• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.24 no.5
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• pp.25-30
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• 2024

Train derailment accidents have been increasing over the past five years. The causes of these railroad derailments were found to be mainly defective track switches that change train tracks, use of old parts, and poor maintenance issues. In this paper, to solve these problems, an intelligent sensor-based automatic railway risk prediction algorithm and hypothesis were established and computer simulation experiments were performed. In particular, research on RFID technology and IoT sensor technology was conducted on a WEB basis. In addition, in this paper, in order to prevent country of origin counterfeiting accidents, a blockchain-based computer simulation to prevent forgery of railway parts was performed using open source.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.24 no.5
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• pp.111-116
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• 2024

These days, the number of patients committing suicide due to depression and stress is rapidly increasing. In addition, if stress and depression persist for a long time, it can cause heart disease, brain disease, and high blood pressure. Arteriosclerosis, known as the main cause of cerebrovascular disease, is a dangerous disease in which cholesterol accumulates in blood vessels, narrowing them. However, no matter how much modern medicine has developed, stroke patients are in a very difficult situation with no special medicine or treatment. In this paper, to solve these problems, we proposed a smart electronic acupuncture device that treats patients' diseases based on electronic acupuncture. In addition, an algorithm for predicting the risk of health status of stroke patients and a posture recognition algorithm were proposed and a computer simulation experiment was performed.

• CHINESE LITERATURE
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• v.96
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• pp.1-18
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• 2018

悼亡诗是個用诗歌形式来悼念先亡夫妻的一種文学艺术样式。 中国悼亡诗有很悠久的来源, 先秦以前在《诗经》中已经出现了悼念死亡的诗歌, 其悼念的对象各不同。 但在汉代以前的诗歌中, 除了汉武帝的《秋风辞》, 《李夫人歌》, 《落叶哀蝉曲》以外, 难以找到类似悼亡诗的诗, 真正的悼亡诗可以说到西晋孙楚《除妇服诗》, 番岳《悼亡诗》3首以后才开始。 魏晋南北朝悼亡诗形式和叙述方式上的主要特點是, 一, 写出寂寞荒凉的居处和墓地。 二, 写出亡者的遗物。 三, 组诗的趋势。 这样敍述方式表明魏晋南北朝悼亡诗的对於汉代的繼承。 唐宋悼亡诗只不繼承前代的典型, 而再加上自己时代的固有特色。 一, 赞美亡妻的美貌和品德。 二, 写留下的子女。 三, 写梦境的方式。 明清时期悼亡诗在诗人和作品数量方面有了起飞的发展, 繼承了以前时期悼亡诗的典型, 只止於沿袭魏晋南北朝和唐宋时期传统, 在风格和敍述方式上没做出自己时代的固有特色。 这成为明清悼亡诗堕落了缺少真情的例行性悼念诗的主要原因。 明清时期悼亡诗的主要特點是, 一, 典型性和例行性的强化。 二, 没有写子女。 三, 女性悼亡诗人的增加和悼亡诗范围的扩大。

• Journal of Korean Society of Forest Science
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• v.34 no.1
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• pp.31-46
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• 1977

