본 연구는 몽골의 음주문화를 살피고 원대 새롭게 조합된 금속제 음주기의 기형, 문양, 기법 등을 분석하여 원대 음주기의 특징을 고찰한 것이다. 원을 포함한 몽골제국에서 발견된 음주기도 함께 비교하여 기물 간의 유사점과 차이점, 그리고 이들 지역 간의 교류 양상도 탐 색하였다. 몽골이 세운 원대에 사용된 음주기는 이전의 전통을 계승하면서도 그들이 음용한 주류의 특성과 음주 취향, 그리고 몽골제국의 확장에 따른 다양한 민족ㆍ문물ㆍ문화적 요소가 융합 되면서 독특한 양상을 보인다. 원대 신유형의 음주기는 몽골제국에 속한 러시아 남부의 주치 울루스와 중동의 훌레구 울루스에서도 등장하였다. 이는 지역별로 다소 차이를 보이지만 거 리를 초월한 ‘대몽골 울루스’ 라는 하나의 연합체 안에서 음주문화가 공유되었다는 것을 의 미한다. 원대 음주기는 금속기와 도자기로도 두루 제작되어 재질 간의 기형을 공유했을 뿐만 아니라 고려에도 심대한 영향을 끼쳤다.

Organoleptic parameters such as color, odor, and flavor influence consumer perception of drinking water quality. This study aims to evaluate the taste of the selected bottled and tap water samples using an electronic tongue (E-tongue) instead of a sensory test. Bottled and tap water's mineral components are related to the overall preference for water taste. Contrary to the sensory test, the potentiometric E-tongue method presented in this study distinguishes taste by measuring the mineral components in water, and the data obtained can be statistically analyzed. Eleven bottled water products from various brands and one tap water from I city in Korea were evaluated. The E-tongue data were statistically analyzed using multivariate statistical tools such as hierarchical clustering analysis (HCA), principal component analysis (PCA), and partial least squares discriminant analysis (PLS-DA). The results show that the E-tongue method can clearly distinguish taste discrimination in drinking water differing in water quality based on the ion-related water quality parameters. The water quality parameters that affect taste discrimination were found to be total dissolved solids (TDS), sodium (Na+), calcium (Ca2+), magnesium (Mg2+), sulfate (SO4 2-), chloride (Cl-), potassium (K+) and pH. The distance calculation of HCA was used to quantify the differences between 12 different types of drinking water. The proposed E-tongue method is a practical tool to quantitatively evaluate the differences between samples in water quality items related to the ionic components. It can be helpful in quality control of drinking water.

Radiation workers, especially those dealing with Uranium isotopes, can potentially intake Uranium -containing materials through their respiratory and digestive systems. According to the “Regulations on the Measurement and Calculation of Internal Exposure” from Nuclear Safety and Security Commission (NSSC), those who intend to work in or enter the nuclear facilities with a risk of exceeding 2 mSv exposure per year should be examined the internal exposure. However, when it comes to in-vitro bioassay, Uranium intake through drinking water can affect the quantitative analysis. The International Commission on Radiological Protection (ICRP) reported in ICRP Publication 23 (Report on the Task Group on Reference Man) that the reference man excretes Uranium in the urine (0.05-0.5 μg/day) and feces (1.4-1.8 μg/day). Korea Atomic Energy Research Institute (KAERI) set the 90.5 ng/day as the 238U background of workers handing Uranium based on the daily Uranium intake of Koreans. In this research, we examined the possible effects of Uranium in drinking water on internal exposure by analyzing the concentration of Uranium in bottled waters from various water sources sold in the domestic market and a water from the water purifier. The 238U concentration results of analyzing 11 bottled waters and 1 purified water, were ranged from 0 to 10.2 μg/L. All the results were satisfied the standard of 30 μg/L according to “Regulations for Drinking Water Quality Standards and Inspection” enacted by the Ministry of Environment. However, various concentrations were shown depending on the water sources. Assuming that these concentrations of water are consumed by drinking 1 L per day, the internal dose assessment result is 0 to 0.94 mSv. On the other hand, if it is assumed to be inhaled, it can be an overestimated because the dose coefficient of inhalation, Type M is higher than that of ingestion, f1=0.02 which are the values recommended by ICRP Publication 78 (Individual Monitoring for Internal Exposure of Workers) when the Uranium compound is unspecified. In case of two workers at KAERI, the daily excretion of urine was 151 and 120 ng/day respectively in the first quarter monitoring. However after changing the kind of drinking water in the second quarter monitoring, it dropped to 17.4 and 15.4 ng/day respectively. Through this study, it is confirmed that the Uranium background in urine can be analyzed differently depending on the kind of drinking water consumed by each worker. Depending on the Uranium concentration of drinking water, the internal exposure dose assessment can be overestimated or underestimated. Therefore, the Uranium concentration and intake amount according to the kind of drinking water should be considered for in-vitro bioassays of Uranium handlers. Furthermore, if necessary, the Uranium isotope ratio analysis in urine and the handling information should be comprehensively considered. In addition, in order to exclude the effect of intake through the digestive system, replacing the kind of drinking water can be considered. The additional analysis such as in-vivo bioassay and 24 hours urine analysis rather than spot samples can be also recommended.

