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https://www.readbyqxmd.com/read/28100441/assessing-the-efficacy-of-an-app-based-method-of-family-planning-the-dot-study-protocol
#1
Rebecca G Simmons, Dominick C Shattuck, Victoria H Jennings
BACKGROUND: Some 222 million women worldwide have unmet needs for contraception; they want to avoid pregnancy, but are not using a contraceptive method, primarily because of concerns about side effects associated with most available methods. Expanding contraceptive options-particularly fertility awareness options that provide women with information about which days during their menstrual cycles they are likely to become pregnant if they have unprotected intercourse-has the potential to reduce unmet need...
January 18, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28100050/charge-carrier-hopping-dynamics-in-homogeneously-broadened-pbs-quantum-dot-solids
#2
Rachel H Gilmore, Elizabeth M Y Lee, Mark C Weidman, Adam P Willard, William A Tisdale
Energetic disorder in quantum dot solids adversely impacts charge carrier transport in quantum dot solar cells and electronic devices. Here, we use ultrafast transient absorption spectroscopy to show that homogeneously broadened PbS quantum dot arrays (σhom(2):σinh(2)>19:1, σinh/kBT<0.4) can be realized if quantum dot batches are sufficiently monodisperse (δ ≲ 3.3%). Homogeneous linewidth is found to be an inverse function of quantum dot size, monotonically increasing from ~25 meV for the largest quantum dots (5...
January 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28099237/lower-limb-muscular-strength-balance-and-mobility-levels-in-adults-following-severe-thermal-burn-injuries
#3
Mohammed T A Omar, Amal M Abd El Baky, Anwar A Ebid
Severe burn injuries are associated with hypermetabolic response and increased catabolism. These lead to a vast loss of muscle mass and reduced muscle strength and function. Therefore, the aim of this study is to determine the impact of severe burn injuries on lower-limb muscular strength, balance, and mobility level in adults. Forty burned adults with burned TBSA (burned TBSA) ≥40% participated in this study. The peak torque and total work of quadriceps and knee flexors were calculated at 150°/sec using Biodex isokinetic dynamometer...
January 10, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28099030/ultrafast-broadband-photodetectors-based-on-three-dimensional-dirac-semimetal-cd3as2
#4
Qinsheng Wang, Cai-Zhen Li, Shaofeng Ge, Jin-Guang Li, Wei Lu, Jiawei Lai, Xuefeng Liu, Junchao Ma, Dapeng Yu, Zhi-Min Liao, Dong Sun
Photodetection with extreme performances in terms of ultrafast response time, broad detection wavelength range, and high sensitivity has wide range of optoelectronic and photonic applications, such as optical communications, interconnects, imaging and remote sensing. Graphene, a typical two-dimensional Dirac semimetal, has shown excellent potential toward high performance photodetector with high operation speed, broadband response and efficient carrier multiplications benefiting from its linear dispersion band structure with high carrier mobility and zero bandgap...
January 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28098772/a-non-intrusive-cyber-physical-social-sensing-solution-to-people-behavior-tracking-mechanism-prototype-and-field-experiments
#5
Yunjian Jia, Zhenyu Zhou, Fei Chen, Peng Duan, Zhen Guo, Shahid Mumtaz
Tracking people's behaviors is a main category of cyber physical social sensing (CPSS)-related people-centric applications. Most tracking methods utilize camera networks or sensors built into mobile devices such as global positioning system (GPS) and Bluetooth. In this article, we propose a non-intrusive wireless fidelity (Wi-Fi)-based tracking method. To show the feasibility, we target tracking people's access behaviors in Wi-Fi networks, which has drawn a lot of interest from the academy and industry recently...
