bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on effects of mixing vane grids on coolant temperature distribution by subchannel analysis
Authors: Mao H. , Yang B.-W. , Han B.
Published: June 2016

Mixing vane grids (MVG) have great influence on coolant temperature field in the rod bundle. The MVG could enhance convective heat transfer between the fuel rod wall and the coolant, and promote inter-subchannel mixing at the same time. For the influence of the MVG on convective heat transfer enhancement, many experiments have been done and several correlations have been developed based on the experimental data. However, inter-subchannel mixing promotion caused by the MVG is not well estimated in subchannel analysis because the information of mixing vanes is totally missing in most subchannel codes. This paper analyzes the influence of mixing vanes on coolant temperature distribution using the improved MVG model in subchannel analysis. The coolant temperature distributions with the MVG are analyzed, and the results show that mixing vanes lead to a more uniform temperature distribution. The performances of split vane grids under different power conditions are evaluated. The results are compared with those of spacer grids without mixing vanes and some conclusions are obtained.
Numerical method improvement for a subchannel code
Authors: Ding W. J. , Gou J. L. , Shan J. Q.
Published: June 2016

Previous studies showed that the subchannel codes need most CPU time to solve the matrix formed by the conservation equations. Traditional matrix solving method such as Gaussian elimination method and Gaussian-Seidel iteration method cannot meet the requirement of the computational efficiency. Therefore, a new algorithm for solving the block penta-diagonal matrix is designed based on Stone's incomplete LU (ILU) decomposition method. In the new algorithm, the original block penta-diagonal matrix will be decomposed into a block upper triangular matrix and a lower block triangular matrix as well as a nonzero small matrix. After that, the LU algorithm is applied to solve the matrix until the convergence. In order to compare the computational efficiency, the new designed algorithm is applied to the ATHAS code in this paper. The calculation results show that more than 80 % of the total CPU time can be saved with the new designed ILU algorithm for a 324-channel PWR assembly problem, compared with the original ATHAS code.
Analysis of heat transfer under high heat flux nucleate boiling conditions
Authors: Liu Y. , Dinh N.
Published: June 2016

Analysis was performed for a heater infrared thermometric imaging temperature data obtained from high heat flux pool boiling and liquid film boiling experiments BETA. With the OpenFOAM solver, heat flux distribution towards the coolant was obtained by solving transient heat conduction of heater substrate given the heater surface temperature data as boundary condition. The so-obtained heat flux data was used to validate them against the state-of-art wall boiling model developed by Shaver [1] with the assumption of micro-layer hydrodynamics. Good agreement was found between the model prediction and data for conditions away from the critical heat flux (CHF). However, the data indicate a different heat transfer pattern under CHF, which is not captured by the current model. Experimental data strengthen the notion of burnout caused by the irreversible hot spot due to failure of rewetting. The observation forms a basis for a detailed modeling of micro-layer hydrodynamics under high heat flux.
Simulation of isothermal multi-phase fuel-coolant interaction using MPS method with GPU acceleration
Authors: Gou W. , Zhang S. , Zheng Y.
Published: June 2016

The energetic fuel-coolant interaction (FCI) has been one of the primary safety concerns in nuclear power plants. Graphical processing unit (GPU) implementation of the moving particle semi-implicit (MPS) method is presented and used to simulate the fuel coolant interaction problem. The governing equations are discretized with the particle interaction model of MPS. Detailed implementation on single-GPU is introduced. The three-dimensional broken dam is simulated to verify the developed GPU acceleration MPS method. The proposed GPU acceleration algorithm and developed code are then used to simulate the FCI problem. As a summary of results, the developed GPU-MPS method showed a good agreement with the experimental observation and theoretical prediction.
Evaluation of inbred lines of baby corn through line × tester method
Authors: Ahmed A , Begum S , Omy SH , Rohman MM , Amiruzzaman M
Published: June 2016

Seven lines of baby corn were crossed with 3 testers in a Line × Tester (L × T) mating design and the resulting 21 crosses along with parents and standard check Baby Star were evaluated to develop high yielding baby corn hybrids during rabi, 2014-15. Variance due to sca was larger than gca variance for all the characters indicating the preponderance of non additive gene action in the expression of various traits. Among the parents, BCP/S4-29, BCP/S4-31 and tester VS/S3-1 and VS/S3-26 were found as good general combiners for baby corn yield and important yield contributing characters. Considering baby corn yield, number of cobs/plant and other performances, the crosses BCP/S4- 2×VS/S3-1, BCP/S4-5×VS/S3-8, BCP/S4-10×VS/S3-8, BCP/S4-22×VS/S3-26 and BCP/S4-29×VS/S3-1 were selected as promising baby corn hybrids.Bangladesh J. Agril. Res. 41(2): 311-321, June 2016
Inheritance mechanism of yield and yield components in tomato
Authors: Goffar MA , Ahmed A , Halim GMA
Published: June 2016

