scholarly journals Recovery of Biomass Fly Ash and HDPE in Innovative Synthetic Lightweight Aggregates for Sustainable Geotechnical Applications

2020 ◽  
Vol 12 (16) ◽  
pp. 6552
Author(s):  
Daniela D. Porcino ◽  
Francesco Mauriello ◽  
Lucio Bonaccorsi ◽  
Giuseppe Tomasello ◽  
Emilia Paone ◽  
...  
Keyword(s):  
Fly Ash ◽  
Morphological Analysis ◽  
Chemical Properties ◽  
Lightweight Aggregates ◽  
Present Contribution ◽  
Strength Behavior ◽  
Biomass Fly Ash ◽  
The Right ◽  
Selection Of

Sustainable development principles aim to re-utilize wastes to reduce their impact on the environment. In this context, the present contribution shows preliminary results on the preparation of innovative synthetic lightweight aggregates, starting from biomass-derived fly ash and high-density polyethylene (HDPE), to be used in geotechnical applications. The present work focuses on the manufacturing process of aggregate blends (including the selection of the right proportions of the two components) as well as on the relative determination of (i) physical–chemical properties (i.e., chemical composition, morphological analysis, mineral leachability, water absorption, specific gravity, grain size distribution); (ii) permeability features and (iii) mechanical properties (one-dimensional compression and shear strength behavior). The results, gathered from the new synthetic lightweight aggregates and compared with the corresponding ones obtained in a previous study conducted on natural and synthetic lightweight aggregates, appear promising for a potential utilization in geotechnical engineering.

scholarly journals ДИЗАЙН-ПРОЕКТУВАННЯ СУЧАСНИХ СУКОНЬ З ОЗДОБЛЕННЯМ З УРАХУВАННЯМ ВЛАСТИВОСТЕЙ ТКАНИН

2020 ◽  
pp. 79-90
Author(s):  
К. Л. Пашкевич ◽  
О. В. Єжова ◽  
Т. Ф. Кротова ◽  
Н. Д. Креденець ◽  
Лю Цзянсінь ◽  
...  
Keyword(s):  
System Approach ◽  
Surface Density ◽  
Morphological Analysis ◽  
Physical And Mechanical Properties ◽  
Mechanical Parameters ◽  
Different Types ◽  
The Creation ◽  
Selection Of

To study the specifics of design-projection of clothes with finishing, considering the properties of fabrics. The system approach, as well as the methods of system-structural and morphological analysis, are used. The current collections of women`s clothes, presented by modern designers, have been analyzed; the current fashion trends in manufacturing and finishing of dress fabrics and products, made from such fabrics, have been identified; the classification of types of finishing of clothes has been presented. The frequency of occurrence of different types of finishing in the collections of world-famous designers in 2011 – 2019 has been determined. Physical and mechanical properties of samples of dress fabrics have been studied, in particular: thickness, surface density, abruption characteristics; their interconnections have been identified. The recommendations on the selection of fabrics for the creation of modern women`s dresses using different types of finishing (flat, volumetric) have been developed. The interconnections between physical and mechanical parameters of dress fabrics are identified, and the recommendations on the selection of fabrics for the creation of modern women`s dresses using the finishing based on the tectonic approach are developed. The conducted set of scientific researches on the design-projection of women`s dresses, based on the tectonic approach, and the determination of physical and mechanical parameters of dress fabrics are the basis for the development of recommendations on the selection of fabrics for the manufacturing of dresses with a variety of finishes.

scholarly journals PENENTUAN JURUSAN PADA PROSES PENERIMAAN MAHASISWA DENGAN PENDEKATAN LOGIKA FUZZY

2021 ◽  
Vol 8 (1) ◽  
pp. 193-200
Author(s):  
Ari Purno Wahyu ◽  
Umi Hayati
Keyword(s):  
Membership Function ◽  
Fuzzy Inference ◽  
Function Type ◽  
Academic Field ◽  
Computer Knowledge ◽  
Selection Test ◽  
The Right ◽  
High Level ◽  
Selection Of

Choosing a major is not an easy matter. There are many factors that must be taken into account and carefully thought out so that in choosing a major, it will cause big losses. There are many ways to determine the selection of majors, one of which is by using fuzzy logic. Determination of majors is determined from the results of the selection test in the academic field with the subjects of Mathematics, English and Computer Knowledge. With the aim of recommending the selection of the right major according to academic abilities and improving quality. By using the fuzzy inference model Mamdani max-min method. The system simulation was tried using the MATLAB Fuzzy Toolbox software. The system design is carried out in several stages, namely: (1) formation of fuzzy sets, (2) formation of rules, (3) determination of the composition of rules, and (4) confirmation (defuzzification). Defuzzification is carried out using the Composite Moment method, with the types of membership functions used are mf-triangular, mf-trapezoid and mf-gaussian. From the results of the tests carried out, it shows that the mf-triangular and mf-trapezoid membership function types produce almost the same level of accuracy. While the membership function type mf-gaussian produces a high level of accuracy for mathematics by 87.50%, English 100% and computer knowledge 81.58%.  

