480 research outputs found
Supplemental Material, 817513_supplemental_materials - Targeted Promotions on an E-Book Platform: Crowding Out, Heterogeneity, and Opportunity Costs
No full textSupplemental Material, 817513_supplemental_materials for Targeted Promotions on an E-Book Platform: Crowding Out, Heterogeneity, and Opportunity Costs by Nathan Fong, Yuchi Zhang, Xueming Luo, and Xiaoyi Wang in Journal of Marketing Research</p
Hypergraph based visual categorization and segmentation
No full textThis dissertation explores original techniques for the construction of hypergraph models for computer vision applications. A hypergraph is a generalization of a pairwise simple graph, where an edge can connect any number of vertices. The expressive power of the hypergraph models places a special emphasis on the relationship among three or more objects, which has
made hypergraphs better models of choice in a lot of problems. This is in sharp contrast with the more conventional graph representation of visual patterns where only pairwise connectivity between objects is described. The contribution of this thesis is fourfold: (i) For the first time the advantage of the hypergraph neighborhood structure is analyzed. We argue that the summarized local grouping information contained in hypergraphs causes an ‘averaging’ effect which is beneficial to the clustering problems, just as local image smoothing may be beneficial to the image segmentation task. (ii) We discuss how to build hypergraph incidence structures and how to solve the related unsupervised and semi-supervised problems for three different computer vision scenarios:
video object segmentation, unsupervised image categorization and image retrieval. We compare
our algorithms with state-of-the-art methods and the effectiveness of the proposed methods is demonstrated by extensive experimentation on various datasets. (iii) For the application of image retrieval, we propose a novel hypergraph model — probabilistic
hypergraph to exploit the structure of the data manifold by considering not only the local grouping information, but also the similarities between vertices in hyperedges. (iv) In all three applications mentioned above, we conduct an in depth comparison between
simple graph and hypergraph based algorithms, which is also beneficial to other computer vision applications.Ph.D.Includes bibliographical referencesIncludes vitaby Yuchi Huan
Nepalomyia siveci Wang & Yang
No full text<i>Nepalomyia siveci</i> Wang & Yang <p> <i>Nepalomyia siveci</i> Wang & Yang, 2004: 381. Type locality: Taiwan, Hualien.</p> <p> <b>Diagnosis.</b> First flagellomere about 1.5 times longer than wide; epandrium with lateral tubercle bearing basal and apical hairs, hypandrium bifurcated; cercus without basal or middle tubercle, but bearing sparse hairs.</p> <p> <b>Specimens examined.</b> 4 3, Taiwan: Nantou, Yuchi, Lianhua Pond (675 m) (23°92' N, 120°67' E), 11.XI.2010, Ding Yang.</p> <p> <b>Distribution.</b> Taiwan (Nantou, Hualien).</p> <p> <b>Remarks.</b> See Wang and Yang (2004) for description and illustration of this species.</p>Published as part of <i>Wang, Mengqing, Chen, Hongyin & Yang, Ding, 2013, Species of Nepalomyia Hollis from Taiwan (Diptera: Dolichopodidae: Peloropeodinae), pp. 436-442 in Zootaxa 3691 (4)</i> on pages 438-439, DOI: 10.11646/zootaxa.3691.4.2, <a href="http://zenodo.org/record/220731">http://zenodo.org/record/220731</a>
Fig. 1. Collectionsitesfor 91 specimensfrom 29 locationsof Apodemusagrarius, usedin thisstudy. ThespecimennumberforeachlocationarelistedinTable 1 in Comparative Genetics Of Apodemus Agrarius (Rodentia: Mammalia) From Insular And Continental Eurasian Populations: Cytochrome B Sequence Analyses
No full textFig. 1. Collectionsitesfor 91 specimensfrom 29 locationsof Apodemusagrarius, usedin thisstudy. ThespecimennumberforeachlocationarelistedinTable 1, andminimum Jukes-Cantordistancesbetween 17 haplotypesfrommainlandKoreaandother 49 haplo- typesfromsevenregions (Taiwan, Jeju, northeasternChina, easternChina, centralChina, Far-easternRussia, andEurope) basedonthecytochrome b completesequencesaregivenPublished as part of Koh, Hung, Shaner, Pei, Csorba, Gábor, Wang, Yuchi, Jang, Kyung & Lee, Jong, 2014, Comparative Genetics Of Apodemus Agrarius (Rodentia: Mammalia) From Insular And Continental Eurasian Populations: Cytochrome B Sequence Analyses, pp. 73-84 in Acta Zoologica Academiae Scientiarum Hungaricae 60 (1) on page 77, DOI: 10.5281/zenodo.573628
