M2 Tidal Current Estimation from One-day Observation Data off the Western and Southern Coasts of Korea

Hydrodynamical condition of Java sea as a part of Indian-Pacific throughflow system which is influenced by monsoon will affect the condition of Banten bay such tidal current. Bordered by Java sea makes Banten bay preoccupied with fisheries and shipping activities, so the information of current pattern e.g. tidal current is very necessary. This study aims to simulate the tidal current pattern using flow model fm as a numerical approach. Two-dimensional hydrodynamic model was employed to perform the simulation of tidal current. Model was validated by using current and tidal observation data which was taken on September 2015 and April 2016. The result shows that the current moved southwestern toward the land during high neap and high spring tidal conditions which ranged 0 – 0.142 m/s at the first transitional monsoon and 0-0.153 m/s at second transitional monsoon. During low spring tidal condition for both transitional monsoon, the current flowed northwestward on west side and northeastward on east side within the bay which ranged 0 – 0.137 m/s and 0 – 0.127 m/s respectively. The hydrodynamic conditions of Banten Bay are severe different between 2 transitional seasons, especially for the current speed and direction. It induces a different transport mechanism, resulting the unstable accretion and abrasion along Banten Bay coast.

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Performance Evaluation for a Lightning Location System Based on Observations of Artificially Triggered Lightning and Natural Lightning Flashes

Journal of Atmospheric and Oceanic Technology ◽

10.1175/jtech-d-12-00028.1 ◽

2012 ◽

Vol 29 (12) ◽

pp. 1835-1844 ◽

Cited By ~ 30

Author(s):

Luwen Chen ◽

Yijun Zhang ◽

Weitao Lu ◽

Dong Zheng ◽

Yang Zhang ◽

...

Keyword(s):

Performance Evaluation ◽

Detection Efficiency ◽

Arithmetic Mean ◽

Observation Data ◽

Location Error ◽

Location System ◽

Tall Structures ◽

Current Estimation ◽

Triggered Lightning ◽

Lightning Location System

Abstract Performance evaluation for the lightning location system (LLS) of the power grid in Guangdong Province, China, was conducted based on observation data of the triggered lightning flashes obtained in Conghua, Guangzhou, during 2007–11 and natural lightning flashes to tall structures obtained in Guangzhou during 2009–11. The results show that the flash detection efficiency and stroke detection efficiency were about 94% (58/62) and 60% (97/162), respectively. The arithmetic mean and median values for location error were estimated to be about 710 and 489 m, respectively, when more than two reporting sensors were involved in the location retrieval (based on 87 samples). After eliminating one obviously abnormal sample, the absolute percentage errors of peak current estimation were within 0.4%–42%, with arithmetic mean and median values of about 16.3% and 19.1%, respectively (based on 21 samples).

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Numerical Simulation of Tidal Current in the Coastal Region With an Artificial Seabed Mound for Upwelling

24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 2 ◽

10.1115/omae2005-67368 ◽

2005 ◽

Cited By ~ 8

Author(s):

Shigeru Tabeta ◽

Tsuguki Kinoshita ◽

Yuta Shimizu

Keyword(s):

Numerical Simulation ◽

Tidal Current ◽

Inverse Method ◽

Environmental Influence ◽

Coastal Region ◽

Tidal Wave ◽

Observation Data ◽

Computational Domain ◽

Wave Induced ◽

Upwelling Area

The technology of generating an artificial upwelling by constructing a seabed mound to increase the primary production is being examined off Ikitsuki Island, Nagasaki, Japan. A numerical simulation model is being developed in order to evaluate the effects and environmental influence of the artificial seabed mound. At the first stage of the modeling, tidal current is calculated for the coastal region including the artificial upwelling area. Since most of the boundaries of the computational domain are open to the ocean, it is necessary to give incoming tidal wave all over them, which is not easy because of complicate topography. A newly developed inverse method using the observation data at tidal stations along the coastline was applied to determine the boundary conditions of tide. The calculated tide by the method agreed fairly well with the observation data. Currents near the seabed mound was also investigated, whose result is indicated that internal wave induced by the mound makes the mixing larger.

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Characteristic of Tidal Currents in the Lombok Strait Using 3D FVCOM Numerical Model

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/925/1/012002 ◽

2021 ◽

Vol 925 (1) ◽

pp. 012002

Author(s):

I M D Raharja ◽

I M Radjawane ◽

I G Hendrawan

Keyword(s):

Tidal Current ◽

Three Dimensional ◽

Movement Pattern ◽

Ocean Model ◽

Ocean Current ◽

Coefficient Of Determination ◽

Open Boundary ◽

Observation Data ◽

Near Surface ◽

Current Circulation

Abstract The Lombok Strait located between Bali Island and Lombok Island, Indonesia. Lombok Strait is complex area because influence by Indonesian Throughflow and influence by Tidal Current. For this case want to research about tidal current circulation and simulated using a three-dimensional baroclinic hydrodynamic numerical modelling method by Finite Volume Coastal Ocean Model (FVCOM). The study was simulated during 1-year on 2004, February. The model just simulated by barotropic condition and only influence by elevation tide in open boundary. The verification of ocean current (u and v components) from the model compare with observation data has a high coefficient of determination, i.e., 0.9, respectively. This verification result shows good agreement between model and observation data. For the result model, in the Lombok strait dominant influence by M2 semidiurnal component from Indian Ocean and K1 diurnal component from Pacific Ocean. The current circulation in the near surface dominant movement pattern from southern to northern. On the other hand, for the vertical current in 100 – 600 meter is different with near surface. The current movement from northern to southern. In the sill area have upwelling phenomenon in the north side of the sill and downwelling in south of the sill.

