• Journal of the Korea Society of Computer and Information
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• v.26 no.9
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• pp.105-114
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• 2021

ESICD(Electrical Signal Interface Control Document) refers to a document that describes protocols and data for communication between components consist of a system. Each component developer gathers at a specific place to conduct an integrated test for ESICD verification. In this case, it often happens that the integration test is delayed due to a simple mistake of software developers. There are two reasons for this situation: First, software developers do not perform sufficient verification because it is difficult to configure the system environment in a Lab, and second, they do not immediately find the cause of errors occurred during integration tests. Therefore, in this paper, we propose a strategy to effectively perform ESICD verification, which takes a lot of time between the production and implementation stage of the weapon system development stage and the system integration test stage.

• Journal of the Korean Applied Science and Technology
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• v.37 no.4
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• pp.688-698
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• 2020

The purpose of this study is to identify the factors Job Embeddedness of a university hospital nurse. Data was collected from August 1 to August 10, 2017, for 238 nurses working at a university hospital in C city. Data were analyzed with descriptive statistics, t-test, ANOVA, and multiple linear regression. As a result of this study nursing organizational culture was 3.32±0.33, organizational communication satisfaction was 3.19±0.37, and job Embeddedness was 3.19±0.44. Job Embeddedness, nursing organization culture(r=.502, p<.001), and organizational communication satisfaction(r=.673, p<.001) were positively correlated. Factors affecting job Embeddedness are organizational communication satisfaction(β=.575 p<.001), work experience 'more than 10 years'(β=.342, p<.001), nursing organization culture(β=.203, p<.001), followed by work experience of more than 5 to less than 10 years(β=.121, p<.001), and the explanatory power of the model was 57.4%. According to the above results, it is necessary Job Embeddedness level of organizational communication satisfaction at any time and develop nursing practice and educational intervention programs in consideration of work experience and nursing organizational culture in order to increase the degree of access to nursing positions of hospital nurses.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.29 no.12
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• pp.781-785
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• 2016

With trend of the miniaturization and the high-functionalizing of mobile communication system, low-loss microwave dielectric materials are widely used for high frequency communication components. These dielectric materials should be co-sintered with highly electric-conducting metal such as silver or copper for high-frequency and thick film process application. Sintering temperature of $Ca(Li_{1/3}Nd_{2/3})_{0.2}Ti_{0.8}]O_{3-{\delta}}$, which has excellent dielectric properties such as ${\varepsilon}_r$ above 40, quality factor ($Q{\cdot}f_0$) above 16,000 GHz, and TCF (temperature coefficient of resonant frequency) of $-20{\sim}-10ppm/^{\circ}C$, is reported as high as $1,175^{\circ}C$, so it could not be co-sintered with silver or copper. Therefore in this study, low-temperature melting glasses of Zn-B-O and Zn-B-Si-O systems were added to $Ca[(Li_{1/3}Nb_{2/3})_{0.8}Ti_{0.2}]O_{3-{\delta}}$ to lower its sintering temperature under $900^{\circ}C$ without losing excellency of dielectric properties. With 15 weight % of Zn-B-Si-O glass and sintered at $875^{\circ}C$, specimen showed density of $4.11g/cm^3$, ${\varepsilon}_r$ of 40.1, $Q{\cdot}f_0$ of 4,869 GHz, and TCF of $-5.9ppm/^{\circ}C$. With 15 weight % of Zn-B-O glass and sintered at $875^{\circ}C$, specimen showed density of $4.14g/cm^3$, ${\varepsilon}_r$ of 40.4, $Q{\cdot}f_0$ of 7,059 GHz, and TCF of $-0.92ppm/^{\circ}C$.

• Journal of information and communication convergence engineering
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• v.8 no.3
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• pp.289-294
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• 2010

In the vehicle communication system, transferred information is needed to be detected as possible as fast in order to inform car status located in front and rear side. Through the moving vehicle information, we can avoid the crash caused by sudden break of front one or acquire to real time traffic data to check the detour road. To be connecting the wireless communication between the vehicles, fast timing synchronization can be a key factor. Finding out the sync point fast is able to have more marginal time to compensate the distorted signals caused by channel variance. Thus, we introduce the combination method which helps find out the start of frame quickly. It is executed by auto-correlation and cross-correlation simultaneously using only short preambles. With taking the absolute value at the implemented synch block output, the proposed method shows much better system performance to us.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.7
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• pp.3080-3099
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• 2016

In this paper, we propose an algorithm for energy efficient cooperative communication in wireless sensor network (WSN). The algorithm computes the appropriate transmission distance corresponding to optimal broadcast bit error probability, while taking the circuit energy consumption and the number of cooperating nodes into consideration. The algorithm guarantees minimum energy consumption by choosing higher value of bit error probability for cooperative phase and lower value of bit error probability for broadcast phase while maintaining the required end-to-end reliability. The simulation results show that the proposed algorithm provides significant energy saving gain when compared with traditional fixed distance schemes and is suitable for applications demanding energy efficiency with high quality of reception.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.52 no.11
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• pp.657-661
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• 2003