A set of 9x9 half diallel cross comprising of promising genotypes was studied to analyze the inheritance pattern of yield components in tomato. Haymans analysis of variance (ANOVA) indicated importance of both additive and nonadditive genetic components for all the thirteen yield contributing characters. The ANOVA showed unidirectional dominance, asymmetrical gene distribution and residual dominance effects for all the characters studied. Five out of the thirteen characters viz., number of flowers/cluster, individual fruit weight, fruit breadth, number of locules and number of seeds/fruit followed the simple additive-dominance genetic model. The rest of the characters showed non-allelic gene interaction or epistasis. P6 had most of the dominant genes for both number of flowers/cluster and number of locules, while P3 contained most dominant genes for individual fruit weight and P5 possessed that for both fruit breadth and number of seeds/fruit. The estimates of components of variance demonstrated involvement of both additive and dominant components in the inheritance of all those five characters. The distribution of dominant and recessive genes was equal in the parents for only fruit breadth. There was drastic influence of environment on these characters following simple additive-dominance genetic model except fruit breadth.Bangladesh J. Agril. Res. 41(2): 335-344, June 2016
Development of mouza level databases of potato in Munshigong, Bogra & Rangpur district
Authors: Uddin MA , Rahman KS , Rahman MM , Mohammad N , Nasrin S
Published: June 2016

A study was conducted to build the mouza and union level databases of potato during 2011-12 using both primary and secondary data. Primary data were collected from potato growers of unions of three upazilas, namely Vober Char, (Gazaria, Munshigonj), Atmul, (Shibganj, Bogra) and Mittipur (Pirganj, Rangpur), respectively. Mouza, union, upazila and district level digitized maps of Bangladesh were used in the program. GIS, GPS, MIS, Modem and mobile phone technologies were used. Databases of different parameters such as area, production, yield, and varietal information etc. of potato were obtained. Mouza have been used as the smallest unit of land use management for agriculture because it has administrative boundary and social identity. Average yield of potato was 17.45 t/ha in the study areas during 2011-12. Out of total potato areas 69.06% was cultivated by HYVs and the rest 30.94% by local varieties. Out of 46 HYVs released by BARI, 11 varieties were cultivated in the study areas during the same period. Databases and maps developed by data collection from root level (Farmers field, mouza, block and union etc.) may help to identify variety wise area coverage of potato.Bangladesh J. Agril. Res. 41(2): 353-364, June 2016
Ultra High Pressure Homogenization of Soy Milk: Effect on Quality Attributes during Storage
Authors: Sidhu Jaideep , Singh Rakesh
Published: June 2016

The present work analyzed soy milk prepared from whole dehulled soybeans. The traditional method of soy milk preparation leads to wastage of about 35% of soybean solids in the form of okara, which gets filtered out. In the current study, soy milk was prepared with practically 100% recovery of soybean solids and treated with continuous flow high pressure processing (207 and 276 MPa pressure, 121 and 145 °C exit temperatures, and 0.75 and 1.25 L/min flow rates), and the changes in the physical, chemical, microbial, and sensory properties during 28 days of storage at 4 °C were analyzed. The treated soy milk remained stable for 28 days. There was a significant reduction in the particle size of soybean solids which did not change during storage. The pH of the treated soy milk was significantly lower than the untreated soy milk and it reduced further upon storage. The soy milk was pasteurized with high pressure processing coupled with preheating. No lipoxygenase activity was detected. Compared to commercial samples, there was no significant difference in the astringency, bitterness, or chalkiness of soy milk prepared in the study.
Daytime Variation of Urban Heat Islands: The Case Study of Doha, Qatar
Authors: Makido Yasuyo , Shandas Vivek , Ferwati Salim , Sailor David
Published: June 2016

Recent evidence suggests that urban forms and materials can help to mediate temporal variation of microclimates and that landscape modifications can potentially reduce temperatures and increase accessibility to outdoor environments. To understand the relationship between urban form and temperature moderation, we examined the spatial and temporal variation of air temperature throughout one desert city—Doha, Qatar—by conducting vehicle traverses using highly resolved temperature and GPS data logs to determine spatial differences in summertime air temperatures. To help explain near-surface air temperatures using land cover variables, we employed three statistical approaches: Ordinary Least Squares (OLS), Regression Tree Analysis (RTA), and Random Forest (RF). We validated the predictions of the statistical models by computing the Root Mean Square Error (RMSE) and discovered that temporal variations in urban heat are mediated by different factors throughout the day. The average RMSE for OLS, RTA and RF is 1.25, 0.96, and 0.65 (in Celsius), respectively, suggesting that the RF is the best model for predicting near-surface air temperatures at this study site. We conclude by recommending the features of the landscape that have the greatest potential for reducing extreme heat in arid climates.
Differences in the Association between Depression and Opioid Misuse in Chronic Low Back Pain versus Chronic Pain at Other Locations
Authors: Jaiswal Arpana , Scherrer Jeffrey , Salas Joanne , Van den Berk-Clark Carissa , Fernando Sheran , Herndon Christopher
Published: June 2016

Patients with chronic pain and depression are more likely to develop opioid abuse compared to patients without depression. It is not known if this association differs by pain location. We compared the strength of association between depression and opioid misuse in patients with chronic low back pain (CLBP) vs. chronic pain of other location (CPOL). Chart abstracted data was obtained from 166 patients seeking care in a family medicine clinic. Depression was measured by the PHQ-9 and opioid misuse was measured using the Current Opioid Misuse Measure. Pain severity and interference questions came from the Brief Pain Inventory. Cross-tabulations were computed to measure the association between depression and opioid misuse stratified on pain location. Exploratory logistic regression modeled the association between depression and opioid misuse after adjusting for pain location and pain severity and interference. Depression was significantly associated with opioid misuse in CPOL but not in CLBP. Regression results indicate pain interference partly accounts for the depression–opioid misuse association. These preliminary results from a small patient sample suggest depression may co-occur with opioid misuse more often in CPOL than in CLBP. Further research is needed to compare this comorbidity in specific pain diagnoses such as arthritis, fibromyalgia and CLBP.
Next Generation Sequencing Approach in a Prenatal Case of Cardio-Facio-Cutaneus Syndrome
Authors: Mucciolo Mafalda , Dello Russo Claudio , D’Emidio Laura , Mesoraca Alvaro , Giorlandino Claudio
Published: June 2016

