportion of patients. Similar effects on blood cell dynamics and function were not observed with any other TKI (imatinib, nilotinib and bosutinib). Thus, dasatinib induces a unique, rapid mobilization and activation of cytotoxic, extravasation-competent lymphocytes, which may not only enhance antileukemia immune responses but can also be causally related to the side-effect profile of the drug (pleural effusions, thrombocytopenia). PMID:23192016

Mustjoki, S; Auvinen, K; Kreutzman, A; Rousselot, P; Hernesniemi, S; Melo, T; Lahesmaa-Korpinen, A-M; Hautaniemi, S; Bouchet, S; Molimard, M; Smykla, R; Lee, F Y; Vakkila, J; Jalkanen, S; Salmi, M; Porkka, K

2013-04-01

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

Recursive adaptive algorithms for fast and rapidly time-varying systems  

Microsoft Academic Search

In this paper, some new schemes are developed to improve the tracking performance for fast and rapidly time-varying systems. A generalized recursive least-squares (RLS) algorithm called the trend RLS (T-RLS) algorithm is derived which takes into account the effect of local and global trend variations of system parameters. A bank of adaptive filters implemented with T-RLS algorithms are then used

Yuanjin Zheng; Zhiping Lin

2003-01-01

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

Rapid Prototyping of Mobile ContextAware Applications: The Cyberguide Case Study  

E-print Network

Rapid Prototyping of Mobile Context­Aware Applications: The Cyberguide Case Study Sue Long, Rob, Cyberguide, has as its main focus the rapid prototyping of hand­ held mobile applications in order to assess present the Cyberguide project, in which we are building prototypes of a mobile context­aware tour guide

Abowd, Gregory D.

12

Patterns and dynamics of rapid local adaptation and sex in varying habitat types in rotifers.  

PubMed

Local adaptation is an important principle in a world of environmental change and might be critical for species persistence. We tested the hypothesis that replicated populations can attain rapid local adaptation under two varying laboratory environments. Clonal subpopulations of the cyclically parthenogenetic rotifer Brachionus calyciflorus were allowed to adapt to two varying harsh and a benign environment: a high-salt, a food-limited environment and untreated culture medium (no salt addition, high food). In contrast to most previous studies, we re-adjusted rotifer density to a fixed value (two individuals per ml) every 3-4 days of unrestricted population growth, instead of exchanging a fixed proportion of the culture medium. Thus our dilution regime specifically selected for high population growth during the entire experiment and it allowed us to continuously track changes in fitness (i.e., maximum population growth under the prevailing conditions) in each population. After 56 days (43 asexual and eight sexual generations) of selection, the populations in the harsh environments showed a significant increase in fitness over time relative to the beginning compared to the population in untreated culture medium. Furthermore, the high-salt population exhibited a significantly elevated ratio of sexual offspring from the start of the experiment, which suggested that this environment either triggered higher rates of sex or that the untreated medium and the food-limited environment suppressed sex. In a following assay of local adaptation we measured population fitness under "local" versus "foreign" conditions (populations adapted to this environment compared to those of the other environment) for both harsh habitats. We found significantly higher fitness values for the local populations (on average, a 38% higher fitness) compared to the foreign populations. Overall, local adaptation was formed rapidly and it seemed to be more pronounced in the high-salt treatment. PMID:24324875

Scheuerl, Thomas; Stelzer, Claus-Peter

2013-10-01

13

Rapid Prototyping a Collections-based Mobile Wayfinding Application  

Microsoft Academic Search

This research presents the results of a project that investigated how students use a library developed mobile app to locate books in the library. The study employed a methodology of formative evaluation so that the development of the mobile app would be informed by user preferences for next generation wayfinding systems. A key finding is the importance of gathering ongoing

Jim Hahn; Alaina Morales

2011-01-01

14

Rapid reconstruction of small objects on mobile phones  

Microsoft Academic Search

Augmented Reality (AR) on mobile phones is receiving more and more attention recently, becoming a popular research topic and an important commercial field. In this paper we present a lightweight method to create coarse 3D models of small-scale objects. The goal is to give the users the possibility to create and maintain AR content themselves without the need for expensive

Andreas Hartl; Lukas Gruber; Clemens Arth; Stefan Hauswiesner; Dieter Schmalstieg

2011-01-01

15

Integrating rapid risk mapping and mobile phone call record data for strategic malaria elimination planning  

PubMed Central

Background As successful malaria control programmes re-orientate towards elimination, the identification of transmission foci, targeting of attack measures to high-risk areas and management of importation risk become high priorities. When resources are limited and transmission is varying seasonally, approaches that can rapidly prioritize areas for surveillance and control can be valuable, and the most appropriate attack measure for a particular location is likely to differ depending on whether it exports or imports malaria infections. Methods/Results Here, using the example of Namibia, a method for targeting of interventions using surveillance data, satellite imagery, and mobile phone call records to support elimination planning is described. One year of aggregated movement patterns for over a million people across Namibia are analyzed, and linked with case-based risk maps built on satellite imagery. By combining case-data and movement, the way human population movements connect transmission risk areas is demonstrated. Communities that were strongly connected by relatively higher levels of movement were then identified, and net export and import of travellers and infection risks by region were quantified. These maps can aid the design of targeted interventions to maximally reduce the number of cases exported to other regions while employing appropriate interventions to manage risk in places that import them. Conclusions The approaches presented can be rapidly updated and used to identify where active surveillance for both local and imported cases should be increased, which regions would benefit from coordinating efforts, and how spatially progressive elimination plans can be designed. With improvements in surveillance systems linked to improved diagnosis of malaria, detailed satellite imagery being readily available and mobile phone usage data continually being collected by network providers, the potential exists to make operational use of such valuable, complimentary and contemporary datasets on an ongoing basis in infectious disease control and elimination. PMID:24512144

2014-01-01

16

An improved water-filling algorithm for mobile MIMO communication systems over time-varying fading channels  

Microsoft Academic Search

Multiple input multiple output (MIMO) systems that use antenna arrays at both the transmitter and receiver are gaining much more attention and efforts in wireless communication research due to their potential to increase considerably capacity in mobile cellular communications. However, in the real propagation environment of cellular communications, it is difficult to gain the ideal ergodic capacity for time-varying fading

Ligang Ren; Zhijie Yan; Mei Song; Junde Song

2004-01-01

17

Generalized gradient approximation bridging the rapidly and slowly varying density regimes: A PBE-like functional for hybrid interfaces  

Microsoft Academic Search

We propose a generalized gradient approximation constructed for hybrid interfaces, which is based on the Perdew, Burke, Ernzerhof (PBE) functional form and interpolates between the rapidly PBE and slowly varying (PBEsol, the revised PBE for solid-state systems) density regimes. This functional approximation (named PBEint) recovers the right second-order gradient expansion of the exchange energy and is accurate for jellium surfaces,

Eduardo Fabiano; Lucian A. Constantin; Fabio Della Sala

2010-01-01

18

Rapid building damage assessment system using mobile phone technology  

NASA Astrophysics Data System (ADS)

One common scenario during disasters such as earthquakes is that the activity of damage field reconnaissance on site is not well-coordinated. For example in Italy the damage assessment of structures after an earthquake is managed from the Italian Emergency Authority, using printed forms (AeDES) which are filled by experts on site generating a lot of confusion in filling and transferring the forms to the Disaster Management Operative Center. Because of this, the paper explores the viability of using mobile communication technologies (smart phones) and the Web to develop response systems that would aid communities after a major disaster, providing channels for allowing residents and responders of uploading and distributing information, related to structural damages coordinating the damage field reconnaissance. A mobile application that can be run by residents on smart phones has been developed, to give an initial damage evaluation of the area, which is going to be very useful when resources (e.g. the number of experts is limited). The mobile application has been tested for the first time during 2012 Emilia earthquake to enhance the emergency response, showing the efficiency of the proposed method in statistical terms comparing the proposed procedure with the standard procedure.

Cimellaro, Gian Paolo; Scura, G.; Renschler, C. S.; Reinhorn, A. M.; Kim, H. U.

2014-09-01

19

Rapidly varying A-type stars in the SuperWASP archive  

NASA Astrophysics Data System (ADS)

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 here the results of a survey, using SuperWASP photometry, of over 1.5 million A-type stars in the search for high-frequency pulsations. We are able to detect pulsations down to the 0.5 mmag level in the broad-band photometry. That sensitivity enabled the discovery of several rapidly oscillating Ap (roAp) stars, and over 200 ? Scuti stars with frequencies above 50 d^{-1}. Such a large number of results allows us to study statistically the frequency overlap between roAp and ? Scuti stars.

Holdsworth, D. L.; Smalley, B.

2014-11-01

20

Rapid auditory processing and MGN morphology in microgyric rats reared in varied acoustic environments.  

PubMed

Adult male rats with induced microgyric lesions exhibit significant deficits in rapid auditory processing, as well as morphological alterations in the medial geniculate nucleus (MGN) of the thalamus. These findings are considered striking in light of similar anatomical and auditory processing anomalies in language disabled humans. Given evidence from clinical and animal studies that acoustic experience may alter sensory processing at behavioral and neurophysiological levels, the current study examined effects of developmental exposure to auditory stimulation on behavioral and anatomical indices in microgyric and sham rats. Stimulation (E7-P 70) included: (1). chronic white noise (80 dB) with standard housing; (2). 3 h/day of 78 dB filtered light classical music with social housing; or (3). standard acoustic environment (control) with standard housing. Microgyric effects on auditory processing and thalamic morphology were evident regardless of environmental condition. In sum, the effects of microgyria on brain and behavior appear to be robust, and largely orthogonal to any main effect of acoustic stimulation on auditory processing. These findings suggest that a more active form of acoustic stimulation (e.g., training) may be required to ameliorate the deleterious behavioral and anatomical consequences of focal microgyric lesions. PMID:12354646

Peiffer, Ann M; Rosen, Glenn D; Fitch, R Holly

2002-10-20

21

Improving the mobility of CuPc OFETs by varying the preparation conditions  

NASA Astrophysics Data System (ADS)

In this work, three different preparation conditions were used for testing the performance of p-conducting copper phthalocyanine (CuPc) organic field-effect transistors (OFETs). The charge carrier mobility ( ? sat=(1.5±0.6)×10-3 cm2/V s) of the CuPc OFETs with the CuPc film deposited while keeping the substrate at room temperature could be improved when the gate dielectric was modified by a self-assembled monolayer of n-octadecyltrichlorosilane ( ? sat=(3.8±0.4)×10-3 cm2/V s) or when elevated temperatures were applied to the substrate ( T S,av=127 ?C) during the deposition of the organic film ( ? sat=(6.5±0.8)×10-3 cm2/V s). For the latter case, the dependence of the mobility and threshold voltage with increasing thickness of the organic film was tested—above 13 nm film thickness, no further significant increase of the hole mobility or change in the threshold voltage could be observed. The environmental stability of the OFETs was checked by performing ex situ measurements immediately as the sample was exposed to atmosphere and after 40 days of exposure. The effect of the different preparation conditions on the morphology of the organic films prepared in this work is also discussed in this context.

Korodi, Iulia G.; Lehmann, Daniel; Hietschold, Michael; Zahn, Dietrich R. T.

2013-06-01

22

Fast-responder: Rapid mobile-phone access to recent remote sensing imagery for first responders  

NASA Astrophysics Data System (ADS)

We introduce Fast-Responder, a novel prototype data-dissemination application and architecture concept to rapidly deliver remote sensing imagery to smartphones to enable situational awareness. The architecture implements a Fast-Earth image caching system on the phone and interacts with a Fast-Earth server. Prototype evaluation successfully demonstrated that National Guard users could select a location, download multiple remote sensing images, and flicker between images, all in less than a minute on a 3G mobile commercial link. The Fast-Responder architecture is a significant advance that is designed to meet the needs of mobile users, such as National Guard response units, to rapidly access information during a crisis, such as a natural or man-made disaster. This paper focuses on the architecture design and advanced user interface concepts for small-screens for highly active mobile users. Novel Fast-Responder concepts can also enable rapid dissemination and evaluation of imagery on the desktop, opening new technology horizons for both desktop and mobile users.

Talbot, L. M.; Talbot, B. G.

23

Rapid Mobilization of Membrane Lipids in Wheat Leaf-Sheaths during Incompatible Interactions with Hessian Fly*  

PubMed Central

Hessian fly (HF) is a biotrophic insect that interacts with wheat on a gene-for-gene basis. We profiled changes in membrane lipids in two isogenic wheat lines: a susceptible line and its backcrossed offspring containing the resistance gene H13. Our results revealed a 32 to 45% reduction in total concentrations of 129 lipid species in resistant plants during incompatible interactions within 24 h after HF attack. A smaller and delayed response was observed in susceptible plants during compatible interactions. Microarray and real-time PCR analyses of 168 lipid-metabolism related transcripts revealed that the abundance of many of these transcripts increased rapidly in resistant plants after HF attack, but did not change in susceptible plants. In association with the rapid mobilization of membrane lipids, the concentrations of some fatty acids and 12-oxo-phytodienoic acid (OPDA) increased specifically in resistant plants. Exogenous application of OPDA increased mortality of HF larvae significantly. Collectively, our data, along with previously published results, indicate that the lipids were mobilized through lipolysis, producing free fatty acids, which were likely further converted into oxylipins and other defense molecules. Our results suggest that rapid mobilization of membrane lipids constitutes an important step for wheat to defend against HF attack. PMID:22668001

Zhu, Lieceng; Liu, Xuming; Wang, Haiyan; Khajuria, Chitvan; Reese, John C.; Whitworth, R. Jeff; Welti, Ruth; Chen, Ming-Shun

2013-01-01

24

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

25

Ion mobility spectrometry for the rapid analysis of over-the-counter drugs and beverages  

PubMed Central

In the pharmaceutical industry, there are increasing requirements for analytical methods in quality assessment for the production of drugs. In this investigation, ion mobility spectrometry (IMS) was used for the rapid qualitative separation and identification of active ingredients in generic over-the-counter drugs and food additives in beverages. The active ingredients determined in drugs were acetaminophen, aspartame, bisacodyl, caffeine, dextromethorphan, diphenhydramine, famotidine, glucosamine, guaifenesin, loratadine, niacin, phenylephrine, pyridoxine, thiamin, and tetrahydrozoline. Aspartame and caffeine were determined in beverages. Fourteen over-the-counter drugs and beverages were analyzed. Analysis times below 10 s were obtained for IMS, and reduced mobilities were reported for the first time for 12 compounds. A quadrupole mass spectrometer coupled to a mobility spectrometer was used to assure a correct peak assignation. The combination of fast analysis, low cost, and inexpensive maintenance of IMS instruments makes IMS an attractive technique for the qualitative determination of the active ingredients in over-the-counter drugs and food additives in manufacture quality control and cleaning verification for the drug and food industries. PMID:20835390

Fernandez-Maestre, Roberto

2009-01-01

26

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

27

RAPID  

Cancer.gov

Rapid Access to Preventive Intervention Development (RAPID) Program About RAPID Description and Objectives of the Program Oversight RAPID Is Not... Frequently Asked Questions Application Information Format of Applications Address for Applications

28

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

29

Angiogenic cells can be rapidly mobilized and efficiently harvested from the blood following treatment with AMD3100  

PubMed Central

Circulating endothelial progenitor cells (EPCs) are thought to contribute to angiogenesis following vascular injury, stimulating interest in their ability to mediate therapeutic angiogenesis. However, the number of EPCs in the blood is low, limiting endogenous repair, and a method to rapidly mobilize EPCs has not been reported. In this study, healthy donors were mobilized sequentially with the CXCR4 antagonist, AMD3100, and G-CSF. The number of EPCs and circulating angiogenic cells (CACs) in the blood and pheresis product was determined and the angiogenic capacity of each cell population assessed. Compared with baseline, treatment with AMD3100 or G-CSF increased the number of blood CACs 10.0-fold ± 4.4-fold and 8.8-fold ± 3.7-fold, respectively. The number of EPCs in the blood increased 10.2-fold ± 3.3-fold and 21.8-fold ± 5.4-fold, respectively. On a percell basis, CACs harvested from G-CSF–mobilized blood displayed increased in vivo angiogenic potential compared with AMD3100-mobilized CACs. Mobilized EPCs displayed a greater proliferative capacity than EPCs isolated from baseline blood. Both CACs and EPCs were efficiently harvested by leukapheresis. Cryopreserved CACs but not EPCs retained functional activity after thawing. These data show that AMD3100 is a potent and rapid mobilizer of angiogenic cells and demonstrate the feasibility of obtaining and storing large numbers of angiogenic cells by leukapheresis. PMID:16912220

Shepherd, Rebecca M.; Capoccia, Benjamin J.; Devine, Steven M.; DiPersio, John; Trinkaus, Kathryn M.; Ingram, David; Link, Daniel C.

2006-01-01

30

Rapid analysis of lubricants by atmospheric solid analysis probe-ion mobility mass spectrometry.  

PubMed

Formulated lubricants are complex mixtures composed of base oil(s) and additives with various functions (detergents, corrosion inhibiter, antioxidant, viscosity modifiers, etc.). Because of the aliphatic nature of base oil and the chemical diversity of additives, the characterization of lubricant is currently a long and complex process. The comprehensive analysis of lubricant samples involves several techniques such as nuclear magnetic resonance, mass spectrometry, chromatography and infrared spectroscopy. The coupling of atmospheric solid analysis probe (ASAP) with ion mobility-mass spectrometry (IM-MS) has been shown to be an efficient tool for the characterization of complex mixture containing vaporizable polar to non-polar compounds. This approach affords the coupling of a direct ionization technique that does not require sample preparation, with a bi-dimensional separation method with high peak capacity. In this work, we show that ASAP-IM-MS is a suitable method for rapid and direct characterization of lubricant samples. Indeed, base oil and additives yielded, by ASAP, ions series which could be separated by IM-MS. Molecular additives such as Zn-dithiocarbamate, phosphite, thiophosphate and Alkyl diphenylamine were ionized as molecular ions [M](+•) or protonated molecules [M?+?H](+), depending of their polarity. In some cases, fragment ions were observed, confirming the additive identification. In addition, high molecular weight polymeric additives such as poly(alkyl methacrylate) (PAM) were pyrolized in the ASAP source leading to characteristic fragment ions. ASAP-IM-MS is shown to be a powerful tool for studying complex mixtures, allowing the first comprehensive analysis of lubricants in just a few minutes. PMID:25044898

Barrère, Caroline; Hubert-Roux, Marie; Afonso, Carlos; Racaud, Amandine

2014-08-01

31

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

32

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

PubMed

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. PMID:25215819

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

2014-08-01

33

Rapidly growing tropical trees mobilize remarkable amounts of nitrogen, in ways that differ surprisingly among species  

PubMed Central

Fast-growing forests such as tropical secondary forests can accumulate large amounts of carbon (C), and thereby play an important role in the atmospheric CO2 balance. Because nitrogen (N) cycling is inextricably linked with C cycling, the question becomes: Where does the N come from to match high rates of C accumulation? In unique experimental 16-y-old plantations established in abandoned pasture in lowland Costa Rica, we used a mass-balance approach to quantify N accumulation in vegetation, identify sources of N, and evaluate differences among tree species in N cycling. The replicated design contained four broad-leaved evergreen tree species growing under similar environmental conditions. Nitrogen uptake was rapid, reaching 409 (±30) kg?ha?1?y?1, double the rate reported from a Puerto Rican forest and greater than four times that observed at Hubbard Brook Forest (New Hampshire, USA). Nitrogen amassed in vegetation was 874 (±176) kg?ha?1, whereas net losses of soil N (0–100 cm) varied from 217 (±146) to 3,354 (±915) kg?ha?1 (P = 0.018) over 16 y. Soil C:N, ?13C values, and N budgets indicated that soil was the main source of biomass N. In Vochysia guatemalensis, however, N fixation contributed >60 kg?ha?1?y?1. All species apparently promoted soil N turnover, such that the soil N mean residence time was 32–54 y, an order of magnitude lower than the global mean. High rates of N uptake were associated with substantial N losses in three of the species, in which an average of 1.6 g N was lost for every gram of N accumulated in biomass. PMID:22689942

Russell, Ann E.; Raich, James W.

2012-01-01

34

[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

35

Neural-adaptive control of single-master-multiple-slaves teleoperation for coordinated multiple mobile manipulators with time-varying communication delays and input uncertainties.  

PubMed

In this paper, adaptive neural network control is investigated for single-master-multiple-slaves teleoperation in consideration of time delays and input dead-zone uncertainties for multiple mobile manipulators carrying a common object in a cooperative manner. Firstly, concise dynamics of teleoperation systems consisting of a single master robot, multiple coordinated slave robots, and the object are developed in the task space. To handle asymmetric time-varying delays in communication channels and unknown asymmetric input dead zones, the nonlinear dynamics of the teleoperation system are transformed into two subsystems through feedback linearization: local master or slave dynamics including the unknown input dead zones and delayed dynamics for the purpose of synchronization. Then, a model reference neural network control strategy based on linear matrix inequalities (LMI) and adaptive techniques is proposed. The developed control approach ensures that the defined tracking errors converge to zero whereas the coordination internal force errors remain bounded and can be made arbitrarily small. Throughout this paper, stability analysis is performed via explicit Lyapunov techniques under specific LMI conditions. The proposed adaptive neural network control scheme is robust against motion disturbances, parametric uncertainties, time-varying delays, and input dead zones, which is validated by simulation studies. PMID:24808577

Li, Zhijun; Su, Chun-Yi

2013-09-01

36

Interspecific comparisons of lymph volume and lymphatic fluxes: do lymph reserves and lymph mobilization capacities vary in anurans from different environments?  

PubMed

The femoral lymph sac volumes and lymph mobilization capacity were compared in three anuran species that span a range of environments, dehydration tolerance, ability to maintain blood volume with dehydration, and degrees of development of skeletal muscles putatively involved in moving lymph vertically to the posterior lymph hearts. The femoral lymph sac volume determined by Evans blue injection and dilution in the femoral lymph sac varied interspecifically. The semiaquatic species, Lithobates catesbeianus, had the greatest apparent lymph volume expressed either as 18.7 mL kg body mass?¹ or 94 mL kg thigh mass?¹, compared with both the terrestrial and aquatic species, Rhinella marina (7.3 mL kg body mass?¹ and 57 mL kg thigh mass?¹) and Xenopus laevis (6.5 mL kg body mass?¹ and 40 mL kg thigh mass?¹, respectively. Injections of Evans blue into the subvertebral lymph sac, which communicates with both pairs of lymph hearts, yielded the highest rates of lymph return to the circulation in all three species. The most terrestrial species had a greater rate of lymphatic return from the subvertebral lymph sac, compared with the other two species. The rate of lymph flux from the femoral sac varied interspecifically and was correlated with the number and development of skeletal muscles involved in lymph movement. The results indicated that the three species differ in both the volume of lymph present and the capacity to return lymph. Lymph flux was correlated with habitat and the ability to maintain blood volume when challenged by dehydration or hemorrhage, whereas femoral lymph volume was not correlated with these factors. PMID:21527817

Hillman, Stanley S; Drewes, Robert C; Hedrick, Michael S; Withers, Philip C

2011-01-01

37

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

38

Rapid mobilization of hematopoietic progenitors by AMD3100 and catecholamines is mediated by CXCR4-dependent SDF-1 release from bone marrow stromal cells  

PubMed Central

Steady-state egress of hematopoietic progenitor cells can be rapidly amplified by mobilizing agents such as AMD3100, the mechanism, however, is poorly understood. We report that AMD3100 increased the homeostatic release of the chemokine SDF-1 to the circulation in mice and non-human primates. Neutralizing antibodies against CXCR4 or SDF-1 inhibited both steady-state and AMD3100-induced SDF-1 release and reduced egress of murine progenitor cells over mature leukocytes. Intra-bone injection of biotinylated SDF-1 also enhanced release of this chemokine and murine progenitor cell mobilization. AMD3100 directly induced SDF-1 release from CXCR4+ human bone marrow osteoblasts and endothelial cells and activated uPA in a CXCR4/JNK-dependent manner. Additionally, ROS inhibition reduced AMD3100-induced SDF-1 release, activation of circulating uPA and mobilization of progenitor cells. Norepinephrine treatment, mimicking acute stress, rapidly increased SDF-1 release and progenitor cell mobilization, while ?2-adrenergic antagonist inhibited both steady-state and AMD3100-induced SDF-1 release and progenitor cell mobilization in mice. In conclusion, this study reveals that SDF-1 release from bone marrow stromal cells to the circulation emerges as a pivotal mechanism essential for steady state egress and rapid mobilization of hematopoietic progenitor cells, but not mature leukocytes. PMID:21494253

Kalinkovich, Alexander; Itkin, Tomer; Ludin, Aya; Kao, Wei-Ming; Battista, Michela; Tesio, Melania; Kollet, Orit; Cohen, Neta Netzer; Margalit, Raanan; Buss, Eike C.; Baleux, Francoise; Oishi, Shinya; Fujii, Nobutaka; Larochelle, Andre; Dunbar, Cynthia E.; Broxmeyer, Hal E.; Frenette, Paul S.; Lapidot, Tsvee

2014-01-01

39

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

40

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

Page 1 Abstract In the near future, off-road mobile robots will feature high levels of autonomy applications have a special demand for robots to possess similar qualities to man-driven machines: high speed approaches that model the soil as a mass-spring system, where the soil granules are considered as point

Kelly, Alonzo

41

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

42

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

43

Varying constants.  

PubMed

We review properties of theories for the variation of gravitation and fine structure 'constants'. We highlight some general features of the cosmological models that exist in these theories with reference to recent quasar data that are consistent with time variation in the fine structure constant since a redshift of 3.5. The behaviour of a simple class of varying-alpha cosmologies is outlined in the light of all the observational constraints. PMID:16147502

Barrow, John D

2005-09-15

44

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

45

A mobile systems perspective on vehicular networks  

Microsoft Academic Search

To date the vehicular networks community has primarily focused on designing vehicle-to-vehicle communication systems that can communicate reliably in environments with high mobility and rapidly varying vehicle density. As standards for vehicular communications are maturing, it is becoming increasingly important to understand how these communication systems can and should interact with other technologies in vehicular systems. Vehicles have become rich

Marco Gruteser

2012-01-01

46

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

47

Make a Mobile!  

NSDL National Science Digital Library

In this activity, learners make mobiles to explore the concepts of balance, counterbalance, weight, and counterweight. Learners are encouraged to work in groups or with their families to create balanced mobiles using a variety of materials of varying weights.

Museum, Chicago C.

2010-01-01

48

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

49

Time varying networks and the weakness of strong ties  

NASA Astrophysics Data System (ADS)

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.

Karsai, Márton; Perra, Nicola; Vespignani, Alessandro

2014-02-01

50

Mobile radio propagation in built-up areas: a numerical model of slow fading  

Microsoft Academic Search

A model of mobile radio propagation over buildings is proposed, enabling prediction of sector median field strength and its variability with varying building setups. The model predicts diffraction over building rooftops by combining ray methods with a novel method of multiple knife edge diffraction calculation suitable for applications requiring rapid computation. This technique is rapid and flexible enough to permit

S. R. Saunders; F. R. Bonar

1991-01-01

51

Rapid detection and identification of impurities in ten 2-naphthalenamines using an atmospheric pressure solids analysis probe in conjunction with ion mobility mass spectrometry.  