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Socially Shared Regulation of Learning: A Review

European Psychologist ◽

10.1027/1016-9040/a000226 ◽

2015 ◽

Vol 20 (3) ◽

pp. 190-203 ◽

Cited By ~ 67

Author(s):

Ernesto Panadero ◽

Sanna Järvelä

Keyword(s):

Empirical Evidence ◽

Learning Theory ◽

Qualitative Data ◽

Social Regulation ◽

Observation Data ◽

Optimal Form ◽

Self Regulated Learning ◽

The Past ◽

Recorded Observation ◽

Socially Shared Regulation

Abstract. Socially shared regulation of learning (SSRL) has been recognized as a new and growing field in the framework of self-regulated learning theory in the past decade. In the present review, we examine the empirical evidence to support such a phenomenon. A total of 17 articles addressing SSRL were identified, 13 of which presented empirical evidence. Through a narrative review it could be concluded that there is enough data to maintain the existence of SSRL in comparison to other social regulation (e.g., co-regulation). It was found that most of the SSRL research has focused on characterizing phenomena through the use of mixed methods through qualitative data, mostly video-recorded observation data. Also, SSRL seems to contribute to students’ performance. Finally, the article discusses the need for the field to move forward, exploring the best conditions to promote SSRL, clarifying whether SSRL is always the optimal form of collaboration, and identifying more aspects of groups’ characteristics.

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Upaya meningkatkan hasil belajar IPA pada materi struktur dan fungsi jaringan tumbuhan melalui penerapan model pembelajaran mind mapping Siswa kelas VIII MTsN 2 Aceh Besar

Jurnal Pendidikan dan Pengabdian Vokasi (JP2V) ◽

10.32672/jp2v.v1i3.2294 ◽

2020 ◽

Vol 1 (3) ◽

pp. 299-306

Author(s):

Nurdahri Nurdahri

Keyword(s):

Learning Outcomes ◽

Learning Model ◽

Male Students ◽

Observation Data ◽

Mind Mapping ◽

Planning Cycle ◽

Class Viii ◽

And Function ◽

The Mind ◽

Academic Year

he purpose of this study was to improve science learning outcomes on the structure and function of plant networks in class VIII students of MTsN 2 Aceh Besar in the 2017/2018 academic year. The learning model used in this study is the Mind Mapping Learning Model. The subjects of this study were students of class VIII MTsN 2 Aceh Besar with a total of 33 students consisting of 13 male students and 20 fe-male students. This research was conducted in the 2017/2018 Academic Year within a period of 3 months, namely from August 2017 to October 2017 in Odd Semester. The research methodology is Classroom Action Research (CAR) consisting of two cycles and each cycle consisting of two meetings. Each cycle consists of planning, implementing, observing and reflecting. The research procedure con-sisted of pre-research, planning cycle one, implementing action cycle one, observing cycle one, reflect-ing cycle one, planning cycle two, implementing action cycle two, observing cycle two and reflecting cycle two. The data collection technique is to collect test scores that are carried out at the end of each lesson in each cycle using a question instrument (written test). Observation data was carried out by look-ing at the activeness of teachers and students during the learning process. The learning outcome data were analyzed by means of percentage statistics, while the observation data were analyzed by means of a Likert scale. The results showed that there was an increase in the completeness of student learning outcomes from 39.39% in the pre-cycle increased to 60.60% in Cycle I and increased to 87.87% in Cy-cle II. Observation of teacher activity during PBM has increased from a total score of 88 good categories in Cycle I, increasing to a total score of 93 good categories in Cycle II. The application of the Mind Mapping learning model can improve science learning outcomes on the structure and function of plant tissue for class VIII students of MTsN 2 Aceh Besar for the 2017/2018 academic year.

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Peningkatan Aktivitas Dan Hasil Belajar Bahasa Indonesia Pada Materi Teks Eksposisi Melalui Model Contextual Teaching And Learning (CTL) Siswa Kelas X IS 3 SMAN 4 Banda Aceh

Jurnal Pendidikan dan Pengabdian Vokasi (JP2V) ◽

10.32672/jp2v.v1i3.2293 ◽

2020 ◽

Vol 1 (3) ◽

pp. 289-298

Author(s):

Yuslina Yuslina

Keyword(s):

Language Learning ◽

Student Learning ◽

Teaching And Learning ◽

Learning Model ◽

Observation Data ◽

Process Data ◽

School Year ◽

Data Collection Technique ◽

Written Test ◽

Banda Aceh

he purpose of this study was to increase the activities and results of Indonesian language learning in the exposition text material of class X IS 3 SMAN 4 Banda Aceh. The learning model used in this study is the CTL learning model. The subjects of this study were students of class X IS 3 SMAN 4 Banda Aceh. The number of students is 35 students with 16 male students and 19 female students. This research was conducted in the 2019/2020 school year for a period of 3 months, from August 2019 to October 2019 in the odd semester. The research methodology is Classroom Action Research (PTK) consisting of two cy-cles and each cycle consisting of two meetings. Each cycle consists of planning, implementing, observ-ing and reflecting. The data collection technique is to collect test scores that are carried out at the end of each lesson in each cycle using a question instrument (written test). Observation data was carried out by looking at the activeness of students in the learning process. Data were analyzed by means of percentage statistics. The results showed that there was an increase in student learning activities in both cycles, from good enough to good categories and to very good categories. Completeness of student learning outcomes has increased from 48.57% in the pre cycle increased to 68.57% in cycle I and increased to 88.57% in cycle II. The use of the CTL learning model can increase the activities and results of Indone-sian language learning in the exposition text material of class X IS 3 SMAN 4 Banda Aceh Academic Year 2019/2020

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