Cardiofaciocutaneous syndrome (CFCS) belongs to a group of developmental disorders due to defects in the Ras/Mitogen-Activated Protein Kinase (RAS/MAPK) signaling pathway named RASophaties. While postnatal presentation of these disorders is well known, the prenatal and neonatal characteristics are less recognized. Noonan syndrome, Costello syndrome, and CFCS diagnosis should be considered in pregnancies with a normal karyotype and in the case of ultrasound findings such as increased nuchal translucency, polyhydramnios, macrosomia and cardiac defect. Because all the RASopathies share similar clinical features, their molecular characterization is complex, time consuming and expensive. Here we report a case of CFCS prenatally diagnosed through Next Generation Prenatal Diagnosis (NGPD), a new targeted approach that allows us to concurrently investigate all the genes involved in the RASophaties.
Vascular Development and Regeneration in the Mammalian Heart
Authors: Leung Oscar , Zhou Bin , Lui Kathy
Published: June 2016

Cardiovascular diseases including coronary artery disease are the leading cause of death worldwide. Unraveling the developmental origin of coronary vessels could offer important therapeutic implications for treatment of cardiovascular diseases. The recent identification of the endocardial source of coronary vessels reveals a heterogeneous origin of coronary arteries in the adult heart. In this review, we will highlight recent advances in finding the sources of coronary vessels in the mammalian heart from lineage-tracing models as well as differentiation studies using pluripotent stem cells. Moreover, we will also discuss how we induce neovascularization in the damaged heart through transient yet highly efficient expression of VEGF-modified mRNAs as a potentially therapeutic delivery platform.
Mechanical Alloying Synthesis of Co9S8 Particles as Materials for Supercapacitors
Authors: Li Bo , Hu Yuxia , Li Jiajia , Liu Maocheng , Kong Lingbin , Hu Yumei , Kang Long
Published: June 2016

Cobalt sulfide (Co9S8) particles are compounded as the electrode materials of supercapacitors by a mechanical alloying method. They show excellent properties including good cycling stability and high specific capacitance. A supercapacitor is assembled using Co9S8 as the anode and activated carbon (AC) as the cathode. It gains a maximum specific capacitance of 55 F·g−1 at a current density of 0.5 A·g−1, and also an energy density of 15 Wh·kg−1. Those results show that the novel and facile synthetic route may be able to offer a new way to synthesize alloy compounds with excellent supercapacitive properties.
Complex Mixture Analysis of Organic Compounds in Yogurt by NMR Spectroscopy
Authors: Lu Yi , Hu Fangyu , Miyakawa Takuya , Tanokura Masaru
Published: June 2016

NMR measurements do not require separation and chemical modification of samples and therefore rapidly and directly provide non-targeted information on chemical components in complex mixtures. In this study, one-dimensional (1H, 13C, and 31P) and two-dimensional (1H-13C and 1H-31P) NMR spectroscopy were conducted to analyze yogurt without any pretreatment. 1H, 13C, and 31P NMR signals were assigned to 10 types of compounds. The signals of α/β-lactose and α/β-galactose were separately observed in the 1H NMR spectra. In addition, the signals from the acyl chains of milk fats were also successfully identified but overlapped with many other signals. Quantitative difference spectra were obtained by subtracting the diffusion ordered spectroscopy (DOSY) spectra from the quantitative 1H NMR spectra. This method allowed us to eliminate interference on the overlaps; therefore, the correct intensities of signals overlapped with those from the acyl chains of milk fat could be determined directly without separation. Moreover, the 1H-31P HMBC spectra revealed for the first time that N-acetyl-d-glucosamine-1-phosphate is contained in yogurt.
High-Resolution α-Glucosidase Inhibition Profiling Combined with HPLC-HRMS-SPE-NMR for Identification of Antidiabetic Compounds in Eremanthus crotonoides (Asteraceae)
Authors: Silva Eder , Lobo Jonathas , Vinther Joachim , Borges Ricardo , Staerk Dan
Published: June 2016

α-Glucosidase inhibitors decrease the cleavage- and absorption rate of monosaccharides from complex dietary carbohydrates, and represent therefore an important class of drugs for management of type 2 diabetes. In this study, a defatted ethyl acetate extract of Eremanthus crotonoides leaves with an inhibitory concentration (IC50) of 34.5 μg/mL towards α-glucosidase was investigated by high-resolution α-glucosidase inhibition profiling combined with HPLC-HRMS-SPE-NMR. This led to identification of six α-glucosidase inhibitors, namely quercetin (16), trans-tiliroside (17), luteolin (19), quercetin-3-methyl ether (20), 3,5-di-O-caffeoylquinic acid n-butyl ester (26) and 4,5-di-O-caffeoylquinic acid n-butyl ester (29). In addition, nineteen other metabolites were identified. The most active compounds were the two regioisomeric di-O-caffeoylquinic acid derivatives 26 and 29, with IC50 values of 5.93 and 5.20 μM, respectively. This is the first report of the α-glucosidase inhibitory activity of compounds 20, 26, and 29, and the findings support the important role of Eremanthus species as novel sources of new drugs and/or herbal remedies for treatment of type 2 diabetes.
Fermented Red Ginseng Potentiates Improvement of Metabolic Dysfunction in Metabolic Syndrome Rat Models
Authors: Kho Min , Lee Yun , Park Ji , Kim Hye , Yoon Jung , Ahn You , Tan Rui , Park Min , Cha Jeong , Choi Kyung , Kang Dae , Lee Ho
Published: June 2016

