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Journal articles on the topic 'Deteriorating'

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Author: Grafiati

Published: 31 May 2023

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1

Mishra, Vinod. "Controllable deterioration rate for time-dependent demand and time-varying holding cost." Yugoslav Journal of Operations Research 24, no. 1 (2014): 87–98. http://dx.doi.org/10.2298/yjor120823018m.

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In this paper, we develop an inventory model for non-instantaneous deteriorating items under the consideration of the facts: deterioration rate can be controlled by using the preservation technology (PT) during deteriorating period, and holding cost and demand rate both are linear function of time, which was treated as constant in most of the deteriorating inventory models. So in this paper, we developed a deterministic inventory model for non-instantaneous deteriorating items in which both demand rate and holding cost are a linear function of time, deterioration rate is constant, backlogging rate is variable and depend on the length of the next replenishment, shortages are allowed and partially backlogged. The model is solved analytically by minimizing the total cost of the inventory system. The model can be applied to optimizing the total inventory cost of non-instantaneous deteriorating items inventory for the business enterprises, where the preservation technology is used to control the deterioration rate, and demand & holding cost both are a linear function of time.

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2

Davidson, M. "Deteriorating/no deteriorating cognitive subtypes within schizophrenia." European Psychiatry 23 (April 2008): S50. http://dx.doi.org/10.1016/j.eurpsy.2008.01.183.

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3

Patel, Hetal, and Ajay Gor. "Salvage value and three variable Weibull deteriorating rate for non-instantaneous deteriorating items." Asian-European Journal of Mathematics 12, no. 05 (September 3, 2019): 1950070. http://dx.doi.org/10.1142/s1793557119500700.

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Existing study gives ordering policy for non-instantaneous deteriorating items having three-variable Weibull distribution deterioration rate. Demand rate varies in different time interval. Before deterioration starts, demand is constant and after that it decreases exponentially with respect to time. The study considers total cost function as objective function including salvage value. Shortages are not allowed to stay in time-based competition. Results are proved theoretically and numerically. Sensitivity analysis is performed with respect to salvage value, scale parameter, shape parameter and location parameter including in deterioration rate function to show the liability of the model.

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4

He, Yong, and Hongfu Huang. "Optimizing Inventory and Pricing Policy for Seasonal Deteriorating Products with Preservation Technology Investment." Journal of Industrial Engineering 2013 (April 4, 2013): 1–7. http://dx.doi.org/10.1155/2013/793568.

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The paper studies a kind of deteriorating seasonal product whose deterioration rate can be controlled by investing on the preservation efforts. In contrast to previous studies, the paper considers the seasonal and deteriorating properties simultaneously. A deteriorating inventory model is developed for this problem. We also provide a solution procedure to find the optimal decisions about the preservation technology investment, the market price, and the ordering frequency. Then a case study is used to illustrate the model and the solution procedure. Finally, sensitive analysis of the optimal solution with respect to major parameters is carried out.

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5

Sarbjit, Singh. "Analysis of Economic Order Quantity Model for Perishable Items Whose Deterioration Starts After Some Fixed Time." International Journal of Productivity Management and Assessment Technologies 2, no. 2 (July 2014): 1–11. http://dx.doi.org/10.4018/ijpmat.2014040101.

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This paper deals with an optimal replenishment policy for the items having deterministic demand and whose deterioration starts after some fixed time. In earlier studies, it had been assumed that the deterioration of items starts immediately after the procurement, but it's not necessary in most of the cases. For instance, food grains will not start deteriorating immediately after procurement; most of the industrial products also start deteriorating only after some fixed time. Thus, this study removes this unrealistic assumption and considers items whose deterioration starts after some fixed time. The impact of deterioration on cost and how it will impact cycle time has been illustrated in this study. Complete analysis of the proposed model has been done with both optimizing and numerical techniques.

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6

SHAH, NITA H. "PROBABILISTIC ORDER LEVEL SYSTEM WHEN ITEMS IN INVENTORY DETERIORATE AND DELAY IN PAYMENTS IS PERMISSIBLE." Asia-Pacific Journal of Operational Research 21, no. 03 (September 2004): 319–31. http://dx.doi.org/10.1142/s0217595904000266.

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An order level inventory model is developed for deteriorating items with a constant rate of deterioration and vendor offering delay in payments. The model is developed under probabilistic demand. It is shown that the model derived can be related to the existing model for non-deteriorating items and when delay in payments is not permissible. The model is supported by a probability distribution function.

