bluuebunny/crossref_metadata_2025 huggingface dataset:
A nonmonotone modified BFGS algorithm for nonconvex unconstrained optimization problems
Authors: Amini Keyvan , Bahrami Somayeh , Amiri Shadi
Published: June 2016

In this paper, a modified BFGS algorithm is proposed to solve unconstrained
optimization problems. First, based on a modified secant condition, an update
formula is recommended to approximate Hessian matrix. Then thanks to the
remarkable nonmonotone line search properties, an appropriate nonmonotone
idea is employed. Under some mild conditions, the global convergence
properties of the algorithm are established without convexity assumption on
the objective function. Preliminary numerical experiments are also reported
which indicate the promising behavior of the new algorithm.
On the fine spectrum of generalized upper triangular triple-band matrices (Δ2uvw)t over the sequence space l1
Authors: Altundağ Selma , Abay Merve
Published: June 2016

In this work, we determine the fine spectrum of the matrix operator (?2uvw)t
which is defined generalized upper triangular triple band matrix on l1. Also,
we give the approximate point spectrum, defect spectrum and compression
spectrum of the matrix operator (?2uvw)t on l1.
Chemical composition and nutritive potential of Cichorium intybus L. leaves from Montenegro
Authors: Jancic Dejan , Todorovic Vanja , Basic Zorica , Sobajic Sladjana
Published: June 2016

The leaves of chicory (Cichorium intybus L.) plant have been used for
centuries in Montenegro and other Mediterranean countries as a vegetable in
salads, sauces and other types of appetizers and meals. The wild and
cultivated chicory leaves from different location in Montenegro were analysed
regarding several nutrients, major and trace element and vitamin composition
using standard methods of analysis. The results of the study indicated that
chicory leaves were rich in total dietary fiber and mineral content and had
low energy value. Also, they were potential sources of useful nutrients such
as potassium, calcium, manganese, iron, and vitamin A, with the average
content of 391.9, 164.7, 0.55, 2.33 and 0.47 mg / 100 g in fresh leaves,
respectively. Wild plants were superior to the cultivated ones regarding
carbohydrate, calcium and manganese content. Origin of the chicory leaves
significantly influenced most of the analyzed parameters.
Effects of solid poly (ethylene glycols) addition to the solutions of aniline or N,N-dimethylaniline with water: Experimental measurements and modeling
Authors: Soldatovic Danijela , Grozdanic Nikola , Visak Zoran , Radovic Ivona , Kijevcanin Mirjana
Published: June 2016

In this work, the liquid - liquid and solid - liquid phase behaviour of ten
aqueous pseudo-binary and three binary systems containing polyethylene glycol
2050, polyethylene glycol 35000, aniline, N,N-dimethylaniline and water, in
the temperature range T = (298.15 to 350.15) K and at ambient pressure of 0.1
MPa, was studied. The obtained temperature-composition phase diagrams showed
that the only functional co-solvent was PEG2050 for aniline in water, while
PEG35000 even showed a clear anti-solvent effect in the N,N-dimethylaniline
aqueous system. The experimental SLE data have been correlated by the
Non-Random Two-Liquid (NRTL) model, and the correlation results are in
accordance with the experimental results.
Solvatochromism of naringenin in aqueous alcoholic mixtures
Authors: Faraji Mohammad , Farajtabar Ali
Published: June 2016

The spectral change of naringenin was studied by Uv-vis spectrophotometric
method in binary mixtures of water with methanol, ethanol and 1-propanol at
25?C. The effect of solvent was investigated by analysis of electron
transition energy at the maximum absorption wavelength as a function of
Kamlet and Taft parameters of mixtures by means of linear solvation energy
relationships. The nonlinear response of solvatochromism was explained based
on solute-solvent and solvent-solvent interactions. The possible preferential
solvation of naringenin by each of solvents was studied through a modified
preferential solvation model which considers the hydrogen bonding
interactions between the prior solvents due to solvent-solvent interactions.
The preferential solvation parameters and local mole fraction distribution
around the solute were calculated. Results indicate that naringenin prefers
to be more solvated by the complex solvating species and organic solvents
than water.
Association of Weight Loss Maintenance and Weight Regain on 4-Year Changes in CVD Risk Factors: the Action for Health in Diabetes (Look AHEAD) Clinical Trial
Authors:   The Action for Health in Diabetes (Look AHEAD) Study Group
Published: June 2016

OBJECTIVE

Short-term weight loss improves cardiovascular disease (CVD) risk factors. We sought to determine the longer-term effects of maintaining weight loss or, conversely, regaining weight.

