부동산 분양광고의 소비자인식 차이에 관한 연구 : 아파트분양광고를 위한 영상매체와 비 영상매체의 비교를 중심으로

신상식 호서대학교 벤처전문대학원 2006 국내석사

Even though newspapers are still playing an important role, because the change of advertising environment such as development of communication skills, popularization of digital media, personal computers, and the internet, spread of cable TV and satellite broadcasting, and realization of ubiquitous environment is diversifying the option of advertisement media to attract customers, the impact of newspapers on customers is decreasing. Therefore, the suppliers of housing should adapt themselves to the change of advertising environment caused by the advent of the era of new media. In other words, to maximize the effectiveness of distribution by real estate advertisement, it is essential to select appropriate advertising media and to differentiate the marketing strategy for the advertisement. More importantly, all the advertisement should be backed by concepts which meet the needs of customers. Real estate affects customers’ overall lives a lot and customers’ decisions related with real estate are influenced so much by advertisement. Thus, advertisement as an important real estate marketing strategy can change according to the selection of advertisement media. This study divides drastically changing various advertisement media into image-media and non-image-media and analyzes the difference of the customers’ recognition for those two media groups. This study consists of 5 chapters and the contents of each chapter are as follows: chapter 1 is the introduction, chapter 2 reviews theoretical background such as the concept of image-media, real estate marketing, real estate distribution advertisement and prior researches. Chapter 3 describes research models and hypotheses and chapter 4 empirically analyzes 4 hypotheses such as the degree of preference for advertisement media and of trust for media, significance of media, and effectiveness of media. Chapter 5 summarizes and concludes this study. Important findings of this study are as follows. (1) Image-media is more preferred than non-image-media when customers seek for distribution information. (2) Image-media is more useful than non-image-media for information about apartment distribution and about economic, environmental, and administrative considerations. (3) Image-media is more effective than non-image-media in access to information and realism. (4) Image-media is better than non-image-media in the degree of trust to information conveyed. This study shows that because image-media advertisement better meets the needs of customers in a visual aspect than non-image-media advertisement by providing image information for the housing and other objective information which can affect customers’ decisions, it is more desirable to select image-media than non-image-media when constructing a distribution advertisement strategy. Therefore, It is important to differentiate and segment advertisement media by using image-media which is superior in a audio-visual aspect in the fast changing new media era.

고정화 활성슬러지를 이용한 시안화합물 분해에 관한 연구

김명희 朝鮮大學校 교육대학원 2006 국내석사

Cyanide is highly toxic to ecosystems, cyanide-containing effluents cannot be discharged without being subjected to treatment to reduce to very low levels (0.1 <mg dm-3 of CN-). To prevent the access of cyanide to ecosystems, many biological detoxifications of cyanide have been tried, for the biological system has been considered to be the most effective and ultimate method. Many microorganisms have an inherent capacity to degrade the toxic organic compounds that enter the environment as a result of pollution and natural activities. However, there are few examples of biological degradation for cyanide compounds in the field. The immobilization of a microorganism has been rapidly progressed with the development of bio-technology and it has been used as a tool to isolate products from biological media in various areas, it has not yet been practiced in the treatment of wastewater. This study has been optimized operating conditions removal to cyanide in a synthetic wastewater by PEG method with microorganisms immobilized. The immobilized activated sludge utilized of Ni(CN)42- as a nitrogen source. During cyanide degradation, ammonia and carbon dioxide were found as final products. The utilization of ammonia formed by Ni(CN)42- degradation was investigated by adding the glucose as carbon source. In the batch experiments, the effects of a substrate concentration, pH, amount sludge, phenol, bead packing volume, glucose, thiocyanate on the removal of cyanide compounds were investigated a maximum condition by immobilized activated sludge. The higher degradation activity was obtained at pH 7.0. In case that pH was beside 6~9, relative activity was dramatically decreased. The cyanide degradation decreased with increasing of initial cyanide concentration. Although cyanide degradation increased with increasing of glucose, phenol and SCN- . In continuous experiments operational conditions is HRT 48~24hrs, pH 8.0, bead 30%. The hydraulic retention time of 36hr, the higher degradation efficiency of cyanide was shown. As decreasing the hydraulic retention time further down to 24hr, the degradation efficiency of cyanide degreased to 90%. The removal efficiency of cyanide were 99%, while HRT was 36hrs.

