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https://www.readbyqxmd.com/read/28640992/crystalline-organic-pigment-based-field-effect-transistors
#1
Haichang Zhang, Ruonan Deng, Jing Wang, Xiang Li, Yu-Ming Chen, Kewei Liu, Clinton J Taubert, Stephen Z D Cheng, Yu Zhu
Three conjugated pigment molecules with fused hydrogen bonds, 3,7-diphenylpyrrolo[2,3-f]indole-2,6(1H,5H)-dione (BDP), (E)-6,6'-dibromo-[3,3'-biindolinylidene]-2,2'-dione (IIDG), and 3,6-di(thiophen-2-yl)-2,5-dihydropyrrolo-[3,4-c]pyrrole-1,4-dione (TDPP), were studied in this work. The insoluble pigment molecules were functionalized with tert-butoxylcarbonyl (t-Boc) groups to form soluble pigment precursors (BDP-Boc, IIDG-Boc, and TDPP-Boc) with latent hydrogen bonding. The single crystals of soluble pigment precursors were obtained...
June 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28640594/biomedical-diagnostics-enabled-by-integrated-organic-and-printed-electronics
#2
Termeh Ahmadraji, Laura Gonzalez-Macia, Tapio Ritvonen, Andreas Willert, Saara Tuurala, Satu Ylimaula, David Donaghy, Mika Suhonen, Dave Smart, Vitaly Efremov, Aoife Morrin, Reinhard R Baumann, Munira Raja, Antti Kemppainen, Anthony J Killard
Organic and printed electronics integration has the potential to revolutionise many technologies, including biomedical diag-nostics. This work demonstrates the successful integration of multiple printed electronic functionalities into a single device capable of the measurement of hydrogen peroxide, and total cholesterol. The single-use device employed printed electrochemical sen-sors for hydrogen peroxide electroreduction integrated with printed electrochromic display and battery. The system was driven by a conventional electronic circuit designed to illustrate the complete integration of silicon ICs via pick and place, or using organic electronic circuits...
June 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28636475/surgical-aortic-valve-replacement-for-stenosis-of-tavi-device
#3
M Sooknunden, M A Radermecker, J O Defraigne, Vincent Tchana-Sato
We here report the case of a stenosis of the CoreValve(®) system due to reduced mobility of prosthesis cusps for which a surgical replacement of the aortic valve was proposed. The exact mechanism leading to this impaired mobility of the leaflets is yet to be determined. We also underline the fact a transcatheter aortic valve implantation (TAVI) device can be replaced by a surgical replacement without excessive operative risks despite the patient being initially considered as high-risk.
March 1, 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28633318/evaluation-of-oral-fluid-as-a-specimen-for-duid
#4
Allison M Veitenheimer, Jarrad R Wagner
Drugged driving has become more prevalent than drunk driving and is quickly gaining national attention due to increased prescription drug abuse and recent cannabis legalization. Unlike alcohol, police officers do not generally have access to approved devices to screen for drugs at the roadside. Onsite drug screening devices do exist and are used in other countries, but have not garnered widespread approval for use in the United States in driving under the influence of drugs (DUID) cases. One reason for this is that the devices are designed to test oral fluid, which is not a commonly accepted specimen for DUID...
