乙淑島의 鹽害地改良과 適作物 選定試驗에 관한 硏究

孫賢秀,金正基,安始榮,鄭大守 東亞大學校 1974 東亞論叢 Vol.11 No.2

乙淑島의 鹽海地 改良과 適作物選定 試驗에 관한 圃場現地試驗을 加里의 增施, 堆肥施用, 石灰施用等 要因實驗으로 實施한 結果 얻어진 結果를 要約하면 다음과 같다. 1. 堆肥施用은 채소의 發芽生育 및 收量增大에 效果가 컸다. 2. 石灰施用효과도 認定되었다. 3. 施用堆肥는 鹽分을 含有蓄積하였다. 4. 堆肥施用區의 毛管水中 鹽分濃度는 他區에 比해 적었다. 5. 共試作物中 鹽度에 對한 저항이 가장 큰것은 배추였다. 6. 鹽害地砂質土壤에서도 菜蔬栽培가 可能하였다. In order to improve nearly unarable Saline sand soil, a factorial experiment have been conducted to find out the effect of compost, lime and increased potassium application on the yield, germination and growth of some vegetables; the result obtained and discussed may be summarized as follows: (1) The effect of compost application was great to germination, growth and yield of some vegetables. (2) The effect of lime application was convinced. (3) NaCl-salts is much more concentrated in compost applied. (4) The salt concentration involved in capillary water at the plot of compost applied was less than that of the other plots. (5) Chinese Cabbage is most resistant to salt concentration among the vegetables tested. (6) It was able to grow vegetable cultivation on Woolsuck Island of Saline and Sand soil.

Co/Mn/Br계 촉매상에서 p-자일렌 액상산화반응의 공정변수에 관한 연구

손용배,박경린,류태공,김정희,오인석,김영호,양현수 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2

Liquid phase oxidation of p-xylene using molecular oxygen has been carried out on the Co/Mn/Br-based catalyst system in acetic acid as a solvent. Process parameters(total pressure, partial pressure of oxygen and temperature) and kinetics of the reaction were studied as a basic study in the viewpoint for the development of new catalyst system and process. The total pressure above 20atm and the partial pressure of oxygen above 5atm were required to keep the reactant in the liquid phase and to overcome the mass transfer limitation of oxygen. The oxidation rate conversion were increased with increasing reaction temperature to the 100∼190℃ range. For a given initial concentration of p-xylene, the oxidation rate and the apparent activation energy were found to be of first-order and 4.24 ㎉/㏖, respectively. The effect of the third components added to the Co/Mn/Br catalyst was also studied. It was found that Ni is only a good additive that can promote the catalyst performance.

미량 Ni 첨가 Fe-Ni 합금의 고온산화 거동에 관한 연구

孫根洙,尹在弘,金晋夏,金顯洙,成田敏夫,林重成 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.10

Oxidation behavior of Fe-Ni alloys added by small amount of Ni was studied, under the exposure to the temperatures up to 1100℃, 1150℃, and 1200℃, respectively. The slope of mass change curve representing an oxidation rate was 1 or 2 up to 20 seconds and decreased to 1/2 after 20 seconds in a parabolic shape. The temperature of the initial stage of oxidation increased more quickly at the furnace inside than at the surface of the specimen, and its behavior was reversed due to oxidation heat after 20 seconds later. Oxide layer was mainly composed of FeO. And particle of Fe_3O_4 and Fe_2O_3 was distributed in FeO layer. The order of the composition ratio for the oxide was Fe_2O_3,·Fe_3O_4,·FeO at the oxide surface, FeO,·Fe_3O_4,·Fe_2O_3 at the internal oxide, and FeO,·Fe_3O_4,·Fe_2O_3 at the surface of metal after stripping oxide layer.

최종공사비 예측을 위한 적정 성과지수 선정 및 검증

손보식,이동준,이현수 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2

Using EVMS can probably cause lots of confusion under the different systems and different circumstances of the construction industry between Korea and the United States, because the United States has wide experience in applying to EVMS during several decades but Korea has not. Therefore this research deals with the problem about Performance Indices in forecasting EAC(Estimate at Completion) among the problems of using EVMS. It was verified the newly proposed method on an apartment construction project having relatively sufficient performance data in order to select the most satisfactory performance index to be used in domestic construction projects. Based on the result of statistical method obtained through the adequacy analysis and confidence analysis, the 0.8CPIC+0.2SPIC, which is used in the United States, was found to be suitable for Korea. The methodology may be applied in other construction types as well.

육군 시설유지관리 인력산정 모델

손창성,손보식,김경래,이현수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

The corps of engineer battalion is in the maintenance management service for about 30 battalions subordinated to the infantry division, but the maintenance management manpower is a small number because the criterion of the maintenance management manpower is in accordance with the battle organization. So, this study suggests the reasonable maintenance management manpower estimating model according to the area, the quantity and so on of army installation. In this case study, we investigate the present states and the actual conditions for the 3 infantry divisions and 3 corps of engineer battalions, and find out improvement method based on the interview with the persons concerned.

