Korea Institute of Science and Technology Information

About: Korea Institute of Science and Technology Information is a facility organization based out in Daejeon, South Korea. It is known for research contribution in the topics: Gravitational wave & LIGO. The organization has 1152 authors who have published 2319 publications receiving 93849 citations. The organization is also known as: Korea Institute of Science and Technology Information & KISTI.

A Reference Model for Virtual Machine Launching Overhead

Abstract: Cloud bursting is one of the key research topics in the cloud computing communities. A well designed cloud bursting module enables private clouds to automatically launch virtual machines (VMs) to public clouds when more resources are needed. One of the main challenges in developing a cloud bursting module is to decide when and where to launch a VM so that all resources are most effectively and efficiently utilized and the system performance is optimized. However, based on system operational data obtained from FermiCloud, a private cloud developed by the Fermi National Accelerator Laboratory for scientific workflows, the VM launching overhead is not a constant. It varies with physical resource utilization, such as CPU and I/O device utilizations, at the time when a VM is launched. Hence, to make judicious decisions as to when and where a VM should be launched, a VM launching overhead reference model is needed. In this paper, we first develop a VM launching overhead reference model based on operational data we have obtained on FermiCloud. Second, we apply the developed reference model on FermiCloud and compare calculated VM launching overhead values based on the model with measured overhead values on FermiCloud. Our empirical results on FermiCloud indicate that the developed reference model is accurate. We believe, with the guidance of the developed reference model, efficient resource allocation algorithms can be developed for cloud bursting process to minimize the operational cost and resource waste.

Search for gravitational waves associated with gamma-ray bursts detected by Fermi and Swift during the LIGO-Virgo Run O3a

Abstract: We search for gravitational-wave transients associated with gamma-ray bursts (GRBs) detected by the Fermi and Swift satellites during the first part of the third observing run of Advanced LIGO and Advanced Virgo (2019 April 1 15:00 UTC–2019 October 1 15:00 UTC). A total of 105 GRBs were analyzed using a search for generic gravitational-wave transients; 32 GRBs were analyzed with a search that specifically targets neutron star binary mergers as short GRB progenitors. We find no significant evidence for gravitational-wave signals associated with the GRBs that we followed up, nor for a population of unidentified subthreshold signals. We consider several source types and signal morphologies, and report for these lower bounds on the distance to each GRB.

EDISON: a web-based hpc simulation execution framework for large-scale scientific computing software

Abstract: Computational science and engineering (CSE) researchers usually develop their own technology computer-aided design (TCAD) programs, accompanying large-scale computation and I/O on high-performance computing (HPC) resources like clusters or supercomputers. The researchers typically use command-line interface (CLI) such as Terminal to access the HPC resources. But CLI may not be a useful tool to those who conduct research or get educated with the TCAD software, because of their unfamiliarity with executing a series of commands. Thus there has been a strong need on a platform that assists domain-specific scientists to easily share, access, and run TCAD services. To satisfy the need, in this poster we present a novel cyber-environment, called "Education-research Integration through Simulation On the Net" (EDISON), which has been designed and implemented to access and run various TCAD software tools developed in five selected CSE fields over the past four years. The EDISON platform comprises three layers: application portal to browse and run TCAD software, middleware to manage metadata associated with TCAD software and handle online simulation jobs, and infrastructure to support network, storage, and computing resources. In this demo a user will interact with the EDISON platform to perform two representative use-case scenarios: 1) browsing various TCAD tools, selecting one of the tools, controlling with its parameters, and running a simulation job from the tool, and 2) constructing a scientific workflow of selected TCAD tools and executing the workflow. At the end, the user will visualize the completed simulation results.