检索结果-南通市图书馆

UBVVI Surface Photometry of the Spiral Galaxy NGC 300 in the Sculptor Group

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2004年第4期4卷 299-310页

作者： sang chul kim Hwankyung Sung Hong Soo Park Eon-Chang Sung Korea Astronomy Observatory Taejon 305-348Republic of KoreaDepartment of Astronomy and Space ScienceSejong University98 Gunja-dongGwangjin-guSeoul 143-747Republic of KoreaAstronomy ProgramSEESSeoul National UniversitySeoul 151-742Republic of KoreaKorea Astronomy ObservatoryTaejon 305-348Republic of Korea

We present UBVI surface photometry over a 20.5' × 20.5' area of the late-type spiral galaxy NGC 300. We have derived isophotal maps, surface brightness profiles, ellipticity profiles, position angle profiles, and color profiles. By merging our I-band measurements with those of Boker et al. based on Hubble Space Telescope observations, we have obtained combined I-band surface brightness profiles for the region 0.02' < r < 500' and have decomposed the profiles into three components: a nucleus, a bulge, and an exponential disk.

关键词： galaxies: spiral - galaxies: photometry - galaxies: individual(NGC 300) - galaxies: nuclei

Transcriptional Regulation of Lipid Catabolism during Seedling Establishment

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2020年第7期13卷 984-1000页

作者： Guangqin Cai sang-chul kim Jianwu Li Yongming Zhou Xuemin Wang National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China Department of Biology University of MissouriSt.LouisMO 63121USA Donald Danforth Plant Science Center St.LouisMO 63132USA Henan Agricultural University ZhengzhouHenan 450002China

Lipid catabolism in germinating seeds provides energy and substrates for initial seedling growth,but how this process is regulated is not well ***,we show that an AT-hook motif-containing nuclear localized(AHL)protein regulates lipid mobilization and fatty acid p-oxidation during seed germination and seedling ***4 was identified to directly interact with the lipid mediator phosphatidic acid(PA).Knockout(KO)of AHL4 enhanced,but overexpression(OE)of AHL4 attenuated,triacylglycerol(TAG)degradation and seedling *** seedling growth of the OE lines was restored by sucrose supplementation to the growth ***4-OE seedlings displayed decreased expression of genes involved in TAG hydrolysis and fatty acid oxidation,whereas the opposite was observed in *** genes contained AHL4-binding cis elements,and AHL4 was shown to bind to the promoter regions of genes encoding the TAG lipases SDP1 and DALL5 and acyl-thioesterase *** AHL4-DNA interactions were suppressed by PA species that bound to *** results indicate that AHL4 suppresses lipid catabolism by repressing the expression of specific genes involved in TAG hydrolysis and fatty acid oxidation,and that PA relieves AHL4-mediated suppression and promotes TAG ***,AHL4 and PA together regulate lipid degradation during seed germination and seedling establishment.

关键词： lipid catabolism lipid regulation phosphatidic acid seed germination seedling establishment transcriptional regulation

Near-infrared studies of nova V5584 Sgr in the pre-maximum and early decline phase

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2015年第7期15卷 993-1004页

作者： Ashish Raj D.P.K.Banerjee N.M.Ashok sang chul kim Korea Astronomy and Space Science Institute (KASI) Physical Research Laboratory Korea University of Science and Technology (UST)

We present near-infrared spectroscopic and photometric observations of nova V5584 Sgr taken during the first 12 d following its discovery on Oct. 26.439 UT2009. The evolution of the spectra is shown from the initial P Cygni phase to an emission line phase. The prominent carbon lines seen in the JHK spectra closely match those observed in an Fe II class nova outburst. The spectra show first-overtone CO bands in emission between 2.29-2.40 μm. By examining WISE and other publicly available data, we show that the nova underwent a pronounced dust formation phase between February- April 2010.

关键词： line: identification -- techniques: spectroscopic -- stars: individual(V5584 Sgr) -- novae cataclysmic variables

A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian Guo Kunpeng Li Wei Yue Nam‑Young kim Yang Li Guozhen Shen Jong‑chul Lee Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul 01897South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State Key Laboratory of Integrated Chips and Systems Fudan UniversityShanghai 200433People’s Republic of China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

Adhesion and Suction Functions of the Tip Region of a Nectar-drinking Butterfly Proboscis

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2017年第4期14卷 600-606页

作者： Seung chul Lee Jun Ho kim sang Joon Lee Department of Mechanical Engineering Pohang University of Science and Technology Pohang 37673 Gyeongbuk Republic of Korea Center for Biofluid and Biomimic Research Pohang University of Science and Technology Pohang 37673 Gyeongbuk Republic of Korea

In this study, we investigated the dynamic functions of the tip region of the butterfly proboscis through which liquid is sucked during liquid feeding. The microstructures and flow patterns in the tip region of the proboscis were in vivo analyzed. The tip region can be divided into two functional sections： namely adhesion and suction sections. The liquid adheres to the adhesion section during liquid suction. Although the tip region has numerous slits connected to food canal of the proboscis, liquid is mainly sucked through the suction section, which section is submerged in the fluid pulled by the adhesion section and then successfully imbibes liquid. To check the dynamic functions of the tip region, we fabricated a suction tip model having adhesion and suction parts. The in vitro model experiments show that the hydrophilicity of the adhesion part and the existence of the suction inlet improve the liquid uptake driven by a suction pump. This study may provide insights for the biomimetic design of nectar-feeding butterflies.