January 13, 2017: Sensors
https://www.readbyqxmd.com/read/28097627/adherence-with-physical-activity-monitoring-wearable-devices-in-a-community-based-population-observations-from-the-washington-d-c-cardiovascular-health-and-needs-assessment
#6
Leah R Yingling, Valerie Mitchell, Colby R Ayers, Marlene Peters-Lawrence, Gwenyth R Wallen, Alyssa T Brooks, James F Troendle, Joel Adu-Brimpong, Samantha Thomas, JaWanna Henry, Johnetta N Saygbe, Dana M Sampson, Allan A Johnson, Avis P Graham, Lennox A Graham, Kenneth L Wiley, Tiffany Powell-Wiley
Wearable mobile health (mHealth) technologies offer approaches for targeting physical activity (PA) in resource-limited, community-based interventions. We sought to explore user characteristics of PA tracking, wearable technology among a community-based population within a health and needs assessment. In 2014-2015, we conducted the Washington, D.C., Cardiovascular Health and Needs Assessment in predominantly African-American churches among communities with higher obesity rates and lower household incomes. Participants received a mHealth PA monitor and wirelessly uploaded PA data weekly to church data collection hubs...
January 17, 2017: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/28097459/are-intensive-data-collection-methods-in-pain-research-feasible-in-those-with-physical-disability-a-study-in-persons-with-chronic-pain-and-spinal-cord-injury
#7
A L Kratz, C Z Kalpakjian, R A Hanks
PURPOSE: Intensive repeated measures data collection procedures, such as ecological momentary assessment (EMA) and end-of-day (EOD) diaries, are becoming more prominent in pain research. Existing data on the feasibility of such methods is encouraging; however, almost nothing is known about feasibility in clinical populations with significant physical disabilities. Research methodology feasibility is crucial to the inclusion of individuals with physical disability in pain research given the high prevalence and impact of pain in these populations...
January 17, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28094502/highly-efficient-full-color-thermally-activated-delayed-fluorescent-organic-light-emitting-diodes-extremely-low-efficiency-roll-off-utilizing-a-host-with-small-singlet-triplet-splitting
#8
Dongdong Zhang, Chongguang Zhao, Yunge Zhang, Xiaozeng Song, Pengcheng Wei, Minghan Cai, Lian Duan
Numerous efforts have been devoted to boost the efficiency of thermally activated delayed fluorescence (TADF) devices; however, strategies to suppress the device efficiency roll-off are still in urgent need. Here, a general and effective approach to suppress the efficiency roll-off of TADF devices is proposed, that is utilizing TADF materials as the hosts for TADF emitters. Bearing small singlet-triplet splitting (ΔEST) with donor and acceptor units, TADF materials as the hosts possess the potential to achieve matched frontier energy levels with the adjacent transporting layers, facilitating balanced charge injection, as well as bipolar charge transport mobilities, beneficial to the balanced charges transportation...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094242/wrinkle-free-graphene-electrodes-in-zinc-tin-oxide-thin-film-transistors-for-large-area-applications
#9
Se-Hee Lee, Jae-Hee Kim, Byeong-Ju Park, Jozeph Park, Hyun-Suk Kim, Soon-Gil Yoon
Wrinkle-free graphene was used to form the source-drain electrodes in thin film transistors based on a zinc tin oxide (ZTO) semiconductor. A 10 nm thick titanium adhesion layer was applied prior to transferring a conductive graphene film on top of it by chemical detachment. The formation of an interlayer oxide between titanium and graphene allows the achievement of uniform surface roughness over the entire substrate area. The resulting devices were thermally treated in ambient air, and a substantial decrease in field effect mobility is observed with increasing annealing temperature...
February 17, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28092566/wake-up-exoskeleton-to-assist-children-with-cerebral-palsy-design-and-preliminary-evaluation-in-level-walking
#10
Fabrizio Patane, Stefano Rossi, Fausto Del Sette, Juri Taborri, Paolo Cappa
This paper presents the modular design and control of a novel compliant lower limb multi-joint exoskeleton for the rehabilitation of ankle knee mobility and locomotion of pediatric patients with neurological diseases, such as Cerebral Palsy (CP). The device consists of an untethered powered knee-ankle-foot orthosis (KAFO), addressed as WAKE-up (Wearable Ankle Knee Exoskeleton), characterized by a position control and capable of operating synchronously and synergistically with the human musculoskeletal system...