SISTEM PENDUKUNG KEPUTUSAN PENENTUAN MITRA KERJASAMA PADA HOTEL GRAND SIRAO DENGAN MENGGUNAKAN METODE PSI (Preference Selection Index)

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Hendri Cahaya Putra
Keyword(s):  
Decision Making ◽  
Decision Support ◽  
Decision Support System ◽  
Support System ◽  
Index Selection ◽  
Short Supply ◽  
Cooperation Partners ◽  
The Right ◽  
Selection Of

Grand Sirao Hotel is a hotel that stands in the middle of Medan City, located on Jl. Semarang. Grand Sirao Hotel is an attractive hotel in the sector of cooperation in certain fields, but in this hotel it often happens in cooperation with outside companies. One of the problems that often occurs at the Grand Sirao Hotel is the constrained stock of goods needed for guests staying at the hotel, items that are often constrained which are usually in the form of sandals and toiletries that are in short supply. This problem often arises because of the many other factors between companies related to hotel owners themselves, debates that often arise from hotel owner claims include quality of goods that are sometimes incompatible with reservations and need to be taken into account, inventory can be exhausted, prices always go up because of skyrocketing market prices and other problems. This collaboration problem arises due to lack of success in determining partnerships with related companies that are not appropriate and in company selection is also still manual and there are appropriate systems and criteria. Therefore a decision support system is needed in the selection of partners upon the proposed approval. One solution to this problem that is right is to make a decision system in the decision of the company's business partners so that the determination of cooperation in accordance with the right requirements. By using a Decision Support System (SPK) is expected to help the company in making decisions made by the right company partners in increasing the efficiency of the decision. PSI (Index Selection Preference Method) is a method for solving multi-decision making (MCDM) decisions. In the proposed method it is not necessary to submit among the attributes. There are no attributes required in computing that are involved in decision making. It is hoped that by using the PSI (Index Selection Preference) Method, it is necessary to establish a decision support system which can assist in the selection of corporate cooperation partners at the Grand Sirao Hotel.Keywords: Determination of Cooperation Partners, Decision Support System, PSI (Index Selection Preference)

Improvement of olfactometric measurement accuracy and repeatability by optimization of panel selection procedures

2010 ◽  
Vol 61 (5) ◽  
pp. 1267-1278 ◽  
Author(s):  
L. Capelli ◽  
S. Sironi ◽  
R. Del Rosso ◽  
P. Céntola ◽  
S. Bonati
Keyword(s):  
Degrees Of Freedom ◽  
Selection Procedure ◽  
Selection Procedures ◽  
Accuracy And Precision ◽  
Repeated Analysis ◽  
The Right ◽  
Accuracy And Repeatability ◽  
Selection Of ◽  
Dynamic Olfactometry

The EN 13725:2003, which standardizes the determination of odour concentration by dynamic olfactometry, fixes the limits for panel selection in terms of individual threshold towards a reference gas (n-butanol in nitrogen) and of standard deviation of the responses. Nonetheless, laboratories have some degrees of freedom in developing their own procedures for panel selection and evaluation. Most Italian olfactometric laboratories use a similar procedure for panel selection, based on the repeated analysis of samples of n-butanol at a concentration of 60 ppm. The first part of this study demonstrates that this procedure may originate a sort of “smartening” of the assessors, which means that they become able to guess the right answers in order to maintain their qualification as panel members, independently from their real olfactory perception. For this reason, the panel selection procedure has been revised with the aim of making it less repetitive, therefore preventing the possibility for panel members to be able to guess the best answers in order to comply with the selection criteria. The selection of new panel members and the screening of the active ones according to this revised procedure proved this new procedure to be more selective than the “standard” one. Finally, the results of the tests with n-butanol conducted after the introduction of the revised procedure for panel selection and regular verification showed an effective improvement of the laboratory measurement performances in terms of accuracy and precision.

scholarly journals Mechanical characteristics, as well as physical-and-chemical properties of the slag-filled concretes, and investigation of the predictive power of the metaheuristic approach

2019 ◽  
Vol 6 (1) ◽  
pp. 236-244 ◽  
Author(s):  
Kirill Borodin ◽  
Nurlan Zhangabayuly Zhangabay
Keyword(s):  
Swarm Intelligence ◽  
Chemical Properties ◽  
Network Algorithms ◽  
Optimisation Algorithm ◽  
The Neural Network ◽  
Statistical Determination ◽  
Physical And Chemical ◽  
Swarm Intelligence Algorithm ◽  
Selection Of