RESEARCH DESIGN AND METHODS

We used data from Action for Health in Diabetes (Look AHEAD), a randomized trial of intensive lifestyle intervention (ILI) compared to a control condition in overweight/obese individuals with type 2 diabetes. ILI participants were grouped according to weight change patterns, as follows: 1) no weight loss (±3% at years 1 and 4); 2) moderate weight loss (3–8% at years 1 and 4); 3) large weight loss (8–20% at years 1 and 4); 4) moderate loss/full regain (3–8% at year 1/±3% at year 4); 5) large loss/full regain (8–20% at year 1/± 3% year 4); and 6) large loss/partial regain (8–20% at year 1/3–8% at year 4) and changes in CVD risk factors were compared.

RESULTS

Adjusting for baseline differences and medication use, larger weight losses produced greater improvements in HbA1c, systolic blood pressure, HDL cholesterol, and triglycerides at years 1 and 4 (all P ≤ 0.02). Despite maintenance of weight loss, HbA1c levels worsened between years 1 and 4, and remained below baseline only in those with large weight losses. We found no negative associations of losing and regaining weight relative to not having lost weight. Moreover, those who had large initial weight loss but full regain of weight had greater improvements in HbA1c levels at year 4 than those with smaller or no initial weight loss.

CONCLUSIONS

Larger initial weight loss should be encouraged in individuals with type 2 diabetes, despite the possibility of regain.
Book Review: Birds of the Middle East, R. F. Porter, S. Christensen, P.
Schiermacker-Hanson
Authors: Scarnecchia David L. ,   Society for Range
                        Management
Published: June 2016

Book Review: Birds of the Middle East, R. F. Porter, S. Christensen, P.
Schiermacker-Hanson. Princeton University Press, Princeton, NJ
(2004).
Inference of Animal Activity From GPS Collar Data on Free-Ranging Cattle
Authors: Ungar Eugene D. , Henkin Zalmen , Gutman Mario ,   Society for Range Management
Published: June 2016

Global positioning systems (GPSs) enable continuous and automatic tracking of an animal’s position. The value of such spatial-temporal information can be improved if the corresponding activity of the animal is known. We evaluated the potential of Lotek GPS collars to predict activity of beef cattle on extensive rangeland in 2 contrasting foraging environments. Collars were configured to record animal location at intervals of 20 minutes (United States) or 5 minutes (Israel), together with counts from 2 motion sensors. Synchronized field observations of collared cows were conducted in 1999 (United States) and in 2002 and 2003 (Israel). Grazing, traveling (without grazing), and resting activities were recorded as minutes out of 20 for each category (United States), or as a single category (Israel). For the US data, stepwise regression models of grazing, traveling, and resting time accounted for 74%-84% of the variation, on the basis of the motion sensor counts for the left-right axis and the distances between GPS fixes. Regression tree analysis of grazing time yielded a simple model (4 splits) that accounted for 85% of the variation. For the Israeli data, the misclassification rates obtained by discriminant analysis and classification tree analysis of animal activity were 14% and 12%, respectively. In both analyses, almost all grazing observations were correctly classified, but other activities were sometimes misclassified as grazing. Distance alone is a poor indicator of animal activity, but grazing, traveling,and resting activities of free-ranging cattle can be inferred with reasonable accuracy from data provided by Lotek GPS collars.
Fourwing Saltbush Seed Yield and Quality: Irrigation, Fertilization, and Ecotype Effects
Authors: Petersen Joseph L. , Ueckert Darrell N. ,   Society for Range Management
Published: June 2016

