214,424 research outputs found
Advanced information processing system: The Army fault tolerant architecture conceptual study. Volume 1: Army fault tolerant architecture overview
Digital computing systems needed for Army programs such as the Computer-Aided Low Altitude Helicopter Flight Program and the Armored Systems Modernization (ASM) vehicles may be characterized by high computational throughput and input/output bandwidth, hard real-time response, high reliability and availability, and maintainability, testability, and producibility requirements. In addition, such a system should be affordable to produce, procure, maintain, and upgrade. To address these needs, the Army Fault Tolerant Architecture (AFTA) is being designed and constructed under a three-year program comprised of a conceptual study, detailed design and fabrication, and demonstration and validation phases. Described here are the results of the conceptual study phase of the AFTA development. Given here is an introduction to the AFTA program, its objectives, and key elements of its technical approach. A format is designed for representing mission requirements in a manner suitable for first order AFTA sizing and analysis, followed by a discussion of the current state of mission requirements acquisition for the targeted Army missions. An overview is given of AFTA's architectural theory of operation
Survey of Computer-Aided Engineering Software for Mechanical Design
In academia and industries, Computer-Aided Design (CAD) programs are used extensively as they help streamline the product development process and reduce cost by allowing parts to be modeled iteratively at a higher precision within a shorter time. Additionally, Finite Element Analysis (FEA) and Computer-Aided Engineering (CAE) programs are used to solve complex mathematical models that simulate real-world working environments that are otherwise time and labor intensive to solve manually. Despite the importance of these programs, there are 3 classes across the undergraduate and graduate levels at Washington University in St. Louis that emphasizes learning such programs. For undergraduates, only MEMS 202 is required while MEMS 103 and MEMS 5104 are an elective undergraduate and graduate class respectively. Therefore, this independent study aims to produce a roadmap by which a graduate CAE class can follow to give the students a deeper understanding of various programs. This provides the students the knowledge to then be able to choose the appropriate program to use in their future work
SIMULATING THE FITTING OF A PATTERN USING THE ASSYST ® 3D VIDYA PROGRAM
This paper aims to present the evolution of pattern construction in the textile industry starting from the manual construction of the basic pattern and ending with the current 3D method that is offered by most computer-aided design softwares. In this paper, the authors have chosen to present the way to simulate the fitting of a ladies' tunic and therefore to focus on the 3D Vidya design module, which is included in the computer-aided pattern making program Assyst. The computer-aided design program Assyst is in the top 3 of the kind programs used on the European market, the latest development being the 3D Vidya design module. Vidya's 3D module is now even more powerful, with incredibly realistic shadows and results thanks to the new V-RAY rendering system and PathTracer technology. With Vidya, one can instantly create avatars of the target group or a model in any size - all with lifelike sizes, shapes and realistic measurement increase or decrease across the full size range, which can be implemented in the shortest possible time. All digital accessories for simulation such as zippers, buttons, snaps have the characteristics of real accessories and behave as such, so in a simulation you can visualize exactly how a zipper behaves while in use
The Synthesizability of Molecules Proposed by Generative Models
The discovery of functional molecules is an expensive and time-consuming
process, exemplified by the rising costs of small molecule therapeutic
discovery. One class of techniques of growing interest for early-stage drug
discovery is de novo molecular generation and optimization, catalyzed by the
development of new deep learning approaches. These techniques can suggest novel
molecular structures intended to maximize a multi-objective function, e.g.,
suitability as a therapeutic against a particular target, without relying on
brute-force exploration of a chemical space. However, the utility of these
approaches is stymied by ignorance of synthesizability. To highlight the
severity of this issue, we use a data-driven computer-aided synthesis planning
program to quantify how often molecules proposed by state-of-the-art generative
models cannot be readily synthesized. Our analysis demonstrates that there are
several tasks for which these models generate unrealistic molecular structures
despite performing well on popular quantitative benchmarks. Synthetic
complexity heuristics can successfully bias generation toward
synthetically-tractable chemical space, although doing so necessarily detracts
from the primary objective. This analysis suggests that to improve the utility
of these models in real discovery workflows, new algorithm development is
warranted
DEM Solutions Develops Answers to Modeling Lunar Dust and Regolith
With the proposed return to the Moon, scientists like NASA-KSC's Dr. Calle are concerned for a number of reasons. We will be staying longer on the planet's surface, future missions may include dust-raising activities, such as excavation and handling of lunar soil and rock, and we will be sending robotic instruments to do much of the work for us. Understanding more about the chemical and physical properties of lunar dust, how dust particles interact with each other and with equipment surfaces and the role of static electricity build-up on dust particles in the low-humidity lunar environment is imperative to the development of technologies for removing and preventing dust accumulation, and successfully handling lunar regolith. Dr. Calle is currently working on the problems of the electrostatic phenomena of granular and bulk materials as they apply to planetary surfaces, particularly to those of Mars and the Moon, and is heavily involved in developing instrumentation for future planetary missions. With this end in view, the NASA Kennedy Space Center's Innovative Partnerships Program Office partnered with OEM Solutions, Inc. OEM Solutions is a global leader in particle dynamics simulation software, providing custom solutions for use in tackling tough design and process problems related to bulk solids handling. Customers in industries such as pharmaceutical, chemical, mineral, and materials processing as well as oil and gas production, agricultural and construction, and geo-technical engineering use OEM Solutions' EDEM(TradeMark) software to improve the design and operation of their equipment while reducing development costs, time-to-market and operational risk. EDEM is the world's first general-purpose computer-aided engineering (CAE) tool to use state-of-the-art discrete element modeling technology for the simulation and analysis of particle handling and manufacturing operations. With EDEM you'can quickly and easily create a parameterized model of your granular solids system. Computer-aided design (CAD) models of real particles can be imported to obtain an accurate representation of their shape. EDEM(TradeMark) uses particle-scale behavior models to simulate bulk solids behavior. In addition to particle size and shape, the models can account for physical properties of particles along with interaction between particles and with equipment surfaces and surrounding media, as needed to define the physics of a particular process
CAD/CAM, CNC TECHNOLOGY APPLIED IN THE FIELD OF ENGINEERING, SECURITY TECHNOLOGY AND MECHANICAL ENGINEER TRAINING I.
