Interactive Collision Detection for Deformable Models using Streaming AABBs

Xinyu Zhang,Young J. Kim 한국HCI학회 2007 한국HCI학회 학술대회 Vol.2007 No.2

Simple Culling Methods for Continuous Collision Detection of Deforming Triangles

Xinyu Zhang,Kim, Young J. IEEE 2012 IEEE transactions on visualization and computer gr Vol.18 No.7

<P>We present a simple and efficient approach for continuous collision detection of deforming triangles based on conservative advancement. The efficiency of our approach is due to a sequence of simple collision-free conditions for deforming triangles. In our experiment, we show that our CCD algorithm achieves 2-30 times performance improvement over existing algorithms for triangle primitives.</P>

Interactive Collision Detection for Deformable Models Using Streaming AABBs

Xinyu Zhang,Kim, Y.J. IEEE Computer Society 2007 IEEE transactions on visualization and computer gr Vol.13 No.2

<P>We present an interactive and accurate collision detection algorithm for deformable, polygonal objects based on the streaming computational model. Our algorithm can detect all possible pairwise primitive-level intersections between two severely deforming models at highly interactive rates. In our streaming computational model, we consider a set of axis aligned bounding boxes (AABBs) that bound each of the given deformable objects as an input stream and perform massively-parallel pairwise, overlapping tests onto the incoming streams. As a result, we are able to prevent performance stalls in the streaming pipeline that can be caused by expensive indexing mechanism required by bounding volume hierarchy-based streaming algorithms. At runtime, as the underlying models deform overtime, we employ a novel, streaming algorithm to update the geometric changes in the AABB streams. Moreover, in order to get only the computed result (i.e., collision results between AABBs) without reading back the entire output streams, we propose a streaming en/decoding strategy that can be performed in a hierarchical fashion. After determining overlapped AABBs, we perform a primitive-level (e.g., triangle) intersection checking on a serial computational model such as CPUs. We implemented the entire pipeline of our algorithm using off-the-shelf graphics processors (GPUs), such as nVIDIA GeForce 7800 GTX, for streaming computations, and Intel Dual Core 3.4G processors for serial computations. We benchmarked our algorithm with different models of varying complexities, ranging from 15K up to 50K triangles, under various deformation motions, and the timings were obtained as 30~100 FPS depending on the complexity of models and their relative configurations. Finally, we made comparisons with a well-known GPU-based collision detection algorithm, CULLIDE and observed about three times performance improvement over the earlier approach. We also made comparisons with a SW-based AABB culling algorithm and observed about two times improvement</P>

Scalable Collision Detection Using p-Partition Fronts on Many-Core Processors

Xinyu Zhang,Kim, Young J. IEEE Computer Society 2014 IEEE transactions on visualization and computer gr Vol. No.

<P>We present a new parallel algorithm for collision detection using many-core computing platforms of CPUs or GPUs. Based on the notion of a p-partition front, our algorithm is able to evenly partition and distribute the workload of BVH traversal among multiple processing cores without the need for dynamic balancing, while minimizing the memory overhead inherent to the state-of-the-art parallel collision detection algorithms. We demonstrate the scalability of our algorithm on different benchmarking scenarios with and without using temporal coherence, including dynamic simulation of rigid bodies, cloth simulation, and random collision courses. In these experiments, we observe nearly linear performance improvement in terms of the number of processing cores on the CPUs and GPUs.</P>

Xylazole inhibits NO-cGMP pathway in fetal rat nerve cells

Xinyu Wang,Yue Wu,Lin Liu,Hui Bai,Zhiheng Zhang,Mingchao Zhao,Tianwen Ma,Xiaopeng Song,Lina Jia,Liangyu Lv,Yue Yu,Xinyu Xu,Hong Chen,Li Gao 대한수의학회 2022 Journal of Veterinary Science Vol.23 No.1