Clones of superior pollen- and seed-producing plants of 4 fourwing saltbush (Atriplex canescens [Pursh] Nutt.) ecotypes were planted in a seed orchard in west-central Texas to determine if seed production and quality could be enhanced by irrigation and fertilization. Subplots of nitrogen (N) at 112 kg ha-1, phosphorous (P) at 112 kg ha-1, N + P at 112 + 112 kg ha-1, or no fertilizer were superimposed on irrigated or dryland main-plots. Neither irrigation nor fertilization affected estimated seed yields or utricle fill during the third growing season after planting. Fertilization did not affect seed germination of any of the saltbush ecotypes on irrigated plots or that of the 2 more xeric ecotypes (Grandfalls and Valentine) on dryland plots. Fertilizer N on dryland plots increased germination of the San Angelo ecotype, and N + P increased germination of the Texon ecotype. Estimated gross value of the first seed crop was about 4648~ha-1 even though the superior reproductive traits of parental pistillate plants were poorly expressed by the clones. Fertilization did not affect estimated seed yields in irrigated plots, but N and N + P increased seed yields in dryland plots in the fourth growing season. Fertilization effects on seed weights varied among irrigated and dryland plots and among saltbush ecotypes. Mortality of the shrubs during the period extending from 1988 to 1990 was not affected by irrigation or fertilization but increased among ecotypes as the xeric nature of their sites of origin increased and as the distance of their sites of origin from the seed orchard increased. Evidence from this study did not strongly support cloning, irrigation, or fertilization for improving seed harvests of fourwing saltbush in west-central Texas.
Treatment of Progressive First Metatarsophalangeal Hallux Valgus Deformity: A Biomechanically Based Muscle-Strengthening Approach
Authors: Glasoe Ward M.
Published: June 2016

Synopsis

Hallux valgus is a progressive deformity of the first metatarsophalangeal joint that changes the anatomy and biomechanics of the foot. To date, surgery is the only treatment to correct this deformity, though the recurrence rate is as high as 15%. This clinical commentary provides instruction in a strengthening approach for treatment of hallux valgus deformity, by addressing the moment actions of 5 muscles identified as having the ability to counter the hallux valgus process. Unlike surgery, muscle strengthening does not correct the deformity, but, instead, reduces the pain and associated gait impairments that affect the mobility of people who live with the disorder. This review is organized in 4 parts. Part 1 defines the terms of foot motion and posture. Part 2 details the anatomy and biomechanics, and describes how the foot is changed with deformity. Part 3 details the muscles targeted for strengthening; the intrinsics being the abductor hallucis, adductor hallucis, and the flexor hallucis brevis; the extrinsics being the tibialis posterior and fibularis longus. Part 4 instructs the exercise and reviews the related literature. Instructions are given for the short-foot, the toe-spread-out, and the heel-raise exercises. The routine may be performed by almost anyone at home and may be adopted into physical therapist practice, with intent to strengthen the foot muscles as an adjunct to almost any protocol of care, but especially for the treatment of hallux valgus deformity. J Orthop Sports Phys Ther 2016;46(7):596–605. Epub 6 Jun 2016. doi:10.2519/jospt.2016.6704
Revisiting the Relationship Between International Assessment Outcomes and Educational Production
Authors: Carnoy Martin , Khavenson Tatiana , Loyalka Prashant , Schmidt William H. , Zakharov Andrey
Published: June 2016

International assessments, such as the Program for International Student Assessment (PISA), are being used to recommend educational policies to improve student achievement. This study shows that the cross-sectional estimates behind such recommendations may be biased. We use a unique data set from one country that applied the PISA mathematics test in 2012 in ninth grade to all students who had taken the Trends in International Mathematics and Science Survey (TIMSS) test in 2011 and collected information on students’ teachers in ninth grade. These data allowed us to more precisely estimate the effects of classroom variables on students’ PISA performance. Our results suggest that the positive roles of teacher “quality” and “opportunity to learn” in improving student performance are much more modest than claimed in PISA documents.
Morphological Characterization of Railroad Ballast Degradation Trends in the Field and Laboratory
Authors: Moaveni Maziar , Qian Yu , Qamhia Issam I. A. , Tutumluer Erol , Basye Colin , Li Dingqing
Published: June 2016

Field and laboratory degradation trends of railroad ballast are investigated in this paper by using an aggregate image analysis approach. In addition to gradation changes, in-service ballast materials undergo degradation of particle shape properties (i.e., angularity, flatness and elongation, and surface texture), which can be quantified through imaging techniques. In the field, five ballast types were installed in eight steel boxes at a test section in the western heavy axle load revenue service test megasite near Ogallala, Nebraska. In-service performance evaluations consisted of sampling, sieving, and imaging-based shape property analyses of the field-collected ballast materials to monitor degradation twice a year. In the laboratory, following the Los Angeles (LA) abrasion test procedure, a sample of granite ballast was tested at increasing numbers of LA abrasion drum turns to assess changes in gradations and study degradation levels. All of the LA abrasion–tested granite samples and approximately 3,000 particles from the different sizes of the field-monitored ballast materials were collected and scanned with the Enhanced University of Illinois Aggregate Image Analyzer. Imaging-based particle shape indexes were determined at different degradation levels from both the LA abrasion and the field projects. The magnitudes and rates of measured degradation and breakage, as well as the captured changes in morphological properties of particles, were quite different between the LA abrasion test and the field degradation from repeated traffic loading. A comprehensive study with improved ballast sampling and testing techniques is recommended to further investigate mechanisms of ballast degradation.
Rehabilitation of Railway–Highway At-Grade Crossings: Recommendations and Guides
Authors: Malloy Brett R. , Rose Jerry G. , Souleyrette Reginald R.
Published: June 2016