January 11, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28092549/learning-short-binary-codes-for-large-scale-image-retrieval
#11
Li Liu, Mengyang Yu, Ling Shao
Large-scale visual information retrieval has become an active research area in this big data era. Recently, hashing/ binary coding algorithms prove to be effective for scalable retrieval applications. Most existing hashing methods require relatively long binary codes (i.e., over hundreds of bits, sometimes even thousands of bits) to achieve reasonable retrieval accuracies. However, for some realistic and unique applications such as on wearable or mobile devices, only short binary codes can be used for efficient image retrieval due to the limitation of computational resources or bandwidth on these devices...
January 11, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28092424/continuous-films-of-self-assembled-graphene-quantum-dots-for-n-type-doping-of-graphene-by-uv-triggered-charge-transfer
#12
Myung Jin Park, Yuna Kim, Youngsoo Kim, Byung Hee Hong
The demands to examine components serving as one of the active layers in heterostructures of 2D materials have been recently increasing. Nanomaterials synthesized from a solution process and their self-assembly can provide a promising route to build a new type of mixed dimensional heterostructures, and several methodologies have been reported previously to construct 2D assemblies from colloidal nanostructures in solution. Graphene quantum dots (GQDs), receiving much interest due to the tunable optical band gap and the capability of chemical functionalization, are considered as emerging nanomaterials for various optoelectronic and biological applications...
January 16, 2017: Small
https://www.readbyqxmd.com/read/28092273/in-vivo-testing-of-extracorporeal-membrane-ventilators-ila-activve%C3%A2-vs-prototype-i-lung%C3%A2
#13
Sabine Kischkel, Stefan Bergt, Beate Brock, Johan von Grönheim, Anne Herbst, Marc-Jonas Epping, Georg Matheis, Esther Novosel, Joerg Schneider, Philipp Warnke, Andreas Podbielski, Jan P Roesner, Peter I Lelkes, Brigitte Vollmar
A side-by-side comparison of the decarboxylation efficacy of two pump-driven veno-venous extracorporeal lung assist devices, i.e. a first prototype of the new miniaturized ambulatory extracorporeal membrane ventilator, I-lung® versus the commercial system iLA-activve® over a period of 72 hours in a large animal model.Fifteen German Landrace pigs were anesthetized and underwent mechanical hypoventilation to induce severe hypercapnia. Decarboxylation was accomplished by either the I-lung® or the iLA-activve® via a double lumen catheter in the jugular vein...
January 4, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28088226/use-of-an-intraoperative-navigation-system-for-retrieving-a-broken-dental-instrument-in-the-mandible-a-case-report
#14
Shintaro Sukegawa, Takahiro Kanno, Akane Shibata, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Kyosuke Sakaida, Yoshihiko Furuki
BACKGROUND: A fracture of root canal instruments, with a fractured piece protruding beyond the apex, is a troublesome incident during an endodontic treatment. Locating and retrieving them represents a challenge to maxillofacial surgeons because it is difficult to access due to the proximity between the foreign body and vital structures. Although safe and accurate for surgery, radiographs and electromagnetic devices do not provide a precise three-dimensional position. In contrast, computer-aided navigation provides a correlation between preoperatively collected data and intraoperatively encountered anatomy...
January 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28086828/subjective-and-objective-assessment-of-physical-activity-in-multiple-sclerosis-and-their-relation-to-health-related-quality-of-life
#15
Theresa Krüger, Janina R Behrens, Anuschka Grobelny, Karen Otte, Sebastian Mansow-Model, Bastian Kayser, Judith Bellmann-Strobl, Alexander U Brandt, Friedemann Paul, Tanja Schmitz-Hübsch
BACKGROUND: Physical activity (PA) is frequently restricted in people with multiple sclerosis (PwMS) and aiming to enhance PA is considered beneficial in this population. We here aimed to explore two standard methods (subjective plus objective) to assess PA reduction in PwMS and to describe the relation of PA to health-related quality of life (hrQoL). METHODS: PA was objectively measured over a 7-day period in 26 PwMS (EDSS 1.5-6.0) and 30 matched healthy controls (HC) using SenseWear mini® armband (SWAmini) and reported as step count, mean total and activity related energy expenditure (EE) as well as time spent in PA of different intensities...
