• Title/Summary/Keyword: research hypothesis

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Sequential Hypothesis Testing based Polling Interval Adaptation in Wireless Sensor Networks for IoT Applications

  • Lee, Sungryoul
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.3
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    • pp.1393-1405
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    • 2017
  • It is well known that duty-cycling control by dynamically adjusting the polling interval according to the traffic loads can effectively achieve power saving in wireless sensor networks. Thus, there has been a significant research effort in developing polling interval adaptation schemes. Especially, Dynamic Low Power Listening (DLPL) scheme is one of the most widely adopted open-looping polling interval adaptation techniques in wireless sensor networks. In DLPL scheme, if consecutive idle (busy) samplings reach a given fixed threshold, the polling interval is increased (decreased). However, due to the trial-and-error based approach, it may significantly deteriorate the system performance depending on given threshold parameters. In this paper, we propose a novel DLPL scheme, called SDL (Sequential hypothesis testing based Dynamic LPL), which employs sequential hypothesis testing to decide whether to change the polling interval conforming to various traffic conditions. Simulation results show that SDL achieves substantial power saving over state-of-the-art DLPL schemes.

Individual Human Recognition of Wild Animals: A Review and a Case Study in the Arctic Environment

  • Lee, Won Young;Choe, Jae Chun
    • Proceedings of the National Institute of Ecology of the Republic of Korea
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    • v.1 no.1
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    • pp.1-8
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    • 2020
  • Recent studies revealed that many animals identify individual humans. In this account, we review previous literatures on individual human recognition by wild or domestic animals and discuss the three hypotheses: "high cognitive abilities" hypothesis, "close human contact" and "pre-exposure to stimuli" hypothesis. The three hypotheses are not mutually exclusive. Close human contact hypothesis is an ultimate explanation for adaptive benefits whereas high cognitive abilities and pre-exposure to stimuli hypothesis are proximate explanations for mechanisms to perform such discriminatory behaviour. We report a case study of two bird species in a human-free habitat. Long-tailed skuas, which are known for having high cognitive abilities, exhibited the human discriminatory abilities whereas ruddy turnstones did not display such abilities toward approaching humans. This suggests that highly intelligent species may have this type of discriminatory ability so that they could learn to identify individual humans quickly by pre-exposure to stimuli, even in a human-free habitat. Here, we discuss that human recognition is more common in species with rapid learning ability and it could develop for a short period of time between an intelligent species and human.

The Impact of Management's Values on Organizational Performance: Focusing on the Mediating Effect of Value Consistency

  • Kim, Moon Jun
    • International Journal of Advanced Culture Technology
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    • v.7 no.4
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    • pp.76-85
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    • 2019
  • This study examined the mediating effect of management's values on organizational performance and between them. Hypotheses 1, 2, 3, and 4 which were set up to achieve the purpose of this study, were verified as follows. First, Hypothesis 1 proposed that the values of management will have a positive effect on organizational performance. Second, Hypothesis 2 proposed that the values of management are likely to have a positive effect on the consistency of the values of organizational members. Third, Hypothesis 3 proposed that the consistency of the values of organizational members will have a positive (+) influence on organizational performance. We found that the consistency of the values of organizational members has a positive (+) influence on organizational performance. Hypothesis 3 was adopted. Fourth, hypothesis 4, the value consistency of the members of the organization, had a mediating effect between the organization performance on value management. The results of this study were all adopted research hypotheses. Therefore, management's values have a significant impact on the theoretical and practical aspects by showing the relationship between organizational members' value consistency and organizational performance. In the future, the necessity of further research on management's values and member's value consistency through various fields for organizational performance has emerged.

A theoretical study on the forming mechanism of Sasang constitution (사상체질성립기전에 대한 이론적 고찰)

  • Chi, Sang-Eun;Choi, Sun-Mi;Cho, Hwang-Sung
    • Korean Journal of Oriental Medicine
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    • v.4 no.1 s.4
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    • pp.47-62
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    • 1998
  • We explicate the forming mechanism of Sasang constitution as the principle of energy distribution which is based on the evolutionary hypothesis. The result was obtained as follows: 1. The principle of form-image (形象) in oriental medicine can be explained with the relation between structure and function that a life acquires through the adaptation and evolution. 2. The Sung-jung (性情) in Sasang constitutional medicine can be explained as the strategy for survival or the pattern of adaptation by which an individual or a species lives in this world. 3. The forming mechanism of Sasang constitutional organic phase (臟局) can be explained as the principle of energy distribution which includes three hypothesis (hypothesis of limited resources, hypothesis of preference and hypothesis of effectiveness). 4. It is postulated that the local hemodynamics is one of the most important factors that determine the difference of Sasang constitutional organic function. 5. The relation of metabolic rate, local hemodynamics and thermo-metabolism is inseparable and it is the important point of forming mechanism of Sasang constitution and the diagnosis of pulse.

