2,121 research outputs found
Monitoring Suhu Ruang Server di Pt.tiki Tangerang
Computer/laptop is an electronic device that is commonly used as a tool to do all the activities that can assist humans in many different areas of business, besides in its use should be cared for properly, PT TIKI Tangerang does not yet have the server so that the room temperature with the progress of science and technology in particular in the field of mikrokontroller then it can be created server room temperature monitoring system based arduino , by utilizing the workings of LM35 temperature sensor then can be made of temperature monitor system for the performance of the server space. By utilizing a lcd display 16x2 then the temperature of the processor can be shown on the display screen in theform of characters in the form of analogue to digital conversion. And by utilizing the local website then the results the LM35 temperature sensor detection tesimpan into the database can be seen wherever and whenever. LM35 temperature sensor readings are processed mikrokontroller jawani arduino, and data results from the process will be shown to the lcd display. the system can display the temperature at any moment in time one time per second. And by utilizing the W5100 ethernet shield then the tesimpan detection results into the database can be viewed on the website of the local
Coding, Analysis, Interpretation, and Recognition of Facial Expressions
We describe a computer vision system for observing facial motion by using an optimal estimation optical flow method coupled with a geometric and a physical (muscle) model describing the facial structure. Our method produces a reliable parametric representation of the face's independent muscle action groups, as well as an accurate estimate of facial motion. Previous efforts at analysis of facial expression have been based on the Facial Action Coding System (FACS), a representation developed in order to allow human psychologists to code expression from static pictures. To avoid use of this heuristic coding scheme, we have used our computer vision system to probabilistically characterize facial motion and muscle activation in an experimental population, thus deriving a new, more accurate representation of human facial expressions that we call FACS+. We use this new representation for recognition in two different ways. The first method uses the physics-based model directly, by recognizing..
Use of hydrogel scaffolds to develop an in vitro 3D culture model of human intestinal epithelium
The human intestinal cell lines: Caco-2 and HT29-MTX cells have been used extensively in 2D and 3D cell cultures as simple models of the small intestinal epithelium in vitro. This study aimed to investigate the potential of three hydrogel scaffolds to support the 3D culture of Caco-2 and HT29-MTX cells and critically assess their use as scaffolds to stimulate villi formation to model a small intestinal epithelium in vitro. Here, alginate, l-pNIPAM, and l-pNIPAM-co-DMAc hydrogels were investigated. The cells were suspended within or layered on these hydrogels and maintained under static or dynamic culture conditions for up to 21days. Caco-2 cell viability was increased when layered on the synthetic hydrogel scaffolds, but reduced when suspended within the synthetic hydrogels. In contrast, HT29-MTX cells remained viable when suspended within or layered on all 3D cultures. Interestingly, cells cultured in and on the alginate hydrogel scaffolds formed multilayer spheroid structures, whilst the cells layered on synthetic hydrogels formed villus-like structures. Immunohistochemistry staining demonstrated positive expression of enterocyte differentiation markers and goblet cell marker. In conclusion, l-pNIPAM hydrogel scaffolds supported both cell lines and induced formation of villus-like structures when cells were layered on and cultured under dynamic conditions. The ability of the l-pNIPAM to recapitulate the 3D structure and differentiate main cell types of human intestinal villi may deliver a potential alternative in vitro model for studying intestinal disease and for drug testing. Forty percent of hospital referrals are linked to disorders of the digestive tract. Current studies have utilised animal models or simple cultures of isolated cells which do not behave in the same manner as human intestine. Thus new models are required which more closely mimic the behaviour of intestinal cells. Here, we tested a number of scaffolds and conditions to develop a cell culture model which closely represents the 3D environment seen within the human small intestine. We successfully created structures seen within the intestine which have not previously been possible with other culture models. These models could be used to investigate tissue engineering, drug discovery, and used asan alternative to in vivo animal models in drug toxicity studies. [Abstract copyright: Copyright © 2017. Published by Elsevier Ltd.