경기 일부 지역 고등학생의 영양지식 수준에 따른 식행동 및 채식 섭취 관련 인식에 관한 연구

심혜리 수원대학교 2024 국내석사

수산 폐자원을 이용한 비소 및 중금속으로 오염된 토양의 안정화 효율 평가

박찬오 조선대학교 대학원 2021 국내박사

It is known that arsenic and heavy metals such as lead, copper and zinc generated from abandoned mines have low mobility and a high accumulation rate, which can adversely affect ecosystems and humans over a long period of time. Among contaminated soil remediation technologies, the stabilization/ solidification (S/S) technology is a method of lowering the mobility and exposure risk for pollutants such as heavy metals in soil through physicochemical reactions. The S/S method is widely used to stabilize pollutants such as heavy metals in the soil by sealing, precipitation, and adsorption using an alkali-based stabilizing agent. In addition, the S/S method has been shown to be economically feasibility, efficient and prevents secondary pollution. However, industrial by-products such as cement, cement kiln dust, and fly ash which are widely used for stabilization, have not been widely applied for stabilization efforts in recent years due to contaminant content and solidification issues. Looking at the trend of research on stabilization of contaminated soil, many studies using natural waste resources such as oyster shells and starfish are being investigated. Therefore, in this study, four species of fishery waste resources mainly produced and discarded in the southwest coast of South Korea {Cockle shell (CS), Golden cuttlefish born (GCB), Brown croaker born (BCB) and Starfish (Asterias amurensis, AA)} were used to evaluate the stabilization efficiency after application to contaminated soil to confirm their possible use as stabilizing agents. The 0.1M HCl extraction method was used to evaluate the stabilization efficiency. XRF and XRD analyses were performed to see the mineralogical properties and morphology, and SEM-EDX analysis was performed to identify the stabilization mechanism. XRF analysis showed that BCB contained a lot of phosphorus (P) with CaO at 67.1% of and P2O5 at 30.9%. Furthermore, AA contained CaO at 81.3%, MgO at 7.04%, and SO3 at 4.13%. In addition, XRD analys is showed that the CS and GCB were composed of Aragonite (CaCO3). Chlorapatite (Ca5(PO4)3Cl) was the main component in BCB, and Calcite((Ca,Mg)CO3) was the main component in AA. After stabilizing the contaminated soil using the fishery waste resource stabilizers, the stabilization efficiency for arsenic and heavy metals was evaluated and showed a high treatment efficiency of 92~99% for all arsenic, lead, copper and zinc components in the case of CS. In particular, the stabilization efficiency was much higher when -#20 mesh material was used rather than -#10 mesh material. It can be seen that the stabilizers with smaller particle diameters had a larger specific surface area and thus the stabilization efficiency was improved due to smooth hydration. GCB, like CS, showed a high processing stabilization efficiency of 95-99% for both arsenic and heavy metals. However, the stabilization efficiency was higher in the case of curing for 4 weeks rather than 1 week. BCB showed a stabilization efficiency of around 70% for lead and around 50% for copper, but showed very low stabilization efficiency (less than 50%) for arsenic and zinc. Therefore, BCB was considered too difficult to use as a stabilizing agent for As and Zn. Moreover, the change in heavy metal concentrations after stabilization with respect to particle size and curing period was also not significant. AA showed a high stabilization efficiency of over 90% for all of the arsenic, lead, copper and zinc components. In particular, the stabilization efficiency was high even with a curing period of 1 week, and the stabilization efficiency was high in both -#10 mesh and -#20 mesh material applications except for zinc. After the stabilization treatment, the arsenic and copper stabilization efficiencies for each stabilizing agent was found to be in the order of GCB>CS>AA>BCB. The zinc stabilization efficiency for each stabilizer was shown to be in the order of GCB>AA>CS>BCB, and the stabilization efficiency of BCB for arsenic and zinc was less than 50%. The lead stabilization efficiency for each stabilizer was shown to be in the order of GCB>CS≃AA>BCB. As a result of analyzing the stabilization mechanism using SEM-EDX analysis, effective stabilization of arsenic by CS and GCB showed that calcium-based solubility was significantly higher as identified in several previous studies. It is thought to be due to low Ca-As precipitation. Heavy metals such as lead, copper, and zinc have a very high correlation with Al, Si, and O as identified in several previous studies, which is believed to be due to the formulation of CSHs (calcium silicate hydrates) and CAHs (calcium aluminate hydrates), which are ozzolanic reaction products. In addition, effective stabilization of lead by BCB proceeds through the formation of lead phosphate compounds such as pyromorphite (Pb5PO4)3X,X=F,Cl,OH), which is a highly stable chemical species of lead and phosphorus. A close correlation between lead and P was also confirmed in the elemental mapping analysis result, which could be associated with stabilization due to the formation of pyromorphite. Overall, it is judged that the fishery waste resource stabilizing agents applied in this study can be used as an economical stabilizing agent in contaminated soil with arsenic and heavy metals if the content is appropriately selected according to the concentration of soil contamination.