PubMed

The atmospheric pressure solids analysis probe (ASAP), in conjunction with ion mobility time-of-flight mass spectrometry (IM-ToF-MS), has been applied to the impurity profiling study of ten 2-naphthalenamines. The impurity profiles achieved by ASAP-IM-MS were compared with those obtained by liquid chromatography-electrospray ionisation-mass spectrometry (LC-ESI-MS). All the impurities at the level of 0.1 area % and above, except for one, detected by LC-ESI-MS, were also found by ASAP-IMS analyses. In addition, one non-polar compound was detected by ASAP-IM-MS alone. The IM-MS plot of ion drift time versus m/z values offered sufficient separation between the impurities with different m/z. Therefore, instead of LC as a separation tool, IM-MS is able to provide fingerprint profiling for the ten samples analysed. The time of each analysis has been reduced from 25 min by LC-MS to less than 3 min by ASAP-IM-MS. When collision energy was applied for the selected precursor ion in the transfer T-wave, a clean MS/MS spectrum was obtained for structural elucidation of unknown impurities. The hyphenation of ASAP and IM-MS techniques represents a highly efficient approach for rapid detection and identification of impurities generated in complex reactions involved in pharmaceutical development. PMID:21828413

Pan, Hefeng; Lundin, Göran

2011-01-01

52

Towards universal mobile caching  

Microsoft Academic Search

In the context of mobile data access, data caching is fundamental for both performance and functionality. For this reason there have been many studies into developing energy-efficient caching algorithms suitable for specific mobile environments. In this papers, we present a novel caching policy, Universal Mobile Caching (UMC), which is suitable for managing object caches in structurally varying environments, and which

Ganesh Santhanakrishnan; Ahmed Amer; Panos K. Chrysanthis

2005-01-01

53

Rapid screening of precursor and degradation products of chemical warfare agents in soil by solid-phase microextraction ion mobility spectrometry (SPME–IMS)  

Microsoft Academic Search

The use of solid-phase microextraction (SPME) coupled to ion mobility spectrometry (IMS) to detect precursor and degradation products of chemical warfare agents (CWAs) as soil contaminants was investigated. The development and characterization of a system to interface a thermal desorption solid-phase microextraction inlet with a hand held ion mobility spectrometer was demonstrated. The analytes used in this study were diisopropyl

Preshious Rearden; Peter B. Harrington

2005-01-01

54

The Rapidly Deployable Radio Network  

E-print Network

The Rapidly Deployable Radio Network (RDRN) is an architecture and experimental system to develop and evaluate hardware and software components suitable for implementing mobile, rapidly deployable, and adaptive wireless ...

Evans, Joseph B.; Minden, Gary J.; Shanmugan, K. S.; Prescott, Glenn Eugene; Frost, Victor S.; Ewy, Ben; Sanchez, Ricardo; Sparks, Craig; Malinimohan, K.; Roberts, James A.; Plumb, R. G.; Petr, Dave

1999-04-01

55

Intragenerational Job Mobility in a Period of Rapidly Rising Inequality: The Case of the Mid-Career Men in the Czech Republic int he 1990s  

E-print Network

or lower education (=comparison category). Social class is asocial class is still an important factor that shapes individuals’ lives. Skills and educationsocial classes, the service class also witnesses a low risk of upward occupational mobility. The impact of education

Hamplova, Dana; Kreidl, Martin

2005-01-01

56

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

E-print Network

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 the Mobile Subject Assistant (MSA), a proposed mobile phone based course tool. The tool is intended to assist

Rubinstein, Benjamin

57

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

58

The Research on Dynamic Self-Adaptive Network Security Model Based on Mobile Agent  

Microsoft Academic Search

The rapid development and wide application of computer networks presents a new challenge to information security and network security. Traditional security models and single security technology cannot keep up with the change of complicated network structure and varied intrusion measures. Network security management based on policy has traits of low management cost, high agility and wide applicability. The mobile agent

Jiang Tao; Liu Ji-ren; Qin Yang

2000-01-01

59

Prototyping mobile game applications  

Microsoft Academic Search

Abstract: Mobile game devices today include novel features, such as ad - hoc wireless connections, advanced audio and visuals, and peer - to - peer networking Using these devices to design new game concepts, however, can be difficult and take much time We have developed OpenTrek - a free, Rapid Application Development game platform for mobile devices OpenTrek is to

Johan Sanneblad; Lars Erik Holmquist

2002-01-01

60

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

61

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

62

Requirements for mobile photoware  

Microsoft Academic Search

What is the future of digital imaging? Mobile imaging technologies have been changing rapidly and will continue to do so. We explore new developments in cam- eraphone photography with the goal of improving the design of the next generation of mobile imaging devices. We equipped 26 diverse participants with cameraphones, photo uploading and sharing software, and access to online photo-accounts

Morgan Ames; Dean Eckles; Mor Naaman; Mirjana Spasojevic; Nancy A. Van House

2010-01-01

63

Mobile web applications: bringing mobile apps and web together  

Microsoft Academic Search

The popularity of mobile applications is very high and still growing rapidly. These applications allow their users to stay connected with a large number of service providers in seamless fashion, both for leisure and productivity. But service prThe popularity of mobile applications is very high and still growing rapidly. These applications allow their users to stay connected with a large

Marie-Claire Forgue; Dominique Hazaël-Massieux

2012-01-01

64

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

PubMed Central

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

65

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

66

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

67

Mobile data and transaction management  

Microsoft Academic Search

Mobile computing paradigm has emerged due to advances in wireless or cellular networking technology. This rapidly expanding technology poses many challenging research problems in the area of mobile database systems. The mobile users can access information independent of their physical location through wireless connections. However, accessing and manipulating information without restricting users to specific locations complicates data processing activities. There

Sanjay Kumar Madria; Mukesh K. Mohania; Sourav S. Bhowmick; Bharat K. Bhargava

2002-01-01

68

Time-Varying Quantiles  

E-print Network

A time-varying quantile can be fitted to a sequence of observations by formulating a time series model for the corresponding population quantile and iteratively applying a suitably modified state space signal extraction algorithm. Quantiles...

Harvey, Andrew C; De Rossi, Giuliano

69

A mobile-based home automation system  

Microsoft Academic Search

The rapidly advancing mobile communication technology and the decrease in costs make it possible to incorporate mobile technology into home automation systems. We propose a mobile-based home automation system that consists of a mobile phone with Java capabilities, a cellular modem, and a home server. The home appliances are controlled by the home server, which operates according to the user

M. Van Der Werff; X. Gui; W. L. Xu

2005-01-01

70

Rapid Behavioral Response to Corticosterone Varies with Photoperiod and Dose  

Microsoft Academic Search

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

C. W. Breuner; J. C. Wingfield

2000-01-01

71

Partially Coherent Detection in Rapidly Time Varying Channels  

E-print Network

a partially coherent detector for both noncoherent frequency shift keying (FSK) and differential phase shift schemes like differential phase shift keying (DPSK) and noncoherent frequency shift keying (FSK keying (PSK) that exploits partial channel knowledge to enable the receiver to operate effectively

Jafar, Syed A.

72

Understanding the behavior of mobile data services consumers  

Microsoft Academic Search

Due to rapid advances in the Internet and wireless technologies, a ubiquitous computing world is becoming a reality in the form of mobile computing. At the center of this phenomenon is mobile data services which arise from the convergence of advanced mobile communication technologies with data services. Despite the rapid growth in mobile data services, research into consumers’ usage behavior

Se-joon Hong; James Y. L. Thong; Jae-Yun Moon; Kar Yan Tam

2008-01-01

73

Rapid tooling  

Microsoft Academic Search

Rapid tooling can be seen as the second wave in rapid prototyping because, with rapid tooling, the production process can be prototyped instead of the final product. This article discusses and compares several existing processes available for rapid tooling. For each process, the product size and the number of shots is estimated. Since this text was part of the Internet

Eric Radstok

1999-01-01

74

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

75

Study of Mobile Payment Business Model Based on Third-Party Mobile Payment Service Provider  

Microsoft Academic Search

With the fast developing mobile commerce, mobile payment is springing up as a new industry. It is obvious that replacing traditional cash or bank card with mobile will cause a payment revolution. However, some factors such as individual demand, rapid change of external market environment, complicated industry chain, and numerous business models are barrels of a successful mobile payment. This

Guoling Lao; Hanbing Liu

2011-01-01

76

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

E-print Network

Mobile Computing/Mobile Computing/Mobile Computing/Mobile Computing/ Mobile NetworksMobile NetworksMobile NetworksMobile Networks Mobile IP Prof. Chansu Yu Quiz What is the role of IP? Does the router have two IP for Wired Network Mobile IP Overview Basic Mobile IP Agent Discovery Registration Tunneling Route

Yu, Chansu

77

Health risks from the use of mobile phones  

Microsoft Academic Search

Widespread concerns have been raised about the possibility that exposure to the radiofrequency (RF) fields from mobile telephones or their base stations could affect people's health. Such has been the rapid growth of mobile telecommunications that there will be about one billion mobile phone users before 2005. Already there are more mobile than fixed-line users. Developing countries are establishing mobile

Michael H. Repacholi

2001-01-01

78

Generate secure mobile agent by using SMS to protect Hosts  

Microsoft Academic Search

No doubt, the usages of mobile agent and mobile phone technologies are rapidly increased. The mobile agent has a promising room in the industry area. Unfortunately, this technology faces some security problems from mobile agents and hosts sides. This paper proposes a new model to protect Hosts (Service Providers) from malicious mobile agents. The main idea behind the model is

Tarig Mohamed Ahmed

2010-01-01

79

Quantizing the throughput reduction of IPSec with mobile IP  

Microsoft Academic Search

The demand for immediate and universal access to information is increasing rapidly, leading to the desire for mobile access to the Internet. The Mobile Internet Protocol (Mobile IP) provides mobility to Internet users with some basic security features that are insufficient. Internet Protocol Security (IPSec) brings security to the network, but uses more bandwidth. The desire for mobility does not

Dnyanesh Khatavkar; E. Rena Hixon; Ravi Pendse

2002-01-01

80

Mobile Education through Camera-Equipped Mobile Phones  

Microsoft Academic Search

This paper proposes augmented learning contents (ALC) that can supply learners with dynamic interactions using multimedia information by recognizing real images of off-line contents using mobile devices. The techniques employed allow children to rapidly gain access to a large repository of multimedia information through the use of a camera- equipped mobile phone. Especially, there are many usages of external marks

EunJung Han; HwangKyu Yang; Keechul Jung

2007-01-01

81

Mobile Search with Multimodal Queries  

Microsoft Academic Search

The popularity of mobile devices, such as PDAs and SmartPhones, has grown rapidly over the last couple of years. Though most users still perform searches using desktop computers, it is expected that more and more people will also search the Web while they are on the move. In addition to text-based keyword queries, mobile devices can support richer and hybrid

Xing Xie; Lie Lu; Menglei Jia; Hua Li; Frank Seide; Wei-Ying Ma

2008-01-01

82

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

83

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

84

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

85

Contextual queries express mobile information needs  

Microsoft Academic Search

The users of mobile devices increasingly use networked services to address their information needs. Questions asked by mobile users are strongly influenced by contextual factors such as location, conversation and activity. We report on a diary study performed to better understand mobile information needs. We find that the type of questions recorded by participants varies across their locations, with differences

Annika M. Hinze; Carole Chang; David M. Nichols

2010-01-01

86

Experimental Analysis of AODV & DSR over TCP & CBR Connections with Varying Speed and Node Density in VANET  

E-print Network

Vehicular adhoc network or VANET is special types of adhoc network consists of moving cars referred to as nodes; provide a way to exchange any information between cars without depending on fixed infrastructure. For efficient communication between nodes various routing protocols and mobility models have been proposed based on different scenarios. Due to rapid topology changing and frequent disconnection makes it difficult to select suitable mobility model and routing protocols. Hence performance evaluation and comparison between routing protocols is required to understand any routing protocol as well as to develop a new routing protocol. In this research paper, the performance of two on-demand routing protocols AODV & DSR has been analyzed by means of packet delivery ratio, loss packet ratio & average end-to-end delay with varying speed limit and node density under TCP & CBR connection.

Paul, Bijan; Bikas, Md Abu Naser

2012-01-01

87

Pre-Emptive Channel Assignment Scheme with Fair Queue Scheduling in Evolving Mobile Networks  

Microsoft Academic Search

Due to rapid evolution in Mobile Cellular Industry (MCI) there is an increase in complexity when using mobility management techniques during the design, commissioning and operations of mobile networks. 1 G methodology can no longer be adopted or applied for 2G and\\/or 3G mobile networks. Therefore, existing mobility management techniques need to evolve with the technological evolution in mobile networks

Atta-Ul-Qudoos; Asfand-E. Yar; Irfan-ullah Awan

2008-01-01

88

Consumer Attitudes Toward Mobile Advertising: An Empirical Study  

Microsoft Academic Search

The rapid proliferation of mobile phones and other mobile devices has cre- ated a new channel for marketing. The use of Short Messaging Service to access custom- ers through their handheld devices is gaining popularit y, making the mobile phone the ultimate medium for one-to-one marketing. The present research investigates consumer attitudes toward mobile advertising and the relationship between attitude

Melody M. Tsang; Shu-Chun Ho; Ting-Peng Liang

2004-01-01

89

Location-Assisted Handover for Multimode Mobile Terminals  

Microsoft Academic Search

Present day mobile networks and terminals are rapidly evolving. Wireless networks are evolving towards heterogeneous overlaying infrastructure, while the mobile terminals towards having multimode functionality. Traditional horizontal handover decision mechanisms that mainly depend on signal strength for decision making are unable to realize ubiquitous and seamless mobility across heterogeneous networks as well as true multimode functionality in mobile terminals. Use

Tansir Ahmed; Kyandoghere Kyamakya; Markus Ludwig; Michael Schielein; Stephen McCann; Eleanor Hepworth; Abigail Surtees

90

Increasing Mobile Transaction Concurrency in Dynamically Configurable Environments  

Microsoft Academic Search

The topology of a mobile ad hoc network (MANET) may change randomly and rapidly at unpredictable time, since nodes are free to move arbitrarily. In such an environment, we may have a collection of autonomous, distributed, heterogeneous and mobile databases (denoted mobile database community or MDBC). This paper describes an approach for controlling concurrency of mobile transactions executed in MDBCs.

Angelo Brayner; José De Aguiar Moraes Filho

2005-01-01

91

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

92

Time-Varying Graphs and Dynamic Networks Arnaud Casteigts  

E-print Network

in proceedings of the 10th International Conference on Adhoc Networks and Wireless (Adhoc-Now'11). 1 hal-00847001Time-Varying Graphs and Dynamic Networks Arnaud Casteigts , Paola Flocchini , Walter Quattrociocchi ar- eas of dynamic systems ­ delay-tolerant networks, opportunistic-mobility networks, social

Paris-Sud XI, Université de

93

A Turning Point Analysis from Mobile Web 1.0 to Mobile Web 2.0: Lessons from Mobile Content Start-Up Company Growth and Downturn in Japan  

Microsoft Academic Search

The rapid growth of the mobile Internet in Japan leveraged new content providers specializing in the mobile Web. With the saturation of the Japanese mobile Internet, many content providers have faced downturns in the new landscape. Some exceptions provide hints for turning point analysis, and new directions for consumer-based mobile business. The author describes the current mobile Internet business model

Toshihiko Yamakami

2008-01-01

94

Adaptive, robotic and mobile sensor systems for structural assessment Dryver Huston*a  

E-print Network

, mobile assessment, health monitoring, complex systems 1. INTRODUCTION The design and implementation1 Adaptive, robotic and mobile sensor systems for structural assessment Dryver Huston*a , Jonathan, rapidly deployable sensors and mobile sensors. Adaptive signal processing is where the processing

Huston, Dryver R.

95

The Interactive Effects of Pulsed Grazing Disturbance and Patch Size Vary among Wetland Arthropod Guilds  

PubMed Central

Pulse disturbances and habitat patch size can determine community composition independently or in concert, and may be particularly influential on small spatial scales for organisms with low mobility. In a field experiment, we investigated whether the effects of a pulsed disturbance that simulated a grazing event varied with habitat patch size. We focused on the short-term responses of multiple co-occurring emergent salt marsh arthropods with differing levels of mobility and dispersal potential. As part of a marsh restoration project, two types of emergent marsh structures were created: small circular mounds (0.5 m diameter) separated by several meters of aquatic habitat, and larger, elongated terraces (>50 m long). Study plots (0.25 m2) were established on both structures; in a subset of plots, we simulated a pulsed grazing disturbance event by clipping the aboveground tissue of emergent plants, primarily Spartina alterniflora. At the end of the two-month recovery period, Ischnodemus (Hemiptera: Blissidae) density was over 50% lower in disturbed treatments within both large (terrace) and small (mound) patches. Predatory spider treatment responses were similar to Ischnodemus responses, suggesting a trophic relationship between those two arthropod groups. Alternatively, spiders may have been directly affected by the loss of shelter in the disturbed plots. Prokelisia (Homoptera: Delphacidae), which are generally more mobile than Ischnodemus, were not affected by disturbance treatment or by patch size, suggesting the potential for rapid recolonization following disturbance. Larval stem borers decreased by an order of magnitude in disturbed plots, but only in the large patches. In general, the disturbance effects of vegetation removal on arthropod density and community composition were stronger than patch size effects, and there were few interactions between pulsed disturbance and patch size. Rather, emergent marsh arthropod responses to disturbance and habitat area treatments were linked to the dispersal potential and mobility of each individual taxon. PMID:24116133

Armitage, Anna R.; Ho, Chuan-Kai; Quigg, Antonietta

2013-01-01

96

Least-Squares Channel Estimation Assisted by Self-Interference Cancellation for Mobile PRP-OFDM Applications  

Microsoft Academic Search

A least-squares (LS) channel estimation (CE) technique is investigated in this paper in order to apply pseudo-random-postfix orthogonal-frequency-division multiplexing (PRP-OFDM) communications onto mobile applications, operating on a rapidly time-varying frequency-selective fading channel. The proposed technique takes advantage of several self- interference cancellation (SIC) methods to effectively and timely reduce multipath interference (MPI), inter-symbol interference (ISI) and inter-block interference (IBI). Therefore,

Jia-chin Lin

2008-01-01

97

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

98

Mobile computing \\  

Microsoft Academic Search

Design competitions offer students an excellent way to gain hands-on experience in engineering and computer science courses. The University of Florida, in partnership with Motorola, has held two mobile computing design competitions. In Spring and Fall 2001, students in Abdelsalam Helal's Mobile Computing class designed killer apps for a Motorola smart phone.

S. F. Midkiff

2002-01-01

99

EBSCOhost Mobile  

Microsoft Academic Search

The explosive growth in mobile technology coupled with widespread adoption among students, librarians, medical professionals, and corporate users means that research database providers need to be where the users are. EBSCO host Mobile was designed and developed to provide EBSCO host database users with a platform that makes the power of EBSCO host and its content highly accessible on the

Ron Burns; Sara Rofofsky Marcus

2010-01-01

100

Situational Effects on the Usage Intention of Mobile Games  

Microsoft Academic Search

As value-added services on mobile devices are developing rapidly, text messaging, multi-media messaging, music, video, games,\\u000a GPS navigation, RFID, and mobile TV are all accessible from a single device. Mobile games that combine mobile communication\\u000a with computer games are an emerging industry. The purpose of this research is to explore what situation factors may affect\\u000a the intention to play mobile

Ting-Peng Liang; Yi-Hsuan Yeh

2009-01-01

101

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

102

Mobile Website Overview Mobile Application Development Policy  

E-print Network

of University Communication May 29, 2012 #12;Mobile Web/Mobile App Development Policy Villanova University May .......................................................................................................................... 12 #12;Mobile Web/Mobile App Development Policy Villanova University May 29, 2012 Page 3 of 13 I accesses the mobile web. Native apps, in contrast, are permanently downloaded to mobile devices and must

Jackman, Todd

103

An Adaptable Mobile Transaction Model Patricia Serrano-Alvarado, Claudia Roncancio, Michel Adiba, Cyril Labbe  

E-print Network

.g. mobile vendors/clients, health services, mobile offices, transport). We consider that mobile and fixedAn Adaptable Mobile Transaction Model Patricia Serrano-Alvarado, Claudia Roncancio, Michel Adiba'H`eres, France Abstract Mobile environments are characterized by high vari- ability (e.g. variable bandwidth

Paris-Sud XI, Université de

104

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

105

Get Your Mobile App Out the Door  

Microsoft Academic Search

\\u000a The increased speed and vast number of mobile products being released into the market has demanded that Oracle design and\\u000a develop mobile products faster. These applications must be innovative to stay competitive in the market place. We will present\\u000a a rapid design and research process that has been used to create a superior mobile expenses application. This process assisted\\u000a in

Heather Cottingham; Michele Snyder

106

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

107

A survey of mobile phone sensing  

Microsoft Academic Search

Mobile phones or smartphones are rapidly becoming the central computer and communication device in people's lives. Application delivery channels such as the Apple AppStore are transforming mobile phones into App Phones, capable of downloading a myriad of applications in an instant. Importantly, today's smartphones are programmable and come with a growing set of cheap powerful embedded sensors, such as an

Emiliano Miluzzo; Hong Lu; Daniel Peebles; Tanzeem Choudhury; Andrew T. Campbell

2010-01-01

108

Mobile health systems: A brief overview  

Microsoft Academic Search

Rapid advances in information technology and telecommunications, and more specifically wireless and mobile communications, and their convergence (telematics) are leading to the emergence of a new type of information infrastructure that has the potential of supporting an array of advanced services for healthcare. The objective of this paper is to provide a snapshot of the applications of mobile technology in

S. Voskarides; C. S. Pattichis; R. Istepanian; E. Kyriacou; M. S. Pattichis; C. N. Schizas

109

Mobile Services for the Hospitality Industry  

Microsoft Academic Search

Mobile services appear to be an obvious choice for travel and tourism as the travellers are on the move, which is the first criterion for mobile services to be relevant. The travel and tourism industry, which is one of the largest and most rapidly expanding industries in the world and one of the significant users of ICT in its operations,

Christer Carlsson; Joanna Carlsson; Pirkko Walden

2005-01-01

110

Mobile phones and health: A literature overview  

Microsoft Academic Search

The rapidly evolving mobile phone technology raised pu- blic concern about the possibility of associated adverse health effects. The current body of evidence is summarized addressing epidemiological studies, studies investigating adverse biological effects, other biological effects, basic mechanisms and indirect effects. Currently, the balance of evidence from epidemiological studies suggests that there is no association between mobile phone radiation and

Christian P. Karger

111

Mobile wireless computing: challenges in data management  

Microsoft Academic Search

Mobile computing is a new emerging computing paradigm posing many challenging data managementproblems. We identify these new challenges and investigate their technical significance. New researchproblems include management of location dependent data, information services to mobile users, frequentdisconnections, wireless data broadcasting, and energy efficient data access.1 IntroductionThe rapidly expanding technology of cellular communications, wireless LAN, and satellite services will...

Tomasz Imielinski; B. R. Badrinath

1994-01-01

112

Emerging customer trends towards mobile music services  

Microsoft Academic Search

Elaborating on the rapid evolution of mobile entertainment services, this paper investigates customers' preferences and attitudes towards mobile music services in Europe through an exploratory research approach. The study ran in Finland, United Kingdom and Greece, targeting both music consumers and music professionals. Significant differences were observed between the three countries in terms of the importance music consumers attach to

Pavlos Vlachos; Adam P. Vrechopoulos

2004-01-01

113

VPRS MODEL FOR MOBILE PHONE TEST PROCEDURE  

Microsoft Academic Search

Personal wireless communication is one of the fastest growing fields in the communications industry. The technology employed by mobile telecommunications is rapidly growing with shorter product life cycles, a shortening of time to market expectations, and a higher customer expectation of more capability for less cost. In mobile phone manufacturing, the radio frequency (RF) functional test process needs more operation

Jyh-Hwa Hsu; Tai-Lin Chiang; Huei-Chun Wang

2006-01-01

114

Dealing with mobility: understanding access anytime, anywhere  

Microsoft Academic Search

The rapid and accelerating move towards use of mobile technologies has increasingly provided people and organizations with the ability to work away from the office and on the move. The new ways of working afforded by these technologies are often characterized in terms of access to information and people anytime, anywhere. This article presents a study of mobile workers that

Mark Perry; Kenton O'hara; Abigail Sellen; Barry A. T. Brown; Richard H. R. Harper

2001-01-01

115

Canadian academic libraries and the mobile web  

Microsoft Academic Search

Purpose – The purpose of this paper is to assess how Canadian academic libraries have responded to the rapidly evolving mobile environment and to identify gaps in the services provided, while suggesting areas for future development. Design\\/methodology\\/approach – The paper conducted an examination of the mobile content and services provided by the libraries of the member institutions of the Association

Robin Canuel; Chad Crichton

2011-01-01

116

Mobile Collector for Field Trips  

ERIC Educational Resources Information Center

Current e-Learning is based on learning management systems that provide certain standard services--course authoring and delivery, tutoring, administration and collaboration facilities. Rapid development of mobile technologies opens a new area of m-Learning to enhance the current educational opportunities. Field trips are a relevant part of the…

Kravcik, Milos; Kaibel, Andreas; Specht, Marcus; Terrenghi, Lucia

2004-01-01

117

The Changing Role of Student Mobility  

ERIC Educational Resources Information Center

Student mobility often is perceived as a relatively well-documented growth trend of a phenomenon mostly viewed a highly desirable. A closer look, however, suggests that information is shaky in many respects and does not confirm consistent growth according to various criteria and measures. The purposes of mobility vary and also the respective…

Rivza, Baiba; Teichler, Ulrich

2007-01-01

118

Evolutionary Reinforcement Learning System with Time-Varying Parameters  

NASA Astrophysics Data System (ADS)

In this paper, an evolutionary reinforcement learning system with time-varying parameters that can learn appropriate policy in dynamical POMDPs is proposed. The proposed system has time-varying parameters that can be adjusted by using reinforcement learning. Hence, the system can adapt to the time variation of the dynamical environment even if its variation cannot be observed. In addition, the state space of the environment is divided evolutionarily. So, one need not to divide the state space in advance. The efficacy of the proposed system is shown by mobile robot control simulation under the environment belongs to dynamical POMDPs. The environment is the passage that has gates iterate opening and closing.

Umesako, Kosuke; Obayashi, Masanao; Kobayashi, Kunikazu

119

Why do trade costs vary?  

