Shift Scheduling of Short Time Workers in Large-Scale Home Improvement Center by using Cooperative Evolution

There are a lot of large-scale Home Improvement Center (HIC) in Japan. In the large-scale HIC,about hundred short time workers are registered. And about forty workers are working every day. A managercreates a monthly shift schedule. The manager selects the workers required for each working day, assigns theworking time and break time for each worker and also work placement. Because there are many requirementsfor the scheduling, the scheduling consumes time costs and efforts. Therefore, we propose the technique to createand optimize the schedule of the short time workers in order to reduce the burden of the manager. A cooperativeevolution is applied for generating and optimizing the shift schedule of short time worker. Several problems hasbeen found in carrying out this research. This paper proposes techniques to automatically create and optimize theshift schedule of workers in large-scale HIC by using a Cooperative Evolution (CE), to solve the situation thatmany workers concentrate in a speci c time zone, and to solve the situation where many breaks are concentratedin a speci c break time zone, and an effective mutation operators.

Download Full-text

Towards Control of an Estuary

Water Science & Technology ◽

10.2166/wst.1987.0077 ◽

1987 ◽

Vol 19 (9) ◽

pp. 155-174

Author(s):

Henk L. F. Saeijs

Keyword(s):

Shallow Water ◽

Storm Surge ◽

Salt Marshes ◽

Large Scale ◽

Western Europe ◽

Oxygen Depletion ◽

Negative Effects ◽

Intertidal Flats ◽

Environmental Consequences ◽

Short Time

The Delta Project is in its final stage. In 1974 it was subjected to political reconsideration, but it is scheduled now for completion in 1987. The final touches are being put to the storm-surge barrier and two compartment dams that divide the Oosterschelde into three areas: one tidal, one with reduced tide, and one a freshwater lake. Compartmentalization will result in 13% of channels, 45% of intertidal flats and 59% of salt marshes being lost. There is a net gain of 7% of shallow-water areas. Human interventions with large scale impacts are not new in the Oosterschelde but the large scale and short time in which these interventions are taking place are, as is the creation of a controlled tidal system. This article focusses on the area with reduced tide and compares resent day and expected characteristics. In this reduced tidal part salt marshes will extend by 30–70%; intertidal flats will erode to a lower level and at their edges, and the area of shallow water will increase by 47%. Biomass production on the intertidal flats will decrease, with consequences for crustaceans, fishes and birds. The maximum number of waders counted on one day and the number of ‘bird-days' will decrease drastically, with negative effects for the wader populations of western Europe. The net area with a hard substratum in the reduced tidal part has more than doubled. Channels will become shallower. Detritus import will not change significantly. Stratification and oxygen depletion will be rare and local. The operation of the storm-surge barrier and the closure strategy chosen are very important for the ecosystem. Two optional closure strategies can be followed without any additional environmental consequences. It was essential to determine a clearly defined plan of action for the whole area, and to make land-use choices from the outset. How this was done is briefly described.

Download Full-text

Environmental Engineering Techniques to Restore Degraded Posidonia oceanica Meadows

Water ◽

10.3390/w13050661 ◽

2021 ◽

Vol 13 (5) ◽

pp. 661

Author(s):

Luigi Piazzi ◽

Stefano Acunto ◽

Francesca Frau ◽

Fabrizio Atzori ◽

Maria Francesca Cinti ◽

...

Keyword(s):

Large Scale ◽

Natural Habitat ◽

Cost Benefit ◽

Cost Effective ◽

Posidonia Oceanica ◽

Environmental Engineering ◽

Bottom Surface ◽

Sessile Invertebrates ◽

Set Up ◽

Short Time

Seagrass planting techniques have shown to be an effective tool for restoring degraded meadows and ecosystem function. In the Mediterranean Sea, most restoration efforts have been addressed to the endemic seagrass Posidonia oceanica, but cost-benefit analyses have shown unpromising results. This study aimed at evaluating the effectiveness of environmental engineering techniques generally employed in terrestrial systems to restore the P. oceanica meadows: two different restoration efforts were considered, either exploring non-degradable mats or, for the first time, degradable mats. Both of them provided encouraging results, as the loss of transplanting plots was null or very low and the survival of cuttings stabilized to about 50%. Data collected are to be considered positive as the survived cuttings are enough to allow the future spread of the patches. The utilized techniques provided a cost-effective restoration tool likely affordable for large-scale projects, as the methods allowed to set up a wide bottom surface to restore in a relatively short time without any particular expensive device. Moreover, the mats, comparing with other anchoring methods, enhanced the colonization of other organisms such as macroalgae and sessile invertebrates, contributing to generate a natural habitat.