January 13, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28086793/methicillin-resistance-and-virulence-genes-in-invasive-and-nasal-staphylococcus-epidermidis-isolates-from-neonates
#16
Vivian Carolina Salgueiro, Natalia Lopes Pontes Iorio, Marcelle Cristina Ferreira, Raiane Cardoso Chamon, Kátia Regina Netto Dos Santos
BACKGROUND: Staphylococcus epidermidis is an opportunistic pathogen involved in hospital-acquired infections, particularly in those related to medical devices. This study characterized 50 genetically unrelated S. epidermidis isolates from bloodstream infections (BSIs, n = 31) and nares (n = 19) of neonates in relation to staphylococcal chromosomal cassette mec (SCCmec) type, biofilm production and associated genes, and the arginine catabolic mobile elements (ACME), in order to detect virulence factors that could discriminate a potential invasiveness isolate or predict an increasing pathogenicity...
January 13, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28081433/what-s-the-law-got-to-do-with-it-legislation-regarding-in-vehicle-technology-use-and-its-impact-on-driver-distraction
#17
Katie J Parnell, Neville A Stanton, Katherine L Plant
Legislation in the road transport domain aims to control safety on the roads. Despite this, a critical issue affecting road safety is that of driver distraction. Although poorly defined, distraction is a significant road safety issue which, in part, is caused by the prevalence of technology within vehicles. Legislation surrounding the use of in-vehicle technologies are explored in this paper from a socio-technical system perspective. This reveals the wider context of the road transport system operating under the current laws using an Accimap analysis...
January 9, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28080025/enabling-energy-efficiency-and-polarity-control-in-germanium-nanowire-transistors-by-individually-gated-nanojunctions
#18
Jens Trommer, André Heinzig, Uwe Mühle, Markus Löffler, Annett Winzer, Paul M Jordan, Jürgen Beister, Tim Baldauf, Marion Geidel, Barbara Adolphi, Ehrenfried Zschech, Thomas Mikolajick, Walter M Weber
Germanium is a promising material for future very large scale integration transistors, due to its superior hole mobility. However, germanium-based devices typically suffer from high reverse junction leakage due to the low band-gap energy of 0.66 eV and therefore are characterized by high static power dissipation. In this paper, we experimentally demonstrate a solution to suppress the off-state leakage in germanium nanowire Schottky barrier transistors. Thereto, a device layout with two independent gates is used to induce an additional energy barrier to the channel that blocks the undesired carrier type...
January 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28079360/solution-processed-organic-thin-film-transistor-arrays-with-assistance-of-laser-ablation
#19
Huihuang Yang, Cihai Chen, Guocheng Zhang, Shuqiong Lan, Huipeng Chen, Tailiang Guo
A key step toward commercialization of OTFT is to manufacture large-area OTFT arrays with desired uniform device performance. In this work, solution processed organic thin film transistor (OTFT) arrays were fabricated with assistance of laser ablation. The source-drain electrodes and the whole devices were patterned by precise control of laser intensity and process path. A careful selection of laser processing parameters is key to obtain high performance OTFT arrays. Eventually, the OTFT arrays on silicon wafer and ITO glass exhibited uniform electrical characteristics with the mean mobility of 0...
January 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28079207/hysteresis-phenomena-in-perovskite-solar-cells-the-many-and-varied-effects-of-ionic-accumulation
#20
Daniel A Jacobs, Yiliang Wu, Heping Shen, Chog Barugkin, Fiona J Beck, Thomas P White, Klaus Weber, Kylie R Catchpole
The issue of hysteresis in perovskite solar cells has now been convincingly linked to the presence of mobile ions within the perovskite layer. Here we test the limits of the ionic theory by attempting to account for a number of exotic characterization results using a detailed numerical device model that incorporates ionic charge accumulation at the perovskite interfaces. Our experimental observations include a temporary enhancement in open-circuit voltage following prolonged periods of negative bias, dramatically S-shaped current-voltage sweeps, decreased current extraction following positive biasing or "inverted hysteresis", and non-monotonic transient behaviours in the dark and the light...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
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