Cellulose acetate (CA) has been used for microfiltration/ultrafiltration applications because of its good solubility in common solvents. However, it is sensitive to chemical and physical degradation. Therefore, in this study, cellulose acetate was crosslinked with terephthaloyl chloride (TPC) in dimethylacetamide (DMAc) solution to complement these weakness. Cross-linking was confirmed by increasing in dope solution viscosity and FT-IR. To indicate the chemical resistance, weight loss was observed after the cross-linked CA membranes were immersed in ethanol, hexane, acetone and DMAc solvent for 24h. The physical properties were evaluated by the tensile strength. In the result of experience, effect of the degree of cross-linking by increasing of the concentration of TPC improved the chemical and physical properties of CA.

낙동강 하구역 조간대의 보존 및 관리를 위한 기초적 연구로, 낙동강 하구 조간대를 대상으로 지하수의 물리적 특성 및 퇴적물의 성상을 조사하였다. 조간대의 지하수위 및 지하수온의 변화는 조석에 영향을 받으며, 5,000 m³/s 이상의 하천수 방류는 조간대의 지하수위를 상승시킬 뿐만 아니라 지반 내 수십 cm 깊이의 지하수 염분을 감소시키는 것으로 조사되었다. 간조 시 조간대 지하수위의 하강 형태는 조간대 퇴적물의 세립질 함량에 따른 투수도 차이에 영향을 받는 것으로 나타났다. 또한 높은 투수도의 조간대 지반에서는 활발한 지하수 흐름에 의해 세립질의 퇴적이 감소하고 재부상이 증가하여 결과적으로는 낮은 세립질 함량의 조간대 지반을 형성하였다.

Purpose : Ophthalmic soft contact lens using functional silicone monomer were manufactured and the physical properties of copolymerized materials were analyzed. Methods : The materials for ophthalmic hydrogel contact lenses were polymerized by adding 1,3-bis(TDS) and acrylated poly-(dimethyl siloxane) to DMA, HEMA and cross-linking agent(EGDMA) which are commonly used in ophthalmic hydrogel contact lenses. The hydrogel ophthalmic lens was manufactured by cast mould method. The manufactured ophthalmic hydrogel contact lenses were stored in a 0.9% NaCl normal saline for 24 hrs. And also, for the utility of functional silicone monomer as a high gas permeability and visible light transmittance material for ophthalmologic devices, the oxygen permeability, spectral transmittance and water contact were measured. Results : The value of oxygen permeability ranges from 16.83 to 36.59 x    ×     sec ×  ×   . The results showed that the average value of water content decreased as the ratio of additive increased. The visible light tansmittance of copolymerized ophthalmic soft contact lenses, was in the range 89~ 92%. Conclusions : The material containing acrylate poly-(dimethyl siloxane) and methacrylate siloxane is expected to be used usefully as a material for high oxygen permeability hydrogel contact lens.

Interpreting ultraviolet-to-infrared (UV-to-IR) observations of galaxies in terms of constraints on phys- ical parameters - such as stellar mass (M*) and star formation rate (SFR) - requires spectral synthesis modelling. We investigate how increasing the level of sophistication of the standard simplifying assump- tions of such models can improve estimates of galaxy physical parameters. To achieve this, we compile a sample of 1048 galaxies at redshifts 0:7 < z < 2:8 with accurate photometry at rest-frame UV to near-IR wavelengths from the 3D-HST Survey. We compare the spectral energy distributions of these galaxies with those from different model spectral libraries to derive estimates of the physical parameters. We find that spectral libraries including sophisticated descriptions of galaxy star formation histories (SFHs) and prescriptions for attenuation by dust and nebular emission provide a much better representation of the observations than `classical' spectral libraries, in which galaxy SFHs are assumed to be exponentially declining functions of time, associated with a simple prescription for dust attenuation free of nebular emission. As a result, for the galaxies in our sample, M* derived using classical spectral libraries tends to be systematically overestimated and SFRs systematically underestimated relative to the values derived adopting a more realistic spectral library. We conclude that the sophisticated approach considered here is required to reliably interpret fundamental diagnostics of galaxy evolution.

