특성화고등학교 학생들의 과학 수업에서의 흥미에 관한 내러티브 연구: 전공 교과목과의 비교를 중심으로

장준규 ( Jun-kyu Chang ),이준기 ( Jun-ki Lee ) 전북대학교 과학교육연구소 2023 과학과 과학교육 논문지 Vol.48 No.1

이 연구는 특성화 고등학교에 입학한 학생 4명의 자발적 참여를 통해 이루어 졌다. 이 연구 대상자들이 어떠한 부분에서 과학에 대한 흥미를 경험했고, 무엇이 과학에 대한 흥미를 잃게 되었는지에 대해 연구 참여자들의 관점에서 확인하고 분석하고자 내러티브 탐구 방법을 통해 깊이 있는 면담을 진행했다. 이 연구의 목적은 특성화 고등학교 학생들이 과학에 흥미를 잃게 하는 다양한 요인들을 파악하는데 있다. 본 연구의 주요 결론을 제시하면 다음과 같다. 첫째, 연구 참여 학생들은 초 · 중학교시기에 연구 참여 학생들은 과학에 대한 흥미를 어느 정도 가지고 있었지만 특성화 고등학교에 입학 후 잃게 되었다. 둘째, 학생들이 과학교과에 흥미를 느낄 수 있게 해주는 환경이 조성되지 못했다. 결론을 종합하면 연구 참여 학생들은 과학교과에 대한 필요성을 인지하고 있음에도 불구하고, 과학교과에 대한 흥미를 느끼지 못해 수업에 집중할 수 없었다. 또한 연구 참여학생들의 과학교과는 일관적인 이론수업으로 진행되었고, 그 과정에서 학생들의 이해도는 고려되지 않았다. 결국 학생들은 과학교과에 대해 어려움을 느꼈고 흥미를 잃게 되었다. This study was conducted through the voluntary participation of four students who entered a vocational high school. The purpose of this research was to identify various factors that cause students at vocational high schools to lose interest in science, by examining and analyzing from the perspectives of the research participants which parts of science they experienced an interest in and what caused them to lose interest. In-depth interviews were conducted using narrative inquiry method. The main findings of this study are as follows. First, the participating students had some interest in science during their elementary and middle school years, but lost it after entering the vocational high school. Second, the environment that allows students to develop an interest in science was not provided. In conclusion, although the participating students were aware of the importance of science, they could not focus on class because they did not have an interest in science. In addition, their science classes consisted of consistent theoretical lessons, without considering the students' level of understanding. As a result, the students found science classes difficult and lost interest.

韓國古代諧謔文學論攷

전규태 연세대학교 인문과학연구소 1971 人文科學 Vol.24-25 No.-

In the study of literature in our country, no great attention has been directed to the clear definition of the concept of humor and the intensive exploration of the area of humor. The problem has been discussed, but desultorily, since the P.E.N. meeting held in Seoul in July, 1970. This article is an attempt to ascertain a characteristic of Korean literature through the study of essential elements of humor and its peculiar significance for the Koreans. It is often said that Korean literature is lacking in “laughter.” Most of the Korean literary classics are characterized by their pathos arising from seclusion from the world, despised love, separation from the beloved, nostalgia for bygone days, self-indulgence in intoxication. It is because our ancestors were forced to live in sorrow, lamentation, curse and self-torment, since they were always threatened with external invasion and internal disturbance. It is manifest that out of this gloomy pathos of theirs has grown a humor peculiar to them. The humor to be found in our literature may be classified into two parts: one belongs to the type of “Chuyong-ga” in which the author resigns himself to the realities of life, and the other belongs to the type of “Kooji-ga” in which the author reconciles himself to the realities of life. This article has also confirmed the forms of humors, which are as good as those of any other peoples, contained in ancient Korean narrative literature, such ancient novels as “Baebijang-jun,”“Onggojip-jun,”“Shimchung-jun,” and “Koo Woon Mong,” and the “sijo” of the Yi Dynasty.

