This study aims to configure what dimensions make up for smart phone after service quality, and how this service quality affects customer satisfaction and customer loyalty. Smart phone market is a market of the device leading the digital convergence as well as positioning itself as one of the national growth driving industry. To survive in this matured market, companies should have to respond actively to radical changes and customers needs in the so-called Smart Revolution environment. Lately, however, the smart phone market is prospected to move from growth phase to mature phase by the scholars. In order to proactively respond to the change in such market condition, companies need to provide absolute advantage in customer loyalty over their competitors by revolutionizing the after-sales service quality. Qualified A/S will lead to service satisfaction and achieve customer loyalty. The empirical analysis results obtained through A/S quality are as follows : First, human quality (attitude, expertise, problem-solvability), environment quality (handling agility, convenience, comfort), service policy quality (quality guarantee, additional service operation) are dimensions that make up for A/S quality. Second, A/S quality dimension showed a significant positive influence on service satisfaction and A/S satisfaction showed a positive influence on customer loyalty as well. Based on this empirical study, we propose some implications for A/S quality improvement. First, human quality dimension has relatively higher influence on A/S satisfaction in case of free A/S, so companies need to solve the product problem completely when consumer’s first visit by continual employee education. Second, in case of paid A/S, the service policy quality-especially A/S Warranty period- has higher influence on A/S satisfaction.

PURPOSES : This research was a laboratory study for evaluating the Reclaimed Asphalt Pavement (RAP) mixture added developed rejuvenator for warm mix recycling. Waste asphalt mixtures occupy about 18.2% of construction wastes in Korea. Moreover, most rejuvenators were imported from Europe or the U.S. Therefore, improving usage of RAP with a developed rejuvenator material provides environmental protection at a reduced cost. METHODS : The specimen used for this experiment was performed by only using RAP. A suitable rejuvenator for Target PG was then added. In addition, a conventional rejuvenator was selected to compare performance and specimens introduced with the same procedure as the developed rejuvenator was prepared. In order to evaluate rutting resistance and water susceptibility, we conducted a deformation strength test, a tensile strength ratio test, and a dynamic immersion test with the prepared mixtures. RESULTS: Laboratory test results indicated that both the developed additive and conventional additive improved performance of the recycled asphalt mixtures compared to mixtures without the rejuvenator. In addition, the deformation strength test and TSR test results satisfied standards for domestic recycling asphalt mixtures. The dynamic immersion test showed that the developed rejuvenator has superior scaling resistance than the conventional rejuvenator. CONCLUSIONS : In terms of rutting resistance and moisture susceptibility, the warm mix recycled asphalt mixtures with the developed rejuvenator appeared to effectively recovered performance.

서 론 빠른 경제성장과 함께 <2016년 국토교통부> 자동차 등록대수는 2180만을 돌파하였다. 이처럼 많은 차량들이 도로를 사용하게 됨에 따라 기존의 아스팔트도로와 콘크리트도로가 많이 노후와 되어있는 추세이며, 이에 도로의 유지.보수 관리의 중요성이 높아지게 되었으며, 유지.보수간에 가장 많이 사용되는 공법 중에 하나인 덧씌우기 공법에 사용하는 택코트의 성능을 검토하기 위해 수행되었다. 실험 방법 및 사용재료 2.1 사용재료 실험에 사용된 택코트는 일반적으로 사용되어지는 RSC-4와 택코트 필름을 사용하였으며, 부착강도를 측정하기 위해 양생시간을 동일하게 하여 Pull of test를 통해 부착강도를 측정하였다. 2.2 실험 방법 휨몰드와 마샬 몰드를 사용하여 각각 택코트 RSC-4와 필름을 사용하여 공시체를 제작하였다. 1층 다짐 후 24시간 양생 후 2차 다짐을 한 후에 48시간 부착강도를 측정하였다. 그림1은 본 실험에 사용된 시편의 제작과정이며, 그림2는 부착강도 테스트 후의 모습이다. 결과 및 고찰 3.1 동일한 양생조건에서 콘크리트 위에 부착한 택코트 종류에 따른 부착강도 그림4은 휠트래킹 몰드로 만든 콘크리트에 부착한 택코트 종류에 따른 부착강도를 나타낸 그래프이다. 3.2 동일한 양생조건에서 아스팔트 위에 부착한 택코트 종류에 따른 부착강도 그림 5는 마샬 몰드로 만든 아스팔트 공시체 위에 부착한 택코트 종류에 따른 부착강도를 나타낸 그래프이다. RSC-4의 경우에는 살포 후 30분간 상온양생을 실시하였다 결 론 일반적으로 사용되어지고 있는 택코트 인 RSC-4의 경우 유화아스팔트라는 성질 때문에 충분한 양생이 필요하여 공기가 늘어나게 되어 실제 현장에서 규정에 맞게 사용하기가 힘든 실정이다. 도로 유지.관리 공법중 하나인 덧씌우기 공법에 사용되는 택코트의 종류와 부착하는 재료에 따른 부착 강도평가 실험결과는 다음과 같다. 1) 콘크리트 위에 각각 RSC-4와 택코트 필름을 부착하여 Pull-off-test 장비를 이용하여 부착강도를 평가한 결과 각각 0.77, 0.76 으로 비슷한 결과를 나타냈다. 2) 아스팔트에 부착한 RSC-4와 택코트 필름을 부착하여 부착강도를 평가했을때와 비슷한 경향을 나타냈다. 각각 1.241, 1.304로 택코트 필름과 보호필름을 사용한 쪽이 더 높게 나타났다. 이는 공사기간을 단축시킬 수 있을 뿐만 아니라 트래피커빌리티를 고려하였을 때 택코트 필름과 보호 필름을 사용하여 더 효율적으로 유지.보수를 할 수 있을 것으로 판단된다

