Miracle-dz/UniFAR-FTUs huggingface dataset:
Internal Flow Analysis of Large L/D Solid Rocket Motors

Traditionally, Solid Rocket Motor (SRM) internal ballistic performance has been analyzed and predicted with either zero-dimensional (volume filling) codes or one-dimensional ballistics codes. One dimensional simulation of SRM performance is only necessary for ignition modeling, or for motors that have large length to port diameter ratios which exhibit an axial "pressure drop" during the early burn times. This type of prediction works quite well for many types of motors, however, when motor aspect ratios get large, and port to throat ratios get closer to one, two dimensional effects can become significant. The initial propellant grain configuration for the Space Shuttle Reusable Solid Rocket Motor (RSRM) was analyzed with 2-D, steady, axi-symmetric computational fluid dynamics (CFD). The results of the CFD analysis show that the steady-state performance prediction at the initial burn geometry, in general, agrees well with 1-D transient prediction results at an early time, however, significant features of the 2-D flow are captured with the CFD results that would otherwise go unnoticed. Capturing these subtle differences gives a greater confidence to modeling accuracy, and additional insight with which to model secondary internal flow effects like erosive burning. Detailed analysis of the 2-D flowfield has led to the discovery of its hidden 1-D isentropic behavior, and provided the means for a thorough and simplified understanding of internal solid rocket motor flow. Performance parameters such as nozzle stagnation pressure, static pressure drop, characteristic velocity, thrust and specific impulse are discussed in detail and compared for different modeling and prediction methods. The predicted performance using both the 1-D codes and the CFD results are compared with measured data obtained from static tests of the RSRM. The differences and limitations of predictions using ID and 2-D flow fields are discussed and some suggestions for the design of large L/D motors and more critically, motors with port to throat ratios near one, are covered.
Analytical expression for electric field between two facing strip electrodes in microchannel

An analytical solution is presented for the electric field between two facing strip electrodes situated in a microchannel, as frequently used in impedance cytometry applications. The measured change in resistance as induced by a 5 mm bead moving through the microchannel is in good agreement with the model. It is also demonstrated that the centre sensitivity is maximal for an electrode width equal to 56% of the channel height.
A local area position location system

An automatic position and control (APAC) system is being developed using hyperbolic radio position location methods. The system provides near real time three dimensional position information within a local area for navigation and control use. The system has applications in construction automation, autonomous guided vehicle control, industrial safety, automatic vehicle location in metropolitan areas, and the cellular telephone network. Computer simulations have been developed which permit evaluation of the system's performance under various operating conditions. >
Analysis of Skills Needs for Future Architecture Graduates of Building Information Modelling (BIM) in Malaysia: A Thematic Review Paper

Building Information Modelling (BIM) has become an essential tool for improving construction methods in delivering projects. Yet, much BIM-related expertise is needed to achieve the performance quality of the projects. The Malaysian Construction Industry Transformation Plan (CITP) 2016 – 2020 under the Construction Industry Development Board (CIDB) highlights that the government is beginning to follow the BIM for level 2 by 2020. The move was to improve the adoption and implementation of BIM among the practitioners in the construction industry. The government initiatives have raised the importance of BIM skills and knowledge among practitioners to facilitate successful implementation of BIM-related projects. This paper reports the findings of a thematic review analysis of skills that need to be harnessed from architecture graduates in preparing them to undertake BIM-related projects. Publications from 2010 – 2020 were analysed by means of a thematic review. Findings from the code-to-document review using ATLAS.ti 8 identified the BIM skills needed from an employee. This paper contributes to analysing the BIM skills indicated from the published papers hence the avenue for future studies on BIM graduates' preparation prior to entering the labour market in Malaysia.
Can We Trust the Results of Meta-Analyses?: A Systematic Approach to Sensitivity Analysis in Meta-Analyses

Every meta-analysis involves a number of choices made by the analyst. These choices may refer to, for example, estimator of effect, model for analysis (fixed effects or random effects), or the treatment of varying study quality. The choices made can affect the results of the analysis. Every meta-analysis should therefore include a sensitivity analysis, designed to probe how choices made as part of the analysis affect its results. This paper describes a systematic approach to sensitivity analysis in meta-analyses. An index intended to summarize the results of a sensitivity analysis, the robustness score, is developed. The robustness score varies from 0 to 1. A value of 1 indicates that the results of a meta-analysis are robust; they are not at all affected by the choices made by the analyst. It is proposed that every meta-analysis include a sensitivity analysis for (a) the potential presence of publication bias, (b) the choice of estimator of effect (if relevant), (c) the possible presence of outlier bias (a single result having decisive influence on the summary estimate), (d) statistical weighting of individual estimates of effect, and (e) assessment of study quality. A recently reported meta-analysis of studies that have evaluated the effects on road safety of daytime running lights for cars is used as a case to explain the proposed approach to sensitivity analysis.
Current-controllable fully-integrated inductor simulator using CCCIIs

