• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.37 no.7
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• pp.685-692
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• 2009

This paper dealt with the development of the Framework for Multidisciplinary Design Optimization for the rotorcraft design concept and the building process of KHP(Korea Helicopter Project) - SDM(Simulation Data Management) system to manage various analysis data, which are used in the rotorcraft development phase. KHP-SDM RMDO(Rotorcraft Multidisciplinary Design Optimization) framework, which applied optimization modules of KHP-SDM and integrated the developed Multidisciplinary analysis modules, was constructed in the KHP-SDM. The results of the rotorcraft conceptual design using KHP-SDM RMDO showed that the framework was evaluated to be successfully constructed.

• Environmental Engineering Research
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• v.23 no.2
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• pp.129-135
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• 2018

The aim of this study is to assess the applicability of ferrate(VI) in the efficient treatment of aqueous waste contaminated with potassium hydrogen phthalate (KHP) which is known to be a potent endocrine disrupting chemicals. Simulated batch reactor operations were conducted at a wide range of pH (7.0 to 12.0) and molar ratios of KHP to ferrate(VI). Kinetic studies were performed in the degradation process and overall rate constant was found to be 83.40 L/mol/min at pH 8.0. The stoichiometry of ferrate(VI) and KHP was found to be 1:1. Further, lower pH values and higher KHP concentrations were favoured greatly the degradation of KHP by ferrate(VI). Total organic carbon analysis showed that partial mineralization of KHP was achieved. The presence of several background electrolytes were studied in the degradation of KHP by ferrate(VI).

• Journal of Applied Reliability
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• v.11 no.2
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• pp.187-212
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• 2011

KHP project sets total ownership cost as the target cost by applying CAIV and administrates total ownership cost through compromise analysis, a periodical estimate and management of design alternatives for each development. Based on expected cost results, sensibility of total ownership cost is analyzed complying with the change of reliability, availability, maintainability and other related factors. By considering potential total ownership cost saving methods, first of all, this paper identifies total ownership cost changing effects for each related factor, secondly, suggests total ownership cost and maintenance and operating cost saving methods via finding components that affect total ownership cost and lastly, suggests total ownership cost saving directions that may be applied to other projects in the future.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• v.4 no.1
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• pp.49-62
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• 2023

Phthalates are animal carcinogens. Potassium hydrogen phthalate (KHP), which has the least complicated structure among phthalates, is used for the analysis of total organic carbon and formaldehyde. However, its toxicity has not been confirmed. A 24-hour acute toxicity test was performed using Daphnia magna, a water flea used to evaluate aquatic toxicity owing to its high sensitivity. The lowest observed effect concentration of KHP was found to be 240 mg/L. The effects of phosphorus, nitrogen, and Cr(6+), which are able to be discharged along with KHP, were also confirmed using tests. At 240 mg/L KHP, toxicity increased as phosphorus, nitrogen, and Cr(6+) increased. In addition, tests were performed to confirm the half maximal effective concentration of KHP. Through 10 test repetitions, the average ecotoxicity value was found to be 0.3, the average half maximal effective concentration was 327.75 mg/L, and the coefficient of variation (%) was 3.16%; because the latter value is lower than 25%, which is what is generally suggested for the water pollution standard method, the reproducibility of the tests is sufficient to replace the existing standard reference toxicity test that uses potassium dichromate. In addition, the half maximum effective concentration of potassium hydrogen phthalate is approximately 218 times more than that of potassium dichromate; therefore, toxicity is relatively low. In conclusion, KHP is a feasible alternative to the highly toxic potassium dichromate for performing the standard reference toxicity test.

• Journal of the East Asian Society of Dietary Life
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• v.14 no.1
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• pp.34-38
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• 2004

This study was carried out to evaluate the effects of Kimchi homogenate product(KHP) on dough characteristics and quality of bread. Breads were prepared by the addition of 0, 7, 14 and 21％ of KHP to the basic formulation. The pH of dough with KHP were ranged from 5.19 to 5.30 and pH of the control was 5.58. Loaf volume index of the bread prepared by adding 7∼21％ KHP increased by 5.4∼17.2％. Color L value of the bread crust and crumb with KHP decreased, color a value of the bread crumb with KHP increased, and b value of the crumb with KHP decreased. The hardness decreased with the addition of KHP, but the cohesiveness and springiness increased with the addition of KHP. Sensory quality of the Kimchi hamburger bread estimated by shape, flavor and overall quality was better than that of the control bread. Especially, the Kimchi hamburger bread quality with addition of 14％ KHP was the best.

• Journal of the military operations research society of Korea
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• v.32 no.1
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• pp.73-89
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• 2006

In this paper, EVMS procedure for KHP program is presented. Research and development of a defense system as a long lead program has a high probability of cost growth due to the uncertainty and risk. Therefore, meeting schedule, technical performance and preventing excessive cost overrun are the main concerning point to successful research and development program. EVMS(Earned Value Management System) is a program management system using earned value to control cost, schedule and technical performance. In order to control cost and schedule and to meet technical performance requirements of the KHP research and development program, it is necessary for us to adapt EVMS to the program.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.4
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• pp.330-335
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• 2012

This study performed the structure analysis for development and localization of main and nose wheel in Korean Helicopter Program(KHP). Structural stability of wheel is evaluated using ANSYS. Considering wheel and tire interface, Stress analysis was conducted by applying pneumatic of tire, static load, radial load and combined load on main and nose wheel. Considering yield strength at which plastic deformation occurs, simulation results suggest the method which increases structure stability after comparing maximum stress and yield strength.