One of the most innovative approaches for maintaining and rehabilitating the Seoul pavement is to develop and implement the maintenance of pavement under the pavement management system (PMS). This paper documents result of the survey on PMS used in Seoul. This model is uses the theory to survey the condition of the pavement ,An index called the Distress Manifesto Index (DMI) is define as used to measure the pavement distress condition of the Seoul pavement. And there is Riding Condition Index (RCI) is to define the comfort of driver who is traveling on the Seoul pavement. Pavement condition index is defined as used to evaluate pavement condition. The cost effective PMS is possible only when maintenance requirement are identified at right time with realistic prediction of overall pavement condition. For Seoul, several survey are used in order to management decisions such as Pavement Serviceability Index (PSI), Surface Condition Ratting (SCR), and Pavement Condition Rating (PCR) etc. the goal of this paper is to evaluate the condition of pavement to facilitate a better understanding of the opportunities to augment the current framework while remaining consistent with the aims of moving ahead for progress in 21stcentury. This research is based on the performance of the asphalt concrete pavement data of Seoul Pavement. Pavement are divided into three classes Class 1 consist of 10-7 SPI result data ,that the pavement is in good condition. Class 2 consist of 6.99-4.0 SPI result data , that the pavement is in average condition. Class 3 consist of 3.99-0.00 PCI result data, that the pavement is in bad condition and need to repair immediately. the performance data is from Dongsomoonlo(28) it consist of Rutting ,Cracking, and IRI data.

국내 도로포장의 약 80%의 비중을 차지하는 아스팔트 포장은 신속한 교통개방 및 유지관리의 편의성 등의 장점이 있는 반면, 소성변형(permanent deformation rutting), 환경영향에 의한 균열(crack), 시공과정에서 발생되는 이음(joint)에 의한 이음부 균열(joint crack) 등의 단점도 많이 내재되어 있는 실정이다. 그동안 아스팔트 개질재 개발 및 골재 입도 개선 등을 통하여 소성변형 저감을 위한 연구는 지속적으로 이루어져 온 반면, 균열에 대한 연구는 상대적으로 미비한 것이 국내 실정이다. 최근 국내도로는 교통량의 증가와 주변 환경의 따라 도로의 포장공사가 증가하고 있는 추세이나, 아스팔트 포장의 확장공사, 절삭 덧씌우기 공법을 적용한 보수공법 시공시에는 굴착 복구 과정에서 기존 포장과 이어서 새롭게 포설 및 다짐한 포장사이에 시공조인트(cold joint)가 발생하게 된다. 이런 시공조인트는 이미 포장된 면과 새로 포장된 면과의 접착이 이루어지는 접합부로 단기간 내에 신구포장의 접착부실로 조기균열이 발생하여 강우시 균열부위에 빗물이 침투하게 되고, 차량의 하중에 의해 점진적으로 균열이 확대되어 라벨링, 박리 및 포트홀 발생으로 연결되게 되어 포장층의 내구성 및 수명 저하를 초래한다. 따라서 아스팔트 포장 시 발생되는 시공조인트의 완벽한 접착력 및 방수성과 차량의 하중 및 충격을 흡수하여 시공조인트 균열의 확대를 억제할 수 있는 예방적인 재료가 절실히 요구되고 있다. 예를 들어, 국내의 경우 아스팔트 포장의 종 방향의 시공 이음부 균열 문제를 근본적으로 해결하지 못하고 있는 실정이며, 아스콘 포장 후 1～2년 경과 후에 이음부에서 균열이 발생되며, 이러한 시공균열 발생저감을 위하여 국내 R사에서 새로 개발한 고무화 아스팔트계 자착식 시트를 사용하여 균열 저항성과, 저온 유연성에 대한 실험 및 평가를 하였다.

