scholarly journals Safe Blast Design for Efficient and Sustainable Underwater Excavation: Art Meets Science!

2021 ◽  
Author(s):  
BALAMADESWARAN P ◽  
A.K. Mishra ◽  
E. Kumar ◽  
K. Manikanda Bharath
Keyword(s):  
Fragment Size ◽  
Blast Design ◽  
Drilling Parameters ◽  
Powder Factor ◽  
Proper Design ◽  
Aqueous Layer ◽  
High Level ◽  
Selection Of

Abstract Most of the dredging work associated with harbor, port, channel deepening, and other related operation requires underwater blasting due to the characteristics of material being dredged / moved. Underwater blasting is typically used to remove rocks for deepen harbours and channels, creating channels and levees, installing conduits, and other more specialised blasting operations that shall be completed below sea. Usually, such dredging work occurs in deep-water of varying between 16–20m in order to remove just few meters of rocks. Hence, this type of blasting activity needs high level of skill and familiarity than equivalent activities carried out above the surface of water because of aqueous layer over the its rock. Therefore, the factors such as selection of drilling parameters and drilling equipment, selection of appropriate explosives and accessories, usage of correct powder factor, determination of safe explosive charges per delay and selection of suitable personnel are studied carefully for accomplishing the successful underwater blasting operations. In addition to the above, the system shall also address the proper design for the underwater blasts to excavate the rock to the required depth keeping in view the permissible allowances of minimum and maximum depth and fragment size required. While adopting underwater blasts, adequate safety measures are also defined for safety of men, other vessels in the blasting zone and structures from blasting vibrations. Here, the authors broadly outline their approach with respect to underwater blasting using the existing blasting technology, with a case study.

GIS Based Multi-Criteria decision support system and machine learning for Hospital Site Selection case study Oran - Algeria

2022 ◽  
Vol 14 (1) ◽  
pp. 0-0
Keyword(s):  
Site Selection ◽  
Decision Makers ◽  
Analysis Method ◽  
Automatic Learning ◽  
Hospital Site ◽  
Set Up ◽  
High Level ◽  
Selection Of ◽  
The Ideal

The selection of hospital sites is one of the most important choice a decision maker has to take so as to resist the pandemic. The decision may considerably affect the outbreak transmission in terms of efficiency , budget, etc. The main targeted objective of this study is to find the ideal location where to set up a hospital in the willaya of Oran Alg. For this reason, we have used a geographic information system coupled to the multi-criteria analysis method AHP in order to evaluate diverse criteria of physiological positioning , environmental and economical. Another objective of this study is to evaluate the advanced techniques of the automatic learning . the method of the random forest (RF) for the patterning of the hospital site selection in the willaya of Oran. The result of our study may be useful to decision makers to know the suitability of the sites as it provides a high level of confidence and consequently accelerate the power to control the COVID19 pandemic.

Comparison and Evaluation of Organizational Transactions for Continuous Auditing and Business Compliance

2018 ◽  
Vol 9 (2) ◽  
pp. 1-23
Author(s):  
Rui Pedro Marques ◽  
Henrique Santos ◽  
Carlos Santos
Keyword(s):  
Real Time ◽  
Internal Control ◽  
Control Mechanisms ◽  
Continuous Auditing ◽  
Technical Details ◽  
Ontological Model ◽  
High Level ◽  
Execution Pattern

This article presents a comparator module which aims to compare, in real time, executions of organizational transactions with patterns of behaviors of these transaction executions, allowing the determination of which execution pattern is being followed by running each transaction. This is according to information received by the internal control mechanisms, which continuously monitors the transaction executions. A possible application using this module was deployed and results were obtained from a case study. The results prove effectiveness of the module, mainly because it is able to assess business compliance and the qualitative risk associated to each transaction execution while it is running, enabling an efficient continuous auditing application. The innovation of this article is ensured by the use of an ontological model to represent organizational transactions, which can be applicable to any type of transaction in any business area in order to audit transactions at a very low level, contrary to what happens in traditional auditing, which occurs at a high level (e.g. compare whether a completed transaction has followed a set of procedures). Besides the conceptualization, this work presents some technical details of development and discussion of results from the case study.

scholarly journals A marca própria e os seus aspectos negociais: um estudo de caso

2017 ◽  
Vol 8 (16) ◽  
Author(s):  
Edivaldo Fernandes Dos Santos Junior ◽  
Andréa Paula Osório Duque ◽  
Manoel Marcondes Machado Neto
Keyword(s):  
Careful Analysis ◽  
Private Label ◽  
Case Study Approach ◽  
Strategic Objectives ◽  
Chain Stores ◽  
Study Approach ◽  
A Company ◽  
Selection Of