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7

KROMMYDA, IRIS-PANDORA, KONSTANTINA SKOURI, IOANNIS KONSTANTARAS, and IOANNIS GANAS. "OPTIMAL PRICING AND REPLENISHMENT POLICY FOR NONINSTANTANEOUS DETERIORATING ITEMS AND TWO LEVELS OF STORAGE." Asia-Pacific Journal of Operational Research 30, no. 04 (August 2013): 1350001. http://dx.doi.org/10.1142/s0217595913500012.

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In this paper an inventory control system for deteriorating items with price and time-dependent demand is studied. The majority of the existing literature in inventory systems for deteriorating items, deals with items that are subject to deterioration as soon as they enter the warehouse. However, there are items that have a shelf-life and start deteriorating after a time lag (noninstantaneous deteriorating items). Under some special circumstances, i.e., attractive price discount, low storage cost, high demand, etc; the procurement of a large amount of such items at a time is decided. Because of the fixed capacity of the own warehouse (OW), a rented warehouse (RW) is used to store the excess quantity. In the present paper, a two-warehouse inventory model for noninstantaneous deteriorating items is developed. Shortages at OW are also allowed and partially backlogged at a rate, which is any nonincreasing function of the waiting time up to the next replenishment. For this model, we propose a simple solution procedure to determine the optimal pricing and replenishment schedule.

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8

Mondol, Manik, M. Forhad Uddin, and M. S. Hossain. "Estimation of inventory for deteriorating items with non-linear demand considering discount and without discount policy." Journal of Naval Architecture and Marine Engineering 13, no. 2 (December 29, 2016): 151–64. http://dx.doi.org/10.3329/jname.v13i2.23905.

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This paper develops an inventory model for deteriorating items consisting the ordering cost, unit cost, opportunity cost, deterioration cost and shortage cost. In this inventory model instead of linear demand function nonlinear exponential function of time for deteriorating items with deterioration rate has been considered. The effects of inflation and cash flow are also taken into account under a trade-credit policy of discount and without discount with time. In order to validate the model, numerical examples have been solved by bisection method deploying Matlab. Further, in order to estimate the cash flow the sensitivity of different parameters is considered.

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9

Reed, B. J., Helen F. Ladd, and John Yinger. "Deteriorating Urban America." Public Administration Review 49, no. 6 (November 1989): 570. http://dx.doi.org/10.2307/976584.

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10

Nair, Chandran. "Bangkok's deteriorating groundwater." Waterlines 9, no. 3 (January 1991): 21–23. http://dx.doi.org/10.3362/0262-8104.1991.006.

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11

Christensen, Hanne, Gudrun Boysen, Helle Hjorth Johannesen, Erik Christensen, and Klaus Bendtzen. "Deteriorating ischaemic stroke." Journal of the Neurological Sciences 201, no. 1-2 (September 2002): 1–7. http://dx.doi.org/10.1016/s0022-510x(02)00160-0.

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12

BOSSERT, WALTER, and YVES SPRUMONT. "Non-Deteriorating Choice." Economica 76, no. 302 (April 2009): 337–63. http://dx.doi.org/10.1111/j.1468-0335.2007.00671.x.

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13

Huang, Ming-Guan. "Economic ordering model for deteriorating items with random demand and deterioration." International Journal of Production Research 51, no. 18 (September 2013): 5612–24. http://dx.doi.org/10.1080/00207543.2013.791753.

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14

Nobil, Amir Hossein, Abolfazl Kazemi, and Ata Allah Taleizadeh. "Single-machine lot scheduling problem for deteriorating items with negative exponential deterioration rate." RAIRO - Operations Research 53, no. 4 (August 5, 2019): 1297–307. http://dx.doi.org/10.1051/ro/2018037.

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Determining production-inventory level is one of the most important and challenging problems in a manufacturing system.Economic Batch Quantity(EBQ) is the simplest and the most employed inventory model in this field. Here, a single-source production lot-sizing model for deteriorating products with negative exponential deterioration rate is developed. In this manufacturing system, we assume that all items are manufactured using a single source. In this paper the optimal values for cycle length and lot size are derived in a way that the total cost (consists of machine setup cost, manufacturing cost, carrying and disposal costs of the deteriorating items) is minimized. Consequently, the developed model for the proposed problem is formulated. According to the derived mathematical model, we could not provide a closed form optimal solution, but we show that there is a unique optimal solution for the cycle length. At first, the upper and lower bounds of the optimal solution are determined, then using a Bi-section method (root-finding method) the problem is solved. To demonstrate the applicability of this method, we solve a simple example for a manufacturing system with three products. Finally, results of ten experiment that obtain from this method compare to answers from Newton-Raphson method, then it has been shown that this method has great effectiveness and less calculation efforts for the single-machine problem with deteriorating items.