This study presents distribution of naturally occurring radioactive materials in groundwater in Jeju island. Radon (222Rn) and potassium (40K) concentrations were performed by using Liquid Scintillation Counter and Ion Chromatograph respectively. In addition, the activities of uranium and thorium nuclides were analyzed by Inductively Coupled Plasma Mass Spectroscopy. Groundwater samples were collected from 9 sites of water intake facilities for wide area supply in Jeju island from September 2022 to September 2023. The 40K concentrations of groundwater ranged between 0.050 and 0.400 Bq·L-1. The radon concentrations in groundwater were in the range of 0 to 60 Bq L-1, and there was no groundwater exceeding the range of 148 Bq L-1 proposed by the US EPA. The distribution of uranium and thorium in groundwater varied from 0 to 500 ng L-1 and 0 to 2.4 ng L-1, respectively. The concentrations of uranium did not exceed 30 μg L-1, thresholds indicated by the US EPA. By analyzing the concentrations of 40K, 222Rn, 238U and 232Th, the annual effective dose of residents can be assessed. The evaluated residents’ effective dose from natural radionuclides due to intake of drinking water is less than the recommended value of 100 μSv y-1. Consequently, this study indicates that the cancer risks of the residents in Jeju island from naturally occurring radioactive materials ingested with water is insignificant.

This study investigated ethopabate (EPB) residues in edible tissues of broiler chickens given in drinking water and established the withdrawal time (WT) of EPB in poultry tissues. Twenty-four healthy Ross broiler chickens were orally administered with EPB at the concentration of 3.8 mg/L for 14 days (EPB-1, n=24) and 15.2 mg/L for 7 days (EPB-2, n=24) through drinking water, respectively. After the drug treatment, tissue samples were collected from six broiler chickens at 0, 1, 3, and 5 days, respectively. EPB residue concentrations in poultry tissues were determined using LC-MS/MS. Correlation coefficient values ranged from 0.9980 to 0.9998, and the limits of detection and quantification (LOQ) were 0.03~0.09 and 0.1~0.3 μg/kg, respectively. Mean recoveries in muscle, liver, kidney and skin/fat tissues were 95.9~109.8, 108.7~115.3, 89.9~96.6 and 86.7~96.8%, respectively, and coefficient of variations were less than 17.11%. At the end of the drug-administration period (0 day), EPB was detected at levels under the LOQ in all tissues from both the EPB-1 and EPB-2 groups. According to the results of EPB residue in Ross broiler tissues, withdrawal periods of both EPB-1 and EPB-2 in poultry tissues were established to 0 day. In conclusion, the developed analytical method is suitable for the detection of EPB in poultry tissues, and the estimated WT of EPB in poultry tissues will contribute to ensuring the safety of Ross broiler chickens.

이 연구는 음주라는 고전적인 청소년의 일탈과 범죄의 주요한 영향요인을 보호관찰 대상 청소년일 경우, 보호관찰 위반 행위에 미치는 요인인지를 실증연구를 통하여 검 증하고, 소년 보호관찰대상자들을 관리･감독을 하는데 있어 강화 요인으로 보고자 하 였다. 이를 위해 한국형사정책연구원의 ‘소년원생의 안정적 사회정착을 위한 실태조사 및 정책지원 방안 연구’의 2차 데이터자료를 활용하였으며, 통계분석프로그램을 활용 하여, 최종적으로 로지스틱회귀분석을 실시하였다. 연구결과, 소년원 출소 후 보호관 찰 대상 청소년의 음주 문제행동이 보호관찰 기간 동안의 경고 또는 위반 행위 등의 경험에 유의미한 영향을 미치는 것으로 나타났으며, 남자 청소년보다 여자 청소년이 보호관찰 기간 동안 준수사항 위반 수준이 더 높은 것으로 나타났다. 이를 근거로 하 여, 보호관찰 소년대상들의 음주 위험 수준에 대한 교육 및 지도 강화를 통해 비행, 문제 행동 및 범죄를 예방하는 정책적 방안에 근거자료로 활용하기를 기대한다.

