delete最新文献 - Book学术

The Balanced Votes Method: A new perspective on symmetry in creating fair redistricting plans and measuring gerrymandering 平衡投票法:在制定公平的重新划分计划和衡量不公正的选区划分中，对称的新视角

delete Pub Date : 2021-08-08 DOI: 10.2139/ssrn.3813521

R. Wallin

{"title":"The Balanced Votes Method: A new perspective on symmetry in creating fair redistricting plans and measuring gerrymandering","authors":"R. Wallin","doi":"10.2139/ssrn.3813521","DOIUrl":"https://doi.org/10.2139/ssrn.3813521","url":null,"abstract":"Last decade’s unprecedented whirlwind of redistricting lawsuits and reforms have fallen behind us as redistricters shift their focus to tomorrow’s elections. This decade’s redistricting plans will be scrutinized more than ever, and the public’s perception of these new plans is vital to their acceptance. This article presents the Balanced Votes (BV) method and the Weighted Districts Method (WDM). The BV method measures the partisan fairness of a redistricting plan and creates ‘dot plots’ which show each district’s benefit/harm in relation to the overall plan. BV dot plots provide comparisons of plans (1) within a state, (2) between states, and (3) between different election cycles. The BV method mathematically derives the cutoff points for packed districts, the value of packed districts, and the value of safe seats. The BV also derives a measure of competitive districts. The BV method accomplishes this by evaluating a redistricting plan from its two independent symmetry points: the statewide vote share, and the fifty-percent winner’s threshold. To aid the general public, this article derives a user-friendly approximation to the BV method, the Weighted Districts Method (WDM). Since WDM dot plots are easy to interpret, they provide a conduit for conversation between redistricters and constituents, or justices as the case may be. The WDM dot plots can be created and evaluated by any citizen using only a pen and a blank WDM weighting function (supplied in the appendix). Most importantly, the BV and WDM methods measure districts, not seats. ","PeriodicalId":11044,"journal":{"name":"delete","volume":"09 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75032752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An in Vitro Study to Evaluate and Compare the Remineralizing Potential among Casein Phosphopeptide-Amorphous Calcium Phosphate (CPP-ACP) with Fluoride and Surface Pre-Reacted Glass (S-PRG) Fillers Using Quantitative Analysis. 酪蛋白磷酸肽-无定形磷酸钙(CPP-ACP)与氟化物和表面预反应玻璃(S-PRG)填料再矿化电位的体外定量比较研究

delete Pub Date : 2021-08-01 DOI: 10.37983/ijdm.2021.3301

Shabista Jabi, Swati Dwivedi, V. Upadhyay, A. Abdullah, Mohammad Sarfaraj, Ankur Mishra

{"title":"An in Vitro Study to Evaluate and Compare the Remineralizing Potential among Casein Phosphopeptide-Amorphous Calcium Phosphate (CPP-ACP) with Fluoride and Surface Pre-Reacted Glass (S-PRG) Fillers Using Quantitative Analysis.","authors":"Shabista Jabi, Swati Dwivedi, V. Upadhyay, A. Abdullah, Mohammad Sarfaraj, Ankur Mishra","doi":"10.37983/ijdm.2021.3301","DOIUrl":"https://doi.org/10.37983/ijdm.2021.3301","url":null,"abstract":"Background- Early treatment of white spot lesions is essential to prevent the progression of the lesion. Aim - To evaluate and compare the remineralizing potential of CPP-ACP with fluoride (Casein Phospho Peptide-Amorphous Calcium Phosphate) and S-PRG fillers (Surface Pre reacted glass fillers) using atomic absorption spectroscopy and colorimetric method. Materials and methods- Forty sound human premolars were used in this study. They were divided into two groups (A & B), consisting of 20 samples in each. White spot lesions (WSLs) were established on the window (4x4 mm2) created on the buccal surfaces of the samples. Samples in group A were treated with casein phosphopeptide amorphous calcium phosphate (CPP-ACP) with fluoride, those of group B were treated with S-PRG Fillers. The sample teeth were immersed in a demineralizing solution for 4 days. All the samples were subjected to loss of mineral content (wt %), i.e., calcium, using atomic absorption spectroscopy and phosphorus using the colorimetric method. Results- Statistical analysis was performed using one?way analysis of variance, Tukey’s and paired t-tests. Group A exhibited the highest remineralizing potential, followed by Group B. Statistically, a significant difference (p=0.001) was observed between the two groups. Conclusion- There was a significant difference in remineralizing potential of CPP-ACP with fluoride and S-PRG Fillers. CPP-ACP with fluoride appears to be an effective technique in the remineralization of white spot lesions.","PeriodicalId":11044,"journal":{"name":"delete","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83425223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sport Sponsorship Announcement and Stock Returns: A Meta-Analytic Review 体育赞助公告与股票回报:一项元分析回顾