关键词： butterfly proboscis nectar-feeding strategy suction

Technical and instrumental prerequisites for single-port laparoscopic solo surgery:state of art

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第15期21卷 4440-4446页

作者： Say-June kim sang chul Lee Department of Surgery Daejeon St. Mary’s Hospital College of Medicine The Catholic University of Korea Daejeon

With the aid of advanced surgical techniques and instruments, single-port laparoscopic surgery(SPLS) can be accomplished with just two surgical members: an operator and a camera assistant. Under these circumstances, the reasonable replacement of a human camera assistant by a mechanical camera holder has resulted in a new surgical procedure termed singleport solo surgery(SPSS). In SPSS, the fixation and coordinated movement of a camera held by mechanicaldevices provides fixed and stable operative images that are under the control of the operator. Therefore, SPSS primarily benefits from the provision of the operator's eye-to-hand coordination. Because SPSS is an intuitive modification of SPLS, the indications for SPSS are the same as those for SPLS. Though SPSS necessitates more actions than the surgery with a human assistant, these difficulties seem to be easily overcome by the greater provision of static operative images and the need for less lens cleaning and repositioning of the camera. When the operation is expected to be difficult and demanding, the SPSS process could be assisted by the addition of another instrument holder besides the camera holder.

关键词： Camera holder Laparoscopy Single-portlaparoscopic surgery Single-port solo surgery Solosurgery

NLRP3 inflammasome activation and NETosis positively regulate each other and exacerbate proinflammatory responses:implications of NETosis inhibition for acne skin inflammation treatment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2024年第5期21卷 466-478页

作者： Hyo Jeong kim Yun sang Lee Bok-Soon Lee Chang-Hak Han sang Gyu kim chul-Ho kim Department of Otolaryngology School of MedicineAjou UniversitySuwonRepublic of Korea Department of Molecular Science and Technology Ajou UniversitySuwonRepublic of Korea

Inflammasomes are multiprotein complexes involved in the host immune response to pathogen ***,inflammasomes participate in many conditions,such as ***,it was shown that NETosis,a type of neutrophil cell death,is induced by bacterial infection and is involved in inflammatory diseases such as delayed wound healing in patients with ***,the relationship between inflammasomes and NETosis in the pathogenesis of inflammatory diseases has not been well *** this study,we determined whether NETosis is induced in ***-induced skin inflammation and whether activation of the nucleotide-binding domain,leucine-rich family,and pyrin domain-containing-3(NLRP3)inflammasome is one of the key factors involved in NETosis induction in a mouse model of acne skin *** found that NETosis was induced in ***-induced skin inflammation in mice and that inhibition of NETosis ameliorated ***-induced skin *** addition,our results demonstrated that inhibiting inflammasome activation could suppress NETosis induction in mouse *** results indicate that inflammasomes and NETosis can interact with each other to induce ***-induced skin inflammation and suggest that targeting NETosis could be a potential treatment for inflammasome-mediated diseases as well as NETosis-related diseases.

关键词： P.acnes NETosis NLRP3 inflammasome Skin inflammation

Effect of Sub-T_g Annealing on the Corrosion Resistance of the Cu–Zr Amorphous Alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2018年第3期31卷 273-280页

作者： sang-Soo Shin Hong-Kyu kim Jae-chul Lee Ik-Min Park Department of Materials Science and Engineering Pusan National University Advanced Analysis Center Korea Institute of Science and Technology Department of Materials Science and Engineering Korea University

Despite the economy of material cost and excellent toughness of Cu-based amorphous alloys,especially CusoZrso,their poor corrosion resistance to a chloride medium limits their widespread *** this study,corrosion tests were performed on the CusoZrso amorphous alloy with different degrees of short-range order,which were prepared by annealing below the glass transition temperature（Tg）.It was found that the corrosion resistance of amorphous alloys is improved to a significant level when the alloys were heated below *** studies showed that thermally activated relaxation process of created disorder,which occurs during sub-Tg annealing,is responsible for the improvement in the corrosion *** dynamics simulations performed on the Cu-Zr amorphous alloys demonstrated that the relaxation process of the alloys is associated with the formation of energetically stable icosahedra and icosahedron-like *** study highlights the effects of sub-Tg annealing on the improvement in the corrosion resistance of the amorphous alloys from the viewpoint the relaxation process of the short-range orders.

关键词： Amorphous alloys Corrosion Annealing Molecular dynamics Electrochemical performance

Overview of single-port laparoscopic surgery for colorectal cancers: Past, present, and the future

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第4期20卷 997-100页

作者： Say-June kim Byung-Jo Choi sang chul Lee Department of Surgery Daejeon St. Mary’s Hospital the Catholic University of Korea

Single-port laparoscopic surgery (SPLS) is implemented through a tailored minimal single incision through which a number of laparoscopic instruments access. Introduction of operation-customized port system, utilization of a camera without a separate external light, and instruments with different lengths has brought the favorable environment for SPLS. However, performing SPLS still creates several hardships compared to multiport laparoscopic surgery; a single-port system inevitably leads to clashing of surgical instruments due to crowding. To overcome such difficulties, investigators has developed novel concepts and maneuvers, including the concept of inverse triangulation and the maneuvers of pivoting, spreading out dissection, hanging suture, and transluminal traction. The final destination of SPLS is expected to be a completely seamless operation, maximizing the minimal invasiveness. Specimen extraction through the umbilicus can undermine cosmesis by inducing a larger incision. Therefore, hybrid laparoscopic technique, which combined laparoscopic surgical technique with natural orifice specimen extraction (NOSE) - i.e., transvaginal or transanal route-, has been developed. SPLS and NOSE seemed to be the best combination in pursuit of minimal invasiveness. In the near future, robotic SPLS with natural orifice transluminal endoscopic surgery’s way of specimen extraction seems to be pursued. It is expected to provide a completely or nearly complete seamless operation regardless of location of the lesion in the abdomen.

关键词： Colorectal neoplasms Colectomy Laparoscopy Natural orifice endoscopic surgery Single-port laparoscopic surgery