The Role of Quantitative Models in Building Scalable Cloud Infrastructures

Author(s):  
Joseph L. Hellerstein
Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2445 ◽  
Author(s):  
Rodrigo A. C. da Silva ◽  
Nelson L. S. da Fonseca

In the fog computing paradigm, fog nodes are placed on the network edge to meet end-user demands with low latency, providing the possibility of new applications. Although the role of the cloud remains unchanged, a new network infrastructure for fog nodes must be created. The design of such an infrastructure must consider user mobility, which causes variations in workload demand over time in different regions. Properly deciding on the location of fog nodes is important to reduce the costs associated with their deployment and maintenance. To meet these demands, this paper discusses the problem of locating fog nodes and proposes a solution which considers time-varying demands, with two classes of workload in terms of latency. The solution was modeled as a mixed-integer linear programming formulation with multiple criteria. An evaluation with real data showed that an improvement in end-user service can be obtained in conjunction with the minimization of the costs by deploying fewer servers in the infrastructure. Furthermore, results show that costs can be further reduced if a limited blocking of requests is tolerated.


2018 ◽  
Vol 227 (2) ◽  
pp. 219-228
Author(s):  
Assist.prof .Huda Abdel Kader Aziz ◽  
S.A Haifaa Abdel Kader Aziz

The  aim  of   this  research  is  to highlight  the importance of  quantitative  trends  and statistical  methods  in  geographies   because  of  Based  on   the   data   of   the    General Company  for  the manufacture of grain for the quantity of rice  production and the years of production and for the years (2009-2015),  it was  used to  find the estimated and  predictive value until 2020.Using two methods of analysis of comparative  costs  and assessing  the qualitative  factors determining the  optimal  location of the  company's silates  have been determined  The  best location is the Karbala silo in the first way, and the best location according to the method of assessing the factors was to Silo Hilla


2019 ◽  
Vol 20 (1) ◽  
pp. 44-46
Author(s):  
Wendy E. Cohen ◽  
Richard D. Marshall ◽  
Allison C. Yacker ◽  
Lance A. Zinman

Purpose To explain actions the US Securities and Exchange Commission (SEC) brought on August 27, 2018, against a group of affiliated investment advisers and broker-dealers for what the SEC considered misleading and insufficient representations and disclosures, insufficient compliance policies and procedures, and insufficient research and oversight concerning the use of faulty quantitative models to manage certain client accounts. Design/methodology/approach Explains the SEC’s findings concerning the advisers’ and broker-dealers’ failure to confirm that certain models worked as intended, to disclose the risks associated with the use of those models, to disclose the role of a research analyst in developing the models, to disclose the use of volatility overlays along with the associated risks, to determine whether a fund’s holdings were sufficient to support a consistent dividend payout without a return of capital, and to take sufficient steps to confirm the advertised performance of another investment manager whose products they were marketing. Provides insight into the SEC’s position and offers key takeaways. Findings These cases are significant for advisers who use quantitative models to implement their investment strategies in the management of client accounts and signal the SEC’s continued focus on investment advisers’ compliance with disclosure obligations to discretionary account investors. Practical implications Each manager should consider its own facts and circumstances, and should consult with counsel, in assessing how and to what extent to incorporate the SEC’s conclusions in crafting disclosure and other communications with investors on matters such as adequate representations, testing and validation of models, disclosure of errors, and verifying performance claims. Originality/value Practical guidance from experienced securities lawyers.


2018 ◽  
Vol 18 (1) ◽  
pp. 143
Author(s):  
Ahmad Soleh

The role of the sub plantation sector in developing the economy of the province of Jambi is no doubt already seen from the large number of residents who work and drape perekonomiannya in sub plantation sector. the data showed more than 60 percent of farmland in the province of Jambi is used as a plantation. The problem related goals of this research are (1) to analyze the development of the vast land, labor, and GRP sub plantation sector in the province of Jambi, (2) analyze contributions subplantation sector against the agricultural sector and GDP the province of Jambi, (3) analyze the effect of Extensive Land and labor against the Output of the Sub Sector Plantation Jambi province. The methods used in this research is descriptive qualitative and quantitative models by using regression Linear Regression and the contribution Multiplied by the method of OLS. The research results showed that (1) the development of land area, the workforce and GDP of sub sectors of the 2000-2015 period of Jambi province plantation continues to increase each year. (2) the variable land area and number of labor jointly or simultaneous affect GDP sub plantation sector province of Jambi. In the partial variable positive effect land area and significantly to GDP sub plantation sector province of Jambi. While labor has no effect significantly to GDP sub plantation sector province of Jambi.Keyword:P DRB, Estates, Labor, Land Area


Terra Nova ◽  
1995 ◽  
Vol 7 (1) ◽  
pp. 68-79 ◽  
Author(s):  
Olivier Bour ◽  
Ian Lerche ◽  
Dominique Grauls

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
C Villarreal

Palabras claves: Inversión extranjera directa, corporaciones transnacionales, globalizaciónResumen. El objetivo de esta obra es presentar una aproximación al estado actual del arte en el tema. En este sentido, se intentarán exponer los motivos que desencadenan que las diversas teorías relativas a la Inversión Extranjera Directa (IED) no proporcionen una respuesta unánime sobre la localización del capital extranjero con fines productivos, enfatizando la ausencia de modelos cuantitativos para explicar los factores en la decisión de invertir en el extranjero. Se presentan los conceptos y definiciones fundamentales relacionados con el tema. Finalmente, ofrece una perspectiva sobre el quehacer en las investigaciones relacionadas al tema.Key words: Foreign direct investment, transnational corporations, globalizationAbstract. The objective of this work is to present an approximation of the state of the art in the theme. For this purpose, I will try to illustrate the motives in order to unravel why the diverse theories of the Foreign Direct Investment (FDI) do not provide a unanimous response to the role of the foreign capital on productive end, emphasizing the absence of quantitative models to explain the factors that are essential in decision making of investing abroad. The concepts are presented and fundamental definitions related to the theme are pointed out. Finally, I offer a new perspective as how to conduct reasearch on this subject.


JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  

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