In this paper we introduce the Plasma Physics of Active Galactic Nuclei project, which is an ongoing experiment with Korean VLBI Network (KVN) and KVN and VERA Array (KaVA) to study multi- frequency polarimetric properties on parsec scales of active galaxies. The goal of the project is to improve our understanding of fundamental jet physics, especially evolution of the relativistic out ow coupled with the large-scale magnetic field. We selected six radio-loud AGN as our targets. So far we (i) detected resolved emissions regions at 86 and 129 GHz on VLBI scales, (ii) constructed 2D spectral index maps of the out ows, and (iii) found polarizations at 22 and 43 GHz for a few targets. Here we present spectral index distributions of 3C 120 between 22 and 43 GHz and a linear polarization map of BL Lac at 43 GHz obtained with KVN.

We have carried out optical spectroscopic measurements of emission lines for a sample of Galactic plan- etary nebulae with Wolf-Rayet (WR) stars and weak emission-line stars (wels). The plasma diagnostics and elemental abundance analysis have been done using both collisionally excited lines (CELs) and optical recombination lines (ORLs). It was found that the abundance discrepancy factors (ADF = ORL/CEL) are closely correlated with the difference between temperatures derived from forbidden lines and those from He i recombination lines, implying the existence of H-deficient materials embedded in the nebula. The Hβ surface brightness correlations suggest that they might be also related to the nebular evolution.

Objective : Dementia prevention program has been applied in Center for dementia by the occupational therapists. We evaluated the efficacy of this program to the elderly non-demented women in senior citizens center for cognitive, physical function and depression.Methods : We applied this program to women subjects from a senior citizens centers in 12 sessions. Cognitive and physical functions and depression were compared between pre and post-intervention with Korean Mini-Mental State Examination (K-MMSE), Timed-Up and Go test (TUG), One Leg Standing Test (OLST) and Geriatric Depression Scale Short Form-Korea version (GDSSF-K).Results : We enrolled 26 non-dementia women from four senior citizens centers in Seoul Yangcheon-gu. The K-MMSE improved after the dementia prevention program significantly (p=.00). The GDSSF-K was significantly different between pre and post-intervention (p=.02). For physical function, TUG (p=.02) and OLST in opening eyes were significantly improved (respectively, p=.00 in right side, and p=.00 in left side). OLST in closed eyes were tend to be improved after the intervention, however, they were not significantly different.Conclusion : The dementia prevention program of Center for dementia has proved to improve cognitive and physical function and to reduce depression in the non-demented women from senior citizens centers. These findings suggest that the dementia prevention program that has led by occupational therapist in Center for dementia can be applied other setting in a community.

One of the most usual indicators to measure the performance of any inventory policy is the mean physical stock. In general, when estimating the mean physical stock in periodic review inventory systems, approximate approaches are often utilized by practitioners and researchers. The mean physical stock is generally calculated by a simple approximation. Still these simple methods are frequently used to analyze various single stockpoint and multi-echelon inventory systems. However, such a simple approximation can be very inaccurate. This is particularly true for low service levels. Even though exact methods to calculate the mean physical stock have been derived, they are available for specific cases only and computationally not very efficient, and therefore less useful in practice. In literature, approximate approaches, such as the simple, the linear, and Simpson approximations, were derived for the periodic review inventory systems that allow backorders. This paper modifies the approximate approaches for the lost sales case and evaluates the modified approximate approaches. Through computational experiments, average (and maximum) percentage deviations of mean physical stock between the exact method and the modified approximations are compared in the periodic review inventory system with lost sales. The same comparison between the modified and the original approximations are also conducted, in order to examine the performance of modified approximations. The results show that all modified approximations perform well for high service levels, but also that the performance may deteriorate fast with decreasing service level. The modified Simpson approximation is clearly better. In addition, the comparison between the modified and the original approximations in the periodic review inventory system with lost sales shows that the modified approximation outperforms the original approximation.

The purpose of this study was to identify the effects of mechanical traction applied to the knee joint on pain, knee range of motion (ROM), timed up and go (TUG) and Western Ontario and MacMaster Universities Osteoarthritis (WOMAC) in patients with knee osteoarthritis (KOA) of Kellgren-Lawrence radiological rating scale Ⅱ or Ⅲ. Twenty three patients participated in the experiment for a period of four weeks. After baseline assessment, the patients with KOA were randomized into two groups: the traction group (n1=12), which received traction with general physical therapy; and the control group (n2=11), which received general physical therapy only on unilateral knee joints. Patients received interventions once a day, three times a week, for four weeks. Wilcoxon signed-rank test was used to analyze the change of dependent variances within the group during pre and post intervention. Mann-Whitney U test was used to analyze the change of dependent variances as TUG and passive ROM between the two groups. Analysis of covariance was used to analyze the change of dependent variances as numeric pain rating scale (NPRS) and WOMAC score between the two groups. In Wilcoxon signed-rank test, the traction group improved significantly with regard to NPRS (p<.01), passive knee flexion ROM (p<.01), passive knee extension (p<.05), TUG (p<.01) and WOMAC scores (p<.01) after intervention for four weeks, but not for the control group. In the Mann-Whitney U test and analysis of covariance, no significant difference was seen among all the dependent variances after intervention for four weeks between the two groups. These outcomes suggest that further studies should be carried out to determine the effects of mechanical traction prior to using it for the treatment of patients with knee osteoarthritis.