Download Full-text

Synthesis of Metal Organic Frameworks by Ball-Milling

Crystals ◽

10.3390/cryst11010015 ◽

2020 ◽

Vol 11 (1) ◽

pp. 15

Author(s):

Cheng-An Tao ◽

Jian-Fang Wang

Keyword(s):

Ball Milling ◽

Large Scale ◽

Raw Materials ◽

Metal Organic Frameworks ◽

Research Topic ◽

Mass Ratio ◽

Time Consumption ◽

Metal Organic ◽

Short Time ◽

Made In

Metal-organic frameworks (MOFs) have been used in adsorption, separation, catalysis, sensing, photo/electro/magnetics, and biomedical fields because of their unique periodic pore structure and excellent properties and have become a hot research topic in recent years. Ball milling is a method of small pollution, short time-consumption, and large-scale synthesis of MOFs. In recent years, many important advances have been made. In this paper, the influencing factors of MOFs synthesized by grinding were reviewed systematically from four aspects: auxiliary additives, metal sources, organic linkers, and reaction specific conditions (such as frequency, reaction time, and mass ratio of ball and raw materials). The prospect for the future development of the synthesis of MOFs by grinding was proposed.

Download Full-text

Metachronal waves in magnetic micro-robotic paddles for artificial cilia

Communications Materials ◽

10.1038/s43246-021-00120-7 ◽

2021 ◽

Vol 2 (1) ◽

Author(s):

Matthew T. Bryan ◽

Elizabeth L. Martin ◽

Aleksandra Pac ◽

Andrew D. Gilbert ◽

Feodor Y. Ogrin

Keyword(s):

Large Scale ◽

Point Of Care ◽

Hydrodynamic Response ◽

Flow Speeds ◽

Break Time ◽

Large Scale Manufacture ◽

Fresh Insight ◽

Metachronal Waves ◽

Insight Into ◽

Phase Differences

AbstractBiological cilia generate fluid movement within viscosity-dominated environments using beating motions that break time-reversal symmetry. This creates a metachronal wave, which enhances flow efficiency. Artificially mimicking this behaviour could improve microfluidic point-of-care devices, since viscosity-dominated fluid dynamics impede fluid flow and mixing of reagents, limiting potential for multiplexing diagnostic tests. However, current biomimicry schemes require either variation in the hydrodynamic response across a cilia array or a complex magnetic anisotropy configuration to synchronise the actuation sequence with the driving field. Here, we show that simple modifications to the structural design introduce phase differences between individual actuators, leading to the spontaneous formation of metachronal waves. This generates flow speeds of up to 16 μm/s as far as 675 μm above the actuator plane. By introducing metachronal waves through lithographic structuring, large scale manufacture becomes feasible. Additionally, by demonstrating that metachronal waves emerge from non-uniformity in internal structural mechanics, we offer fresh insight into the mechanics of cilia coordination.

Download Full-text

Improving the economic efficiency of oil productionat the “Gazpromneft-Khantos” fields

PROneft’ Proffessional’no o nefti ◽

10.51890/2587-7399-2021-6-3-136-143 ◽

2021 ◽

Vol 6 (3) ◽

pp. 136-143

Author(s):

Rustam N. Asmandiyarov ◽

Stanislav Yu. Barkalov ◽

Rail R. Galeev ◽

Rustam R. Gumerov ◽

Yuri A. Katkov ◽

...

Keyword(s):

Economic Efficiency ◽

Large Scale ◽

Oil Production ◽

Project Teams ◽

Factors Affecting ◽

Technical And Economic Analysis ◽

Production Technologies ◽

The Cross ◽

Functional Teams ◽

Short Time

Aim. As part of a large-scale business transformation, Gazprom Neft is implementing new approaches to improving economic efficiency. One of such approaches is the launch of the “Renovation” project program, the purpose of which is to achieve maximum profitability of the basic well stock. The article describes the results of the study and formation of a set of measures to improve the economic efficiency of oil production at the fields of Gazpromneft-Khantos. Materials and methods. The key feature of “Renovation” is that the goal setting and the formation of key performance indicators of project teams are made not from the previously achieved result, but from the potential. To do this, a detailed technical and economic analysis of the factors affecting the profitability of oil production is first carried out, and the potential for increasing profitability is determined. After that, hypotheses are worked out to increase the economic efficiency of production and a set of measures is formed to realize the identified potential. The cross-functional teams of the “Renovation” program projects are formed around the core-team that includes specialists in geology, development, production, engineering, energy management, economics and IT. This allows teams to solve non-standard tasks in a short time, in a complex way, without attracting external leverage, which is an absolute competitive advantage. Results. The program of optimization measures developed by the cross-functional team of the Renovation project will provide the potential for the growth of the profitability of Gazpromneft-Khantos in the period from 2021 to 2030. Conclusions. The article presents the developed and implemented cases on reducing operating costs in various areas — geology and reservoir engineering, energy efficiency, oil production technologies, downhole operations and hydraulic fracturing, oilfield chemistry.