The study was made to give some helpful information for policy-making on ornamental tree cultivation by doing a survey on general situations, management analysis, and future prospects of the ornamental tree growing. The study was carried out through literature studies related to the subject, questionaire surveys, and on-the-spot investigation. The questionaire surveys could be divided into two parts: pre-questionaire survey and main-questionaire survey. In the pre-questionaire survey, the researchers intended to identify the total number of ornamental tree growers, cultivation areas in size and their locations. The questionaires were sent to each town and county administration authorities, forest cooperatives, and related organizations through-out the nation. The main-questionaires were prepared for detailed study and the questionaires were sent to 200 tree growers selected by option by taking considerations of the number of tree growers and the size of cultivating areas in regions. The main findings and some information obtained in the survey were as follows: 1. The total land for ornamental tree growing was amounted to 1,873.02 hectares and the number of cultivators was totaled to 2,717. 2. The main occupations of the ornamental tree growers were found in horticulture (41.9%), agronomy (25.9%), officialdom (11.3%), animal husbandry (6.5%), business circle(4.8%), and forestry (3.2%) in sequence. 3. The ornamental trees were cultivated mostly upperland (54.8), forest land (19.4%), rice paddy (11.3%) and others. 4. The educational training of the tree growers seemed quite high. The results of the survey indicated that a large number of tree growers was occupied by college graduates (38.7%), and then high school graduates (34.7%), middle school graduates (12.9%) in order. 5. The tree farming was undertaken as a side-job (41.9%) rather than main-job (23.4%), but a few of respondents rated as subsidiary-job (18.6%). 6. The management status classified by the rate of hired labors used was likely to belong to three categories: independant enterprise management (41.9%); half independant management (31.5%); and self-management (32.4%). 7. The majority of the tree growers sold their products to the consumers through middle-man channel (48.4%), or directly to the house-holder and detailers (13.7%), but a few of the respondents answered that they disposed of their products by bidding (11.2%) or by direct selling to the contractors (4.8%). 8. The channel cf marketing seemed somewhat complicated. The results of the survey were as: (1) producers ${\rightarrow}$consumers (22.6%) (2) producers ${\rightarrow}$field middle-men${\rightarrow}$consumers (33.1%) (3) producers ${\rightarrow}$field middle-men${\rightarrow}$first stage brokers${\rightarrow}$consumers (15.3%) (4) producers ${\rightarrow}$field middle-men${\rightarrow}$second stage middle-men${\rightarrow}$brokers${\rightarrow}$consumers (5.7%) (5) producers${\rightarrow}$field middle-men${\rightarrow}$third stage middle-men${\rightarrow}$second stage middlemen${\rightarrow}$brokers${\rightarrow}$consumers (4.8%) 9. It was responded that the margin for each stage of middle-men or brokers was assumed to be 30-50%(33.1%), 20-30%(32.3%), 50-100%(9.7%), and 100-200%(2.4%) in sequence. 10. The difference between the delivery price of consumers and field selling price of the producers seemed quite large. Majority of producers responded that they received half a price compared to the consumer's prices. 11. About two thirds of the respondents opposed to the measure of "Law on Preservation and Utilization of Agricultural Land" in which says that all the ornamental trees grown on flat agricultural lands less than 8 degrees in slope must be transplanted within three years to other places more than 8 degrees in slope. 12. The tree growers said that they have paid rather high land taxes than they ought to pay (38.7%), but come responded that land tax seemed to be appropriate (15.3%), and half of the respondents answered "not known". 13. The measures for the standardization of ornamental trees by size were backed up by a large number of respondents (57.3%), but one third of the respondents showed negative answer (29.8%). 14. About half of the respondents favored the systematic marketing through organization such as forest cooperatives (54%), but quite a few respondents opposed to organizing the systematic marketing channel (36.3%). 15. The necessary measures for permission in ornamental tree cultivation was rejected by a large number of respondents (49.2%) than those of favored (43.6%).

• Journal of Technologic Dentistry
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• v.17 no.1
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• pp.41-57
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• 1995

This study was conducted to collect and analyze previous information in order to manage efficience, improve experience effect and promote employment rate. The questionnaire interview with 27 chief of dental Laboratory refered clinical experience in technology department about clinical experience in 14 Jumior colleges were also investigated. The results were summarried as follows : The portion of age of 35-39 among chief of dental Laboratory was 40.7% which was the highest, that of male was 96.3%, that of junior college graduate was 97.5%, that of 10years experience was 92.6% and that of ceramic technician was 85.2%, 63.0% dental laboratory for clinical experience was a bore space of 30pyong. Aspect of dental laboratory management, manufacturing all part of prosthetic restoration was 29.6%, othodontic appliance and ceramic restoration was 7.4%, 3.8%, each. The percentage of 40.7 was having connection with 30-3a dental clinics and referring case per day was 10-19 cases(40.7%), manufacturing time of referred prosthetic restoration was 3-4 days(77.8%), places preparing seminar room for education was 29.6%, above a place of 40pyong was 11.1% 30-34 pyong and 35-39 pyong was 7.4% each. During training of 2 years education course student, 18.5% was rack of thorough occupational career. While 44.4% will want the more salary among 3years education course student, 74.1% will expect the more dental techmicians would engaged in their field, 51.9% will hope improve of their theory and practice, 29.6% be expected better skill and 14.8% be expected better theory. Attitude of clinical experience places was distributed by 59.3% of offering only experience chance, 25.9% of wasting time and 29.0% of annoying. The big emphasis of climical experience was thorough occupational career(44.4%). The clinical experience places of our college were selected after direct visiting, so their condition of management was not that bad but most of dental laboratory were poor in management state and working environment. Therefore it is difficult to choose appropriate places and dental Laboratory are also limited manpower and time as suppliers. So that it recommended to induce flexible management of experience period by interval and rotation of experience places among college and to applicate intern-system for employment ant industry-college cooperation aspect.