인공용승구조물 설치 전·후 주변해역의 하계 물리환경특성을 조사하였다. 구조물 설치 전(2002년)의 수온구조는 수심 30m에 강한 성층이 형성되었다. 한편 구조물 설치 3~4년 후(2012, 2013년)의 수온구조는 조류방향에 따라 구조물에 의한 성층의 형성수심 및 세기가 변화하였다. 이와 같은 현상은 구조물에 의한 연직류의 효과로 하계 강한 성층에 의해 저층에 분포하는 저수온수가 상승류에 의해 부상하여 성층분포에 영향을 미친 것으로 판단한다. 또한 구조물 설치 이후 연직류의 분포를 보면, 구조물 중심으로 국지적인 상승류 및 하강류가 혼재하여 나타났다. 즉 연직류는 조류방향에 따라 시·공간적인 변화를 보이면서 흐름이 진행하는 방향의 구조물 후면부에서 형성하는 상승류에 의해 성층이 약화되는 현상을 볼 수 있다. 또한 구조물에 의해 발생하는 연직류는 보다 넓은 해역으로 확장하여 발생한다. 본 연구해역에 설치한 인공용승구조물에 의해 발생하는 국지적인 용승은 한국 남동해안에 나타나는 연안 용승에 비해 유량이 100배 이상 크게 나타났다. 이와 같이 구조물에 의해 발생하는 상승류는 하계 저층에 존재하는 고농도의 영양염을 표층으로 상승시켜 주변해역의 기초생산량을 증가 시키는 역할을 가능하게 한다.

이 논문은 산지계류를 횡단하여 개설된 작업로가 계류환경의 물리적 변화에 미치는 영향을 파악하고, 이를 조절하기 위하여 시공된 버트리스식 사방댐의 영향에 대하여 검토하였다. 그 결과, 작업로 개설 이후에는 열악한 수문조건, 즉 적은 강우량, 약한 강우강도와 소류력에도 불구하고 작업로 개설 이전에 비하여 극심한 계상변동 및 계상재료의 입경변화가 나타났다. 이는 작업로가 계류를 횡단하여 개설됨에 따라 계상의 저사공간이 파괴됨으로써 자갈이나 호박돌 등의 조립질층과 이들 사이에 분포하던 세립질 토사가 선택적으로 이동 및 재분포하였기 때문인 것으로 사료된다. 이와 같은 계상변동 및 계상재료의 변화는 버트리스식 사방댐의 존재여부와 이에 포착된 계상재료의 성분별 포착순서에 크게 영향을 받을 것으로 판단된다. 따라서 임산물 반출의 편의성을 중심으로 한 작업로 개설의 문제점 해결과 재해에 강한 작업로 개설을 위한 지침을 마련하여야 할 것이다.

Experimental design with pellet heating time of 1.00, 1.33, 1.67, 2.00, 2.33, 2.67, 3.00, 3.33, 3.67, and 4.00 min was studied to investigate the effects of pellet heating time on the physical properties (expansion ratio, density and breaking strength) of vacuum-puffed Yukwa. The size and shape of vacuum-puffed Yukwa varied with respect to the pellet heating time.As pellet heating time increased, a values and b values tended to increase. The maximum expansion (4.626) with the lowest bulk density (0.112) was obtained at 3.33 min heating time, whereas the minimum expansion (2.954) with the highest bulk density (0.208) was found at 1 min. The breaking strength of vacuumpuffed Yukwa decreased significantly as the pellet heating time increased. Overall, the heating time had significant impacts on the physical properties of vacuum-puffed Yukwa.