[[alternative]]The Success Rate of Young Elite Badminton Players of Anticipating Overhead Backhand Shots of Different Skill Leveled Opponents
No full text[[abstract]]This research is to examine the accuracy of anticipation of points of landing of an overhead backhand shot based on visual pre-cues of different stages of the shot motion given to the player, and furthermore discover the crucial cues of different overhead backhand shots. The subjects of this research(N=52) are young elite athletes of the age of 16.5±1.20. With three female athletes with different skill levels of professional training to provide the footage of a series of overhead backhand shots. With the use of a digital video camera and post production to produce three stages of visual pre-cueing and a total of 180 shots to use in a temporal occlusion paradigm. The subjects are to decide on the landing point within three seconds of viewing the images. The rate of accurate identification was calculated using paired T-test as the method of statistical analysis, and showed a clear level of 0.5.
The results show:
1.Through the different stages and increase of visual pre-cues, the success rate of identifying landing points of the high level and low level athlete greatly increased. The difference in successful identification rates of the 3 stages of motion all achieve clear level.
2.In stage one of visual pre-cueing, the difference in success rate of identifying landing points did not achieve a clear level and were close to identical among the three skill levels. In stage 2, the success rate of identifying landing points between high skilled athlete and middle skilled athlete were clearly different. In stage 3 of visual pre-cues, all three skill levels had different success rates of identifying landing points.
3.The difference in success rates of identifying landing points between high skilled and middle skilled athletes were only similar for straight drop shot and cross-court drop shot, all other shots achieved a clear level of difference. The prediction of the four shots of the low skilled level athlete all achieved a clear level of difference.
Retinal neurovascular coupling in streptozotocin diabetic rats
No full text© 2019 Joe Yuchi WangDiabetic retinopathy (DR) is a significant cause of vision impairment worldwide, and it is projected to incur a rising global disease burden. Although the pathophysiology of diabetic retinopathy had been historically characterised as a vascular disease, there is a growing body of evidence to suggest that DR is also a process of retinal neurodegeneration. There is also evidence that functional changes occur to the retinal vasculature’s capacity to respond to physiological stimuli, before anatomical changes manifest. Additionally, there is evidence to suggest that neuronal dysfunction precedes anatomical evidence of neurodegeneration in both clinical and experimental studies of diabetes. These findings were examined in Chapter 2, and collectively suggest that functional deficits of both the vascular and neuronal retinal components may be key components of DR pathogenesis. Several research questions were proposed in this thesis in order to further understand vascular and neuronal interactions in the retina, at the earliest stages of diabetes.
In order to model an early stage of diabetic disease, 4 weeks of hyperglycaemia was introduced to a cohort of dark Agouti laboratory rats using streptozotocin (STZ). Flickering light was used to stimulate neuronal driven vasodilation in the retina, and the autoregulatory capacity of retinal vasculature was challenged through inhalation of oxygen and carbon dioxide. Electroretinography was conducted to assess retinal function, and the scotopic threshold response (STR) was recorded during gas inhalation as a measure of inner retinal functional response to an autoregulatory challenge. A series of pilot studies were undertaken to optimise the parameters of flicker stimulation, gas delivery, retinal imaging and electroretinography. These materials and methods were described in Chapter 3.