ADAS를 위한 출발상황 판단 알고리즘

김선걸 국민대학교 일반대학원 전자공학과 전자공학전공 2018 국내석사

As interest in autonmous vehicles increases, functions of driver assistance systeas are evolving. Therefore, it is expeced that it will have a high effect on safety of driver as well as resolution of traffic congestion. In this paper, we proposed a departure situation alarm algorithm that conbines the front vehicle start alarm function and the traffic signal recognition function to inform the driver when the ego-vehicle should to go from the stop situation. The proposed front vehicle start alarm function detects the tail light area of the front vehicle and grasps the departure of the front vehicle hrough changes in the area of the tail light. And the proposed traffic light recognition function identifies the area of the traffic light and recognizes the start signal generated from the corresponding traffic light. These algorithm is designed using vision sensor. To detect several color effectively, we utilized the HSV color space. The proposed algorithm is expected to operate at embedded system environment that is installed after completed vehicle without any burden, because it eliminates the computationally intensive algorithm like machine learning method and gets effective performance with low computational complexity. 자율주행자동차에 대한 관심이 높아짐에 따라 여러 가지 운전자 보조 시스템 기능이 발전하고 있다. 이에 따라 운전자의 안전은 물론 교통체증의 해소에도 높은 효과가 있을 것으로 기대되고 있다. 본 논문에서는 정차 상황에서 전방 차량이 출발하였음을 알리는 전방 차량 출발 알림 기능과 교통 신호등 인식 기능을 합친 출발 상황 인지 알고리즘을 제안한다. 제안된 전방 차량 출발 알림 기능은 차량의 후미등 영역을 검출하여 후미등의 면적 변화를 통해 전방 차량의 출발을 파악하며, 교통 신호등 인식 기능은 신호등의 영역을 파악하여 해당 신호등에서 발생하는 출발 신호를 인식한다. 본 알고리즘은 영상 센서를 이용하여 고안되었으며, 색상을 효과적으로 검출하기 위해 HSV 색상공간을 활용한다. 제안 알고리즘은 계산량이 많은 기계학습 방식을 배제하여 적은 연산량으로 효과적인 성능을 끌어내어 완성차량 이후에 설치되는 장치에서도 큰 부담 없이 동작할 수 있을 것으로 기대된다.

폐광산 광미에 함유된 비소의 포집에 관한 연구

양희문 조선대학교 대학원 2017 국내석사

This study was carried out with various solvents for the acquisition efficiency of arsenic gas contained in tailings. The solvents used in this experiment are Silver diethyldithiocarbamate solution((C2H5)2NCS2Ag), Ethanol(C2H5OH), Methanol(CH3OH), Acetone(CH3COCH3), Water, Phosphoric acid(H3PO4), Chloroform(CHCl3), Ammonia water(NH4OH), Sodium hypochlorite(NaClO), Perchloric acid(HClO4), Hydrochloric acid(HCl), Sulfuric acid(H2SO4) and Nitric acid(HNO3). As a result, it was confirmed that diethyldithiocarbamate acid absorbed arsenic gas at a concentration of 1.0 mg/L, with 100% of the gas absorbed. The highly volatile solvent had low persistence when compared with the acquisition efficiency. A high arsenic concentration of 5.0 N HNO3 was absorbed at an efficiency of about 100%, which demonstrates that diethyldithiocarbamate acid’s acquisition efficiency and, persistence were excellent. In addition, the experimental results show that increasing concentrations of HNO3 lead to increased acquisition efficiency. Under optimum conditions, when the abandoned mine tailings were used, a capture rate of 45.92% was obtained by acquisition of 1,372.4 mg/L from total arsenic concentration of 2,989 mg/kg.

