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Fogging and water spray velocity to reduce dust cement widespread

IOP Conference Series: Earth and Environmental Science 2018年第1期200卷

作者： J Purwanta T Marnoto P Setyono A H Ramelan Doctoral Program in Environmental Science Graduate Program Universitas Sebelas Maret Jl. Ir. Sutami 36 A Kentingan Surakarta 57126 Indonesia Department of Chemical Engineering Universitas Pembangunan Nasional Veteran Yogyakarta Jl. SWK 104 Condongcatur Depok Sleman Yogyakarta 55283 Indonesia Faculty of Mathematics and Natural Science Universitas Sebelas Maret Jl. Ir. Sutami 36 A Kentingan Surakarta 57126 Indonesia

Climate change as the global issue should be analysed from mitigating especially in the cement industrial. This industry contributes up to 6% to the global warming. Cement plants must already take over management of the cement dust arising mainly on the production. However, there are still many who are exposed to cement dust into the surrounding environment, due to the dust cement contributes to air pollutant and give impact to climate change. This research aims to study the various strategies to catch a smooth dust using fogging methods with variable water speed. In such a device, as media dust catcher is mist generated from water which is converted into mist by sprayer. The dust catcher instrument installed at the location after the end of the cement factory chimneys. Of course, in order not to complicate the technical implementation in the chimney is curved downward so it is easier to install dust extraction tool such fogging method. The tool optimal conditions occur in the water velocity 110 ml per min with an efficiency of 63.60%. In the water velocity 110 ml per min it will form a mist with the optimal amount, if the water velocity is greater than 110 ml per min will tend to form droplets, on the contrary if the water velocity is less than 110 ml per min of the amount of haze formed is not maximized.

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An Improvement Data Hiding Scheme Based on Formula Fully Exploiting Modification Directions and Pixel Value Differencing Method 11

An Improvement Data Hiding Scheme Based on Formula Fully Exp...

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11th Asia Joint Conference on Information Security, AsiaJCIS 2016

作者： Kuo, Wen-Chung Li, Jyun-Jia Wang, Chun-Cheng Wuu, Lih-Chyau Huang, Yu-Chih Department of Computer Science and Information Engineering National Yunlin University of Science and Technology Taiwan Graduate School of Engineering Science and Technology Doctoral Program National Yunlin University of Science and Technology Taiwan Department of Information Management Tainan University of Technology Taiwan

ISBN: (纸本)9781509022854

Recently, a modified data hiding scheme based on pixel value differencing and improving exploiting modification directions is proposed by Shen and Huang. There are two major contributions in this scheme. One is to enhance the embedding rate and good embedding capacity and the other is an optimization problem used to solve the overflow/ underflow problem. In fact, they propose the similar brute force method to solve overflow/underflow problem in their proposed scheme. To overcome the overflow/underflow problem exactly, we will propose the close form to solve this problem in this paper. Then, an improvement data hiding scheme based on FFEMD (Formula Fully Exploiting Modification Directions) and pixel value differencing method is proposed. According to our analysis, it is not only to keep the advantages of Shen-Huang scheme but also to use the close form to solve the overflow/ underflow problem. © 2016 IEEE.

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Techno-economic analysis of a central receiver power plant with different levels of storage capacity and hybridization

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AIP Conference Proceedings 2018年第1期2033卷

作者： Daniel L. C. Costa José H. M. Neto 1Energy Engineering Master’s Degree Mechanical Engineer. Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering – Master Program of Energy Engineering. Address: Av. Amazonas 7675 Belo Horizonte-MG Brazil 30510-000. Phone: +55-31-999986464 2Civil Engineering Doctoral Degree Mechanical Engineering Master’s Degree Mechanical Engineer. Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering – Master Program of Energy Engineering. Address: Av. Amazonas 7675 Belo Horizonte-MG Brazil 30510-000

The energy storage and fossil-backup (fossil-hybridization) systems of a concentrating solar power plant (CSP) provide a continuous production of energy all over the year and satisfy the grid demand even when the sun is not shining. One could ask about the behavior of the energy production, or the levelized energy cost, as a function of the energy storage and of the fossil-hybridization in such plants. This paper tries to answer this question. For this task, there have been performed numerous simulations on a central receiver plant with a fixed nominal power, varying the storage capacity and the level of hybridization. The results showed that these variables impact differently. For the thermal storage, from capacities ranging from 0h to 24h, there is a specific intermediary capacity, 15h, in which the levelized energy cost is minimum. But for the fossil-hybridization, this energy cost always decreases with the increment of the hybrid level. The results also showed that, if a given energy production is supported by a certain level of hybridization, its energy cost would be less than that supported by a storage system. This is due to the relatively high investment costs related to the storage system, and the relatively low cost of fuel.