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A Study on the Influence of Organizational Culture and Authentic Leadership on Job Crafting

  • Kim, Moon Jun
    • International Journal of Internet, Broadcasting and Communication
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    • v.13 no.1
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    • pp.123-133
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    • 2021
  • We study confirmed the factors influencing the organizational culture(collective culture, development culture, rational culture, hierarchical culture) perceived by members of the organization and the manager's authentic leadership(self-awareness, balanced information processing, relational transparency, internalized moral perspective) on job crafting. In addition, the relationship between organizational culture and authentic leadership was empirically analyzed. In order to verify the hypothesis of the research model, the survey results of 269 parts were verified as follows using the statistical program of SPSS 24.0. First, the organizational cultures perceived by members of the organization, development culture and rational culture, showed positive (+) influence on job crafting. In other words, Hypothesis 1 established by the research model was partially adopted. Second, the group culture, development culture, and rational culture of organizational culture were statistically significant in the relationship between the hypothesis 2 organizational culture and authentic leadership. In other words, Hypothesis 2 was partially adopted. Third, the three hypotheses of authentic leadership (self-awareness, balanced information processing, relational transparency, and an internalized moral perspective) all showed positive (+) effects on job crafting. As a result of this study, it was possible to confirm the importance of the organizational culture that improves the job-crafting of the members of the organization and the strategic activation plan for authentic leadership. Therefore, the necessity of strategic human resource development for the development and application of programs to revitalize organizational culture and improve the manager's authentic leadership has emerged.

Effects of Consumer's Individual Value on Product Selection Attribute and Re-purchase Intention : Focused on Consumers Who Had Purchased Kimchi

  • KIM, Hey-Sook;SHIN, Choung-Seob;CHOI, Young-Sim
    • East Asian Journal of Business Economics (EAJBE)
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    • v.8 no.4
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    • pp.1-18
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    • 2020
  • Purpose - The current study attempts to reveal the causal relationship and identify the interrelationships among individual value, product selection attribute, and re-purchase intention of consumers when purchasing kimchi. Research design, data, and methodology - The surveys were distributed and retrieved to kimchi consumers in Seoul and Gyeonggi Province who were over 20 years old and who had purchased kimchi before. The current study utilized the self-reporting survey as the research method. Result - First, as a result of hypothesis 1 test, both internal value and external value had a significant effect. Second, as a result of hypothesis 2 test, while internal value had a significant effect, external value did not have a significant effect. Third, as a result of hypothesis 3 test, while internal value had a significant effect, external value did not have a significant effect. Fourth, as a result of hypothesis 4 test, all quality, brand, and price had a significant effect. Fifth, as a result of hypothesis 5 test, while internal value had a significant effect, external value did not have a significant effect. Conclusion - The current study aims to establish marketing and service strategies to maximize profits and secure competitive advantage in the kimchi industry through changes in the management strategy of the Korean kimchi industry.

A Comparative Study on Development of Personality of Child-A center of christian family and non-christian family of child- (아동의 인성발달에 대한 비교연구-기독교가정과 비기독교가정 아동을 중심으로-)

  • 정수자
    • Journal of the Korean Home Economics Association
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    • v.17 no.4
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    • pp.95-106
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    • 1979
  • About a centry passed since christianity had been transmitted to our country. Now that christians outnumbers 5 millions. Christian home education are supposed to have exerted great influenced on the personality nature of children. Therefore, this study is aimed at determing the difference between the christian family and non-christian family in view of the personality development of children. Do it explain in detail : 1. To analize the development of children's personality nature. 2. To know the difference of development of the children's personality nature between christian and non-christian family. 3. To find out an educational means to programs the desirable personality nature of children. This research worker established bypothesis for getting above purpose as follows. Hypothesis A. Is there any difference in the personality development between the children of christian and non-christian family. hypothesis B. Development of personality nature will have a gab according to sex. To this end research worker carried out personality test around 200 persons on 4th grades of primary school. The result is as follows ; Hypothesis A-there will be difference in the personality development between the children of christian family and non christian family. The children of christian family showed higher development of reflectiveness as A, 1 emotional stability and reflectiveness as A , 2, emotional stability as A, 3 then the children of non christian family, and mostly is showed a little of fifference, so this hypothesis was denied. Hypothesis B-there will be difference in the personality development between man's and women's group. In this hypothesis boys chowd higher development of general activity and domonance as B, 1, general activity and dominance and impulsiveness as B, 2, activity and dominance and emotional activity and impulsi veness as B, 3, then girls so this hypothesis was accepted.

