Sharif Digital Repository

Bread holds a significant place in the daily lives of Iranians, making the bread supply chain as one of the country's most vital product supply chain. The Iranian government has undertaken the responsibility of supplying the bread chain, and to achieve this, a specialized mother company was established. As a result, this company manages all aspects of this supply chain. Initially, the company's database and macro-policy objectives were examined to provide recommendations that align with its goals. One of the proposed suggestions was to optimize the extra-provincial transportation, which plays a crucial role in the supply chain. This proposal was chosen and thoroughly investigated. By... 

Significant growth in the amount of municipal solid waste generated around the world has turned this phenomenon into a potential crisis in the future. At the same time, applying the right management policies will turn municipal waste into a sustainable source of large-scale revenue generation. With the increasing importance of data in managers' decisions, valuable data have been generated in various fields. One of these data is characterization of municipal solid waste, which should be considered as the first step in determining the policies of an integrated municipal solid waste management system. This paper presents a mixed integer programming model based on two-commodity network flow... 

In recent years, in addition to the stock market, a market has been created in Iran under the name of commodity exchange market. In this market, the product supplier announces some product specifications and buyers also announce their demand and bid price. The following two situations may occur: 1. The total amount of demand is less than or equal to the amount of supply.In this case all buyers receive the product at their bid price. Obviously, first all buyers announce a price lower than the base price so that if this happens, they can buy the required product at the lowest possible price. 2. If the supply is less than the demand, the market enters the competition. In this way, the new bid... 

This research is focused on optimization of empty freight railcars circulation by assuming cooperation among shipping companies. The objectives are twofold: first, to develop an efficient and effective model which can provide a useful management tool to improve freight car utilization for shipping companies; second, to show the advantages of Horizontal Logistics Cooperation (HLC).Two formulations have been developed for the empty railcar distribution problem, both seeking to find how railcars move not only at the lowest possible cost but also at the lowest possible delays under supply limitation and demand satisfaction. The problem is first formulated as a single-commodity network flow model... 

This study investigates the effect of commodity price shock, including oil and base metals prices, on Tehran exchange and industries stock returns. These industries have the largest market share in Tehran exchange and may heavily depend on global prices. Using weekly data from 1387 to 1396, Multifactor and VAR models are performed to analyze the variance decomposition and impulse response function of each industry to 1% price shock. In addition to global prices, some macroeconomic factors that are likely to affect stock returns are considered. The results show that commodities price shocks have dynamic and significant effects on stock returns  

With the rise of the sharing economy, customers’ motivations to participate has become a controversial phenomenon. The sharing economy has different industries that might itself be a reason for the emergence of different incentives in customers. Moreover, these industries can affect motivation by controlling various touchpoints Two dimensions, quantity and quality illustrate the impact of touchpoints The encounter of touchpoints with both of the provider and consumer side might confuse companies to choose the best composition of has been conducted to identify the importance of motives to use different industries of the sharing economy and examine the impact of the brands’ touchpoints . In... 

Given the great importance and urgency of preventive operation against illegal drug trafficking as a social scourge, it is necessary to schedule and optimize the police decision in order to interdict further distribution of this harmful product. In this thesis, we study interdiction of drug distribution as multi-period maximum flow profit network interdiction on a multi-commodity flow and multi-source-sink network. The drug distribution network consists of criminal who are dynamically connected and seek to maximize the total flow profit from sources to sinks while the police aim to reduce aim to reduce total flow profit over long period of time by monitoring and interdicting criminals due to... 

The commodity market as a noteworthy section of the capital market plays a prominent role in the economy of a nation. Base metals, which are widely utilized as industrial raw materials, account for a part of the costs imposed on a nation’s economy. Hence the price levels and volatility of such metals have been under close observation by the capital markets and in the process of monetary policy. In this research we investigate the impacts of the monetary policy of the Federal Reserve on the return of base metals based on daily data and also on the stock return of the corporates which are associated with these metals by using intraday data. This poster employs Federal Funds Futures Contracts... 

In this research we study multi-commodity inventory-location problem under disruption risk that is formulated to a nonlinear integer-programming model. The objective function of this model is minimization of inventory and location costs simultaneously under disruption risk. These disruptions may be caused by natural events such as earthquake, flood, fire and man-made sources like labor strike or terrorist attack. The structural design of a supply chain greatly affects how these kinds of disruption risks influence the network. In this regard, this study proposes a strategy to reduce the impacts of disruption risk by considering substitute commodity in the multi-commodity inventory-location... 

Are the returns of the mineral companies in Tehran Stock Exchange affected by the changes in the commodity price at the Iran Mercantile Exchange? By implementing a Multi-Factor Model we will calculate the firms’ value elasticity to the commodity price changes. We try to explain the estimated elasticities on the basis of the firm’s fundamental variables using a discounted cash flow valuation model. An unbalanced panel data estimation is employed for this purpose. Afterwards, we will suggest a novel model on the ground of the assumption that the commodity prices and firm values follow the Geometric Brownian Motion. The result of the model is that the elasticity can be explained by commodity...