Railway–highway at-grade crossing surface management involves selecting the most cost-effective rehabilitation technique that will provide safe, smooth, high-performance, long-life, serviceable crossings for highway vehicles and pedestrians. This paper offers step-by-step guidance to see a project from its preproject planning stage, through its implementation and rehabilitation activities, and on to postconstruction management. Preproject administration entails ( a) reviewing historical accident and maintenance cost data for the crossing, ( b) determining the optimal rehabilitation method using an intuitive decision option diagram, ( c) categorizing and separating major work and cost items, ( d) calculating unit costs for the major work and cost items, ( e) evaluating the cost-effectiveness of various alternatives, and ( f) selecting a design that meets applicable criteria for the governmental agency. Rehabilitation activities include executing the design according to the chosen specifications. Depending on the outcome of preproject administration, this process may simply involve adjusting and improving the highway pavement approaches, which does not impinge on the other aspects of the crossing. If only the crossing surface has deteriorated, removing and replacing the crossing surface material may be necessary. However, if it is obvious that the crossing’s structural support is insufficient for the loadings, removing and replacing the structural sublayers, track, and crossing surface will be required. Postproject administration occurs after the project’s completion. This phase begins with postinstallation inspection, which can uncover most problems. With this guidance, a public agency or railroad is more likely to be assured of obtaining a safe, smooth, cost-effective, economical crossing with long service life.
A constraint programming scheduling solver for the MPOpt programming environment
Authors: Bonfietti Alessio
Published: June 2016

As the number of processors integrated on a single chip increases with the fast pace dictated by Moore’s Law, multi-core systems-on-chip (MPSoCs) are becoming truly distributed systems at the micro-scale. From the application viewpoint, requirements for high performance and low power have increased at a breakneck speed in many embedded computing domains like wireless communication, audio and video processing. Applications in these areas are highly parallelizable and feature significant functional parallelism. In the past decades several programming models and tools aimed at easing the task of efficiently coding and mapping parallel applications. Most of them are tied to a specific platform or find far from optimal solutions due to the hardness of the allocation and scheduling problem. In this paper we presents (1) a Constraint Programming-based solver generating optimal scheduling and mapping decisions for such applications, optimized for maximal throughput, and (2) the framework used to validate the solver on a real multicore platform.
Designing, simulations and experiments of a passive permanent magnet bearing
Authors: Rodriguez Elkin , Sotelo Guilherme G. , de Oliveira Janaína G. , Santiago Juan de , Rossander Morgan , Stephan Richard M.
Published: June 2016

This paper presents simulations and experimental results for two types of Passive Permanent Magnet Bearings. The bearing system under investigation consists of two permanent magnet rings opposing to each other in two different configurations. The influence of parameters, such as thickness and radius of permanent magnets, in the force is presented through FEM calculations. Two setups of passive magnetic bearings have been built. Static measurements of radial and axial forces are reported and results compared with simulations. Also, dynamic tests show the behavior of the bearing and the magnitudes of force in the foothold. The results are presented to show trends in the parameters, so the conclusions are applicable for other sizes and applications. As an example, the application as a top bearing for a 12 kW vertical axis wind turbine is considered.
Investigation into the Catalytic Activity of Microporous and Mesoporous Catalysts in the Pyrolysis of Waste Polyethylene and Polypropylene Mixture
Authors: Li Kaixin , Lee Shao , Yuan Guoan , Lei Junxi , Lin Shengxuan , Weerachanchai Piyarat , Yang Yanhui , Wang Jing-Yuan
Published: June 2016