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15

Mondal, Manik, Mohammed Forhad Uddin, and Kazi Anowar Hussain. "Study of Inventory Model for Deteriorating Items With Exponential Demand Function." GANIT: Journal of Bangladesh Mathematical Society 34 (June 28, 2016): 89–100. http://dx.doi.org/10.3329/ganit.v34i0.28557.

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This paper develops an inventory model for deteriorating items consisting the ordering cost, unit cost, opportunity cost, deterioration cost and shortage cost. In this inventory model instead of linear demand function nonlinear exponential function of time for deteriorating items with deterioration rate has been considered. The formulated model has numerically solved by bisection method. The effects of inflation and cash flow are also taken into account under a trade-credit policy of discount with time. In order to validate the model, numerical examples have been solved by bisection method using Matlab. Further, the sensitivity of different parameters is considered in order to estimate the cash flow.GANIT J. Bangladesh Math. Soc.Vol. 34 (2014) 89-100

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16

Zhu, Zhanguo, Jinlin Li, and Chengbin Chu. "Multitasking Scheduling Problems with Deterioration Effect." Mathematical Problems in Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/4750791.

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Multitasking scheduling problems with a deterioration effect incurred by coexisting behavioral phenomena in human-related scheduling systems including deteriorating task processing times and deteriorating rate-modifying activity (DRMA) of human operators are addressed. Under the assumption of this problem, the processing of a selected task suffers from the joint effect of available but unfinished waiting tasks, the position-dependent deterioration of task processing time, and the DRMA of human operators. Traditionally, these issues have been considered separately; herein, we address their integration. We propose optimal algorithms to solve the problems to minimize makespan and the total absolute differences in completion time, respectively. Based on the analysis, some special cases and extensions are also discussed.

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17

Zhang, Xingong, Wen-Hsiang Wu, Win-Chin Lin, and Chin-Chia Wu. "Machine scheduling problems under deteriorating effects and deteriorating rate-modifying activities." Journal of the Operational Research Society 69, no. 3 (January 18, 2018): 439–48. http://dx.doi.org/10.1057/s41274-017-0200-0.

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18

CHUNG, KUN-JEN, and TIEN-SHOU HUANG. "THE OPTIMAL CYCLE TIME FOR DETERIORATING ITEMS WITH LIMITED STORAGE CAPACITY UNDER PERMISSIBLE DELAY IN PAYMENTS." Asia-Pacific Journal of Operational Research 23, no. 03 (September 2006): 347–70. http://dx.doi.org/10.1142/s0217595906000814.

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Inventory models with deteriorating items have received considerable attention in recent years. In considering the deteriorating inventory with permissible delay in payments, most researchers pay attention to a single warehouse. Under conditions of permissible delay in payments, this paper develops a model to determine the optimal cycle time for a single deteriorating item that is stored in two different warehouses. A rented warehouse (RW) is used to store the excess units over the fixed capacity W of the owned warehouse (OW). The rented warehouse is assumed to charge higher unit holding cost than the OW. In this paper, we propose a two-warehouse inventory model for deteriorating items under permissible delay in payments. It is assumed that the deterioration rate in RW is the same as in OW, and the holding cost in RW is greater than that in OW. The stocks of RW are transported to OW in continuous release pattern and the transportation cost is ignored. Three theorems are developed to determine the optimal cycle time and numerical examples are given to illustrate these theorems.

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19

Jones, D., J. Holmes, J. Currey, E. Fugaccia, A. J. Psirides, M. Y. Singh, G. J. Fennessy, et al. "Proceedings of the 12th International Conference on Rapid Response Systems and Medical Emergency Teams." Anaesthesia and Intensive Care 45, no. 4 (July 2017): 511–17. http://dx.doi.org/10.1177/0310057x1704500416.

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Rapid Response Teams (RRTs) have been introduced into hospitals worldwide in an effort to improve the outcomes of deteriorating hospitalised patients. Recently, there has been increased awareness of the need to develop systems other than RRTs for deteriorating patients. In May 2016, the 12th International Conference on Rapid Response Systems and Medical Emergency Teams was held in Melbourne. This represented a collaboration between the newly constituted International Society for Rapid Response Systems (iSRRS) and the Australian and New Zealand Intensive Care Society. The conference program included broad ranging presentations related to general clinical deterioration in the acute care setting, as well as deterioration in the emergency department, during pregnancy, in the paediatric setting, and deterioration in mental health status. This article briefly summarises the key features of the conference, links to presentations, and the 18 abstracts of the accepted free papers.

