Extended Maximal Covering Location and Vehicle Routing Problems in Designing Smartphone Waste Collection Channels: A Case Study of Yogyakarta Province, Indonesia

Most people will store smartphone waste or give it to others; this is due to inadequate waste collection facilities in all cities/regencies in Indonesia. In Yogyakarta Province, there is no electronic waste collection facility. Therefore, an e-waste collection network is needed to cover all potential e-waste in the province of Yogyakarta. This study aims to design a collection network to provide easy access to facilities for smartphone users, which includes the number and location of each collection center and the route of transporting smartphone waste to the final disposal site. We proposed an extended maximal covering location problem to determine the number and location of collection centers. Nearest neighbor and tabu search are used in forming transportation routes. The nearest neighbor is used for initial solution search, and tabu search is used for final solution search. The study results indicate that to facilitate all potential smartphone waste with a maximum distance of 11.2 km, the number of collection centers that must be established is 30 units with three pick-up routes. This research is the starting point of the smartphone waste management process, with further study needed for sorting, recycling, repairing, or remanufacturing after the waste has been collected.

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Collecting Small-Waste Electrical and Electronic Equipment in Poland—How Can Containers Help in Disposal of E-Waste by Individuals?

Sustainability ◽

10.3390/su132212422 ◽

2021 ◽

Vol 13 (22) ◽

pp. 12422

Author(s):

Piotr Nowakowski ◽

Sandra Kuśnierz ◽

Julia Płoszaj ◽

Patrycja Sosna

Keyword(s):

Waste Disposal ◽

Electronic Waste ◽

Electronic Equipment ◽

Easy Access ◽

Waste Collection ◽

Residential Areas ◽

Support Design ◽

Location Selection ◽

Information Campaigns ◽

Waste Container

The effectiveness of e-waste collection depends on organizational and social factors. Individuals should have easy access to collection points and be aware of proper methods of e-waste disposal. This article investigates the availability, usability, and occurring irregularities of the container collection of small-waste electrical and electronic equipment. The study explores the attitude and behavior of individuals when disposing of small-waste equipment in the South of Poland. The results show that ninety-five percent of supermarkets’ managers responsible for waste management find a growing interest in the disposal of small e-waste by individuals. An increasing number of collection containers encourages residents to dispose of small-waste appliances. More than eighty-three percent of respondents are aware of proper methods of e-waste disposal. Additional information campaigns addressed to residents are required to prevent mixing electrical and electronic waste with other waste and to encourage the disposal of small e-waste. The intention to dispose of small e-waste was declared by only thirty-two percent of respondents. Containers with discarded easy breakable items, such as lamps, should be removed more frequently. The collection containers’ noticeability is evaluated by individuals as of average difficulty. The containers in supermarkets have simple designs and labels indicating the category of waste for disposal. The containers installed in residential areas have attractive designs and advertising slogans. The individuals expect the containers should be available in more locations that are easily accessible from households. The results of this study should be helpful for local authorities, waste collection companies, and waste electrical and electronic organizations, to support design, location selection, and information campaigns for small e-waste container collections.

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Determination of Optimal Public Transportation Routes Using Firefly and Tabu Search Algorithms

Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) ◽

10.29207/resti.v4i5.2259 ◽

2020 ◽

Vol 4 (5) ◽

pp. 884-891

Author(s):

Salwa Salsabila Mansur ◽

Sri Widowati ◽

Mahmud Imrona

Keyword(s):

Tabu Search ◽

Public Transportation ◽

Traffic Congestion ◽

Search Algorithm ◽

Urban Transportation ◽

The Public ◽

Comparison Results ◽

Congestion Problems ◽

Transportation Routes

Traffic congestion problems generally caused by the increasing use of private vehicles and public transportations. In order to overcome the situation, the optimization of public transportation’s route is required particularly the urban transportation. In this research, the performance analysis of Firefly and Tabu Search algorithm is conducted to optimize eleven public transportation’s routes in Bandung. This optimization aims to increase the dispersion of public transportation’s route by expanding the scope of route that are crossed by public transportation so that it can reach the entire Bandung city and increase the driver’s income by providing the passengers easier access to public transportations in order to get to their destinations. The optimal route is represented by the route with most roads and highest number of incomes. In this research, the comparison results between the reference route and the public transportation’s optimized route increasing the dispersion of public transportation’s route to 60,58% and increasing the driver’s income to 20,03%.

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Feasibility of Using Floor Vibration to Detect Human Falls

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18010200 ◽

2020 ◽

Vol 18 (1) ◽

pp. 200

Author(s):

Yu Shao ◽

Xinyue Wang ◽

Wenjie Song ◽

Sobia Ilyas ◽

Haibo Guo ◽

...

