The Experts below are selected from a list of 2355 Experts worldwide ranked by ideXlab platform
Wilhelm Hasselbring - One of the best experts on this subject based on the ideXlab platform.
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Theodolite scalability benchmarking of distributed stream processing engines in microservice architectures
Big Data Research, 2021Co-Authors: Soren Henning, Wilhelm HasselbringAbstract:Abstract Distributed stream processing engines are designed with a focus on scalability to process big data volumes in a continuous manner. We present the Theodolite method for benchmarking the scalability of distributed stream processing engines. Core of this method is the definition of use cases that microservices implementing stream processing have to fulfill. For each use case, our method identifies relevant workload dimensions that might affect the scalability of a use case. We propose to design one benchmark per use case and relevant workload dimension. We present a general benchmarking framework, which can be applied to execute the individual benchmarks for a given use case and workload dimension. Our framework executes an implementation of the use case's dataflow architecture for different workloads of the given dimension and various numbers of processing instances. This way, it identifies how resources demand evolves with increasing workloads. Within the scope of this paper, we present 4 identified use cases, derived from processing Industrial Internet of Things data, and 7 corresponding workload dimensions. We provide implementations of 4 benchmarks with Kafka Streams and Apache Flink as well as an implementation of our benchmarking framework to execute scalability benchmarks in cloud environments. We use both for evaluating the Theodolite method and for benchmarking Kafka Streams' and Flink's scalability for different deployment options.
Soren Henning - One of the best experts on this subject based on the ideXlab platform.
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Theodolite scalability benchmarking of distributed stream processing engines in microservice architectures
Big Data Research, 2021Co-Authors: Soren Henning, Wilhelm HasselbringAbstract:Abstract Distributed stream processing engines are designed with a focus on scalability to process big data volumes in a continuous manner. We present the Theodolite method for benchmarking the scalability of distributed stream processing engines. Core of this method is the definition of use cases that microservices implementing stream processing have to fulfill. For each use case, our method identifies relevant workload dimensions that might affect the scalability of a use case. We propose to design one benchmark per use case and relevant workload dimension. We present a general benchmarking framework, which can be applied to execute the individual benchmarks for a given use case and workload dimension. Our framework executes an implementation of the use case's dataflow architecture for different workloads of the given dimension and various numbers of processing instances. This way, it identifies how resources demand evolves with increasing workloads. Within the scope of this paper, we present 4 identified use cases, derived from processing Industrial Internet of Things data, and 7 corresponding workload dimensions. We provide implementations of 4 benchmarks with Kafka Streams and Apache Flink as well as an implementation of our benchmarking framework to execute scalability benchmarks in cloud environments. We use both for evaluating the Theodolite method and for benchmarking Kafka Streams' and Flink's scalability for different deployment options.
Mulyani, Agnes Sri - One of the best experts on this subject based on the ideXlab platform.
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ANALISIS HASIL PENGUKURAN TINGGI TAKHIMETRI DENGAN SIPAT DATAR TELITI
'UKI Press', 2019Co-Authors: Mulyani, Agnes SriAbstract:This study is to analyze the accuracy of height measurements using the Waterpass and Kolida Theodolite DT 02. The location of the study was conducted in the Cawang Campus UKI area in November 2018.The method used is the measurement of the different height of polygon with a closed-loop by using Waterpass B2 and Kolida DT 02 Theodolite. Measurements are made three times with different loop, with the starting point and the end are the same point. The results showed that the calculation of the high closing error in rings 1, 2 and 3 with the Waterpass were 1 mm, 4 mm and 6 mm respectively. Whereas the high closing error with Theodolite Kolida DT 02 is12mm, 6mm, 19mm respectively. The Standard deviation of height difference with Waterpass is 1mm while with Theodolite 19mm. The conclusion that can be drawn is the Theodolite Kolida DT 02 can be used for high measurements in jobs that are not required to be very high accuracy. Keywords: Tachymetry; Levelling; Accurac
Mulyani Agnes - One of the best experts on this subject based on the ideXlab platform.
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ANALISIS HASIL PENGUKURAN TINGGI TAKHIMETRI DENGAN SIPAT DATAR TELITI
'UKI Press', 2020Co-Authors: Mulyani AgnesAbstract:This study is to analyze the accuracy of height measurements using the Waterpass as high measurement of height and Kolida Theodolite DT 02. The location of the study was conducted in the Cawang Campus UKI area in November 2018. The method used is the measurement of the different height of polygon with a closed-loop by using Waterpass B2 and Kolida DT 02 Theodolite by using Tachymetri. Measurements are made three times with different loop, with the starting point and the end are the same point. The results showed that the calculation of the high closing error in rings 1, 2 and 3 with the Waterpass were 1 mm, 4 mm and 6 mm respectively. Whereas the high closing error with Theodolite Kolida DT 02 is12mm, 6mm, 19mm respectively. The Standard deviation of height difference with Waterpass is 1mm while with Theodolite 19mm. The conclusion that can be drawn is the Theodolite Kolida DT 02 can be used for high measurements in jobs that are not required to be very high accuracy. Keywords : Tachymetri:high measurement;accuracy
Xiangyi Sun - One of the best experts on this subject based on the ideXlab platform.
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a universal and flexible Theodolite camera system for making accurate measurements over large volumes
Optics and Lasers in Engineering, 2012Co-Authors: Xiaohu Zhang, Zhaokun Zhu, Yun Yuan, Xiangyi SunAbstract:Abstract Typically, optical measurement systems can achieve high accuracy over a limited volume, or cover a large volume with low accuracy. In this paper, we propose a universal way of integrating a camera with a Theodolite to construct a Theodolite-camera (TC) measurement system that can make measurements over a large volume with high accuracy. The TC inherits the advantages of high flexibility and precision from Theodolite and camera, but it avoids the need to perform elaborate adjustments on the camera and Theodolite. The TC provides a universal and flexible approach to the camera-on-Theodolite system. We describe three types of TC based separately on: (i) a total station; (ii) a Theodolite; and (iii) a general rotation frame. We also propose three corresponding calibration methods for the different TCs. Experiments have been conducted to verify the measuring accuracy of each of the three types of TC.