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20

Singh, Sarbjit. "Optimal Ordering Policy for Deteriorating Items Having Constant Demand and Deterioration Rate." Theoretical Economics Letters 07, no. 07 (2017): 2152–58. http://dx.doi.org/10.4236/tel.2017.77146.

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21

Pal, Manisha, and Anwesha Samanta. "Inventory model for non-instantaneous deteriorating item with random pre-deterioration period." International Journal of Inventory Research 5, no. 1 (2018): 3. http://dx.doi.org/10.1504/ijir.2018.092350.

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22

Pal, Manisha, and Anwesha Samanta. "Inventory model for non-instantaneous deteriorating item with random pre-deterioration period." International Journal of Inventory Research 5, no. 1 (2018): 3. http://dx.doi.org/10.1504/ijir.2018.10013395.

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23

Cui, Fengkun, Guangzhu Guan, Long Cui, Mian Li, Shuwen Deng, and Huihui Li. "Seismic Fragility Assessment of RC Columns Exposed to the Freeze-Thaw Damage." Buildings 13, no. 1 (January 3, 2023): 126. http://dx.doi.org/10.3390/buildings13010126.

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Freeze–thaw damage is one of the primary causes deteriorating the seismic resistance of reinforced concrete (RC) structures. This paper proposed a freeze–thaw damage deterioration model for C30 concrete, and it can be employed to study the time-varying seismic performance of aging RC columns. Next, this study developed a seismic fragility analysis framework for deteriorating RC columns considering the effect of freeze–thaw damage. Considering the geometric parameters of the case-study bridge, the deterioration characteristics of material, and the uncertainties involved in structural modeling and ground motions, a probabilistic seismic fragility analysis on aging RC columns was conducted. The results indicate that the influence of freeze–thaw damage cannot be ignored in studying the seismic performance of aging RC structures. The seismic fragilities of deteriorating RC columns shown a nonlinear increase trend as the increased of freeze–thaw cycles and severity of the damage state. In the early stage of freeze–thaw cycles, the seismic fragilities of RC columns increased slowly. However, the closer to the later stage of freeze–thaw cycles, the more significant of the increase in the seismic fragilities of the columns.

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24

Nian, Haiwei, and Zhizhong Mao. "Single-Machine Scheduling with Job Rejection, Deteriorating Effects, and Deteriorating Maintenance Activities." Mathematical Problems in Engineering 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/389120.

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This paper addresses the single-machine scheduling problems with simultaneous considerations of job rejection, deterioration effects, and deteriorating multimaintenance activities. A job is either rejected, in which case a rejection penalty has to be paid, or accepted and processed on the single machine. Three deterioration effect models are investigated, and it is assumed that each machine may be subject to several maintenance activities over the scheduling horizon, and the duration of the maintenance depends on its running time. Moreover, due to the restriction of the budget of maintenance, the upper bound of the total maintenance frequencies on the machine is assumed to be known in advance. The objective is to find jointly the optimal accepted job set, the optimal maintenance frequencies, the optimal maintenance positions, and the optimal accepted job sequence such that the cost function based on the total completion time and rejection penalty is minimized. It is shown that all the versions of the problem under study are polynomial time solutions.

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25

Yang, Ming-Feng, and Wei-Chung Tseng. "Deteriorating Inventory Model for Chilled Food." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/816876.

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With many aspects that affect inventory policy, product perishability is a critical aspect of inventory policy. Most goods will deteriorate during storage and their original value will decline or be lost. Therefore, deterioration should be taken into account in inventory practice. Chilled food products are very common consumer goods that are, in fact, perishable. If the chilled food quality declines over time customers are less likely to buy it. The value the chilled food retains is, however, closely dependent on its quality. From the vendor’s point of view, quantifying quality and remaining value should be a critical business issue. In consequence, we combined the traditional deterioration model and quality prediction model to develop a new deteriorating inventory model for chilled food products. This new model quantifies food quality and remaining value. The model we propose uses real deterioration rate data, and we regard deterioration rate as temperature-dependent. We provide a numerical example to illustrate the solution. Our model demonstrates that high storage temperatures reduce profits and force shorter order cycles.

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26

Tikuisis, Peter, and David R. Mandel. "Is the World Deteriorating?" Global Governance: A Review of Multilateralism and International Organizations 21, no. 1 (August 19, 2015): 9–14. http://dx.doi.org/10.1163/19426720-02101002.

