• Title/Summary/Keyword: Empirical studies

Search Result 3,741, Processing Time 0.031 seconds

Radiographic Evaluation of Small Intestinal Diameter in Small Breed Dogs (소형견에서 소장 직경의 방사선학적 평가)

  • Choi, Ho-Jung;Kim, Soo-Chan;Lee, Young-Won
    • Journal of Veterinary Clinics
    • /
    • v.29 no.4
    • /
    • pp.301-305
    • /
    • 2012
  • The purpose of the present study was to prove our empirical tendency of relatively high small intestinal diameter (SI) to fifth lumbar vertebral height (L5) ratio, which has been used in dogs. In this study, the ratio of SI/L5 was determined in small breed dogs weighing less than 5 kg. In addition, the effect of large volume of contrast media on the intestinal dilation was determined by performing upper gastrointestinal contrast study. Abdominal radiography and upper gastrointestinal series were performed in twelve healthy dogs weighing less than 5 kg. Small intestinal diameter (SI), fifth lumbar vertebral height (L5), and twelfth rib diameter were measured on abdominal radiographs. The range of values of SI/L5 is from 1.03 to 2.26 in plain radiography, and from 1.55 to 2.5 in contrast studies. Contrast agent significantly increased small intestinal diameter, and could be considered as mildly dilated intestinal model. Therefore, a value of 2.1 for SI/L5 is recommended as the upper limit of the normal range suggesting nonobstructive intestinal dilation.

Empirical Analysis of Political Communication Mode at Cyberspace (사이버 공간에서의 정치 커뮤니케이션 양식 분석 연구 : 제16대 공선 후보자 사이버 게시판 분석을 중심으로)

  • Hwang, Geun
    • Korean journal of communication and information
    • /
    • v.16
    • /
    • pp.207-254
    • /
    • 2001
  • This study is focused on forecasting the future of tole-democracy. Many Scholars expect that internet provides technological space needing realizing the tole-democracy or deliberate democracy. Especially in Korea, this expectation is higher than other nations because of political corruption and inefficiency. Therefore internet is intended to considering as new technologies reforming political process. In 16th the general election period, many candidates established home page and used as election campaign tool. And a little of home pages is payed attention to among voters. In spite of using internet as political medium, many political communication researchers have a doubt that internet will realize ideal direct democracy. It's reason is that internet is open and anonymous space. At anonymous space, communication participators is tended to be irresponsible and non-serious. Therefore it is hard that cyber-politics will be ideal type of democracy. In this context, this paper analyzed how pauicipators communicate with others at cyber bulletin board establishing candidate's home pages. Main research questions is how do discussions at cyberspace fulfill the conditions of deliberate democracy. Therefore, concrete questions include; who are participators at candidate's cyber bulletin board; which pattern do they communicate; what is the theme of communication; which effects do the anonymous character of cyberspace influence. To that purpose, this study conducted content analysis on 4,210 written matters at 82 cyber bulletin boards of candidate's home page establishing during 16th the general election period. It can be found that cyberspace in Korea still is not deliberate democracy space and not will be. Firstly, discussion patterns at cyber bulletin board is "candidate with supporters communication space. To be exact, it is said that candidate's home page is "the space of self-convincing among supporters." Secondly, the main themes of discussion are simple emotional expressions; "I support you!" "fighting" "Be vigor" etc. By contrast, real political contents'-central or local political matters - is relatively few. In the mode of expression, real political messages are more positive, logical than simple expressions, candidates private matters. Especially this characteristic will make cyberspace as "mutual slander space" consolidating anonymous characteristic of cyberspace. finally, Cyberspace in Korea still is not real "public sphere" realizing deliberate process. Therefore to be real public sphere, it is needed to participant's ethical maturity and political citizenship. In conclusion, it is difficult that cyberspace will reconstruct the Athene's Agora. On the contrary, Cyberagora will like to be irrespectable area fulfilling the sweeping. Making the deliberate space, technological possibility and ethical condition will have to be balanced together.