In this study, a system was developed that can evaluate the radon gas removal efficiency of air cleaner filters. The system has three acrylic chambers connected in series;: the 1st chamber, the filter chamber and the 2nd chamber. In the 1st chamber, a radon source and an air pump were installed to create an environment with a constant radon concentration. Radon concentration in the two chambers was continuously monitored by ionization chamber detectors(RD-200, FRD1600, FTLab, Korea) and, in the 2nd chamber, the radon concentration increase of air filtrated by each filter was inter-compared. HEPA filters and two honeycomb type filters were evaluated. Results of HEPA filter, GAC 1 and GAC 2 were 1142 Bq, 7016 Bq and 12053 Bq, respectively. HEPA filter showed a significantly lower capacity for radon removal than the GAC filters. Also, the GAC 2 filter showed a more than 70 % better result compared to GAC 1 due to the difference in filter materials. Therefore, this system can be used to evaluate the radon removal ability of air cleaner filters, by filter type and filter material.

PURPOSES:The purpose of this paper is to evaluate interface performance while using various tack coat materials for asphalt overlay.METHODS:The evaluation was conducted with tracking test, permeability, and interface bond strength. Tracking test was conducted using an image processing technique, to investigate the susceptibility of the tack coat materials. BBS and pull-off test were conducted to evaluate bond strength. The permeability test was conducted to evaluate the effect of tack coat materials.RESULTS :Results reveal that the trackless tack coat material demonstrates less tracking compared to other materials. Moreover, both BBS and pull-off tests can effectively evaluate the bond strength at the interface. RSC-4 was measured less bond strength. Moreover, tack coat prevents water penetration through the surface and aids the extension of the surface life of asphalt pavement.CONCLUSIONS :Trackless tack coat demonstrated a high and consistent bond strength performance. The tack coat types demonstrate marginally different performance as function of curing times. Field applicability was tested based on visual observation. Therefore, these should be considered when trackless tack coat is slightly enhanced the pavement performance based on limited this study results. Finally, it is necessary to allow reasonable time for the tack coat to completely cure.

PURPOSES :This study aims to develop a sealant for use in the installation of Weigh-In-Motion (WIM) sensor for asphalt concrete or cement concrete pavements.METHODS:In order to investigate the properties of various sealants that were mixed with latex and carbon fiber, various test methods were adopted, such as bituminous bond strength test, softening point test, and cone penetration test. To evaluate moisture susceptibility, the BBS test was conducted under moist condition. The bond strength ratio (BSR) was calculated based on tensile strength ratio method.RESULTS :The sealant’s properties significantly varied according to the amount of latex or carbon fiber. The usage of latex marginally enhanced the cone penetration test result, notwithstanding reduced asphalt content. This implies that the sealant will be proper cold temperature reason. Moreover, the addition of latex and carbon fiber evidently increased the softening point. This indicates that the tendency of the material to flow at elevated temperatures is encountered during service. With the addition of latex and carbon fiber, the moisture susceptibility measured with BSR improved marginally, while the bond strength under dry condition decreased marginally. Sealant F displays the highest bond strength and BSR under limited test conditions.CONCLUSIONS :According to the proportion of latex and carbon fiber mixed, properties of sealant, such as softening point, cone penetration, and BSR varied marginally. This indicates that the sealant has to be applied considering the environmental condition, to improve service life.