Microsoft Academic Search

As tariffs have fallen, it is apparent that trade costs are a significant obstacle to international trade and that they vary\\u000a from country to country. The gap between the cif and fob value of a trade flow is a useful measure of aggregate trade costs,\\u000a but only if the measure is based on a consistent volume of trade; mirror statistics

Richard Pomfret; Patricia Sourdin

2010-01-01

120

FORENSIC INVESTIGATION PROCESS MODEL FOR WINDOWS MOBILE DEVICES  

Microsoft Academic Search

Windows mobile device forensics is relatively a new field of interest among scientific and law enforcement communities. This paper describes the various processes involved in the forensic investigation of Windows mobile devices in the form of a twelve-stage model. The rapid technological advancements and increasing popularity of Windows mobile devices pose great challenges for investigators and law enforcement officials all

Anup Ramabhadran

121

Activation of Home Automation System via Mobile Technology  

Microsoft Academic Search

The rapidly advancing mobile communication technology and the decrease in costs make it possible to incorporate mobile technology into home automation systems. Based on an SMS\\/GPRS (Short Message Ser- vice\\/General Packet Radio Service) mobile cell module and a micro- controller, a home automation server can be established, allowing a user to control and monitor any variables related to the home

M J Van Der Werff; W L Xu

122

Measuring Integrity on Mobile Phone Systems Divya Muthukumaran  

E-print Network

Measuring Integrity on Mobile Phone Systems Divya Muthukumaran Systems and Internet Infrastructure Park, PA 16802 tjaeger@cse.psu.edu ABSTRACT Mobile phone security is a relatively new field that is gather- ing momentum in the wake of rapid advancements in phone system technology. Mobile phones are now

Yener, Aylin

123

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

124

Fast app launching for mobile devices using predictive user context  

Microsoft Academic Search

As mobile apps become more closely integrated into our everyday lives, mobile app interactions ought to be rapid and responsive. Unfortunately, even the basic primitive of launching a mobile app is sorrowfully sluggish: 20 seconds of delay is not uncommon even for very popular apps. We have designed and built FALCON to remedy slow app launch. FALCON uses contexts such

Tingxin Yan; David Chu; Deepak Ganesan; Aman Kansal; Jie Liu

2012-01-01

125

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

126

Identity and Global Mobility  

Microsoft Academic Search

\\u000a This chapter examines how identity is related to the mobility of professionals who initiate expatriation. In this context\\u000a a “professional” has a multifaceted identity in which career (a personal identity), family (a role identity) and cultural\\u000a selves (a collective identity) are combined. These components vary in the degree to which they affect the motivation to expatriate\\u000a or repatriate.\\u000a \\u000a \\u000a Having a

Phyllis Tharenou

127

A Mobile Tool for Learning English Words  

ERIC Educational Resources Information Center

Technology is changing very rapidly and nearly all branches of education are affected by these changes. As a result of these rapid changes there has been significant interest and growth in the number of educational institutions using mobile devices to support learning and teaching. There is also an increase use of wireless technologies in…

Cavus, Nadire; Ibrahim, Dogan

2008-01-01

128

Designing for the evolution of mobile contacts application  

Microsoft Academic Search

We describe the design drivers, prototype and one-month field study results of a mobile contacts application incorporating new features and design elements. The design was inspired by 8 hypotheses on the potential new uses of a mobile contacts application. A total of 16 users from varying age groups and prior experiences with mobile phones participated in the trial of a

Younghee Jung; Akseli Anttila; Jan Blom

2008-01-01

129

LETTER doi:10.1038/nature12991 Rapid remobilization of magmatic crystals kept in  

E-print Network

-rich magma are often suggested to require the mobilization of magma stored at near-solidus conditions6- ditions of magma storage are widespread and therefore that rapid mobilization of magmas stored at near-solidus

Cai, Long

130

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

131

Concept of time varying binary symmetric model-channel uncertainty modeling  

Microsoft Academic Search

In this paper, we develop the concept of time varying binary symmetric channel (TV-BSC) model, a basic model that shows a non-trivial influence on capacity due to the channel uncertainty and characterizes the important attributes of more general time varying mobile communications channels. That an influence of the channel uncertainty is captured serves to significantly differentiate the model from other

Zarko B. Krusevac; Predrag B. Rapajic; Rodney A. Kennedy

2004-01-01

132

Do G-CSF mobilized, peripheral blood-derived stem cells from healthy, HLA-identical donors really engraft more rapidly than do G-CSF primed, bone marrow-derived stem cells? No!  

Microsoft Academic Search

For more than a decade, the notion that peripheral blood-derived stem cells engraft more rapidly than bone marrow-derived stem cells after high-dose therapy has dominated our thinking. Recently, reports that granulocyte colony-stimulating factor (G-CSF) induces a proteolytic marrow microenvironment have provided mechanistic support for that belief, compelling us to review our own experience of 29 consecutive transplants with HLA-identical blood

Gerald J Elfenbein; Robert Sackstein; David J Oblon

2004-01-01

133

Mars Mobiles  

NSDL National Science Digital Library

This activity introduces students to the basic features of the Mars landscape. Students locate the planets of the solar system on a diagram; look at pictures of Mars and describe the Martian landscape; describe landscape features of Earth, and compare those to what is found on Mars; and make mobiles showing features of the Martian landscape.

134

Mobility 2035  

E-print Network

addresses the mobility needs of the Study Area to the year 2035 in the following chapters: 1) Demographic Development 2) Scenario Analysis 3) Public Involvement 4) Bicycle System 5) Pedestrian System 6) Public Transportation 7) Roadway Needs 8... ------------------------------------------------------------------------------------------ ES-1 SAFETEA-LU Planning Factors----------------------------------------------------------------- ES-2 Metropolitan Transportation Plan Mission Statement ------------------------------------- ES-3 Metropolitan Transportation Plan Goals...

San Antonio-Bexar County Metropolitan Planning Organization

2009-12-07

135

Anchored Mobilities: Mobile Technology and Transnational Migration  

E-print Network

Anchored Mobilities: Mobile Technology and Transnational Migration Amanda Williams Donald Bren.m [Information Systems]: miscellaneous General Terms Design, Human Factors. Keywords Mobilility, mobile technology, transnational, aging, ethnography 1. INTRODUCTION Researchers in Human Computer Interaction have

Dourish,Paul

136

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

137

SVM-based spectrum mobility prediction scheme in mobile cognitive radio networks.  

PubMed

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

Wang, Yao; Zhang, Zhongzhao; Ma, Lin; Chen, Jiamei

2014-01-01

138

Mobile Gamification in EducationEngage, Educate and Entertain via Gamified Mobile Apps  

Microsoft Academic Search

Digital games are very popular amongst the digital natives; they use them for entertainment engagement, enjoyment and fun. With the emergence of the internet and mobile apps edutainment and gamification is also becoming increasingly important in the educational sector. With the rapid development of mobile technologies and applications, games are now entering a new era where their purpose is no

Ferial Khaddage; Christoph Lattemann; Ricardo Acosta-Díaz

2014-01-01

139

Nice Mobile Services do not Fly. Observations of Mobile Services and the Finnish Consumers  

Microsoft Academic Search

When the short message service (SMS), was first initiated in 1992 nobody could foresee its tremendous popularity. Simple in design, easy to adapt and effortless to employ it rapidly became a profitable, matchless, globally used mobile service – referred to as a “killer application”. Ever since the quest for the next mobile service “killer application” has continued. Year after year

Christer Carlsson; Joanna Carlsson; Jussi Puhakainen; Pirkko Walden

2006-01-01

140

Design and implementation of high performance mobile game on embedded device  

Microsoft Academic Search

As mobile game grows rapidly in recent years, it becomes one of the new economic contributors to the game market. However the low-powered mobile device is the main barrier for the quick development of mobile game. Through mobile billiards game on the e868 mobile phone of the Bird-company, a game development framework for low performance mobile device is designed in

Bailin Yang; Zhiyong Zhang

2010-01-01

141

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

142

HIV care for geographically mobile populations.  

PubMed

The interaction between geographic mobility and risk for human immunodeficiency virus infection is well recognized, but what happens to those same individuals, once infected, as they transition to living with the infection? Does mobility affect their transition into medical care? If so, do mobile and nonmobile populations achieve similar success with antiretroviral treatment? The definition of mobility has changed over the centuries to encompass a complex phenotype including permanent migration, frequent travel, circular migration, and travel to and from treatment centers. The heterogeneity of these definitions leads to discordant findings. Investigations show that mobility has an impact on infection risk, but fewer data exist on the impact of geographic mobility on medical care and treatment outcomes. This review will examine existing data regarding the impact of geographic mobility on access to and maintenance in medical care and on adherence to antiretroviral therapy for those living with human immunodeficiency virus infection. It will also expand the concept of mobility to include data on the impact of the distance from residence to clinic on medical care and treatment adherence. Our conclusions are that the existing literature is limited by varying definitions of mobility and the inherent oversimplification necessary to apply a "mobility measure" in a statistical analysis. The impact of mobility on antiretroviral treatment outcomes deserves further exploration to both define the phenomenon and target interventions to these at-risk populations. PMID:21598261

Taylor, Barbara S; Garduño, L Sergio; Reyes, Emily V; Valiño, Raziel; Rojas, Rita; Donastorg, Yeycy; Brudney, Karen; Hirsch, Jennifer

2011-01-01

143

Mobile phones affect multiple sperm quality traits: a meta-analysis  

PubMed Central

As mobile phone usage is growing rapidly, there is a need for a comprehensive analysis of the literature to inform scientific debates about the adverse effects of mobile phone radiation on sperm quality traits. Therefore, we conducted a meta-analysis of the eligible published research studies on human males of reproductive age. Eleven studies were eligible for this analysis. Based on the meta-analysis, mobile phone use was significantly associated with deterioration in semen quality (Hedges’s g = -0.547; 95% CI: -0.713, -0.382; p < 0.001). The traits particularly affected adversely were sperm concentration, sperm morphology, sperm motility, proportion of non-progressive motile sperm (%), proportion of slow progressive motile sperm (%), and sperm viability. Direct exposure of spermatozoa to mobile phone radiation with in vitro study designs also significantly deteriorated the sperm quality (Hedges’s g = -2.233; 95% CI: -2.758, -1.708; p < 0.001), by reducing straight line velocity, fast progressive motility, Hypo-osmotic swelling (HOS) test score, major axis (µm), minor axis (µm), total sperm motility, perimeter (µm), area (µm 2), average path velocity, curvilinear velocity, motile spermatozoa, and  acrosome reacted spermatozoa (%). The strength of evidence for the different outcomes varied from very low to very high. The analysis shows that mobile phone use is possibly associated with a number of deleterious effects on the spermatozoa. PMID:24327874

Dama, Madhukar Shivajirao

2013-01-01

144

'Podracing': experimenting with mobile TV content consumption and delivery methods  

Microsoft Academic Search

Recently, mobile TV has been launched in several countries. While mobile TV integrates television contents into mobile phones,\\u000a the most personal of communication devices, it becomes interesting to know how this feature will be used throughout the day\\u000a and in varying contexts of everyday life. This paper presents empirical results on the use of mobile TV with different delivery\\u000a mechanisms

Virpi Oksman; Ville Ollikainen; Elina Noppari; Carlos Herrero; Antti Tammela

2008-01-01

145

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

146

Mobile-Agent versus Client\\/Server Performance: Scalability in an Information-Retrieval Task  

Microsoft Academic Search

. Building applications with mobile agents often reduces thebandwidth required for the application, and improves performance. Thecost is increased server workload. There are, however, few studies of thescalability of mobile-agent systems. We present scalability experimentsthat compare four mobile-agent platforms with a traditional client\\/serverapproach. The four mobile-agent platforms have similar behavior, buttheir absolute performance varies with underlying implementation...

Robert S. Gray; David Kotz; Ronald A. Peterson; Joyce Barton; Daria A. Chacón; Peter Gerken; Martin O. Hofmann; Jeffrey M. Bradshaw; Maggie R. Breedy; Renia Jeffers; Niranjan Suri

2001-01-01

147

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

148

Atomic Mobile  

NSDL National Science Digital Library

In this hands-on OLogy activity, kids learn about matter by building their own models of carbon out of pipe cleaners, wire, and clay. The activity begins with a kid-friendly introduction to matter, elements, and atoms. The illustrated, step-by-step directions show how to use the information about carbon on the Periodic Table to create a mobile that shows the element's basic structure. A PDF version of the Periodic Table, along with a kid-friendly overview of how to read it, is also included.

149

Holographic flow visualization of time-varying shock waves  

NASA Astrophysics Data System (ADS)

Rapid-double-exposure, diffuse-illumination holography is evaluated analytically and experimentally as a flow visualization method for time-varying shock waves. Conditions are determined that minimize the distance (localization error) between the surface or curve of interference-fringe localization and the shock surface. Treated specifically are the cases of shock waves in a transonic compressor rotor for which there is laser anemometer data for comparison and shock waves in a flutter cascade.

Decker, A. J.

1981-09-01

150

Holographic flow visualization of time-varying shock waves.  

PubMed

Rapid-double-exposure, diffuse-illumination holography is evaluated analytically and experimentally as a flow visualization method for time-varying shock waves. Conditions are determined that minimize the distance (localization error) between the surface or curve of interference-fringe localization and the shock surface. Treated specifically are the cases of shock waves in a transonic compressor rotor for which there is laser anemometer data for comparison and shock waves in a flutter cascade. PMID:20333110

Decker, A J

1981-09-15

151

Holographic flow visualization of time-varying shock waves  

Microsoft Academic Search

Rapid-double-exposure, diffuse-illumination holography is evaluated analytically and experimentally as a flow visualization method for time-varying shock waves. Conditions are determined that minimize the distance (localization error) between the surface or curve of interference-fringe localization and the shock surface. Treated specifically are the cases of shock waves in a transonic compressor rotor for which there is laser anemometer data for comparison

A. J. Decker

1981-01-01

152

Rapid prototyping of rapid prototyping machines  

E-print Network

Rapid prototyping tools empower individuals to create almost anything. Unfortunately, these tools are still far too expensive for personal ownership. The do-it-yourself community has responded with a slew of home-made rapid ...

Moyer, Ilan Ellison

2008-01-01

153

Mobile Atmospheric Sensing using Vision Approach  

NASA Astrophysics Data System (ADS)

Air quality monitoring, especially the atmospheric phenomenon of thick haze, has been an acute problem in most countries and a hot topic in the atmospheric sensing. Recently thick haze occurs more frequently in most cities of China due to the rapid growth of traffic, farming, wildfires, and industrial development. It forms a low-hanging shroud that impairs visibility and becomes a respiratory health threat. Traditionally the dust, smoke, and other particles in relatively dry sky are reported at fixed meteorological stations. The coverage of these sampling stations is limited and cannot accommodate with the emergent incidence of thick haze from industrial pollution. In addition, the visual effect of thick haze is not yet investigated in the current practice. Thick haze appears colorful veil (e.g., yellowish, brownish-grey, etc) in video log images and results in a loss of contrast in the subject due to the light scattering through haze particles. This paper proposes an intuitive and mobile atmospheric sensing using vision approach. Based on the video log images collected by a mobile sensing vehicle, a Haze Veil Index (HVI) is proposed to identify the type and severity level of thick haze from the color and texture perspective. HVI characterizes the overall veil effect of haze spatially. HVI first identifies the haze color from the color deviation histogram of the white-balanced hazy image. The white-balancing is conducted with the most haze-opaque pixels in the dark channel and seed growing strategy. Then pixel-wise haze severity level of atmospheric veil is inferred by approximating the upper veil limit with the dark color of each pixel in a hazy image. The proposed method is tested on a diverse set of actual hazy video log images under varying atmospheric conditions and backgrounds in Wuhan City, China. Experimental results show the proposed HVI is effective for visually atmospheric sensing. The proposed method is promising for haze monitoring and prediction in UAV and satellite remote-sensing images.

Huang, Yuchun; Cui, Weihong; Rui, Yi

2014-03-01

154

Mobile video stories  

Microsoft Academic Search

The aim of this article is to test how different narrative structures work in mobile video storytelling applications for creative arts. Especially, we are interested in stories made with the mobile phone and for the mobile phone i.e. they are supposed to be viewed on the mobile phone. In addition, we present a new mobile social video service and demo

Jari Multisilta; Marjo Mäenpää

2008-01-01

155

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

156

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

157

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

158

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

159

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

160

MOBILE PROXIMITY PAYMENT: ECOSYSTEM  

E-print Network

MOBILE PROXIMITY PAYMENT: ECOSYSTEM AND OVERVIEW OF NFC TECHNOLOGY 1. Introduction Handsets confirm and heterogeneous. The Mobile Payment ecosystem involves a number of partners, such as: · banks; · Mobile Network

Shamos, Michael I.

161

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

162

Note: Integration of trapped ion mobility spectrometry with mass spectrometry  

PubMed Central

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.

2011-01-01

163

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

164

Contagion dynamics in time-varying metapopulation networks  

NASA Astrophysics Data System (ADS)

The metapopulation framework is adopted in a wide array of disciplines to describe systems of well separated yet connected subpopulations. The subgroups/patches are often represented as nodes in a network whose links represent the migration routes among them. The connections are usually considered as static, an approximation that is appropriate for the description of many systems, such as cities connected by human mobility, but it is obviously inadequate in those real systems where links evolve in time on a faster timescale. In the case of farmed animals, for example, the connections between each farm/node vary in time according to the different stages of production. Here we address this case by investigating simple contagion processes on temporal metapopulation networks. We focus on the SIR process, and we determine the mobility threshold for the onset of an epidemic spreading in the framework of activity-driven network models. Remarkably, we find profound differences from the case of static networks, determined by the crucial role played by the dynamical parameters defining the average number of instantaneously migrating individuals. Our results confirm the importance of addressing the time-varying properties of complex networks pointed out by the recent literature.

Baronchelli, Andrea; Liu, Suyu; Perra, Nicola

2013-03-01

165

Anomalous diffusion due to hindering by mobile obstacles undergoing Brownian motion or Orstein-Ulhenbeck processes  

NASA Astrophysics Data System (ADS)

In vivo measurements of the passive movements of biomolecules or vesicles in cells consistently report "anomalous diffusion," where mean-squared displacements scale as a power law of time with exponent ? <1 (subdiffusion). While the detailed mechanisms causing such behaviors are not always elucidated, movement hindrance by obstacles is often invoked. However, our understanding of how hindered diffusion leads to subdiffusion is based on diffusion amidst randomly located immobile obstacles. Here, we have used Monte Carlo simulations to investigate transient subdiffusion due to mobile obstacles with various modes of mobility. Our simulations confirm that the anomalous regimes rapidly disappear when the obstacles move by Brownian motion. By contrast, mobile obstacles with more confined displacements, e.g., Orstein-Ulhenbeck motion, are shown to preserve subdiffusive regimes. The mean-squared displacement of tracked protein displays convincing power laws with anomalous exponent ? that varies with the density of Orstein-Ulhenbeck (OU) obstacles or the relaxation time scale of the OU process. In particular, some of the values we observed are significantly below the universal value predicted for immobile obstacles in two dimensions. Therefore, our results show that subdiffusion due to mobile obstacles with OU type of motion may account for the large variation range exhibited by experimental measurements in living cells and may explain that some experimental estimates are below the universal value predicted for immobile obstacles.

Berry, Hugues; Chaté, Hugues

2014-02-01

166

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

167

Strategic analysis of mobile money ventures in Developing countries  

E-print Network

Mobile money services are spreading rapidly in many developed and developing countries across the world. Whereas in developed economies these new services are seen as a way to make current services more functional and ...

Caballero, Luis (Luis Alberto Caballero Parra)

2012-01-01

168

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

169

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

170

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

171

Gender-based Grouping of Mobile Student Societies  

Microsoft Academic Search

The next frontier for sensor networks is sensing the human society. Several mobile societies are emerging, especially with wide deployment of wireless LANs (WLANs) on campuses. With the rapid increase in WLAN deployment come various research challenges. WLAN traces pertaining to network usage contain very useful information and can provide us with a lot of insight about mobile user behavior

Udayan Kumar; Nikhil Yadav; Ahmed Helmy

172

THE MOBILE FAMILY GALLERY? GENDER, MEMORY AND THE CAMERAPHONE  

Microsoft Academic Search

This article suggests that the study of memory in the 21st century needs to be understood within a rapidly developing techno-social context that includes wearable and portable mobile technologies. Drawing on a pilot study involving depth interviews on camera phone use by women and men in London in 2006, the paper addresses how mobile camera phones are being used to

Anna Reading

2008-01-01

173

A Tabletop System for supporting Paper Prototyping of Mobile Interfaces  

E-print Network

that supports rapid paper-based prototyping for mobile applications. Our sys- tem combines the possibilityA Tabletop System for supporting Paper Prototyping of Mobile Interfaces Benjamin Bähr, Sven Kratz prototypes, but also enables the generation of prototype applications able to run on target devices

174

Going wireless: behavior & practice of new mobile phone users  

Microsoft Academic Search

We report on the results of a study in which 19 new mobile phone users were closely tracked for the first six weeks after service acquisition. Results show that new users tend to rapidly modify their perceptions of social appropriateness around mobile phone use, that actual nature of use frequently differs from what users initially predict, and that comprehension of

Leysia Palen; Marilyn C. Salzman; Ed Youngs

2000-01-01

175

Discovery and Integration of Mobile Communications in Everyday Life  

Microsoft Academic Search

We report on the results of a study in which 19 new mobile telephone users were closely tracked for the first six weeks after service acquisition. Results show that novices tend to rapidly modify their perceptions of social appropriateness around mobile phone use, that actual nature of use frequently differs from initial predictions, and that comprehension of service-based technologies can

Leysia Palen; Marilyn C. Salzman; Ed Youngs

2001-01-01

176

International Mobility of Canadian Social Sciences and Humanities Doctoral Students  

ERIC Educational Resources Information Center

International academic mobility is an aspect of internationalization that is changing rapidly in terms of volume, scope, and impact. Although much of the attention and research on mobility has focused on undergraduate students participating in short-term study abroad, internships, and exchange experiences, the new push to develop international…

Knight, Jane; Madden, Meggan

2010-01-01

177

2013 UEC Tokyo. Real-time Mobile Food  

E-print Network

of Processing Time Extract SURF food region(bounding box) Adjust bounding box Estimate direction Only once 2013 UEC Tokyo. Real-time Mobile Food Recognition System Yoshiyuki Kawano and Keiji Yanai. · Recording of food habits has become popular. ­ by using PC or mobile phone ­ quite troublesome task. · Rapid

Yanai, Keiji

178

Friendship Based Routing in Delay Tolerant Mobile Social Networks  

E-print Network

as a result of the rapid and wide spread usage of different kinds of devices (e.g., cell phones, GPS devicesFriendship Based Routing in Delay Tolerant Mobile Social Networks Eyuphan Bulut and Boleslaw K of DTNs are mobile social networks (MSN) also called pocket switched networks. Hence, analyzing accurately

Varela, Carlos

179

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

180

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

181

Personalized Intelligent Mobile Learning System for Supporting Effective English Learning  

ERIC Educational Resources Information Center

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

Chen, Chih-Ming; Hsu, Shih-Hsun

2008-01-01

182

Globalization and International Student Mobility: A Network Analysis  

ERIC Educational Resources Information Center

This article analyzes changes to the network of international student mobility in higher education over a 10-year period (1999-2008). International student flows have increased rapidly, exceeding 3 million in 2009, and extensive data on mobility provide unique insight into global educational processes. The analysis is informed by three theoretical…

Shields, Robin

2013-01-01

183

Surviving Java for mobiles  

Microsoft Academic Search

Mobile devices are gaining popularity worldwide, and constant hardware improvement is increasing their computational power every year. So, we can now equip mobile devices with more powerful applications. One of the most promising software platforms for mobile devices is Java 2 Micro Edition. Sun representatives assert that 18 to 20 million mobile phones support the J2ME platform. Analysts predict that

Dmitry S. Kochnev; Andrey A. Terekhov

2003-01-01

184

Varying electric charge in multiscale spacetimes  

NASA Astrophysics Data System (ADS)

We derive the covariant equations of motion for Maxwell field theory and electrodynamics in multiscale spacetimes with weighted Laplacian. An effective spacetime-dependent electric charge of geometric origin naturally emerges from the theory, thus giving rise to a varying fine-structure constant. The theory is compared with other varying-coupling models, such as those with a varying electric charge or varying speed of light. The theory is also confronted with cosmological observations, which can place constraints on the characteristic scales in the multifractional measure. We note that the model considered here is fundamentally different from those previously proposed in the literature, either of the varying-e or varying-c persuasion.

Calcagni, Gianluca; Magueijo, João; Fernández, David Rodríguez

2014-01-01

185

Mobilization of seed protein reserves.  

PubMed

The mobilization of seed storage proteins upon seed imbibition and germination is a crucial process in the establishment of the seedling. Storage proteins fold compactly, presenting only a few vulnerable regions for initial proteolytic digestion. Evolutionarily related storage proteins have similar three-dimensional structure, and thus tend to be initially cleaved at similar sites. The initial cleavage makes possible subsequent rapid and extensive breakdown catalyzed by endo- and exopeptidases. The proteolytic enzymes that degrade the storage proteins during mobilization identified so far are mostly cysteine proteases, but also include serine, aspartic and metalloproteases. Plants often ensure early initiation of storage protein mobilization by depositing active proteases during seed maturation, in the very compartments where storage proteins are sequestered. Various means are used in such cases to prevent proteolytic attack until after imbibition of the seed with water. This constraint, however, is not always enforced as the dry seeds of some plant species contain proteolytic intermediates as a result of limited proteolysis of some storage proteins. Besides addressing fundamental questions in plant protein metabolism, studies of the mobilization of storage proteins will point out proteolytic events to avoid in large-scale production of cloned products in seeds. Conversely, proteolytic enzymes may be applied toward reduction of food allergens, many of which are seed storage proteins. PMID:22017287

Tan-Wilson, Anna L; Wilson, Karl A

2012-05-01

186

Browsing as the killer app: Explaining the rapid success of Apple's iPhone  

Microsoft Academic Search

Since the mid-1990s, the mobile phone industry has sought widespread adoption of mobile data services, envisioning a new “mobile Internet” with its own complex value network delivered through smartphone terminals. With its iPhone, Apple rapidly gained smartphone market share while spurring widespread adoption of mobile data services in the United States.Here it is argued that the success of the iPhone

Joel West; Michael Mace

2010-01-01

187

Essays on Mobile Advertising and Commerce  

E-print Network

become ever more ubiquitous and powerful. Many of the market structures that enable mobile commerce are still under rapid development and afford us opportunities to ask new questions about market design. This thesis examines three such markets and mechanisms that drive advertising platforms and application stores

Chen, Yiling

188

MAC Sleep Mode Control Considering Downlink Traffic Pattern and Mobility  

E-print Network

1 MAC Sleep Mode Control Considering Downlink Traffic Pattern and Mobility Neung-Hyung Lee energy loss under varying traffic pattern and mobile environment. In this paper, we propose a sleep mode-- energy saving, sleep mode, doze state. I. INTRODUCTION In wireless communications, the battery power

Bahk, Saewoong

189

Network-Aware Adaptation Techniques for Mobile File Systems  

Microsoft Academic Search

Wireless networks present unusual challenges for mobile le system clients, since they are characterised by unpredictable connectivity and widely-varying bandwidth. The traditional ap- proach to adapting network communication to these conditions is to write back le updates asynchronously when bandwidth is low. Unfortunately, this can lead to underutilisation of band- width and inconsistencies between clients. We describe a new mobile

Benjamin Atkin; Kenneth P. Birman

2006-01-01

190

Smartphones Enabling Mobile Collaboration  

Microsoft Academic Search

Mobilization of the work-force is demanding new mobile and wireless technologies to facilitate contact between the growing number of mobile eWorkers and organizations. Smartphones incorporating mobile e-mail functionality enable instant access to e-mail boxes and company resources without complex synchronization. A study amongst sixteen German companies was conducted to elicit the influence of mobile e-mail on work-processes and communication. The

Bettina Beurer-zuellig; Miriam Meckel

2008-01-01

191

Mobile IPv6 Security  

Microsoft Academic Search

Mobile IPv6 provides global mobility and location management support for the IPv6 network layer protocol. The design of Mobile IPv6 incorporates security features that differ significantly from its predecessor, Mobile IPv4. Some of the new security features are intended to counter new threats raised by route optimization, while others align Mobile IPv6 security more closely with basic IPv6 security mechanisms.