Effect of Impact Velocity on Interface Characteristics of HT‑9 Steel Joints Fabricated by Magnetic Pulse Welding

Jun‑Woo Song,Jin‑Ju Park,Gyoung‑Ja Lee,Min‑Ku Lee,Kyu‑Hyun Park,Soon‑Jik Hong,Jung Gu Lee 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.3

The weldability window in magnetic pulse welding (MPW) is proposed for the end-closure joining of HT-9 steel tubularworkpieces. Based on both theoretical and experimental investigations, the impact velocity of the flyer tube at the momentof collision had a dominant effect on the bonding characteristics of the resultant joints and the optimal impact velocity wasestimated to be in the range of 265–290 m/s in this alloy system. Under the optimal process conditions, no leak was detectedduring helium leak testing. Moreover, the integrity of the joint interface was preserved until the tube section ruptured duringinternal pressure burst testing. For HT-9 steel, the ductile δ-ferrite phase produced by the localized interfacial melting duringMPW acted as an effective obstacle to crack propagation, thereby enhancing the fracture resistance of the joint interface. Allof the results demonstrated the high integrity and durability of the HT-9 steel tube assembly fabricated by the MPW process.

Post mortem insect colonization and body weight loss in rabbit carcasses

Park Jun‐Kyu,Kim Chang‐Jun,Do Yuno 한국곤충학회 2020 Entomological Research Vol.50 No.12

This study considers the impact of various treatments of rabbit carcasses on post mortem insect colonization and weight loss. A statistically accurate time for the change in carcass weight and insect access time was determined using time series analysis depending on different carcass treatments that determined insect access. The decomposition stage was relatively short. Fifteen freshly killed white rabbits (Oryctolagus cuniculus) weighing between 2.5 kg and 4.5 kg were used as animal models in this study. Three carcasses were treated in each of five ways: normal, burnt, wrapped, hung, and immersed. A total of thirteen insect species were attracted to normal, burnt, and hung carcasses. Insects were not collected from sealed and immersed carcasses. The normal and burnt carcasses had a higher number of species and abundance compared to hung carcasses. The present study found no difference in insect colonization in normal and burnt carcasses. The determination of the weight of remaining carcass was clearly divided into the insect‐accessible (i.e., normal, burnt, and hung carcasses) and insect‐inaccessible carcasses (i.e., sealed and immersed carcasses), although no difference was found in the decrease in the rate of the remaining carcass in insect‐inaccessible carcasses.

The effect of neuropeptides on secretion of Interleukin-8(IL-8)

Kim, Kyung-Jun,Park, Sang-Hyuk,Choi, Kyoung-Kyu,Park, Sang-Jin 大韓齒科保存學會 2006 Restorative Dentistry & Endodontics Vol.31 No.3