PURPOSES : This research was a fundamental study on the application of an integral TiO2 solution to asphalt concrete pavement. The integral TiO2 solution was produced in pilot production equipment; application of the integral TiO2 solution to asphalt pavement was conducted to examine the pollution-reducing capability of photocatalytic compounds such as TiO2. The photocatalytic TiO2 reacted with air pollutants, converting them into small amounts of relatively benign molecules. METHODS : In this study, laboratory experiments were conducted using five various testing methods. Tensile strength ratio (TSR) and British pendulum test (BPT) were conducted in order to evaluate the properties of asphalt pavement subsequent to the integral TiO2 solution coating. In addition, methylene blue testing, a measurement of nitrate on the coated pavement, and nitrogen oxide (NOx) reduction testing were conducted in order to evaluate photocatalytic reaction. Lastly, a UV-A lamp was used as a light source for photocatalytic reactions. RESULTS : Test results indicated no change in the properties of asphalt pavement following the integral TiO2 solution coating. In order to evaluate the performance of asphalt pavement as a function of TiO2, the moisture susceptibility and skid resistance were investigated. The moisture susceptibility and skid resistance satisfied there quirements related to pavement quality and safety specification. Furthermore, the effects of reduction of air pollution were significantly improved as determined via the methylene blue test and NOx reduction test. The TiO2-paved asphalt specimen exhibited approximately 43% reduction of NOx. CONCLUSIONS : This study has suggested that applying TiO2 rarely impacts asphalt pavement performance measures such as moisture susceptibility and skid resistance, and that its application may be a better means of reducing air pollution. Further studies, such as proper TiO2 dosage rates and compatibility with various pavement types, are required to broaden and generalize its application.

인상학은 몸의 물질적 표면에서 내면의 정신성을 파악하려는 지식 구성물이다. 얼굴 이미지로 부터 성격유형론을 추론하려는 인상학 담론은 근대 신경과학에 의해 물질성 담론으로 번역된다. 이 과정에서 측정과 기록을 위한 의학 기계와 미디어 기계의 기입 방식이 자각된다. 벨라 발라즈와 발 터 벤야민은 기계에 의한 사물세계의 인상학적 구성을 해명한다. 사물의 인상학에서 기계의 작동은 하나의 표현으로 옮겨진다. 이러한 현상은 인간, 사물, 기계가 혼종된 미학의 가능성을 보여준다.

Mobile phone market, a market of the device leading the digital convergence as well as positioning itself as one of the national growth driving industry and as a daily necessity, is led globally by companies that have been actively responding to changes in the so-called Smart Revolution environment. Lately, however, the Smart Phone market is prospected to move from growth phase to mature phase by the scholars. In order for a company to proactively respond to the change in such market condition, it is imperative that they ensure absolute advantage in customer loyalty over their competitors by revolutionising the after-sales service(A/S) quality that will lead to service satisfaction. This study aims to configure what dimensions make up for mobile phone A/S quality, and how this quality affects customer satisfaction and loyalty as well as proposing directions for A/S quality improvement by identifying them case by case to see what dimensions have more impact on customer satisfaction.

PURPOSES: The new waste management policy of South Korea encourages the recycling of waste materials. One material being recycled currently is tire-derived fuel (TDF) ash. TDF is composed of shredded scrap tires and is used as fuel in power plants and industrials plants, resulting in TDF ash, which has a chemical composition similar to that of the fly ash produced from coal. The purpose of this study was to evaluate the properties of an asphalt concrete mix that used TDF ash as the mineral filler. METHODS: The properties of the asphalt concrete were evaluated for different mineral filler types and contents using various measurement techniques. The fundamental physical properties of the asphalt concrete specimens such as their gradation and antistripping characteristics were measured in accordance with the KS F 3501 standard. The Marshall stability test was performed to measure the maximum load that could be supported by the specimens. The wheel tracking test was used to evaluate the rutting resistance. To investigate the moisture susceptibility of the specimens, dynamic immersion and tensile strength ratio (TSR) measurements were performed. RESULTS : The test results showed that the asphalt concrete containing TDF ash satisfied all the criteria listed in the Guide for Production and Construction of Asphalt Mixtures (Ministry of Land, Infrastructure and Transport, South Korea). In addition, TDF ash exhibited better performance than that of portland cement. The Marshall stability of the asphalt concrete with TDF ash was higher than 7500 N. Further, its dynamic stability was also higher than that listed in the guide. The results of the dynamic water immersion and the TSR showed that TDF ash shows better moisture resistance than does portland cement. CONCLUSIONS : TDF ash can be effectively recycled by being used as a mineral filler in asphalt, as it exhibits desirable physical properties. The optimal TDF ash content in asphalt concrete based on this study was determined to be 5%. In future works, the research team will compare the characteristics of asphalt concrete as function of the mineral filler types.