Flicker stimulation reliably produced vasodilation of inner retinal arteries and veins, although this response was not significantly affected by 4 weeks of STZ hyperglycaemia. Oxygen and carbon dioxide breathing introduced vasodilation and vasoconstriction of the inner retinal arteries and veins, respectively. The speed of venous vasoconstriction was reduced in STZ animals during oxygen breathing, and carbon dioxide breathing revealed a reduced arterial vasodilatory capacity in STZ animals. These findings were described and discussed in Chapter 4, and they indicate that, despite normal retinal neurovascular coupling, subtle autoregulatory deficits in the retinal vasculature are present at an early stage of diabetes.
The oscillatory potentials and STR were found to be reduced after 4 weeks of hyperglycaemia, suggesting a manifest deficit of inner retinal function. Additionally, carbon dioxide breathing introduced an increase in the peak positive STR (pSTR) amplitude in both normal and STZ animals, whereas oxygen breathing resulted in a decrease of pSTR amplitude that was more significant in the STZ cohort. These findings were described and discussed in Chapter 5, and they seem to suggest that that relative inner retinal ischemia may be present early in the course of diabetes. Furthermore, this effect could be exacerbated by vasoconstrictive stimuli.
The overall experimental findings suggest that neurovascular coupling is unaffected at an early stage of diabetes, despite findings of inner retinal dysfunction and subtle deficit of vascular autoregulation in the retina. This suggests, in addition to neuronal and vascular activity, that other physiological processes, likely mediated by glial cells, may be implicated in the modulation neurovascular interactions in the retina. These experimental findings and implications were discussed in Chapter 6, as well as study limitations and future directions of research
[[alternative]]Parents' Choice of Transregional Public Kindergarten: A Case Study of Yuchi Township
No full text[[abstract]] 早期幼教品質參差不齊，不管在教學、環境、師資或行政體制…等等方面，充斥著各自發展的亂象，政府為因應幼托整合方案，從2005年起開始試辦國幼班，屬實驗性質，至2011年六月，立法院三讀通過《幼兒教育及照顧法》法案，宣告2012年元旦開始實施，將幼稚園及托兒所整合為幼兒園，招收兩歲到六歲的學齡前幼兒；在課程方面擬定新課程綱要等配套措施，由教育部監督管理。 縱觀幼教改革從2005年至今2019年，歷經十五年的時間，其初為改善部分因社會不利條件或限制（偏遠地區交通不利）無法順利就學之幼童的學習機會，在離島三縣三鄉及原住民鄉鎮市，國小部內增設國幼班（招收4-6）歲學齡前幼兒，並招考代理幼教師，進駐學校，興建幼兒園教室、充實及改善教學環境，當時魚池鄉（南投縣原住民三鄉-魚池鄉、仁愛鄉、信義鄉）也在國幼班的輔導之下逐漸成長。 其後在2012年開始實施《幼兒教育及照顧法》法案，改制為幼兒園，魚池鄉共有八所國小附設幼兒園，近年來由於少子化的衝擊，加上各公私立幼兒園林立，招生變得越來越困難。 統計調查魚池鄉八所公立附設幼兒園，從2015年至2019年幼生人數的變動，可以發現各所公立附設幼兒園幼生的就學率幾乎都是下降的情況，但唯獨東光國小附設幼兒園的幼生就學率有不降反增的狀況，到底是甚麼原因？ 作者所服務的學校，為魚池鄉東光國小附設幼兒園，其中有三分之二是越區就讀的孩子，本研究採用問卷調查法及質性研究法，從文獻探討、調查表及訪談的過程中，了解影響幼兒園家長選擇學校時的資訊來源及考量因素，希望透過家長的角度，了解家長在為幼兒選擇學校時，真正在意的需求，根據訪談結果作綜合歸納統整,並分析與討論，最後提出具體的結論與建議，提供給予幼兒園經營者及教師作為改善之參考。[[abstract]] The quality of early childhood education varies, regardless of the teaching, environment, teachers or administrative system, etc., which are full of chaos in their respective developments. In response to the integration of child care, the government has started piloting national child care classes since 2005. The nature of the experiment. By the month of 2011, the three courts passed the Early Childhood Education and Care Act, announcing that it will be implemented on New Year 's Day 2012, integrating kindergartens and nurseries into kindergartens, and enrolling pre-school children from 2 to 6 years old. The new curriculum outline and other supporting measures are drawn up and supervised by the Ministry of Education. Throughout the fifteen years since the reform of preschool education from 2005 to 2019, at the beginning, in order to improve the learning opportunities of some children who could not go to school due to social disadvantages or restrictions (unfavorable transportation in remote areas), they were In townships and aboriginal towns and cities, additional elementary school children (4-6) years old preschool children were recruited in the elementary school, and enrolled acting young teachers, settled in schools, built kindergarten classrooms, enriched and improved the teaching environment. At that time, Yuchi Township (Nantou County) Indigenous three townships-Yuchi Township, Renai Township, and Xinyi Township) have also gradually grown up under the guidance of the National Youth Class. Since 2012, the ＂Early Childhood Education