  • PDF

Internet News Frame: A Study of News Coverage Trends in Longitudinal Internet Media Development (인터넷 뉴스프라임: 인터넷 미디어발달의 장기적인 뉴스보도 경향연구)

  • Kweon, Sang-Hee
    • Korean journal of communication and information
    • /
    • v.30
    • /
    • pp.35-87
    • /
    • 2005
  • This research explores the empirical confirmation of the Internet development including from the period of innovation to the time of social-cultural use in today. The research focused on how tradition news media rover about the Internet developed from early to today, and understanding the media characteristics on the each stages from news frame. The research Is designed to conduit content analysis from 1989 to 2004, then this research is divided four(4) stages of the Internet development: innovation, diffusion, commercial usage, social-cultural usage. The results shows that there are significant different coverage by the stages. First of all, the news coverage pattern shift from technology focused on early stages to social usage focused on the later stages. This research confirms that the ratio of the seriation(technology) coverage defined when social usage is increased, on the other hand skeumorphs(social usage and content) coverage is increased in the commercial and social usage stages. This coverage pattern among news media does not such a big different and there is no competitive coverage. Moreover, the news coverage shifted from thematic coverage on early stages to episodic coverage while the number of usage increasing. In addition, the tone of coverage has not been changed significantly.

  • PDF

An Empirical Study on Linux I/O stack for the Lifetime of SSD Perspective (SSD 수명 관점에서 리눅스 I/O 스택에 대한 실험적 분석)

  • Jeong, Nam Ki;Han, Tae Hee
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.52 no.9
    • /
    • pp.54-62
    • /
    • 2015
  • Although NAND flash-based SSD (Solid-State Drive) provides superior performance in comparison to HDD (Hard Disk Drive), it has a major drawback in write endurance. As a result, the lifetime of SSD is determined by the workload and thus it becomes a big challenge in current technology trend of such as the shifting from SLC (Single Level Cell) to MLC (Multi Level cell) and even TLC (Triple Level Cell). Most previous studies have dealt with wear-leveling or improving SSD lifetime regarding hardware architecture. In this paper, we propose the optimal configuration of host I/O stack focusing on file system, I/O scheduler, and link power management using JEDEC enterprise workloads in terms of WAF (Write Amplification Factor) which represents the efficiency perspective of SSD life time especially for host write processing into flash memory. Experimental analysis shows that the optimum configuration of I/O stack for the perspective of SSD lifetime is MinPower-Dead-XFS which prolongs the lifetime of SSD approximately 2.6 times in comparison with MaxPower-Cfq-Ext4, the best performance combination. Though the performance was reduced by 13%, this contributions demonstrates a considerable aspect of SSD lifetime in relation to I/O stack optimization.

Frontier Capitalism in the Lao PDR Versus Patrimonial Oligarchy in Cambodia (라오스의 변경 자본주의 대(대) 캄보디아의 세습 과두제)

  • Andriesse, Edo
    • Journal of the Economic Geographical Society of Korea
    • /
    • v.16 no.3
    • /
    • pp.408-422
    • /
    • 2013
  • This paper builds on recent scholarly endeavours to establish a body of knowledge on Varieties of Asian Capitalism/Asian Business Systems. The forthcoming Oxford handbook of Asian business systems systematically compares institutional capitalist arrangements across Asia including Laos, yet there is no chapter on Cambodia. The objective of this paper is to compare the Lao and Cambodian varieties of Asian capitalism, with special reference to the role of the state and the economic geography of both countries. Accordingly, it seeks answers to the questions as to how territory has become a key arena for re-organising economic power and how the Lao and Cambodian state themselves are being transformed through state capitalism and the Beijing-Seoul-Tokyo Consensus. A comparative analysis reveals a difference between state-coordinated frontier capitalism in Laos versus patrimonial oligarchy in Cambodia. Interdependencies between the market and the state in Laos display the state as active and interventionist. In some provinces the central government leaves decision making to provincial elites contributing to the emergence of other distinctive regional varieties of capitalism. The rising spatially less selective oligarchs in Cambodia focus relatively more on markets, but are certainly not seeking free markets with equal entry opportunities. The findings offer interesting possibilities for further research on the spaces of Asian capitalism, both from an empirical and theoretical perspective. More work should be done to accommodate the role of small and medium enterprises and theories need to better integrate oligarchic, personal and familial capitalism. Finally, comparative corridor studies in Laos could lead to better insights into the nature of regional varieties of capitalism.