PURPOSES : This paper aims to develop a road pavement de-icing system using carbon sheet to replace the older snow de-icing method. Carbon sheet is a light and high-strength metal. Hence, various bodies of research for its applications in many industries have progressed. METHODS : The experiment was conducted in a laboratory. The carbon sheet supplied voltage through a power supply system, and produced heat transfers to the concrete surface. Various factors, such as pavement material, carbon sheet width, penetration depth, and freezingthawing resistance, were considered in the conducted experiments to confirm the heating transfer efficiency of the carbon sheet. RESULTS : The carbon sheet used was a conductor. Therefore, it produced heat if voltage was supplied. The exposed carbon sheet on the atmosphere did not affect the carbon sheet width when it provided constant voltage. However, the sheet showed different heating behaviors by width change when the carbon sheet penetrated into the concrete. Moreover, the freezing-thawing resistance was decreased by the carbon sheet with increasing width. CONCLUSIONS : The experiments confirmed the possibility of developing a road snow melting system using a carbon sheet. The antiicing system using the carbon sheet to replace the traditional anti-icing system has disadvantages of environmental pollution risk and electric leakage. The pavement also improved its toughness resistance. The utilization value will be very high in the future if carbon sheet heat loss can be minimized and durability is improved.

국내 대기오염물질 중 도로공간에서 발생하는 오염원은 약 34.4%로 다소 많은 비중을 차지하고 있다. 이러한 대기오염을 정화하는 방법의 한 예로는 TiO2의 광촉매 작용을 이용하여 도로공간에서 발생하는 오염물질 제거방법이 있다. 현재 국내･외의 다양한 분야에서 광촉매를 활용한 연구가 활발히 진행 중이 며, 그 중 토목분야에서는 배기가스에 인한 도로 오염물질 배출을 저감하기 위한 연구가 진행되고 있다. TiO2는 빛을 이용하여 광화학 반응을 촉진시키는 물질로서 활성도가 높고 화학적으로 안정적이며, 인체 에 무해하여 대기정화, 수질정화, 셀프클리닝(self-cleaning), 초 친수성 제품 등 다양한 활용분야에 사 용되고 있다. 하지만 TiO2는 백색 분말로 이루어진 특성이 있어, 바람에 흩어지거나 물에 혼합되면 회수 가 어렵고 손실의 우려가 크다. 이에 대해 광촉매 분말의 고정화가 필요한 동시에 활성에 영향을 주는 비 표면적 확보와 바인더의 내구성 및 무해성이 요구된다. 따라서 본 연구에서는 1액형 광촉매를 도포한 아 스팔트 포장체의 광활성 거동을 파악하기 위한 기초연구를 수행하였으며, 광촉매 시료는 국내 B사의 광 촉매 물질을 수용액 중에서 마이셀화 시키는 음전하성 계면활성제와 무기질 바인더가 혼합된 1액형 TiO2 혼합물을 사용하였다. 본 실험에서는 수용성 미디움에서 표면의 광촉매 활성 시험 – 메틸렌 블루 분해법(KS L ISO 10678)과 노면의 미끄럼저항성 시험방법(KS F 2375)를 진행하였다. 메틸렌 블루 분해법을 통해 아스팔트 시편에 도포된 TiO2의 용량에 따른 광분해율의 변화를 파악 할 수 있었으며, 약 400g/m2 의 적정 도포량을 도출 하였다. 또한 광촉매 수용액이 도포된 아스팔트 표층의 미끄럼 저항성 측정 결과, 광촉매가 도포되지 않 은 시편과 비교하여 미끄럼 저항성이 1~2% 감소하는 것으로 나타났다. 이는 광촉매가 아스팔트 포장체의 미끄럼 저항성에 미치는 영향이 미비하다는 것을 의미한다.

PURPOSES: The objective of this study is to determine the milling temperature that minimizes the binder-induced damage to the aggregate; this is achieved by evaluating the temperature dependence of the viscosity of the asphalt binder, with the aim of developing an effective heating process for warm in-place recycling. METHODS : The validity of the indoor test was confirmed by conducting an internal heating test based on the on-site heating test. In addition, the adhesive power of the binder was measured at various temperatures (30℃, 40℃, 50℃, 60℃, 70℃) via three types of measuring methods. RESULTS: The surface temperature spectrum of field test was slight different with that of laboratory test. But, the spectra of inner temperature between the field and the laboratory was almost similar. Also, the adhesion of the asphalt binder was measured from 30℃ to 70℃. The adhesion of the binder was significantly decreased from 60℃. Contrary to other temperature, the adhesion was slightly changed from 60℃ to 70℃. Also the inner temperature between two different heating methods was shown similar temperature spectra. CONCLUSIONS: The pavement heating temperature spectrum of hot in place recycling method was simulated by a laboratory test. Based on this study, the optimum temperature was 60℃~70℃ for reducing aggregate damage during milling process. The susceptibility heating method developed in this study can be maintained the optimum inner temperature range.