Drinking spaces such as bars, taverns, inns, cantinas, bierkellers, offer important social community spaces. Within the UK, a Pub, short for Public House is “a place, especially in Great Britain or Ireland, where alcoholic drinks can be bought and drunk and where food is often available” (Cambridge Dictionary, 2022) and is one of the most common and traditional drinking spaces. Sadly we are losing pubs at an alarming rate, due, over the last 20 years to many factors including government interventions (changes in the structure of the industry), increased competition from other leisure activities and high levels of beer duty/tax (BBPA, 2018) and more recent factors such as struggles to fill vacancies, Brexit and covid (Wells and Waehning, 2022). Now, more than ever, we need to understand consumer behaviour related to pubs and to understand how consumers choose pubs and what features of pubs are important to them.

From 2020, Korean Animal and Plant Quarantine Agency has reset the withdrawal time (WT) for veterinary drugs typically used in livestock in preparation for the introduction of positive list system (PLS) program in 2024. This study was conducted to reset the MRL for amprolium (APL) in broiler chickens as a part of PLS program introduction. Forty-eight healthy Ross broiler chickens were orally administered with APL at the concentration of 60 mg/L (APL-1, n=24) for 14 days and 240 mg/L (APL-2, n=24) for 7 days through drinking water, respectively. After the drug treatment, tissue samples were collected from six broiler chickens at 0, 1, 3 and 5 days, respectively. Residual APL concentrations in poultry tissues were determined using LC-MS/MS. Correlation coefficient (0.99 >), the limits quantification (LOQ, 0.3~5.0 μg/kg), recoveries (81.5~112.4%), and coefficient of variations (<15.5%) were satisfied the validation criteria of Korean Ministry of Food and Drug Safety. In APL-1, APL in all tissues except for kidney was detected less than LOQ at 3 days after drug treatment. In APL-2, APL in liver and kidney was detected more than LOQ at 5 days after treatment. According to the European Medicines Agency’s guideline on determination of withdrawal periods, withdrawal periods of APL-1 and APL-2 in poultry tissues were established to 3 and 2 days, respectively. In conclusion, the developed analytical method is sensitive and reliable for detecting APL in poultry tissues. The estimated WT of APL in poultry tissues is longer than the current WT recommendation of 2 days for APL in broiler chickens.

Tritium is a radioactive isotope of hydrogen with a half-life of about 12.3 years, and it is commonly found in the environment as a result of the production of Nuclear Power Plants. The World Health Organization (WHO) has established guidelines for the permissible levels of tritium in drinking water. The guideline value for tritium in drinking water is 10,000 Bq/L. It is important to note that the guideline value for tritium is not a legal limit, but rather a recommendation. National and local authorities may establish legal limits that are more restrictive than the WHO guideline value based on local conditions and risk assessments. The Australia and Finland have set a limit for tritium in drinking water at 76,103 Bq/L and 30,000 Bq/L respectively, which is more than three to seven times higher compare to guideline value of WHO. The United States Environmental Protection Agency (EPA) has set a maximum contaminant level (MCL) for tritium in drinking water at 20,000 picocuries per liter (pCi/L), which is equivalent to 740 Bq/L. The Health Canada has set a guideline value for tritium in drinking water at 7,000 Bq/L. Assuming drinking water corresponding to each tritium limit (or guideline value) for one year, the expected exposure dose is 0.01 mSv to 1 mSv. It means that the tritium in drinking water below the limits or guideline value does not pose a significant risk to human health.

The emergence of micropollutants in natural water sources due to the overuse of anthropogenic chemicals in industry and households has threatened the production of clean and safe tap water in drinking water treatment plants. Conventional physicochemical processes such as coagulation/flocculation followed by sand filtration are not effective for the control of micropollutants, whereas chemical oxidation processes (applying chlorine, permanganate, ozone, etc.) are known to be promising alternatives. Determining the optimum oxidant dose is important issue related to the production of disinfection by-products as well as unnecessary operating cost, and is made possible by simulations of target-micropollutant abatement based on kinetic model equation consisting of second-order rate constant (between the oxidant and the target) and oxidant exposure. However, the difficulty in determining oxidant exposure as a function of complex water quality parameters limits the field application of kinetic model equation. With respect to representative oxidants used in drinking water treatment plants, this article reviews two main approaches for determining oxidant exposure: i) direct measurement in situ and ii) prediction by empirical models based on key water quality parameters. In addition, we discussed research requirements to improve the predictive accuracy of the empirical models for oxidant exposure and to develop a rational algorithm to determine optimal oxidant dose by considering the priority of the target pollutants to be treated.

