Concept Design of 15m class Light Weight Deployable Antenna Reflector for L-band SAR Application

2016 ◽  
Author(s):  
Kazuyuki Nakamura ◽  
Nobuko Nakamura ◽  
Satoru Ozawa ◽  
Akihisa Uematsu ◽  
Hirokazu Hoshino ◽  
...  
Keyword(s):  
Light Weight ◽  
Concept Design ◽  
L Band ◽  
Antenna Reflector

Initial Results of an Airborne Light-Weight L-Band Radiometer

2008 ◽  
Author(s):  
E. Valencia ◽  
R. Acevo ◽  
X. Bosch-Lluis ◽  
A. Aguasca ◽  
N. Rodriiguez-Alvarez ◽  
...  
Keyword(s):  
Light Weight ◽  
L Band ◽  
Initial Results ◽  
Band Radiometer

scholarly journals DESAIN AWAL SISTEM SATELIT TELEKOMUNIKASI PERTAHANAN INDONESIA (PRELIMINARY DESIGN OF INDONESIAN MILITARY TELECOMUNICATION SATELLITE)

2017 ◽  
Vol 14 (2) ◽  
pp. 113
Author(s):  
Robertus Heru Triharjanto ◽  
Luqman Faturrohim ◽  
Ridanto Eko Poetro ◽  
Hari Muhammad
Keyword(s):  
Mobile Communications ◽  
Data Communication ◽  
Satellite System ◽  
Preliminary Design ◽  
Concept Design ◽  
Power Capacity ◽  
Satellite Mission ◽  
Design Constraints ◽  
Telecommunication Satellite ◽  
L Band

As the biggest archipelago in the world, Indonesia really needs satellite system to support its defense and security. Based on that, this research aims to produce the preliminary design of telecommunication satellite system needed for defense and security campaign in Indonesia. Per best practice in aerospace engineering, the satellite preliminary design is preceded by a satellite concept design. In the concept design process, the users’ requirements, in this case, the Indonesian military, are studied, and comparative study is done for military telecommunication satellite solution that other countries used. The results are the satellite mission requirements, and design constraints to be used in the satellite preliminary design. The preliminary design shows that 2 kinds of satellites are needed to accommodate the mission requirements. i.e. L-band for mobile communications and C-band for fixed-high-datarate communication. Based on the available slots and the design constraints, the L-band satellite will be placed at 123 E. The satellite will weigh 2200 kg, has a power capacity of 1 kW, and can provide data communication with the speed of 512 kbps. The C-band satellite, that will be placed at 118 E, will weigh 2400 kg, has power capacity of 1.5 kW, and can provide data communication with the speed of 10 Mbps. Both satellites can operate for 10 years. Abstrak:Indonesia sebagai negara kepulauan terluas di dunia amat memerlukan sistem satelit untuk menunjang sistem pertahanan dan keamanannya. Atas motivasi tersebut penelitian ini bertujuan untuk membuat desain awal sistem satelit telekomunikasi yang diperlukan untuk pertahanan dan keamanan di Indonesia. Sesuai kaidah perancangan satelit, proses desain awal didahului dengan pembuatan desain konsep. Pada proses desain konsep dilakukan pendefinisikan kebutuhan penggguna, dalam hal ini pihak TNI dan Kementerian Pertahanan, dan studi banding atas solusi satelit telekomunikasi pertahanan di mancanegara. Hasil desain konsep adalah persyaratan misi dan batasan desain, yang harus diacu pada tahap desain awal satelit. Desain awal, diantaranya, menetapkan desain muatan sehingga dapat mengakomodasikan misi, serta ukuran dan berat dari bus satelit, agar bisa memenuhi kebutuhan muatan. Hasil menunjukkan bahwa pemenuhan desain konsep hanya bisa dilakukan dengan desain awal 2 tipe satelit telekomunikasi, yakni dengan frekuensi L-band untuk komunikasi bergerak, dan frekuensi C-band untuk komunikasi statis dengan kecepatan tinggi. Sesuai ketersediaan slot yang menjadi batasan desain, satelit L-band akan ditempatkan di 123 BT. Satelit tersebut mempunyai berat 2200 kg, konsumsi daya 1 kW, dan dapat melayani komunikasi data dengan kecepatan 512 kbps. Satelit C-band, yang akan berada di 118 BT, mempunyai berat 2400 kg, kapasitas daya 1.5 kW, dan dapat melayani komunikasi data dengan kecepatan 10 Mbps. Kedua satelit tersebut dapat beroperasi selama 10 tahun.

