Discussion of “Operative Energy Concept in Marine Fendering”

1962 ◽  
Vol 88 (1) ◽  
pp. 159-160
Author(s):  
John Elliott George Palmer
Keyword(s):  
Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 122
Author(s):  
Catharina Latz ◽  
Thomas Asshauer ◽  
Christian Rathjen ◽  
Alireza Mirshahi

This article provides an overview of both established and innovative applications of femtosecond (fs)-laser-assisted surgical techniques in ophthalmology. Fs-laser technology is unique because it allows cutting tissue at very high precision inside the eye. Fs lasers are mainly used for surgery of the human cornea and lens. New areas of application in ophthalmology are on the horizon. The latest improvement is the high pulse frequency, low-energy concept; by enlarging the numerical aperture of the focusing optics, the pulse energy threshold for optical breakdown decreases, and cutting with practically no side effects is enabled.


Author(s):  
Akihiro Takezawa ◽  
Shinji Nishiwaki ◽  
Kazuhiro Izui ◽  
Masataka Yoshimura

This paper discuses a new topology optimization method using frame elements for the design of mechanical structures at the conceptual design phase. The optimal configurations are determined by maximizing multiple eigen-frequencies in order to obtain the most stable structures for dynamic problems. The optimization problem is formulated using frame elements having ellipsoidal cross-sections, as the simplest case. Construction of the optimization procedure is based on CONLIN and the complementary strain energy concept. Finally, several examples are presented to confirm that the proposed method is useful for the topology optimization method discussed here.


Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1915
Author(s):  
Heinz Bernhardt ◽  
Martin Höhendinger ◽  
Jörn Stumpenhausen

Regional energy supply is an important topic in the context of the energy transition in Germany. The “Cow Energy” project aims to combine the production of energy and milk for the farmer. In order to take the different needs into account, a central energy management system (EMS) is being established. This system records and simulates how much electricity is generated from renewable sources (biogas, solar, wind, etc.) on the farm. This is compared with the consumption of the barn technology (milking robot, feeding robot, etc.). This energy management is regulated according to the needs of the cows. In order to balance the fluctuations between energy production and energy consumption, the EMS regulates various battery systems. One goal is to network this energy system with the region and to establish regional energy networks.


2020 ◽  
Vol 10 (1) ◽  
pp. 1844
Author(s):  
Taufanny Putri Pratiwi ◽  
Munasir Munasir ◽  
Nadi Suprapto

A This study aims to analyze students’ science communication skills in the physics learning process especially in the Work and Energy concept using (Model-Observe-Reflect-Explain) MORE learning models. The research used a mixed method by utilizing test, questionnaires, and interviews with 10th and 11st grade students majoring in science, physics teachers and headmaster. The data was obtained by taking the physics scores of students in the work and energy concept who have received learning with the MORE learning model, then provides a questionnaire containing the obstacles faced by students in learning physics and interviews with students and teachers regarding learning constraints and science communication skills after learning using the MORE learning model. The findings indicated the MORE learning model helps students in practising science communication skills in learning with good student science communication skills will increase students’ understanding of Work and Energy concepts as seen from the students’ scores in the work and energy concept.  Keywords: science communication skill, MORE learning model, mixed methods, physics, cognitive ability                                                                                                                                                           Abstrak                                                                           Penelitian ini bertujuan untuk menganalisis keterampilan komunikasi sains siswa dalam proses pembelajaran fisika khususnya pada materi pembelajaran Usaha dan Energi dengan menggunakan model pembelajaran (Model-Observe-Reflect-Explain) MORE. Penelitian ini menggunakan mixed method dengan menggunakan tes, angket, dan wawancara yang diberikan pada siswa kelas 10 dan 11 jurusan IPA, guru-guru fisika dan kepala sekolah. Pengumpulan data dilakukan dengan cara mengambil nilai fisika siswa yang telah mendapatkan  pembelajaran pada materi Usaha dan Energi dengan model pembelajaran MORE, kemudian memberikan angket yang diisikan kendala-kendala yang dihadapi siswa selama proses pembelajaran fisika dan wawancara dengan siswa dan guru mengenai kendala-kendala selama proses pembelajaran untuk melatihkan keterampilan komunikasi sains dengan menggunakan model pembelajaran MORE. Hasil penelitian yang diperoleh, menunjukkan bahwa model pembelajaran MORE dapat membantu siswa dalam melatihkan keterampilan komunikasi sains dalam pembelajaran fisika. Meningkatnya keterampilan komunikasi sains siswa maka akan meningkatkan pula pemahaman siswa pada materi Usaha dan Energi yang terlihat dari nilai yang diperoleh siswa.  Kata Kunci: keterampilan komunikasi sains, model pembelajaran MORE, mixed methods, fisika, kemampuan kognitif 


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