AbstractOur article is devoted to development and verification of the metaheuristic optimisation algorithm in the course of selection of the compositional proportions of the slag-filled concretes. The experimental selection of various compositions and working modes, which ensure one and the same fixed level of a basic property, is the very labour-intensive and time-consuming process. This process cannot be feasible in practice in many situations, for example, in the cases, where it is necessary to investigate composite materials with equal indicators of resistance to aggressive environments or with equal share of voids in the certain range of dimensions. There are many similar articles in the scientific literature. Therefore, it is possible to make the conclusion on the topicality of the above-described problem. In our article, we will consider development of the methodology of the automated experimental-and-statistical determination of optimal compositions of the slag-filled concretes. In order to optimise search of local extremums of the complicated functions of the multi-factor analysis, we will utilise the metaheuristic optimisation algorithm, which is based on the concept of the swarm intelligence. Motivation in respect of utilisation of the swarm intelligence algorithm is conditioned by the absence of the educational pattern, within which it is not necessary to establish a certain pattern of learning as it is necessary to do in the neural-network algorithms. In the course of performance of this investigation, we propose this algorithm, as well as procedure of its verification on the basis of the immediate experimental verification.

scholarly journals Penerapan Metode Promethee Sebagai Sistem Pendukung Keputusan Pemeringkatan Siswa

2019 ◽  
Vol 3 (4) ◽  
pp. 381
Author(s):  
Ronal Watrianthos ◽  
Kusmanto Kusmanto ◽  
Elida F. S. Simanjorang ◽  
Muhammad Syaifullah ◽  
Ibnu Rasyid Munthe
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Support System ◽  
Preference Ranking ◽  
Sample Data ◽  
Long Time ◽  
Main Input ◽  
The Right ◽  
Selection Of

Students rank requires several considerations and criteria. Determination of the criteria must be prepared as much as possible because it is related to the selection of outstanding students. However, this ranking is considered less than optimal and requires a long time because it is processed manually by the school. The right Decision Support System is needed to produce quick and accurate ranking decisions. This study uses the Preference Ranking Organization Method for Enrichment Evaluation (PROMETHEE) as a Decision Support System. This method will use multi-criteria as the main input in decision making. PROMETHEE will be used to analyze criteria based on alternatives compared to rank according to students' grades and abilities. Based on the research sample data, the highest value was 0.739 for alternative A16. This shows that alternative A16 is the best alternative compared to other alternatives based on consideration of all criteria. The development of PROMETHEE with application-based Decision Support Systems is much better because it produces fast and accurate calculations.

scholarly journals Supplier Selection Model of the Lithium-ion Battery using Fuzzy AHP and Analysis of BOCR

2018 ◽  
Vol 1 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Ari Wardayanti ◽  
Roni Zakaria ◽  
Wahyudi Sutopo ◽  
Bendjamin Benny Louhenapessy ◽  
◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Supplier Selection ◽  
Fuzzy Ahp ◽  
Lithium Ion ◽  
Quantitative Model ◽  
The Right ◽  
Hierarchy Process ◽  
Selection Of

Although the demand for the lithium-ion battery for electronic consumers and electric vehicles in Indonesia is high, there is no supplier coming from the local manufacturer. The proper selection of suppliers is required by some lithium-ion battery manufacturers (cells, modules, and packs), and Research and Development (R&D) center of the lithium-ion battery with the consideration not only in benefits and cost but also in opportunities and risks. It is important that experts assist the manufacturers and R&D to procure the lithium-ion (materials and cells), through transparent methods that seek a quantitative model to select the right supplier. The main objective of this study is to propose an analytical approach to select suppliers which incorporate Benefits, Opportunities, Costs and Risks (BOCR) concept that comply with the characteristics of the lithium-ion battery industries. A fuzzy Analytical Hierarchy Process (AHP) model is developed by accommodating the vagueness and inaccuracies of expert elections. The result of this research is development of the model obtained from 2 questionnaires given to the expert. Questionnaire 1 was made for the determination of criteria and sub-criteria, while Questionnaire 2 aims to perform pairwise comparisons of existing criteria and sub-criteria. In the selection of the lithium-ion battery suppliers, there are 11 criteria and 40 sub-criteria which are considered. Those criteria are divided into 4 merits and known for their respective global priorities.

scholarly journals Mineralogical studies of amphibolite outcrops within the Kryvyi Rih Basin

2020 ◽  
Vol 29 (1) ◽  
pp. 188-195
Author(s):  
Svitlana V. Tikhlivets ◽  
Valeriy D. Yevtiehov ◽  
Valentyna V. Filenko ◽  
Olena Y. Hrytsai
Keyword(s):  
Iron Ore ◽  
Regional Metamorphism ◽  
Mineralogical Composition ◽  
Laboratory Studies ◽  
Petrographic Analyses ◽  
The Status ◽  
The Right ◽  
Geological Observation ◽  
Selection Of

