A transshipment model for logistics management at Indian Oil Corporation

2020 ◽  
Vol 54 (4) ◽  
pp. 1087-1102
Author(s):  
Badri Toppur ◽  
Atanu Sanyal

Three refineries of the Indian Oil Corporation procure crude oil from suppliers, at production sites in the Persian Gulf, West Africa, North Africa, West Asia, and India. The crude oil is shipped to two ports in the state of Gujarat, India, by large tankers and medium sized vessels. From these two ports, the crude oil is pumped to the refineries via pipelines. The refineries have known capacity, that are different for the two types of crude oil. In this paper, the scaled-up problem has been modelled, as a transshipment network. Next, the concrete instance of the problem, has been solved using an LP solver. This was followed by post-optimality analysis of the solution. The flow values on all arcs, and optimal product mix, validate actual decisions. Precise shipping requirements obtained from the solution, are shared in advance with marine transporters to improve supply chain coordination.

1962 ◽  
Vol 5 (2) ◽  
pp. 122-148 ◽  
Author(s):  
R. J. Gavin

On 12 January 1873 the British yacht Enchantress entered the harbour of Zanzibar. On board were a former Governor of Bombay and a suite of six government officials—the Resident in the Persian Gulf, two men from the Foreign Office, a military and a naval attaché and one of the country's foremost Arabic scholars. What had brought such an important group into such an unimportant eastern backwater? The answer is only partly to be found in the state of British public opinion on the slave trade question. The origin of the mission is to be sought not in Exeter Hall but in the Huṣns on the bare slopes of the Jabal Akhḍar.


2010 ◽  
Vol 4 (2) ◽  
pp. 5-28 ◽  
Author(s):  
Behzad Hezarkhani ◽  
Wiesław Kubiak

Supply chain coordination through contracts has been a burgeoning area of re- search in recent years. In spite of rapid development of research, there are only a few structured analyses of assumptions, methods, and applicability of insights in this field. The aim of this paper is to provide a systematic overview of coordinating contracts in supply chain through highlighting the main concepts, assumptions, methods, and present the state-of-the- art research in this field.


2009 ◽  
Vol 5 (1) ◽  
pp. 603-606
Author(s):  
Yasaman Sanayei

Oil spills are a major menace to the environment because they severely damage the surrounding ecosystems. Persian Gulf in this century, Situating in the middle east, having more than 65 percent of world’s oil and gas resources, having huge biodiversity and existing rich resources of pearls and shells have made this location unique and valuable. Oil and gas field wastewater or produced water is a significant waste stream in the oil and gas industries. In this study, the performance of sequencing batch reactor (SBR) and sequencing batch reactor  process treating produced wastewater were investigated and compared. The SBR was operated in different hydraulic residence time (HRT) of 8, 20 and 44 h. Operation results showed that for a HRT of 20 h, the combined process effluent chemical oxygen demand (COD, oil removal efficiencies were 90.9 and 91.5 %, respectively .In this study, sequencing batch reactor(SBR) was used to treat synthetic and real produced water crude-oil-degrading Sphingomonas paucimobilis bacteria was isolated from oil-contaminated sites in the Persian Gulf and the Caspian Sea. Based on a high growth rate on crude oil and on hydrocarbon degradation ability. The combination of a SBR inoculated with a consortium of isolated halophilic microorganisms and a membrane filtration is an efficient, reliable, and compact process for organic matter produced water treatment without prior dilution.


2018 ◽  
Vol 56 (1) ◽  
pp. 63-86 ◽  
Author(s):  
Luca Raineri

AbstractIn recent years, Niger has gained prominence as a hub for the smuggling of migrants from West Africa to North Africa and Europe. Urged on by European concerns, Niamey has adopted repressive measures to contain such migrations in the region. These, however, have largely failed, and have yielded unintended and unexpected results, which challenge policy predictions. Drawing on extensive fieldwork, the article suggests that contradictory security imperatives have brought about the de facto regularisation of human smuggling. As a result, protection rackets sponsored by the state through patronage networks have severely limited the impact of externally sponsored measures to counteract irregular migration.