James Kempf; Jari Arkko; Pekka Nikander

2004-01-01

192

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

193

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

194

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

195

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.

196

Adaptive Extraction of Time-Varying Isosurfaces  

Microsoft Academic Search

We present an algorithm for adaptively extracting and render- ing isosurfaces from compressed time-varying volume datasets. Tetrahedral meshes defined by longest edge bisection are used to create a multiresolution representation of the volume in the spatial domain that is adapted over time to approximate the time- varying volume. The reextraction of the isosurface at each time step is accelerated with

Benjamin F. Gregorski; Joshua G. Senecal; Mark A. Duchaineau; Kenneth I. Joy

2004-01-01

197

Novel shock absorber features varying yield strengths  

NASA Technical Reports Server (NTRS)

A shock absorbent webbing of partially drawn synthetic strands is arranged in sections of varying density related to the varying mass of the human body. This is contoured to protect the body at points of contact, when subjected to large acceleration or deceleration forces.

Geier, D. J.

1964-01-01

198

Binding of Proteins to Copolymers of Varying  

E-print Network

Binding of Proteins to Copolymers of Varying Hydrophobicity Jeff Y. Gao* Paul L. Dubin Department 1998; accepted 12 August 1998 Abstract: Hydrophobic interactions between proteins and amphiphilic of varying hydrophobicity. Although binding between proteins and copolymers increases with increas- ing alkyl

Dubin, Paul D.

199

Book review Photosynthesis: Regulation under Varying Light  

E-print Network

Book review Photosynthesis: Regulation under Varying Light Regimes, by V.S. Rama Das. Science of the research in the area of regulation of photosynthesis under varying light regimes. As stated in the Preface, he has provided a frame- work, rather than an exhaustive description, of the field. His goal

Govindjee "Gov"

200

RAPID ADAPTATION FOR MOBILE SPEECH APPLICATIONS Michiel Bacchiani  

E-print Network

that although the proposed utterance-based training algorithm leads to large data fragmentation, the resulting of the large statistics that this approach gives rise to when applied on a database of thousands of hours been shown to give significant er- ror rate reductions of automatic speech recognition for numerous

Cortes, Corinna

201

Rapid Prototyping: Lessons Learned  

Microsoft Academic Search

Rapid prototyping is a development method that may or may not be e ective in improving software products and process. Assessing the e ectiveness of rapid prototyping requires empirical data. We analyze 39 published and unpublished \\\\real world\\

V. Scott Gordon; James M. Bieman

1995-01-01

202

Estimation and tracking of rapidly time-varying broadband acoustic communication channels  

E-print Network

This thesis develops methods for estimating wideband shallow-water acoustic communication channels. The very shallow water wideband channel has three distinct features: large dimension caused by extensive delay spread; ...

Li, Weichang, 1972-

2006-01-01

203

Mobile-IT Education (MIT.EDU): M-Learning Applications for Classroom Settings  

ERIC Educational Resources Information Center

In this paper, we describe the Mobile-IT Education (MIT.EDU) system, which demonstrates the potential of using a distributed mobile device architecture for rapid prototyping of wireless mobile multi-user applications for use in classroom settings. MIT.EDU is a stable, accessible system that combines inexpensive, commodity hardware, a flexible…

Sung, M.; Gips, J.; Eagle, N.; Madan, A.; Caneel, R.; DeVaul, R.; Bonsen, J.; Pentland, A.

2005-01-01

204

The Design and Evaluation of a Computerized Adaptive Test on Mobile Devices  

ERIC Educational Resources Information Center

The use of computerized adaptive testing (CAT) has expanded rapidly over recent years mainly due to the advances in communication and information technology. Availability of advanced mobile technologies provides several benefits to e-learning by creating an additional channel of access with mobile devices such as PDAs and mobile phones. This paper…

Triantafillou, Evangelos; Georgiadou, Elissavet; Economides, Anastasios A.

2008-01-01

205

The Impact of the Mobile Web in Developing Countries Betty Purwandari  

E-print Network

, people start using their mobiles to access the World Wide Web, which is called mobile Web. Despite rapid to access the World Wide Web. Mobile Web application, such as Facebook, is modified to meet the need of living. Various case studies have been documented and analyzed by the World Wide Web Consortium (W3C

Southampton, University of

206

A lightweight reconfigurable security mechanism for 3G\\/4G mobile devices  

Microsoft Academic Search

Wireless communications are advancing rapidly. We are currently on the verge of a new revolutionary advancement in wireless data communications: the third generation of mobile telecommunications. 3G promises to converge mobile technology with Internet connectivity. Wireless data, multimedia applications, and integrated services will be among the major driving forces behind 3G. While wireless communications provide great flexibility and mobility, they

Jalal Al-Muhtadi; Dennis Mickunas; Roy Campbell

2002-01-01

207

Effects of Short-Term Memory and Content Representation Type on Mobile Language Learning  

ERIC Educational Resources Information Center

Due to the rapid advancements in mobile communication and wireless technologies, many researchers and educators have started to believe that these emerging technologies can be leveraged to support formal and informal learning opportunities. Mobile language learning can be effectively implemented by delivering learning content through mobile

Chen, Nian-Shing; Hsieh, Sheng-Wen; Kinshuk

2008-01-01

208

An Overview of Mobile Assisted Language Learning: From Content Delivery to Supported Collaboration and Interaction  

ERIC Educational Resources Information Center

Mobile learning is undergoing rapid evolution. While early generations of mobile learning tended to propose activities that were carefully crafted by educators and technologists, learners are increasingly motivated by their personal learning needs, including those arising from greater mobility and frequent travel. At the same time, it is often…

Kukulska-Hulme, Agnes; Shield, Lesley

2008-01-01

209

New Strategies for Stem Cell Mobilization  

PubMed Central

Mobilized peripheral blood (PB) is widely used as source of stem cells (PBSCs) for autologous stem cell transplantation (ASCT). The use of cytokines, alone or in combination with chemotherapy (chemomobilization), is the most common strategy applied to mobilize and collect PBSCs. However, a significant proportion of cancer patients fail to mobilize enough PBSCs to proceed to ASCT. Plerixafor is a small molecule that reversibly and transiently disrupts the interaction between the chemokine receptor CXCR4 and its ligand CXCL12 (formerly known as stroma derived factor 1, SDF-1) leading to the rapid release of CD34+ hematopoietic stem cells from the bone marrow (BM) to PB. Plerixafor has been recently approved to enhance PBSC mobilization in adult patients with multiple myeloma or non-Hodgkin lymphoma and has been shown to be more effective than G-CSF alone. There is limited experience on combining plerixafor with chemotherapy plus G-CSF in patients who mobilize poorly. Current evidence suggests that the addition of plerixafor is safe and effective in the large majority of the patients with low blood CD34+ cell count after mobilization and/or poor yield after the first collection(s). Circulating CD34+ cells can be increased by several folds with plerixafor and the majority of the patients considered “poor mobilizers” can be successfully collected. Overall, its mechanism of action inducing the rapid release of CD34+ cells from the BM to the circulation makes plerixafor suitable for the ‘preemptive’ use in patients who are hard-to-mobilize. PMID:23170195

Lemoli, Roberto M.

2012-01-01

210

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.

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

2014-01-01

211

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

212

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 y­operation of instructable mobile robots. Data con­ nections with varying and limited bandwidth such as the Internet, however of the predictive simulation technique to navi­ gation experiments with mobile robots. We present different

Burgard, Wolfram

213

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

214

Theoretical Mobility Analysis of Ion Mobility Spectrometry  

E-print Network

with each noble gas. A similar trend was exhibited in each gas. Figure 5. Reduced mobility vs. E. Results Trends in mobility were found based on the identity of the ion and drift gas and their respective+ 40Ar with the same reduced mass. The same trend was found for all ion/neutral combinations. Figure 2

Collins, Gary S.

215

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

216

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 ...

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

2005-11-18

217

System Identification: Time Varying and Nonlinear Methods  

E-print Network

Novel methods of system identification are developed in this dissertation. First set of methods are designed to realize time varying linear dynamical system models from input-output experimental data. The preliminary results obtained in a recent...

Majji, Manoranjan

2010-07-14

218

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

219

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

220

Mobility management for all-IP mobile networks: mobile IPv6 vs. proxy mobile IPv6  

Microsoft Academic Search

Recently, a network-based mobility management protocol called Proxy Mobile IPv6 (PMIPv6) is being actively standardized by the IETF NETLMM working group, and is starting to attract considerable attention among the telecommunication and Internet communities. Unlike the various existing protocols for IP mobility management such as Mobile IPv6 (MIPv6), which are host-based approaches, a network-based approach such as PMIPv6 has salient

Ki-Sik Kong; Wonjun Lee; Youn-Hee Han; Myung-Ki Shin; HeungRyeol You

2008-01-01

221

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

222

Summarisation for Mobile Databases  

Microsoft Academic Search

In mobile computing, issues such as limited resources, network capacities and organisational constraints may cause the complete replication of large databases on a mobile device to be infeasible. At the same time, some on-board storage of data is attractive as communication to the main database can be inconsistent. Thus, as the emphasis on application mobility increases, data summarisation offers a

Darin Chan; John F. Roddick

2005-01-01

223

Mobility and Young Children.  

ERIC Educational Resources Information Center

This newsletter theme issue deals with the phenomenon of mobility or transience in India, Kenya, Greece, Ireland, Malaysia, Thailand and Israel. The primary focus is on mobility's effect on young children, specifically their health and education; some of the broader concerns also addressed by the newsletter are the causes of mobility and its…

Bernard van Leer Foundation Newsletter, 1994

1994-01-01

224

Sound mobility models  

Microsoft Academic Search

Simulation has become an indispensable tool in the construction and evaluation of mobile systems. By using mobility models that describe constituent movement, one can explore large systems, producing repeatable results for comparison between alternatives. Unfortunately, the vast majority of mobility models---including all those in which nodal speed and distance or destination are chosen independently---suffer from decay; average speed decreases until

Jungkeun Yoon; Mingyan Liu; Brian Noble

2003-01-01

225

Smartphones Based Mobile Mapping Systems  

NASA Astrophysics Data System (ADS)

The past 20 years have witnessed an explosive growth in the demand for geo-spatial data. This demand has numerous sources and takes many forms; however, the net effect is an ever-increasing thirst for data that is more accurate, has higher density, is produced more rapidly, and is acquired less expensively. For mapping and Geographic Information Systems (GIS) projects, this has been achieved through the major development of Mobile Mapping Systems (MMS). MMS integrate various navigation and remote sensing technologies which allow mapping from moving platforms (e.g. cars, airplanes, boats, etc.) to obtain the 3D coordinates of the points of interest. Such systems obtain accuracies that are suitable for all but the most demanding mapping and engineering applications. However, this accuracy doesn't come cheaply. As a consequence of the platform and navigation and mapping technologies used, even an "inexpensive" system costs well over 200 000 USD. Today's mobile phones are getting ever more sophisticated. Phone makers are determined to reduce the gap between computers and mobile phones. Smartphones, in addition to becoming status symbols, are increasingly being equipped with extended Global Positioning System (GPS) capabilities, Micro Electro Mechanical System (MEMS) inertial sensors, extremely powerful computing power and very high resolution cameras. Using all of these components, smartphones have the potential to replace the traditional land MMS and portable GPS/GIS equipment. This paper introduces an innovative application of smartphones as a very low cost portable MMS for mapping and GIS applications.

Al-Hamad, A.; El-Sheimy, N.

2014-06-01

226

Mobile Technology, Crowdsourcing and Peace Mapping: New Theory and Applications for Conflict Management  

Microsoft Academic Search

\\u000a This chapter develops a conceptual framework to highlight how mobile technologies can play a role in preventing, resolving\\u000a and containing conflict. The rapid and worldwide proliferation of mobile phones means that access to mobile communication\\u000a is far higher than access to the Internet. We draw on The Third Side (3S) framework for conflict management to demonstrate\\u000a how mobile technology, crowdsourcing

Jessica Heinzelman; Rachel Brown; Patrick Meier

227

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

228

Analyzing and geo-visualizing individual human mobility patterns using mobile call records  

Microsoft Academic Search

Understanding the dynamics of the individuals' daily mobility patterns is very important in a wide range of fields. However, lacking of tools to monitor the time-resolved location of individuals makes this research consume both tremendous time and money in the past. Nowadays, the rapidly developing ability to collect space-time activity (STA) data through new information technologies such as cellular phones,

Chaogui Kang; Song Gao; Xing Lin; Yu Xiao; Yihong Yuan; Yu Liu; Xiujun Ma

2010-01-01

229

Youth, mobility and mobile phones in Africa: findings from a three-country study  

Microsoft Academic Search

The penetration of mobile phones into sub-Saharan Africa has occurred with amazing rapidity: for many young people, they now represent a very significant element of their daily life. This paper explores usage and perceived impacts among young people aged c. 9–18 years in three countries: Ghana, Malawi and South Africa. Our evidence comes from intensive qualitative research with young people,

Gina Porter; Kate Hampshire; Albert Abane; Alister Munthali; Elsbeth Robson; Augustine Tanle

2012-01-01

230

Mobile Virtual Private Networking  

NASA Astrophysics Data System (ADS)

Mobile Virtual Private Networking (VPN) solutions based on the Internet Security Protocol (IPSec), Transport Layer Security/Secure Socket Layer (SSL/TLS), Secure Shell (SSH), 3G/GPRS cellular networks, Mobile IP, and the presently experimental Host Identity Protocol (HIP) are described, compared and evaluated. Mobile VPN solutions based on HIP are recommended for future networking because of superior processing efficiency and network capacity demand features. Mobile VPN implementation issues associated with the IP protocol versions IPv4 and IPv6 are also evaluated. Mobile VPN implementation experiences are presented and discussed.

Pulkkis, Göran; Grahn, Kaj; Mårtens, Mathias; Mattsson, Jonny

231

ECG R-R peak detection on mobile phones.  

PubMed

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 paper, we are proposing the utilization of mobile phones for monitoring and analysis of biosignal. The computation performed inside the mobile phone's processor will now be exploited for healthcare delivery. We performed literature review on RR interval detection from ECG and selected few PC based algorithms. Then, three of those existing RR interval detection algorithms were programmed on Java platform. Performance monitoring and comparison studies were carried out on three different mobile devices to determine their application on a realtime telemonitoring scenario. PMID:18002800

Sufi, F; Fang, Q; Cosic, I

2007-01-01

232

Microwave fidelity studies by varying antenna coupling  

E-print Network

The fidelity decay in a microwave billiard is considered, where the coupling to an attached antenna is varied. The resulting quantity, coupling fidelity, is experimentally studied for three different terminators of the varied antenna: a hard wall reflection, an open wall reflection, and a 50 Ohm load, corresponding to a totally open channel. The model description in terms of an effective Hamiltonian with a complex coupling constant is given. Quantitative agreement is found with the theory obtained from a modified VWZ approach [Verbaarschot et al, Phys. Rep. 129, 367 (1985)].

B. Köber; U. Kuhl; H. -J. Stöckmann; T. Gorin; D. V. Savin; T. H. Seligman

2010-06-17

233

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

234

Rapid Prototype Group  

NASA Technical Reports Server (NTRS)

A worker from Marshall's Rapid Prototype Group inspects a prototype of the rocket based combined cycle engine (RBCC). Rapid prototyping group provides engineering models for many MSFC projects. The group takes computer designs from Marshall engineers and then make models based on these designs. They use many irnovative techniques to provide Marshall engineers with models of their designs.

1997-01-01

235

Boiling Radial Flow in Fractures of Varying  

E-print Network

SGP-TR-166 Boiling Radial Flow in Fractures of Varying Wall Porosity Robb Allan Barnitt June 2000 and boiling convective heat transfer, with boiling flow in a rock fracture. A series of experiments observed. The experimental study involved boiling radial flow in a simulated fracture, bounded by a variety of materials

Stanford University

236

Response of Raft Foundation on Varying Stratum  

Microsoft Academic Search

The effect on raft foundation of a barrage due to varying stratum has been examined using finite element analysis. The raft foundation is completely resting on soil media and surrounded by soil and rock media. Eight noded brick elements have been used for three-dimensional modeling and meshing of the rock, soil, cut-off, pier, beam and abutment but raft foundation has

Kumar Venkatesh; N. K. Samadhiya; A. D. Pandey

2009-01-01

237

Black rings with varying charge density  

Microsoft Academic Search

We find the general five-dimensional, supersymmetric black ring solutions in M-theory based upon a circular ring, but with arbitrary, fluctuating charge distributions around the ring. The solutions have three arbitrary charge distribution functions, but their asymptotic charges and angular momenta only depend upon the total charges on the ring. The arbitrary density fluctuations thus represent ``hair.'' By varying the charge

Iosif Bena; Chih-Wei Wang; Nicholas P. Warner

2006-01-01

238

The Varied Uses of Readability Measurement.  

ERIC Educational Resources Information Center

Readability formulas have varied uses. In education they are used to match children's reading ability to the difficulty level of material, select stories and books for classroom use and for individual students' particular needs, select textbooks and other reading materials, aid educational research, and check reading materials of newly literate…

Fry, Edward

239

Relaxation Assessment with Varied Structured Milieu (RELAX).  

ERIC Educational Resources Information Center

Describes Relaxation Assessment with Varied Structured Milieu (RELAX), a clinical program designed to assess the degree to which an individual is able to demonstrate self-control for overall general relaxation. The program is designed for use with the Cassel Biosensors biofeedback equipment. (JAC)

Cassel, Russell N.; Cassel, Susie L.

1983-01-01

240

Rapid Mobility of Mobile IP over WLAN Jun Tian and Abdelsalam (Sumi) Helal  

E-print Network

. A person can drive a car on high way at speed of #12;2 12km/h. High speed trains such as France TGV, Japanese bullet, German maglev can travel at speeds of over 320km/h. Could those people surf the internet

Helal, Abdelsalam

241

Static headspace-multicapillary column with gas chromatography coupled to ion mobility spectrometry as a simple approach for the discrimination of crude and processed traditional Chinese medicines.  

PubMed

The processing procedure can alter the nature and chemical transformation of traditional Chinese medicine to accommodate different clinical dispensing and preparation requirements. In this study, static headspace-multicapillary column with gas chromatography coupled to ion mobility spectrometry was developed for the rapid and sensitive discrimination of crude and processed traditional Chinese medicine. Using Radix Paeoniae Alba as a traditional Chinese medicine model, the combined power of this approach was illustrated by classifying the crude and processed Radix Paeoniae Alba samples into two main categories. The contents of the main components in Radix Paeoniae Alba varied significantly. The established method could promote the use of ion mobility spectrometry in intrinsic quality control and differentiation of herbal medicines from other processed products or preparations. PMID:25113615

Cao, Gang; Shou, Qiyang; Li, Qinglin; Jiang, Jianping; Chen, Xiaocheng

2014-11-01

242

Mobile health systems: a brief overview  

NASA Astrophysics Data System (ADS)

Rapid advances in information technology and telecommunications, and more specifically wireless and mobile communications, and their convergence (telematics) are leading to the emergence of a new type of information infrastructure that has the potential of supporting an array of advanced services for healthcare. The objective of this paper is to provide a snapshot of the applications of mobile technology in healthcare. A brief review of the spectrum of these applications and the potential benefits of these efforts will be presented, followed by success case studies in electronic patient record, emergency telemedicine, teleradiology, and home monitoring. It is anticipated that the progress carried out in these efforts, and the potential benefits of emerging mobile technologies will trigger the development of more applications, thus enabling the offering of a better service to the citizen.

Voskarides, S.; Pattichis, Constantinos S.; Habib Istepanian, Robert S.; Kyriacou, E.; Pattichis, Marios S.; Schizas, C. N.

2002-06-01

243

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

244

ACTS mobile SATCOM experiments  

NASA Technical Reports Server (NTRS)

Over the last decade, the demand for reliable mobile satellite communications (satcom) for voice, data, and video applications has increased dramatically. As consumer demand grows, the current spectrum allocation at L-band could become saturated. For this reason, NASA and the Jet Propulsion Laboratory are developing the Advanced Communications Technology Satellites (ACTS) mobile terminal (AMT) and are evaluating the feasibility of K/Ka-band (20/30 GHz) mobile satcom to meet these growing needs. U.S. industry and government, acting as co-partners, will evaluate K/Ka-band mobile satcom and develop new technologies by conducting a series of applications-oriented experiments. The ACTS and the AMT testbed will be used to conduct these mobile satcom experiments. The goals of the ACTS Mobile Experiments Program and the individual experiment configurations and objectives are further presented.

Abbe, Brian S.; Frye, Robert E.; Jedrey, Thomas C.

1993-01-01

245

Spectral Imaging from Uavs Under Varying Illumination Conditions  

NASA Astrophysics Data System (ADS)

Rapidly developing unmanned aerial vehicles (UAV) have provided the remote sensing community with a new rapidly deployable tool for small area monitoring. The progress of small payload UAVs has introduced greater demand for light weight aerial payloads. For applications requiring aerial images, a simple consumer camera provides acceptable data. For applications requiring more detailed spectral information about the surface, a new Fabry-Perot interferometer based spectral imaging technology has been developed. This new technology produces tens of successive images of the scene at different wavelength bands in very short time. These images can be assembled in spectral data cubes with stereoscopic overlaps. On field the weather conditions vary and the UAV operator often has to decide between flight in sub optimal conditions and no flight. Our objective was to investigate methods for quantitative radiometric processing of images taken under varying illumination conditions, thus expanding the range of weather conditions during which successful imaging flights can be made. A new method that is based on insitu measurement of irradiance either in UAV platform or in ground was developed. We tested the methods in a precision agriculture application using realistic data collected in difficult illumination conditions. Internal homogeneity of the original image data (average coefficient of variation in overlapping images) was 0.14-0.18. In the corrected data, the homogeneity was 0.10-0.12 with a correction based on broadband irradiance measured in UAV, 0.07-0.09 with a correction based on spectral irradiance measurement on ground, and 0.05-0.08 with a radiometric block adjustment based on image data. Our results were very promising, indicating that quantitative UAV based remote sensing could be operational in diverse conditions, which is prerequisite for many environmental remote sensing applications.

Hakala, T.; Honkavaara, E.; Saari, H.; Mäkynen, J.; Kaivosoja, J.; Pesonen, L.; Pölönen, I.

2013-08-01

246

Health and Mobility in the UK  

Microsoft Academic Search

Summary This report addresses mobility and travel in the UK and the consequential cost to the environment, economy, quality of life and health. In 2001, the UK had a rapidly increasing population of 59,030,600 people who need effective, efficient modes of travel. We focus on road traffic accidents as well as the health-related and environmental impacts of road and air

J. A. Newby; V. A. Mountford

247

Residential Mobility and Migration  

NSDL National Science Digital Library

In this module you will have the opportunity to explore the frequency of different types of residential moves carried out by Americans. You will examine some of the basic determinants of residential mobility by looking at variations in different types of mobility by age, marital status, education, and housing tenure. Finally, you will have an opportunity to test hypotheses, drawn from a popular theoretical perspective, about racial differences in residential mobility.

Crowder, Kyle

2009-02-16

248

Secure Mobile IP Communication  

E-print Network

of Mobile IP & IPSec - 2 - #12;Integration of Mobile IP & IPSec - 3 - Table of contents: 1 ABSTRACT 5 2 Threats 13 3.2.2 Security Issues In Mobile IP 14 3.3 Security models 14 4 IPSEC OVERVIEW 16 4.1 Where does IPSec fit in? 16 4.2 Securing the IP layer 16 4.3 Security services offered by IPSec 17 4.3.1 Spoofing

Braun, Torsten

249

Varying potential silicon carbide gas sensor  

NASA Technical Reports Server (NTRS)

A hydrocarbon gas detection device operates by dissociating or electro-chemically oxidizing hydrocarbons adsorbed to a silicon carbide detection layer. Dissociation or oxidation are driven by a varying potential applied to the detection layer. Different hydrocarbon species undergo reaction at different applied potentials so that the device is able to discriminate among various hydrocarbon species. The device can operate at temperatures between 100.degree. C. and at least 650.degree. C., allowing hydrocarbon detection in hot exhaust gases. The dissociation reaction is detected either as a change in a capacitor or, preferably, as a change of current flow through an FET which incorporates the silicon carbide detection layers. The silicon carbide detection layer can be augmented with a pad of catalytic material which provides a signal without an applied potential. Comparisons between the catalytically produced signal and the varying potential produced signal may further help identify the hydrocarbon present.

Shields, Virgil B. (Inventor); Ryan, Margaret A. (Inventor); Williams, Roger M. (Inventor)

1997-01-01

250

Time-varying system identification via maximum a posteriori estimation and its application to driver steering models  

Microsoft Academic Search

Modern automotive technologies try to predict the driver's intention in order to control the vehicle effectively. However mathematical models describing the driver's steering behavior with sufficient accuracy are not available. The difficulties arise from the time-varying properties of the driver's behavior under rapidly changing traffic conditions. In this paper, a time- varying system identification method using maximum a posteriori estimation

Tesheng Hsiao

2008-01-01

251

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

252

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

253

Synchronization in time-varying networks  

NASA Astrophysics Data System (ADS)

We study the stability of the synchronized state in time-varying complex networks using the concept of basin stability, which is a nonlocal and nonlinear measure of stability that can be easily applied to high-dimensional systems [P. J. Menck, J. Heitzig, N. Marwan, and J. Kurths, Nature Phys. 9, 89 (2013), 10.1038/nphys2516]. The time-varying character is included by stochastically rewiring each link with the average frequency f. We find that the time taken to reach synchronization is lowered and the stability range of the synchronized state increases considerably in dynamic networks. Further we uncover that small-world networks are much more sensitive to link changes than random ones, with the time-varying character of the network having a significant effect at much lower rewiring frequencies. At very high rewiring frequencies, random networks perform better than small-world networks and the synchronized state is stable over a much wider window of coupling strengths. Lastly we show that the stability range of the synchronized state may be quite different for small and large perturbations, and so the linear stability analysis and the basin stability criterion provide complementary indicators of stability.