A novel current controllable floating or grounded inductor simulator circuit with minimum elements is proposed. The circuit uses two dual output- second generation current controlled conveyors (DO-CCCIIs) with parasitic resistance at terminal X and one grounded capacitor externally connected. Proposed circuit is suitable for fully integrated circuit design. Analysis and simulation results are included.
Review of practice-led research in art, design & architecture

This review report sets out the outcomes of a 10 month investigation to describe the landscape of practice-led research in Art, Design and Architecture (ADA) in the UK and beyond. We were asked for a qualitative review but of course it has been important to gather some numbers to check and illustrate our observations. We have consulted widely, both face to face and in the virtual world, with experts and novices in the UK and around the world. We have tried to strike a balance between the natural desire of our colleagues to debate the more contentious aspects of this territory (they were never going to forgo that opportunity) and the equally strong wish of the AHRC that we should provide a clear description of what is happening. We have collected some diverse examples of research and subjected them to various examinations. We have also examined a selection of research projects funded by AHRC and other projects by creative practitioners, funded by a non-research organisation. From all this we have been able to describe the landscape in a straightforward sense: We have measures of the proportions of ADA academics involved in practice-led research. We have clarified differences in the ways that the different ADA disciplines engage with practice-led research and identified some problems that indicate possible future support strategies. We have discussed some problems with general definitions of research and identified issues that should be addressed to ensure that the AHRC definition can be applied to the full range of practice-led research. We have picked out some specific case examples that illustrate the range of contexts, methods and contributions made by practice-led researchers, and more are described in detail in Appendix F. We have also sought to assess how this research relates to the wider international picture in which the UK appears to have a strong position in both volume and development of research. We have also set out some issues that affect this community of researchers: What strengths and weaknesses have we observed and where is there a need to support development? Do the AHRC definition of research and guidance on practice-led research provide an effective framework? We have illustrated the state of development of research in ADA, and some reasons why it is less robust than might be expected from such long established disciplines. We recommend that the career path of researchers in ADA needs some attention and make some suggestions about how that could be achieved. We have also indicated some areas of inquiry that might be supported to advance the theory and methods of practice-led research. In particular we have come to the conclusion that conventional ideas of contribution to knowledge or understanding may not be serving us well. This is significant to fine artists but we believe that it relevant across ADA and a shared effort to develop appropriate new models would be a constructive development. The full set of recommendations can be found in chapter 5.
Lubrication Effect of the Nozzle Layout for Arc Tooth Cylindrical Gears

In order to study the influence of fuel injection nozzle arrangement on the lubrication effect of arc tooth cylindrical gear, a model of fuel injection lubrication was established, and computational fluid dynamics (CFD) software was used for simulation calculation. The focus on the influence of gear parameters, oil jet conditions and nozzle layout on gear lubrication performance is studied. The results show that reducing the oil jet distance not only improves the lubrication performance of the gear but also reduces the offset of the oil jet streamline. The reasonable of nozzle layout is the premise of ensuring better lubrication conditions, and the best nozzle layout scheme is obtained through data comparison analysis. The lubrication effect decreases when the nozzle angle is offset. The lubrication effect does not change when the nozzle is horizontally offset by a distance of 0.5 module in the direction of the pinion, and the lubrication performance is degraded when the distance exceeds 0.5 module. Finally, the influence of nozzle diameter on lubrication is analyzed, the lubrication effect is directly proportional to the nozzle diameter.
Real-Time Soft Shadow Generating in Three-Dimensional Scene

For the sake of improving the third dimension of 3D scenes, we analyze the existent real-time shadow generating algorithms, and improve the Chan’s smoothie soft shadow algorithm, make it based on shadow map, and treat with both the inner and outer penumbra. It not only effectively resolves the problems such as some algorithms can not cast shadow on itself and some are too complex, it also solves the aliasing problems of shadow mapping, and it meet the requirements of real-time in more complex scene. At last, the algorithm is emulated with DirectX, and the experimental results show the feasibility of the algorithm.
Front-end Electronics for Spectroscopy Applications (FESA) IC

