• ETRI Journal
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• 제30권1호
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• pp.47-58
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• 2008

In sensor networks, analyzing power consumption before actual deployment is crucial for maximizing service lifetime. This paper proposes an instruction-level power estimator (IPEN) for sensor networks. IPEN is an accurate and fine grain power estimation tool, using an instruction-level simulator. It is independent of the operating system, so many different kinds of sensor node software can be simulated for estimation. We have developed the power model of a Micaz-compatible mote. The power consumption of the ATmega128L microcontroller is modeled with the base energy cost and the instruction overheads. The CC2420 communication component and other peripherals are modeled according to their operation states. The energy consumption estimation module profiles peripheral accesses and function calls while an application is running. IPEN has shown excellent power estimation accuracy, with less than 5% estimation error compared to real sensor network implementation. With IPEN's high precision instruction-level energy prediction, users can accurately estimate a sensor network's energy consumption and achieve fine-grained optimization of their software.

• 패션비즈니스
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• 제9권1호
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• pp.120-136
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• 2005

The purpose of this study is to analyze consumers' perceived risk which is shown in the process of purchase phase and consumption phase for the counterfeits of fashion luxury brands and to analyze the interrelationship of each type of perceived risk. The research method of the study used a qualitative approach. 6 informants were selected and then an in-depth interview was held with them. Through this process the data on the perceived risk for counterfeits were collected and analyzed. The results of the study are as follows; The perceived level of psychological risk including counterfeits exposure was extremely high; besides, economic risk and performance risk were also perceived. On the contrary, the perceived level of social risk and fashionability loss were relatively low. The risk perception for counterfeits appeared not only on the purchase phase but also on the consumption phase, and when perceived risk existed on the consumption phase, it had an influence on the level of perceived risk on the next purchase phase. However the psychological risk was continuously perceived on both purchase and consumption phase, even if it did not exist on the consumption phase. Psychological risk, economic risk and performance risk were not independent but interdependent. Moreover, the entire level of perceived risk could be controlled by reducing the level of other perceived risks when a certain type of risk was highly perceived.

• 성인간호학회지
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• 제19권2호
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• pp.295-304
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• 2007

Purpose: The purpose of this study were to investigate the level of family support, alcohol consumption and drinking motives in patients with liver cirrhosis and to examine the relationships among those variables. Methods: The subjects consisted of 60 patients with liver cirrhosis. Family support scale, Q-F methods and Drinking Motives Questionnaire were used to measure the level of family support, alcohol consumption and drinking motives. Results: The level of family support was 43.62. Prevalence of drinking was 90% and 43.3% were currently heavy drinkers. Alcohol consumption was related to sex and education. There were positive low relationships between the level of enhancement motive, coping motive, social motive, and Q-F Index. Conclusion: Alcohol drinking is a serious health problem in patients with liver cirrhosis. It is necessary to have an educational approach for controlling drinking and family support.

• 전자공학회논문지S
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• 제35S권3호
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• pp.65-75
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• 1998

We consider connection-oriented wireless cellular networks such as the second generation wireless cellular networks and wirelss ATM networks. In these networks, a separate forward signaling channel is provided for the transmission of paging and channel allocation packets. When a call destined to a user is requested, all the base stations in the user's current location area broadcast the corresponding paging packet across forward signaling channels. By slot mode operation and paging group allocation for fusers in a location area, we can reduce relative power consumption level at battery-operated terminals. However, a sthe number of paging groups is increased for lowering relative power consumption level, a paging packet experiences higher delay to access the forward signaling channel. For the pre-negotiated quality-of-service level, paging packet delay level must be limited. In this paper, we consider static and dynamic multiplexing schemes for paging packets, and develop an analytical method for calculating paging packet delay and relative power consumption levels. Using this analytial method, we investigate the effect of network parameters on the paging packet delay and relative power consumption levels.

• 가정과삶의질연구
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• 제19권5호
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• pp.259-277
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• 2001

The purpose of this study was to identify household’s level and standard of consumption and their related variables in order to derive some useful implications for developing sustainable lifestyle. Data were collected from 567 household wives living in Seoul and the five Metropolitan cities in Korea. The results showed that most households owned such goods as central heating system, shower and bath, refrigerator, microwave oven, vacuum cleaner, washer. TV video player, personal computer, mobile phone, and car. They thought that most of the goods were necessary for the desired level of living and has a strong aspiration to buy those goods. This implied a tendency of uniformity in need perceptions and consumption patterns among Korean households. However, level and standard of consumption measured in selected living area differed according to age. education family size, household income, occupation, and the size housing, which showed that different approach was needed for developing sustainable lifestyle according to these variables.