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27

Peele, Roger. "Fragmented Responsibility, Deteriorating Care." Psychiatric Services 51, no. 5 (May 2000): 557. http://dx.doi.org/10.1176/appi.ps.51.5.557.

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28

Marsh, George. "Composites renovate deteriorating sewers." Reinforced Plastics 48, no. 6 (June 2004): 20–24. http://dx.doi.org/10.1016/s0034-3617(04)00338-8.

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29

Cheung, Raymond W. M., and Wilson H. Tang. "Reliability of Deteriorating Slopes." Journal of Geotechnical and Geoenvironmental Engineering 131, no. 5 (May 2005): 589–97. http://dx.doi.org/10.1061/(asce)1090-0241(2005)131:5(589).

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30

WEI, GUIYI, YONG QIU, and MIN JI. "SCHEDULING WITH POSITION-BASED DETERIORATING JOBS AND MULTIPLE DETERIORATING RATE-MODIFYING ACTIVITIES." Asia-Pacific Journal of Operational Research 31, no. 01 (February 2014): 1450009. http://dx.doi.org/10.1142/s0217595914500092.

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In a recent paper, Ozturkoglu and Bulfin (Ozturkoglu, Y. and RL Bulfin (2011). A unique integer mathematical model for scheduling deteriorating jobs with rate-modifying activities on a single machine. The International Journal of Advanced Manufacturing Technology, 57, 753–762.) formulate a unique integer program to solve the single-machine scheduling for the objectives of minimizing makespan and total completion time. They also propose efficient heuristic algorithms for solving large size problems. However their heuristics are not optimal and so the NP-hardness of the considered problem is still open. In this note, we show that a more general problem can be optimally solved in polynomial time. We also provide optimal polynomial-time solution algorithm for the parallel-machine case to minimize total completion time.

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31

WANG, JI-BO, and MING-ZHENG WANG. "MAKESPAN MINIMIZATION ON THREE-MACHINE FLOW SHOP WITH DETERIORATING JOBS." Asia-Pacific Journal of Operational Research 30, no. 06 (December 2013): 1350022. http://dx.doi.org/10.1142/s021759591350022x.

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In this study, we consider a permutation flow shop scheduling problem on a three-machine with deteriorating jobs (a deteriorating job means that the job's processing time is an increasing function of its starting time) so as to minimize the makespan. We model job deterioration as a function that is proportional to a linear function of time. For some special cases, we prove that the problem can be solved in polynomial time. We develop branch-and-bound and heuristic procedures for the general case. Computational experiments for the branch-and-bound algorithm and heuristic algorithm are presented.

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32

Li, Junxiang, Jianqiao Chen, and Zhiqiang Chen. "A new cumulative damage model for time-dependent reliability analysis of deteriorating structures." Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability 234, no. 2 (November 20, 2019): 290–302. http://dx.doi.org/10.1177/1748006x19886157.

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Performance and reliability of structures will deteriorate with the effects of loads, environment, and interior factors of materials. In this article, a novel cumulative damage model is developed for time-dependent reliability analysis of deteriorating structures. The deterioration is a combination of three stochastic processes: the gradual deterioration posed by aging effects, the sudden deterioration caused by transient loads, and the additional deterioration introduced by sustained loads. The aging effect is modeled as a gamma process, while the transient load is described by a Poisson process. The sustained load is modeled by a stationary binomial process and a Poisson square wave process, respectively. The load threshold for three different scenarios are all considered and applied to not only the transient loads but also the sustained loads. The time-dependent reliability of deteriorating structures is then evaluated based on this model via semi-analytical methods or numerical simulation methods. Three numerical examples and an example involving a natural gas pipeline are used to validate the effectiveness of the proposed model for computing the time-dependent reliability.

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33

Li, N., Felix T. S. Chan, S. H. Chung, and Allen H. Tai. "An EPQ Model for Deteriorating Production System and Items with Rework." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/957970.

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This paper investigates the economic production quantity model jointly considering product deterioration and a deteriorating production system with rework. In this imperfect deteriorating production system, not only does the machine produce defective product but also the machine is subjected to quality deterioration. To be more specific, the defective rate increases at certain time intervals. The defects produced are stored until the end of normal production process. Then they are reworked with extra cost to restore their quality and regarded as perfect product. The main objective is to minimize the total cost per unit product by determining the optimal combination of production run time and backlog quantity. Numerical experiments are carried out to illustrate the behavior of the inventory and show the impact of different parameters on the model. Discussion and conclusions are made at the end of the paper.