June 13, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28632552/comparative-study-of-c-arms-for-intraoperative-3-dimensional-imaging-and-navigation-in-minimally-invasive-spine-surgery-part-ii-radiation-exposure
#5
Jan-Helge Klingler, Ronen Sircar, Christian Scheiwe, Evangelos Kogias, Marie T Krüger, Christoph Scholz, Ulrich Hubbe
STUDY DESIGN: A radiation exposure study in vitro. OBJECTIVE: This study aimed to compare the radiation exposure of 2 different 3-dimensional (3D) C-arm devices on an anthropomorphic phantom. SUMMARY OF BACKGROUND DATA: Minimally invasive pedicle screw placement requires intraoperative imaging techniques for visualization of the unexposed spine. Mobile 3D C-arms compose a 3D image data set out of multiple successive fluoroscopic images. METHODS: We compared the 3D C-arm devices Siremobil Iso-C 3D (Siemens Sector Healthcare, Erlangen, Germany) and Vision FD Vario 3D (Ziehm Imaging, Nuremberg, Germany) regarding their radiation exposure...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28632551/comparative-study-of-c-arms-for-intraoperative-3-dimensional-imaging-and-navigation-in-minimally-invasive-spine-surgery-part-i-applicability-and-image-quality
#6
Jan-Helge Klingler, Ronen Sircar, Christian Scheiwe, Evangelos Kogias, Florian Volz, Marie T Krüger, Ulrich Hubbe
STUDY DESIGN: This was a retrospective analysis. OBJECTIVE: This study compares 2 different 3-dimensional (3D) C-arm devices for intraoperative imaging and navigation with regard to clinical applicability and image quality. SUMMARY OF BACKGROUND DATA: Minimally invasive spine surgery requires intraoperative imaging techniques to adequately visualize the unexposed spine. For this purpose, mobile 3D C-arms became available along with the evolution of intraoperative navigation techniques...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28632188/smartphone-based-food-diagnostic-technologies-a-review
#7
REVIEW
Giovanni Rateni, Paolo Dario, Filippo Cavallo
A new generation of mobile sensing approaches offers significant advantages over traditional platforms in terms of test speed, control, low cost, ease-of-operation, and data management, and requires minimal equipment and user involvement. The marriage of novel sensing technologies with cellphones enables the development of powerful lab-on-smartphone platforms for many important applications including medical diagnosis, environmental monitoring, and food safety analysis. This paper reviews the recent advancements and developments in the field of smartphone-based food diagnostic technologies, with an emphasis on custom modules to enhance smartphone sensing capabilities...
June 20, 2017: Sensors
https://www.readbyqxmd.com/read/28631466/enhancing-the-performance-of-polymer-solar-cells-by-using-donor-polymers-carrying-discretely-distributed-side-chains
#8
Xue Gong, Guangwu Li, Yang Wu, Jicheng Zhang, Shiyu Feng, Yahui Liu, Cuihong Li, Wei Ma, Zhishan Bo
Three-component conjugated polymers P1-1 and P1-2 were prepared by one-pot Stille cross-coupling reaction and applied for polymer solar cell (PSCs). The two-component polymer P1-0 only comprises 5-flouro-6-alkyloxybenzothiadiazole (AFBT) acceptor unit and thiophene donor unit; while the three-component polymers P1-1 and P1-2 contain 10% and 20% 5,6-difluorobenzothiadiazole (DFBT), respectively, as the third component. The incorporation of the third component, 5,6-difluorobenzothiadiazole, makes the side chains discretely distributed in the polymer backbones, which can enhance the π-π stacking of polymers in film, markedly increase the hole mobility of active layers, and improve the power conversion efficiency (PCE) of devices...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28631297/an-augmented-reality-tool-for-learning-spatial-anatomy-on-mobile-devices
#9
Nishant Jain, Patricia Youngblood, Matthew Hasel, Sakti Srivastava
INTRODUCTION: Augmented Realty (AR) offers a novel method of blending virtual and real anatomy for intuitive spatial learning. Our first aim in the study was to create a prototype AR tool for mobile devices. Our second aim was to complete a technical evaluation of our prototype AR tool focused on measuring the system's ability to accurately render digital content in the real world. MATERIALS AND METHODS: We imported Computed Tomography (CT) data derived virtual surface models into a 3D Unity engine environment and implemented an AR algorithm to display these on mobile devices...