본 연구는 치수조직, 치은, 치주인대로부터 배양된 조직을 SP (Substance P)로 4시간, SP, CGRP (Calcitonin Gene-related Peptide), Tumor necrosis factor-α (TNF-α)로 8시간 자극 후 RNase Protection Assay를 시행하고, IL-8의 분비량을 측정해 다음 결과를 얻었다. 1. IL-8 mRNA는 모든세포에서 발현됐다. 2. IL-8 mRNA 발현은 SP (10^(-5)M)와 SP (10^(-8)M)로 4시간 자극 시 증가되지 않았다. 3. IL-8 mRNA 발현은 SP (10^(-4)M)와 CGRP (10^(-6)M)로 8시간 자극 시 증가되지 않았다. 4. TNF-α (2 ng/㎖) 자극 시, IL-8 mRNA 발현이 증가됐다. 5. 치은 세포를 CGRP (10^(-6)M)로 8시간 자극 시, IL-8 분비량이 증가했다 (p < 0.05). 6. 치주인대 세포를 SP (10^(-4)M)로 8시간 자극 시 IL-8 분비량이 증가했다 (p < 0.05). We investigated the secretion of Interleukin-8 (IL-8) from ginviva and periodontal ligament stimulated with Substance P (SP) and Calcitonin Gene-related Peptide (CGRP). Gingiva (GF), periodontal ligament (PDLF) and pulp (PF) tissues were collected from extracted instact 3rd molars. Cultured cells were stimulated with different concentrations of SP for 4 hrs, and stimulated with SP, CGRP and Tumor Necrosis Factor-α (TNF-α) for 8 hrs. Then RNase Protection Assay was carried out. ELISA was performed using supernatants of stimulated cells for quantitative analysis of IL-8. Results were assessed using supernatants of stimulated cells for quantitative analysis of IL-8. Results were assessed using student t-test with significance of P < 0.05. According to this study, the results were as follows: 1. IL-8 mRNA was detected in all type of cells studied (PF, GF and PDLF). 2. IL-8 mRNA expression was not increased after stimulating 4 hrs with SP (10^(-5)M) and SP (10^(-8)M) compared with Mock stimulation in all type of cells studied. 3. IL-8 mRNA expression was not increased after stimulating 8 hrs with SP (10^(-4)M) and CGRP (10^(-6)M) compared with Mock stimulation in all type of cells studied. 4. TNF-α (2 ng/㎖) increased the expression of IL-8 mRNA in all kind of cells studied. 5. The secretion of IL-8 from GF was increased 8 hrs after the stimulation with CGRP (10^(-6)M) (p < 0.05). 6. The secretion of IL-8 from PDLF was increased 8 hrs after the stimulation with SP (10^(-4)M) (p < 0.05). Calcitonin Gene-related Peptide (CGRP) increased Interleukin-8 (IL-8) which plays an important role in chemotaxis of neutrophil in Calcitonin Gene-related Peptide (CGRP) gingival tissue, whereas Substance P increased the secretion of IL-8 from periodontal ligament.

S-344 : The Role of Skeletal Muscle Mass in Development of Metabolic Syndrome

( Byung Sam Park ),( Jun Sung Moon ),( Ji Sung Yoon ),( Kyu Chang Won ),( Hyoung Woo Lee ) 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1

Introduction: It has been well known that abdominal adiposity is related with insulin resistance and greater risk of metabolic disorder. Skeletal muscle plays central role in insulin mediated glucose disposal of whole body, but we only know a little about the association between skeletal muscle mass and MetS (MetS). The aim of this study is to clarify the clinical role of skeletal muscle mass in developing MetS through using skeletal muscle parameters by body impedance analysis (BIA). Methods: 1,042 healthy adults aged from 20 to 75 years who visited Yeungnam university health promotion center from Jun. 2008 to Jun. 2010 were enrolled. 204 subjects who had prior MetS or chronic disease that can affect to skeletal muscle mass were excluded. After 24 months from baseline, the metabolic parameters were assessed and the development of MetS was diagnosed using modified NCEP-ATP III criteria. From the BIA (Inbody 720), we obtained skeletal muscle mass (SMM, Kg), body fat mass (BFM, Kg), and visceral fat area (VFA, cm2). Then, we had defined as follows; percent of skeletal muscle mass (SMM%, %): SMM (kg)/weight (Kg), skeletal muscle index (SMI, Kg/m2): SMM (Kg)/height (m)2, skeletal muscle to body fat ratio (MFR): SMM (kg)/BFM (Kg) and skeletal muscle to visceral fat ratio (SVR, Kg/cm2): SMM (Kg)/VFA (cm2) Results: Mean follow up periods were 28.7±5.4 months. Among total 838 subjects (46.9±9.9 years, M:F=477:361), 88 (10.5%) were newly diagnosed MetS. 5th quintile of the SMM%, MFR and SVR was associated with decreased risk of development of MetS after adjusting for confounding factors. Conclusion: Decreased skeletal muscle mass may play critical role in development of the MetS and not absolute amount of skeletal muscle mass but relative ratio to body composition may be more important.

手術과 感染

全奎榮 大韓法醫學會 1985 대한법의학회지 Vol.9 No.1-2

Postoperative wound infection is one of the most common complication surgical practice primarily depends upon the healing of wounds without serious complications, and infections occurring in postoperative wounds can have significant effects on the patient's morbidity, prolongation of convalescence, unpleasant dressings, ugly scars and cost of medical services. The severity of nosocomial infection has increased with following problems, e.g., complexity of hospital, antibiotic abuse, use of immunosuppressive agent, malnutrition, increment of chronic disease, use of invasive devices and multiplicity of operations. Efforts to decrease the incidence of wound infection postoperatively have included modification of the operating room procedure, methods of preparation of the surgical field, skillful operation, prophylactic systemic antibiotics and delayed closure of contaminated wound.