Metabolic syndrome including obesity, dyslipidemia and hypertension is a cluster of risk factors of cardiovascular disease. Fermentation of medicinal herbs improves their pharmacological efficacy. Red ginseng (RG), a widely used traditional herbal medicine, was reported with anti-inflammatory and anti-oxidant activity. Aim in the present study was to investigate that the effects of fermented red ginseng (FRG) on a high-fructose (HF) diet induced metabolic disorders, and those effects were compared to RG and losartan. Animals were divided into four groups: a control group fed a regular diet and tap water, and fructose groups that were fed a 60% high-fructose (HF) diet with/without RG 250 mg/kg/day or FRG 250 mg/kg/day for eight weeks, respectively. Treatment with FRG significantly suppressed the increments of body weight, liver weight, epididymal fat weight and adipocyte size. Moreover, FRG significantly prevented the development of metabolic disturbances such as hyperlipidemia and hypertension. Staining with Oil-red-o demonstrated a marked increase of hepatic accumulation of triglycerides, and this increase was prevented by FRG. FRG ameliorated endothelial dysfunction by downregulation of endothelin-1 (ET-1) and adhesion molecules in the aorta. In addition, FRG induced markedly upregulation of Insulin receptor substrate 1 (IRS-1) and glucose transporter type 4 (Glut4) in the muscle. These results indicate that FRG ameliorates obesity, dyslipidemia, hypertension and fatty liver in HF diet rats. More favorable pharmacological effects on HF diet induced metabolic disorders were observed with FRG, compared to an equal dose of RG. These results showed that the pharmacological activity of RG was enhanced by fermentation. Taken together, fermentated red ginseng might be a beneficial therapeutic approach for metabolic syndrome.
Tumor Heterogeneity, Single-Cell Sequencing, and Drug Resistance
Authors: Schmidt Felix , Efferth Thomas
Published: June 2016

Tumor heterogeneity has been compared with Darwinian evolution and survival of the fittest. The evolutionary ecosystem of tumors consisting of heterogeneous tumor cell populations represents a considerable challenge to tumor therapy, since all genetically and phenotypically different subpopulations have to be efficiently killed by therapy. Otherwise, even small surviving subpopulations may cause repopulation and refractory tumors. Single-cell sequencing allows for a better understanding of the genomic principles of tumor heterogeneity and represents the basis for more successful tumor treatments. The isolation and sequencing of single tumor cells still represents a considerable technical challenge and consists of three major steps: (1) single cell isolation (e.g., by laser-capture microdissection), fluorescence-activated cell sorting, micromanipulation, whole genome amplification (e.g., with the help of Phi29 DNA polymerase), and transcriptome-wide next generation sequencing technologies (e.g., 454 pyrosequencing, Illumina sequencing, and other systems). Data demonstrating the feasibility of single-cell sequencing for monitoring the emergence of drug-resistant cell clones in patient samples are discussed herein. It is envisioned that single-cell sequencing will be a valuable asset to assist the design of regimens for personalized tumor therapies based on tumor subpopulation-specific genetic alterations in individual patients.
Effect of Very High Charge Density and Monomer Constitution on the Synthesis and Properties of Cationic Polyelectrolytes
Authors: Ahmadloo Hamideh , Losada Ricardo , Wandrey Christine
Published: June 2016

The free-radical homopolymerization of 1,3-bis(N,N,N-trimethylammonium)-2-propylmethacrylate dichloride (di-M) and 1,3-bis(N,N,N-trimethylammonium)-2-propylacrylate dichloride (di-A) in aqueous solution yields cationic polyelectrolytes (PEL) with theoretical/structural charge spacing of only ≈0.12 nm. The high charge density causes condensation of ≈82% of the chloride counterions. The high level of counterion condensation reduces the ionic strength in the polymerizing batch when the monomer molecules connect to PEL chains. This has the consequence that the hydrodynamic and excluded volume of the PEL molecules will change. Studies of the free radical polymerization revealed non-ideal polymerization kinetics already at low conversion and additionally autoacceleration above a certain monomer concentration and conversion. Similar autoacceleration was not observed for monomers yielding PEL with charge spacing of 0.25 or 0.5 nm. Coulomb interactions, monomer association, steric effects, and specific features of the monomer constitution have been evaluated concerning their contributions to the concentration dependence and conversion dependence of kinetic parameters. The different backbone constitutions of di-M and di-A not only influence the polymerization kinetics but also equip poly(di-M) with higher hydrolytic stability. The experimental results confirm the impact of electrochemical parameters and the necessity to reconsider their inclusion in kinetic models.
Qohelet and the Marks of Modernity: Reading Ecclesiastes with Matthew Arnold and Charles Taylor
Authors: Grillo Jennie
Published: June 2016