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Naserabadi, Bahar, Abolfazl Mirzazadeh, and Sara Nodoust. "A New Mathematical Inventory Model with Stochastic and Fuzzy Deterioration Rate under Inflation." Chinese Journal of Engineering 2014 (August 14, 2014): 1–10. http://dx.doi.org/10.1155/2014/347857.

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This paper develops an inventory model for items with uncertain deterioration rate, time-dependent demand rate with nonincreasing function, and allowable shortage under fuzzy inflationary situation. The goods are not deteriorating upon reception, but the deteriorating starts after elapsing a specified time. The lead time and inflation rate are both uncertain in the model. The resultant effect of inflation and time value of money is assumed to be fuzzy in nature and also we consider lead time as a fuzzy function of order quantity. Furthermore the following different deterioration rates have been considered: for the first case we consider fuzzy deterioration rate and for the second case we assume that the deterioration rate is time dependent and follows Weibull distribution with three known parameters. Since the inflation rate, deterioration rate, and the lead time are fuzzy numbers, the objective function becomes fuzzy. Therefore the estimate of total costs for each case is derived using signed distance technique for defuzzification. The optimal replenishment policy for the model is to minimize the total present value of inventory system costs, derived for both the above mentioned policies. Numerical examples are then presented to illustrate how the proposed model is applied.

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35

Priyan, S., and P. Mala. "Multi-echelon Supply Chain Model for Deteriorating Products in a Fuzzy Deterioration Environment." Fuzzy Information and Engineering 11, no. 1 (January 2, 2019): 86–104. http://dx.doi.org/10.1080/16168658.2021.1886814.

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36

Rangarajan, K., and K. Karthikeyan. "EOQ Model for Non-Instantaneous Deteriorating Items with Cubic Deterioration and Cubic Demand." Asian Journal of Research in Social Sciences and Humanities 6, no. 9 (2016): 2099. http://dx.doi.org/10.5958/2249-7315.2016.00931.x.

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37

Singh, Trailokyanath, Hadibandhu Pattanayak, Ameeya Kumar Nayak, and Nirakar Niranjan Sethy. "An Optimal Policy with Three-Parameter Weibull Distribution Deterioration, Quadratic Demand, and Salvage Value Under Partial Backlogging." International Journal of Rough Sets and Data Analysis 5, no. 1 (January 2018): 79–98. http://dx.doi.org/10.4018/ijrsda.2018010106.

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This paper deals with an EOQ (Economic Order Quantity) model for deteriorating items having the following characteristics: 1) Deteriorating items follow a three-parameter Weibull distribution deterioration rate; 2) Shortages are allowed and are partially backlogged; 3) Salvage value of items is incorporated; 4) Demand is deterministic and a time-dependent quadratic function of time. The principal objective of the introduced model is to minimize the average total inventory cost by finding an optimal replenishment policy. The effectiveness of the model is validated with a numerical example and the sensitivity analysis of the optimal solutions to changes in the values of the various parameters associated with the model has been performed.

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38

Agustiansyah, Agustiansyah, P. B. Timotiwu, E. Pramono, and M. Maryeta. "Effect of Priming on Vigor of Germinated Chili (Capsicum annum L.) Seeds in Aluminium Stress Conditions." Jurnal Penelitian Pertanian Terapan 21, no. 3 (December 31, 2021): 204–11. http://dx.doi.org/10.25181/jppt.v21i3.2133.

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Seed germination in ultisol is a problem. Ultisol has a low pH, poor in nutrients and organic matter, and high Al content. The low physiological quality of seeds is also a limiting factor. The purpose of this study was to determine the effect of priming on the seed vigor of two chili varieties whose seeds have expired and have not expired. This experiment consisted of 2 experiments, namely Experiment 1, which used seeds that had expired (deteriorating), and Experiment II, which used seeds that had not expired (non-deteriorating). This study was structured using a completely randomized design (CRD) which was repeated three times. This experiment is factorial. The first factor is priming, consisting of five levels: control, immersion in water, 30% PEG, 50 ppm GA3, and 1% KNO3. At the same time, the second factor in the first experiment was the seeds of the Tanjung 2 and Kencana varieties that had expired (deteriorating). In the second experiment, the second factor was the seeds of the Tanjung 2 and Kencana varieties that had not expired (non-deteriorating). The data obtained were analyzed using the R statistic program with a 5% HSD test. The results showed that priming with 50 ppm GA3 and 1% KNO3 increased the vigor of seeds that had expired (deteriorating). Meanwhile, priming with water and 1% KNO3 increased the vigor of seeds that had not yet expired (deterioration). The Kencana variety has a higher vigor than the Tanjung 2 variety on expired seeds. In seeds that have not yet expired, both varieties have the same good vigor.