Background: Xylazole (Xyl) is a veterinary anesthetic that is structurally and functionally similar to xylazine. However, the effects of Xyl in vitro remain unknown. Objectives: This study aimed to investigate the anesthetic mechanism of Xyl using fetal rat nerve cells treated with Xyl. Methods: Fetal rat nerve cells cultured for seven days were treated with 10, 20, 30, and 40 μg/ mL Xyl for 0, 5, 10, 15, 20, 25, 30, 45, 60, 90, and 120 min. Variations of amino acid neurotransmitters (AANTs), Nitric oxide-Cyclic GMP (NO-cGMP) signaling pathway, and ATPase were evaluated. Results: Xyl decreased the levels of cGMP and NO in nerve cells. Furthermore, Xyl affected the AANT content and Na+-K+-ATPase and Ca2+-Mg2+-ATPase activity in nerve cells. These findings suggested that Xyl inhibited the NO-cGMP signaling pathway in nerve cells in vitro. Conclusions: This study provided new evidence that the anesthetic and analgesic effects of Xyl are related to the inhibition of the NO-cGMP signaling pathway.

Surface oxidation of PAN‑based ultrahigh modulus carbon fibers (UHMCFs) and its effect on the properties of UHMCF/EP composites

Xinyu Wang,Xin Qian,Yonggang Zhang,Xuefei Wang,Shulin Song,Cheng Zhang 한국탄소학회 2021 Carbon Letters Vol.31 No.3

In this study, nitric acid oxidation with varied treatment temperature and time was conducted on the surfaces of polyacrylonitrile- based ultrahigh modulus carbon fibers. Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and surface tension/dynamic contact angle instruments were used to investigate changes in surface topography and chemical functionality before and after surface treatment. Results showed that the nitric acid oxidation of ultrahigh modulus carbon fibers resulted in decreases in the values of the crystallite thickness Lc and graphitization degree. Meanwhile, increased treating temperature and time made the decreases more obviously. The surfaces of ultrahigh modulus carbon fibers became much more activity and functionality after surface oxidation, e.g., the total surface energy of oxidized samples at 80 °C for 1 h increased by 27.7% compared with untreated fibers. Effects of surface nitric acid oxidation on the mechanical properties of ultrahigh modulus carbon fibers and its reinforced epoxy composites were also researched. Significant decreases happened to the tensile modulus of fibers due to decreased Lc value after the nitric acid oxidation. However, surface treatment had little effect on the tensile strength even as the treating temperature and processing time increased. The highest interfacial shear strength of ultrahigh modulus carbon fibers/epoxy composites increased by 25.7% after the nitric acid oxidation. In the final, surface oxidative mechanism of ultrahigh modulus carbon fibers in the nitric acid oxidation was studied. Different trends of the tensile strength and tensile modulus of fibers in the nitric acid oxidation resulted from the typical skin–core structure.

Gut Microbiome Alterations and Functional Prediction in Chronic Spontaneous Urticaria Patients

( Xinyue Zhang ),( Jun Zhang ),( Zhaowei Chu ),( Linjing Shi ),( Songmei Geng ),( Kun Guo ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.5

The effects of the gut microbiome on both allergy and autoimmunity in dermatological diseases have been indicated in several recent studies. Chronic spontaneous urticaria (CSU) is a disease involving allergy and autoimmunity, and there is no report detailing the role of microbiota alterations in its development. This study was performed to identify the fecal microbial composition of CSU patients and investigate the different compositions and potential genetic functions on the fecal microbiota between CSU patients and normal controls. The gut microbiota of CSU patients and healthy individuals were obtained by 16s rRNA massive sequencing. Gut microbiota diversity and composition were compared, and bioinformatics analysis of the differences was performed. The gut microbiota composition results showed that Firmicutes, Bacteroidetes, Proteobacteria, and Verrucomicrobia were dominant microbiota in CSU patients. The differential analysis showed that relative abundance of the Proteobacteria (p = 0.03), Bacilli (p = 0.04), Enterobacterales (p = 0.03), Enterobacteriaceae (p = 0.03) was significantly increased in CSU patients. In contrast, the relative abundance of Megamonas, Megasphaera, and Dialister (all p < 0.05) in these patients significantly decreased compared with healthy controls. The different microbiological compositions impacted normal gastrointestinal functions based on function prediction, resulting in abnormal pathways, including transport and metabolism. We found CSU patients exhibited gut microbiota dysbiosis compared with healthy controls. Our results indicated CSU is associated with gut microbiota dysbiosis and pointed out that the bacterial taxa increased in CSU patients, which might be involved in the pathogenesis of CSU. These results provided clues for future microbial-based therapies on CSU.

