1,603 research outputs found
sj-docx-1-tag-10.1177_17562848241239551 – Supplemental material for Comparison of long-term outcomes of endoscopic ultrasound-guided hepaticogastrostomy and choledochoduodenostomy for distal malignant biliary obstruction: a multicenter retrospective study
No full textSupplemental material, sj-docx-1-tag-10.1177_17562848241239551 for Comparison of long-term outcomes of endoscopic ultrasound-guided hepaticogastrostomy and choledochoduodenostomy for distal malignant biliary obstruction: a multicenter retrospective study by Dongwook Oh, Sung Yong Han, Sang Hyub Lee, Seong-Hun Kim, Woo Hyun Paik, Hyung-Ku Chon, Tae Jun Song, Se Woo Park and Jae Hee Cho in Therapeutic Advances in Gastroenterology</p
Lightweight Monocular Depth Estimation via Token-Sharing Transformer
No full textDepth estimation is an important task in various robotics systems and applications. In mobile robotics systems, monocular depth estimation is desirable since a single RGB camera can be deployable at a low cost and compact size. Due to its significant and growing needs, many lightweight monocular depth estimation networks have been proposed for mobile robotics systems. While most lightweight monocular depth estimation methods have been developed using convolution neural networks, the Transformer has been gradually utilized in monocular depth estimation recently. However, massive parameters and large computational costs in the Transformer disturb the deployment to embedded devices. In this paper, we present a Token-Sharing Transformer (TST), an architecture using the Transformer for monocular depth estimation, optimized especially in embedded devices. The proposed TST utilizes global token sharing, which enables the model to obtain an accurate depth prediction with high throughput in embedded devices. Experimental results show that TST outperforms the existing lightweight monocular depth estimation methods. On the NYU Depth v2 dataset, TST can deliver depth maps up to 63.4 FPS in NVIDIA Jetson nano and 142.6 FPS in NVIDIA Jetson TX2, with lower errors than the existing methods. Furthermore, TST achieves real-time depth estimation of high-resolution images on Jetson TX2 with competitive results
생체 센서 및 생체 센서를 포함하는 전자 장치
No full textA sensor for sensing biometric information includes a light emitting unit that emits a first light ray, a light receiving unit that receives a second light ray, where the second light ray includes a portion of the first light ray reflected by a body of a user, and an optical layer placed over the light emitting unit and the light receiving unit. The optical layer has a first surface facing the light emitting unit and the light receiving unit and a second surface opposite the first surface. The optical layer further includes an asymmetrical protrusion structure formed on the first surface or the second surface and including a plurality of asymmetrical protrusion units. The optical layer may further include a symmetrical protrusion structure formed on the first surface or the second surface opposite the asymmetrical protrusion structure and including a plurality of symmetrical protrusion units
Ionic Conductivity of Ruddlesden‐Popper Layered Perovskites (Li <sub>2</sub> SrTa <sub>2</sub> O <sub>7</sub> , Li <sub>2</sub> SrNb <sub>2</sub> O <sub>7</sub> , and Li <sub>2</sub> CaTa <sub>2</sub> O <sub>7</sub> ) with Poly (ethylene oxide) as a Composite Solid Electrolyte
No full textWe report the ionic conductivity studies of three different Ruddlesden-Popper layered perovskite (RP-LP) materials (Li2SrTa2O7, Li2SrNb2O7, and Li2CaTa2O7) in composites with poly (ethylene oxide) (PEO). For the first time, the lithium-ion conduction pathway in the RP-LP materials, of n=2 in AnA'BnO3n+1 general crystal structure, have been studied by using bond valence sum mapping. The results show a two-dimensional lithium-ion pathway. The temperature dependence of the conductivity is modelled by using a Vogel-Tamman-Fulcher (VTF)-type relationship for PEO RP-LP and pure PEO samples. The PEO RP-LP composites deliver ionic conductivities in the range of 3.32 to 4.09×10-06σcm-2 at 80°C, and their corresponding activation energies range from 6.37 to 7.01kJmol-1 at the calculated temperature slope range of 50 to 80°C. They also deliver appreciable lithium transference numbers in the range of 0.20 to 0.58 at 30°C and an excellent wide potential window stability of 4V. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.1
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No full textDepartment of Mathematical SciencesThis thesis is a thorough review of the Ph.D thesis titled "The Zeros of Elliptic Curve -functions" by Simon Spicer. His thesis is devoted to compute the ranks of elliptic curves. Firstly, we provide basic knowledge and facts about elliptic curves and in Section 8, we explain his algorithm. Below is his algorithm to compute the rank of elliptic curves.