June 20, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28630901/stable-anchoring-chemistry-for-room-temperature-charge-transport-through-graphite-molecule-contacts
#10
Alexander V Rudnev, Veerabhadrarao Kaliginedi, Andrea Droghetti, Hiroaki Ozawa, Akiyoshi Kuzume, Masa-Aki Haga, Peter Broekmann, Ivan Rungger
An open challenge for single-molecule electronics is to find stable contacts at room temperature with a well-defined conductance. Common coinage metal electrodes pose fabrication and operational problems due to the high mobility of the surface atoms. We demonstrate how molecules covalently grafted onto mechanically robust graphite/graphene substrates overcome these limitations. To this aim, we explore the effect of the anchoring group chemistry on the charge transport properties of graphite-molecule contacts by means of the scanning tunneling microscopy break-junction technique and ab initio simulations...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28630435/in-situ-electrical-and-thermal-monitoring-of-printed-electronics-by-two-photon-mapping
#11
Francesco Pastorelli, Nicolò Accanto, Mikkel Jørgensen, Niek F van Hulst, Frederik C Krebs
Printed electronics is emerging as a new, large scale and cost effective technology that will be disruptive in fields such as energy harvesting, consumer electronics and medical sensors. The performance of printed electronic devices relies principally on the carrier mobility and molecular packing of the polymer semiconductor material. Unfortunately, the analysis of such materials is generally performed with destructive techniques, which are hard to make compatible with in situ measurements, and pose a great obstacle for the mass production of printed electronics devices...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630037/a-mobile-app-for-the-self-management-of-type-1-diabetes-among-adolescents-a-randomized-controlled-trial
#12
Shivani Goyal, Caitlin A Nunn, Michael Rotondi, Amy B Couperthwaite, Sally Reiser, Angelo Simone, Debra K Katzman, Joseph A Cafazzo, Mark R Palmert
BACKGROUND: While optimal blood glucose control is known to reduce the long-term complications associated with type 1 diabetes mellitus, adolescents often struggle to achieve their blood glucose targets. However, their strong propensity toward technology presents a unique opportunity for the delivery of novel self-management interventions. To support type 1 diabetes self-management in this population, we developed the diabetes self-management app bant, which included wireless blood glucose reading transfer, out-of-range blood glucose trend alerts, coaching around out-of-range trend causes and fixes, and a point-based incentive system...
June 19, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28629413/progressive-disability-in-elderly-population-among-tribals-of-telangana-a-cross-sectional-study
#13
Ajitha Katta, Anil Kumar Indira Krishna, Bagavandas M, Tomofumi Anegawa, Suresh Munuswamy
BACKGROUND: The tribal population of Telangana, India, lives in remote and difficult conditions. This study was carried out to find out estimate, the prevalence and progression of disability in elderly population among tribals of Khammam District, Telangana state, India. METHODS: A population based cross sectional survey was conducted in villages of Tribal Sub Plan area. Elderly people who are 60 years or older were chosen with a two stage sampling procedure: (1) probability proportion to size was used to select clusters and (2) in each selected cluster households were selected by systematic random sampling...
June 19, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28629374/multi-purpose-ecg-telemetry-system
#14
Mohamed Marouf, Goran Vukomanovic, Lazar Saranovac, Miroslav Bozic
BACKGROUND: The Electrocardiogram ECG is one of the most important non-invasive tools for cardiac diseases diagnosis. Taking advantage of the developed telecommunication infrastructure, several approaches that address the development of telemetry cardiac devices were introduced recently. Telemetry ECG devices allow easy and fast ECG monitoring of patients with suspected cardiac issues. Choosing the right device with the desired working mode, signal quality, and the device cost are still the main obstacles to massive usage of these devices...
June 19, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28629208/breaking-through-the-multi-mesa-channel-width-limited-of-normally-off-gan-hemts-through-modulation-of-the-via-hole-length
#15
Cheng-Yen Chien, Wen-Hsin Wu, Yao-Hong You, Jun-Huei Lin, Chia-Yu Lee, Wen-Ching Hsu, Chieh-Hsiung Kuan, Ray-Ming Lin
We present new normally off GaN high-electron-mobility transistors (HEMTs) that overcome the typical limitations in multi-mesa-channel (MMC) width through modulation of the via-hole-length to regulate the charge neutrality screen effect. We have prepared enhancement-mode (E-mode) GaN HEMTs having widths of up to 300 nm, based on an enhanced surface pinning effect. E-mode GaN HEMTs having MMC structures and widths as well as via-hole-lengths of 100 nm/2 μm and 300 nm/6 μm, respectively, exhibited positive threshold voltages (V th) of 0...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28629178/active2gether-a-personalized-m-health-intervention-to-encourage-physical-activity
#16
Michel C A Klein, Adnan Manzoor, Julia S Mollee
Lack of physical activity is an increasingly important health risk. Modern mobile technology, such as smartphones and digital measurement devices, provides new opportunities to tackle physical inactivity. This paper describes the design of a system that aims to encourage young adults to be more physically active. The system monitors the user's behavior, uses social comparison and provides tailored and personalized feedback based on intelligent reasoning mechanisms. As the name suggests, social processes play an important role in the Active2Gether system...