The biblical book of Ecclesiastes is often claimed as a harbinger of modernity. In this essay, I compare Ecclesiastes with two overlapping constructions of modernity, taken from Matthew Arnold and Charles Taylor, focusing especially on Taylor’s motifs of inwardness, narrativity, meaninglessness, and ordinary life. I suggest that the likeness to modernity in Ecclesiastes is a complex bundle of emphases held in tension, which remains hospitable to pre-modern understandings and commitments.
Transformation Model with Constraints for High-Accuracy of 2D-3D Building Registration in Aerial Imagery
Authors: Zhou Guoqing , Luo Qingli , Xie Wenhan , Yue Tao , Huang Jingjin , Shen Yuzhong
Published: June 2016

This paper proposes a novel rigorous transformation model for 2D-3D registration to address the difficult problem of obtaining a sufficient number of well-distributed ground control points (GCPs) in urban areas with tall buildings. The proposed model applies two types of geometric constraints, co-planarity and perpendicularity, to the conventional photogrammetric collinearity model. Both types of geometric information are directly obtained from geometric building structures, with which the geometric constraints are automatically created and combined into the conventional transformation model. A test field located in downtown Denver, Colorado, is used to evaluate the accuracy and reliability of the proposed method. The comparison analysis of the accuracy achieved by the proposed method and the conventional method is conducted. Experimental results demonstrated that: (1) the theoretical accuracy of the solved registration parameters can reach 0.47 pixels, whereas the other methods reach only 1.23 and 1.09 pixels; (2) the RMS values of 2D-3D registration achieved by the proposed model are only two pixels along the x and y directions, much smaller than the RMS values of the conventional model, which are approximately 10 pixels along the x and y directions. These results demonstrate that the proposed method is able to significantly improve the accuracy of 2D-3D registration with much fewer GCPs in urban areas with tall buildings.
Millimetre-Wave Backhaul for 5G Networks: Challenges and Solutions
Authors: Feng Wei , Li Yong , Jin Depeng , Su Li , Chen Sheng
Published: June 2016

The trend for dense deployment in future 5G mobile communication networks makes current wired backhaul infeasible owing to the high cost. Millimetre-wave (mm-wave) communication, a promising technique with the capability of providing a multi-gigabit transmission rate, offers a flexible and cost-effective candidate for 5G backhauling. By exploiting highly directional antennas, it becomes practical to cope with explosive traffic demands and to deal with interference problems. Several advancements in physical layer technology, such as hybrid beamforming and full duplexing, bring new challenges and opportunities for mm-wave backhaul. This article introduces a design framework for 5G mm-wave backhaul, including routing, spatial reuse scheduling and physical layer techniques. The associated optimization model, open problems and potential solutions are discussed to fully exploit the throughput gain of the backhaul network. Extensive simulations are conducted to verify the potential benefits of the proposed method for the 5G mm-wave backhaul design.
Efficient Forest Fire Detection Index for Application in Unmanned Aerial Systems (UASs)
Authors: Cruz Henry , Eckert Martina , Meneses Juan , Martínez José-Fernán
Published: June 2016

This article proposes a novel method for detecting forest fires, through the use of a new color index, called the Forest Fire Detection Index (FFDI), developed by the authors. The index is based on methods for vegetation classification and has been adapted to detect the tonalities of flames and smoke; the latter could be included adaptively into the Regions of Interest (RoIs) with the help of a variable factor. Multiple tests have been performed upon database imagery and present promising results: a detection precision of 96.82% has been achieved for image sizes of 960 × 540 pixels at a processing time of 0.0447 seconds. This achievement would lead to a performance of 22 f/s, for smaller images, while up to 54 f/s could be reached by maintaining a similar detection precision. Additional tests have been performed on fires in their early stages, achieving a precision rate of p = 96.62%. The method could be used in real-time in Unmanned Aerial Systems (UASs), with the aim of monitoring a wider area than through fixed surveillance systems. Thus, it would result in more cost-effective outcomes than conventional systems implemented in helicopters or satellites. UASs could also reach inaccessible locations without jeopardizing people’s safety. On-going work includes implementation into a commercially available drone.
A High-Spin Rate Measurement Method for Projectiles Using a Magnetoresistive Sensor Based on Time-Frequency Domain Analysis
Authors: Shang Jianyu , Deng Zhihong , Fu Mengyin , Wang Shunting
Published: June 2016

Traditional artillery guidance can significantly improve the attack accuracy and overall combat efficiency of projectiles, which makes it more adaptable to the information warfare of the future. Obviously, the accurate measurement of artillery spin rate, which has long been regarded as a daunting task, is the basis of precise guidance and control. Magnetoresistive (MR) sensors can be applied to spin rate measurement, especially in the high-spin and high-g projectile launch environment. In this paper, based on the theory of a MR sensor measuring spin rate, the mathematical relationship model between the frequency of MR sensor output and projectile spin rate was established through a fundamental derivation. By analyzing the characteristics of MR sensor output whose frequency varies with time, this paper proposed the Chirp z-Transform (CZT) time-frequency (TF) domain analysis method based on the rolling window of a Blackman window function (BCZT) which can accurately extract the projectile spin rate. To put it into practice, BCZT was applied to measure the spin rate of 155 mm artillery projectile. After extracting the spin rate, the impact that launch rotational angular velocity and aspect angle have on the extraction accuracy of the spin rate was analyzed. Simulation results show that the BCZT TF domain analysis method can effectively and accurately measure the projectile spin rate, especially in a high-spin and high-g projectile launch environment.
Advanced Unsupervised Classification Methods to Detect Anomalies on Earthen Levees Using Polarimetric SAR Imagery
Authors: Marapareddy Ramakalavathi , Aanstoos James , Younan Nicolas
Published: June 2016

