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https://www.readbyqxmd.com/read/28347129/bi-layer-channel-azo-zno-thin-film-transistors-fabricated-by-atomic-layer-deposition-technique
#1
Huijin Li, Dedong Han, Liqiao Liu, Junchen Dong, Guodong Cui, Shengdong Zhang, Xing Zhang, Yi Wang
This letter demonstrates bi-layer channel Al-doped ZnO/ZnO thin film transistors (AZO/ZnO TFTs) via atomic layer deposition process at a relatively low temperature. The effects of annealing in oxygen atmosphere at different temperatures have also been investigated. The ALD bi-layer channel AZO/ZnO TFTs annealed in dry O2 at 300 °C exhibit a low leakage current of 2.5 × 10(-13)A, I on/I off ratio of 1.4 × 10(7), subthreshold swing (SS) of 0.23 V/decade, and high transmittance. The enhanced performance obtained from the bi-layer channel AZO/ZnO TFT devices is explained by the inserted AZO front channel layer playing the role of the mobility booster...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28346963/point-of-care-testing-in-neurosurgery
#2
Christopher Beynon, Lars Wessels, Andreas W Unterberg
Coagulation disorders can have a major impact on the outcome of neurosurgical patients. The central nervous system is located within the closed space of the skull, and therefore, intracranial hemorrhage can lead to intracranial hypertension. Acute brain injury has been associated with alterations of various hemostatic parameters. Point-of-care (POC) techniques such as rotational thromboelastometry are able to identify markers of coagulopathy which are not reflected by standard assessment of hemostasis (e.g...
March 27, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28346863/lymph-node-dissection-using-bipolar-vessel-sealing-device-during-reduced-port-laparoscopic-distal-gastrectomy-for-gastric-cancer-result-of-a-pilot-study-from-a-single-institute
#3
Chang Min Lee, Da Won Park, Sungsoo Park, Jong-Han Kim, Seong-Heum Park, Chong-Suk Kim
INTRODUCTION: The electrothermal bipolar vessel-sealing device (BVSD) is known to supply a strong vessel-sealing power. However, only few studies have reported lymph node dissection (LND) using only BVSD during laparoscopic surgery for gastric cancer. The purpose of this study was to investigate the feasibility of LND using BVSD during reduced port laparoscopic distal gastrectomy for gastric cancer. METHODS: From May 2015, patients in whom three- or single-port laparoscopic distal gastrectomy had been engaged for gastric cancer were enrolled in this study...
March 27, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28346826/imaging-successive-intermediate-states-of-the-on-surface-ullmann-reaction-on-cu-111-role-of-the-metal-coordination
#4
Sören Zint, Daniel Ebeling, Tobias Schlöder, Sebastian Ahles, Doreen Mollenhauer, Hermann A Wegner, Andre Schirmeisen
The in-depth knowledge about on-surface reaction mechanisms is crucial for the tailor-made design of covalently bonded organic frameworks, for applications such as nanoelectronic or -optical devices. Latest developments in atomic force microscopy, which rely on functionalizing the tip with single CO molecules at low temperatures allow to image molecular systems with submolecular resolution. Here, we are using this technique to study the complete reaction pathway of the on-surface Ullmann-type coupling between bromotriphenylene molecules on a Cu(111) surface...
March 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28346729/comparison-of-the-safety-of-electrotome-harmonic-scalpel-and-ligasure-for-management-of-thyroid-surgery
#5
Xiaodong Yang, Jian Cao, Yichao Yan, Fangfang Liu, Tao Li, Long Han, Chunxiang Ye, Shuying Zheng, Shan Wang, Yingjiang Ye, Kewei Jiang
BACKGROUND: Energy-based surgical devices, including electrotome, the Harmonic scalpel, and LigaSure, have been widely applied in thyroid surgery, although a comparison of their safety and efficacy has not been reported yet. In this study, we investigated the feasibility of using hemostatic energy-based surgical devices during thyroid surgery in a canine model. METHODS: Twenty-four beagle dogs were randomly divided into the following groups: electrotome (30 kW), electrotome (15 kW), the Harmonic scalpel (output level 3), and LigaSure (middle gear)...