Kohar, Vivek; Ji, Peng; Choudhary, Anshul; Sinha, Sudeshna; Kurths, Jüergen

2014-08-01

254

Modelling and simulation of spatially varying earthquake ground motions at sites with varying conditions  

Microsoft Academic Search

In a flat and uniform site, it is reasonable to assume that the spatially varying earthquake ground motions at various locations have the same power spectral density or response spectrum. If an engineering site with varying soil conditions at different structural supports is considered, this assumption is no longer valid because of different local site amplification effect. This paper presents

Kaiming Bi; Hong Hao

255

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

256

Amygdala responses to averted vs direct gaze fear vary as a function of presentation speed  

E-print Network

Amygdala responses to averted vs direct gaze fear vary as a function of presentation speed Reginald whether amygdala responses to rapidly presented fear expressions are preferentially tuned to averted vs tuned to direct vs averted gaze fear. We conducted three functional magnetic resonance imaging (f

Hadjikhani, Nouchine

257

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

258

Rapid shallow breathing  

MedlinePLUS

... rapid breathing has many possible medical causes, including: Asthma Blood clot in an artery in the lung Choking Chronic obstructive pulmonary COPD and other chronic lung diseases Heart failure Infection in the smallest air passages of the ...

259

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

260

Acute exposure to mobile phone and assessment of internal cerebral circulation in young healthy subjects: A Transcranial Doppler study  

E-print Network

1 Acute exposure to mobile phone and assessment of internal cerebral circulation in young healthy;2 INTRODUCTION The rapid worldwide increase in the use of mobile phones raises questions about the possible of mobile phone. The cerebral circulation may be potentially affected due to the exposure to RF emitted

Paris-Sud XI, Université de

261

Web-based Decision Support for Mobile Phone Selection Brian Whitworth, Chun Chieh Yang and Beatrix Jones  

E-print Network

Web-based Decision Support for Mobile Phone Selection Brian Whitworth, Chun Chieh Yang and Beatrix bwhitworth@acm.org Abstract The rapid evolution of the mobile phone has produced a proliferation of models and features, so selecting a mobile phone is now a complex multi-criteria problem. Customers may find online

Whitworth, Brian

262

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

263

Mobile phones in Africa: how much do we really know?  

Microsoft Academic Search

Mobile phones are a crucial mode of communication and welfare enhancement in poor countries, especially those lacking an infrastructure\\u000a of fixed lines. In recent years much has been written about how mobile telephony in Africa is rapidly reducing the digital\\u000a divide with developed countries. Yet, when one examines the evidence it is not at all clear what is really happening.

Jeffrey James; Mila Versteeg

2007-01-01

264

Challenges in the migration to 4G mobile systems  

Microsoft Academic Search

With the rapid development of wireless communication networks, it is expected that fourth-generation mobile systems will be launched within decades. 4G mobile systems focus on seamlessly integrating the existing wireless technologies including GSM, wireless LAN, and Bluetooth. This contrasts with 3G, which merely focuses on developing new standards and hardware. 4G systems supports comprehensive and personalized services, providing stable system

Suk Yu Hui; Kai Hau Yeung

2003-01-01

265

Mobile Networked Sensors for Environmental Observatories  

NASA Astrophysics Data System (ADS)

The development of the first embedded networked sensing (ENS) systems has been rapidly followed by their successful deployment for investigations in environments ranging from forest ecosystems, to rivers and lakes, and to subsurface soil observations. As ENS systems have been deployed, many technology challenges have been successfully addressed. For example, the requirements for local and remote data access and long operating life have been encountered and solved with a novel hierarchical network architecture and unique, low power platforms. This presentation will describe this progress and also the development and applications of a new ENS system addressing the most current challenges: A robotic ENS platform providing precise, reliable, and sustained observation capability with diverse sensing capabilities that may adapt to environmental dynamics. In the development of methods for autonomous observation by networked sensors, many applications have emerged requiring spatially and temporally intensive data sampling. Examples include the mapping of forest understory solar radiation, autonomous acquisition of imaging for plant phenology, and mapping of contaminant concentration in aquatic systems. Common to these applications is the need to actively and continuously configure the location and orientation of sensors for high fidelity mapping of the spatial distribution of phenomena. To address this primary environmental observation need, a new sensing platform, Networked Infomechanical Systems (NIMS) has been developed. NIMS relies on deployed aerial infrastructure (for example, cable suspension systems) in the natural environment to permit robotic devices to precisely and reliably move or remain stationary as required at elevations that may lie directly in or above the forest canopy or within a river or stream. NIMS systems are suspended to allow devices to translate a sensor node horizontally, and also to raise and lower devices. Examples of sensors that are now carried by NIMS include sensors for visible wavelength imaging, thermal infrared temperature mapping, microclimate, solar radiation, and for water quality and physical characterization of aquatic systems. NIMS devices include compact embedded computing, wireless network connectivity to surrounding static sensors, and remote Internet access. Exploiting this onboard computing allows NIMS devices to follow precise scanning protocols and self-calibration procedures. This presentation will describe permanent facility NIMS systems deployed at the James San Jacinto Mountains Reserve. Rapidly deployable NIMS permitting short term, highly mobile experiments will also be discussed. This includes the Thermal Mapper system that simultaneously samples plant physical structure (using laser position sensing and imaging) along with plant surface temperature (using high spatial resolution thermal infrared sensing). This compact system has been applied to the investigation of thermal characteristics of alpine plants in varying soil surfaces at the White Mountains Research Station. Other NIMS applications and results to be described include novel spatial mapping of nitrate concentration and other variables in flowing streams. Finally, this presentation will also address the many future applications of observatories linking investigators with remote mobile and static sensor networks. This research is supported by the NSF0331481 ITR program. Research has been performed in collaboration with R. Ambrose, K. Bible, D. Estrin, E. Graham, M. Hamilton, M. Hanson, T. Harmon, G. Pottie, P. Rundel, M. Srivastava, and G. Sukhatme

Kaiser, W. J.

2005-12-01

266

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

267

Ion mobility analysis of lipoproteins  

DOEpatents

A medical diagnostic method and instrumentation system for analyzing noncovalently bonded agglomerated biological particles is described. The method and system comprises: a method of preparation for the biological particles; an electrospray generator; an alpha particle radiation source; a differential mobility analyzer; a particle counter; and data acquisition and analysis means. The medical device is useful for the assessment of human diseases, such as cardiac disease risk and hyperlipidemia, by rapid quantitative analysis of lipoprotein fraction densities. Initially, purification procedures are described to reduce an initial blood sample to an analytical input to the instrument. The measured sizes from the analytical sample are correlated with densities, resulting in a spectrum of lipoprotein densities. The lipoprotein density distribution can then be used to characterize cardiac and other lipid-related health risks.

Benner, W. Henry (Danville, CA); Krauss, Ronald M. (Berkeley, CA); Blanche, Patricia J. (Berkeley, CA)

2007-08-21

268

Robust-control-based controller design for a mobile robot  

Microsoft Academic Search

The control of a mobile robot using a linear model with uncertainty for design purposes is investigated. The uncertainty arises\\u000a from the variation of the operation point of the mobile robot. Robust Control Theory is used for the controller design, which\\u000a allows dealing with systems whose parameters may vary between certain bounds. The proposed controller has shown, in experimentation\\u000a tests,

Gustavo J. E. Scaglia; Vicente A. Mut; Mario Jordan; Carlos Calvo; Lucia Quintero

2009-01-01

269

Quantitative Imaging with a Mobile Phone Microscope  

PubMed Central

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

270

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

271

Research on the key technologies of mobile digital maps  

NASA Astrophysics Data System (ADS)

Mobile and wireless technologies have evolved rapidly in recent years, especially the development of hardware devices, such as PDA and Smart phone. Different kinds of services and applications in these mobile devices, especially Mobile Geographic Information System and Location Based Service have been launched in recent years to help people to establish spatial relationship with the surroundings. Digital Map, which is a useful tool to assist a person for positioning and navigation, is usually included in these services. However, mobility of wireless devices, limited bandwidth of wireless networks, and limited storage capacity of mobile terminals seriously affect the performance of mobile digital maps and its application. In order to boom its application in mobile devices, this paper focuses on four important problems, i.e., data model optimization of mobile digital map, data organization and management at server side and client side respectively, data compression method, representation approaches on mobile terminals. In this paper, we adopt and modify the Europe transportation network standard GDF, accomplish effectively data compression with SVG, and present a new two-layer database structure to organize data. The digital maps can be expressed by multi-approaches, namely layers, districts and scales.

Ji, Cuiling; Xiao, Yongkang; Chi, Tianhe

2006-10-01

272

ACTS Mobile Terminals  

NASA Technical Reports Server (NTRS)

The development of the Advanced Communications Technology Satellite (ACTS) Mobile Terminal (AMT) and its follow-on, the Broadband Aeronautical Terminal (BAT), have provided an excellent testbed for the evaluation of K- and Ka-band mobile satellite communications systems. An overview of both of these terminals is presented in this paper.

Abbe, Brian S.; Agan, Martin J.; Jedrey, Thomas C.

1997-01-01

273

Mobile Sites Style Guide  

Cancer.gov

U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES National Instit?tes of Health National Cancer Instit?te NCI Mobile Sites St?le Guide Version 1.0 Table of Con?en?s 2 01. Mobile 01.1 Branding and Required Content 01.2 Branding: Backgrounds 01.3 Branding:

274

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

275

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

276

Mobile application pricing  

Microsoft Academic Search

â–º Mobile app markets have become established with contractual restrictions. â–º When mobile platforms are a durable good, equilibrium price is zero. â–º Platforms earn profits from a share of app revenues. â–º To improve profits, platforms act to constrain app pricing. â–º Mechanisms include most favored customer clauses.

Joshua S. Gans

2012-01-01

277

MOBILE AGENTS AND SECURITY  

Microsoft Academic Search

Mobile agent technology offers a new computing paradigm in which a software agent can suspend its execution on a host computer, transfer itself to another agent-enabled host on the network, and resume execution on the new host. The use of mobile code has a long history dating back to the use of remote job entry systems in the 1960's. Today's

W. A. Jansen

1999-01-01

278

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

279

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

280

"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

281

Mobile Bay Activity Book  

E-print Network

of the last major battles of the Civil War, was fought in August of 1864. · The Mobile Bay estuarine system visited in the early 1500's and named it Bay of the Holy Spirit. · The famous Battle of Mobile Bay, one;Can you help this Octopus find its cave? The common Atlantic octopus is found throughout the Gulf

282

Mobile teens in Taiwan  

Microsoft Academic Search

Abstract Research in Japan (Ito, 2005), Norway (Ling, 2004) and United Kingdom (Green 2001) has shown that parents use a mobile phone to remotely monitor children’s activities and teens who live at home use the mobile phone to gain their freedom from parental control. On the other hand, Chen and Katz (2009) find that American college students show more ,desire

Yi-Fan Chen

283

Mobile IPv6 Security  

Microsoft Academic Search

This paper presents a case study of security protocol design: authen- tication of binding updates in Mobile IPv6. We go step by step through the threat analysis and show how each threat is addressed in the protocol design. The goal is to solve any new security issues caused by the introduction of mobility without requiring any new security infrastructure.

Tuomas Aura

2002-01-01

284

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

285

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

286

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

287

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

288

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

289

Bus Centric Rapid Transit  

E-print Network

technology that tells upcoming traffic lights to delay turning red 5. Less stops Stations approximately 1 mile apart 6 Sample Station Design 7 Four RTS Corridor Budget Breakdown 8 Total Local** CMP*** FTA**** FTA Participation FTA Allocation... Comprehesive Mobility Plan for El Paso ** Local funding approved by City Council on Nov. 2010 **** FTA Grant application * Numbers in millions RTS Corridor TODs 9 TOD #1 TOD #2 TOD #3 TOD #4 TOD #5 Westside Transfer Center TOD #1 10 Westside...

Banasiak, J.

2011-01-01

290

Design of the next generation cognitive mobile ad hoc networks  

NASA Astrophysics Data System (ADS)

Cognition capability has been seen by researchers as the way forward for the design of next generation of Mobile Ad Hoc Networks (MANETs). The reason why a cognitive paradigm would be more suited to a MANET is because MANETs are highly dynamic networks. The topology may change very frequently during the operation of a MANET. Traffic patterns in MANETs can vary from time to time depending on the need of the users. The size of a MANET and node density is also very dynamic and may change without any predictable pattern. In a MANET environment, most of these parameters may change very rapidly and keeping track of them manually would be very difficult. Previous studies have shown that the performance of a certain routing approach in MANETs is dependent on the size of the network and node density. The choice of whether to use a reactive or proactive routing approach comes down to the network size parameter. Static or offline approaches to fine tune a MANET to achieve certain performance goals is hence not very productive as a lot of these parameters keep changing during the course of operation of MANETs. Similarly, the performance of MANETs would improve greatly if the MAC layer entity could operate in a more flexible manner. In this paper we propose a cognitive MANET design that will ensure that all these dynamic parameters are automatically monitored and decisions are based on the current status of these parameters.

Amjad, Ali; Wang, Huiqiang; Chen, Xiaoming

291

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..............................................................................................................1 1.1 THE DEFIANT DEMONSTRATION: MOBILE-PHONE­FACILITATED, ANTI-CHEMICAL-PLANT PROTESTS IN XIAMEN............................................................................................................................................ 1 1.2 THE PRECARIOUS MOBILE PHONE: THE NINE-YEAR EVOLUTION

Paris-Sud XI, Université de

292

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

293

Staphylococcus aureus mobile genetic elements.  

PubMed

Among the bacteria groups, most of them are known to be beneficial to human being whereas only a minority is being recognized as harmful. The pathogenicity of bacteria is due, in part, to their rapid adaptation in the presence of selective pressures exerted by the human host. In addition, through their genomes, bacteria are subject to mutations, various rearrangements or horizontal gene transfer among and/or within bacterial species. Bacteria's essential metabolic functions are generally encoding by the core genes. Apart of the core genes, there are several number of mobile genetic elements (MGE) acquired by horizontal gene transfer that might be beneficial under certain environmental conditions. These MGE namely bacteriophages, transposons, plasmids, and pathogenicity islands represent about 15% Staphylococcus aureus genomes. The acquisition of most of the MGE is made by horizontal genomic islands (GEI), recognized as discrete DNA segments between closely related strains, transfer. The GEI contributes to the wide spread of microorganisms with an important effect on their genome plasticity and evolution. The GEI are also involve in the antibiotics resistance and virulence genes dissemination. In this review, we summarize the mobile genetic elements of S. aureus. PMID:24728610

Alibayov, Babek; Baba-Moussa, Lamine; Sina, Haziz; Zde?ková, Kamila; Demnerová, Kate?ina

2014-08-01

294

Water mobility in the endosperm of high beta-glucan barley mutants as studied by nuclear magnetic resonance imaging.  

PubMed

(1)H NMR imaging (MRI) was used as a noninvasive technique to study water distribution and mobility in hydrated barley (Hordeum vulgare L.) seeds of accessions with varying content of beta glucan (BG), a highly hygroscopic cell wall component. High contents of BG in barley are unfavorable in malting where it leads to clotting of filters and hazing of beer as well as in animal feed where it hinders the rapid uptake of energy. However, a high content of BG has a positive nutritional effect, as it lowers the cholesterol and the glycaemic index. It was studied whether water distribution and mobility were related to content and location of BG. Water mobility was investigated by following the rate and mode of desiccation in hydrated single seeds. In order to determine the different water components, a multispin echo experiment was set up to reveal the T(2) transverse relaxation rates of water within the seeds. A principal component analysis (PCA) discriminated control seeds from the high-BG mutant seeds. MRI proved efficient in tracing the differences in water-holding capacity of contrasting barley seeds. All accessions showed nonuniform distribution of water at full hydration as well as during desiccation. The embryo retained water even after 36 h of drying, whereas the endosperm showed low and heterogeneous mobility of the water after drying. The relaxation time constants indicated that the BG mutants had regions of much higher water mobility around the ventral crease compared to the control. It is concluded that MRI can be applied to investigate temporal and spatial differences in the location of specific chemical compounds in single seeds. PMID:17371735

Fast Seefeldt, Helene; van den Berg, Frans; Köckenberger, Walter; Engelsen, Søren Balling; Wollenweber, Bernd

2007-04-01

295

MOBILE PHONE, A SUSTAINABLE PRODUCT?  

E-print Network

Community Education Work BUT #12;Mobile phone, a sustainable product ? Authors : Marianne Parry aMOBILE PHONE, A SUSTAINABLE PRODUCT? Marianne Parrya, b, Charlotte Sannierc, Laurent Hayem, Carole EXTRACTION AND PRODUCTION MANUFACTURING Component manufacturing Mobile phone assembly PACKAGING

van Tiggelen, Bart

296

Enhancing mobile browsing and reading  

E-print Network

Although the web browser has become a standard interface for information access on the Web, the mobile web browser on the smartphone does not hold the same interest to mobile users. A survey with 11 mobile users shows that ...

Yu, Chen-Hsiang

297

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

298

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

299

Stereoscopic depth perception varies with hues  

NASA Astrophysics Data System (ADS)

The contribution of color information to stereopsis is controversial, and whether the stereoscopic depth perception varies with chromaticity is ambiguous. This study examined the changes in depth perception caused by hue variations. Based on the fact that a greater disparity range indicates more efficient stereoscopic perception, the effect of hue variations on depth perception was evaluated through the disparity range with random-dot stereogram stimuli. The disparity range was obtained by constant-stimulus method for eight chromaticity points sampled from the CIE 1931 chromaticity diagram. Eight sample points include four main color hues: red, yellow, green, and blue at two levels of chroma. The results show that the disparity range for the yellow hue is greater than the red hue, the latter being greater than the blue hue and the disparity range for green hue is smallest. We conclude that the perceived depth is not the same for different hues for a given size of disparity. We suggest that the stereoscopic depth perception can vary with chromaticity.

Chen, Zaiqing; Shi, Junsheng; Tai, Yonghang; Yun, Lijun

2012-09-01

300

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

301

MULTIVARIATE VARYING COEFFICIENT MODEL FOR FUNCTIONAL RESPONSES  

PubMed Central

Motivated by recent work studying massive imaging data in the neuroimaging literature, we propose multivariate varying coefficient models (MVCM) for modeling the relation between multiple functional responses and a set of covariates. We develop several statistical inference procedures for MVCM and systematically study their theoretical properties. We first establish the weak convergence of the local linear estimate of coefficient functions, as well as its asymptotic bias and variance, and then we derive asymptotic bias and mean integrated squared error of smoothed individual functions and their uniform convergence rate. We establish the uniform convergence rate of the estimated covariance function of the individual functions and its associated eigenvalue and eigenfunctions. We propose a global test for linear hypotheses of varying coefficient functions, and derive its asymptotic distribution under the null hypothesis. We also propose a simultaneous confidence band for each individual effect curve. We conduct Monte Carlo simulation to examine the finite-sample performance of the proposed procedures. We apply MVCM to investigate the development of white matter diffusivities along the genu tract of the corpus callosum in a clinical study of neurodevelopment. PMID:12926711

Zhu, Hongtu; Li, Runze; Kong, Linglong

2012-01-01

302

MULTIVARIATE VARYING COEFFICIENT MODEL FOR FUNCTIONAL RESPONSES  

PubMed Central

Motivated by recent work studying massive imaging data in the neuroimaging literature, we propose multivariate varying coefficient models (MVCM) for modeling the relation between multiple functional responses and a set of covariates. We develop several statistical inference procedures for MVCM and systematically study their theoretical properties. We first establish the weak convergence of the local linear estimate of coefficient functions, as well as its asymptotic bias and variance, and then we derive asymptotic bias and mean integrated squared error of smoothed individual functions and their uniform convergence rate. We establish the uniform convergence rate of the estimated covariance function of the individual functions and its associated eigenvalue and eigenfunctions. We propose a global test for linear hypotheses of varying coefficient functions, and derive its asymptotic distribution under the null hypothesis. We also propose a simultaneous confidence band for each individual effect curve. We conduct Monte Carlo simulation to examine the finite-sample performance of the proposed procedures. We apply MVCM to investigate the development of white matter diffusivities along the genu tract of the corpus callosum in a clinical study of neurodevelopment. PMID:23645942

Zhu, Hongtu; Li, Runze; Kong, Linglong

2012-01-01

303

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

304

A conceptual model of public medical service system based-on cell phone mobile platform  

NASA Astrophysics Data System (ADS)

In recent years, cell phones have played an increasingly important role in rapidly-developing global telecommunication services. At present, mobile business develops very fast. However, the development in other mobile service fields, such as public service, mobile medical service, etc, is still in its infant stage. Drawing on the experience of the 'doctor workstation project' which is cooperated by Renmin University of China and Norway Fredskorps Corporation, this paper discusses the research and implementation of the Doctor Workstation System based on cell phone mobile platform. From the practice of the Doctor Workstation System, the paper advances a conceptual model of public medical service system based-on cell phone mobile platform.

Fu, Hongjiao; Zhao, Yue

305

Measurement of Domain Wall Mobility in Magneto-Optic Media  

NASA Astrophysics Data System (ADS)

Domain wall mobility in magneto-optic (MO) media is important in determining the thermomagnetic recording and erase process. However, measurement of domain wall mobility has been difficult due to the large coercivity of MO media near room temperature and the weak MO signal at high temperature. With an improved high speed polar Kerr MO camera system, the dynamics of domain wall motion can now be imaged and measured at temperatures near Tcurie. The domain wall mobility in GdTbFe samples was measured with the bubble collapse method. The experimental results show that the domain wall motion velocity is a linear function of applied bias field and the domain wall mobility is about 0.3 cm/sOe. Samples with different preparation methods are compared and the experiment shows that whereas the dynamic coercivity varies with the preparation method, the mobility is an intrinsic property and dependent primarily upon sample composition.

Du, Mann; Schultz, Mark D.; Kryder, Mark H.

1993-11-01

306

he application of rapid prototyping (RP) in fabricat-ing nonassembly robotic systems with inserts is pre-  

E-print Network

T he application of rapid prototyping (RP) in fabricat- ing nonassembly robotic systems is complete is quite attractive. Rapid prototyping can provide a means to do this. This process with some examples to illustrate the findings, specifically the rapidly prototyped mobile observation

Mavroidis, Constantinos

307

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

308

Rapidly Progressive Neurodegenerative Dementias  

PubMed Central

Background Neurodegenerative dementias are typically characterized by an insidious onset and a relatively slowly progressive course. Less common are patients with a rapidly progressive course to death. Objective To characterize patients with a neurodegenerative disease and a rapidly progressive course to death. Setting Tertiary Care Medical Center. Design/Methods Using a text word search for “rapid” and “dementia” in the same sentence, the Mayo Clinic Medical Records Linkage system was used to identify all patients evaluated between 1/1/00?9/30/07 with brain autopsy (N=96). Of these 96, we included only those with disease duration of <4 years to death and with histological diagnosis of a neurodegenerative disease. Results We identified 22 cases (10 males). Although 36% were Creutzfeldt-Jakob disease (CJD), the rest included frontotemporal lobar degenerative with motor neuron degeneration (FTLD-MND; 23%); a tauopathy (progressive supranuclear palsy or corticobasal degeneration; 18%); diffuse Lewy body disease (DLBD; 14%) or Alzheimer's disease 9%. All CJD cases died ?12 months after onset while the others had illness duration of >12 months. Notably, all three DLBD patients, but no others, initially experienced a transient postoperative- or illness-associated encephalopathy, then relative normality for two years, before a rapidly progressive dementia and decline to death in 4?12 months. Conclusions Based on this cohort, although CJD is the most likely cause of a rapidly progressive neurodegenerative dementia, FTLD-MND, DLBD, tauopathies and Alzheimer's disease can also cause a rapidly progressive dementia. If illness duration is beyond 12-months, a non-CJD neurodegenerative disease may be more likely the diagnosis, than CJD. PMID:19204156

Josephs, Keith A.; Ahlskog, J. Eric; Parisi, Joseph E.; Boeve, Bradley F.; Crum, Brian A.; Giannini, Caterina; Petersen, Ronald C.

2009-01-01

309

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

310

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

311

Rapid Cycling and Its Treatment  

MedlinePLUS

... may be rapid, ultra-rapid or ultradian cycling. Biological rhythm disturbances: This theory proposes that people with rapid cycling have daily biological rhythms that are out of sync with typical “ ...

312

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

Code of Federal Regulations, 2010 CFR

...Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Security Zone; Port of Mobile, Mobile Ship Channel, Mobile, AL. 165.835 Section 165.835 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...

2010-07-01

313

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

314

WKB approximation for abruptly varying potential wells  

NASA Astrophysics Data System (ADS)

We present an approach to obtain eigenfunctions and eigenenergies for abruptly varying potentials in the framework of the Wentzel-Kramers-Brillouin (WKB) approximation. To illustrate it, two examples of the potentials are studied. The first one is the combination of a step barrier and a harmonic oscillator potential, and the second one consists of a step barrier and a linear potential. The formulation of a WKB quantization rule is proposed. Our approach shows that WKB energies and those from numerical calculation are in good agreement. According to matching conditions used, WKB wavefunctions in this present work are violated at only one classical turning point, but they behave well at another point where the potentials are discontinuous.

Amthong, Attapon

2014-11-01

315

Percolation model with continuously varying exponents  

NASA Astrophysics Data System (ADS)

This work analyzes a percolation model on the diamond hierarchical lattice (DHL), where the percolation transition is retarded by the inclusion of a probability of erasing specific connected structures. It has been inspired by the recent interest on the existence of other universality classes of percolation models. The exact scale invariance and renormalization properties of DHL leads to recurrence maps, from which analytical expressions for the critical exponents and precise numerical results in the limit of very large lattices can be derived. The critical exponents ? and ? of the investigated model vary continuously as the erasing probability changes. An adequate choice of the erasing probability leads to the result ?=?, like in some phase transitions involving vortex formation. The percolation transition is continuous, with ?>0, but ? can be as small as desired. The modified percolation model turns out to be equivalent to the Q?1 limit of a Potts model with specific long range interactions on the same lattice.

Andrade, R. F. S.; Herrmann, H. J.

2013-10-01

316

Time varying arctic climate change amplification  

SciTech Connect

During the past 130 years the global mean surface air temperature has risen by about 0.75 K. Due to feedbacks -- including the snow/ice albedo feedback -- the warming in the Arctic is expected to proceed at a faster rate than the global average. Climate model simulations suggest that this Arctic amplification produces warming that is two to three times larger than the global mean. Understanding the Arctic amplification is essential for projections of future Arctic climate including sea ice extent and melting of the Greenland ice sheet. We use the temperature records from the Arctic stations to show that (a) the Arctic amplification is larger at latitudes above 700 N compared to those within 64-70oN belt, and that, surprisingly; (b) the ratio of the Arctic to global rate of temperature change is not constant but varies on the decadal timescale. This time dependence will affect future projections of climate changes in the Arctic.

