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Kyojik “Roy” Song 한국재무학회 2020 한국재무학회 학술대회 Vol.2020 No.11
Using the sample of US industrial firms over the period of 2000-2017, we find that firms tend to issue more debt after the global financial crisis to take advantage of lower borrowing rates and specifically, BBB-rated firms increase debt issuance more than other firms. We also document that the BBB-rated firms build up cash and increase payout ratios using the proceeds from the issuance in the post-crisis period. However, they tend not to increase R&D expenses or capital expenditures following the debt issuance. We further find that the market value of cash for BBB-rated firms is decreasing in the post-crisis period as they increase cash holdings, while that for other investmentgrade firms does not change. These results are consistent with the view of agency costs.
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[특집] 동북아의 변화하는 전략 환경과 한미관계의 미래
J.Stapleton Roy(J.Stapleton Roy) 한국전략문제연구소 2001 전략연구 Vol.8 No.3
One of the most positive aspects of the post Cold War period is that trends on the Korean peninsula during the 1990s have made it possible for the first time since World War II realistically to contemplate the emergence of a unified Korea within a foreseeable time frame. This is a remarkable development that would have been unthinkable a few years earlier. Nevertheless, realistic observers recognize that there are still formidable obstacles hindering progress toward the goal of a unified Korea. Foremost among these is the nature of the regime in the Democratic People's Republic of Korea (DPRK). Moreover, while the progress achieved in establishing a productive dialogue between the Republic of Korea and the DPRK, and in improving communications between the United States and North Korea, is highly significant, it has not yet resulted in a significant lowering of the military posture along the demilitarized zone dividing North and South Korea. As long as these circumstances remain unchanged, progress toward Korean unification will face many impediments, and the process is likely to be prolonged and difficult. There are, therefore, sound reasons to begin considering the nature of the security arrangements for the Korean peninsula that will be needed if and when Korean unification occurs. Factors that need to be addressed include whether or not there will be a need for modifications to the U.S.-ROK alliance; the size, role, and functions of U.S. forces in Korea; the likely responses of other major powers; and the agenda items that should be addressed in U.S.-ROK consultations. This paper is intended to make a modest contribution to this process. Korean unification will both be influenced by and have a profound impact on the strategic environment of Northeast Asia. The geopolitical characteristics of this region have no parallel elsewhere in the world. The Korean peninsula lies at the intersection of three great powers - China, Japan, and Russia - and for much of the last century the United States has been a major factor in the balance of power in Northeast Asia as well. In the space of barely two decades, there was a dramatic transformation of great power relationships in East Asia that made it possible to think seriously about Korean unification as an achievable goal. The United States has had a long-standing interest in lowering tensions on the Korean peninsula and preventing the emergence of security threats. Because of their common interests in this regard, the United States has maintained close ties with the ROK for a half century and would wish these to continue even under the altered circumstances that would result from Korean unification. Realistically speaking, however, the United States will face difficult adjustments in its security posture that it will wish to consider carefully. The United States will need to assess developments from the standpoint of the overall power balance in Asia. In particular, the United States will give special attention to ensuring that Korean unification does not adversely affect the ability of the United States to continue to playa stabilizing role in the region. All four can be profoundly affected by the manner in which Korean unification occurs, and each will wish to see its interests accommodated to the maximum extent possible. Clearly, the process of unification will be greatly facilitated if relations among the major affected powers are harmonious. This cannot be taken for granted. Accordingly, undue pessimism is no more justified than naive optimism in assessing whether great power relationships will facilitate or hinder progress toward unification on the Korean peninsula. Expecially, if not managed carefully, Korean unification could have a profound impact on Sino-U.S. relations. The impact of Korean unification on Sino-U.S. relations would depend on the process by which unification was achieved.
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Roy, Abhishikta Ghosh,Sarkar, B.N.,Roy, Rakesh,Rao, V.R.,Bandyopadhyay, A.R. Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.9
Background: The high incidence and relatively good prognosis of breast cancer has made it the most prevalent cancer in the world today. A large number of distinct mutations and polymorphisms in the p53 gene have been reported worldwide, but there is no report regarding the role of this inherited susceptibility gene in breast cancer risk among the Bengalee Hindu Caste females of West Bengal, India. Aim of the Study: We investigated the distribution and the nature of p53 gene mutations and polymorphisms in exons 5-7 in a cohort of 110 Bengalee Hindu breast cancer patients and 127 age, sex and caste matched controls by direct sequencing. Results: We did not observe any mutations and polymorphisms in our studied individuals. Conclusion: We therefore conclude that mutations in exons 5-7 of p53 gene are rare causes of breast cancer among Bengalee Hindu caste females, and therefore of little help for genetic counseling and diagnostic purposes.
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( Siddhartha Roy ),( Saptarshi Roy ),( Arpita Biswas ),( Krishna Lal Baishnab ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.11
In this fast-paced technological world, the Internet of Things is a ground breaking technology which finds an immense role in the present electronic world which includes different embedded sensors, devices and most other things which are connected to the Internet. The IoT devices are designed in a way that it helps to collect various forms of data from varied sources and transmit them in digitalized form. In modern era of IoT technology data security is a trending issue which greatly affects the confidentiality of important information. Keeping the issue in mind a novel light encryption strategy known as LCB is designed for IoT devices for optimal security. LCB exploits the benefits of Feistel structure and the architectural benefits of substitution permutation network both to give more security. Moreover, this newly designed technique is tested on (Virtex-7) XC7VX330T FPGA board and it takes much little area of 224 GE (Gate Equivalent) and is extremely fast with very less combinational path delay of 0.877 ns. An in-depth screening confirms the proposed work to promise more security to counter cryptographic attacks. Lastly the Avalanche Effect (AE) of LCB showed as 63.125% and 63.875% when key and plaintext (PT) are taken into consideration respectively.
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Cloud-Enabled Data Center Organization using K-D Tree
Sandip Roy,Rajesh Bose,Tanaya Roy,Debabrata Sarddar 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.3
An efficient load balancing algorithm in the field of cloud computing is absolutely essential in order to have a cloud network with graceful performance satisfying user expectation. Inspite of the existence of handful lightly loaded data centers, numerous heavily overloaded data centers may lead to a performance degradation of overall cloud network. Proper workload distribution may improve the overall performance of the cloud system. Now a day’s eminent cloud division rules are highly demanding algorithm for distributing workloads among various cloud server nodes deployed in cloud-enabled data centers scattered over the geographical regions. For the researcher, cloud division rule and optimal cloud server node searching are the most demanding jobs in load balancing leading towards more efficient cloud network and improve users’ satisfaction. This paper presents an expeditious cloud division rule based on geographical location of the cloud-enabled data centers distributed over earth surface and builds a two-dimensional space partition k-d tree to partition them in order to search intended cloud server node efficiently. Our proposed organization scheme can be utilized for active monitoring load balancing algorithm to improve the resource utilization for high performance in present cloud computing environment.
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