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A Study on the Influences of Authenticity of Hwasung-si Baegmi-ri Fishing Village Experience Program and Tourist Experience on Tourist Satisfaction (화성시 백미리 어촌체험마을사업의 고유성과 관광체험이 방문객의 만족에 미치는 영향)

  • Jang, Cheol-Ho;Jang, Young-Soo;Lee, Jung-Phil
    • The Journal of Fisheries Business Administration
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    • v.45 no.2
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    • pp.97-112
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    • 2014
  • This study aimed to redefine the concept of fishing village tourism. In addition, it aimed to carry out detailed analyses of the influences of authenticity and non-authenticity of fishing village experience on tourist's satisfaction as well as the influences of tourist's experience on their satisfaction. The study evaluated responses of people who visited research target fishing villages in the East sea area(Hwasung-si Baegmi-ri) which had been rated as successful case. The evaluation was performed to analyze how tourist satisfaction would be influenced by the authenticity of the fishing village experience program based on the authenticity theory(Wang, 1999) and the experience realms theory(Pine & Gilmore, 1999). This study tried to find out realistic factors of the experience realms theory through field investigation, conducting interviews, and holding discussions. From these, the cause-and-effect structure of authenticity, tourism experience and satisfaction could be identified. The results of hypothesis tests are as follows; With respect to the relationship between authenticity and satisfaction in hypothesis I, authenticity did not have a statistically significant effect on satisfaction, while non-authenticity had a significant influence. As a result, the research hypothesis I that authenticity influences satisfaction was partially supported. Regarding hypothesis II of the link between authenticity and tourism experience, a significant effect of authenticity was found in education experience, entertainment experience for Baegmi-ri village. The effect of non-authenticity was significant on deviation experience. Consequently, hypothesis II was also partly supported. The relationship between tourism experience and satisfaction in hypothesis III was significant in education, entertainment, and deviation experiences which lends support to hypothesis III to some extent.

The Effect of Interleaved-practice by the Discriminative-contrast hypothesis in Mathematics (수학학습에서 구분-대조 가설에 의한 교차연습의 효과)

  • Ryu, Jimin;Park, Mijeong
    • Communications of Mathematical Education
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    • v.37 no.2
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    • pp.199-212
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    • 2023
  • The purpose of this study is to find out whether there is a difference in achievement between blocked practice and interleaved practice according to the difference in domain and type of learning content in mathematics subject, and through this result, it is to confirm whether the effect of interleaved practice in mathematics learning is due to the 'Discriminative-contrast Hypothesis' or the 'Distributed-practice Hypothesis'. Although interleaved practice is more effective than blocked practice, previous studies have not shown consistent results regarding the cause. Therefore, in this study, 103 first-year middle school students were randomly assigned to blocked practice, interleaved practice, remote blocked practice, and remote interleaved practice groups had learning activities over 4 times. The results reveals that the effect of interleaved practice appeared in similar types in the same domain, but the effect of interleaved practice did not appear in different types in different domain. In addition, through this result, it was confirmed that the effect of interleaved practice was due to the 'Discriminative-contrast hypothesis' rather than the 'Distributed-practice hypothesis'. Further research topics were suggested after the issues on the research method and the findings were discussed.

Extension and Case Analysis of Topic Modeling for Inductive Social Science Research Methodology (귀납적 사회과학연구 방법론을 위한 토픽모델링의 확장 및 사례분석)

  • Kim, Keun Hyung
    • The Journal of Information Systems
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    • v.31 no.4
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    • pp.25-45
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    • 2022
  • Purpose In this paper, we propose the method to extend topic modeling techniques in order to derive data-based research hypotheses when establishing research hypotheses for social sciences, As a concept in contrast to the existing deductive hypothesis establishment methodology for the social science research, the topic modeling technique was expanded to enable the so-called inductive hypothesis establishment methodology, and an analysis case of the Seongsan Ilchulbong online review based on the proposed methodology was presented. Design/methodology/approach In this paper, an extension architecture and extension algorithm in the form of extending the existing topic modeling were proposed. The extended architecture and algorithm include data processing method based on topic ratio in document, correlation analysis and regression analysis of processed data for topics derived by existing topic modeling. In addition, in this paper, an analysis case of the online review of Seongsan Ilchulbong Peak was presented by applying the extended topic modeling algorithm. An exploratory analysis was performed on the Seongsan Ilchulbong online reviews through the basic text analysis. The data was transformed into 5-point scale to enable correlation and regression analysis based on the topic ratio in each online review. A regression analysis was performed using the derived topics as the independent variable and the review rating as the dependent variable, and hypotheses could be derived based on this, which enable the so-called inductive hypothesis establishment. Findings This paper is meaningful in that it confirmed the possibility of deriving a causal model and setting an inductive hypothesis through an extended analysis of topic modeling.