Selective Laser Sintering of Zirconia with Micro-Scale Features

Recent work in Selective Laser Sintering of ceramics at the University of Texas at Austin demonstrates the capability to produce zirconia parts with fine features. Zirconia powder was pre-processed into spherical particles, laser sintered with a sacrificial polymer binder, infiltrated and post-sintered to higher density. Optical micrographs show that hole sizes of 180 /-tm are possible in fully ceramic components.Mechanical Engineerin

Quantum-based Mechanical Force Realization in Pico-Newton Range

We propose mechanical force realization based on flux quantization in the pico-Newton range. By controlling the number of flux quantum in a superconducting annulus, a force can be created as integer multiples of a constant step. For a 50 nm-thick Nb annulus with the inner and outer radii of 5 $\mu$m and 10 $\mu$m, respectively, and the field gradient of 10 T/m the force step is estimated to be 184 fN. The stability against thermal fluctuations is also addressed.Comment: 5 pages; 4 figure

Minimax particle filtering for tracking a highly maneuvering target

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/152473/1/rnc4785_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/152473/2/rnc4785.pd

Development of a Chaff Dispense Program for Target Tracking Radar Deception

This study aims to develop an appropriate chaff dispensing program to deceive the target tracking radar (TTR) effectively. Chaff is a countermeasure commonly used by fighter aircraft to deceive TTR. However, there has been a lack of methodology for calculating chaff dispense programs that take into account the specific characteristics of the fighter, chaff, and TTR. This study proposes a methodology that considers these variables to calculate chaff dispense programs and addresses this gap. The proposed method is demonstrated through TESS engagement, which shows its effectiveness in various engagement situations

Functionally Gradient Material Design and Modeling Using Hypertexture for Solid Freeform Fabrication

SFF technologies have the potential to become manufacturing process that are capable of producing parts that have not been feasible by other techniques. The fabrication of Functionally Gradient Material (FGM) is one of the possible candidate. It is critical.to provide three dimensional material gradient data in the solid model to fabricate FGM. The approach is to model spatially varying material density distribution on implicit solid geometry using a hypertexturing scheme and a procedural volumetric modeling. It is essentially an extension of procedural solid texture synthesis, which has been effectively used to model cloud, gas, and flow stream. It will save the amount of information storage especially when the gradient pattern is repeating. Geometric operation becomes convenient since the material data are linked to the geometry only by the reference surfaces.Mechanical Engineerin

Peningkatan Daya Saing USAha UMKM Batik dan Tenun Riau melalui Efisiensi Produksi

Penelitian ini bertujuan untuk meningkatkan daya saing USAha Batik dan TenunRiau yang merupakan salah satu ciri khas Budaya Melayu melalui peningkatanefisiensi biaya produksi. dan menggunakan teknik pemasaran dengan cloudcomputing (computer awan). Pada saat ini hasil kerajinan Batik dan Tenun Riaumulai dikembangkan dan mulai diminati oleh masyarakat. Pada awalnya Tenun danBatik hanya dipakai pada acara tertentu dan digunakan oleh kalangan tertentu danUsia tertentu. Dengan berkembangnya disain dan corak Batik maka pada saat iniBatik dan Tenun telah berkembang penggunaanya tidak hanya pada acara resmi,atau hanya digunakan oleh kalangan tertentu. Batik dan Tenun Riau mulaidigunakan oleh masyarakat umum dan para kawula muda. Akan tetapi Tenun danBatik Riau sebagai salah satu pakain budaya melayu masih kalah dibandingkanBatik dan Tenun daerah lain. Hal ini disebabkan biaya produksi yang cukup tinggidan pemasaran yang masih kurang. Dari data yang dikumpulkan kendala yangdihadapi dalam produksi tenun adalah bahan baku berkualitas susah didapatkan.Bahan baku masih bersumber dari luar provinsi Riau bahkan luar negeri. Selain itukurangnya tenaga kerja juga merupakan kendala utama dalam produksi tenun.Masyarakat Riau sendiri banyak yang tidak berminat untuk melakukan pekerjaanmenenun, sehingga sumber tenaga kerja juga banyak berasal dari luar daerah Riau.Hal ini menyebabkan kurang berkembangnya produksi tenun dan dikhawatirkanjuga dapat menurunkan minat masyarakat Riau sendiri dalam peningkatan budayatenun