June 19, 2017: Sensors
https://www.readbyqxmd.com/read/28628230/thread-like-cmos-logic-circuits-enabled-by-reel-processed-single-walled-carbon-nanotube-transistors-via-selective-doping
#17
Jae Sang Heo, Taehoon Kim, Seok-Gyu Ban, Daesik Kim, Jun Ho Lee, Jesse S Jur, Myung-Gil Kim, Yong-Hoon Kim, Yongtaek Hong, Sung Kyu Park
The realization of large-area electronics with full integration of 1D thread-like devices may open up a new era for ultraflexible and human adaptable electronic systems because of their potential advantages in demonstrating scalable complex circuitry by a simply integrated weaving technology. More importantly, the thread-like fiber electronic devices can be achieved using a simple reel-to-reel process, which is strongly required for low-cost and scalable manufacturing technology. Here, high-performance reel-processed complementary metal-oxide-semiconductor (CMOS) integrated circuits are reported on 1D fiber substrates by using selectively chemical-doped single-walled carbon nanotube (SWCNT) transistors...
June 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28627913/effect-of-attentional-retraining-on-cognition-craving-and-smoking-in-african-american-smokers
#18
Cendrine D Robinson, Christine Muench, Emily Brede, Romano Endrighi, Edwin H Szeto, Joanna R Sells, John P Lammers, Kolawole S Okuyemi, Andrew J Waters
African American cigarette smokers have lower rates of cessation than Whites and live in communities with a higher number of tobacco advertisements. Exposure to smoking cues may promote smoking and undermine cessation. It may be possible to reduce attention to smoking cues ("attentional bias"). In this study, we investigated the effect of attentional retraining (AR) on attentional bias and smoking in African American smokers. Nontreatment- seeking African American smokers (N = 64) were randomly assigned to an AR or control condition...
June 19, 2017: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/28627894/surface-functionalization-of-black-phosphorus-via-potassium-towards-high-performance-complementary-devices
#19
Cheng Han, Zehua Hu, Lidia C Gomes, Yang Bao, Alexandra Carvalho, Sherman Jun Rong Tan, Bo Lei, Du Xiang, Jing Wu, Dianyu Qi, Li Wang, Fengwei Huo, Wei Huang, Kian Ping Loh, Wei Chen
Two-dimensional black phosphorus configured field-effect transistor devices generally show a hole-dominated ambipolar transport characteristic, thereby limiting its applications in complementary electronics. Herein, we demonstrate an effective surface functionalization scheme on few-layer black phosphorus, through in situ surface modification with potassium, with a view towards high performance complementary device applications. Potassium induces a giant electron doping effect on black phosphorus along with a clear bandgap reduction, which is further corroborated by in situ photoelectron spectroscopy characterizations...
June 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28627262/a-longitudinal-study-investigating-cervical-changes-during-labor-using-a-wireless-ultrasound-device
#20
Juyoung Kim, Sukyoung Kim, Seungjoo Jeon, Sunyoung Jung
PURPOSE: Cervical assessment during digital vaginal examination (DVE) includes assessing cervical dilatation, effacement, position, and consistency. Only cervical dilatation during labor has been previously researched. We investigated cervical changes, including cervical dilatation and effacement, using a wireless ultrasound device. MATERIALS AND METHODS: This was a longitudinal study investigating cervical changes during labor using a wireless ultrasound device...
June 19, 2017: Journal of Maternal-fetal & Neonatal Medicine
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