건강기능성 물질을 함유하며 고유의 색과 향미를 가지는 유색감자 홍영 분말을 첨가한 반죽 및 면의 물리화학적 특성을 확인하였다. 홍영 미세 분말은 ball-milling을 통하여 제조하였으며, 매우 낮은 입자도로 인하여 감자의 세포 및 전분 구조가 파괴되어 손상 전분의 함량이 높았다. 이 같은 손상 전분은 낮은 온도에서 물을 흡수하고 팽창하는 성질이 높아 일반 분쇄를 통하여 얻은 분말로 제조한 반죽에 비하여 BM 분말을 반죽에 첨가하였을 때 탄성이 높고 자유수가 적은 반죽 및 면이 제조되었다. 입자 크기를 달리하여 분쇄한 홍영 분말의 경우 손상 전분이 아닌 첨가 분말의 표면적에 의하여 영향을 받으므로 입자 크기가 클수록 반죽 내의 자유수가 많아 열처리 시 더 많은 호화가 발생하였다. 홍영 분말을 첨가한 경우 홍영 특유의 붉은색이 증가함을 확인하였으며, 홍영 분말의 입자 크기가 커질수록 적색도가 감소하였다. 홍영 분말의 다양한 입자 크기에 따라 손상 전분의 발생 및 입자의 표면적에 의하여 서로 다른 호화 특성 및 면 반죽의 조직감을 나타내었다. 본 연구 결과를 통하여 미세 분말(BM)의 경우 손상 전분으로 인하여 생반죽의 탄성이 밀가루에 비하여 매우 높아 성형에 더 많은 힘이 필요함을 확인할 수 있었다. 따라서 미세 분말인 BM 분말과 다르게 생반죽의 성형이 용이하면서 홍영 특유의 붉은 색을 가장 잘 나타내며, 조리 이후 반죽의 탄성을 향상시키고 밀가루와 인장력에 유의차가 나타나지 않는 R1 및 R2 분말로 제조한 면이 우수한 품질을 나타냄을 확인하였다. 본 연구 결과는 전분을 함유하는 대체 분말을 이용한 제면 제품의 개발 시 입자 크기의 결정에 대한 기반이 될 수 있을 것으로 사료된다.

Two step rapid filter system as a pre-treatment for the injected water into aquifer storage and recovery (ASR) in Korea was developed to reduce physical blockage and secure the volume of the injected water. First, single rapid sand filters with three different media sizes (0.4~0.7, 0.7~1.0 and 1.0~1.4 mm) were tested. Only two sizes (0.4~0.7 and 0.7~1.0 mm) satisfied target turbidity, below 1.0 NTU. However, they showed the fast head loss. To prevent the fast head loss and secure the volume of the injected water, a rapid anthracite filter with roughing media size (2.0~3.4 mm) were installed before a single rapid sand filter. As results, both the target turbidity and reduction of head loss were achieved. It was determined that the media size for a rapid sand filter in two step rapid filter system (i.e. a rapid anthracite filter before a rapid sand filter) was 0.7~1.0 mm. In addition, the effects of coagulant doses on the removal of natural organic matter (NOM), which might cause a biological clogging, were preliminarily evaluated, and the values of UV254, dissolved organic carbon (DOC) and SUVA were interpreted.

creative innovation and an innovative problem-solving of industrial companies can be achieved by overcoming the challenges of technical and physical contradictions. The approaches to address conflicting and paradoxical problems, such as technical and physical contradictions have a crucial role in advancing the quality assessment for manufacturer and service provider. The term, technical contradiction, depicts the state that improvement of one ends of IFR (Ideal Final Result) leads to unfavorable condition of the other ends, and results in conflicting problem. Another type of contradictions that’s discussed in this study is a physical contradiction which is due to two mutually opposing states of the means of ends, and gives paradoxical situation. By integrating the means-ends chain perspectives, the physical contradiction that is a specifically root-causes, “means”, can be initially addressed to resolve the downstream problem of technical contradiction which represents a general and abstract goals, “ends”. This research suggests IFR resolution processes to handle both physical contradiction of means and technical contradiction of ends by employing causal relationship with IFR, effects and causes. n summary, the study represents three major processes that resolve such contradictions are demonstrated as follows: 1) Derivation of causal and hierarchical relationship among IFR, ends and means by considering CAED (Cause-And-Effect Diagram) and LT (Logic Tree). 2) Identification of causal relationship between physical contradiction and technical contradiction by using TPCT (TRIZ Physical Contradiction Tree) and TCD (Technical Contradiction Diagram). 3) Application of integrated TRIZ principles by classifying 40 inventive principles into 4 general conditions of the separation principle of mutually opposite states in space, in time, based on conditions, and between the parts and the whole. In order to validate the proof of proposed IFR resolution processes, the analysis of the TRIZ case studies from National Quality Circle Contest in the years, 2011 to 2014 have been proposed. The suggested guidelines that are built based on TRIZ principles can uniquely enhance the process of quality innovation and assessment for quality practitioners.