and Care Act＂ has been implemented into a kindergarten. There are eight kindergartens attached to Yuchi Township. In recent years, due to the impact of declining birthrates, and the addition of public and private kindergartens, the enrollment has become more and more It's getting harder. According to the statistical survey of the eight public kindergartens in Yuchi Township, the change in the number of infants from 2015 to 2019 can be found that the enrollment rate of young public kindergartens in all public kindergartens has almost declined, but only the pupil enrollment rate of the kindergarten attached to Dongguang Elementary School What is the reason why there is no decline but increase? The school served by the author is a kindergarten attached to Dongguang Elementary School in Yuchi Township, two-thirds of which are children from Yue District. This research uses questionnaire survey and qualitative research methods, from literature discussion, questionnaire and interview process In order to understand the sources of information and considerations that affect kindergarten parents when choosing a school. From the perspective of understanding the needs that parents really care about when choosing a school for young children, make a comprehensive summary based on the interview results, analyze and discuss, and finally put forward specific conclusions and recommendations to provide kindergarten operators and teachers as a reference for improvement
Chemistry Lab Automation via Constrained Task and Motion Planning
No full textChemists need to perform many laborious and time-consuming experiments in the
lab to discover and understand the properties of new materials. To support and
accelerate this process, we propose a robot framework for manipulation that
autonomously performs chemistry experiments. Our framework receives high-level
abstract descriptions of chemistry experiments, perceives the lab workspace,
and autonomously plans multi-step actions and motions. The robot interacts with
a wide range of lab equipment and executes the generated plans. A key component
of our method is constrained task and motion planning using PDDLStream solvers.
Preventing collisions and spillage is done by introducing a constrained motion
planner. Our planning framework can conduct different experiments employing
implemented actions and lab tools. We demonstrate the utility of our framework
on pouring skills for various materials and two fundamental chemical
experiments for materials synthesis: solubility and recrystallization.Comment: Equal author contribution from Naruki Yoshikawa, Andrew Zou Li,
Kourosh Darvish, Yuchi Zhao and Haoping X
Operations Management Strategies for Complex Supply Chains and Urban Logistics
No full textThe rapid evolution of supply chains and the growing complexity of urban logistics have made developing advanced operations management strategies necessary. The popularity of online shopping, new mobility services, and goods delivery has been steadily rising among consumers, particularly post-COVID-19. This stimulates the demand for omnichannel retailing and urban curb spaces for parking, pickup/drop-off, and loading/unloading. Consequently, both retailers and urban planners are exploring integrated approaches that simultaneously leverage rising online sales and efficiently manage curb space allocation.
However, prompt fulfillment, inventory balancing, and return management are challenging tasks in supply chain management that require coordination between online and offline channels to meet customer expectations and provide a seamless, consistent customer experience across all channels. In urban logistics, balancing the competing demands for various uses of curb spaces requires incorporating different peak times and usage patterns. The variability in curb space capacity and demand requires efficient management strategies to allocate curb space effectively in real-time. This dissertation addresses critical challenges in these domains by proposing integrated strategic frameworks to enhance operational performance and efficiency. By investigating optimal fulfillment and transshipment strategies in an omnichannel retailing context and developing a model for curb space capacity allocation, this research offers a comprehensive solution to the complex interplay between these two domains.
