Effects of Mold Growth on Building Materials by Different Environments in Taiwan

An Cheng,Yu Hsin,Wei-Ting Lin 대한토목학회 2014 KSCE Journal of Civil Engineering Vol.18 No.4

The main of study is to investigate the effect of moisture variation and micro-structure on the growth mold at surface of buildingmaterials. The two different water-cement ratio of mortars (w/c = 0.4, 0.6), brick and tiles were used in this study. The mercuryIntrusion Porosity-Meter (MIP) was used to determine the pore distribution of building materials. The moisture variation of materialswas recorded in constant climate chamber (25oC, relative humidity 80%), general indoor environment (28oC, relative humidity 55%)and water damage simulation environment. The results indicated that the pore size and distribution will affect the surface water ratioand moisture content of materials. The surface water ratio of specimen was affected by different environment seriously. The surfacewater ratio was an important factor in mold growth.

Of Imperial Trauma; or, Mohsin Hamid’s Critique of American Empire

Yu‐cheng Lee 21세기영어영문학회 2013 21세기영어영문학회 학술대회 Vol.2013 No.09

A Comparative Study based on QR Code Payment Service between South Korea and China - Focused on Customer Journey Map of Kakao Pay and WeChat Pay -

Cheng,Yu,Kim Jung-Woo,Sul Sang-Hun,Choi Jae Boong 한국IT서비스학회 2019 한국IT서비스학회 학술대회 논문집 Vol.2019 No.2

양지면 전원주택단지 프로젝트 계획

김신원,정유홍,노희곤,도의성,최기왕 경희대학교 디자인연구원 2006 예술· 디자인학연구 Vol.9 No.2

This plan of rural housing-development is to present a new orientation for the residential culture that can meet the shifting demands of modern people as their attitudes toward naturalistic life. In this plan, sites of possible, a new housing complex is designed to supplement the site partition problem of existing housing complex by using attractiveness that the site has as a residence environment in housing planning. The conclusion can be summarized as follows. 1. Currently, most residential developments on slopes are planned with excessive slope cutting or filling on existing natural slopes rather than utilizing existing contours. In consideration of this, this proposed plan uses the existing contours of the slope to the maximum capacity in site planning. 2. The majority of the home site buyers are between the ages 30's to 50's of middle to high level incomes. Reflecting the financial needs of these families, home construction was planned by using building methods that require lower costs. 3. Reflected open-space furtherance maximum at design of community equipment for party's offer to sale in lots persons, from site purchase recognition of construction to in package sale in lots way select. 4. Considered to preserve existing natural-food life in way financial world stroke maximum, and accomplish creation with existing vegetation. Also, did planting considering privacy, and considered vegetation's environment adaptation degree because using midland style vegetation. 5. Garden wished to offer an opportunity that can make by oneself directly depending on each fondness and character to tenants. If is this intuition, wished to design, and maintained spur of housing development because housing development uses maximum natural history style comparing with other power jars all. Also, because considering people who move in housing-development, designed, and tried to make housing-development that want to live most offering the convenience.

Full-space Cloud of Random Points with a Scrambling Metasurface

Li, Zile,Dai, Qi,Mehmood, Muhammad Q.,Hu, Guangwei,yanchuk, Boris Luk’,Tao, Jin,Hao, Chenglong,Kim, Inki,Jeong, Heonyeong,Zheng, Guoxing,Yu, Shaohua,Alù,, Andrea,Rho, Junsuk,Qiu, Cheng-Wei Nature Publishing Group UK 2018 Light, science & applications Vol.7 No.1