2020 ◽  
Vol 59 (10) ◽  
pp. 68-85
Author(s):  
Yaroslav Valentinovich Pilipchuk ◽  

This paper is dedicated to the history of Muslim statehood in Azerbaijan in IX-XIII century. The first truly strong was the Sajid dynasty, originating from the Sogdian aristocracy. Its representatives exalted themselves as ghouls in the service of the Abbasids. Having become rulers in Azerbaijan, the Sajids tried to pursue an independent and aggressive policy towards Armenia, which did not always provoke a positive reaction from the caliph. Only at the end of the Sajid rule did their interests again coincide with those of Baghdad. The Muzafarids were another Iranian dynasty, this time the Delemite. Its representatives came from Dalem during its expansion to the northwest. They took upon themselves the blows from Russia, the Ravadids and the Seljuks. The rabadids were a dynasty of Arab origin, which soon became Kurdish. Onomasticon of the dynasty in the 10th - 11th centuries generally Iranian. The era of the greatest power of the Rawwadids was the time of the reign of Mamlan I, who pursued an aggressive policy towards Christian neighbors and the threat from which the Armenians and Georgians neutralized by the conclusion of a defensive alliance. XI century was the time of the gradual fading of the Rawwadids. The Shaddadids were of Kurdish dynasty descent and ruled in Arran. Slow growth of their power was observed in the 10th century, when they began expansion in the possession of the Muzafarids. This dynasty is characterized by close ties with the Armenians. Emirs Fadl and Abu l-Asvar carried out an attack on the Armenian territories, which the Armenians could recapture only by cooperating with the Georgians. To destroy the emirate of the Shaddadids were not able and the Romaios in the middle of the XI century. Only the Seljuks in Arran were able to eliminate the power of the Shaddadids in 1093, and they survived in Shirak until 1199. Shirvan was a state inhabited by Iranian-speaking and Caucasian populations. The Mazyadid dynasty was originally Arab in origin. Shirvan maintained close ties with the state of Lizan. In the tenth century, the Shirvanshahs extended power besides Shirvan to Derbent and Arran. In the second quarter of the XI century. Mazyadids were replaced by the Qesranid dynasty, the onomasticon of which is already Iranian. This dynasty, unlike the Sheddadids in Arran and the Rawwadids in Azerbaijan, retained power in Shirvan under the Seljuks. The Caesranids, like the Mazyadids, continued to claim power over Derbent in the XII century. Shirvan became an object of expansion from Georgia. Shirvans could only resist it with the help of the Seljuks. However, this did not exclude dynastic marriages with Georgian Bagrationi. The most prominent Qesranid was the Shirvanshah Akhsitan, who, with the help of the Georgians, repelled the invasion of the Derbent Khazars and personally repelled the invasion of the Dagestan highlanders. In alliance with Queen Tamar, the Shirvanshah opposed the Atabeks of Azerbaijan. XIII century was the time of the decline of Shirvan, when he became the object of invasion of the Mongols, Kipchaks and Khorezmians. From 1070 Azerbaijan became the possession of the Seljukids, and from 1093 Arran became such. For several decades, Azerbaijan and Arran were the property of the younger Seljukids and were part of the Iraqi Seljuk Sultanate. The design of the state of the Atabeks of Azerbaijan can be dated to the middle of the XII century. Under its first rulers, Shams ad-Din Ildengiz and Jahan-Phelevane, the influence of the Ildengizids extended from the Caspian Sea to the Persian Gulf and from Erzurum to Khorasan. The Ildengizids were those who restrained the expansion of Georgian Bagrationi against Muslim countries and were actually omnipotent workers of the Sultans under the weak Seljukids. Qizil-Arslan has already ceased to look around at the Seljukids completely and has titled itself with a magnificent title. The end of the XII century. - beginning of the XIII century were the time of the decline of the Atabeks of Azerbaijan due to the strife between the Ildengizids and the victories of the Georgians. 20-30-ies of XIII century were the time of the fall of the Atabek state of Azerbaijan. Key words: Shirvan, Azerbaijan, Arran, Sajids, Mosaferids, Shaddadids, Rawwadids, Ildengizids, Seljukids


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