[논문]셀 제조시스템의 설계기법

조규갑,황호준 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-

셀 제조시스템의 설계에서 가장 증요한 과제는 부품꾼과 그 부품군에 속하는 모든 부품을 가공하는 기계군을 형성하는 제조셀설계문제이다.본논문에서는부품 생산량, 기계 능력, 대안공정 계획 및 셀간부하평준화를 고려한 제조셀의 형성에 대한수리적모형을 고찰하고, 셀 설계 방법으로 유전자 알고리즘과 타부 탐색으로 구성된 하이브리드 접근방법을 개발하였고, 예제를 사용하여 제안된 방법의 타당성을 검증하였다.

[논문]회분식 화학공정의 공정감시를 위한 자동화 시스템 개발

안영준,안대명,황규석 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-

현재 대부분의 국내 화학 공장 에서는 반응기의 자동 제어를 위해서 PLC(Prograrnmable Logic Controller)를 사용하고 있지만 성능에 비해 고가라는 단점이 있다. 이에 반해,16bit Micro- controller 인 80C196KC는 CPU, 입 · 출력장치 둥이 One Chip에 내장되어 있으므로 소형이며, 가격 대 성능비가 뛰어나 중 · 소형 화학반응 공정의 자동 제어에 적합하다고 할 수 있다. 본 연구에서는 다양한 산업분야의 자동화에 사용되고 있는 INTEL사의 16bit Microcontroller인 80C196KC를 사용하여 회분식 화학반응기의 자동화 시스템을 개발하고, 또 인터넷을 이용하여 원격감시와 제어가 가능하게 하였다.

Cadmium Chloride가 Mouse 의 췌장도 β-세포에 미치는 영향

전영희,백태경,정호삼,이규식,김영호 한양대학교 의과대학 1993 한양의대 학술지 Vol.13 No.1

As the industrial use of cadmium has become more common, the question of its toxicity has become more important. The present was undertaken to study effects of cadmium on the structure of β-cells in the Langerhans islet of the mouse pancreas. Healthy mice of ICR strain weighing around 39gm were used in this experiment. The each animal of the experimental group was interperitoneally administrated cadmium chloride 5.0mg/kg diluted in the water for injection. The experimental animals were sacrified at 3, 6, 12, 24, 48 and 72 hours after administration of cadmium chloride and pancreatic tissues was excised. Some specimens were stained with Halmi stain to observe the morphological changes in the endocrine portion of the pancreas, the islet of Langerhan, and the others were prefixed in the 2.5% glutaraldehyde-2% paraformaldehyde phosphate buffer solution (pH7.0) and postfixed in the 1% osmic acid. Ultrathin sections were made and double strained with uranyl acetate and lead citrate. These preparations were observed with light microscope and electron microscope as well. The results obtained were as follow; 1. The number of β-cells throughout the pancreatic islets were markedly reduced in the 12 hours group and the β-cells were increased slowly in the 24 hours group. 2. The cristae of mitochondria disappeared and electron-density of matrix in mitochondria is decreased in the 3 hours after treatment of animals with cadmium chloride. The mitochomdria appeared almost like normal group, in the 12 hours group. 3. The cisternae of rough endoplasmic reticulum were dilatated in the 3hours group and change in rough endoplasmic reticulum were completely restored to normal in the 24 hours group. 4. The Golgi complexes were very hypertophied in the 3 hours. The Golgi complexes were observed like normal group, in the 12 hours group. 5. The sectetory granules were hypertrophied a halo and loss a dense core and the electron dense core and the electron dense of core in secretory granules decreased in the 3 hours, 12 hours group. But the secretory granules were slightly restored in the 48 hours group and appeared almost like normal group in the 72 hours group. Consequently, it is concluded that cadmium chloride exerts several toxic effects to β-cells of Langerhan's islet, especially, the damage to secretory granule in mouse.