March 27, 2017: Head & Neck
https://www.readbyqxmd.com/read/28346653/how-successful-is-the-fitting-of-digital-hearing-aids-implications-for-the-allocation-of-resources-within-national-health-systems
#6
Petros V Vlastarakos, Alastair I Cameron, Thomas P Nikolopoulos
We conducted a retrospective study to determine the success rate of initial fittings in digital hearing aid (DHA) users. We also addressed the implications of national health systems' continuing to provide access to these devices. We identified 1,597 consecutively presenting adults who had undergone a first fitting or a new fitting (i.e., an upgrade from an analogue hearing aid in the first or second ear) of a behind-the-ear DHA during the previous year. We further sought to identify all nominal reprogram appointments that had taken place within 6 months after the first or new fitting; we found 460 such appointments (28...
March 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28346652/treatment-success-with-titratable-thermoplastic-mandibular-advancement-devices-for-obstructive-sleep-apnea-a-comparison-of-patient-characteristics
#7
Tang-Chuan Wang, Yung-An Tsou, Yi-Fan Wu, Chia-Chang Huang, Wesley Wen-Yang Lin, Yu-Fen Li, Michael Yuan-Chien Chen, Chih-Jaan Tai, Ming-Hsui Tsai
A titratable thermoplastic mandibular advancement device (MAD) is clearly an effective treatment option in some patients with obstructive sleep apnea (OSA). Determining which patients may be more likely to respond to treatment with thermoplastic MADs and to adhere to treatment would be of obvious clinical relevance. This was an experimental descriptive study (N = 60). Patients with OSA were instructed to wear a titratable thermoplastic MAD for 3 months. Treatment success was defined as a ≥50% reduction from baseline in the apnea-hypopnea index (AHI) or AHI <10 when wearing MAD...
March 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28346645/facial-trauma-caused-by-electronic-cigarette-explosion
#8
Brian Vaught, Joseph Spellman, Anil Shah, Alexander Stewart, David Mullin
Electronic cigarettes are increasingly popular as a supposed safer alternative to tobacco cigarettes or a smoking cessation tool. Research and debate have focused primarily on possible adverse effects caused by the inhaled aerosol produced by electronic cigarettes and on smoking cessation efficacy. Few reports in the medical literature describe injuries secondary to device malfunction. We present a case of electronic cigarette explosion, with a projectile fracturing the patient's right naso-orbital-ethmoid complex and anterior and posterior frontal sinus tables, with frontal sinus outflow tract involvement...
March 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28346547/a-controllable-water-signal-transistor
#9
Lili Wu, Xiaoyan Zhou, Hangjun Lu, Qing Liang, Jianlong Kou, Fengmin Wu, Jintu Fan
We performed molecular dynamics simulations to study the regulating ability of water chains confined in a Y-shaped nanochannel. It was shown that a signal at the molecular level could be controlled by two other charge-induced signals when the water chains were confined in a Y-shaped nanochannel, demonstrating promising applications as water signal transistors in nanosignal systems. The mechanism of a water signal transistor is similar to a signal logic device. This remarkable ability to control the water signal is attributed to the strong dipole-ordering of the water chains in the nanochannel...
March 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28346339/a-power-planning-algorithm-based-on-rpl-for-ami-wireless-sensor-networks
#10
Marcio L F Miguel, Edgard Jamhour, Marcelo E Pellenz, Manoel C Penna
The advanced metering infrastructure (AMI) is an architecture for two-way communication between electric, gas and water meters and city utilities. The AMI network is a wireless sensor network that provides communication for metering devices in the neighborhood area of the smart grid. Recently, the applicability of a routing protocol for low-power and lossy networks (RPL) has been considered in AMI networks. Some studies in the literature have pointed out problems with RPL, including sub-optimal path selection and instability...