Fully polarimetric Synthetic Aperture Radar (polSAR) data analysis has wide applications for terrain and ground cover classification. The dynamics of surface and subsurface water events can lead to slope instability resulting in slough slides on earthen levees. Early detection of these anomalies by a remote sensing approach could save time versus direct assessment. We used L-band Synthetic Aperture Radar (SAR) to screen levees for anomalies. SAR technology, due to its high spatial resolution and soil penetration capability, is a good choice for identifying problematic areas on earthen levees. Using the parameters entropy (H), anisotropy (A), alpha (α), and eigenvalues (λ, λ1, λ2, and λ3), we implemented several unsupervised classification algorithms for the identification of anomalies on the levee. The classification techniques applied are H/α, H/A, A/α, Wishart H/α, Wishart H/A/α, and H/α/λ classification algorithms. In this work, the effectiveness of the algorithms was demonstrated using quad-polarimetric L-band SAR imagery from the NASA Jet Propulsion Laboratory’s (JPL’s) Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR). The study area is a section of the lower Mississippi River valley in the Southern USA, where earthen flood control levees are maintained by the US Army Corps of Engineers.
Analysis of Physiological, Technical, and Tactical Analysis during a Friendly Football Match of Elite U19
Authors: Ortega Juan , Evangelio Carlos , Clemente Filipe , Martins Fernando , González-Víllora Sixto
Published: June 2016

The main objective was to analyze a friendly match of youth elite soccer players identifying the variance of tactical and physiological response parameters during the game. In addition, detecting the impact of both halves on player performance. For the purposes of this study twenty-two U19 players were analyzed playing 11v11. Activity profile, heart rate (HR and HRmax), grouped in five different zones were analyzed via Bluetooth technology, technical performance was analyzed by the Team Sport Assessment Procedure (TSAP), and tactical performance was measured by Social Network Analysis. A comparison of heart rate responses showed significant main effects in the halves (p = 0.001; η p 2 = 0.623). A comparison between tactical position and technical performance had significant main effects (p = 0.001; η p 2 = 0.390). Tactical position showed statistically significant effects on tactical prominence (p = 0.002; η p 2 = 0.296). Therefore, fatigue is a component distinguished in technical/tactical parameters, such as volume of play and efficiency index. Results suggest that fatigue effects may constrain technical performance and, for that reason, the use of instruments to monitor the fatigue effect during matches may be suggested.
Exact and Numerical Solutions of a Spatially-Distributed Mathematical Model for Fluid and Solute Transport in Peritoneal Dialysis
Authors: Cherniha Roman , Gozak Kateryna , Waniewski Jacek
Published: June 2016

The nonlinear mathematical model for solute and fluid transport induced by the osmotic pressure of glucose and albumin with the dependence of several parameters on the hydrostatic pressure is described. In particular, the fractional space available for macromolecules (albumin was used as a typical example) and fractional fluid void volume were assumed to be different functions of hydrostatic pressure. In order to find non-uniform steady-state solutions analytically, some mathematical restrictions on the model parameters were applied. Exact formulae (involving hypergeometric functions) for the density of fluid flux from blood to tissue and the fluid flux across tissues were constructed. In order to justify the applicability of the analytical results obtained, a wide range of numerical simulations were performed. It was found that the analytical formulae can describe with good approximation the fluid and solute transport (especially the rate of ultrafiltration) for a wide range of values of the model parameters.
The role of morphology and coupling of gold nanoparticles in optical breakdown during picosecond pulse exposures
Authors: Davletshin Yevgeniy R , Kumaradas J Carl
Published: June 2016

This paper presents a theoretical study of the interaction of a 6 ps laser pulse with uncoupled and plasmon-coupled gold nanoparticles. We show how the one-dimensional assembly of particles affects the optical breakdown threshold of its surroundings. For this purpose we used a fully coupled electromagnetic, thermodynamic and plasma dynamics model for a laser pulse interaction with gold nanospheres, nanorods and assemblies, which was solved using the finite element method. The thresholds of optical breakdown for off- and on-resonance irradiated gold nanosphere monomers were compared against nanosphere dimers, trimers, and gold nanorods with the same overall size and aspect ratio. The optical breakdown thresholds had a stronger dependence on the optical near-field enhancement than on the mass or absorption cross-section of the nanostructure. These findings can be used to advance the nanoparticle-based nanoscale manipulation of matter.
iPTF SEARCH FOR AN OPTICAL COUNTERPART TO GRAVITATIONAL-WAVE TRANSIENT GW150914
Authors: Kasliwal M. M. , Cenko S. B. , Singer L. P. , Corsi A. , Cao Y. , Barlow T. , Bhalerao V. , Bellm E. , Cook D. , Duggan G. E. , Ferretti R. , Frail D. A. , Horesh A. , Kendrick R. , Kulkarni S. R. , Lunnan R. , Palliyaguru N. , Laher R. , Masci F. , Manulis I. , Miller A. A. , Nugent P. E. , Perley D. , Prince T. A. , Quimby R. M. , Rana J. , Rebbapragada U. , Sesar B. , Singhal A. , Surace J. , Sistine A. Van
Published: June 2016