<▼1><P>With the rapid progress in computer science, including artificial intelligence, big data and cloud computing, full-space spot generation can be pivotal to many practical applications, such as facial recognition, motion detection, augmented reality, etc. These opportunities may be achieved by using diffractive optical elements (DOEs) or light detection and ranging (LIDAR). However, DOEs suffer from intrinsic limitations, such as demanding depth-controlled fabrication techniques, large thicknesses (more than the wavelength), Lambertian operation only in half space, etc. LIDAR nevertheless relies on complex and bulky scanning systems, which hinders the miniaturization of the spot generator. Here, inspired by a Lambertian scatterer, we report a Hermitian-conjugate metasurface scrambling the incident light to a cloud of random points in full space with compressed information density, functioning in both transmission and reflection spaces. Over 4044 random spots are experimentally observed in the entire space, covering angles at nearly 90°. Our scrambling metasurface is made of amorphous silicon with a uniform subwavelength height, a nearly continuous phase coverage, a lightweight, flexible design, and low-heat dissipation. Thus, it may be mass produced by and integrated into existing semiconductor foundry designs. Our work opens important directions for emerging 3D recognition sensors, such as motion sensing, facial recognition, and other applications.</P></▼1><▼2><P><B>Metasurfaces: scrambling light for 3D detection and recognition</B></P><P>Firing light at a manufactured 'metasurface'—one carrying patterns at a smaller scale than the wavelength of the light—fills large volumes of space with defined points of light, potentially improving 3-D recognition and sensor applications. Cheng-Wei Qui and colleagues at the National University of Singapore, with co-workers across Asia and in the USA, created their unique metasurface from amorphous silicon. Light is scattered from and transmitted through the material to generate a cloud of data points in the surrounding space in which the structure and motion of objects under study can be analyzed. The initial development work with this “scrambling metasurface” suggests it could improve pattern recognition, including face recognition, motion detection and augmented reality applications. The researchers describe how their innovation overcomes significant limitations of existing methods in these fields.</P></▼2>

The Study of the Cycle Time Improvement by Work-In-Process Statistical Process Control Method for IC Foundry Manufacturing

Yu Cheng Lin,Chih Hung Tsai,Rong Kwei Li,Ching Piao Chen,Hsien Ching Chen 한국품질경영학회 2008 The Asian Journal on Quality Vol.9 No.3

The definition of cycle time is the time from the wafer start to the wafer output. It usually takes one or two months to get the product since customer decides to produce it. The cycle time is a critical factor for customer satisfaction because it represents the response time to the market. Long cycle time reflects the ineffective investment for the capital. The cycle time is very important for foundry because long cycle time will cause customer unsatisfied and the order loss. Consequently, all of the foundries put lots of human source in the cycle time improvement. Usually, we make decisions based on the experience in the cycle time management. We have no mechanism or theory for cycle time management. We do work-in-process (WIP) management based on turn rate and standard WIP (STD WIP) set by experiences. But the experience didn`t mean the optimal solution, when the situation changed, the cycle time or the standard WIP will also be changed. The experience will not always be applicable. If we only have the experience and no mechanism, management will not be work out. After interview several foundry fab managers, all of the fab can`t reflect the situation. That is, all of them will have an impact period after product mix or utilization varied. In this study, we want to develop a formula for standard WIP and use statistical process control (SPC) concept to set WIP upper/lower limit level. When WIP exceed the limit level, it will trigger action plans to compensate WIP Profile. If WIP Profile balances, we don`t need too much WIP. So WIP level could be reduced and cycle time also could be reduced.

Performance Analysis of Permanent Magnet Brushless Motors for Mobility Scooters

Yu-Chuan Lu,Ming-Yang Cheng,Chun-Hsien Wu,Wei-Chih Chen,Cheng-Hu Chen 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5

Most modern commercial electric scooters are still equipped with the DC brush motor. This type of motor has mechanical structures such as permanent magnet, brush, and commutator. Therefore, it has attractive features, e.g., large start-up torque and easy to control. However, this kind of mechanical commutation often leads to drawbacks such as low power density, low reliability, and poor heat dissipation. In contrast, the Permanent Magnet Brushless Motors (PMBLMs) have advantages such as high efficiency and maintenance free, etc. Hence, the PMBLMs have great potential in becoming the actuators for electric scooters. In this paper, the performance of the PMBLMs with trapezoidal and sinusoidal back-emf waveforms driven by square wave commutation and sinusoidal commutation is investigated. To reduce the cost, low-resolution Hall sensors are used to implement sinusoidal commutation.