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Water quality of the Garang River, Semarang, Central Java, Indonesia based on the government regulation standard

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Journal of Physics: Conference Series 2018年第1期1025卷

作者： R M D Ujianti S Anggoro A N Bambang F Purwanti Doctoral Program of Coastal Resources Management Diponegoro University Faculty of Engineering and Informatics PGRI University Semarang Jl. Sidodadi Timur 24. Dr. Cipto Semarang Indonesia Faculty of Fisheries and Marine Science Diponegoro University Jl. Prof. Soedharto SH Tembalang Semarang Indonesia 50275

The Garang watershed composed by three main river streams has been managed by the Regional water company of the Semarang city, Central Java for drinking water supply. A river is often polluted by domestic waste and industrial effluents. Therefore water quality of the river should be keep to meet the Government regulation standard. The study aims to analyze water quality of the Garang' river using pollution index based on the government regulation. Series data from 2010 to 2016 were derived from the Environmental and Forestry Office of the Central Java Province and sampling of water quality was taken in August 2017 from the middle of watershed area. Water quality parameters include temperature, pH, TDS, DO, COD, Phosphate, Nitrate, Chromium, Copper, Cadmium and H2S. The research indicates that concentration of Copper has exceeds the standard of the Government Regulation No. 82 Year 2001. The water pollution index is 1.23, its means that the river is lightly polluted. Therefore the river should be managed comprehensively for sustainable uses in order to create one river one management concept.

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Dynamic Soil-Structure Interaction Using ITM-FEM Approach

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Journal of Physics: Conference Series 2018年第1期1028卷 012071-012071页

作者： Hidajat Lesmana Soegiarso, Roesdiman Rastandi, Josia Irwan Hasyim, Cholil Setiawan, Muhammad Ikhsan Kurniasih, Nuning Ansari Saleh Ahmar Department of Civil Engineering Doctoral Program Tarumanagara University Jakarta 11440 Indonesia Department of Management Darul Ulum University Jombang Jawa Timur 61419 Indonesia Department of Civil Engineering Narotama University Surabaya Jawa Timur 60117 Indonesia Faculty of Communication Science Library & Information Science Universitas Padjadjaran Bandung Jawa Barat 45363 Indonesia Department of Statistics Universitas Negeri Makassar Indonesia

The effect of dynamic soil-structure interaction is really important to be examined. Moreover if the structure is nuclear power structure or multi-storey structure. In solving the dynamic problem caused by dynamic mass on the soil-structure and interaction, it will use wavelet transform. This study aims to examine the dynamic soil-structure interaction using ITM-FEM approach. In this study, soil is considered as a semi-infinite media in z-direction with unbounded domain in x-direction. The characteristic of material is considered as an isotropic, homogenous, and linear elastic material, and the material damping seems not dependent on the frequency. The dynamic soil-structure interaction using ITM-FEM approach is conducted by counting dynamic stiffness matrix { D^FE }, space truss, hexahedron solid coupling element between FEM and ITM.

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A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

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AIP Conference Proceedings 2017年第1期1887卷

作者： Oswyn K. Wattimena Antoni Djwantoro Hardjito 1Doctoral Program in Civil Engineering Petra Christian University Indonesia 2Civil Engineering Department Petra Christian University Indonesia

There are more than four decades since the last 1970s where geopolymers concrete was first introduced and developed to use as a replacement to conventional concrete material which uses cement as a binder. And since the last two decades, geopolymers which utilized fly ash as aluminosilicate source material, i.e. fly ash based geopolymers, have been investigated. Many researchers present how to produce the best fly ash based geopolymer with a various source of constituent material as well as mixing formula to achieve exceptional concrete performance. Although there is a similar trend towards factors affecting the result of fly ash based geopolymer synthesis, there is still remain a wide range in mixture proportion. The considerable variation in fly ash characteristics as source material in the synthesis can very likely be one of the causes of this problem. This paper attempts to identify the effect of source material variation of geopolymer concrete, particularly which use fly ash as source material and focuses on the variation of its characteristics and the effects to properties of concrete. From the reviews it concluded that different sources (and even the same source, but different batch) of fly ash materials will give some different characteristics of the fly ash, where it would affect the synthesis process of the fly ash based geopolymer concretes.

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A preliminary study of mechanistic approach in pavement design to accommodate climate change effects

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IOP Conference Series: Earth and Environmental Science 2018年第1期129卷

作者： S R Harnaeni F P Pramesti A Budiarto A Setyawan Doctoral Program in Civil Engineering Faculty of Engineering Universitas Sebelas Maret Jl. Ir. Sutami 36A Kentingan Surakarta Central Java 57126 Indonesia Civil Engineering Department Universitas Muhammadiyah Surakarta Jl. A. Yani Pabelan Kartasura Tromol Pos 1 Surakarta Central Java 57102 Indonesia Civil Engineering Department Universitas Sebelas Maret Jl. Ir. Sutami 36A Kentingan Surakarta Central Java 57126 Indonesia

Road damage is caused by some factors, including climate changes, overload, and inappropriate procedure for material and development process. Meanwhile, climate change is a phenomenon which cannot be avoided. The effects observed include air temperature rise, sea level rise, rainfall changes, and the intensity of extreme weather phenomena. Previous studies had shown the impacts of climate changes on road damage. Therefore, several measures to anticipate the damage should be considered during the planning and construction in order to reduce the cost of road maintenance. There are three approaches generally applied in the design of flexible pavement thickness, namely mechanistic approach, mechanistic-empirical (ME) approach and empirical approach. The advantages of applying mechanistic approach or mechanistic-empirical (ME) approaches are its efficiency and reliability in the design of flexible pavement thickness as well as its capacity to accommodate climate changes in compared to empirical approach. However, generally, the design of flexible pavement thickness in Indonesia still applies empirical approach. This preliminary study aimed to emphasize the importance of the shifting towards a mechanistic approach in the design of flexible pavement thickness.