In this paper, we designed a portable digital pressure algometer which not only can measure the pain level objectively and quantitatively, but also is able to do RF communication. This system consists of pressure sensor for pain measurement, analog signal analysis, digital hardware based on PIC16C73B, RF communication and display. To evaluate the performance of the developed system, we measured pressure threshold using commercial analog PA(Pressure Algometer) and the proposed system, and then evaluated the correlation and confidence. Using linear regression analysis, standard deviation of 0.1731 and R-square value of 99.3% were obtained. In conclusion, the above results showed good performance and its usability in measuring the pain clinically.

• Proceedings of the KIEE Conference
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• 1996.07b
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• pp.1313-1315
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• 1996

This paper presents a new method to obtain more stable and precise A/D conversion for remote sensing use. Hardware is designed to compensate offset voltage and drift & temperature characteristics, as well as to perform dual slop A/D converter by using single chip microprocessor. Serial communication program which is based on ASCII code commands is also developed to add initial setup & calibration functions as well as to perform A/D data communication. Proposed method will give a good applications to the industrial field where a high precision remote sensing is required.

• Journal of the Korea Institute of Military Science and Technology
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• v.23 no.4
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• pp.371-380
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• 2020

Video is principal information that facilitates commander's immediate command decision. Due to fading characteristics of radio link, however, it is difficult to stably transmit video in a multi-hop wireless environment. In this paper, we propose a MANET structure composed of a link adaptive routing protocol and a TDMA MAC protocol to stably transmit video traffic in a ultra-narrowband video streaming network. The routing protocol can adapt to link state change and select a stable route. The TDMA protocol enables collision-free video transmission to a destination using multi-hop dynamic resource allocation. As a result of simulation, the proposed MANET structure shows better video transmission performance than proposed MANET structure without link quality adaption, AODV with CSMA/CA, and OLSR with CSMA/CA structures.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.19 no.12
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• pp.1375-1382
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• 2008

Frequency adjustable D-CRLH(dual-composite right/left handed) transmission lines, which solve the problem of design complexity and uncontrolled frequency of the existing structures, are proposed in this paper. The first design(type I), consisting of defected ground structure(DGS), island pattern in DGS, fixed stub and varactor diodes, controls $C_L$ in the parallel resonant circuit, while the second structure(type 2) composed of fixed DGS, shunt stub and diode adjusts $C_R$ in the series resonant circuit. The dual band frequency points which correspond to the meaningful electrical length of +/-90 degree in the RH/LH region are adjustable according to the bias voltage. The measurement shows that the LH frequency point which has -90 degree of electrical length are adjusted over $4.22{\sim}5.39\;GHz$ and $4.21{\sim}5.05\;GHz$ for type 1 and type 2, respectively, under $1{\sim}12\;V$ of bias voltage. In addition, the frequency Woo where RH turns over LH is controled over $3.26{\sim}4.22\;GHz$ for type 2 with the same bias condition.

• Journal of Korean Academy of Nursing
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• v.23 no.1
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• pp.5-15
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• 1993

This study examined the effects of therapeutic communication skills, self esteem and self concept, psychiatric nursing lectures on students' psychiatric nursing practice evaluation scores. The purposes of this study were to determine factors influencing students' psychiatric nursing practice to improve the quality of that practice. The subjects were 123 third year nursing students in the department of nursing of G University in C city. Data were collected from 1989 to 1991 by question-aires and academic records. Pearson Correlation and t-test were used in analysing the data to confirm the relationship and influence among the study variables. Stepwise Multiple regression was used to confirm the predictors of the nursing students' psychiatric nursing practice evaluation scores. The results were as follows : 1) Relationship of General characteristics and Psychiatric Nursing Practice Evaluation Scores : General characteristics were not significant on psychiatric nursing pracice evaluation scores. 2) Relationship of the therapeutic communication skill and psychiatric nursing practice evaluation scores : the higher the degree of therapeutic communication skill was the higher the scores for psychiatric nursing practice (r=.5528, p(.001). 3) Relationship of psychiatric nursing course and psychiatric nursing practice evaluation scores the higher the scores in the psychiatric nursing course the higher the scores for psychiatric nursing practice (r=.2793, p(.01). 4) Relationship of self-esteem & self concept and psychiatric nursing practice evaluation scores : Self-esteem 8f concept was not significant on psychiatric nursing practice evaluation scores. 5) Stepwise multiple correlation of therapeutic communication skills, self-esteem and self concept, psychiatric nursing lectures on psychiatric nursing practice evaluation scores showed that therapeutic communication skills and the psychiatric nursing course scores influenced the evaluation scores psychiatric nursing practice significantly.