Case study questions and answers (module 2)

Teaching and learning styles are, by their very nature, changing and in recent years there has been a noticeable move from lecture-based activities towards more student-centred activities. Case studies are an increasingly popular form of teaching and have an important role in developing skills and knowledge in students.

Case study questions and answers (module 2)

About PSR PSR has been providing technology solutions and consulting services to natural gas and electric utilities since From its headquarters in Rio de Janeiro, Brazil, energy experts develop tools that help utility companies make crucial business decisions, enabling the companies to best position themselves in the highly competitive gas and electricity markets.

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The Challenge When cloud computing technology first emerged, PSR recognized that cloud computing was perfect for its products. We immediately started our AWS account and moved our services to the cloud. Based on scientific calculations of the hydrothermal resources of an energy system and other factors, SDDP introduces a time-coupling relationship between operation decisions and subsequent consequences.

PSR's products execute multiple optimization models that, for some customers' datasets, would require an unfeasible amount of time to run on a single server. For such cases, PSR's optimization methodology enables parallelization of the computation, employing a cluster of machines to provide execution of the job in reasonable time.

The usage of Amazon EC2 Cluster Compute Instances as the infrastructure for these jobs frees PSR from the need to build and maintain a high-performance datacenter facility.

Moreover, it allows the delivery of resources that had not previously been possible due to the large capital investment that would have been required to support periods of peak usage. It is up to this server to decide whether each job should proceed, and in which order, based on current EC2 instance usage and cost.

This module creates the EC2 instances, controls them, and terminates them after the completion of the processing.

Case study questions and answers (module 2)

In deploying its services to the cloud, PSR uses several modules: PSR's "FakeProcess" component handles interaction with the resources deployed in the AWS cloud, all in a manner that is completely transparent to the user interface and the client's locally-running application.

An interface allows applications to request the execution of models, download remote reports, check the status of case executions, and perform all other cloud-related services.

It uses three sub-modules for cloud-related tasks: Authorization Module - Authenticates each request and authorizes the user to proceed with the requested operation.

Queuing Module - Queues the authorized requests for asynchronous processing. Cloud Wrapping Module - Executes each service in the queue by allocating the resources needed for the computations.

The PSR architecture is depicted in the following diagram: Internal measurements have been taken and the expected power of the cloud was proven to be the right direction. As an example, a glance of AWS usage in October revealed over 44, processor hours were carried out, which would have required 76 days to be handled using the local available infrastructure under assumption of high availability.

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In one case, 1, processors were used in parallel, which would not be possible using the local infrastructure. Successfully achieving these requirements had previously been a balancing act, but AWS's cloud computing successfully addresses both requirements in the best possible way—there is plenty of capacity and PSR pays only for capacity used.

The company is presently exploring Amazon Elastic MapReduce as an option to generate reports more quickly. Since becoming the first company in Latin America to migrate to AWS, PSR has invested heavily in researching resources that multiply computation capabilities and in the development of cloud services for its clients.Module 3 Case Studies/Answers.

Disclaimer What questions will you ask regarding the overshoot? 3 ‐ Case Study 2 A patient is admitted with a temperature of °C The staff has been attempting to cool this .

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Module 04 Case Study: Bone Tissue Part I— “Marissa” Questions 1. Describe bone tissue and the role each component plays in bone physiology and remodeling.

case identification and year. respondent background variables. personal and family information. attitudinal measures - national problems. personal concerns.

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