Since the conventional methods of physical therapy may decrease the motivation of a patient for rehabilitation due to repetitive, monotonous movement, a new physical therapy system inducing a motivation from the patient is needed. The present study is intended to develop a physical therapy serious game for enhancement of dynamic balance control. The balance control therapy game was developed by the following steps: (1) survey of existing balance control therapy systems, (2) analysis of balance control literature, (3) ideation and architecture planning of the balance control therapy game, and (4) implementation of the balance control therapy game. The proposed physical therapy serious game can provide better usability, satisfaction, clinical effectiveness for balance control than the conventional methods.

Membrane biofouling is the major concern to be addressed in membrane bioreactors (MBRs). Synergistic combinations of quorum quenching and physical cleaning methods were applied to minimize membrane fouling in MBRs. Different types of physical cleaning modes, such as relaxation, air backpulsing, and permeate backwashing were used in combination with quorum quenching. A significant improvement in fouling control was accomplished when QQ was coupled with physical cleaning methods, especially in relaxation. In addition, mixed liquor properties and treatment performances were not affected by the QQ activity. This research was supported by a grant (2012001440001) from the Korea Environmental Industry and Technology Institute funded by the Ministry of Environment.

This study is a part of high strength lightweight aggregate concrete researches using lightweight aggregates and the purpose of this study is to find out the basic physical characteristics and tension cracking fracture characteristics of lightweight concrete. Crack Mouth Opening Displacement is measured through three point flexure experiment about embellish notch beam. Load-CMOD characteristics are examined through rules of countries, characteristics of lightweight concrete and tension cracking fracture experiments. The degree of tensile characteristic alteration according to size changes of specimen and the characteristics about crack surface are analyzed. The changes of softening curve are analyzed and fracture energy is drawn through inverse analysis by the obtained Load-CMOD curve. To decide fracture energy and analysis parametric, inverse analysis is conducted and Ant Colony Method is conducted for optimization and then a way to find out optimal parameterization fracture energy is suggested.