Keyword(s):

Machine Learning ◽

Human Body ◽

Nearest Neighbor ◽

Body Movement ◽

Modern Society ◽

Recognition System ◽

Machine Learning Algorithms ◽

K Nearest Neighbor ◽

Study Results ◽

Floor Vibration

With the increasing aging population in modern society, falls as well as fall-induced injuries in elderly people become one of the major public health problems. This study proposes a classification framework that uses floor vibrations to detect fall events as well as distinguish different fall postures. A scaled 3D-printed model with twelve fully adjustable joints that can simulate human body movement was built to generate human fall data. The mass proportion of a human body takes was carefully studied and was reflected in the model. Object drops, human falling tests were carried out and the vibration signature generated in the floor was recorded for analyses. Machine learning algorithms including K-means algorithm and K nearest neighbor algorithm were introduced in the classification process. Three classifiers (human walking versus human fall, human fall versus object drop, human falls from different postures) were developed in this study. Results showed that the three proposed classifiers can achieve the accuracy of 100, 85, and 91%. This paper developed a framework of using floor vibration to build the pattern recognition system in detecting human falls based on a machine learning approach.

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Towards a Smart E-Waste System Utilizing Supply Chain Participants and Interactive Online Maps

Recycling ◽

10.3390/recycling6010008 ◽

2021 ◽

Vol 6 (1) ◽

pp. 8

Author(s):

Tetiana Shevchenko ◽

Michael Saidani ◽

Yuriy Danko ◽

Ievgeniia Golysheva ◽

Jana Chovancová ◽

...

Keyword(s):

Waste Management ◽

Business Model ◽

Electronic Waste ◽

Precious Metals ◽

Local Delivery ◽

Waste Collection ◽

Business Model Canvas ◽

Online Maps ◽

Delivery Services ◽

Reduction Of Co2

Efficient electronic waste (e-waste) management is one of the vital strategies to save materials, including critical minerals and precious metals with limited global reserves. The e-waste collection issue has gained increasing attention in recent years, especially in developing countries, due to low collection rates. This study aims to search for progressive solutions in the e-waste collection sphere with close-to-zero transport and infrastructure costs and the minimization of consumers’ efforts towards an enhanced e-waste management efficiency and collection rate. Along these lines, the present paper develops a smart reverse system of e-waste from end-of-life electronics holders to local recycling infrastructures based on intelligent information technology (IT) tools involving local delivery services to collect e-waste and connecting with interactive online maps of users’ requests. This system considers the vehicles of local delivery services as potential mobile collection points that collect and deliver e-waste to a local recycling enterprise with a minimum deviation from the planned routes. Besides e-waste transport and infrastructure costs minimization, the proposed smart e-waste reverse system supports the reduction of CO2 through the optimal deployment of e-waste collection vehicles. The present study also advances a solid rationale for involving local e-waste operators as key stakeholders of the smart e-waste reverse system. Deploying the business model canvas (BMC) toolkit, a business model of the developed system has been built for the case of Sumy city, Ukraine, and discussed in light of recent studies.

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PLANNING OF LOGISTICS SUPPORT FOR THE DISPOSAL OF HOUSEHOLD E-WASTE

EKONOMIKA I UPRAVLENIE: PROBLEMY, RESHENIYA ◽

10.36871/ek.up.p.r.2021.09.01.011 ◽

2021 ◽

Vol 1 (9) ◽

pp. 79-84

Author(s):

NGUYEN THI THU HUONG ◽

◽

O. N. LARIN ◽

◽

Keyword(s):

Supply Chain ◽

Cost Effectiveness ◽

Garbage Collection ◽

Electronic Waste ◽

Waste Collection ◽

Official Statistics ◽

Factors Associated ◽

The Creation ◽

The Cost

The article describes the factors associated with the planning of logistics support for the disposal of household electronic waste. Identifying these factors plays an important role in coordinating to ensure the cost-effectiveness of the costs of recycling e-waste at all stages of the supply chain from the source of waste to where it is accumulated and then recycled. The article describes the importance of such processes as: the development of a method for determining the volume of household electronic waste generated in the administrative-territorial district, the creation of a network of waste collection points, the determination of the amount and throughput of waste collection points, the need to organize garbage collection from the place of collection at the lowest cost. The study was conducted on the basis of an analysis of official statistics from the five most populous cities in Vietnam and thirty regions of Hanoi.

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KONDISI EKONOMI MASYARAKAT SEKITAR TPA WISATA EDUKASI TALANGANGGUNG DI DESA TALANGANGUNG KECAMATAN KEPANJEN KABUPATEN MALANG

J-PIPS (Jurnal Pendidikan Ilmu Pengetahuan Sosial) ◽

10.18860/jpips.v6i1.7046 ◽

2019 ◽

Vol 6 (1) ◽

pp. 22

Author(s):

Rofidah Tamami ◽

Sulistia Ningrum Ayu ◽

Nur Syamsiah ◽

Lailatul Munadifah

Keyword(s):

Organic Waste ◽

Disposal Site ◽

Waste Collection ◽

Final Disposal ◽

The People ◽

Educational Tourism ◽

Descriptive Approach ◽

Inorganic Waste ◽

Waste Bank ◽

Consumptive Behavior

Urban is identical to the high consumptive behavior of the people who will then leave a lot of garbage too. The uncontrolled volume of waste will certainly disrupt the survival of the people who live in that place. Waste itself can be divided into two categories, namely organic waste and inorganic waste, which means that there is still a possibility to be reprocessed. So that the garbage does not interfere with the survival of the community, a waste collection facility or a waste bank is made which will later be collected again at the Final Disposal Site. Research conducted using qualitative methods with a descriptive approach. This research was conducted with the aim to find out how much influence the existence of the Talangagung Kepanjen Final Disposal on the surrounding community's economy. From the results of the study, it was found that the Talangagung Landfill is in addition to being a landfill, as well as an educational tourism site. Besides Talangagung Landfill has economic potential that can help the economy of the surrounding residents.Keywords: economy; final disposal site; educational tourism