• 가정과삶의질연구
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• 제23권3호
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• pp.63-76
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• 2005

Using the data from the Family Income & Expenditure Survey, this study investigated (1)the factors determining the level of burden of the private educational expenditure in households; (2) the influences of the level of the burden of private educational expenditure on the other household expenditures. For the analysis of data Chi-square, GLM, Multinomial legit, and Seemingly Unrelated Regression were applied. The major findings were: (1) The factors associated with the burden of private educational expenditure were the number of students by each of the school levels, housing tenure, location of residence, educational attainment of householder; (2) Households with the lower level of burden of the private educational expenditure adjusted the allocation of the expenditure shares of food, utility, and transportation and did not reduce the levels of consumption. Households with the higher level of burden of the private educational expenditure adjusted the extensive ranges of the household expenditure shares and reduced the levels of consumption.

• 대한가정학회지
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• 제42권1호
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• pp.81-97
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• 2004

The purpose of this study was to examine children's consumption level and related factors in an effort to lay the foundation for teaching children to lead rational consumer life and for improving consumer welfare, as it's assumed in this study that children's consumption problems would affect themselves throughout their lives. This study specifically intended to find out (1) child consumer problems, (2) how children's consumption problems were affected by their demographic variables, (3) whether consumer-education experience made any differences to their consumption problems at school, home and society, and (4) what types of demographic and consumer-education variables exercised influence on consumption problems. The findings of this study were as follows： First, children investigated were found to have middle level of consumption problems. Purchasing goods scored the lowest, and using goods scored the highest among consumption problems. Second, it turned out that boys suffered more consumption problems than girls. The reason seemed that as boys generally have lower experience in consumption attitude. Third, as to the correlation of the children's consumption problems to their consumer-education experience, money management was significantly associated with the presence or absence of experience to learn at school how to manage and save allowances. Also, the experience of consumer education by parents made a significant difference. The children's consumer consciousness and attitude varied with their experience to receive consumer education from mass media.

• 유통과학연구
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• 제18권6호
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• pp.63-75
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• 2020

Purpose: This study examines the motivations that prompt customers to use commercial sharing services (CSSs), and the relationship between anti-consumption and the perceived utility of CSSs in the fashion-sharing business. This study tries to understand how the two types of anti-consumption can differentially affect consumers' perceived utility to use CSSs. In particular, as the types of CSS have diversified and many consumers have used them, it can be expected that the influence of anti-consumption on the perceived utility of CSSs can change, depending on the field where the CSS is applied. Research design, data and methodology: The structural equation modeling (SEM) with the SPSS 22.0 and AMOS 18.0 programs was used. Results: This study found that (i) two types of anti-consumption (voluntary and selective) differentially affect the perceived utilities to use CSSs; (ii) the two types of anti-consumption differentially affect the perceived utility to use CSSs depending on the level of the brand. Conclusions: In order to promote the spread of consumers' use in the sharing economy, it will be possible to identify what important utility is and make a meaningful contribution to the establishment of future marketing strategies.

• 대한가정학회지
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• 제41권6호
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• pp.105-117
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• 2003

This study was intended to investigate specific plan to enhance the adolescents consumers' environment-friendly consumption behavior in their consumption. For this purpose, a questionnaire was conducted among middle and high school students. As a result, the following findings were obtained: The related items in the questionnaire were categorized into factors in an attempt to investigate consumers' environment-friendly consumption. Factor I was coded as active recycling and the use of refilled products and Factor Ⅱ was coded as the behavior of active savings. Adolescents consumers with more experiences in environmental activity showed the higher level of behavior of environment-friendly consumption, and female adolescents consumer did so than male adolescents consumer And adolescents consumers showed the higher level of practical behavior of environment-friendly consumption in case of data and document arrangement than in case of cleaning, and in case of voluntary social service than in case of only cleaning.

• 한국의류학회지
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• 제28권1호
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• pp.1-11
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• 2004

Cultural value is widely accepted as the crucial concept in understanding consumer behavior: cultural values influence consumption values, which determine choices of consuming everyday products and services. The objectives of this study were to (a) identify the difference between cultural and consumption values in the Korean fashion industry and (b) to explain the difference using the existing theories introducing fashion system, which are Solomon(2002)'s cultural production model in marketing area and Hamilton(1997)'s fashion system arbiter in clothing area. The qualitative data used to identify cultural values were 160 apparel advertisements listed in a fashion magazine issued in 2002. Utilizing the convenient sampling method, the quantitative data used to identify consumption values were gathered by surveying female university students aged over 20 living in the Seoul metropolitan area. Of 369 returned questionnaires, 255 were used in factor analysis and paired t-test. Cultural value ignored functional aspect of apparel while it was one of the most salient factors for consumption value. With respect to success and fashion orientation factors, cultural value highly appreciated them while they were the least considered factors for consumption value. These implicate that the Korean fashion industry can be explained by Hamilton's macro-level cultural and fashion system arbiters and cultural production model as well. Introducing macro-level perspectives about fashion system, this study encourages researchers to expand their research spectrum from micro-level consumers to macro-level fashion industry, which has long been neglected by the fashion marketing researchers in Korea.