  • PDF

One-key Keyboard: A Very Small QWERTY Keyboard Supporting Text Entry for Wearable Computing (원키 키보드: 웨어러블 컴퓨팅 환경에서 문자입력을 지원하는 초소형 QWERTY 키보드)

  • Lee, Woo-Hun;Sohn, Min-Jung
    • Journal of the HCI Society of Korea
    • /
    • v.1 no.1
    • /
    • pp.21-28
    • /
    • 2006
  • Most of the commercialized wearable text input devices are wrist-worn keyboards that have adopted the minimization method of reducing keys. Generally, a drastic key reduction in order to achieve sufficient wearability increases KSPC(Keystrokes per Character), decreases text entry performance, and requires additional effort to learn a new typing method. We are faced with wearability-usability tradeoff problems in designing a good wearable keyboard. To address this problem, we introduced a new keyboard minimization method of reducing key pitch. From a series of empirical studies, we found the potential of a new method which has a keyboard with a 7mm key pitch, good wearability and social acceptance in terms of physical form factors, and allows users to type 15.0WPM in 3 session trials. However, participants point out that a lack of passive haptic feedback in keying action and visual feedback on users' input deteriorate the text entry performance. We have developed the One-key Keyboard that addresses this problem. The traditional desktop keyboard has one key per character, but the One-key Keyboard has only one key ($70mm{\times}35mm$) on which a 10*5 QWERTY key array is printed. The One-key Keyboard detects the position of the fingertip at the time of the keying event and figures out the character entered. We conducted a text entry performance test comprised of 5 sessions. The participants typed 18.9WPM with a 6.7% error rate over all sessions and achieved up to 24.5WPM. From the experiment's results, the One-key Keyboard was evaluated as a potential text input device for wearable computing, balancing wearability, social acceptance, input speed, and learnability.

  • PDF

A Study on the Reasonable Application Method of Steel Fiber Reinforced Shotcrete in NATM Tunnel (NATM 터널에서 합리적인 강섬유보강 숏크리트 적용방안에 관한 연구)

  • Seok, Chongken;Ahn, Taebong
    • Journal of the Korean GEO-environmental Society
    • /
    • v.15 no.9
    • /
    • pp.19-28
    • /
    • 2014
  • Recently, the proportion of long tunnel has increased for efficient use of land due to limited land area, driving convenience and high speed. RMR and Q-System of empirical methods has been mainly used for tunnel support design in domestic. Although shotcrete is the key to NATM tunnel, the related studies are insufficient. So, steel fiber reinforced shotcrete is applied to II~V grade rocks on domestic and foreign applications. And same amount of shotcrete is equally applied to tunnel roof and wall regardless of the applied rock load. Shotcrete is applied excessively rather than the original proposed value of RMR and Q-System. Thus, this study is to reevaluate the application part of plain shotcrete and steel fiber reinforced shotcrete of tunnel in Daebo granite, and to propose the reasonable application method of steel fiber reinforced shotcrete. Field test and numerical back analysis using measurements were performed to verify stability. According to results, if RMR values are the upper class in the III grade, it can be designed in accordance with upper grade. In addition, if rock condition is good as a mountain tunnel in Daebo granite, it can be applied for plain shotcrete to III grade rocks because there is also no stability problems. And although steel fiber reinforced shotcrete is applied only crown of the tunnel in IV grade rocks, it is possible to secure stability for falling rock by key-block.