마이크로웨이브로 처리한 폐주물철을 이용한 크롬 제거 증진에 관한연구

박진영 조선대학교 2016 국내석사

Abstract A study on enhancement of chromium removal using waste cast iron treated by microwave By: Park, Jin Young Advisor: Prof. Cheong Kyung-Hoon Ph. D Department of Environmental Engineering Graduate School of Chosun University A laboratory experiment was performed to the Cr6+ removal from wastewater using waste cast iron (WCI) and waste cast iron treated by microwaves (M/W WCI) The removal efficiency of Cr6+ was influenced by pH range (pH 2~12) and the efficiency was higher in lower pH conditions. The optimum Cr6+ removal was observed in the pH 2. The removal efficiency of Cr6+ was increased with increasing of dosage of WCI and M/W WCI. Adsorption equilibrium data of Cr6+ on WCI and M/W WCI reasonably fitted Langmuir isotherm model. The adsorption reaction can be described by the secondary-order reversible reaction. The adsorption energy obtain from D-R model for WCI and M/W WCI was 28.86 and 21.32 kJ/mole respectively at 25℃ indicating a chemisorption processes as primary adsorption mechanism.

급속 응집 시스템을 이용한 합류식 하수도 월류수의 인 제거

최임철 조선대학교 2015 국내석사

The aim of this study was to investigate the removal of phosphorus in Combined Sewer Overflow(CSO) using rapid coagulation system(tubular reactor + dissolved air flotation of waterway variability). Jar test and tubular reactor test were performed to examine the phosphorus removal in synthetic wastewater for optimal operation conditions of rapid coagulation system. For comparison, jar test and tubular reactor test were also conducted with reality wastewater. Dissolved air flotation of waterway variability was performed to determine the phosphorus removal under optimal operation conditions through the jar test and the tubular reactor test. Results showed phosphorus removal of 52.43 ~ 98.87 %, indicating that the jar tests under synthetic wastewater were conducted successfully. The optimal phosphorus removal condition of jar test under synthetic wastewater was observed 1% PAC of 1.5mL/L, pH of 6~7 and anion polymer of 20mL/L. In the case of reality wastewater, phosphorus removal rate lower than in the case of Synthetic wastewater. The results of tubular reactor test under various flow rate demonstrated that phosphorus removal increased with increasing flow rate. The dissolved air flotation of waterway variability test results showed phosphorus removal was effective. This study demonstrated that coagulation system(tubular reactor + dissolved air flotation of waterway variability) could be used as treatment system for the removal of phosphorus in Combined Sewer Overflow. 비점오염원은 토지표면에 축적된 오염물, 토양의 침식, 흙덩이, 강우유출량의 증가, 대기 중의 오염물질, 부유물질, 용존성 오염물질, 인간의 활동에 의한 오염물 등이 강우에 의해 유출되어 발생된 오염원이다. 그렇기 때문에 비점오염원은 일정한 유출경로가 없는 오염원을 말한다. 비점오염원은 오염물질의 유출이 강우 시에 집중적으로 발생하고, 오염지역이 넓게 분산되어 있으며, 강우 초기에 오염물질이 유출되는 초기우수 유출수(first-flush)는 불투수성 도로나 지표에서 퇴적물의 세척으로 인한 오염물과 대기 중의 오염물질을 함유하여 오염물질의 농도가 높고, 도시지역의 경우 중금속 등의 독성물질을 함유 할 가능성이 높다. 강우로 인하여 우수가 하수관거, 빗물펌프장 및 하수처리시설에서 처리되지 못하고 하천이나 수역에 월류되는 하수를 합류식 하수도 월류수(CSOs)라 하며, 그 발생원이 비점오염원의 특성을 지님과 함께 초기우수유출수를 포함하여 높은 오염도를 지니고 있다. 이러한 비점오염원이 미처리된 상태로 방류되면 수계 접촉으로 인한 위생오염과 상수원으로 이용되는 하천의 오염, 호소의 부영양화 등의 피해를 야기한다. 이에 따라 효율적인 수계 환경 보전을 위하여 점오염원의 관리와 함께 초기우수를 포함한 비점오염원에 대한 관리가 필요하다는 인식이 대두되었다. 비점오염원 관리를 위한 일환으로 저류, 침투, 식생, 인공습지 등을 이용한 자연형 시설과 여과, 와류, 스크린, 응집, 생물학적 처리 방법을 이용한 장치형 시설 등이 저감시설로서 운영되고 있다. 응집·침전을 이용한 장치형 시설은 응집제를 사용하여 응집 후 침전시켜 오염물질을 분리시키는 시설로 고형물에 대한 처리효율이 높고 응집제 종류에 따라 부영양화 물질인 인에 대한 높은 제거율을 볼 수 있어서 오염도가 높은 초기우수를 급속처리하기 용이하다. 이를 적용하여 응집·침전을 이용한 장치 시설로 응집제의 완전혼합을 유도하는 관형반응기와 응집된 플럭과 처리수를 분리하는 가압반응조를 조합한 급속 처리 시스템이 제시되었으나 그 효율에 대한 연구는 부족한 실정이다. 따라서 본 연구에서는 합류식 하수도 월류수의 인 처리를 위해 관형반응기와 가압부상조를 복합한 시스템을 구축하고, 회분실험을 통해 응집 최적 조건을 구하고 시스템 운영 결과를 분석하여 구축한 시스템의 인 제거 효율성에 대하여 검토하고자 한다.