\bigskip
Let be an elliptic curve with the global minimal Weierstrass equation with the conductor .
The algorithm goes like :
\begin{enumerate}
\item
Compute the real period of .
\item
Set .
\item
Evaluate to bits precision.
\item
If -bit binary digits are not zero, then the rank is 0.
\item
Otherwise, and now evaluate . That is, .
\item
This procedure stops if is not zero to bits precision, and then output the analytic rank of elliptic curve .
\end{enumerate}
\bigskip
For elliptic curves with large conductors, we give an upper bound and a lower bound on the rank.
\begin{align*}
\frac{1}{2} \log{N_E} -4.426 - \beta_E < r_E < 0.5 +0.32 \log{N_E}.
\end{align*}
In the last section, we collected a list of minor mistakes and typos in his thesis.
\vfillope
Comparison of tracheal reconstruction with allograft, fresh xenograft and artificial trachea scaffold in a rabbit model
No full textThis study evaluated the possibility of tracheal reconstruction with allograft, pig-to-rabbit fresh xenograft or use of a tissue-engineered trachea, and compared acute rejection of three different transplanted tracheal segments in rabbits. Eighteen healthy New Zealand White rabbits weighing 2.5-3.1 kg were transplanted with three different types of trachea substitutes. Two rabbits and two alpha 1, 3-galactosyltransferase gene-knockout pigs weighing 5 kg were used as donors. The rabbits were divided into three groups: an allograft control group consisting of rabbit-to-rabbit allotransplantation animals (n= 6), a fresh xenograft group consisting of pig-to-rabbit xenotransplantation animals (n = 6), and an artificial trachea scaffold group (n = 6). All animals were monitored for 4 weeks for anastomotic complications or infection. The recipients were sacrificed at 28 days after surgery and the grafts were evaluated. On bronchoscopy, all of the fresh xenograft group animals showed ischemic and necrotic changes at 28 days after trachea replacement. The allograft rabbits and the tissue-engineered rabbits showed mild mucosal granulation. The levels of interleukin-2 and interferon-gamma in the fresh xenograft group were higher than in other groups. Histopathologic examination of the graft in the fresh xenograft rabbits showed ischemic and necrotic changes, including a loss of epithelium, mucosal granulation, and necrosis of cartilaginous rings. The pig-to-rabbit xenografts showed more severe acute rejection within a month than the rabbits with allograft or artificial trachea-mimetic graft. In addition, the artificial tracheal scaffold used in the present experiment is superior to fresh xenograft and may facilitate tracheal reconstruction in the clinical setting.11sciescopu
Integrated and scalable molecular brain mapping
No full textThesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 143-158).Understanding the brain requires integrative knowledge of its cellular-, network-, and system-level architectures. Existing volume imaging techniques have proven the potential to provide such information, but the lack of technology to label large volumes for visualization has limited their utility. Here, we address this challenge by developing technologies -- stochastic electrotransport and SWITCH -- to extend multiplexed labeling methods to larger volumes. Stochastic electrotransport selectively expedites transport of molecular probes into the tissue without damaging it. SWITCH synchronizes the labeling reaction to achieve consistent and uniform labeling. These technologies are demonstrated by successfully visualizing several molecular markers in adult mouse brain tissues, which have been previously infeasible in time and cost. Although our focus is on neuroscience, the concepts and methods described in this thesis are quite general. Stochastic electrotransport will be applicable to any nonlinear transport problems, and SWITCH will be applicable to any problem requiring synchronization of reaction kinetics across long distances..by Jae H. Cho.Ph. D
ENVIRONMENTAL FATIGUE OF METALLIC MATERIALS IN NUCLEAR POWER PLANTS – A REVIEW OF KOREAN TEST PROGRAMS
No full textEnvironmental fatigue of the metallic components in light water reactors has been the subject of extensive research and regulatory interest in Korea and abroad. Especially, it was one of the key domestic issues for the license renewal of operating reactors and licensing of advanced reactors during the early 2000s. To deal with the environmental fatigue issue domestically, a systematic test program has been initiated and is still underway. The materials tested were SA508 Gr.1a low alloy steels, 316LN stainless steels, cast stainless steels, and an Alloy 690 and 52M weld. Through tests and subsequent analysis, the mechanisms of reduced low cycle fatigue life have been investigated for those alloys. In addition, the effects of temperature, dissolved oxygen level, and dissolved hydrogen level on low cycle fatigue behaviors have been investigated. In this paper, the test results and key analysis results are briefly summarized. Finally, an on-going test program for hot-bending of 347 stainless steel is introduced
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