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Optimization of Waste Transportation System in Tembalang District, Semarang City

Jurnal Presipitasi Media Komunikasi dan Pengembangan Teknik Lingkungan ◽

10.14710/presipitasi.v17i2.128-137 ◽

2020 ◽

Vol 17 (2) ◽

pp. 128-137

Author(s):

Ajeng Lakshita Pramesti ◽

Sri Sumiyati ◽

Bimastyaji Surya Ramadan ◽

Budi Prasetyo Samadikun ◽

Sudarno Sudarno

Keyword(s):

Transportation System ◽

Operating Costs ◽

Waste Generation ◽

Waste Collection ◽

Work Time ◽

Transportation Services ◽

Network Analyst ◽

Optimal Average ◽

Transportation Routes ◽

Collection Point

Tembalang District has 206,271 residents, with 156,8 m3 amount of waste generated. Tembalang Sub-District has 18 waste collection point, 23 containers, and 7 transport vehicles to handle solid waste from the waste collection point to Jatibarang Landfill. The percentage of waste transportation services in Tembalang was 27%. There is some waste collection point that has not been able to accommodate waste generation from the Tembalang District residents. Road conditions, road types, and vehicle speeds of the waste transport route affect transporting waste and the remaining work time and the operational costs incurred. This research aims to plan a waste transportation system in Tembalang District by optimizing the work time and cost under the target desired by the relevant department. The average remaining work time is 2.28 hours, with a total of 21 trips/ day. Transportation routes are optimized using Network Analyst on GIS-based applications. Road conditions affect service time with an optimal average speed of 37.607 km h, which causes the addition of the number of trips after optimization increased to 34 trips/day with 31 containers. The average remaining work time is 1 hour. This optimization led to an increase in service percentage to 42%. Vehicle operating costs is increasing each year for about Rp. 694,262,870.53/year with a decrease in the price of fees of Rp. 1,983.59/householder/year due to the rise in service percentage.

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GROUNDWATER EXTRACTION MODELLING FOR KUALA LUMPUR WATER RESOURCE PLANNING

PLANNING MALAYSIA JOURNAL ◽

10.21837/pmjournal.v7.i1.74 ◽

2009 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Pieter E. Stek

Keyword(s):

Groundwater Resources ◽

Resource Planning ◽

Data Availability ◽

Groundwater Extraction ◽

Kuala Lumpur ◽

Surrounding Area ◽

Starting Point ◽

Study Results ◽

Preliminary Study ◽

Alternative Sources

Portable water consumption in Kuala Lumpur and the surrounding area is expected to grow by 34% from 2005 to 2010. This increase in demand will be met by the construction of new reservoirs. However, reservoirs are dependent on rainfall and during prolonged periods of drought, as occurred in 1998, they could become empty. Therefore it is of great importance to develop alternative sources of water supply, including groundwater, to mitigate the effects of a serious water crisis. In this paper, results from a preliminary study on Kuala Lumpur's groundwater resources are presented. Modelling of the city's groundwater resources is extremely difficult given the limitations imposed by data availability and the karstic nature of some aquifers. Hence, the research presented here serves as a starting point for further studies rather than providing any definitive conclusions. In addition to the study results, the planning implications of groundwater extraction are discussed.

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ENTANGLEMENT AND FRUSTRATION IN ORDERED SYSTEMS

International Journal of Quantum Information ◽

10.1142/s021974990300036x ◽

2003 ◽

Vol 01 (04) ◽

pp. 465-477 ◽

Cited By ~ 19

Author(s):

MICHAEL M. WOLF ◽

FRANK VERSTRAETE ◽

J. IGNACIO CIRAC

Keyword(s):

Ground State ◽

State Energy ◽

Nearest Neighbor ◽

Bell Inequalities ◽

Harmonic Oscillators ◽

Neighbor Interaction ◽

Gaussian States ◽

Classical Systems ◽

Entanglement Of Formation ◽

Starting Point

This article reviews and extends recent results concerning entanglement and frustration in multipartite systems which have some symmetry with respect to the ordering of the particles. Starting point of the discussion are Bell inequalities: their relation to frustration in classical systems and their satisfaction for quantum states which have a symmetric extension. We then discussed how more general global symmetries of multipartite systems constrain the entanglement between two neighboring particles. We prove that maximal entanglement (measured in terms of the entanglement of formation) is always attained for the ground state of a certain nearest neighbor interaction Hamiltonian having the considered symmetry with the achievable amount of entanglement being a function of the ground state energy. Systems of Gaussian states, i.e. quantum harmonic oscillators, are investigated in more detail and the results are compared to what is known about ordered qubit systems.

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