The intermediate Palomar Transient Factory (iPTF) autonomously responded to and promptly tiled the error region of the first gravitational-wave event GW150914 to search for an optical counterpart. Only a small fraction of the total localized region was immediately visible in the northern night sky, due both to Sun-angle and elevation constraints. Here, we report on the transient candidates identified and rapid follow-up undertaken to determine the nature of each candidate. Even in the small area imaged of 126 deg2, after extensive filtering, eight candidates were deemed worthy of additional follow-up. Within two hours, all eight were spectroscopically classified by the Keck II telescope. Curiously, even though such events are rare, one of our candidates was a superluminous supernova. We obtained radio data with the Jansky Very Large Array and X-ray follow-up with the Swift satellite for this transient. None of our candidates appear to be associated with the gravitational-wave trigger, which is unsurprising given that GW150914 came from the merger of two stellar-mass black holes. This end-to-end discovery and follow-up campaign bodes well for future searches in this post-detection era of gravitational waves.
THE HUNT FOR PLANET NINE: ATMOSPHERE, SPECTRA, EVOLUTION, AND DETECTABILITY
Authors: Fortney Jonathan J. , Marley Mark S. , Laughlin Gregory , Nettelmann Nadine , Morley Caroline V. , Lupu Roxana E. , Visscher Channon , Jeremic Pavle , Khadder Wade G. , Hargrave Mason
Published: June 2016

We investigate the physical characteristics of the solar system’s proposed Planet Nine using modeling tools with a heritage of studying Uranus and Neptune. For a range of plausible masses and interior structures, we find upper limits on the intrinsic

T

eff

, from ∼35 to 50 K for masses of 5–20 M
⊕, and we also explore lower

T

eff

values. Possible planetary radii could readily span from 2.7 to 6 R
⊕, depending on the mass fraction of any H/He envelope. Given its cold atmospheric temperatures, the planet encounters significant methane condensation, which dramatically alters the atmosphere away from simple Neptune-like expectations. We find that the atmosphere is strongly depleted in molecular absorption at visible wavelengths, suggesting a Rayleigh scattering atmosphere with a high geometric albedo approaching 0.75. We highlight two diagnostics for the atmosphere’s temperature structure: (1) the value of the methane mixing ratio above the methane cloud and (2) the wavelength at which cloud scattering can be seen, which yields the cloud-top pressure. Surface reflection may be seen if the atmosphere is thin. Due to collision-induced opacity of H2 in the infrared, the planet would be extremely blue instead of red in the shortest wavelength WISE colors if methane is depleted and would, in some cases, exist on the verge of detectability by WISE. For a range of models, thermal fluxes from ∼3 to 5 μm are ∼20 orders of magnitude larger than blackbody expectations. We report a search of the AllWISE Source Catalog for Planet Nine, but find no detection.
PROCESSO DE TOMADA DE DECISÃO QUANTO À POLÍTICA DE MANUTENÇÃO
Authors: Rodrigues Thiago De Almeida , Seleme Robson , Cleto Marcelo Gechele
Published: June 2016

As organizações atuam em cenários cada vez mais complexos e mutáveis, sendo influenciadas por fatores externos e internos que impactam nas tomadas de decisão. Entre estas, a definição de qual política de manutenção aplicar a determinado equipamento, buscando reduzir os custos e aumentar a eficiência, é de grande importância.  A partir da necessidade de um processo estruturado que identifique as variáveis mais relevantes e detalhe as atividades que devem ser consideradas, definiu-se como objetivo elaborar um processo que auxilie na tomada de decisão quanto a qual política de manutenção aplicar a determinado equipamento. No processo proposto foram consideradas cinco análises para a tomada de decisão, entre elas a análise de custos, segurança, recursos e viabilidade, riscos e meio ambiente, onde cada uma poderá resultar em três possíveis políticas de manutenção sugeridas, a manutenção corretiva, preventiva ou preditiva. O resultado desta pesquisa foi um macro processo estruturado de tomada de decisão quanto à política de manutenção; é importante ressaltar que o processo proposto deve ser alinhado às especificidades da organização, logo, o mesmo serve como referência, levantando questionamentos relevantes à tomada de decisão e direcionando a organização. 
ESTUDO DE SIMULAÇÃO DA RECONFIGURAÇÃO DO LAYOUT LOGÍSTICO PARA REDUÇÃO DE CUSTOS E ELIMINAÇÃO DE GARGALOS
Authors: Bovo Daniel
Published: June 2016