Non-destructive evaluation and inspection using X-rays require the detection of large photon fluxes. Typically, this requirement is met by operating the detectors in current mode, at the expense of the ability to measure the photon energy. This makes it necessary to obtain the energy information by other means, such as varying the energy of the X-ray source. We have developed an integrated circuit for the fast readout of solid-state X-ray and gamma ray detectors with multi-energy capability. The 32-channel Front-end Electronics for Spectroscopy Applications (FESA) chip is designed to handle photon rates in excess of one million photons per second per channel. In each channel, the detector pulses are shaped and amplified and then processed by a simple pulse-height analyzer that consists of five comparators each of which is connected to a dedicated counter. The 160 counters an each chip can be read out in less than 25 /spl mu/s. The FESA IC features digitally controlled gains and offsets, a calibration input and an analog test output, both of which can be connected to any channel. The five comparator threshold voltages, common to all channels, are provided externally, as is the current that controls the pulse shaping time.
Dynamic neural network calibration of quartz transducers

The performance of quartz pressure transducers is often compromised when subjected to thermal transients. In this paper, a new method of calibrating quartz transducers in which a neural network is used to accomplish a dynamic calibration of a transducer pair for a range of temperatures and pressures will be described. When a quartz pressure transducer is exposed to an environmental temperature change, thermal stress is induced in the sensing element. This thermal stress causes erroneous pressure readings until thermal equilibrium is achieved within the transducer. In order to compensate the undesirable transient thermal effects on the pressure transducer performance, multiple past and future temperature‐and‐pressure sensor outputs are used as inputs to a calibrating neural network. This new method allows the time‐dependent qualities of the quartz‐oscillator transducer to be included in the calibration scheme. This method can be applied generally to other types of transducers that are subjected to transient environmental effects and is not limited to quartz‐oscillator transducers. A theoretical discussion of this technology is presented, followed by experimental results obtained by applying the method to quartz pressure transducer calibration. Copyright © 2002 John Wiley & Sons, Ltd.
ICCB Program Review: Assisting Illinois Community Colleges to Improve Quality

This qualitative case study explored the process that the Illinois Community College Board (ICCB) undertook to evaluate their statewide Program Review system and the modifications that were implemented based upon that evaluation. Data was collected through interviews with members of the Task Force that undertook the review and recommended the changes to the system. Extant documents that were used by the Task Force further enriched the findings and analysis which was done through the lens of the Baldrige A-D-L-I (Approach, Deployment, Learning, Integration) Process Evaluation rubric. Although the steps taken through the work of the Task Force seemed to align well with the A-D-L-I rubric, due to decreased staffing and limited resources at ICCB, an on-going and more robust system to assess the Program Review system was not built into the modified system. Therefore, the improvements appeared to be a more limited improvement event rather than facilitating on-going, continuous quality improvement of the Program Review system.
Non-uniform bandwidth frequency-planar (NUB-FP) filter banks

A 3D non-uniform bandwidth frequency-planar (NUB-FP) filter bank structure is described, having a steady-state frequency response with a 3D stop band that approximates that of a wide band 3D cone. Equivalently, the 3D pass band ideally surrounds a 3D plane and has a 3D bandwidth that is approximately proportional to distance from the origin in the 3D frequency space. It is shown that the proposed NUB-FP filter bank is useful for the selective filtering of 3D spatio-temporal constant velocity signals (i.e. linear trajectory signals) and yields improved results over that of conventional 3D frequency-planar (FP) velocity filters. An example is given that yields improved moving high-frequency object details in a de-noised video sequence.
SPICE modelling of magnetic tunnel junctions written by spin-transfer torque

Spintronics aims at extending the possibility of conventional electronics by using not only the charge of the electron but also its spin. The resulting spintronic devices, combining the front-end complementary metal oxide semiconductor technology of electronics with a magnetic back-end technology, employ magnetic tunnel junctions (MTJs) as core elements. With the intent of simulating a circuit without fabricating it first, a reliable MTJ electrical model which is applicable to the standard SPICE (Simulation Program with Integrated Circuit Emphasis) simulator is required. Since such a model was lacking so far, we present a MTJ SPICE model whose magnetic state is written by using the spin-transfer torque effect. This model has been developed in the C language and validated on the Cadence Virtuoso Platform with a Spectre simulator. Its operation is similar to that of the standard BSIM (Berkeley Short-channel IGFET Model) SPICE model of the MOS transistor and fully compatible with the SPICE electrical simulator. The simulation results obtained using this model have been found in good accord with those theoretical macrospin calculations and results.
INFLUENCE OF RED WINE GRAPE PHENOLIC EXTRACTS ON GLUCOSYLTRANSFERASE ACTIVITY, ACIDOGENICITY, AND BIOFILM FORMATION OF STREPTOCOCCUS MUTANS.