납석을 이용한 하수 중의 인 제거

양해종 조선대학교 2015 국내석사

Recently, the concentration criteria of phosphorus in domestic wastewater has been greatly reduced to 0.2 ~ 0.5 mg/L. This will cause problems with the removal of phosphorus and Anoxic-oxic activated sludge at existing wastewater facilities because of seasonal factors and stronger regulations. In order to solve this problem, physical and chemical phosphorus removal by coagulant should be used. However, there may be many problems with phosphorus removal by these coagulants (flocculent, THM, etc.) including the creation of sludge, which would be an economical problem. One way to solve these problems is the use of a natural coagulant. In this paper, the phosphorus removal mechanism from domestic wastewater using pyrophyllite was investigated. In this experiment, pyrophyllite with a particle size of 840 ~ 1300 ㎛ and pyrophyllite with a particle size less than 420 ㎛ were treated at different temperatures (100℃ ~ 900℃). The experiment showed that pyrophyllite treated at 600℃ with a particle size of 840 ~ 1300 ㎛ had a higher phosphorus removal efficiency and pyrophyllite with a particle size less than 420 ㎛ should also have a high removal efficiency without heat treatment. The removal efficiency of phosphorus was influenced by pH range and the efficiency was higher in higher pH conditions. The removal efficiency of phosphorus increased with increasing adsorbent dosage with respect to a phosphorus source of a low concentration PO4-P solution. In the continuous experiments, pyrophyllite with a particle size of 840 ~ 1300 ㎛ removed the 1,800 mL PO4-P solution in 10 mL/min and the 1,500 mL PO4-P solution in 20 mL/min. The process of uptake obeys both Langmuir and Freundlich isotherms. Batch adsorption studies have shown that the adsorption reaction could be described by the second-order reversible reaction.

저가형 탄화수소막을 이용한 미생물 연료전지의 전기생산 특성

권해훈 조선대학교 대학원 2016 국내석사

Microbial fuel cell (MFC) is a new type of energy converter that converts the chemical energy in organic materials to electrical energy through microbial catalysis. The MFC can be used as a source of sustainable energy because it can produce electrical energy from organic contaminants by the treatment of wastewater or waste. The essential components of an MFC are anode chamber, cathode chamber, and proton exchange membrane (PEM). The PEM sends H+ ions generated in the anode chamber to the cathode chamber, while simultaneously increasing the energy conversion efficiency by restricting oxygen delivery. The Nafion membrane is widely used as a PEM in fuel cells owing to its excellent oxidation resistance, and alkali resistance at high temperatures. However, the Nafion membrane is high-priced and has a low selectivity for H+ ions. Thus, the development of a new cost-effective PEM that can replace the expensive Nafion membrane is required. In this study, a low-cost hydrocarbon membrane, was prepared by the sulfonation process using poly(2,6-dimethyl-1,4-phenylene oxide) for use as a PEM instead of the expensive Nafion membrane. The properties of this hydrocarbon membrane such as the amount of electricity generated and the wastewater treatment characteristics were examined by applying it to the MFC process. When the low-cost hydrocarbon membrane produced in this study was compared with the commercial Nafion 117 membrane, the hydrocarbon membrane showed better dimensional stability to changes in temperature and lower water contents compared to the commercial Nafion 117 membrane. Therefore, the hydrocarbon membrane is expected to exhibit excellent mechanical properties in the fully hydrated condition. The electricity generated and the wastewater treatment characteristics of the low-cost hydrocarbon membrane were analyzed by applying it to a continuous MFC process as the PEM. After an adaptation period of six days in the early stage of the operation of microorganisms, a maximum voltage of 498 mV was obtained on day 7, which was maintained stably for a long period. Furthermore, the chemical oxygen demand removal efficiency increased to 75.8% after seven days of operation, and the removal efficiency remained stable for a long period. The long-term stable operation of the MFC is attributed to the accretion of microorganisms to the anode and the effective formation of microbial films. Therefore, the low-cost hydrocarbon membrane prepared in this study exhibits great potential to replace the expensive Nafion membrane as the PEM of the MFC for long-term operation.