본 연구는 계곡산개구리 산란지의 물리적 구조 및 음환경 특성을 밝히는데 그 목적이 있다. 연구대상지는 강원도 치악산국립공원의 주요 계곡을 대 상으로 총 46개의 계곡산개구리 산란지를 조사하였다. 연구 대상지를 세부적으로 구분하면 치악산국립공원 북부지역 구룡사계곡 13개소, 동부지역 부곡리계곡 17개소, 남부지 역 금대리계곡 9개소와 상원사계곡에서 6개소, 서부지역 흥 양리 일대 계곡에서 2개소를 조사하였다. 연구기간은 3월 중 5일간 실시하였으며 조사 시간대는 오전 9시에서 오후 17시 사이에 진행하였다. 현장조사는 계곡부를 따라 걸으며 계곡 본류 인근의 물웅덩이와 본류의 물이 고여 있는 곳을 살펴본 후 계곡산개구리가 산란을 한 곳을 조사하였다. 계곡산개구리 알덩이의 동정은 알덩이가 바닥이나 주변 나뭇가지 등에 강하게 붙어 있으면서 알덩이 도 점성이 매우 높은 상태에 있으면 계곡산개구리 알로 판 단하였다. 이외에 알덩이가 물에 떠 있거나 점성이 약하면 연구대상에서 제외하였다. 계곡산개구리 산란지 조사는 기 본적으로 알덩이수를 조사하였고 산란지의 유형을 독립웅 덩이형, 본류형, 폭포형으로 구분하였다. 산란지 규모는 장 축과 단축의 길이(㎝)를 측정한 후 타원체 면적산출 방법을 이용해 서식지 면적(㎡)을 산출하였다. 또한 산란지 주변부 암반 높이(㎝), 산란지점 수심(㎝), 바닥 유형, 산란지 수온 (℃), 본류 수온(℃), 상부식생 유형, 상부식생 울폐도(%)를 조사하였다. 산란지의 음환경 특성을 파악하기 위해 산란지 점 내부와 산란지점 외부의 소리를 녹음한 뒤 Adobe audition 프로그램을 이용하여 음량(decibel)을 비교분석하였다. 통계분석은 Microsoft Excel 2010과 IBM SPSS Statisics(version 21)프로그램을 이용하였다. 계곡산개구리 산란지의 알덩이수는 최소 1개, 최대 55개, 평균 12개이었다. 산란지 유형은 총 46개 조사구 중 독립웅 덩이형 39개소, 본류형 8개소, 폭포형 1개소이었다. 산란지 면적은 최소 0.1㎡, 최대 45.5㎡, 평균 4.6㎡이었다. 산란지 점의 수심은 최소 1.0㎝, 최대 53.0㎝, 평균 10.9㎝이었다. 산란지 바닥 유형은 낙엽(100%) 유형이 15개소, 낙엽+암반 유형 21개, 낙엽+모래 유형 1개소, 낙엽+암반+모래 유형 8개소, 낙엽+암반+흙 유형 1개소이었다. 서식처 경계부 암 반 높이는 본류와 통합되어 있는 경우 최소 0cm로 하였고, 최대 260㎝, 평균 37㎝이었다. 수온은 산란지가 최소 5℃, 최대 20.9℃, 평균 9.7℃이었고, 산란지와 인접한 계곡 본류 수온은 최소 6℃, 최대 10℃, 평균 6.9℃이었다. 상부식생 유형은 낙엽활엽수는 물푸레나무, 단풍나무류, 버드나무류, 신나무, 참나무류 등이었고, 침엽수는 소나무이었다. 상부 식생 울폐도는 최소 10%, 최대 90%, 평균 56.05%이었다. 산란지 음환경은 산란지 내 음량이 최소 -65.30dB, 최대 -16.38dB, 평균 -44.9dB이었고 산란지 외부 음량이 최소 -59.69dB, 최대 -8.22dB, 평균 -38.4dB이었다. 계곡 본류와 산란지와의 수온 평균을 비교한 결과 산란지 의 수온이 평균적으로 2.8℃ 더 높은 것으로 유의성이 인정 되었으며(p < 0.000), 수온과 알덩이수가 양의 상관관계(p < 0.01)를 나타내어 수온이 높을수록 알덩이수가 많아지는 경향을 나타내었다. 계곡 본류와 산란지의 음량 평균을 비 교한 결과 산란지가 본류보다 평균적으로 6.47dB 음량이 적으로 것으로 나타났다(p < 0.000). 이상의 내용을 종합해 보면 계곡산개구리는 계곡의 빠른 유속, 급작스런 유량의 증가, 이른 봄철의 낮은 온도, 시끄러 운 물소리를 극복하기 위하여 계곡 내에서도 번식에 최적화 된 미소서식지를 선택하는 것으로 판단되었다. 세부적으로 살펴보면 산란지 유형의 경우 대부분 독립웅덩이형이었는 데 이는 본류로부터 이격되어 있는 독립웅덩이가 알이 물에 떠내려갈 확률이 낮고, 수온이 본류보다 높아 알의 부화기 간이 단축되기 때문이다. 산란지 내 알덩어리는 물웅덩이의 규모가 크고 수심이 깊은 지역이더라도 수심 약 10㎝ 정도 의 낮은 경계부에 산란을 하였는데 이는 수심이 낮으면 햇 빛에 의해 빠르게 수온이 상승하여 부화에 유리하기 때문으로 판단되었다. 산란지 하부에는 낙엽과 암석들이 깔려있었 는데, 조사 당시 사람이 나타났을 때 계곡산개구리가 재빠 르게 낙엽이나 돌 밑으로 숨는 행태로 보았을 때 번식기간 동안 포식자로부터 효과적으로 피신하기 위해서 은신이 가 능한 웅덩이에 산란하는 것으로 판단되었다. 산란지 경계부 는 대부분 암석에 의해 둘러쌓여 있어 본류의 시끄러운 물 소리를 차단하고 있었는데, 이는 계곡산개구리 수컷이 울음 소리를 통해 암컷에게 구애하는 특성 상 계곡 물소리로부터 자신의 울음소리가 간섭(masking)되는 것을 피하고, 좀 더 효율적으로 암컷에게 자신의 울음소리를 전달할 수 있는 지역을 선택했기 때문으로 판단되었다. 이상의 내용은 향후 계곡산개구리의 서식처 보전을 위한 기초자료를 제공할 수 있으며, 특히 계곡산개구리 번식환경 조성 시 주변환경으로부터의 물소리와 기타 소음을 차단시 켜 줄 수 있는 공간 조성이 필요함을 제시했다는데서 그 의의를 찾을 수 있다.