Download Full-text

The Informal Use of Time as a Component of Multicultural Regional Identity in Transcarpathia (Ukraine)

East Central Europe ◽

10.30965/18763308-48010007 ◽

2021 ◽

Vol 48 (1) ◽

pp. 73-102

Author(s):

Csilla Fedinec ◽

István Csernicskó

Keyword(s):

Soviet Union ◽

Local Time ◽

Regional Identity ◽

Point Of View ◽

Sociological Research ◽

Time Zone ◽

Use Of Time ◽

The Soviet Union ◽

The Difference ◽

Short Time

Abstract Based on the data of sociological research, the analysis of the linguistic landscapes of Transcarpathian cities, and quotations from travel guides, this paper illustrates that in Transcarpathia, a significant part of the population—regardless of ethnicity—live their lives not according to the official Kyiv time (eet), but according to the local time (cet). The difference between official centralized time and “local time” appeared in Transcarpathia when the region became annexed to the Soviet Union. Yet before the Second World War, each state in the region used Central European time. The Soviet regime introduced msk, which was two hours ahead. The distinction between “local time” and central time has been maintained since Transcarpathia became part of the newly independent Ukraine. The population of the region has been urged to use a different time zone for a relatively short time from a historical point of view. The persistence of “local time” is also strengthened by the fact that it contributes to the image of Transcarpathia as a particular, specific region of Ukraine. “Local time” in Transcarpathia has become part of the region’s tourism brand.

Download Full-text

Contrasting tactical and strategic dynamics on a Clausewitz landscape

The Journal of Defense Modeling and Simulation Applications Methodology Technology ◽

10.1177/1548512919848068 ◽

2019 ◽

Vol 17 (2) ◽

pp. 143-153

Author(s):

Rodrick Wallace

Keyword(s):

Statistical Models ◽

Limit Theorems ◽

Large Scale ◽

Evolutionary Process ◽

Short Term ◽

Local Resources ◽

Human Organization ◽

The World ◽

Short Time

Statistical models based on the asymptotic limit theorems of control and information theories allow formal examination of the essential differences between short-time “tactical” confrontations and a long-term “strategic” conflict dominated by evolutionary process. The world of extended coevolutionary conflict is not the world of sequential “muddling through.” The existential strategic challenge is to take cognitive control of a long-term dynamic in which one may, in fact, be “losing” most short-term confrontations. Winning individual battles can be a relatively direct, if not simple or easy, matter of sufficient local resources, training, and resolve. Winning extended conflicts is not direct, and requires management of subtle coevolutionary phenomena subject to a dismaying punctuated equilibrium more familiar from evolutionary theory than military doctrine. Directed evolution has given us the agricultural base needed for large-scale human organization. Directed coevolution of the inevitable conflicts between the various segments of that organization may be needed for its long-term persistence.

Download Full-text

Micronesian Migration to Guam: Social and Economic Characteristics

Asian and Pacific Migration Journal ◽

10.1177/011719689200100208 ◽

1992 ◽

Vol 1 (2) ◽

pp. 350-385 ◽

Cited By ~ 8

Author(s):

Donald H. Rubinstein ◽

Michael J. Levin

Keyword(s):

Working Class ◽

Population Growth ◽

Ethnic Conflict ◽

Large Scale ◽

Social Costs ◽

Ethnic Communities ◽

Demographic Profile ◽

Provision Of Services ◽

Short Time

The recent lowering of some obstacles to the migration of Micronesians to Guam has resulted in a sudden influx of migrants. In a short time, Guam has experienced many of the impacts associated with large scale migration on population growth, provision of services and the issue of ethnic assimilation. An extensive demographic profile of newly settled migrants is presented, followed by a discussion of future implications. Micronesian migration is expected to grow, encouraging the formation of nucleated ethnic communities, a sizeable working class, and social costs and potential ethnic conflict that will draw increasing attention from the Guam government.

Download Full-text

Use of a Central Pattern Generator for Control of a Muscle-Actuated Simulation of Pedaling

ASME 2009 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2009-205653 ◽

2009 ◽

Author(s):

Martin Schultze ◽

Darryl G. Thelen

Keyword(s):

Central Pattern Generator ◽

Large Scale ◽

Pattern Generator ◽

Open Loop ◽

Dynamic Simulations ◽

Short Time ◽

Time Frames ◽

Large Scale Simulations ◽

Clinical Problems

Muscle actuated forward dynamic simulations have provided tremendous insights into the mechanics of locomotion. However, the controllers used for large scale simulations have often been open-loop, with the muscle excitations prescribed as a function of time [1]. Due to the inherently unstable nature of bipedal movement, this means that perturbation-type analyses are often limited to short time frames after the perturbation is introduced [2]. However for many clinical problems, it would be desirable to predict how periodic locomotion reestablishes following a change to the system or perturbation from the environment.

Download Full-text