Chylek, Petr [Los Alamos National Laboratory; Dubey, Manvendra K [Los Alamos National Laboratory; Lesins, Glen [DALLHOUSIE U; Wang, Muyin [NOAA/JISAO

2009-01-01

317

Climate dynamics: Why does climate vary?  

NASA Astrophysics Data System (ADS)

In recent years, climate change has become a major focus of public and political discussion. Ongoing scientific inquiry, revolving predominantly around understanding the anthropogenic effects of rising greenhouse gas levels, coupled with how successfully findings are communicated to the public, has made climate science both contentious and exigent. In the AGU monograph Climate Dynamics: Why Does Climate Vary?, editors De-Zheng Sun and Frank Bryan reinforce the importance of investigating the complex dynamics that underlie the natural variability of the climate system. Understanding this complexity—particularly how the natural variability of climate may enhance or mask anthropogenic warming—could have important consequences for the future. In this interview, Eos talks to De-Zheng Sun.

Schultz, Colin

2011-08-01

318

Fundamental Investigation of Circumferentially Varying Stator Cascades  

NASA Astrophysics Data System (ADS)

The fundamentals of circumferentially varying stator cascades and their interactions with a downstream fixed pitch propeller were investigated experimentally utilizing multiple measurement techniques. The flow physics associated with the isolated circumferentially varying, or cyclic, stator cascade was studied in a wind tunnel environment through string tuft flow visualization, 2-D PIV, Stereoscopic PIV, and static surface pressure measurements. The coupled wake physics of the cyclic stator cascade with propeller were then investigated in a water tunnel using Stereo PIV. Finally, the global performance of components and the coupled system were quantified through force and moment measurements on the model in the water tunnel. A cyclic distribution of the stators' deflections resulted in non-axisymmetric distributions of the surface pressure and the flow field downstream of the stator array. In the model near wake the flow field is associated with secondary flow patterns in the form of coherent streamwise vortical structures that can be described by potential flow mechanisms. The collective pitch distribution of the stators produces a flow field that resembles a potential Rankine vortex, whereas the cyclic pitch distribution generates a flow pattern that can be described by a potential vortex pair in a cross flow. The stator distribution alone produces a significant side force that increases linearly with stator pitch amplitude. When a propeller is incorporated downstream from the cyclic cascade the side force from the stator cascade is reduced, but a small vertical force and pitching moment are created. The generation of these secondary forces and moments can be related to the redistribution of the tangential flow from the cyclic cascade into the axial direction by the retreating and advancing blade states of the fixed pitch propeller.

Farnsworth, John A. N.

319

Bus Rapid Transit Impacts on Land Uses and Land Values in Seoul, Korea  

E-print Network

are turning to Bus Rapid Transit (BRT) as a way of cost- effectively expanding public transit services to help relieve traffic congestion, reduce carbon emissions, and increase mobility options for the poor. BecauseBus Rapid Transit Impacts on Land Uses and Land Values in Seoul, Korea Robert Cervero and Chang

California at Berkeley, University of

320

Fabrication of Non-Assembly Mechanisms and Robotic Systems Using Rapid Prototyping  

Microsoft Academic Search

In this paper, the application of Rapid Prototyping in fabricating non-assembly robotic systems and mechanisms is presented. Using two Rapid Prototyping techniques, Stere- olithography and Selective Laser Sintering, prototypes of mechanical mobile joints were fabricated. The designs of these component joints were then used to fabricate the articu- lated structure of experimental prototypes for two robotic systems: (1) a three-legged

ASME Student Mem; Jey Won; Munshi Alam

2001-01-01

321

Mobile Manufacturers Forum  

NSDL National Science Digital Library

This is the home page of the Mobile Manufacturer's Forum, an international association of several leading "radio communications equipment manufacturers." Its purpose is to inform the general public about health policies and standards regarding radio frequency (RF) energy emitted by mobile phones and base stations. There are several documents and press releases that can be accessed on the Web site. One in particular, called the Health Policy Update, outlines the research findings of government agencies and independent organizations. These include recommendations for safe design and use, and assessments of health risks associated with cellular phones and other RF devices. An overview of mobile phone technology is also presented.

1998-01-01

322

Rapid metal tooling  

Microsoft Academic Search

The materials which can currently be processed using commercially available rapid prototyping techniques have limited mechanical characteristics. Describes research into two processes which offer metal part capabilities, namely selective laser sintering and laser generating. Pays particular attention to the selection of suitable materials. Discusses the application of these techniques to the manufacture of metal tools.

F. Klocke; T. Celiker; Y.-A. Song

1995-01-01

323

Advanced rapidity gap trigger  

E-print Network

Nubmer of phisically interesting processes is charachterized by the rapidity gaps. In reality, this gaps is filled by uderlying events with high (more than 0.75 for higgs) probability. In this paper we purpose a way to detect this shadowed events with aim to raise the number of rare events.

Abramovsky, V A

2004-01-01

324

Navigate the Digital Rapids  

ERIC Educational Resources Information Center

How can teachers teach digital citizenship when the digital landscape is changing so rapidly? How can teachers teach proper online social interactions when the students are outside their classroom and thus outside their control? Will encouraging students to engage in global collaborative environments land teachers in hot water? These are the…

Lindsay, Julie; Davis, Vicki

2010-01-01

325

Rapid Detection of Pathogens  

Microsoft Academic Search

Pathogen identification is a crucial first defense against bioterrorism. A major emphasis of our national biodefense strategy is to establish fast, accurate and sensitive assays for diagnosis of infectious diseases agents. Such assays will ensure early and appropriate treatment of infected patients. Rapid diagnostics can also support infection control measures, which monitor and limit the spread of infectious diseases agents.

David Perlin

2005-01-01

326

How rapidly advancing nations  

E-print Network

How rapidly advancing nations can prosper in the Information Age IBM Global Business Services IBM Institute for Business Value Government Leveraging information and communications technologies for national;1 All nations in developing and advanced economies have become such extensive users of information

327

Histogramic in-motion mapping for mobile robot obstacle avoidance  

Microsoft Academic Search

Histogramic in-motion mapping (HIMM) is introduced as a new method for real-time map building with a mobile robot motion. HIMM represents data in a two-dimensional array, called a histogram grid, that is updated through rapid in-motion sampling of on-board range sensors. Rapid in-motion sampling results in a map representation that is well-suited to modeling inaccurate and noisy range-sensor data, such

Johann Borenstein; Yoram Koren

1991-01-01

328

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

329

Development of legged, wheeled, and hybrid rover mobility models to facilitate planetary surface exploration mission analysis  

E-print Network

This work discusses the Mars Surface Exploration (MSE) tool and its adaptation to model rovers featuring legged, wheeled, and hybrid mobility. MSE is a MATLAB based systems engineering tool that is capable of rapidly ...

McCloskey, Scott H. (Scott Haddon)

2007-01-01

330

Kinematic Equation Based Vehicle Queue Location Estimation Method for Signalized Intersections Using Mobile Sensor Data  

E-print Network

proliferation of Global Position Systems (GPS) equipped vehicles and devices have led to the emergence and rapid' privacy is compromised. Mobile sensor data have been mainly used for performance evaluation and state

Ban, Xuegang "Jeff"

331

Distributed Mobility Management for Target Tracking in Mobile Sensor Networks  

Microsoft Academic Search

Mobility management is a major challenge in mobile ad hoc networks (MANETs) due in part to the dynamically changing network topologies. For mobile sensor networks that are deployed for surveillance applications, it is important to use a mobility management scheme that can empower nodes to make better decisions regarding their positions such that strategic tasks such as target tracking can

Yi Zou; Krishnendu Chakrabarty

2007-01-01

332

Mobile Electronic Identity: Securing Payment on Mobile Phones  

E-print Network

Mobile Electronic Identity: Securing Payment on Mobile Phones Chen Bangdao, A.W.Roscoe Oxford.Roscoe}@comlab.ox.ac.uk Abstract. The pervasive use of mobile phones has created a dynamic computing platform that a large percentage of the population carries routinely. There is a growing trend of integrating mobile phones

Oxford, University of

333

A New Realistic Mobility Model for Mobile Ad Hoc Networks  

Microsoft Academic Search

Accurately simulating user movements in mobile ad hoc networks (MANETs) is very important to the prediction of actual network and user performance. Therefore, using a realistic mobility model is a crucial factor in enhancing the confidence in the simulation results of these networks. In this paper, we present a new mobility model for MANETs, called realistic mobility model (RMM). In

Ahmed E. Kamal; Jamal N. Al-karaki

2007-01-01

334

Contention Aware Mobility Prediction Routing for Intermittently Connected Mobile Networks  

E-print Network

Contention Aware Mobility Prediction Routing for Intermittently Connected Mobile Networks Ahmed to explore the possibility of taking mobile nodes as message carriers for end-to-end delivery of the messages and nodal buffer availability. In particular, PF is based on the observations that the node mobility

Shihada, Basem

335

Processing Distributed Mobile Queries with Interleaved Remote Mobile Joins  

Microsoft Academic Search

The query processing in a mobile computing environment involves join processing among different sites which include static servers and mobile computers. Because of the presence of asymmetric features in a mobile computing environment, the conventional query processing for a distributed database cannot be directly applied to a mobile computing system. In this paper, we first explore some unique features of

Chang-hung Lee; Ming-syan Chen

2002-01-01

336

Mobile manipulation using tracks of a tracked mobile robot  

Microsoft Academic Search

This paper presents the investigation on mobile manipulation of a self-reconfigurable tracked mobile robot, using its tracks for both manipulation and locomotion. It is desirable for a mobile robot to possess manipulation capability in unstructured environments, especially in the scenario which is unsuitable for human beings. However, it is not convenient for such a mobile robot to carry an onboard

Yugang Liu; Guangjun Liu

2009-01-01

337

MEMS: Detection and Tracking of Mobile Eevents Using Mobile Sensors  

E-print Network

MEMS: Detection and Tracking of Mobile Eevents Using Mobile Sensors Na Yu and Qi Han Department such as air pollutant diffusion, toxic gas leakage, or wildfire spreading using mobile sensors such as robots. Lots of existing work use control theory to plan the path of mobile sensors by assuming that the event

Han, Qi "Chee"

338

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. Mobile Initiatives on Other Campuses E. Mobile Learning Bibliography #12;Page | 2 Synopsis In order learning technologies for teaching and learning, it is first important to understand the current context

Barrash, Warren

339

Limits of social mobilization  

E-print Network

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 ...

Pentland, Alex Paul

340

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

341

Mobile applications for dermatology.  

PubMed

The number of available mobile applications has increased by 500% over the past 3 years. Searching for useful dermatology applications may be overwhelming. The following summary may help both advanced and budding dermatologists select useful programs. PMID:22929355

Deveau, Michael; Chilukuri, Suneel

2012-09-01

342

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.

343

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

344

Economic Mobility Project  

NSDL National Science Digital Library

Working with partners from The American Enterprise Institute and The Urban Institute, the Economic Mobility Project is an initiative of The Pew Charitable Trusts. The aim of the Project is to focus public attention on economic mobility through well-thought out scholarly analyses, reports, public events, and discussion. In the "Reports & Research" section, visitors can download papers like "Neighborhoods and the Black-White Mobility Gap" and "Ups and Downs: Does the American Economy Still Promote Upward Mobility?" Visitors can also look over a topical list of their papers as well. Moving on, the "Newsroom" area provides access to the Project's latest press releases and information about their upcoming events. The site is rounded out by a search engine and an area where visitors can sign up to receive the latest news from the Project.

345

Understanding Mobile Apps  

MedlinePLUS

... online. The combined information allows the mobile ad network to send you targeted ads – ads that may be relevant to someone with your preferences and in your location. Malware and Security Concerns Should I update my apps? Your phone ...

346

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

347

Assessment of renewable energy technology and a case of sustainable energy in mobile telecommunication sector.  

PubMed

The rapid growth of the mobile telecommunication sectors of many emerging countries creates a number of problems such as network congestion and poor service delivery for network operators. This results primarily from the lack of a reliable and cost-effective power solution within such regions. This study presents a comprehensive review of the underlying principles of the renewable energy technology (RET) with the objective of ensuring a reliable and cost-effective energy solution for a sustainable development in the emerging world. The grid-connected hybrid renewable energy system incorporating a power conversion and battery storage unit has been proposed based on the availability, dynamism, and technoeconomic viability of energy resources within the region. The proposed system's performance validation applied a simulation model developed in MATLAB, using a practical load data for different locations with varying climatic conditions in Nigeria. Results indicate that, apart from being environmentally friendly, the increase in the overall energy throughput of about 4 kWh/$ of the proposed system would not only improve the quality of mobile services, by making the operations of GSM base stations more reliable and cost effective, but also better the living standards of the host communities. PMID:24578673

Okundamiya, Michael S; Emagbetere, Joy O; Ogujor, Emmanuel A

2014-01-01

348

Assessment of Renewable Energy Technology and a Case of Sustainable Energy in Mobile Telecommunication Sector  

PubMed Central

The rapid growth of the mobile telecommunication sectors of many emerging countries creates a number of problems such as network congestion and poor service delivery for network operators. This results primarily from the lack of a reliable and cost-effective power solution within such regions. This study presents a comprehensive review of the underlying principles of the renewable energy technology (RET) with the objective of ensuring a reliable and cost-effective energy solution for a sustainable development in the emerging world. The grid-connected hybrid renewable energy system incorporating a power conversion and battery storage unit has been proposed based on the availability, dynamism, and technoeconomic viability of energy resources within the region. The proposed system's performance validation applied a simulation model developed in MATLAB, using a practical load data for different locations with varying climatic conditions in Nigeria. Results indicate that, apart from being environmentally friendly, the increase in the overall energy throughput of about 4?kWh/$ of the proposed system would not only improve the quality of mobile services, by making the operations of GSM base stations more reliable and cost effective, but also better the living standards of the host communities. PMID:24578673

Okundamiya, Michael S.; Emagbetere, Joy O.; Ogujor, Emmanuel A.

2014-01-01

349

Mobile-IT Education (MIT. EDU): m-learning applications for classroom settings  

Microsoft Academic Search

In this paper, we describe the Mobile-IT Education (MIT.EDU) system, which demonstrates the potential of using a distributed mobile device architecture for rapid prototyping of wireless mobile multi-user applications for use in classroom settings. MIT.EDU is a stable, accessible system that combines inexpensive, commodity hardware, a flexible sensor\\/ peripheral interconnection bus, and a powerful, light-weight distributed sensing, classifica- tion, and

M. Sung; Jonathan Gips; Nathan Eagle; Anmol Madan; Ron Caneel; Richard W. DeVaul; J. Bonsen; Alex Pentland

2005-01-01

350

A conceptual model of public medical service system based-on cell phone mobile platform  

Microsoft Academic Search

\\u000a In recent years, cell phones have played an increasingly important role in rapidly-developing global telecommunication services.\\u000a At present, mobile business develops very fast. However, the development in other mobile service fields, such as public service,\\u000a mobile medical service, etc, is still in its infant stage. Drawing on the experience of the ‘doctor workstation project’ which\\u000a is cooperated by Renmin University

Hongjiao Fu; Yue Zhao

2007-01-01

351

A Mobile Tele-Radiology Imaging System with JPEG2000 for an Emergency Care  

Microsoft Academic Search

The aim of this study was to design a tele-radiology imaging system for rapid emergency care via mobile networks and to assess\\u000a the diagnostic feasibility of the Joint Photographic Experts Group 2000 (JPEG2000) radiological imaging using portable devices.\\u000a Rapid patient information and image exchange is helpful to make clinical decisions. We assessed the usefulness of the mobile\\u000a tele-radiology system by

Dong Keun Kim; Eung Y. Kim; Kun H. Yang; Chung Ki Lee; Sun K. Yoo

352

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

353

Mobile Technologies and Education  

Microsoft Academic Search

\\u000a The objective of this study was to explore new and mobile collaboration technologies and to try to find more effective ways\\u000a for museum visits with mobile technologies. The study was implemented in December 2002 with 20 Finnish high school students.\\u000a The students were participating in alternative art course. All of the students seemed to learn quite easily the technologies\\u000a and

Heikki Haaparanta; Harri Ketamo

2003-01-01

354

TIMED Spacecraft Mobile  

NSDL National Science Digital Library

This is a mobile for learners to assemble, aimed at enhancing their knowledge of NASA spacecraft and scientific facts. Each hanging element of the mobile contains an image and one fact or scientific concept related to the TIMED (Thermosphere, Ionosphere, Mesosphere, Energetics, and Dynamics) spacecraft mission. The cover contains background information about NASA's TIMED mission and two language arts exercises to reinforce space science vocabulary.

355

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

356

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

357

Spring 2012 Distance Learning Class COT 6930 Android Mobile Component Development  

E-print Network

Spring 2012 ­ Distance Learning Class COT 6930 ­ Android Mobile Component Development Course Syllabus: Software tool and library development for the Android mobile platform using Java and XML, to facilitate rapid development of optimized Android applications. Text: Murphy, Mark L., The Busy Coder's Guide

Fernandez, Eduardo

358

Estimation of chemical mobility in soil from liquid chromatographic retention times  

Microsoft Academic Search

Conclusion Mobility of a chemical through soil is a primary factor in assessment of its environmental fate. It is useful in the preliminary evaluation of new or existing chemicals to have a rapid and simple means to estimate mobility potential. HPLC can provide this type of tool for estimation of soil adsorption coefficient and therefore the tendency of a chemical

P. J. McCall; R. L. Swann; D. A. Laskowski; S. M. Unger; S. A. Vrona; H. J. Dishburger

1980-01-01

359

Improving the Effectiveness of Mobile Application Design: User-Pairs Testing by Non-professionals  

Microsoft Academic Search

The nature of mobile applications requires a fast and inexpensive design process. The development phase is short because the life cycle of an application is limited, mobile technology is developing rapidly, and the competition is heavy. Existing design methods are time-consuming and require expertise (e.g. Contextual Design). We suggest a design approach where focus groups are followed by usability tests

Titti Kallio; Aki Kekäläinen

2004-01-01

360

uLearn: Facilitating Ubiquitous Learning through Camera Equipped Mobile Phones  

Microsoft Academic Search

This paper describes a prototype application based on smartphone devices which supports independent learners within a mobile environment. The techniques employed allow children to rapidly gain access to a large repository of multimedia information through the use of a camera equipped mobile phone or smartphone. More specifically, the use of visual codes (Rohs M. et al., 2004) attached to locations

Keith Mitchell; Nicholas J. P. Race

2005-01-01

361

Mobile phone location determination and its impact on intelligent transportation systems  

Microsoft Academic Search

Research and development on the technologies of locating the mobile (wireless) phone caller have been rapidly gaining momentum around the world. Once these technologies are mature enough to be deployed, they will have significant impact on automotive telematics and modern public transit systems. In this paper, we will discuss why locating mobile phones becomes a hot topic among telecommunications giants,

Yilin Zhao

2000-01-01

362

Risk and Benefit Perceptions of Mobile Phone and Base Station Technology in Bangladesh  

Microsoft Academic Search

Research in developed countries showed that many citizens perceive that radio signals transmitted by mobile phones and base stations represent potential health risks. Less research has been conducted in developing countries focused on citizen perceptions of risks and benefits, despite the recent and rapid introduction of mobile communication technologies. This study aims to identify factors that are influential in determining

Kleef van E; A. R. H. Fischer; M. Khan; L. J. Frewer

2010-01-01

363

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

364

A Context-Aware Vertical Handover Decision Algorithm for Multimode Mobile Terminals and Its Performance  

Microsoft Academic Search

Traditional handover decision algorithms for mobile devices mainly depend on signal strength. In the very near future, these will be obsolete for wireless networks and mobile terminals that are rapidly evolving towards being heterogeneous and multimodal, respectively, in response to the huge market potential. In the given circumstances, more sophisticated and intelligent handover decision algorithm is needed so that terminals

Tansir Ahmed; Kyandoghere Kyamakya; Markus Ludwig

365

Mobile Practices in Everyday Life: Popular Digital Technologies and Schooling Revisited  

ERIC Educational Resources Information Center

Mobile phones have rapidly been absorbed into the fabric of our day-to-day lives. They are now a key consumer item, a symbol of social capital and they connect their users to a mobile web with multiple applications. As ownership and access to smartphones has spread into the teenage years, their place in institutions of formal education has been…

Merchant, Guy

2012-01-01

366

System?s Design and Implementation for Easy Creation of Mobile Commerce Systems  

Microsoft Academic Search

Mobile commerce (m-commerce) is a rather new field in the business world. It depends on wireless networks for accessing the Internet from mobile devices and for exchanging data between such devices. Wireless technologies on the one hand evolve rapidly and are met in many different applications. On the other hand a plethora of factors encourage market to make advances towards

John D. Garofalakis; Flora Oikonomou; Vasilios Stefanis

2008-01-01

367

Exploring College Students' Attitudes and Self-Efficacy of Mobile Learning  

ERIC Educational Resources Information Center

Previous studies have indicated that computers and the internet play very important roles in students' acceptance and use of new information technology. In recent years, with the rapid development of mobile technology, mobile learning (m-learning) has becoming another popular topic. However, little is known about the students' attitudes and…

Yang, Shih-hsien

2012-01-01

368

Designing an agile methodology for mobile software development: A hybrid method engineering approach  

Microsoft Academic Search

New Advances in mobile computer technology and the rapid growth of wireless networks in quality and quantity has introduced new applications and concerns in computer science and industry. The unique requirements and constraints associated with mobile systems have brought new challenges to software development for such environments, as it demands extensive improvements to traditional systems development methodologies in order to

Vahid Rahimian; Raman Ramsin

2008-01-01

369

Poster: the development of a semantic feature analysis based mobile application for individuals with aphasia  

Microsoft Academic Search

We present a Semantic Feature Analysis based mobile application and paired web application, which have been developed in order to facilitate speech and language therapy with a Person with Aphasia (PWA). The goal of this research is to streamline current speech and language therapy practices, by enabling rapid data entry, aggregation and remote analysis. The mobile application has been developed

Conor Higgins; Áine Kearns; Sue Franklin

2012-01-01

370

Offline web application and quiz synchronization for e-learning activity for mobile browser  

Microsoft Academic Search

Rapid growing of internet applications and users has led the improvement of mobile web browser technology and standards such as HTML5. Recently, HTML5 is turning to be a de facto standard after some of its features has been implemented in major mobile web browsers. Moodle as a web based Learning Management System (LMS) has been popular in academic environment for

Royyana M. Ijtihadie; Yoshifumi Chisaki; Tsuyoshi Usagawa; H. B. Cahyo; Achmad Affandi

2010-01-01

371

A Study on Jabber-based Instant Messaging System for Mobile Networks  

Microsoft Academic Search

With the rapid advancement of wireless network technologies, Mobile Instant Messaging (IM) has become a major application in the telecommunications industry. Firstly, this paper introduces recent research and development efforts in constructing mobile IM systems. Secondly, it advances a new service model and implementation mechanism based on Jabber\\/XMPP. The communication protocol of our system provides an open, expandable, real-time communication

Yunxiang Gao; Chuangbai Xiao; Chaoqin Gao; Huiguang Chen

2008-01-01

372

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

373

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

374

A predictive bandwidth reservation scheme using mobile positioning and road topology information  

Microsoft Academic Search

In cellular networks, an important practical issue is how to limit the handoff dropping probability efficiently. One possible approach is to perform dynamic bandwidth reservation based on mobility predictions. With the rapid advances in mobile positioning technology, and the widespread availability of digital road maps previously designed for navigational devices, we propose a predictive bandwidth reservation scheme built upon these

Wee-seng Soh; Hyong S. Kim

2006-01-01

375

Stability of mass varying particle lumps  

SciTech Connect

The theoretical description of compact structures that share some features with mass varying particles allows for a simple analysis of the equilibrium and stability for massive stellar bodies. We investigate static, spherically symmetric solutions of Einstein equations for a system composed by nonbaryonic matter (neutrinos or dark matter) which forms stable structures through attractive forces mediated by a background scalar field (dark energy). Assuming that the dark matter, or massive neutrinos, consists of a gas of weakly interacting particles, the coupling with the scalar field is translated into an effective dependence of the mass of the compounding particle on the radial coordinate of the curved spacetime. The stability analysis reveals that these static solutions become dynamically unstable for different Buchdahl limits of the ratio between the total mass energy and the stellar radius, M/R. We also find regular solutions that for an external observer resemble Schwarzschild black holes. Our analysis leaves unanswered the question whether such solutions, which are both regular and stable, do exist.

Bernardini, A. E.; Bertolami, O. [Departamento de Fisica, Universidade Federal de Sao Carlos, P.O. Box 676, 13565-905, Sao Carlos, SP (Brazil); Instituto Superior Tecnico, Departamento de Fisica, Av. Rovisco Pais, 1, 1049-001, Lisboa (Portugal)

2009-12-15

376

Stratospheric Impact of Varying Sea Surface Temperatures  

NASA Technical Reports Server (NTRS)

The Finite-Volume General Circulation Model (FVGCM) has been run in 50 year simulations with the: 1) 1949-1999 Hadley Centre sea surface temperatures (SST), and 2) a fixed annual cycle of SSTs. In this presentation we first show that the 1949-1999 FVGCM simulation produces a very credible stratosphere in comparison to an NCEP/NCAR reanalysis climatology. In particular, the northern hemisphere has numerous major and minor stratospheric warming, while the southern hemisphere has only a few over the 50-year simulation. During the northern hemisphere winter, temperatures are both warmer in the lower stratosphere and the polar vortex is weaker than is found in the mid-winter southern hemisphere. Mean temperature differences in the lower stratosphere are shown to be small (less than 2 K), and planetary wave forcing is found to be very consistent with the climatology. We then will show the differences between our varying SST simulation and the fixed SST simulation in both the dynamics and in two parameterized trace gases (ozone and methane). In general, differences are found to be small, with subtle changes in planetary wave forcing that lead to reduced temperatures in the SH and increased temperatures in the NH.

Newman, Paul A.; Nash, Eric R.; Nielsen, Jon E.; Waugh, Darryn; Pawson, Steven

2004-01-01

377

Libraries and the Mobile Web  

ERIC Educational Resources Information Center

In 2011, cell phones and mobile devices are ubiquitous. The vast majority of Americans now own cell phones, and over half of them have mobile access to the Internet through a phone or other mobile device. For libraries to stay relevant, they must be able to offer content and services through the mobile web. In this issue of "Library Technology…

Hanson, Cody

2011-01-01

378

Using Mobile Phones in Education  

Microsoft Academic Search

We present three projects in mobile learning. First, we polled 333 Japanese university students regarding their use of mobile devices. 100% reported owning a mobile phone. 99% send email on their mobile phones, exchanging some 200 email messages each week. 66% email peers about classes; 44% email for studying. In contrast, only 43% email on PCs, exchanging an average of

Patricia Thornton; Chris Houser

2004-01-01

379

Planned Disconnections for Mobile Databases  

Microsoft Academic Search

As mobility permeates todays computing environment, we envision application infrastructures that will increas- ingly use mobile technologies. Traditional database appli- cations will need to integrate mobile entities: people and computers. In this paper, we develop a distributed database framework for mobile environments. A key requirement in such an environment is to support frequent connection and disconnection of database sites.