국내 Y정수처리시설에 20-40 m3/m2/h의 표면부하율을 갖는 고속 용존공기부상공정을 도입하였다. 우선, 용존공기부상공정과 입상활성탄 공정이 결합된 반응기를 일처리용량 500 m3/day의 조건으로 운전하였다. 운전결과는 두 공정이 원수내 탁도, 조류, 지오스민, 2-MIB를 감소시킬 수 있음을 증명하였다. 도출된 최적 설계요소를 활용하여 현장규모의 공정(5,000 m3/day)에 용존공기부상공정을 도입하였다. 여름철 56일간 조류와 탁도 제거율을 평가하였다. 처리수 내 조류의 개체수는 20-30 cells/mL 이하로 유지되었으며, 조류 제거효율은 80-89%를 기록하였다. 침전법 및 용존공기부상공정 처리수질의 탁도 제거효율을 비교한 결과 평균 탁도 제거효율은 77%를 나타냈다. 이러한 결과들은 고속 용존공기부상공정이 여름철 음용수의 탁도 및 조류와 같은 저밀도 고형물을 제거하는데 유의미한 방법임을 나타냈으며, GAC는 맛･냄새를 유발하는 화합물(지오스민, 2-MIB)를 제거할 수 있는 공정 옵션인 것을 확인하였다.

본 논고는 일본 헤이안 시대 말에서 가마쿠라 시대 초기 중국에서 전래된 차의 수용 양상 을 천태대사공(天台大師供), 계어독경(季御讀經), 북두법, 나한신앙과 나한공을 중심으로 분석하여, 당시 궁정과 사원 의례 및 승원에서 사용된 차의 구체상에 대해 살펴본다. 특히, 입송(入宋) 일본 승려들의 일기류 문헌, 선원청규(禪苑淸規)를 포함한 송대 사원의 각종 규칙서, 당시 남송 승원의 모습을 담고 있는 것으로 생각되는 나한도에 표현된 끽다 관련 양 상을 함께 분석하여, 일송(日宋) 교류의 배경 속에서 입송 일본 승려들이 중국에서 경험한 사원 의례와 승원 문화 속 차의 모습이 어떤 것이었는지, 이것이 어떻게 일본에서 수용되었 는지 그 구체적 일면을 고찰한다. 의례적인 관점을 통해 단순한 기호 음료가 아닌 갖추어야 할 공양물로서의 차 그리고 영적인 효능이 기대되던 차의 구체적 사용양상을 이해할 수 있으 며, 중국 송대 사원의 의례와 규율이 일본에 전래된 정황을 파악할 수 있다.

Most of the drinking water dams managed by the local governments in Korea are earthfill dams, and these dams have almost no geotechnical property information necessary for seismic performance evaluation. Nevertheless, in the rough planning stage for improving seismic safety for these dams, it is necessary to classify their relative seismic hazard against earthquakes and conduct an additional ground investigation. The zero seismic failure probability curve is a curve suggested in this study in which the probability of failure due to an earthquake becomes ‘0’ regardless of the geotechnical properties of the earthfill dam. By examining the method and procedure for calculating failure probability due to an earthquake suggested in previous researches, the zero seismic failure probability curves for an earthquake in 1,000-year and 2,400-year return periods in Korea were presented in the form of a hyperbola on the plane of the dam height versus freeboard ratio (ratio of freeboard to dam height), respectively. The distribution characteristics of the dam height and the freeboard ratio of 81 Korean earthfill dams were presented. The two proposed zero seismic failure probability curves are shown on the plane of the dam height versus freeboard ratio, and the relative seismic hazard of 81 dams can be classified into three groups using these curves as boundaries. This study presented the method of classifying the relative seismic hazard and the classification result.