In the last decades the spectacular results of each
developmental stages of
computer-aided design, were considered as great magic of
computer use.
Professionals were shocked by the impressive building of
engineer works and
their more and more realistic appearance. It was hard to believe
and for many
people it still is that this technology becomes indispensable in
everyday
engineering work. By now, in front-rank product development, it
is impossible to
do a competitive designer work without applying the most up-to-
date design
technology. This all leads to the fact that an engineer student
of our days, in his
design practice, is definitely going to work with the
momentarily most up-to-date
technology, which will be out-of-date in a couple of years. |
A számítógépek alkalmazásának nagy varázslatai közé számított az
elmúlt
évtizedekben a számítógépen végzett tervezés egy-egy fejlıdési
szakaszának
látványos eredménye. Szakembereket is meghökkentett a mérnöki
alkotások
látványos építése és mind valósághőbb megjelenítése. Nehezen
hitték, sıt sokan
ma is nehezen hiszik azt, hogy a mérnöki munka mindennapjaiban
is
nélkülözhetetlenné válik ez a technika. Mára az élvonalbeli
termékfejlesztésben a
mindenkori legjobb tervezési technika igénybevétele nélkül
képtelenség
versenyképes tervezımunkát végezni. Ennek következtében napjaink
mérnökhallgatója tervezıi gyakorlatában minden bizonnyal a ma
legkorszerőbbnek számító, de néhány év alatt elavuló módszert
leváltó
technikával fog dolgozni.
Keywords/kulcsszavak: computer aided design, CAD1/CAM2, CNC3 ~
számítógépes tervezés, CAD/CAM, CN
Paper-based Mixed Reality Sketch Augmentation as a Conceptual Design Support Tool
This undergraduate student paper explores usage of mixed reality techniques as support tools for conceptual design. A proof-of-concept was developed to illustrate this principle. Using this as an example, a small group of designers was interviewed to determine their views on the use of this technology. These interviews are the main contribution of this paper. Several interesting applications were determined, suggesting possible usage in a wide range of domains. Paper-based sketching, mixed reality and sketch augmentation techniques complement each other, and the combination results in a highly intuitive interface
Pembangunan Modul Pengajaran Kendiri (MPK) keusahawanan dalam topik isu keusahawanan bagi pelajar diploma di politeknik
Terdapat pelbagai kaedah pembelajaran yang telah diperkenalkan termasuklah
kaedah pembelajaran yang menggunakan pendekatan pembelajaran bermodul secara
kendiri. Kajian ini adalah bertujuan untuk mengkaji kesesuaian Modul Pengajaran
Kendiri Keusahawanan dalam topik Isu Keusahawanan yang telah dihasilkan bagi
pelajar yang mengikuti pengajian Diploma di Jabatan Perdagangan Politeknik. Antara
aspek yang dikaji ialah untuk menilai sama ada rekabentuk modul yang dihasilkan dapat
memenuhi ciri-ciri modul yang baik, MPK yang dihasilkan dapat membantu mencapai
objektif pembelajaran, MPK ini bersifat mesra pengguna dan MPK yang dihasilkan
membantu pensyarah menyampaikan pengajarannya dengan lebih berkesan. Kajian ini
dilakukan ke atas 110 orang pelajar semester en am yang mengikuti pengajian diploma
dan 4 orang pensyarah yang mengajar subjek Keusahawanan di Jabatan Perdagangan
Politeknik Sultan Salahuddin Abdul Aziz Shah, Selangor. Kaedah analisa data yang
digunakan dalam kajian ini ialah skor min dan peratus. Hasil daripada kajian ini
menunjukkan bahawa rekabentuk modul yang dihasilkan memenuhi ciri-ciri modul
yang baik, MPK ini membantu untuk mencapai objektif pembelajaran, MPK ini
bersifat mesra pengguna dan MPK yang dihasilkan dapat membantu pensyarah
menyampaikan pengajarannya dengan lebih berkesan. Ini bermakna secara
keseluruhannya, hasil kajian menunjukkan bahawa modul yang dihasilkan oleh pengkaji
adalah sesuai digunakan oleh pelajar-pelajar semester enam yang mengikuti pengajian
diploma di Jabatan Perdagangan peringkat politeknik. Seterusnya, beberapa pandangan
telah dikemukakan bagi meningkatkan rnutu dan kualiti MPK yang dihasilkan. Semoga
kajian ini dapat memberi manfaat kepada mereka yang terlibat dalam bidang
pendidikan
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