• Applied Chemistry for Engineering
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• v.17 no.2
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• pp.229-234
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• 2006

The effect of ZnO in the decomposition of poly(vinyl chloride) (PVC) and polystyrene (PS) mixtures in air atmosphere has been studied by thermogravimetry (TG) and gas chromatograph-mass spectrometry (GC-MS) under various mixing ratios and reaction temperatures. From this work, it can be seen that the yields of a liquid product were increased with the increase of PS in mixtures, whereas those of gaseous products were decreased. And the yields of a gaseous product and HCl were decreased with the increase of ZnO in mixtures. It was also found that HCl was rarely produced at ZnO/Mixture = 0.5 by the effect of ZnO in dehydrochlorination of PVC.

• Communications for Statistical Applications and Methods
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• v.15 no.2
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• pp.173-191
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• 2008

The goal of this paper is analyzing and modeling the trend of apartment market price in Seoul using the dynamic linear model(DLM). We use the market price per pyeong of 30-pyeong-apartment provided by "KB apartment market price database" of Kookmin bank. The data is collected from June $24^{th}$, 2003 to August $28^{th}$, 2006. The inspection of the data reveals that the trend of apartment market price in Seoul can be divided into two groups and we assume that the price is expressed by the common trend of divided groups. We try to estimate the price of apartment by DLM using the Bayesian method.

• Journal of the Korean Magnetics Society
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• v.12 no.5
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• pp.179-183
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• 2002

Fe-Si-C alloy system has been made by mechancial alloying process. The structural and magnetic properties were analysed as a function of processing times. The structural properties were investigated by X-ray diffraction and EXAFS experiments. The magnetic properties were measured by vibrating sample magnetometer and M ssbauer spectroscopy. As processing time increases, Si and C atoms diffuse into a ${\alpha}$-Fe structure and then bcc solid solution is formed after 12 hours of the processing time. The magnetization and the hyper fine field decreased steeply up to 4 hours and then it changed slowly. After 12 hours of the processing time, it almost saturated. These results were agreed with the structural variation.

• Journal of Chest Surgery
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• v.29 no.9
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• pp.1050-1053
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• 1996

Basalold squamous carcinoma (BSC) is a rare, aggressive neoplasm of the upper aerodigestive tract or esophagus. It is characterized by a biphasic pattern in which basaloid tumor is intimately associated with a neoplastic squamous component which can be either Invasive r in situ. Despite its characteristic histologic appearance, the BSC of the esophagus has been confused with esophageal neoplasm variously reported as adenoid cystic carcinoma or carcinoma with adenoid cystic differentiation Their distinction is important because genuine adenoid cystic carcinoma is much less as- gressive than BSC. The biologic course of BSC is similar to that of the more frequent squamous cell carcinoma of the esophagus. We have experienced a case of BSC of the esophagus in a 60-year-old male patient. The lesion was located in the middle third of the esophagus. The patient was treated with surgery followed by radio- therapy.

• Journal of the Korean Society for information Management
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• v.19 no.1
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• pp.89-114
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• 2002

Information technology. computers, networks, and the World Wide Web are ubiquitous. Academic libraries have applied information technology over the last ten years. The traditional role of the library as the scholarly information heart of the university is being questioned as information technology makes Information ever more easily accessible. And the recent technological development may alter the fundamental concept or identity of the academic library in the twenty-first century. This paper examines the ways in which information technology have chanced the academic library over the last decades and deals with the logical interrelation of 'information technology' and 'management' in the context of academic libraries in Korea. The purpose of this paper is to analyse the impacts of information technology on academic library management (organizational structure. librarian's job and role. budget allocation and expenditures, space planning and functionality, collection paradigm, user service, academic entity, etc) and suggests a desirable acceptance attitudes and efficient management acceptance attitude and management.