Digital Orientation for Emerging Multinationals and the Location Strategies in Internationalization: The Chinese Experience

Xinyue Zhang,Bo Kyung Kim,Jooyoung Kwak 강원대학교 경영경제연구소 2023 Asia-Pacific Journal of Business Vol.14 No.3

Purpose- Despite the ongoing digital transformation, it is not clear whether emerging market firms follow their manufacturing FDI path in the emerging digital industries. This paper examines how digital orientation affects the location strategies in internationalization and how the existing innovation capacities moderate the link between digital orientation and the location strategies. Design/methodology/approach- This study chooses the Chinese setting for research design because digital transformation is already prevalent in the society and the cases of outward expansion are salient among the emerging markets. It uses the panel dataset of 976 Chinese listed firms that consists of 6,648 observations spanning from 2007 to 2017. Ordinary least square regression is used for the statistical approach with a one-year lag in the model. Findings- Digital orientation increases a likelihood of emerging multinationals’ entries in developed countries, and a high level of innovative capacities strengthens the link. Two groups seem to prefer entries in developed countries: firms with a high level of digital orientation with a high level of innovative capacities and firms with a low level of digital orientation, if with a low level of innovative capacities. The former reflects the context of digital transformation and the latter hints at the tax avoidance or interests in real estate. Research implications or originality -While emerging multinationals are known to prefer entries in developing countries for capacity arbitrage, our results forecast that their FDI strategies may have a drastic change as digital transformation deepens.

An exploratory study of users’ IoT adoption in the logistics industry using an integrated TAM-TOE model Based on Cainiao Network

Xinyue Zhang(장신웨),Sangyoon Lee(이상윤) 한국유통학회 2021 한국유통학회 학술대회 발표논문집 Vol.2021 No.11

Vascular bundle xylem water transport repression and cell anatomical structure differences may lead to berry cracking near the proximal end

Zhang Chuan,Cui Liwen,Shen Meng,Yadav Vivek,Zhong Haixia,Zhang Fuchun,Zhou Xiaoming,Wu Xinyu 한국원예학회 2024 Horticulture, Environment, and Biotechnology Vol.65 No.2

Grape berries often crack near the proximal end, which may be related to water absorption and their cellular anatomical structure. To study the relationship between water absorption, cell anatomical structures, and berry cracking near the proxi mal end, 49 varieties were selected. Eighteen were prone to cracking near the proximal end, while 31 were resistant. An in vitro soaking experiment on ripe berries measured the diff erence in berry-cracking degrees among diff erent varieties. In vitro staining was used to trace water absorption and paraffi n sections were prepared to observe and analyze the struc tural parameters of diff erent tissues. Results showed that the cracking rate and water uptake of the crack-prone berries were signifi cantly higher than those of the crack-resistant berries. Fruit prone to cracking was characterized by a thinner cuticle, epidermis, and sub-epidermis. After staining, it was found that dye absorption was limited to the berry near the proximal end. Other cell size parameters may also lead to cracking near the proximal end. By tracing water transport and analyzing diff erences in cell structure characteristics among varieties, we speculated that the vascular bundle xylem water transport repression and diff erences in cell anatomical structures may have led to berry cracking near the proximal end. The reasons for berry cracking near the proximal end were preliminarily explained, providing theoretical support for further screening of crack-resistant varieties.