The first step is to enhance the performance and efficiency of the supply chain by investigating optimal fulfillment and transshipment strategies in an omnichannel retailing setting with customer cross-channel return behaviors. We built a dynamic programming model for an omnichannel retailer that operates one online platform and several physical stores. Our study provided insights into a retailer's dynamic fulfillment and transshipment decisions that maximize the retailing system's total profit under uncertainties in customer demand, shipping distances, transshipping costs, cross-channel return rates, etc. More specifically, we addressed the following decisions simultaneously: (i) Order fulfillment: where to fulfill an online order, and (ii) Inventory balancing: when and where to transship items to ensure optimal inventory levels across all locations. We further proposed efficient heuristics to help retailers navigate complex cross-channel fulfillment and transshipment decisions while providing robust performance under various retailing options and scenarios.
In the second step, we integrate the retailer’s strategic and tactical decision-making processes by developing a two-stage stochastic programming model. In this model, the retailer simultaneously makes decisions on inventory allocation, fulfillment, and transshipment. Unlike the first chapter, we focus on developing long-term policies by accounting for a broader range of uncertainties through multiple scenarios. Additionally, we evaluate the value of omnichannel operations by comparing our model with independent-channel operations and other commonly used benchmark policies.
Then, to optimize the performance of urban logistics, we build a capacity allocation model to study the different uses of curb space in the urban transportation system. We consider the interaction between curb space and traffic flow, which are the two essential elements of the transportation system that interact with each other and affect the overall system performance. We first build an open migration network to understand the flow of the vehicles by considering the various uses of the curb space (i.e., parking, pickup/drop-off, and loading/unloading). We then formulate the allocation of capacity needed for various uses with a news-vendor model where our objective is to maximize the profit of the cities. We derive optimal capacity allocation policies and implement numerical experiments. With the model developed, capacity allocation decisions for various curb uses can be made more systematically, improving the overall traffic system.
In conclusion, this dissertation presents a comprehensive set of operations management strategies designed to optimize the efficiency and performance of complex supply chains and urban logistics. The proposed methods have been validated through numerical experiments as both efficient and practical. The insights and techniques developed in this dissertation hold significant promise for a wide range of applications, positioning them as valuable tools for enhancing supply chain management and urban logistics planning.PhDCollege of Engineering & Computer ScienceUniversity of Michigan-Dearbornhttp://deepblue.lib.umich.edu/bitstream/2027.42/197378/1/Yuchi_Guo_Rackham_Dissertations_4_30.pdff8405f0d-6e0a-4b63-83ba-7887953c9151Description of Yuchi_Guo_Rackham_Dissertations_4_30.pdf : Dissertatio
Selected Tales from Georgia Indian Tribes with Suggested Application in Junior High School English and Social Studies Curricula
No full textAfter finding several references which suggest that there was a need to include Native American Studies in schools, the author of this report decided to create, Cherokee, Creek, and Yuchi tales with Suggested Activities ; a resource supplement that would be of help to teachers of junior high school English and/or social studies in Columbus.
The completed resource supplement on Georgia Indian folk-tales include tales from three tribes, Cherokee, Creek, and Yuchi, selected because of their importance and proximity to Columbus. Twenty-three tales were chosen based on criteria established by the author.
The resulting collection of stories and instructional suggestions includes tales, a glossary, goals, objectives, and suggested activities for use with the book. The readability level of all tales was checked using the Fry formula. Afterwards, the included tales were rewritten on a fourth/fifth grade level and reevaluated by the Fry formula. The objectives conform to the cognitive, affective, and psychomotor domains. These activities are not considered to be all-encompassing--they offer a point from which a teacher may begin.
Appendices following the supplement consist of the classification of tales as to tribe, type of tale, and original readability level of each. A list of the sources of the tales follows. Also included in the appendices are maps which show the general area in which the Cherokee and Creek tribes resided and pinpoint specific locations referred to in some of the tales
- …