Joanne Holliday; Divyakant Agrawal; Amr El Abbadi

2000-01-01

380

An Architecture for Mobile Databases  

Microsoft Academic Search

The use of mobile computers is gaining popularity. The number of users with laptops and notebooksis increasing and this trend is likely to continue in the future where the number of mobile clients willfar exceed the number of traditional fixed clients. Applications running on mobile clients downloadinformation by periodically connecting to repositories of data. Mobile clients constitute a new anddifferent

B. r. Badrinath; Shirish Hemant Phatak

1998-01-01

381

Disconnection Modes for Mobile Databases  

Microsoft Academic Search

As mobility permeates into todays computing and communication arena, we envision application infrastructures that will in- creasingly rely on mobile technologies. Traditional database applications and information service applications will need to integrate mobile entities: people and computers. In this paper, we develop a distributed database framework for mobile environments. A key requirement in such an environment is to support frequent

Joanne Holliday; Divyakant Agrawal; Amr El Abbadi

2002-01-01

382

Locating Objects in Mobile Computing  

Microsoft Academic Search

Abstract In current distributed systems, the notion of mobility is emerging in many forms and appli - cations Mobility arises naturally in wireless computing, since the location of users changes as they move Besides mobility in wireless computing, software mobile agents are another popular form of moving objects Locating objects, i e , identifying their current location, is central to

Evaggelia Pitoura; George Samaras

2001-01-01

383

Mobile video stream monitoring system  

Microsoft Academic Search

IMVS (Intelligent Mobile Video Stream Monitoring System) is a mobile video surveillance system. The objective of IMVS is to design a high performance video stream monitoring system in a mobile computing environment. In particular, the technical questions to be addressed are: (1) how to minimize the amount of video signals to be transmitted between the front-end mobile device and the

Kam-Yiu Lam; Calvin K. H. Chiu

2003-01-01

384

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

385

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

386

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

387

Rapid Detection of Pathogens  

SciTech Connect

Pathogen identification is a crucial first defense against bioterrorism. A major emphasis of our national biodefense strategy is to establish fast, accurate and sensitive assays for diagnosis of infectious diseases agents. Such assays will ensure early and appropriate treatment of infected patients. Rapid diagnostics can also support infection control measures, which monitor and limit the spread of infectious diseases agents. Many select agents are highly transmissible in the early stages of disease, and it is critical to identify infected patients and limit the risk to the remainder of the population and to stem potential panic in the general population. Nucleic acid-based molecular approaches for identification overcome many of the deficiencies associated with conventional culture methods by exploiting both large- and small-scale genomic differences between organisms. PCR-based amplification of highly conserved ribosomal RNA (rRNA) genes, intergenic sequences, and specific toxin genes is currently the most reliable approach for bacterial, fungal and many viral pathogenic agents. When combined with fluorescence-based oligonucleotide detection systems, this approach provides real-time, quantitative, high fidelity analysis capable of single nucleotide allelic discrimination (4). These probe systems offer rapid turn around time (<2 h) and are suitable for high throughput, automated multiplex operations that are critical for clinical diagnostic laboratories. In this pilot program, we have used molecular beacon technology invented at the Public health Research Institute to develop a new generation of molecular probes to rapidly detect important agents of infectious diseases. We have also developed protocols to rapidly extract nucleic acids from a variety of clinical specimen including and blood and tissue to for detection in the molecular assays. This work represented a cooperative research development program between the Kramer-Tyagi/Perlin labs on probe development and the Perlin lab in sample preparation and testing in animal models.

David Perlin

2005-08-14

388

Interpretation of Rapid Diagnostic Tests for Influenza Background  

E-print Network

Viral isolation in cell culture remains the gold standard for influenza diagnosis and is available through the Alaska State Virology Laboratory. Many health care providers use rapid influenza tests to assist with prompt diagnosis and clinical management. Compared with viral culture, the sensitivity of rapid tests varies from 40–100 % (median, 70–75%), and the specificity varies from 52–100 % (median, 90–95%). Sensitivity and specificity of the rapid tests are affected by collection technique (e.g., a nasal wash may contain more antigen than a swab), specimen handling, sample quality (e.g., mucous can affect the absorption of the sample), and laboratory technique. Discussion When influenza activity is low, a positive rapid influenza test has a higher likelihood of being a false-positive. Therefore, in

Karleen Jackson Commissioner; Jay Butler; Chief Medical Officer; Joe Mclaughlin; Bradford D. Gessner

2007-01-01

389

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

390

Rapid frequency scan EPR  

NASA Astrophysics Data System (ADS)

In rapid frequency scan EPR with triangular scans, sufficient time must be allowed to insure that the magnetization in the x, y plane decays to baseline at the end of the scan, which typically is about 5 T2 after the spins are excited. To permit relaxation of signals excited toward the extremes of the scan the total scan time required may be much longer than 5 T2. However, with periodic, saw-tooth excitation, the slow-scan EPR spectrum can be recovered by Fourier deconvolution of data recorded with a total scan period of 5 T2, even if some spins are excited later in the scan. This scan time is similar to polyphase excitation methods. The peak power required for either polyphase excitation or rapid frequency scans is substantially smaller than for pulsed EPR. The use of an arbitrary waveform generator (AWG) and cross loop resonator facilitated implementation of the rapid frequency scan experiments reported here. The use of constant continuous low B1, periodic excitation waveform, and constant external magnetic field is similar to polyphase excitation, but could be implemented without the AWG that is required for polyphase excitation.

Tseitlin, Mark; Rinard, George A.; Quine, Richard W.; Eaton, Sandra S.; Eaton, Gareth R.

2011-08-01

391

Mobile medical image retrieval  

NASA Astrophysics Data System (ADS)

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 gained ground and many applications have been explored. This creates a new field of mobile information search & access and in this context images can play an important role as they often allow understanding complex scenarios much quicker and easier than free text. Mobile information retrieval in general has skyrocketed over the past year with many new applications and tools being developed and all sorts of interfaces being adapted to mobile clients. This article describes constraints of an information retrieval system including visual and textual information retrieval from the medical literature of BioMedCentral and of the RSNA journals Radiology and Radiographics. Solutions for mobile data access with an example on an iPhone in a web-based environment are presented as iPhones are frequently used and the operating system is bound to become the most frequent smartphone operating system in 2011. A web-based scenario was chosen to allow for a use by other smart phone platforms such as Android as well. Constraints of small screens and navigation with touch screens are taken into account in the development of the application. A hybrid choice had to be taken to allow for taking pictures with the cell phone camera and upload them for visual similarity search as most producers of smart phones block this functionality to web applications. Mobile information access and in particular access to images can be surprisingly efficient and effective on smaller screens. Images can be read on screen much faster and relevance of documents can be identified quickly through the use of images contained in the text. Problems with the many, often incompatible mobile platforms were discovered and are listed in the text. Mobile information access is a quickly growing domain and the constraints of mobile access also need to be taken into account for image retrieval. The demonstrated access to the medical literature is most relevant as the medical literature and their images are clearly the largest knowledge source in the medical field.

Duc, Samuel; Depeursinge, Adrien; Eggel, Ivan; Müller, Henning

2011-03-01

392

IMAPS: Imbricated authentication protocol suite for mobile users and groups  

Microsoft Academic Search

The rapid advancement and the wide-spread use of the Internet and wireless communications in our professional endeavors and personal lives are making ubiquitous authenti- cated connectivity for mobile users indispensable. Individuals and groups may roam within a network or across networks, either in infrastructure or ad hoc mode. In any case, uninterrupted authenticated communication would be required for numerous applications,

Nidal Aboudagga; Giacomo de Meulenaer; Mohamed Eltoweissy; Jean-Jacques Quisquater

2009-01-01

393

AnyPhone: Designing Mobile Phone Applications for Any Phone  

Microsoft Academic Search

The mobile phone is rapidly emerging as one of the most commonly carried pieces of personal, readily accessible digital technology. These phones are no longer just for making calls. They function as digital cameras, PDAs, internet consoles, and email and instant messaging clients. The demand for improved operating systems and programming languages has given rise to a wide range of

Eric Paulos; August Joki; Parul Vora; Anthony Burke

394

Effect of mobile phone radiation on heart rate variability  

Microsoft Academic Search

The rapid increase in the use of mobile phones (MPs) in recent years has raised the problem of health risk connected with high-frequency electromagnetic fields. There are reports of headache, dizziness, numbness in the thigh, and heaviness in the chest among MP users. This paper deals with the neurological effect of electromagnetic fields radiated from MPs, by studies on heart

V. I. Thajudin Ahamed; N. G. Karthick; Paul K. Joseph

2008-01-01

395

Adaptive audio-video streaming solution over IP mobile environments  

Microsoft Academic Search

Audio and video streaming over the Internet is becoming very attractive and popular. Thus, there is a need to provide efficient delivery of such applications to the growing number of demanding users. In addition, new types of devices, transportable and mobile are emerging rapidly. Now, common users are expecting to access their favorite Internet services anywhere, and through any equipment

Daniel Negru; Toufik Ahmed; Ahmed Mehaoua

2006-01-01

396

Routing With Adaptive Flooding in Heterogeneous Mobile Networks  

E-print Network

Routing With Adaptive Flooding in Heterogeneous Mobile Networks Anand Seetharam, Simon Heimlicher are suitable for networks connected by stable paths, but are outperformed by stateless flooding in sparse and rapidly changing networks. Neither routing nor flooding alone perform well in heteroge- neous networks

Kurose, Jim

397

Motivation Matters in Mobile Language Learning: A Brief Commentary  

ERIC Educational Resources Information Center

As highlighted in the original call for papers for this special issue, learning with mobile technologies is currently a rapidly developing area of interest for researchers, teachers, materials writers and app developers in the educational field, not least within language education. Yet to what extent is this growing interest realised and shared by…

Ushioda, Ema

2013-01-01

398

Designing a mobile user interface for automated species identification  

Microsoft Academic Search

Biological research in the field is constrained by the speed and difficulty of species determination, as well as by access to relevant information about the species encountered. However, recent work on vision-based algorithms raises the promise of rapid botanical species identification. The potential for mobile vision-based identification provides opportunities for new user interface techniques. To explore these issues, we present

Sean Michael White; Dominic Marino; Steven Feiner

2007-01-01

399

Can mobile virtual fitness apps replace human fitness trainer?  

Microsoft Academic Search

The increased need in promoting fitness activity and rapid growth of smart-phones has urged the development of mobile virtual fitness apps (MVFA). Yet, evaluation on these MVFA has been limited and, therefore, this study attempts to conduct preliminary evaluation on randomly sampled MVFA based on our proposed system workflow using theories of social support and persuasive technology, and the American

Ron Kwok Chi-Wai; Stanley Hui Sai-Chuen; Tania Mak So-Ning; Peter Wu Ka-Shun; Ken Lee Wing-Kuen; Clara Wong Choi-Ki

2011-01-01

400

Mobile phones in Africa: Who are the investors?  

Microsoft Academic Search

Mobile networks have developed rapidly in recent years in areas previously unserved Africa. Alongside the European Orange, Vodafone and Tigo (Millicom), there is South Africa's MTN and Zain and Moov from Middle East. Their strategy aims at reducing prices to increase market share, even though investment in the development of networks is slowing under the impact of the financial crisis.

Laura Recuero Virto

2009-01-01

401

Designing for persuasion: mobile services for health behavior change  

Microsoft Academic Search

There is a pressing need for an effective means of transforming health behaviors. Obesity, anxiety and other behavior-generated health conditions result in billions of dollars of healthcare costs and a great deal of human suffering. Technology innovations are rapidly presenting new delivery mechanisms that can be harnessed to influence health behaviors. The mobile platform is a uniquely persuasive delivery medium

Sunny Consolvo; Kendra Markle; Kevin Patrick; Kara Chanasyk

2009-01-01

402

Signature-based workload estimation for mobile 3D graphics  

Microsoft Academic Search

Until recently, most 3D graphics applications had been regarded as too computationally intensive for devices other than desktop comput- ers and gaming consoles. This notion is rapidly changing due to im- proving screen resolutions and computing capabilities of mass-market handheld devices such as cellular phones and PDAs. As the mobile 3D gaming industry is poised to expand, significant innovations are

Bren C. Mochocki; Kanishka Lahiri; Srihari Cadambi; Xiaobo Sharon Hu

2006-01-01

403

Signature-based workload estimation for mobile 3D graphics  

Microsoft Academic Search

Until recently, most 3D graphics applications had been regarded as too computationally intensive for devices other than desktop computers and gaming consoles. This notion is rapidly changing due to improving screen resolutions and computing capabilities of mass-market handheld devices such as cellular phones and PDAs. As the mobile 3D gaming industry is poised to expand, significant innovations are required to

B. C. Mochocki; K. Lahiri; S. Cadambi; X. S. Hu

2006-01-01

404

Virtual Credit Cards on Mobile for M-Commerce Payment  

Microsoft Academic Search

The number of credit companies has been increasing due to the directed and undirected extra incomes from credit card holders. It effects to rapid growing rate of the number of credit card holders. Each individual is holding many credit cards that are harder to manage than before. At the same time, the usage of gadget devices such as mobiles is

Narongrit Waraporn; Manawat Sithiyavanich; Hathaichanok Jiarawattanasawat; Narin Pakchai

2009-01-01

405

Cellular/Molecular Estrogen Mobilizes a Subset of Estrogen Receptor--  

E-print Network

with the plasma membrane and/or cytoplasmic organelles. Here we used a combination of serial- section electron treatment mobilizes these vesicle clusters toward synapses. Estrogen receptor- is present in approximately(s) mediating the rapid effects of estrogen could be located at the plasma membrane and/or in cytoplasmic

Woolley, Catherine

406

Holistic control system design for large mobile irrigation machines  

Microsoft Academic Search

Large mobile irrigation machines are self-propelled sprinkler irrigation systems which farmers are rapidly adopting due to the high precision of the irrigation ap- plication. Although it is highly desirable that control systems be used with such machines to both optimise the irrigation water volume applied to field crops and optimise water use efficiency, there are difficulties in applying classical control

Alison McCarthy; Nigel Hancock; Steven Raine

407

Preserving User Location Privacy in Mobile Data Management Infrastructures  

E-print Network

the Global Positioning Systems (GPS), GSM, RF- ID and the Wireless LAN have undergone rapid developments and items accurately also raises a new concern ­ intrusion of location privacy. According to [4], locationPreserving User Location Privacy in Mobile Data Management Infrastructures Reynold Cheng1 , Yu

Cheng, Reynold Cheng Chun

408

Exploiting Context Information in Spoken Dialogue Interaction with Mobile Devices  

E-print Network

human-device interaction is clear. As personal devices continue to shrink in size yet expand Cambridge, MA 02142, USA Abstract. Today's mobile phone technology is rapidly evolving towards a personal supporting spoken human-human communication, speech and language technology will prove to be vital enablers

409

Intensity, repetitiveness, and directionality of habitual adolescent mobility patterns influence the tibial diaphysis morphology of athletes  

Microsoft Academic Search

Mobility patterns affect the loads placed on the lower limbs during locomotion and may influence variation in lower limb diaphyseal robusticity and shape. This relationship commonly forms the basis for inferring mobility patterns from hominin fossil and skeletal remains. This study assesses the correspondence between athletic histories, varying by loading intensity, repetition and directionality, measured using a recall questionnaire, and

Colin N. Shaw; Jay T. Stock

2009-01-01

410

Liver glycogen, glucose mobilization and freezing survival in chorus frogs, Pseudacris triseriata  

Microsoft Academic Search

We compared liver glycogen stores and glucose mobilization during freezing among winters in chorus frogs, Pseudacris triseriata, where populations varied in freezing survival. We also characterized tissue glycogen levels across the annual cycle. Frogs with low liver glycogen stores mobilized low amounts of glucose during freezing, and these were correlated with population variation in freezing survival. Moreover, liver glycogen stores

Jennifer L. Jenkins; David L. Swanson

2005-01-01

411

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

412

Adaptable Mobile Applications through SATIN: Exploiting Logical Mobility in Mobile Computing Middleware  

Microsoft Academic Search

Abstract: IntroductionWith the recent developments in wireless networks (Wavelan, Bluetooth) and the sales of mobile computers of any kind (such as laptopcomputers, Personal Digital Assistants (PDAs), mobile phones etc.) soaring, we are experiencing the availability of increasinglypowerful mobile computing environments that can roam across different types of networks. We have also recently witnessed theacceptance of Logical Mobility (LM) techniques, or

Stefanos Zachariadis; Cecilia Mascolo

2003-01-01

413

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

414

Mobile Modelling for Crowdsourcing Building Interior Data  

NASA Astrophysics Data System (ADS)

Indoor spatial data forms an important foundation to many ubiquitous computing applications. It gives context to users operating location-based applications, provides an important source of documentation of buildings and can be of value to computer systems where an understanding of environment is required. Unlike external geographic spaces, no centralised body or agency is charged with collecting or maintaining such information. Widespread deployment of mobile devices provides a potential tool that would allow rapid model capture and update by a building's users. Here we introduce some of the issues involved in volunteering building interior data and outline a simple mobile tool for capture of indoor models. The nature of indoor data is inherently private; however in-depth analysis of this issue and legal considerations are not discussed in detail here.

Rosser, J.; Morley, J.; Jackson, M.

2012-06-01

415

Human organisms in varying gravicondition on Earth  

NASA Astrophysics Data System (ADS)

Cosmic biology shows that human organisms in conditions of weightlessness or microgravity release themselves of Ca. Normal Ca in bones is needed for normal gravity conditions and become unnecessary in merely 100 km above Earth. The loss of Ca occurs very effectively and rapidly: just a few months in conditions of weightlessness is enough to bring an important Ca loss from a skeleton. The 100 km range is not found on the terrestrial surface but a few km vertical range between planetary tectonic blocks is characteristic for the planet Earth. And what is important, this range is very stable in a time scale of the human beings existence on Earth, say, a few million years. The most uplifted tectonic block-sector of Earth - African continent - constantly rises during the last few million years. In the tectonic sectoral structure of the eastern hemisphere with the center in the Pamirs-Hindukush uplifted African sector (+ +) is opposed by the also uplifted Asian sector (+). Both risen sectors are separated by two subsided sectors: Eurasian ( -) and Indoceanic (- -). The sectoral tectonics is dup licated in other geospheres (from the core to atmosphere) and is rather clear in distribution of the great human races. African sector is occupied by negroids, Asian by mongoloids, Eurasian by europeoids, Indoceanic by australoids. What is a principal difference between them in physical structure? The great races of the risen sectors are less hairy with rare curly or straight hairs and have lighter skeleton. The great races of the fallen sectors are shaggy with dense soft curly hairs and have denser bones. Otherwise, in the risen sectors with more uplifted surfaces and diminished gravity developed "lighter" organisms than in the fallen sectors with subsided surfaces and increased gravity. An evolution during million of years in conditions of very small gravity gradient gave a result which can be compared with a very short time evolution in conditions of very sharp drop in gravity (cosmic experiments). Lightening bone tissues corresponds to reducing gravity. The timescale of million years is probably too much for achieving noticeable results in changing flexible human races by changing gravity. Thus, 2000 to 3000 years was sufficient to transform mongoloids to Polynesians (actually europeoids) and europeoids (hamits) to semi-africans in Ethiopia. In the first case migration was from sector + to segment -, in the second case from sector - to sector + +. Ref.: [1] Kochemasov G.(2000) Geoid and formation by its planetary gravity fields great human races and Polynesian "superrace" // 33rd COSPAR Sci. Assem., Warsaw, Abstr. (CD-ROM); [2] Kochemasov G.(1998) Unequal gravity sectors and great human races // 32nd COSPAR SCI, Assem., Nagoya, Abstr.,p.384.

Kochemasov, G.

416

User case study and network evolution in the mobile phone sector (a study on current mobile phone applications)  

Microsoft Academic Search

Networked games are becoming more and more important in the last years. One major focus is reducing the size and increasing the portability of the game devices. Therefore mobile phones are becoming a very popular platform for games. Their availability and rapidly increasing technology also promote them as a valid gaming device option.Nevertheless there are other portable game devices, such

Tobias Fritsch; Hartmut Ritter; Jochen H. Schiller

2006-01-01

417

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

418

Investigating Privacy-Augmented Displays for Mobile Devices  

Microsoft Academic Search

With more individuals accessing sensitive data in public situations, designers of mobile applications must determine the best ways to keep that information private. This research looks at using pixels, which convey information using color, in conjunction with text in order to maintain desired levels of privacy in otherwise non-private displays. Since privacy can vary according to a person's preferences, a

Andrea Grimes; Peter Tarasewich

419

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

420

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

421

Scheduling and Control of Mobile Communications Networks with Randomly Time  

E-print Network

02912 USA hjk@dam.brown.edu Abstract-- Consider a communications network consisting of mobiles, some are weakened, and the distributions of the in- put file lengths can be heavy tailed. The resulting controls with randomly varying links, routing in ad-hoc networks, perturbed stochastic Liapunov functions, heavy tailed

422

Planning for autonomous door opening with a mobile manipulator  

Microsoft Academic Search

Computing a motion that enables a mobile manip- ulator to open a door is challenging because it requires tight coordination between the motions of the arm and the base. Hard-coding the motion, on the other hand, is infeasible since doors vary widely in their sizes and types, some doors are opened by pulling and others by pushing, and indoor spaces

Sachin Chitta; Benjamin J. Cohen; Maxim Likhachev

2010-01-01

423

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

424

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

425

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

426

Flutter-Prediction Tool for Flight-Test-Based Aeroelastic Parameter-Varying Models  

Microsoft Academic Search

Inthiswork,aparameter-varyingestimationframeworkisproposedtoincreasetheefficiencyof flighttesting.The framework generates a set of tools to rapidly evaluate parameters required to certify an aircraft during envelope expansion. The primary innovation is a generalized aeroelastic parameter-varying framework that allows for a variety of approaches and test procedures. The framework considers the variations of aircraft parameters due to flight conditions. The core algorithms are based on the well-developed linear

Dario H. Baldelli; Jie Zeng; Chuck Harris

2009-01-01

427

Effects of seasonally varying dietary crude protein levels on collared peccary population dynamics: a simulation study.  

E-print Network

weight dynamics for juvenile and adult peccaries on varying CP diets compared favorably with similar data collected from captive animals. However, simulated individuals may lose weight too rapidly when dietary CP remains at extremely low levels... collared peccaries in south Texas. Low (1970) recorded juvenile survival rates of 69%%d in west Texas. In the model, survival rates of both preweaning and postweaning peccaries are calculated such that the probability of surviving to the adult state...

Wilber, James Paul

2012-06-07

428

Rapid Target Locator  

NASA Astrophysics Data System (ADS)

Like beauty, "real time" is in the eye of the beholder. Airborne electro-optical (EO) reconnaissance systems can transmit an image in real time to a display in an imagery interpreter's (II) console, but it then takes around 15 min for the II to issue his report. Thus, while the II sees real-time imagery, the officer in the field who requested the coverage sees a report that is not real time and that may be rapidly losing its value. The greatest delay in issuing the report comes from having to determine where the target is. This is currently done on the Analytical Photogrammetric Positioning System (APPS) that uses stereophotomaps to determine the x, y, z coordinates of a point on the ground; it takes many minutes to measure the position of each target. Our goal is to reduce that portion of the recce cycle that uses Itek technology--from time over target to issuance of a report--to less than 2 min. A still shorter time would be desirable in the face of rapidly moving targets,, but there is little point in making the time negligible compared to that required for Oil to evaluate the report and issue orders, plus the time required to respond to the orders. It is clear that we can achieve this 2-min goal only if we can greatly reduce the time it now takes to determine the location of a target. The accuracy with which a target is located should not suffer while the time is reduced. There is a tradeoff to be made between timeliness and accuracy when the target is moving: neither short time with poor accuracy nor high accuracy with long time is desirable. We have arbitrarily adopted goals in which a target can be located to about 100 ft in less than half a minute. The experiments reported here investigated one concept, called Rapid Target Locator (RATL), for achieving this performance.

Bisbee, John

1985-12-01

429

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

430

A robust signalling system for land mobile satellite services  

NASA Technical Reports Server (NTRS)

Presented here is a signalling system optimized to ensure expedient call set-up for satellite telephony services in a land mobile environment. In a land mobile environment, the satellite to mobile link is subject to impairments from multipath and shadowing phenomena, which result in signal amplitude and phase variations. Multipath, caused by signal scattering and reflections, results in sufficient link margin to compensate for these variations. Direct signal attenuation caused by shadowing due to buildings and vegetation may result in attenuation values in excess of 10 dB and commonly up to 20 dB. It is not practical to provide a link with sufficient margin to enable communication when the signal is blocked. When a moving vehicle passes these obstacles, the link will experience rapid changes in signal strength due to shadowing. Using statistical models of attenuation as a function of distance travelled, a communication strategy has been defined for the land mobile environment.

Irish, Dale; Shmith, Gary; Hart, Nick; Wines, Marie

1989-01-01

431

Mobility of icy sand packs, with application to Martian permafrost  

USGS Publications Warehouse

[1] 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. Copyright 2009 by the American Geophysical Union.

Durham, W.B.; Pathare, A.V.; Stern, L.A.; Lenferink, H.J.

2009-01-01

432

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

433

Rapid Prototype Modeling  

NSDL National Science Digital Library

Teachers' Domain presents this video as part of a series on advanced technological education. In the clip, students describe what is involved in rapid prototyping technology, including how three-dimensional models are produced. The video presents a studentâÂÂs point of view on the educational experience at community college, which offers hands-on experience that employers are looking for. The video may be viewed online or downloaded. To download the clip, users must create a free login for Teachers' Domain. Running time for this MPEG 4 video is 2:08. Educators will also find a background essay, discussion questions, and standards alignment for the material.

2010-10-01

434

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

435

FFAGS for rapid acceleration  

NASA Astrophysics Data System (ADS)

When large transverse and longitudinal emittances are to be transported through a circular machine, extremely rapid acceleration holds the advantage that the beam becomes immune to nonlinear resonances because there is insufficient time for amplitudes to build up. Uncooled muon beams exhibit large emittances and require fast acceleration to avoid decay losses and would benefit from this style of acceleration. The approach here employs a fixed-field alternating gradient or FFAG magnet structure and a fixed-frequency acceleration system. Acceptance is enhanced by the use only of linear lattice elements, and fixed-frequency rf enables the use of cavities with large shunt resistance and quality factor.

Johnstone, C.; Koscielniak, S.

2003-05-01

436

Right-Rapid-Rough  

NASA Technical Reports Server (NTRS)

IDEO (pronounced 'eye-dee-oh') is an international design, engineering, and innovation firm that has developed thousands of products and services for clients across a wide range of industries. Its process and culture attracted the attention of academics, businesses, and journalists around the world, and are the subject of a bestselling book, The Art of Innovation by Tom Kelley. One of the keys to IDEO's success is its use of prototyping as a tool for rapid innovation. This story covers some of IDEO's projects, and gives reasons for why they were successful.