delete Pub Date : 2020-12-17 DOI: 10.2139/ssrn.3751134

Youngbum Kwon, T. Bettina Cornwell

{"title":"Sport Sponsorship Announcement and Stock Returns: A Meta-Analytic Review","authors":"Youngbum Kwon, T. Bettina Cornwell","doi":"10.2139/ssrn.3751134","DOIUrl":"https://doi.org/10.2139/ssrn.3751134","url":null,"abstract":"PurposeGiven the public availability of secondary data on investments in events such as the Olympics, FIFA World Cup and professional sports, event studies that measure stock market response to these investments have grown. Previous findings are mixed, however, with some studies suggesting that the announcement of sponsorship contracts is a positive event and others finding detrimental effects of the announcement on shareholder value. This study aims to analyze the mixed findings from event studies in sport sponsorship to determine if sponsorship announcements influence stock market response.Design/methodology/approachThe meta-analysis examines more than 20 years of research on event studies in sponsorship (34 studies).FindingsThe overall results show a positive, but non-significant effect of partnership deal announcements on shareholder wealth. Further analysis considers the effects of sponsorship announcements by each type of event window to see the impact of the announcement relative to time (pre-announcement, announcement day, post-announcement and pre- to post-announcement). This closer examination of the event window shows that stock prices of sponsoring organizations increased in the pre-announcement window.Originality/valueQuantitative meta-analytic findings indicate that information about sponsorship deals appears to leak to share markets and positively influence share price. This finding suggests that sponsoring the sports and events found in these event studies is seen as value enhancing for sponsoring firms.","PeriodicalId":11044,"journal":{"name":"delete","volume":"191 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74741588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

How Shifting from In-Person to Virtual-Only Shareholder Meetings Affects Shareholders’ Voice 从面对面的股东大会到虚拟的股东大会如何影响股东的声音

delete Pub Date : 2020-08-16 DOI: 10.2139/ssrn.3674998

Miriam Schwartz-Ziv

{"title":"How Shifting from In-Person to Virtual-Only Shareholder Meetings Affects Shareholders’ Voice","authors":"Miriam Schwartz-Ziv","doi":"10.2139/ssrn.3674998","DOIUrl":"https://doi.org/10.2139/ssrn.3674998","url":null,"abstract":"Shareholder meetings are one of the only opportunities for most investors to interact directly with management. Due to COVID-19, however, shareholder meetings have moved to a virtual format. Analysis of transcripts and recordings of in-person and virtual shareholder meetings in 2019–2020 shows that, relative to in-person meetings, the overall time of virtual meetings is 18% shorter, and 29% less time is spent by firms on answering each question. These findings indicate that communication between companies and shareholders is more limited at virtual meetings. To examine if shareholders face challenges in their attempts to increase such communication in virtual meetings, I construct a dataset on shareholders’ attempts to submit questions to virtual shareholder meetings and document several tactics firms use to avoid addressing them. For example, firms explicitly state that no (additional) questions were submitted, whereas I document that multiple questions were submitted by shareholders, but were ignored. Finally, a mechanism that imposes severe restrictions on shareholders’ ability to submit questions at virtual shareholder meetings is uncovered: the use of a non-Broadridge platform to broadcast the meeting. Overall, the paper documents that with regard to 55% of the firms to which shareholders attempted to submit questions, shareholders faced obstacles. The paper concludes with policy recommendations on how virtual shareholder meetings can be designed in ways that foster communication between management and companies. \u0000 \u0000Presentation of paper is available at this link: \u0000https://www.youtube.com/watch?v=vjp6VcISqDE&feature=youtu.be","PeriodicalId":11044,"journal":{"name":"delete","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74714947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Did Everything Change After 911? Not Everything! 911事件后一切都变了吗?不是一切!