Behaviour of Reinforced Earth Wall with Steel Framed-Facing based on Field Test (현장시험을 이용한 강재틀 보강토옹벽의 안정성 평가)

  • Lee, Kwang-Wu;Cho, Sam-Deok;Han, Jung-Geun;Hong, Ki-Kwon
    • Journal of the Korean Geosynthetics Society
    • /
    • v.10 no.4
    • /
    • pp.37-47
    • /
    • 2011
  • This paper describes the stability evaluation of reinforced earth wall with steel framed-facing based on field test. The reinforced earth wall with steel framed-facing is composed of wall facing, reinforcement and backfill soil. The wall facing is assembled by steel frames and the aggregates are filled in that. The reinforcement is steel strip type based on bearing resistance. Field test is conducted to evaluate for two separate sections and the measurement is conducted according to construction elapsed time of structure for earth pressure, horizontal displacement of wall facing and reinforcement strain. The evaluation results show that the measured earth pressure is less than theoretical earth pressure due to dispersion effect of earth pressure by the applied reinforcement. Also, the horizontal displacement of wall facing satisfied a empirical criteria and the measured strain of reinforcement had nearly no effect on stability of structure. Therefore, the reinforced earth wall with steel framed-facing has a structural stability and it can be commonly used in field.

The Impact of Industry-Academy Collaborations and Absorptive Capacity on Technological Performance in Korean SMEs (산학연 기술협력과 흡수 능력이 중소기업의 기술혁신성과에 미치는 영향)

  • Kim, Sun-Young;Lee, Byung-Heon
    • 한국벤처창업학회:학술대회논문집
    • /
    • 2007.04a
    • /
    • pp.35-64
    • /
    • 2007
  • Despite the tremendous efforts to boost them, domestic SMEs lack competitive power and it intensifies bipolarization between the conglomerates and SMEs. Furthermore, degree of industry-academy collaboration still falls far behind of that of developed countries even with government' s various policies and continuous increase in investment to strengthen the SMEs' technology innovation capability. Although many internal factors are suggested to affect technological performance, focus of existing studies has been restricted to immediate impact of industry-academy collaboration on technology innovation and it is not known how internal factors are related. This research conducts empirical analysis on the impact of industry-academy collaborations and absorptive capacity on technological performance in Korean SMEs. Sample frame is SMEs with more than five employees located in the nation wide industrial complex and 1,077 questionnaires are collected with the help of Korea Industrial Complex Corporations. 940 sample data excluding those with insufficient response are used in analysis. Multiple regression analysis revealed that the industry-academy collaborations and innovative HRM system, on important dimension of absorptive capacity, are positively correlated to technological performance. Furthermore, there exists a positive interaction effect between industry-academy collaborations and innovative HRM system. These findings make contributions to the formation of SME innovation policy and management. When funding industry-academy collaborations, government should consider SMEs' internal effort for innovation, that is, the possession of innovative HRM system, as well as firm's technology capability. Also, as technological performance cannot be achieved simply with R&D investment, both quantitative and qualitative assessment of SMEs' technological capability should be done to evaluate the candidate SMEs. As for management, it is important for SMEs with limited internal resources and capabilities to fully employ external resources to achieve higher technological performance. The development of innovative HRM system will be particularly helpful not only for internal R&D, but also for adoption of technology and knowledge from outside.

  • PDF

An Empirical Study on the Effects of e-Mail Marketing : A focus on e-Mail Campaign for Credit Card Consumers (이메일 마케팅 성과에 관한 연구: 신용카드 고객을 대상으로 한 캠페인을 중심으로)

  • Shin, Sung-Hoon;Chung, Soo-Yeon;Park, Cheol
    • Information Systems Review
    • /
    • v.11 no.1
    • /
    • pp.49-67
    • /
    • 2009
  • E-mail marketing is the cheapest channel in target marketing. The channel works amazingly well for marketers who know how to use it. The e-mail marketers are able to integrate transactional and behavioral data to improve the targeting content of e-mail marketing campaigns. The cost in e-mail marketing is low and e-mail marketing makes no pollution. But, the e-mail response rate is lower than all the other channels. So, it is very hard for companies to increase their sales volumes, though the companies are ready to execute e-mail marketing campaigns on the side of computer systems. Marketers can send messages easily to target customers compared to other channels. But, the possibility to be read by the customers is low. Normal e-mails are continually devalued by spam mails. This study shows the influence of e-mail marketing to increase sales used by credit cards, on the basis of the real data promoted by A bank, in the Republic of Korea. The analysis on the traits of the respondent can help marketers to target customers. If additional studies on the response prediction model on the basis of traits of potential respondents are done, the targeting method to increase the effectiveness of e-mail marketing will be better structured and organized.