大學의 理念과 使命

孫賢秀 東亞大學校 學生生活硏究所 1985 學生硏究 Vol.14 No.-

In vivo에서 상아질 접착제 도포가 상아세관액 이동과 치수신경활동에 미치는 영향

손호현,이광원,박수정 大韓齒科保存學會 1996 Restorative Dentistry & Endodontics Vol.21 No.1

IN VIVO에서 고양이 상아세관을 통한 상아세관액이 흐름

박수정,손호현,이광원 大韓齒科保存學會 1995 Restorative Dentistry & Endodontics Vol.20 No.1

골격성 Ⅲ급 부정교합자에서 상악골 전진술을 동반한 양악 수술 시 중안면 연조직 형태의 변화

정종현,김성식,손우성,박수병 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.2

본 연구는 중안면 함몰이 있는 골격성 III급 부정교합자의 중안면의 형태를 정상 표본과 비교하고, 악교정수술에 의하여 연조직이 어떤 변화를 보이는지를 알아보기 위하여 시행하였다. 골격성 III급 부정교합으로 진단받고 상악 전진술과 하악 후퇴술을 시행받은 환자 34명 (남자:15명, 여자:19명)을 대상으로 수술 전후 측모 두부방사선 계측사진을 분석하였다. 골격성 III급 부정교합자의 중안면의 경조직 계측치 S'-Or, Or⊥NA, S'Or/SN, ∠SNOr에서 남녀 모두에서 정상 교합자와 큰 차이가 있었다. 상악골이 평균 5.03 mm 전방이동 될 때 연조직 Orbitale는 2.26 mm 전방으로 이동하였으며 상관계수는 0.599였다(p < 0.05). 상악 평면각의 변화(시계방향으로 회전)와 상악골의 수직 이동은 연조직 Orbitale의 전방이동과 유의성있는 상관관계가 없었다. 상악골 전방이동에 대한 연조직 Orbitale와 Subnasale의 전방이동 비율은 각각 43.57%, 81.54%였다. 이상의 결과에서 중안면 함몰이 있는 환자는 상악골 전방이동시 상순과 비부 외에도 연조직 Orbitale를 포함한 중안면 연조직이 전방으로 이동하지만, 상악골의 회전이동 및 수직이동에 대해서는 연조직의 변화량이 적었다는 것을 알 수 있었다. 이는 상악골의 수술에 따른 중안면 함몰의 해소를 예측하는 데 도움이 될 것이다. Purpose: The first objective of this study was to compare the upper midface morpholgy, focusing on the soft tissues, between skeletal Class III maloccusion patients with midfacial depression and the norm. The second objective was to estimate and analyze the change in the upper midface soft tissues following surgical correction with maxillary advancement by Lefort I osteotomy and mandibular setback by bilateral sagittal split osteotomy (BSSRO). Methods: The samples consisted of 34 adult patients (15 males and 12 females) with an average age of 21 years, who had severe anteroposterior discrepancy with midfacial depression. These patients had received presurgical orthodontic treatment and surgical treatment which consisted of simultaneous Lefort I osteotomy and BSSRO. Results: The correlation coefficient between changes in maxillary advancement and changes in Or' (soft tissue orbitale) was 0.599 (P < 0.05). Change in maxillary plane angle and vertical change of the maxilla were not correlated with the change in Or' (P < 0.05). The ratio of soft tissue change in Or' to maxillary advancement was 43.57 %, and 81.54 % in Sn. Regression equations between maxillary movement and Or' were devised. The r² value was 0.476. Conclusions: The majority of measurements in the upper midface in skeletal Class III maloccusions when compared to the norm, showed significant differences. In Class III malocclusion with midfacial depression, maxillary advancement produces soft tissue change in the upper midface.

이단하소에 의해 제조된 PNN-PZ-PN 세라믹의 압전 및 유전특성

이수호,손무헌,조현철,김한근,사공 건 東亞大學校 1997 東亞論叢 Vol.34 No.-

In the fields of the optics, precise machine, semiconductors, the micro-positioning actuators are required for the control of position in submicron range. PNN-PZN-PZT cermics were fabricated with various mole ratio of the PZT[Pb(Zr½ Ti½)O₃] PNN[Pb(Ni⅓Nb⅔)O₃]and PZN[Pb(Zn⅓Nb⅔)O₃]powders prepared by double calcination and PZT powders prepared by molten-salt synthesis method. The formation rate of perovskite phase in PNN-PZN-PZT ceramics could be obtained about 92% at PZT 0.3 mole ratio. The relative permittivity of specimen with PZT 0.3 mole ratio was shown 5,320 and appeared the relaxor ferroelectric feature. The maximum piezoelectric coefficient d₃₁to be used for evaluation the displacement of piezoceramics in PNN-PZN-PZT ceramics was 324×10¹²(C/V) at the vicinity of morphotropic phase boundary and was larger than that of solid PZT ceramics(120×10-¹²C/V).