Atualmente, as marcas comerciais surgem como atributos de diferenciação e de vantagem competitiva, criando valor para as empresas de varejo. Neste sentido, elas geralmente têm seus produtos associados a preços mais acessíveis, possibilitando a incorporação de um nicho de mercado ao negócio de supermercados e redes de lojas, além de gerar maior rentabilidade. Este estudo se propôs a examinar os aspectos relacionados à origem e ao fortalecimento de uma marca própria por meio de um estudo de caso. O objetivo geral consiste em investigar o desenvolvimento de uma marca própria em uma empresa de produtos naturais. A metodologia adotada é a da pesquisa descritiva, com dados qualitativos obtidos a partir de um estudo de caso único. A coleta de dados foi efetivada via entrevista com o diretor-executivo e a gerente de desenvolvimento de produtos de uma empresa do ramo de alimentos saudáveis. Os resultados demonstram, principalmente, que o desenvolvimento da marca própria pesquisada requereu análise criteriosa dos hábitos dos consumidores; determinação dos objetivos estratégicos; diferenciação competitiva por meio de escolha precisa de fornecedores; investimento maciço em marketing; além de diversificação dos veículos de comunicação.Palavras-chave: Marca. Marca Própria. Brand. Branding.The private label and its negotiation aspects: a case studyAbstractNowadays, trademarks appear as differentiating attributes and competitive advantage, creating value for retail companies. In this way, private labels usually have their products associated with more affordable prices, enabling the incorporation of market niches to supermarkets and chain stores, in addition to higher profitability. This study aimed to examine the issues related to the origin and strengthening of a private label through a case study. The overall objective is to investigate the development of a private label in a company of natural products. The methodology adopted is this study can be classified as an applied research, descriptive and qualitative data obtained through a case study approach. Data collection for the completion of the case study approach was carried out by an interview with the executive director and the product development manager. The results show mainly that the development of a private label required careful analysis of consumers’ habits; determination of strategic objectives; competitive differentiation through careful selection of suppliers; massive investment in marketing and media diversification.Keywords: Brand. Branding. Private Label.

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%.  

scholarly journals An Assessment of Alternative Low Level Calculation Methods for the Initial Selection of Conformers of Diastereomeric Esters

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Andrus Metsala ◽  
Sven Tamp ◽  
Kady Danilas ◽  
Ülo Lille ◽  
Ly Villo ◽  
...  
Keyword(s):  
Geometry Optimization ◽  
Reference Method ◽  
Low Level ◽  
Butyl Esters ◽  
Specific Object ◽  
Derivatizing Agent ◽  
High Level ◽  
Level Calculation ◽  
Selection Of

Critical assessment of performance of alternative molecular modeling methods depending on a specific object and goal of the investigation is a question of continuous interest. This prompted us to demonstrate the origin of the guidelines we have used for a rational choice and use of a proper low level calculation method (LLM) for an initial geometry optimization of generated conformers, with the aim of selecting a set for further optimization. What was performed herein was a comparison of LLMs: MM3, MM+, UFF, Dreiding, AM1, PM3, and PM6 on the optimization of conformers’ geometry of α-methoxyphenylacetic acid (MPA) 2-butyl esters as a set of typical diastereomeric esters of a chiral derivatizing agent. This set of esters calculated represents only compounds of this certain type in the current work. The LLM conformer energies were correlated with benchmark energies found by using higher level reference method B3LYP/6-311++G** on the geometries gained previously by optimization with LLMs. In an alternative treatment, the energy range to be covered and corresponding number of LLM optimized conformers obligatory for submitting to further optimization using a high level optimization cascade were considered on the basis of determination of the cut-off conformer (COFC).

scholarly journals Determination of Watershed Characteristics and Curve Number (CN) for Ponnaniyaru Dam Catchment Area

2018 ◽  
Vol 7 (3.12) ◽  
pp. 558
Author(s):  
Selvakumar R ◽  
Nasir N ◽  
Suribabu C R
Keyword(s):  
Catchment Area ◽  
Curve Number ◽  
Drainage Density ◽  
Significant Parameter ◽  
Present Case Study ◽  
Scs Cn ◽  
Hydrologic Conditions ◽  
Selection Of

In SCS-CN method, curve number is significant parameter in estimating runoff from the catchment of the reservoir or inflow to the reservoir. As this curve number is function of several parameters like hydrological soil group, LULC, land treatment, hydrologic conditions and AMC, the selection of CN for prediction of inflow to the lake or reservoir is considered as a crucial in the hydrological studies. LULC, micro-watershed, drainage density, and catchment slope are obtained using spatial analysis and also SCS Curve Number value for Ponnaniyaru dam catchment area is derived from the LULC data. Further, CN value is evaluated from actual rainfall data and runoff volume collected at the reservoir. The study reveals the significant variation of CN value among each event. The present case study highlights the sensitiveness of CN value in the computation of runoff from the watershed. Keywords: Curve number, LULC, AMC, drainage density. 

scholarly journals PRELIMINARY ASSESSMENT OF THE EFFECTS OF BLAST DESIGN FACTORS ON FRAGMENTATION AT LAFARGE KANTHAN LIMESTONE QUARRY, CHEMOR, PERAK

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Shaib Abdulazeez Shehu ◽  
Mohd Hazizan Mohd Hashim ◽  
Nur Aliah Hazirah Awang Kechik
Keyword(s):  
Compressive Strength ◽  
Correlation Coefficient ◽  
Uniaxial Compressive Strength ◽  
Fragment Size ◽  
Design Parameters ◽  
Stiffness Ratio ◽  
Blast Design ◽  
Powder Factor ◽  
Controllable Factors ◽  
The Mean