IoT-base Generic Intelligent Wireless Sensing Platform for Real-time Data Collection and Distribution Data Analysis

( Yu-cheng Yang ),( Kai-sheng Tseng ),( Xiang-yu Huang ),( Sheng-hao Chen ),( Joe-air Jiang ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

In this study, a generic intelligent wireless sensing platform with the IoT and wireless transmission technology is established for greenhouse monitoring, which is capable of greenhouse data collection and analysis. The data analyzed by a cloud server would provide important information regarding the efficiency of greenhouse management and cultivation methods. To monitor greenhouse related parameters, an embedded board is placed in a greenhouse as the gateway. Monitoring data and images collected by sensors deployed in the greenhouse are transmitted to the embedded board via an Ethernet or wireless transmission module. The data are eventually sent to a database by wireless AP. The AP connects to the internet by using a 4G USB dongle, which can provide sufficient data transmission speed for real-time data transmission. In wireless hotspots and areas with Wi-Fi, not only can images be transmitted to the cloud, but also can the mobile APP be used to perform remote monitoring, so experimental observations are no longer affected by geographical impacts. Moreover, to ensure the preservation of images and numeric data, the gateway carries a high durability secure digital (SD) memory card to store images and data; if the network encounters some problems, such as unable to connect and a lack of network traffic, the data can be stored in the SD card. Thus, the proposed platform is able to perform heavy information transmission duties and support performing all wireless monitoring tasks. In addition, the analyzed data can be used by agricultural personnel to provide critical cultivation suggestions.

A study on Safe Pork Consumption Behavior in Taiwan

( Cheng-wei Chen ),( Yu-ping Fan ),( Cheng-hsing Yeh ) 한국농업경제학회 2009 KOREAN JOURNAL OF AGRICULTURAL ECONOMICS(KJAT) Vol.50 No.3

Pork is the most popular meat in Taiwan, that makes hog industry an important agriculture industry. The government had lauched the traceability system of agricultural products from 2004. It is needed to appreciate the policy affecting consumers’ willingness to buy safe pork for hog industry to separate market. This research use consumer decision process model and market segmentation to separate four respective factors as age group, educational background, family income, and the population element as family structure to find out the habit of safe pork consumption. This study was based on household as its unit, and had conducted questionnaire survey upon the primary purchasers of pork, which were then analyzed with descriptive statistics, Chi-square test, and the logit model so as to differentiate the preference of demographic characteristics among consumers with various features. This research indicated consumers with more members of household, older, less educated,less income, less cognitive about pork risk would have higher possibility to buy warm pork. Consumers with female, more educated, more income, more cognitive about pork risk would have higher willingness to pork with traceability system.However consumers in Taiwan still prefer buy warm body pork, little perception about pork marketing risk. The government should improve pork safety by more inspecting hog farms, processing factories and markets and educating consumers the knowledge of safe pork by television broadcasting and other mass media.

Hydration of DCPD over sulfonic acid-functionalized SBA-15 catalyst

Yu-Cheng Lin,Yu-Wei Huang,Ku-Hsiang Sung,Tsung-Han Lin,Soofin Cheng 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.44 No.-

Sulfonic acid-functionalized SBA-15 materials (SA-SBA-15) with ordered channeling pores weresynthesized by one-pot co-condensation and used to catalyze the hydration of dicyclopentadiene(DCPD). The target product, cydecanol (DCPD-OH) has been used as a modifier for polyester or alkydresin. Propylsulfonic acid functionalized SBA-15 was found to be more efficient than the silica gelcounterpart or arylsulfonic acid functionalized material in catalyzing DCPD hydration to yield DCPD-OH. The DCPD conversion and DCPD-OH yield increased with the decrease in H2O/DCPD ratio. Optimal DCPDconversion and DCPD-OH selectivity were obtained with the molar composition of DCPD:H2O:H+[1TD$DIF]-catalyst = 1:30:0.1.