March 25, 2017: Sensors
https://www.readbyqxmd.com/read/28346338/smartfluo-a-method-and-affordable-adapter-to-measure-chlorophyll-a-fluorescence-with-smartphones
#11
Anna Friedrichs, Julia Anke Busch, Hendrik Jan van der Woerd, Oliver Zielinski
In order to increase the monitoring capabilities of inland and coastal waters, there is a need for new, affordable, sensitive and mobile instruments that could be operated semi-automatically in the field. This paper presents a prototype device to measure chlorophyll a fluorescence: the SmartFluo. The device is a combination of a smartphone offering an intuitive operation interface and an adapter implying a cuvette holder, as well as a suitable illumination source. SmartFluo is based on stimulated fluorescence of water constituents such as chlorophyll a...
March 25, 2017: Sensors
https://www.readbyqxmd.com/read/28346291/round-and-oval-window-anatomic-variability-its-implication-for-the-vibroplasty-technique
#12
Marta Mancheño, Miguel Aristegui, Jose Ramon Sañudo
OBJECTIVE: The objective of this study is to evaluate the anatomical variability of round and oval window regions and its relationship with their closest structures, to determine its implication on the fitting and stabilization of the middle ear implant Vibrant Soundbridge. METHODS: Variations of the anatomy of round and oval window regions were assessed in a total of 85 human dissected temporal bones. Afterward, we evaluated the adaptation and subsequent stabilization of the floating mass transducer (FMT) of the Vibrant Soundbridge in 67 cases in round window (RW) and in 22 cases in oval window (OW), and the influence that the variability of the different anatomical features examined had on this stabilization...
March 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28346277/myopic-laser-corneal-refractive-surgery-reduces-interdevice-agreement-in-the-measurement-of-anterior-corneal-curvature
#13
Haiying Jin, Zhongmin Ou, Haike Guo, Peiquan Zhao
OBJECTIVES: To investigate interdevice differences and agreement in the measurement of anterior corneal curvature obtained by different technologies after laser corneal refractive surgery. METHODS: The prospective study comprised 109 eyes of 109 consecutive patients who had undergone laser-assisted in situ keratomileusis (LASIK). Preoperative and postoperative corneal parameters were measured by Scheimpflug imaging (Pentacam), Placido-slit-scanning (Orbscan) and auto-keratometry (IOLMaster)...
March 24, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28346276/comparison-of-noncontact-specular-and-confocal-microscopy-for-evaluation-of-corneal-endothelium
#14
Jianyan Huang, Jyotsna Maram, Tudor C Tepelus, Srinivas R Sadda, Vikas Chopra, Olivia L Lee
PURPOSE: To compare endothelial cell analysis obtained by noncontact specular and confocal microscopy, using the Konan NSP-9900 and Nidek ConfoScan4 systems, respectively. METHODS: Three groups including 70 healthy eyes, 49 eyes with Fuchs endothelial corneal dystrophy (FECD), and 78 eyes with glaucoma were examined with both the Konan NSP-9900 specular microscope and the Nidek ConfocScan4 confocal microscope. Certified graders at the Doheny Image Reading Center compared corneal endothelial images from both instruments side by side to assess image quality...
March 24, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28346222/sign-determination-methods-for-the-respiratory-signal-in-data-driven-pet-gating
#15
Ottavia Bertolli, Simon Arridge, Scott D Wollenweber, Charles W Stearns, Brian F Hutton, Kris Thielemans
Patient respiratory motion during PET image acquisition leads to blurring in the reconstructed images and may cause significant artifacts, resulting in decreased lesion detectability, inaccurate standard uptake value calculation and incorrect treatment planning in radiation therapy. To reduce these effects data can be regrouped into (nearly) 'motion-free' gates prior to reconstruction by selecting the events with respect to the breathing phase. This gating procedure therefore needs a respiratory signal: on current scanners it is obtained from an external device, whereas with data driven (DD) methods it can be directly obtained from the raw PET data...