Effect of casting practice on the reliability of Al cast alloys
The properties of aluminium castings are strongly affected by their inclusion content, particularly entrained surface alumina films. These form due to the surface turbulence associated with mould filling, which causes the oxidised surface of a liquid metal to fold-over onto itself and be submerged into the bulk liquid with a thin layer of air entrapped within it. This is known as entrainment action. These flaws have been reported to increase the variability of the fracture strengths of Al alloy castings. This means that shape castings in light alloys can have inconsistent properties, which makes designing structures employing shape castings more difficult. Entrained surface layers can cause premature failure, but also have been associated with other defects, such as hydrogen porosity, shrinkage porosity, intermetallic compounds and hot tearing. Recent research has suggested that the air inside the defect would react with the surrounding melt leading to its consumption, which may enhance the mechanical properties of the casting. In this work, liquid aluminium was poured into three identical ceramic moulds which were immediately placed in a furnace to preserve the molten metal at 800 C, for different periods of time prior to freezing. The Weibull moduli of the plate castings were determined under tensile conditions, and their fracture surfaces examined using SEM. Investigation of the fracture surfaces of the specimens detected many alumina layers at different locations. Many of which were found inside pores, reflecting the role of entrained defects in the formation of porosity. The results also suggested that opposite phenomena may take place during the holding treatment. The consumption of air inside the entrained defects due to reaction with the surrounding molten metal may lead to improvements in mechanical properties, but this may be accompanied by hydrogen passing into the defects, which has a deleterious effect on properties
Video face replacement
We present a method for replacing facial performances in video. Our approach accounts for differences in identity, visual appearance, speech, and timing between source and target videos. Unlike prior work, it does not require substantial manual operation or complex acquisition hardware, only single-camera video. We use a 3D multilinear model to track the facial performance in both videos. Using the corresponding 3D geometry, we warp the source to the target face and retime the source to match the target performance. We then compute an optimal seam through the video volume that maintains temporal consistency in the final composite. We showcase the use of our method on a variety of examples and present the result of a user study that suggests our results are difficult to distinguish from real video footage.National Science Foundation (U.S.) (Grant PHY-0835713)National Science Foundation (U.S.) (Grant DMS-0739255
Investigation and performance optimization of mesh networking in Zigbee
The aim of this research paper is to perform a detailed investigation and performance optimization of mesh networking in Zigbee. ZigBee applications are open and global wireless technology that are based on IEEE 802.15.4 standard, it is used for sense and control in many fields like, military, commercial, industrial and medical applications. Extending ZigBee lifetime is a high demand in many ZigBee networks industry and applications, and since the lifetime of ZigBee nodes depends mainly on batteries for their power, the desire for developing a scheme or methodology that support power management and saving battery lifetime is of a great requirement. In this research work, a power sensitive routing Algorithm is proposed Power Sensitive Ad hoc On-Demand (PS-AODV) to develop protocol scheme and methodology of existing on-demand routing protocols, by introducing an algorithm that manages ZigBee operations and construct the route from trusted active nodes. Furthermore, many aspects of routing protocol in ZigBee mesh networks have been researched to concentrate on route discovery, route maintenance, neighbouring table, and shortest paths. PS-AODV routing algorithm is used in two different ZigBee mesh networks, with two different coordinator locations, one used at the centre and the other one at the corner of the networks. The extracted results conclude a better network operation for the coordinator located at the centre with an increase in the network lifetime around 20% percentage, and saved about 32.7% of delay time compare to AODV
A RESTful API for Supporting Automated BioBrick Model Assembly
Constructing simulatable models for BioBricks by hand is a complex and time-consuming task. The time taken could be reduced by using Computer Aided Design (CAD) tools to aid in designing models, but these tools need to be augmented with domain-specific knowledge. Here we propose a standard for a RESTful (Richardson, 2007) API which facilitates the discovery and publication of models of functional biological units. This API is designed to produce parts models which can be automatically combined into complete, simulatable models of entire systems
Investigation and performance optimization of mesh networking in Zigbee
The aim of this research paper is to perform a detailed investigation and performance optimization of mesh networking in Zigbee. ZigBee applications are open and global wireless technology that are based on IEEE 802.15.4 standard, it is used for sense and control in many fields like, military, commercial, industrial and medical applications. Extending ZigBee lifetime is a high demand in many ZigBee networks industry and applications, and since the lifetime of ZigBee nodes depends mainly on batteries for their power, the desire for developing a scheme or methodology that support power management and saving battery lifetime is of a great requirement. In this research work, a power sensitive routing Algorithm is proposed Power Sensitive Ad hoc On-Demand (PS-AODV) to develop protocol scheme and methodology of existing on-demand routing protocols, by introducing an algorithm that manages ZigBee operations and construct the route from trusted active nodes. Furthermore, many aspects of routing protocol in ZigBee mesh networks have been researched to concentrate on route discovery, route maintenance, neighbouring table, and shortest paths. PS-AODV routing algorithm is used in two different ZigBee mesh networks, with two different coordinator locations, one used at the centre and the other one at the corner of the networks. The extracted results conclude a better network operation for the coordinator located at the centre with an increase in the network lifetime around 20% percentage, and saved about 32.7% of delay time compare to AODV
Assessment of Genetic Biodiversity of Several Traits Using SSR Markers in Rice (Oryza sativa L.)
Eight primers (RM 315, RM 318, RM 166, RM 302, RM 201, RM 234, RM 526 and RM 144) revealed different levels of polymorphism to tag the related traits of interest as tolerant to abiotic stress, resistant to biotic stress and yield-related traits. Two primers (RM 190 and RM 278) were monomorphic. The percentage of the polymorphism was nearly 80 %. The size of detected fragments ranged from 105–325 bp. A total of 186 bands were scored from the amplification products with the ten SSR primers. Genetic diversity analyses were conducted on the basis of the scores with 176 unique bands. Phylogenic tree for the fifteen rice accessions from each group were established according to the molecular data and based on ten SSRs. A marked genetic diversity was observed in these innovative accessions (Sakha 101, IR 03N137, IR 83142-12, IR 87856-10-AJY-1-B, HHZ 12-Y4-DT1-Y2 and IR 1552), which revealed higher levels of diversity and hence can be used as donors for the effective conservation, utilization and providing favorable genes in rice breeding programs
An iterative approach of hot isostatic pressing tooling design for net-shape IN718 superalloy parts
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