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

Light-Weight Tire Concept

1996 ◽  
Vol 24 (2) ◽  
pp. 119-131
Author(s):  
F. Lux ◽  
H. Stumpf
Keyword(s):  
Fuel Consumption ◽  
Automobile Industry ◽  
Rolling Resistance ◽  
Performance Standards ◽  
Light Weight ◽  
Production Methods ◽  
Lower Fuel Consumption ◽  
Material Resources ◽  
The Past ◽  
Tire Production

Abstract Current demands by the consumer, the automobile industry, and the environment have determined the basis of this investigation. In the past, the requirements—ever faster, ever sportier—were accepted as decisive parameters for the development of our study. In the future, rational and safety-related tire characteristics as well as environmental consciousness will increase, whereas purely performance-related parameters will diminish in their importance. Through our light-weight tire project, we have paved the way for future tire generations. The first priority is the minimal use of material resources; this means a reduction of materials and energy in tire production by using advanced design and production methods without sacrificing performance standards. This benefits the consumer—the final judge of all of our activities—by considerably reducing the rolling resistance, leading to lower fuel consumption. Further design targets include the improvement of rolling behavior and increased comfort by reducing tire weight, and therefore a reduction in unsprung masses on the vehicle.

Electrolytic analysis with platinum electrodes of light weight

1912 ◽  
Vol s4-34 (200) ◽  
pp. 107-112
Author(s):  
F. A. Gooch ◽  
W. L. Burdick
Keyword(s):  
Light Weight ◽  
Platinum Electrodes

Determinants Considered by Consumers for Brand Selection - with Reference to Laptops in Albania

2014 ◽  
Vol 4 (2) ◽  
Author(s):  
Margret Plloçi ◽  
Macit Koc
Keyword(s):  
Primary Data ◽  
Battery Life ◽  
Decision Making Process ◽  
Light Weight ◽  
Sources Of Information ◽  
Technical Features ◽  
The Relationship ◽  
The City ◽  
Different Sources ◽  
Core Features

Abstract Purpose of the article There is relatively a big number of brands in the market of laptops nowadays in Albania. It appears that the number of brands offered in this market could easily be compared to the number of brands in Europe and even broader. The purpose of this study is to help Albanian vendors understand the criteria that consumers take into consideration when they make the decision to purchase a laptop. Methodology/methods The research is based on the collection and the analyses of the primary data collected through interviews to people like managers or employees who work in the sector of trading laptops or in businesses like education where laptops are broadly used recently; then a survey is done through a questionnaire delivered to customers who already own and use a laptop and customers who are potential buyers of laptops. Scientific aim The aim of the research is to identify if there are any relationships between the demographics of the consumers and the criteria of buying a laptop; on the other hand, to find out how is the relationship between the demographics and the features of different brands. Findings The study found out that Albanian consumers have good knowledge of laptops and their brands, and they use different sources of information for making their decisions in buying a laptop; it is found that there are relationships between some demographics like age or gender and the appraisal for some attributes of the laptops like price, design and high graphics card; it is also found that some technical features and other attributes of using laptops are some of the determinants that influence the laptops’ purchases. Conclusions It is realized that one of the most important demographics of the consumers is their age. Some core features like RAM, ROM, battery life, processor quality, light weight or attributes that are connected to the purposes of using the laptop computers like practicality and mobility in using them, work and studying processes, quick access to the internet are determinant factors which influence the decision making process of purchasing a laptop. I would recommend that future researches be focused also on the relationship between the customers’ income and their preferred brand or ranking brands according to the customers’ preferences. Such studies should also extend outside the city of Tirana.

Bashneft digital transformation: from concept design to implementation

2019 ◽  
pp. 7-12 ◽  
Author(s):  
A.N. Shishkin ◽  
◽  
E.O. Timashev ◽  
V.I. Solovykh ◽  
M.G. Volkov ◽  
...  
Keyword(s):  
Digital Transformation ◽  
Concept Design
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