delete Pub Date : 2019-08-17 DOI: 10.2139/ssrn.3438836

Markham Ball

引用次数: 0

Online Smart Ration Card System with Multifactor Authentication 具有多因素认证的在线智能配给卡系统

delete Pub Date : 2019-05-17 DOI: 10.2139/ssrn.3418501

Bharati Kamble, N. Dambe, S. Kulkarni, Gauri R Virkar

{"title":"Online Smart Ration Card System with Multifactor Authentication","authors":"Bharati Kamble, N. Dambe, S. Kulkarni, Gauri R Virkar","doi":"10.2139/ssrn.3418501","DOIUrl":"https://doi.org/10.2139/ssrn.3418501","url":null,"abstract":"In this paper, the online smart ration card system with multifactor authentication techniques has been proposed to prevent from ration forgery. Multiple factors like biometric (fingerprint technique), Radio Frequency Identification (RFID), color code sequences and SMS entry way are used to keep the ration fraud. In this framework, a RFID tag is utilized that conveys relative points of interest and the client needs to show this tag at the ration shop or at his/her place before getting the ration. The user will need to give thumb impression on the biometric machine to verify if user is authentic or not. Additionally, before placing an order the user has to provide preferences of color code sequences as provided by the user during registration. Thus, the user ‘s authenticity is verified using multiple factors thereby increasing the security of the overall system. Apart from traditional approach of visiting and then collecting the ration, a novel approach has been introduced here where the authenticated user can demand the ration online and receive it at their specified location(Eg: Home address). In this paper, we present a brief introduction to Ration Distribution system using Smart card with increased usability and security of the overall system.","PeriodicalId":11044,"journal":{"name":"delete","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90702119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Social Trading at a Glance - A Performance Analysis of Signal Providers 社会交易的一瞥-表现分析的信号提供者

delete Pub Date : 2019-05-01 DOI: 10.2139/ssrn.3410534

Alexander Deneke

引用次数: 1

Imitation in the Imitation Game 模仿游戏中的模仿

delete Pub Date : 2017-10-10 DOI: 10.2139/ssrn.3049897

R. Kashyap

引用次数: 3

Assessment of Proxy-Hedging in Jet-Fuel Markets 航空燃油市场代理套期保值评估

delete Pub Date : 2017-10-08 DOI: 10.2139/ssrn.3049564

Marius-Cristian Frunza, D. Guégan, Rostislav Haliplii

引用次数: 1

Implied Volatility and Stock Market Speculation 隐含波动率与股票市场投机

delete Pub Date : 2017-09-21 DOI: 10.2139/ssrn.3040470

Ramesh Thimmaraya, Venkateshwarlu Masuna

{"title":"Implied Volatility and Stock Market Speculation","authors":"Ramesh Thimmaraya, Venkateshwarlu Masuna","doi":"10.2139/ssrn.3040470","DOIUrl":"https://doi.org/10.2139/ssrn.3040470","url":null,"abstract":"The stability of an economy is directly linked to the stability of the capital markets in which it operates and vice versa. The capital market stability is in turn linked to the asset price dynamics; most of these asset prices are modelled based on expected rate of return. The expected rate of return and direction of markets is determined from the implied market volatility (VIX index). The implied volatility is a forward looking variable which tells about the realised market volatility based of market participant’s expectations. Most of the times this implied volatility is over estimated compared to the realised volatility due to the speculative behaviour of the market participants. This speculative behaviour causes virtual dynamics in the implied variables which in turn caused virtual dynamics in the individual asset prices. The virtual dynamics in the asset prices causes the divergence in the realised or fundamental value of the market; which can be attributed to the irrational behavioural of the financial market participants. The present paper aims at understanding the source and level of the speculation, and also an attempt has been made to develop a novel quantitative behavioral framework to understand and rectify this speculative behaviour. An empirical analysis has been carried out on the S&P 500 Index and CBOE VIX Index to validate the proposed model. Some interesting results have been obtained from the present study which clearly shows the quantitative behavioural model has the capability to convergence the expected volatility with the realised market volatility, this helps the market participants, regulators and policy makers to make necessary corrections based on the predicted speculation.","PeriodicalId":11044,"journal":{"name":"delete","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81134361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0