• The Korea Journal of Herbology
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• v.38 no.6
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• pp.53-60
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• 2023

Objectives : The objective of present study was to investigate the vasorelaxant effects of 10 traditional Korean Herbal Prescriptions (KHP) on isolated rat thoracic aorta precontracted with potassium chloride (KCl). Methods : An electric extractor was used to extract KHP in distilled water for 3h. Rat aorta rings were isolated and were precontracted using KCl in organ chambers containing 10 ml Krebs Henseleit (KH) buffer. KHP extracts were added in increasing concentrations (10-1000 ㎍/㎖) to investigate vasorelaxant effects. The vasorelaxant responses induced by KHP were expressed as a percentage in response to contraction generated by KCl. Results : Among the 10 KHP, Gamisoyo-san, Galgeun-tang, Gyeji-tang, Gwakhyangjeonggi-san, Daeyoung-jeon, and Socheongryong-tang showed significant vasorelaxant effect at high concentration. In contrast, Gyejibokryeong-hwan constricted more the aorta rings precontracted by KCl. And Gumiganghwal-tang, Guibi-tang, Saengmaek-san showed no significant effect. Also, rat aorta rings treated with Gyejibokryeong-hwan or Gyeji-tang after pre-relaxation by amlodipine did not cause any significant change. Conclusion : Thus, these results provide the experimental evidence as useful herbal prescriptions for the treatment of hypertension and suggest guidelines in conjunction with other western drugs, including amlodipine.

• Journal of Preventive Medicine and Public Health
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• v.36 no.1
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• pp.11-23
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• 2003

Objectives : The 1990s has seen advances in the conceptualization of self-perceived health status which has important roles for individual health and the quality of life. Many types of standardized questionnaires have been developed with the current wide use of SF-36, NHP, andEuroQol. However, the outcomes of these tools may be different with regard to regional, cultural and emotional backgrounds. The purpose of this study was to trial the development of a Korean Health Profile (KHP 1.0) to measure the self-perceived health stati of Koreans. Methods : The KHP 1.0 was designed on the basis of the Medical Outcome Study Form 36 (SF-36), the Nottingham Health Profile (NHP), and the EuroQOL. It was composed of 9 scales; physical functioning, role limitation-physical, pain, general health, energy, social isolation, sleep, role limitation-emotional, and e-motional health. Self-reported chronic disease conditions, and the Zung's Self-Rating Depression Scale (SDS), were also checked for the evaluation of clinical validity. This study was conducted, from December 2000 to January 2001, on 800 middle-aged parents, with four high school students, with 100 retest sets being conducted two weeks later. From the 800 subjects there were 588 complete responses (effective response 73.5%). The reliability of the test-retest results, and the factor analysis on the validity of the KHP 1.0 components, were evaluated using the SPSS (ver 10.0) software. Results : The reliability of the KHP 1.0 was good with Cronbach's alpha (>0.6), test-retest correlation coefficients (>0.5), but with no significant differences from the paired t-test. From the psychometric validity tests, the 9 scales of the KHP 1.0 were divided into two components; physical and mental, and trimmed to the established model with 55% of the total variance, with the exception of role limitation-emotional. The clinical validity on the basis of the comparison for the four characteristic groups; healthy, physical conditions only, mental conditions only, and physical and mental conditions were also good. Conclusions : The KHP 1.0 appears to be a valid measurement tool of self-perceived health stati of Koreans, although there are limitations, i.e. sample size was too small, a limited number of middle-aged subjects, and it was based on unconfirmed diagnoses, etc. Therefore, further study is required to standardize the assessment.

• YAKHAK HOEJI
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• v.57 no.5
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• pp.369-375
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• 2013

Objective: Using the Korean Health Panel data (KHP) of 2008 and 2009, this paper analyzed the effect of antihypertension medication adherence on the changes in medical service utilization and medical expenditure in the next year. Method: Through a face-to-face interview survey, KHP has provided an extensive data on demographic characteristics, medical utilizations behavior, medical expenditure and health behaviors of the targeted households and their members since 2008. KHP is recognized as highly accurate regarding medical expenditure in that it makes the target households to record 'Health diary' whenever they use healthcare service, which could minimize their cognitive bias or memory distortion. The 2010 KHP data was based on the interview from 6,432 households and 19,697 household members. Two part model was used to explore the effects of medication adherence on medical use (logistic regression analysis) and medical expenditures (OLS). Result: Our study result demonstrated that the 74.7% of the patients who strictly adhere to their medication in both years, in 2008 and in 2009, were likely to use inpatient service in 2010. This shows the noncompliant patients were in fact use emergency service less than the compliant patients. Conclusion: Based on our analysis, this paper concludes that the high medication adherence of hypertensive patients could contribute to reduce the emergency service use. Therefore it is highly recommendable for the Korean government and the insurer, NHIS, to actively invest in developing education and promotion program to improve medication adherence among hypertensive patients.