｢다주론｣은 20세기 초 돈황 장경동에서 발견된 통속서사 작품 중 하나이 다. 의인화된 차와 술의 논쟁으로 구성된 이 소품은 두 사물이 자신의 의견을 주장하는 독특한 형식, 해학적인 언어와 함께 당시 유행한 공연 형식과의 직접적 연관성 측면에서 주목할 만하다. 뿐만 아니라 이 작품은 음용 문화를 대표하는 차와 술에 대한 당시의 인식을 현실적으로 보여준 다는 점에서 문화사적으로도 연구의 가치가 있다. 돈황 사본은 천여 년 전의 원본으로서 2차 텍스트 자료만으로는 파악하 기 힘든 정보까지 제공해준다. 모든 자료가 유일본이라고 할 수 있는 필 사본은 하나하나가 독립된 자료로서 문헌학적 정보를 담고 있다. 이에 본 논문은 작품의 내용이나 사본의 성격에 대한 분석과 더불어 ｢다주론｣ 사 본의 문헌적 특징까지 살펴보고자 했다. 그리고 논문의 주요 내용으로 음 용 문화와 공연의 관점에서 당시 차와 술에 대한 인식과 ｢다주론｣ 작품 의 공연 방식에 대해 고찰하였다. 이 과정에서 ｢다주론｣에서 차와 술은 대등하게 논쟁을 진행하기보다는 차가 논의를 주도하다가 결국은 일방적 으로 차가 술을 비판하는 단계에 이르고, 이는 곧 당시 통속서사 작품에 가미된 불교적 색채와 관련이 있음을 주장하였다. 그리고 마지막으로는 자료의 문헌학적 특징에 근거하여 독서용 사본으로서의 현존 ｢다주론｣에 대해 분석하였다.

210Po is a naturally occurring radionuclide of 238U decay series with a half-life of 138.4 days. 210Po is decay products of 222Rn, which escapes into the atmosphere and present in all environments with aerosol particles. Also, 210Po has high radiotoxicity and emits a high alpha energy of 5.305 MeV, and it decays to finally become a stable isotope, 206Pb. Therefore, 210Po entering the body by continuously ingestion or inhalation is likely to cause severe damage to the bone marrow, kidney and spleen and other sites in the body. Accordingly, the World Health Organization (WHO) recommends that screening level of gross alpha for drinking water not exceed 0.5 Bq·L−1. Alpha spectrometry has been mainly used for analysis of 210Po, and for the accurate measurement of alpha particle with short range, it is essential to prepare suitable source for alpha detection. The 210Po alpha source is made by a spontaneous deposition method in which polonium is adsorbed thin and flat onto a metal disc, such as silver, nickel and copper. There are various pretreatment methods to separate and concentrate polonium from water samples prior to spontaneous deposition, including Fe(OH)3 or MnO2 co-precipitation and evaporation. However, in the case of co-precipitation, sample contamination or loss of polonium may occur through the experimental processes, and evaporation lead to not only time-consuming process but also may cause loss of polonium due to the low boiling point of polonium. Therefore, in order to compensate for these problems, an efficient polonium analysis method that directly collects polonium from the original sample without a pretreatment is required. In this study, 210Po in bottled drinking water sold in Korea was analyzed using alpha spectrometry. A high purity silver disc (99.99%) was inserted into a newly designed polonium deposition kit to quickly and conveniently collect polonium from a water sample. The polonium alpha detecting source was made effectively only by the spontaneous deposition method without a complicated pretreatment. The source was measured using a PIPS detector, and the radioactivity concentration of 210Po was calculated using 209Po as a yield tracer.

Water treatment process simulator is the tool for predicting sequential changes of water quality in a train of unit processes. This predicts the changes through governing equations that represent physicochemical performance of each unit processes with an initial and boundary conditions. Since there is no operational data for the design of a water treatment facility, there is no choice but to predict the performance of the facility by assuming initial and boundary conditions in virtual reality. Therefore, a simulator that can be applied in the design stage of a water treatment facility has no choice but to be built as a numerical analysis model of a deductive technique. In this study, we had conducted basic research on governing equations, inter-process data-flow, and simulator algorithms for the development of simulators. Lastly, this study will contribute to design engineering tool development research in the future by establishing the water treatment theory so that it can be programmed in a virtual world and suggesting a method for digital transformation of the water treatment process.

Microplastics have become a rising issue in due to its detection in oceans, rivers, and tap water. Although a large number of studies have been conducted on the detection and quantification in various water bodies, the number of research conducted on the removal and treatment of microplastics are still comparatively low. In the current research, the inflow and removal of microplastics were investigated for various drinking water treatment plants around the world. Addition to the investigation of filed research, a survey was also conducted on the current research trend on microplastic removal for different treatment processes in the drinking water treatment plants. This includes the researches conducted on coagulation/flocculation, sedimentation, dissolved air flotation, sand filtration and disinfection processes. The survey indicated mechanisms of microplastic removal in each process followed by the removal characteristics under various conditions. Limitations of current researches were also mentioned, regarding the gap between the laboratory experimental conditions and field conditions of drinking water treatment plants. We hope that the current review will aid in the understanding of current research needs in the field of microplastic removal in drinking water treatment.