This study explores the mineralogical composition of the material of samples extracted from the outcrops of amphibolites located within the Kryvyi Rih Basin. Amphibolites of the Novokryvorizka suite of the Kryvorizka series are located in the area of Rodina mine of the Kryvyi Rih Iron Ore Enterprise (KRIOE) on the right bank of the Saksahan river, where the amphibolites crop out as an interrupted line. Over the recent years, industrial and geological tourism has been actively developing not only within Kryvyi Rih, but also in Ukraine in general. The Kryvyi Rih Basin has many objects which deserve the status of unique geological observation sites. One such site has amphibolites of the Novokryvorizka series, which rarely outcrop to the surface. Such an object is interesting and useful not only for interested tourists, but especially for geology students as an example of rocks that have been formed out of effusive eruption products during the geological process such as regional metamorphism. No other examples of their exposure have been observed in the area. The studied outcrops are unique, but recently, their reduction has been observed due to the poor level of their preservation. The relevance of this study is conditioned by necessity of conducting geological evaluation of the amphibolite outcrops with a view to the future use of this object for development of industrial and geological tourism within the Kryvyi Rih Basin. We studied all possible outcrops of the amphibolites within the surveyed territory, and analyzed the results of the previous studies on the topic. We developed a schematic image of the outcrops with consideration of their thicknesses. The mineralogical composition of all outcrops of the amphibolites was studied for further determination of the exact age of the amphibolites and opportunity of providing the amphibolite outcrops with the status of unique observation sites. For achieving the goal, we used the following methods of study: geological survey, selection of representative petrographic samples of the amphibolites, mineralogical and petrographic analyses, generalization of results of field and laboratory studies.

scholarly journals Inheritance of flower traits in ornamental pepper

2018 ◽  
Vol 39 (1) ◽  
pp. 50
Author(s):  
Angela Maria dos Santos Pessoa ◽  
Elizanilda Ramalho do Rêgo ◽  
Cristine Agrine Pereira dos Santos ◽  
Michelle Gonçalves de Carvalho ◽  
Júlio Carlos Polimeni de Mesquita ◽  
...  
Keyword(s):  
Morphological Analysis ◽  
Gene Action ◽  
Diallel Analysis ◽  
Breeding Programs ◽  
Petal Length ◽  
Anther Length ◽  
Flower Traits ◽  
Flower Diameter ◽  
Selection Of

Diallel crosses provide estimates of useful parameters in the selection of parents for hybridization. They also help in understanding the gene action behind the determination of characters of interest. The objective of this study was to determine the genetic control of flower traits in ornamental pepper based on a complete diallel with parents F1’s and reciprocal crosses. The experiment was conducted in a greenhouse at Laboratório de Biotecnologia Vegetal, Centro de Ciências Agrárias, Universidade Federal da Paraíba (CCA-UFPB). Seven accessions of ornamental pepper belonging to the CCA-UFPB Germplasm Bank UFPB001, UFPB004, UFPB77.3, UFPB099, UFPB134, UFPB137 and UFPB390 were used. The morphological analysis was performed on following quantitative Capsicum descriptors: days for flowering (DFL), flower diameter (FD), petal length (PL), number of petals (NP), number of stamens (NS), anther length (AL) and fillet length (FL). The data were previously submitted to analysis of variance and then to diallel analysis. All evaluated traits were adequate to the additive-dominant model. There are possibilities of genetic gains in breeding programs, for the NP, NS, AL and FL in ornamental peppers.

A Survey of Ash Sources for Mineral Recovery

1985 ◽  
Vol 65 ◽  
Author(s):  
J. S. Watson
Keyword(s):  
Fly Ash ◽  
Chemical Properties ◽  
Electric Power Research Institute ◽  
Chemical Analyses ◽  
Mineral Recovery ◽  
Utility Companies ◽  
Potential Resource ◽  
Ash Residue ◽  
Potential Use

ABSTRACTTwenty-two ash samples from utility companies across the country were studied to determine their potential use for mineral recovery. Most tests were limited to chemical analyses and determination of leachable metal values in the ashes, but samples from two utilities were examined in more detail. The more detailed analyses included physical as well as chemical properties. This work was part of a broad-based effort supported by the Electric Power Research Institute (EPRI), and the results from this study were used in economic assessments of mineral recovery from fly ash made by Kaiser Engineers in another part of the EPRI program. Although the compositions and properties of the ash samples varied considerably, only two of the 22 ash samples studied appeared to be unsuitable for mineral recovery. These results indicate that large portions of the ash produced in this country are suitable for potential resource recovery, but further work to evaluate potential upgrade of the leached ash residue is recommended.

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