Lawrence, Craig

2003-01-01

437

Rapid flash lamp  

SciTech Connect

A method and apparatus for providing low peak time and pulse width actinic energy from a lamp by varying the input energy of a capacitive ignition circuit having relatively high voltage to the lamp. The lamp comprises a pair of electrodes disposed within a light transparent envelope in which a combustible and an oxidizing gas reaction combination is located. The combustible is preferably shredded zirconium which is in contact with and provides an electrical discharge path between the electrodes. The gas is preferably pressurized oxygen.

Gavenonis, Thomas L. (544 Sand Hill Rd., R.D. #3, Montoursville, Lycoming County, PA 17754); Hewitt, William H. (24 G Acres Dr., Essex County, Bradford, MA 01830)

1989-01-01

438

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

439

Extensible Hardware Architecture for Mobile Robots  

Microsoft Academic Search

Abstract—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 soon to be integrated onto the K10 series of human-robot,collaboration research robots, this achitecture 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

Eric Park; Linda Kobayashi; Susan Y. Lee

2005-01-01

440

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

441

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.

1998-01-01

442

Intelligent mobile security systems  

SciTech Connect

This paper reports that mobile security systems are becoming increasingly important to military (Army, Air Force) and non-military (Drug Enforcement Agency, Border Patrol) organizations as the level and sophistication of terrorist activity increases. Frequently, organizations are required to deploy at remote sites on little notice. To ensure protection of life and equipment, security systems are sometimes required. Often, the personnel deployed on these missions are not adequately trained in the selection, installation, and operation of today's complex security equipment. The Intelligent Mobile Security System (IMSS) concept, as being developed by Sandia National Laboratories (SNL), allows untrained, non-technical personnel to configure, deploy, operate, and troubleshoot temporary/mobile physical security system. The IMSS may be used at nuclear facilities.

Allen, M.S. (Advanced Systems Integration, Sandia National Lab., Albuquerque, NM (US))

1991-01-01

443

Rapid Coarsening of Ion Beam Ripple Patterns by Defect Annihilation  

SciTech Connect

Ripple patterns formed on Pt(111) through grazing incidence ion beam erosion coarsen rapidly. At and below 450 K coarsening of the patterns is athermal and kinetic, unrelated to diffusion and surface free energy. Similar to the situation for sand dunes, coarsening takes place through annihilation reactions of mobile defects in the pattern. The defect velocity derived on the basis of a simple model agrees quantitatively with the velocity of monatomic steps illuminated by the ion beam.

Hansen, Henri; Messlinger, Sebastian; Stoian, Georgiana [I. Physikalisches Institut, RWTH Aachen, 52056 Aachen (Germany); Redinger, Alex [I. Physikalisches Institut, RWTH Aachen, 52056 Aachen (Germany); II. Physikalisches Institut, Universitaet zu Koeln, 50937 Koeln, Zuelpicher Strasse 77 (Germany); Krug, Joachim [Institut fuer Theoretische Physik, Universitaet zu Koeln, 50937 Koeln, Zuelpicher Strasse 77 (Germany); Michely, Thomas [II. Physikalisches Institut, Universitaet zu Koeln, 50937 Koeln, Zuelpicher Strasse 77 (Germany)

2009-04-10

444

Mobile money, smallholder farmers, and household welfare in kenya.  

PubMed

The use of mobile phones has increased rapidly in many developing countries, including in rural areas. Besides reducing the costs of communication and improving access to information, mobile phones are an enabling technology for other innovations. One important example are mobile phone based money transfers, which could be very relevant for the rural poor, who are often underserved by the formal banking system. We analyze impacts of mobile money technology on the welfare of smallholder farm households in Kenya. Using panel survey data and regression models we show that mobile money use has a positive impact on household income. One important pathway is through remittances received from relatives and friends. Such remittances contribute to income directly, but they also help to reduce risk and liquidity constraints, thus promoting agricultural commercialization. Mobile money users apply more purchased farm inputs, market a larger proportion of their output, and have higher profits than non-users of this technology. These results suggest that mobile money can help to overcome some of the important smallholder market access constraints that obstruct rural development and poverty reduction. PMID:25286032

Kikulwe, Enoch M; Fischer, Elisabeth; Qaim, Matin

2014-01-01

445

Mobile Money, Smallholder Farmers, and Household Welfare in Kenya  

PubMed Central

The use of mobile phones has increased rapidly in many developing countries, including in rural areas. Besides reducing the costs of communication and improving access to information, mobile phones are an enabling technology for other innovations. One important example are mobile phone based money transfers, which could be very relevant for the rural poor, who are often underserved by the formal banking system. We analyze impacts of mobile money technology on the welfare of smallholder farm households in Kenya. Using panel survey data and regression models we show that mobile money use has a positive impact on household income. One important pathway is through remittances received from relatives and friends. Such remittances contribute to income directly, but they also help to reduce risk and liquidity constraints, thus promoting agricultural commercialization. Mobile money users apply more purchased farm inputs, market a larger proportion of their output, and have higher profits than non-users of this technology. These results suggest that mobile money can help to overcome some of the important smallholder market access constraints that obstruct rural development and poverty reduction. PMID:25286032

Kikulwe, Enoch M.; Fischer, Elisabeth; Qaim, Matin

2014-01-01

446

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

447

Land mobile communications satellite  

NASA Astrophysics Data System (ADS)

The economic value and salient technical and operational characteristics of a European Land Mobile Communication Satellite (LMCS) to complement and supplement the demand for mobile services of Western European countries in the 1995 to 2005 time frames were assessed. A significant future expansion of demand for LCMS services on the part of the public is anticipated. Important augmentations of current service capabilities could be achieved by a satellite service, improving the overall system performances and/or assisting the PTT's in containing their investments in the required infrastructure. The satellite service itself could represent a profitable revenue producer.

Carnebianca, C.; Pavesi, B.; Tuozzi, A.

1986-09-01

448

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

449

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

450

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

451

Upward Mobility Program Handbook  

NASA Technical Reports Server (NTRS)

This handbook contains the policy and program objectives of the NASA Upward Mobility Program. In addition it gives guidance regarding program planning, implementation, and evaluation and also describes the roles and responsibilities of key personnel responsible for the successful implementation of the program. The Federal Personnel Manual Chapter 720 explains the Federal Government's policy on upward mobility and is available from the installation personnel office upon request. This handbook is applicable to all NASA installations. Unless specifically limited, all responsibilities set forth in this plan for the Installation Personnel Director may be administered wholly or in part by the Personnel Director's designee. This handbook will be revised by page changes.

1982-01-01

452

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

453

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

454

Distributed Mobility Management Scheme for Mobile IPv6  

NASA Astrophysics Data System (ADS)

Mobile IPv6 and Network Mobility (NEMO) have been standardized as IP extensions. While these technologies are planned to be adopted by several communities, such as the vehicle, aviation, and cellular industries, Mobile IPv6 has serious deployment issues such as scalability, protocol resilience, and redundancy. In these technologies, a special router called a home agent is introduced to support the movement of mobile nodes. This home agent introduces overlapping, inefficient routes, and becomes a single point of failure and a performance bottleneck. In this paper, a new concept for scalable and dependable mobility management scheme is proposed. Multiple home agents serve the same set of mobile nodes. The Home Agent Reliability protocol and Home Agent migration are introduced to achieve this concept. We also propose an overlay network named a Global Mobile eXchange (GMX) that efficiently handles data traffic from and to mobile nodes, and operates home agents as would an Internet eXchange Point (IXP).

Wakikawa, Ryuji; Valadon, Guillaume; Shigechika, Noriyuki; Murai, Jun

455

The Blackboard Mobile Learn app for Android devices allows you to access your Blackboard courses in the palm of your hands.  

E-print Network

The Blackboard Mobile Learn app for Android devices allows you to access your Blackboard courses in the palm of your hands. Please note: The steps may vary depending on which Android phone you are using. 1 in to CUNY Portal. Blackboard Mobile Learn for Android 3 4 Revised: 3.27.2014 Bb9: Blackboard Mobile

Qiu, Weigang

456

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

457

Rapid Prototyping Roadmapping  

NASA Technical Reports Server (NTRS)

Roadmapping has long been thought of as a process for getting from point A to point B within a single discipline. Roadmapping for Rapid Prototyping has multiple paths of which we will diagram in this meeting. When you consider the dynamic change that the computer has made in both developing as well as manufacturing products, we could only assume that further electronic medium matched with mechanical inventions will continue. This industry roadmap is intended to point and lead us to the promised manufacturing land. We hope to reduce the inherent risk associated with technology development by providing a clear goal of mapping to a manufacturing process. The work of DoE in 1994 was excellent and began a journey that would benefit the decision makers and allow for choices that would be good investment decisions. While this work included government agencies, this map is broader and includes industry and academia input.

Cooper, Kenneth G.

1998-01-01

458

Rapid response systems.  

PubMed

Rapid response systems (RRSs) are one of the first organisation-wide, patient-focused systems to be developed to prevent potentially avoidable deaths and serious adverse events such as cardiac arrests. RRSs identify seriously ill and at-risk patients and those whose condition is deteriorating, using abnormal vital signs and observations that trigger an urgent response by staff who are able to deal with any medical emergency. RRS teams also respond to staff concern - any bedside nurse or doctor who is concerned about his or her patient can seek assistance. RRSs require the support of the whole hospital. This includes resources, educational programs and agreed ways of evaluating RRS effectiveness. RRSs may reduce deaths by up to one-third and cardiac arrests by up to 50%. PMID:25358575

Hillman, Kenneth M; Chen, Jack; Jones, Daryl

2014-11-01

459

A mobile phone: mobility, materiality and everyday Swahili trading practices  

Microsoft Academic Search

This article engages with the recent literature on material culture, ‘follow-the-thing geographies’, mobility and mobile communication technologies by linking these theoretical reflections to ethnographic research in East Africa. Using the biography of a specific mobile phone as a window through which to shed light on the spatial and cultural practices in which the object is embedded, it attempts to provide

Julia Pfaff

2010-01-01

460

On Mobility and Context of Work: Exploring Mobile Police Work  

Microsoft Academic Search

This article aims to propose some elements for a theory of mobility. Mobility is the structural attribute of an age that heavily relies on information and mobile devices as identified by observed, cross-contextual research. It pervades most work and social organizations in various cultural and institutional expressions. Organizational structures rely heavily on the relationships of construction and utilization of information

Daniele Pica; Carsten Sørensen; David Allen

2004-01-01

461

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

462

Mobile attachment: emotional attachment towards mobile devices and services  

Microsoft Academic Search

In my thesis I address the topic of mobile attachment. I provide a theoretical framework for mobile attachment together with influencing factors that indicate user's emotional attachment (EA) to mobile devices and services. I investigate how the concept of user experience (UX) and EA are linked together and I outline how user behavior driven experience sampling can be exploited to

Alexander Meschtscherjakov

2009-01-01

463

Advances in rapid prototyping  

SciTech Connect

Recent advances in stereolithography and selective laser sintering have had a significant impact on the overall quality of parts produced using these rapid prototyping processes. The development and implementation of 3D System`s QuickCast{trademark} resin and software for building investment casting patterns have proven to be major steps toward fabricating highly accurate patterns with very good surface finishes. Sandia uses patterns generated from rapid prototyping processes to reduce the cycle time and cost of fabricating prototype parts in support of a Sandia National Laboratories managed program called FASTCAST. As participants in the Beta test program for QuickCast{trademark} resin and software, they experienced a steep learning curve and were able to build accurate parts in a short period of time. It is now possible, using this technology, to produce highly accurate prototype parts as well as acceptable firs article and small lots size production parts. They use the Selective Laser Sintering (SLS) process to fabricate prototype wax patterns for investment casting. DTM Corporation recently introduced the use of their polycarbonate material for fabricating investment casting patterns. The polycarbonate material is processed significantly faster, with improved strength, dimensional stability, and without a support structure during the build process. Sandia is currently changing from investment casting wax to polycarbonate for the fabrication of investment casting patterns using the SLS process. This presentation will focus on the successes with these new materials from the standpoints of application, accuracy, surface finish, and post processing. Also presented will be examples of parts manufactured by these processes.

Atwood, C.L.; McCarty, G.D.; Pardo, B.T.; Bryce, E.A.

1993-12-31

464

Advanced mobile phone service  

Microsoft Academic Search

The advanced mobile phone service (AMPS) system, an FM cellular radio system in the final stages of development, is described. A brief description of the system is followed by a discussion of the control algorithms which are basic to its operation. Finally, a status report is presented on the Chicago developmental system (an operational cellular system) and the cellular test

F. H. Blecher

1980-01-01

465

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

466

Mobilizing the Moral Majority.  

ERIC Educational Resources Information Center

The Moral Majority has been more successful in mobilizing conservative Christians than three other evangelical groups--Third Century Publishers, Christian Voice, and the Religious Roundtable. According to the literature on social movements, four possible explanations for the success of such groups are that they have access to financial resources,…

Liebman, Robert C.

467

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

468

Mobile Environmental Education Laboratory.  

ERIC Educational Resources Information Center

In May, 1972, the Kingsport (Tennessee) City School System received financial assistance from the Tennessee Valley Authority to plan, develop, and implement, as a demonstration environmental education project, the utilization of a mobile laboratory for conducting environmental studies. The project, as described in this booklet, identified four…

Childress, Ronald B.

469

Mobile and embedded databases  

Microsoft Academic Search

Recent advances in device technology and connectivity have paved the way for next generation appli- cations that are data-driven, where data can reside anywhere, can be accessed at any time, from any client. Also, advances in memory technology are increasing the capacities of RAM and Flash, and their costs down. These trends lead to applications that are mobile, embedded, and

Anil Nori

2007-01-01

470

A Mobile Education  

ERIC Educational Resources Information Center

Since 2008, when iStanford stormed onto the college scene as the first campus mobile app, schools from Amarillo College (Texas) to Vanderbilt University (Tennessee) have rushed to create their own offerings. Some have elected to do the work in-house; others have licensed the software from a vendor. Still others hope to bottle the same magic that…

Schaffhauser, Dian

2011-01-01

471

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

472

Beyond device mobility  

Microsoft Academic Search

Users, application services, single files and files collections, computers, detachable memory, distributed network storage -- this is far from being the comprehensive list of thinkable today networked objects. More importantly, all of these objects can be mobile on their own or in any combination and independently of each other. The technology around information distribution, sharing, and retrieval drives towards new

Yuri Ismailov

2008-01-01

473

Exercise, Mobility and Aging  

Microsoft Academic Search

The elderly population is growing both in size and in proportion of the total population. The costs to the community of the elderly being in poor health are also growing proportionately. The beneficial effects of exercise on various phys- iological and psychological parameters in the elderly have been well established. The effects of exercise on the mobility and independence of

Monica J. Daley; Warwick L. Spinks

2000-01-01

474

Effects of Mobile Communication  

Microsoft Academic Search

Before reviewing some of the key consequences of mobile communication technology, a brief discussion of how they fit within the media effects paradigm is in order. At the risk of oversimplification, we understand the media effects paradigm as a framework for understanding how mass media content influences attitudes and behavior of audience members. To be fair, it is important to

Scott W. Campbell

475

The Mobile Costume Shop.  

ERIC Educational Resources Information Center

Discusses the difficulties of costume construction for high school theater productions. Advances a plan (and provides a design) for a mobile costume shop which contains the basic needs of a functional costume facility, using only 60 square feet of space. Lists every element and implement needed. (PA)

Witherspoon, Cindy; Nelson, Steve

1998-01-01

476

Aspecialinvitationforguestswith limited mobility  

E-print Network

refreshments, as well as special treats, activities and games for children. Join us for a more relaxedAspecialinvitationforguestswith · limited mobility · small children · special needs · a desire (upper level) Graduating Students Entrance for check-in Family Friendly Zone (Video Screen

Papautsky, Ian

477

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

478

Pawson, M. and Greenberg, S. (2008) Extremely Rapid Usability Testing  

E-print Network

in a busy trade show or conference exhibit hall booth. Consequently, we developed the Extremely Rapid.greenberg@ucalgary.ca Abstract The trade show booth on the exhibit floor of a conference is traditionally used for company an opportunity, for it can give the development team easy access to many varied participants for usability

Greenberg, Saul

479

A Rapid Geometry Engine for Preliminary Aircraft Design  

Microsoft Academic Search

A rapid geometry engine (RAGE) has been developed to allow for preliminary design analysis without labor-intensive CAD support. The geometry tool builds complex aircraft configurations using a component-based approach. Basic algorithms for creating the pri- mary components are presented and discussed. Examples of many widely varying geometry models are shown. A select geometry model is analyzed with several aerodynamic analysis

David L. Rodriguez; Peter Sturdza

480

Selective Predictive Value of Rapid Automatized Naming in Poor Readers.  

ERIC Educational Resources Information Center

This study considered data from two longitudinal studies of students which included 154 students of varied reading abilities and 64 poor readers who had been evaluated from third through eighth grades. Single-word reading was strongly predicted from third-grade rapid naming only with poor readers, even when other relevant factors were controlled.…

Meyer, Marianne S.; Wood, Frank B.; Hart, Lesley A.; Felton, Rebecca H.

1998-01-01

481

Future of Military Mobile Computing.  

National Technical Information Service (NTIS)

Significant and enduring are two words that reflect the reality we face today regarding mobile computing technologies. The ubiquity of smart phones, tablets, and other mobile computing devices in the commercial world makes cellular technologies a must for...

B. Caulkins

2012-01-01

482

Morphing content in mobile applications  

E-print Network

Smart phones are quickly becoming an integral part of our everyday lives. However, the mobile industry is still young, and the full potential of mobile phones has yet to be tapped. In this thesis, I present the design of ...

Wang, Kevin Y

2009-01-01

483

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

484

Strong coupling problem with time-varying sound speed  

SciTech Connect

For a single scalar field with unit sound speed minimally coupled to Einstein gravity, there are exactly three distinct cosmological solutions which produce a scale invariant spectrum of curvature perturbations in a dynamical attractor background, assuming vacuum initial conditions: slow-roll inflation; a slowly contracting adiabatic ekpyrotic phase, described by a rapidly-varying equation of state; and an adiabatic ekpyrotic phase on a slowly expanding background. Of these three, only inflation remains weakly coupled over a wide range of modes, while the other scenarios can produce at most 12 e-folds of scale invariant and Gaussian modes. In this paper, we investigate how allowing the speed of sound of fluctuations to evolve in time affects this classification. While in the presence of a variable sound speed there are many more scenarios which are scale invariant at the level of the two-point function, they generically suffer from strong coupling problems similar to those in the canonical case. There is, however, an exceptional case with superluminal sound speed, which suppresses non-Gaussianities and somewhat alleviates strong coupling issues. We focus on a particular realization of this limit and show these scenarios are constrained and only able to produce at most 28 e-folds of scale invariant and Gaussian perturbations. A similar bound should hold more generally - the condition results from the combined requirements of matching the observed amplitude of curvature perturbations, demanding that the Hubble parameter remain sub-Planckian and keeping non-Gaussianities under control. We therefore conclude that inflation remains the unique cosmological scenario, assuming a single degree of freedom on an attractor background, capable of producing arbitrarily many scale invariant modes while remaining weakly coupled. Alternative mechanisms must inevitably be unstable or rely on multiple degrees of freedom.

Joyce, Austin; Khoury, Justin [Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)

2011-10-15

485

Performance of Transmit Precoding in Time-Varying Point-to-Point and Multi-User MIMO Channels  

Microsoft Academic Search

Transmit precoding strategies in multiple-input multiple-output (MIMO) systems provide a mechanism for increasing the performance of point-to-point links and enable spatial division multiple access in multi-user networks. However, communication node mobility in such systems can lead to rapid channel variation which limits the quality of attainable channel state information (CSI). This paper explores the performance of point-to-point and multi-user precoding

Adam L. Anderson; James R. Zeidler; Michael A. Jensen

2006-01-01

486

Mobile user environment and satellite diversity for NGSO S-PCN's  

NASA Technical Reports Server (NTRS)

The performance of satellite diversity under the influence of the mobile user environment is analyzed. To this end, a digital channel model is presented which takes into account the elevation angle as well as the user mobility in a given environment. For different LEO and MEO systems and for varying mobile user environments, some crucial benefits and drawbacks of satellite diversity are discussed. Specifically, the important GW service area concept is introduced. The conclusions are validated by numerical results from computer simulations. Globalstar (LEO) and Inmarsat (MEO) are compared in terms of visibility, service availability and equivalent handover complexity for different environments and user mobility.

Werner, Markus; Bischl, Hermann; Lutz, Erich

1995-01-01

487

PI CONTROLLERS PERFORMANCES FOR A PROCESS MODEL WITH VARYING DELAY  

E-print Network

.petit@ensmp.fr Keywords: Process Control; Delay systems; Varying delay; PI controllers; Smith Predictor. Abstract Varying with all others, including Smith predictors, when the delay variation is not known. 1 Introduction In spite

488

Increasing clinical presence of mobile communication technology: avoiding the pitfalls.  

PubMed

Mobile communication technologies are employed in many diverse areas of healthcare delivery to provide improved quality and efficiency of communication and facilitate increased rapidity of data or information transfer. Mobile phones enable healthcare professionals to possess a portable platform from which to provide many healthcare-related applications and are a popular means to directly communicate with colleagues and patients. As involvement of mobile communication technology in healthcare delivery continues to rapidly expand, there are also important considerations of relevance to patient safety and security as a result. Here, we review the previous evidence of reported clinical risks associated with mobile communication technology, such as electromagnetic interference, confidentiality and data security, distraction/noise, infection control, and cross contamination. In conclusion, although mobile phones provide much putative potential improvement to healthcare delivery, further evaluation and research are required to both inform and protect health professionals and users of such technology in the healthcare environment and provide the evidence base to support the provision of clear and comprehensive guidelines. PMID:21780941

Visvanathan, Akila; Gibb, Alan P; Brady, Richard R W

2011-10-01

489

Social mobility and educational selection  

Microsoft Academic Search

There is a close interactive relationship between social mobility and educational selection. On one side, the character, direction,\\u000a speed, level, methods and trends of social mobility affect the aims, goals, functions, scope, strategy, content and methods\\u000a of choice in education. On the other side, the goals, basis and means of choosing education promote inter-generational social\\u000a mobility, competitive mobility and structural

Zefang Dong; Yanbin Wang; Wenjiao Chen

2009-01-01

490

Personal Privacy in Mobile Networks  

Microsoft Academic Search

\\u000a Technical enhancements of mobile technologies and the pervasive diffusion of mobile devices have radically changed the way\\u000a in which users communicate and interact. Users stay virtually connected anywhere anytime, and information on their location\\u000a and mobility is easily available and accessible. As a consequence, new mobile and online applications have been developed,\\u000a which need the location information of the users

Claudio A. Ardagna; Sabrina Capitani di Vimercati; Pierangela Samarati

491

Rapid prototyping for neuroscience and neural engineering.  

PubMed

Rapid prototyping (RP) is a useful method for designing and fabricating a wide variety of devices used for neuroscience research. The present study confirms the utility of using fused deposition modeling, a specific form of RP, to produce three devices commonly used for basic science experimentation. The accuracy and precision of the RP method varies according to the type and quality of the printer as well as the thermoplastic substrate. The printer was capable of creating device channels with a minimum diameter of 0.4 or 0.6mm depending on the orientation of fabrication. RP enabled the computer-aided design and fabrication of three custom devices including a cortical recording/stroke induction platform capable of monitoring electrophysiological function during ischemic challenge. In addition to the recording platform, two perfusion chambers and a cranial window device were replicated with sub-millimeter precision. The ability to repeatedly modify the design of each device with minimal effort and low turn-around time is helpful for oft-unpredictable experimental conditions. Results obtained from validation studies using both the cortical recording platform and perfusion chamber did not vary from previous results using traditional hand-fabricated or commercially available devices. Combined with computer-aided design, rapid prototyping is an excellent alternative for developing and fabricating custom devices for neuroscience research. PMID:18565590

Tek, Peter; Chiganos, Terry C; Mohammed, Javeed Shaikh; Eddington, David T; Fall, Christopher P; Ifft, Peter; Rousche, Patrick J

2008-07-30

492

Terrestrial Mobile Mapping: photogrammetric simulator  

NASA Astrophysics Data System (ADS)

Nowadays many types of sensors are used for terrestrial mobile mapping (TMM): IMU, odometers, GNSS, cameras, etc., and it is essential to understand how these sensors can improve the solution in terms of precision, accuracy and reliability. TMM issues are characterized by many variables: vehicle trajectory, the height of the buildings and the distance between them, traffic conditions, the presence or absence of trees, the level of illumination, etc. The aim of this study is to determine how photogrammetric measurements can improve the quality of TMM solution at least concerning magnitude and error propagation when there is no GNSS signal (for example in an urban canyon). Another purpose of the study was to determine the most suitable design project for a specific relief in order to obtain the best possible photogrammetric results. By analyzing the error propagation in the various components of relative orientation along the trajectory and considering a sequence of images characterized by an overlap varying between 60 to 90% and the same number of tie points, results were obtained which confirmed the reliability of the data produced by the simulator. These results are shown in this paper.

Taglioretti, C.; Manzino, A. M.

2014-08-01

493

Social Mobility and Educational Financing  

Microsoft Academic Search

This paper studies the relation between education financing and so- cial mobility in a setting of successive generations with heterogeneous individuals. Agents differ in two dimensions: talent and family back- ground. Families accumulate self-confidence through their mobility trajectories. The total amount of self-confidence determines intergen- erational mobility which in turn determines income distributions and educational status distributions. I show that

Ahmed Tritah

494

Mobile Technology in Educational Services  

Microsoft Academic Search

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

Jueming Chen

2005-01-01

495

BUILDING MOBILE EXPERIENCES Frank Bentley  

E-print Network

of teaching mobile apps class at MIT ! Strong believer in user-inspired innovation ! Have brought several new ! iPhone App Store ! Android Marketplace ! Windows Marketplace for Mobile ! Ability to get your app out, even as a researcher #12;Question? ! What are some of your favorite mobile apps? #12;What

Glinz, Martin

496

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

497

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

498

Multiversion Reconciliation for Mobile Databases  

Microsoft Academic Search

As mobile computing devices become more and more popular, mobile databases have started gain- ing popularity. An important feature of these database systems is their ability to allow optimistic replication of data by permitting disconnected mobile devices to perform local updates on replicated data. The fundamental problem in this approach is the reconciliation problem, i.e. the problem of serializing potentially

Shirish Hemant Phatak; B. R. Badrinath

1999-01-01

499

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

500

A Trusted Mobile Phone Prototype  

Microsoft Academic Search

Due to the increasing security demands in mobile devices, the Trusted Computing Group (TCG) formed a dedicated Mobile Phone Working Group (MPWG) to address these security needs. MPWG recently released a Trusted Mobile Phone Reference Architecture (TCG-MPRA) specification that integrates well-known security concepts (TPM, isolation, Integrity Measurement and Verification (IMV), etc.) from the trusted\\

O. Aciicmez; A. Latifi; J.-P. Seifert; Xinwen Zhang

2008-01-01