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Ashrafi, Seyed Ali, Andrew W. Smyth, and Raimondo Betti. "A parametric identification scheme for non-deteriorating and deteriorating non-linear hysteretic behaviour." Structural Control and Health Monitoring 13, no. 1 (January 2006): 108–31. http://dx.doi.org/10.1002/stc.142.

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Huang, Yiwei, Xiaoyun Sun, Yinping Yao, Yejun Chen, Yan Chen, and Yuping He. "Compressed Sensing Algorithm-Based Magnetic Resonance Imaging Guided for Prognosis of Early Neurological Deterioration after Intravenous Thrombolysis in Ischemic Stroke Patients." Scientific Programming 2021 (July 6, 2021): 1–6. http://dx.doi.org/10.1155/2021/9568856.

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This work was aimed to study the risk factors and prognostic treatment for acute ischemic stroke (AIS) patients with early neurological deterioration (END) after intravenous thrombolytic therapy via compressed sensing algorithm-based magnetic resonance imaging (CS-MRI). 231 patients who were diagnosed with AIS were selected, and the final involved number of patients was 182. Patients with AIS were treated with intravenous thrombolysis with alteplase within 4.5 hours of onset. After treatment, patients with early neurological deterioration were defined as the deteriorating group and those without early neurological impairment were defined as the nondeteriorating group. In univariate analysis, hypertension, white blood cell count, and National Institutes of Health Stroke Scale (NIHSS) score were correlated with the occurrence of END. Under the CS-MRI theory, the two groups of patients were evaluated for middle cerebral artery basal ganglia infarction and internal watershed infarction. After univariate analysis, the P < 0.1 variables were taken as the independent variable, and the binary logistic regression model was adopted for multivariate regression analysis. It was disclosed that NIHSS score was not correlated with the occurrence of early neurological function deterioration, while homocysteine was. Hypertension, white blood cell count, homocysteine, and NIHSS score were risk factors for END. The image analysis revealed that the incidence of deteriorating basal ganglia infarction group was lower relative to the nondeteriorating group, and the incidence of watershed infarction was higher in the deteriorating group versus the nondeteriorating group. The image analysis suggested that predicting the occurrence of END through risk factors can actively provide endovascular treatment for patients with AIS.

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Detailleur, Stephanie, Robin Vos, and Pieter Goeminne. "The Deteriorating Patient: Therapies Including Lung Transplantation." Seminars in Respiratory and Critical Care Medicine 42, no. 04 (July 14, 2021): 623–38. http://dx.doi.org/10.1055/s-0041-1730946.

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AbstractIn this review paper, we discuss the characteristics that define severe bronchiectasis and which may lead to deterioration of noncystic fibrosis bronchiectasis. These characteristics were used to establish the current severity scores: bronchiectasis severity index (BSI), FACED, and E-FACED (exacerbation frequency, forced expiratory volume in 1 second, age, colonization, extension and dyspnea score). They can be used to predict mortality, exacerbation rate, hospital admission, and quality of life. Furthermore, there are different treatable traits that contribute to severe bronchiectasis and clinical deterioration. When present, they can be a target of the treatment to stabilize bronchiectasis.One of the first steps in treatment management of bronchiectasis is evaluation of compliance to already prescribed therapy. Several factors can contribute to treatment adherence, but to date no real interventions have been published to ameliorate this phenomenon. In the second step, treatment in deteriorating patients with bronchiectasis should be guided by the predominant symptoms, for example, cough, sputum, difficulty expectoration, exacerbation rate, or physical impairment. In the third step, we evaluate treatable traits that could influence disease severity in the deteriorating patient. Finally, in patients who are difficult to treat despite maximum medical treatment, eligibility for surgery (when disease is localized), should be considered. In case of end-stage disease, the evaluation for lung transplantation should be performed. Noninvasive ventilation can serve as a bridge to lung transplantation in patients with respiratory failure.

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WU, CHIN-CHIA, WEN-CHIUNG LEE, and YAU-REN SHIAU. "A SINGLE-MACHINE DETERIORATING JOB SCHEDULING PROBLEM WITH A NON-REGULAR CRITERION." Asia-Pacific Journal of Operational Research 28, no. 03 (June 2011): 349–59. http://dx.doi.org/10.1142/s0217595911003272.