This project was supported by the Field of Food Science and Technology SUNY fellowship program and the National Research Initiative Grant No. 2006-35200-16589 from the USDA Cooperative State Research, Education, and Extension Service Bioactive Food Components for Optimal Health (31.0) program. Travel grants were provided by the Western New York Institute of Food Technologists section and the Department of Food Science.
Metastasis to Submandibular Salivary Gland in Oral Carcinoma

Objective: To determine the frequency of involvement of the submandibular gland as a metastatic site in squamous cell carcinoma of oral cavity, mechanism of its involvement and factors associated with it. Method: We reviewed the medical and pathologic records of patients who underwent neck dissection (unilateral or bilateral) for oral cavity squamous cell carcinomas (SCC) from January 2009 to July 2017 at the Liaquat National Hospital in Karachi. Cases of histopathologically confirmed SCC of oral cavity and cases of primary tumor in which excision of the submandibular gland (SMG) was done along with neck dissection were included. Those cases with previous surgery for oral cancer and those with previous chemo-radiotherapy were excluded. Results: Median age at presentation was 49.50 years (IQR= 42-58 years). Males were more commonly affected (n=167, 79.5%). The most frequent involved site was buccal mucosa (n=110, 52.4%). Out of 210 neck dissections, SMG was involved by the tumor metastasis in only 8 (3.8%) of the cases. Most common method of involvement was direct invasion by the primary tumor (n=5, 62.5%). Floor of mouth (p<0.001) and level 1 lymph node involvement (p<0.001) were significantly associated with SMG involvement. Conclusion: SMG is the major source of unstimulated saliva. Saliva plays an important role in maintaining oral hygiene and health. Especially in patients of oral cavity SCC who receive post-operative radiotherapy its removal can aggravate xerostomia which can lead to severe discomfort. In this study there was no involvement of SMG in cases in which floor of mouth was not involved and in cases with clinically negative neck. So we concluded that efforts should be made to preserve SMG in these cases to reduce post-operative morbidity associated with its removal.
Simulation Based Low Powertest Generation for Crosstalk Delay Faults

Abstract Crosstalk faults in deep submicron cause severe design validation and test problems. Further power consumption during testing is becoming a critical factor. The proposed Weighted Sum Genetic Algorithm (WSGA) based Automatic Test Pattern Generation (ATPG) for crosstalk induced delay faults generates test sequences that has high-fault coverage with reduced power consumption. The effectiveness of various crossover operators was analysed. Experimental results with ISCAS 85 and scan version of ISCAS 89 benchmark circuits demonstrate that the proposed WSGA based ATPG with Weight based Crossover Operator (WCO) provides compact test vectors that have higher fault coverage with minimum number of transitions for most of the benchmark circuits when compared with those generated by Genetic Algorithm (GA) based ATPG.
The complete chloroplast genome of horned holly, Ilex cornuta Lindl. & Paxton (Aquifoliaceae)

Abstract Ilex cornuta Lindl. & Paxton is a species distributed in eastern China and Korea, utilized as traditional medical plants as well as horticultural species. Here, we completed chloroplast genome of I. cornuta. Its length is 157,224 bp long and has four subregions: 86,610 bp of large single copy (LSC) and 18,429 bp of small single copy (SSC) regions are separated by 26,092 bp of inverted repeat (IR) regions including 131 genes (86 protein-coding genes, eight rRNAs, and 37 tRNAs). The overall GC content of this chloroplast genome is 37.7% and those in the LSC, SSC, and IR regions are 35.7%, 31.9%, and 42.9%, respectively. Phylogenetic trees show that I. cornuta is clustered in Section Ilex clade clearly. In addition, two Ilex species from South America are not in a basal clade, which is different from previous phylogenetic study, suggesting more Ilex chloroplast genomes are required to understand phylogenetic relationships of Ilex species.
The Effects of Acquisitions on Firm Value, Evidence from Turkey

Şirket satin almalarinin hem satin alan hem de satilan firmanin piyasa degerini arttirdigi varsayilir. Bu makalede, Turkiye'de 2013 yilinda gerceklesen yerli satin almalar, piyasalarin genel trendini de goz onunde bulundurarak incelenmistir. Standart Piyasa degeri teknigini kullanarak, satin alan firmanin hisse senedi fiyatlarindaki anormal getiriler hesaplanmistir . Satin almanin aciklandigi tarih oncesi ve sonrasinin karsilastirilmasi sonucunda, firma degerindeki artisin uzun vadede istatistiki olarak anlamli oldugu, fakat kisa vadede anlamli olmadigi bulunmustur.