<span style="color: black; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: PT-BR; mso-fareast-language: PT-BR; mso-bidi-language: AR-SA;">Este artigo apresenta um estudo de caso de mudança de layout nas operações logísticas de uma empresa do setor industrial e da simulação de cenários, com seus impactos e propostas de soluções. Devido ao compartilhamento de recursos no processo de carregamento e descarregamento em uma das plantas da empresa, o tempo que cada veículo permanece dentro da unidade (TPV) estava excessivamente alto, impactando no prazo de atendimento ao cliente e gerando volumosos gastos com o pagamento de diárias às transportadoras em função deste tempo elevado, cenário este que poderia piorar consideravelmente devido à expectativa de crescimento da produção para os próximos anos. Assim, a finalidade deste estudo é definir através da simulação qual a melhor configuração dos fluxos inbound e outbound para suportar o crescimento projetado de vendas/operações nos próximos cinco anos e reduzir o tempo de permanência dos veículos dentro planta. Através da simulação, foi possível desenvolver alguns cenários com mudanças de layouts e também com a adição de novos recursos, que geraram reduções de até 70% no TPV e consequentemente nos gastos com diárias, tendo este trabalho como resultado uma série de recomendações para a melhoria da operação.
O NÍVEL DE SERVIÇO DO TECON RIO GRANDE PELA A ÓTICA DE EMPRESAS DA SERRA GAÚCHA: UM ESTUDO LOGITUDINAL 2006-2013
Authors: Vieira Guilherme Bergmann Borges , Gonçalves Roberto Birch , Dorion Eric Charles Henri
Published: June 2016

O presente artigo teve como objetivo identificar e avaliar os atributos competitivos do terminal de contêineres do porto de Rio Grande a partir da ótica dos exportadores e importadores da Serra Gaúcha entre os anos de 2006 e 2013. Situado no extremo sul do Brasil, no estado do Rio Grande do Sul, Rio Grande é o quarto porto brasileiro em toneladas movimentadas e o seu terminal de contêineres (Tecon Rio Grande) ocupa o terceiro lugar no ranking brasileiro em volume de TEUs (unidades equivalentes a vinte pés) movimentados. Além disso, a Serra Gaúcha possui o segundo polo metal mecânico do Brasil, além de outras indústrias importantes, representando quase a quarta parte da movimentação de cargas gerada pelo terminal. No estudo, a avaliação dos respondentes quanto aos diferentes atributos do Tecon Rio Grande foi feita em dois momentos distintos - 2006 e 2013 - e os graus importância dos atributos foram obtidos de forma indireta, por meio de regressão múltipla. Desse modo, foram gerados subsídios relevantes tanto para a melhoria dos serviços por parte do terminal quanto para a (re)avaliação da escolha portuária por parte dos clientes.
ANÁLISE ERGONÔMICA DO TRABALHO CIRURGIÃO DENTISTA - DENTÍSTICA RESTAURADORA - ESTUDO DE CASO
Authors: De Oliveira Maciel Júnior Ari , Catai Rodrigo Eduardo
Published: June 2016

O estudo de caso a seguir foi realizado na sala de atendimento de um consultório odontológico na cidade de Curitiba, Paraná. Utilizando-se dos conceitos da ergonomia, realizou-se a análise ergonômica no local de trabalho do cirurgião dentista e as influências das condições técnicas, ambientais e organizacionais na saúde, qualidade de vida e produtividade do profissional. A metodologia adotada foi baseada nos procedimentos da análise ergonômica do trabalho (conversas e observações sistemáticas) identificando as situações mais danosas à saúde do profissional. Realizou-se o diagnóstico ergonômico bem como recomendações ergonômicas para melhoramento do conforto nas atividades laborais do cirurgião dentista. As posições mais inconfortáveis encontradas foram: sobrecarga de atividades, as tarefas intra-bucais na parte superior da arcada dentária e as distâncias inadequadas dos equipamentos periféricos fotopolimerizador e ultrassom.           Desta forma, seguiram-se as definições ergonômicas e a norma regulamentadora (NR-17), que visa a estabelecer padrões que favoreçam a adaptação das situações de trabalho às características psicofisiológicas dos trabalhadores, de modo a proporcionar um máximo de conforto, segurança e desempenho eficiente.
ACORDO DE NÍVEL DE SERVIÇO PARA MELHORIA DA QUALIDADE NO SUPRIMENTO DE ITENS DE CONSUMO EM UMA INSTITUIÇÃO PÚBLICA DE ENSINO SUPERIOR
Authors: De Sousa Silva Karoline Santiago , Nascimento Santana Armando Vítor , De Oliveira Cardoso Neto Alberto , De Lucena Nunes Denilson Ricardo , Silva Melo André Cristiano
Published: June 2016

O objeto de estudo deste artigo foi uma Instituição de Ensino Superior (IES) pública, que apresenta uma gestão de suprimentos baseada na obtenção do melhor resultado em termos de preço e qualidade, conforme definição da lei brasileira. Segundo a legislação brasileira, o principal parametro na seleção de fornecedores para o setor público é o preço, entretanto, os conceitos de qualidade e nível de serviço vão muito além desse aspecto. Os Acordos de Nível de Serviço (ANS), que permitem exigir dos fornecedores outros aspectos que garantam a qualidade no fornecimento de bens ou serviços. A definição desses aspectos depende do tipo de bens ou serviço prrestado. Dessa forma, este artigo teve a finalidade de propôr parâmetros para um ANS afim de melhorar a qualidade no ressuprimento de materiais de consumo de uma IES pública, bem como fornecer elementos para o monitoramento da eficiência de seus fornecedores. Para tanto, foi realizada uma revisão bibliográfica e entrevistas não estruturadas com pessosas importantes no processo de suprimento da instituição estudada. Como resultado foram propostos indicadores de desempenho relacionados com cada problema típico de suprimento encontrado na IES, além disso foram propostas ações de gestão relacionadas as diferentes faixas de desempenho que os fornecedores podem apresentar.