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In scheduling environments with deterioration, a job processed later consumes more time than that same job when processed earlier. The deteriorating job scheduling problems have been widely studied in the last two decades. However, no result of the completion time variance has been reported. In this study, we consider the variance of job completion time minimization problem on a single machine. It is assumed that the job processing time is a simple linear function of its starting time. We show that an optimal schedule is V-shaped with respect to the job deteriorating rates. A heuristic algorithm utilized the V-shaped property is then proposed, and a computational experiment shows that the proposed heuristic algorithm is quite accurate.

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Virgin, Lawrence N. "Dynamic Characteristics of Deteriorating Engineering Structures." Applied Mechanics Reviews 46, no. 5 (May 1, 1993): 220–26. http://dx.doi.org/10.1115/1.3120341.

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The monitoring of energy production and distribution systems with a view to predicting their future performance and service life is a difficult but increasingly important exercise. Specific interest here concerns the behavior of aging offshore oil and gas structures. The maintenance and safety of these systems is a major challenge considering their generally deteriorating nature and harsh operating environment. The dynamic response of a structural component or structure can be used to assess properties such as mass, stiffness and damping. If periodic assessment is conducted then any changes, specifically deterioration, during the lifetime of a structure can be monitored using vibration measurement methods. This information can then be used to predict the useful life of the structure given a constant rate of deterioration or provide the basis for remedial action to be taken to strengthen the structure. The prevention of catastrophic failure is included in this scenario. Suggestions for possible research directions are made with regard to nonlinear behavior.

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Tripathi, R. P., and M. K. Gupta. "A COMPARATIVE STUDY OF PURCHASING EOQ (ECONOMIC ORDER QUANTITY) MODELS FOR NON-DETERIORATION AND DETERIORATING ITEMS UNDER STOCK-LINKED AND EXPONENTIAL DEMAND." jnanabha 50, no. 02 (2020): 244–53. http://dx.doi.org/10.58250/jnanabha.2020.50229.

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Demand plays an important role for smooth running of any type of business. Most of the inventory modelers considered steady demand rate in their models. While in actual practice demand rate is in fluctuating state. In this study, a purchasing EOQ models for non-deteriorating and deteriorating items with stock-linked and exponential demand is considered. Three models are measured. In Model I, a purchasing EOQ model for non-deteriorating item with stock-dependent demand is assumed. In the second model an EOQ model for deteriorating item with stock-sensitive demand is considered. In the third model an EOQ model for decay item with exponential demand is considered. The mathematical models are established of all these three cases. Optimality conditions are also taken in account. Numerical examples and sensitivity analysis is also conversed. Taylor’s series approximation is used for finding numerical results.

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Li, Wenhua, Libo Wang, Xing Chai, and Hang Yuan. "Online Batch Scheduling of Simple Linear Deteriorating Jobs with Incompatible Families." Mathematics 8, no. 2 (February 1, 2020): 170. http://dx.doi.org/10.3390/math8020170.

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We considered the online scheduling problem of simple linear deteriorating job families on m parallel batch machines to minimize the makespan, where the batch capacity is unbounded. In this paper, simple linear deteriorating jobs mean that the actual processing time p j of job J j is assumed to be a linear function of its starting time s j , i.e., p j = α j s j , where α j > 0 is the deterioration rate. Job families mean that one job must belong to some job family, and jobs of different families cannot be processed in the same batch. When m = 1 , we provide the best possible online algorithm with the competitive ratio of ( 1 + α max ) f , where f is the number of job families and α max is the maximum deterioration rate of all jobs. When m ≥ 1 and m = f , we provide the best possible online algorithm with the competitive ratio of 1 + α max .

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Barker, Mike, Melanie Rushton, and Joyce Smith. "How to assess deteriorating patients." Nursing Standard 30, no. 11 (November 11, 2015): 34–36. http://dx.doi.org/10.7748/ns.30.11.34.s44.

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Dang, Tran Khanh, and Tuan Anh Truong. "Anonymizing but Deteriorating Location Databases." Polibits 46 (December 31, 2012): 73–81. http://dx.doi.org/10.17562/pb-46-9.

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Feinerman, James V. "Deteriorating Human Rights in China." Current History 89, no. 548 (September 1, 1990): 265–69. http://dx.doi.org/10.1525/curh.1990.89.548.265.

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Chou, S. M., and L. Gutmann. "Deteriorating parkinsonism and subdural hematomas." Neurology 57, no. 7 (October 9, 2001): 1295. http://dx.doi.org/10.1212/wnl.57.7.1295.

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Onuma, Teiichi. "Deteriorating Epilepsies: Severely Deteriorated Cases." Psychiatry and Clinical Neurosciences 44, no. 2 (June 1990): 283–88. http://dx.doi.org/10.1111/j.1440-1819.1990.tb01407.x.

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