The results of blasting affect every other downstream operation in quarrying and mining process. Factors influencing blast results can be classified as either controllable or non-controllable. If desired fragmentation is to be obtained, the controllable factors (blast geometry and explosive properties) must be sufficiently designed to match the non-controllable ones (geological factors and legislative constraints). This study investigates the influence of blast design parameters on rock fragmentation. Six different blast designs were studied and analyzed. Rock samples were obtained from each face to evaluate the uniaxial compressive strength (UCS). Images of muck pile were captured using suitable digital camera. The images were uploaded into the WipFrag software to analyze the fragmentation resulting from the blasting. The particle size distribution of each blast was obtained, and the mean fragment size correlated with the blast design parameters. The percentage cumulative passing for gyratory crusher with the feed size of 1500 mm ranges between 92.8 to 100%. The stiffness ratio, powder factor and uniaxial compressive strength have high correlation with mean fragment size. The stiffness ratio increases with mean fragment size with a correlation coefficient of 0.89. The mean fragment size becomes finer with increase in powder factor with a correlation coefficient of 0.76. Powder factor also has a high correlation with the uniaxial compressive strength of the rock. The higher the uniaxial compressive strength of rock, the higher the powder factor needed for a specified fragment size. In this study, spacing to burden ratio has a very weak correlation with the fragment size. All the studied blast events produced good fragmentation with a uniformity index varying from 2.097 to 2.525.

An Integrated Fuzzy Multi-Criteria Approach for E-Waste Collection Center Location Problem

2021 ◽  
Vol 10 (2) ◽  
pp. 21-38
Author(s):  
Hür Bersam Bolat ◽  
İrem Otay ◽  
Gül Tekin Temur ◽  
Şükrü İmre
Keyword(s):  
Fuzzy Ahp ◽  
Waste Recycling ◽  
Waste Collection ◽  
Location Selection ◽  
Recycling Industry ◽  
Center Location ◽  
Hierarchy Process ◽  
Selection Of

Selection of locations for collecting end of life goods is a multi-dimensional problem. In this study, the objective is to propose a hybrid multi-criteria decision model for e-waste collection center location selection problem employing an integrated Pythagorean fuzzy AHP (analytical hierarchy process)-VIKOR (multi-criteria optimization and compromise solution) methodology. A case study from Turkish e-waste recycling industry is conducted in order to verify the success of the proposed methodology. Thirty-nine alternative collection center districts are evaluated and ranked by employing Pythagorean fuzzy VIKOR based on “cost, logistics, environment, socio-culture, and population” and 11 sub-criteria. The study involves 39 e-waste collection location centers, and the model was solved for 50 times for 10 scenarios for each criterion. The results of sensitivity analysis indicate that the evaluation of criteria and determination of their weights have critical effects on the results.

scholarly journals Analisis Pendapatan Usahatani Padi Varietas Ciherang dengan menggunakan Sistem Tanam Legowo Jajar 2:1 (Studi Kasus di Subak Sengempel, Desa Bongkasa, Kecamatan Abiansemal, Kabupaten Badung)

2017 ◽  
Author(s):  
MATHEUS FRYNARDO KEUKAMA ◽  
I NYOMAN GEDE USTRIYANA ◽  
NI LUH PRIMA KEMALA DEWI
Keyword(s):  
Rice Production ◽  
Production Costs ◽  
Rice Farming ◽  
Labor Costs ◽  
Technical Problems ◽  
System 2 ◽  
Planting System ◽  
Selection Of

Rice Farming Revenue Analysis of Ciherang Varietyby using the PlantingSystem of Legowo Row 2:1 (A Case Study in the Subak of Sengempel, Bongkasa Village, Sub-District of Abiansemal, Badung Regency)Rice is one of the crops that has the potential to be developed economically. The waythat can be done to increase the rice production is by the use of superior and effectiveagricultural technology. Farmers in the Subak of Sengempel are growing the ricevarieties of Ciherang by using Legowo row planting system 2:1 to boost theproduction of rice. The purpose of the study was to determine the revenue, R/C ratioand the constraints of Ciherang varieties of rice farming using Legowo row plantingsystem 2:1 in the Subak of Sengempel, Bongkasa Village, Sub-District ofAbiansemal, Badung Regency. The selection of location was conducted purposively,and the determination of the respondents was taken by purposive sampling consistingof 30 farmers of respondents. The results of research of Ciherang varieties of ricefarming by using Legowo row planting system 2:1 showed that in one growingseason, the production costs incurred was Rp 15.533.330,99/hectare, obtaining Rp27.109.333,33/hectare, which generated revenues of Rp 11.576.002,34/hectare. TheR/C ratio was 1,75 per hectare and theobstacles facedwere technical problems in ricecultivation of Ciherang varieties. Farmers are advised to make the cultivation of ricevarieties of Ciherang using Legowo row planting system 2:1 because the ricefarming is profitable or feasible.The farmers should suppress or reduce theproduction costs, especially the labor costs outside of the household. The farmers areexpected to anticipate the pest attack in rice plants.

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