March 27, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28346220/magnetocrystalline-two-fold-symmetry-in-cafe2o4-single-crystal
#16
Ashish Chhaganlal Gandhi, Rajasree Das, Fang-Cheng Chou, Jauyn Grace Lin
Understanding of magnetocrystalline anisotropy in CaFe2O4 is a matter of importance for its future applications. A high quality single crystal CaFe2O4 sample is studied by using synchrotron x-ray diffraction, a magnetometer and the electron spin resonance (ESR) technique. A broad feature of the susceptibility curve around room temperature is observed, indicating the development of 1D spin interactions above the on-set of antiferromagnetic transition. The angular dependency of ESR reveals an in-plane two-fold symmetry, suggesting a strong correlation between the room temperature spin structure and magnetocrystalline anisotropy...
March 27, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28346219/semiconductor-devices-for-entangled-photon-pair-generation-a-review
#17
Adeline Orieux, Marijn A M Versteegh, Klaus Jöns, Sara Ducci
Entanglement is one of the most fascinating properties of quantum mechanical systems; when two particles are entangled the measurement of the properties of one of the two allows to instantaneously know the properties of the other, whatever the distance separating them. In parallel with fundamental research on the foundations of quantum mechanics performed on complex experimental set-ups, we assist today to a bourgeoning of quantum information technologies bound to exploit entanglement for a large variety of applications such as secure communications, metrology and computation...
March 27, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28346218/wafer-scale-production-of-highly-uniform-two-dimensional-mos2-by-metal-organic-chemical-vapor-deposition
#18
TaeWan Kim, Jihun Mun, Hyeji Park, DaeHwa Joung, Mangesh Diware, Won Chegal, Jonghoo Park, Soo-Hwan Jeong, Sang-Woo Kang
Semiconducting two-dimensional (2D) materials, particularly, extremely thin molybdenum disulfide (MoS2) films are attracting considerable attention from the academia and industry owing to their distinctive optical and electrical properties. Here, we present the direct growth of a MoS2 monolayer with unprecedented spatial and structural uniformity across an entire 8-inch SiO2/Si wafer. The influences of growth pressure, ambient gases (Ar, H2), and S/Mo molar flow ratio on the MoS2 layered growth were explored by considering the domain size, nucleation sites, morphology, and impurity incorporation...
March 27, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28346215/enhanced-optoelectronic-quality-of-perovskite-films-with-excess-ch3nh3i-for-high-efficient-solar-cells-in-ambient-air
#19
Yunhai Zhang, Huiru Lv, Can Cui, Lingbo Xu, Peng Wang, Hao Wang, Xuegong Yu, Jiangsheng Xie, Jiabin Huang, Zeguo Tang, Deren Yang
The solution-processed polycrystalline perovskite film contributes critically to the high photovoltaic performance of perovskite based solar cells (PSCs). The inevitable electronic trap states at grain boundaries and the intrinsic defects such as metallic lead (Pb0) and halide vacancies in perovskite film cause serious carrier recombination loss. Furthermore, the film can easily decompose into PbI2 in moisture atmosphere. Here, we introduce a simple strategy through a small increase in methylammonium iodide (CH3NH3I, MAI) molar proportion (5%) for perovskite fabrication in ambient air with a ~50% relative humidity...
March 27, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28346209/accuracy-considerations-in-sterile-compounding
#20
Michael J Akers
Published information about the accuracy of filling and closing operations of sterile products is limited and guidelines on the topic are very general. This article highlights the basic principles in sterile-product filling of syringes and vials. Also covered in this article are descriptions of some of the available devices for filling containers, a brief discussion of the advances in vial and syringe filling, a discussion on the advantages and disadvantages of sterile product filling methods, and a discussion on possible problems encountered during filling operations...
March 2017: International Journal of Pharmaceutical Compounding
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