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Designing a hands-on brain computer interface laboratory course

Designing a hands-on brain computer interface laboratory cou...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Bahar Khalighinejad Laura Kathleen Long Nima Mesgarani Department of Electrical Engineering Columbia University New York NY Doctoral Program in Neurobiology and Behavior Columbia University New York NY

Devices and systems that interact with the brain have become a growing field of research and development in recent years. engineering students are well positioned to contribute to both hardware development and signal analysis techniques in this field. However, this area has been left out of most engineering curricula. We developed an electroencephalography (EEG) based brain computer interface (BCI) laboratory course to educate students through hands-on experiments. The course is offered jointly by the Biomedical engineering, Electrical engineering, and Computer Science Departments of Columbia University in the City of New York and is open to senior undergraduate and graduate students. The course provides an effective introduction to the experimental design, neuroscience concepts, data analysis techniques, and technical skills required in the field of BCI.

关键词： Electroencephalography Hardware MATLAB Data analysis Electrodes

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Effect of space structures against development of transport infrastructure in Banda Aceh by using the concept of transit oriented development

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AIP Conference Proceedings 2017年第1期1903卷

作者： Fadhly Noer A. Rahim Matondang Sirojuzilam Sofyan M. Saleh 1Doctoral Student of the School Pascasarjana Regional Planning University of North Sumatera Indonesia (Lecturer at engineering faculty university of Syiah Kuala) 2Doctoral Program in Educational Pascasrjana Regional Planning University of North Sumatera Indonesia 3Doctoral Program in Educational Pascasrjana Regional Planning University of North Sumatera Indonesia 4Faculty of Civil Engineering Department of the University of Syiah Kuala Indonesia

Due to the shifting of city urban development causing the shift of city services center, so there is a change in space pattern and space structure in Banda Aceh, then resulting urban sprawl which can lead to congestion problem occurs on the arterial road in Banda Aceh, it can be seen from the increasing number of vehicles per year by 6%. Another issue occurs by urban sprawl is not well organized of settlement due to the uncontrolled use of space so that caused grouping or the differences in socioeconomic strata that can impact to the complexity of population mobility problem. From this background problem considered to be solved by a concept that is Transit Oriented Development (TOD), that is a concept of transportation development in co-operation with spatial. This research will get the model of transportation infrastructure development with TOD concept that can handle transportation problem in Banda Aceh, due to change of spatial structure, and to find whether TOD concept can use for the area that has a population in medium density range. The result that is obtained equation so the space structure is: Space Structure = 0.520 + 0.206X3 + 0.264X6 + 0.100X7 and Transportation Infrastructure Development = -1.457 + 0.652X1 + 0.388X5 + 0.235X6 + 0.222X7 + 0.327X8, So results obtained with path analysis method obtained variable influences, node ratio, network connectivity, travel frequency, travel destination, travel cost, and travel time, it has a lower value when direct effect with transportation infrastructure development, but if the indirect effect through the structure of space has a greater influence, can be seen from spatial structure path scheme – transportation infrastructure development.

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A thermal performance comparison of residential envelopes at the tropical highland for occupants' thermal comfort

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IOP Conference Series: Earth and Environmental Science 2018年第1期200卷

作者： Hermawan Sunaryo A Kholil Department of Architecture Qur'anic Science Kalibeber Street KM.03 Wonosobo 56351 Indonesia Doctoral Program inArchitecture Diponegoro University Prof Sudarto Street Semarang 50275 Indonesia Department of Mechanical Engineering Qur'anic Science Kalibeber Street KM.03 Wonosobo 56351 Indonesia Department of Postgraduate Qur'anic Science Kalibeber Street KM.03 Wonosobo 56351 Indonesia

Climate change affects the thermal performance of buildings. A building's thermal performance is influenced by its envelopes, such as roof, wall, and floor. A different building envelope may create a different thermal condition which may also influence its occupants' comfort. This research aims at analyzing the residential thermal performance at the tropical highland areas by examining the deviation between the outer and inner space's air temperature and humidity. The research employed a quantitative method by measuring the air temperature and humidity for 24 hours which were recorded every one hour. There were 15 houses with various building envelope materials as the samples. Since highland has colder air temperature, the differences between thermal variables of the outer and inner space's of the residentials were observed to figure out the longest warming. The warming process is associated with the occupants' thermal comfort standards. The results showed there are two types of residential producing the longest warming (23 hours) which in accordance with the occupants' thermal comfort standards. The first type is the house enveloped with roof tiles, wooden walls, and an earthen floor, while the second one is a residential house enveloped with a zinc roof, exposed stone walls, and an earthen floor.

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