Catalytic pyrolysis behavior of synthesized microporous catalysts (conventional Zeolite Socony Mobil–5 (C-ZSM-5), highly uniform nanocrystalline ZSM-5 (HUN-ZSM-5) and β-zeolite), Mesoporous catalysts (highly hydrothermally stable Al-MCM-41 with accessible void defects (Al-MCM-41(hhs)), Kanemite-derived folded silica (KFS-16B) and well-ordered Al-SBA-15 (Al-SBA-15(wo)) were studied with waste polyethylene (PE) and polypropylene (PP) mixture which are the main constituents in municipal solid waste. All the catalysts were characterized by Brunauer-Emmett-Teller (BET), X-ray powder diffraction (XRD), and NH3-temperature programmed desorption (TPD). The results demonstrated that microporous catalysts exhibited high yields of gas products and high selectivity for aromatics and alkene, whereas the mesoporous catalysts showed high yields of liquid products with considerable amounts of aliphatic compounds. The differences between the microporous and mesoporous catalysts could be attributed to their characteristic acidic and textural properties. A significant amount of C2–C4 gases were produced from both types of catalysts. The composition of the liquid and gas products from catalytic pyrolysis is similar to petroleum-derived fuels. In other words, products of catalytic pyrolysis of plastic waste can be potential alternatives to the petroleum-derived fuels.
Viral Suppression and Resistance in a Cohort of Perinatally-HIV Infected (PHIV+) Pregnant Women
Authors: Cruz Maria , Santos Edwiges , Benamor Teixeira Maria , Poletti Monica , Sousa Carolina , Gouvea Maria , Nielsen-Saines Karin , João Esaú
Published: June 2016

Our objective was to describe viral suppression and antiretroviral (ARV) resistance mutations in an ongoing cohort of perinatally-infected HIV+ (PHIV+) pregnant women. Descriptive analysis was performed using SPSS 18.0. From 2011 to 2014, we followed 22 PHIV+ pregnant women. Median age at prenatal entry was 19 years (Interquartile range (IQR) 17.6–21.0); 86% had an AIDS diagnosis; 81% had disclosed their HIV status to partner 11. The median age at HIV diagnosis was 8.3 y (IQR 4.0–13.6), the median age at sexual debut was 16 years (IQR 14–18). At the time of prenatal care initiation, four (18%) were on their first antiretroviral treatment (ART), eight (36%) in their second regimen and nine (41%) in their third regimen or beyond, and one had no data. Seventeen of 22 (77%) had HIV-viral load (VL) > 50 copies/mL at prenatal care entry, 16 had a genotyping exam performed. Seventeen of 22 PHIV+ had VL results near delivery: 7/17 (41%) had VL < 50 copies/mL. Among those who had genotyping at prenatal entry, 11/16 (69%) had mutations associated with ARV resistance. The most frequent major mutations were K103N, M184V, T215, M41L, D67N at reverse transcriptase gene and M46, I54V and V82A at protease gene. No vertical transmissions occurred. Management of pregnancy among PHIV+ is challenging. Individualized ART are needed to achieve viral suppression in a highly ART-exposed subpopulation.
Modelling of Radiological Health Risks from Gold Mine Tailings in Wonderfonteinspruit Catchment Area, South Africa
Authors: Mathuthu Manny , Kamunda Caspah , Madhuku Morgan
Published: June 2016

Mining is one of the major causes of elevation of naturally-occurring radionuclide material (NORM) concentrations on the Earth’s surface. The aim of this study was to evaluate the human risk associated with exposure to NORMs in soils from mine tailings around a gold mine. A broad-energy germanium detector was used to measure activity concentrations of these NORMs in 66 soil samples (56 from five mine tailings and 10 from the control area). The RESidual RADioactivity (RESRAD) OFFSITE modeling program (version 3.1) was then used to estimate the radiation doses and the cancer morbidity risk of uranium-238 (238U), thorium-232 (232Th), and potassium-40 (40K) for a hypothetical resident scenario. According to RESRAD prediction, the maximum total effective dose equivalent (TEDE) during 100 years was found to be 0.0315 mSv/year at year 30, while the maximum total excess cancer morbidity risk for all the pathways was 3.04 × 10−5 at year 15. The US Environmental Protection Agency considers acceptable for regulatory purposes a cancer risk in the range of 10−6 to 10−4. Therefore, results obtained from RESRAD OFFSITE code has shown that the health risk from gold mine tailings is within acceptable levels according to international standards.
Isoquercitrin Esters with Mono- or Dicarboxylic Acids: Enzymatic Preparation and Properties
Authors: Vavříková Eva , Langschwager Fanny , Jezova-Kalachova Lubica , Křenková Alena , Mikulová Barbora , Kuzma Marek , Křen Vladimír , Valentová Kateřina
Published: June 2016

A series of isoquercitrin (quercetin-3-O-β-d-glucopyranoside) esters with mono- or dicarboxylic acids was designed to modulate hydro- and lipophilicity and biological properties. Esterification of isoquercitrin was accomplished by direct chemoenzymatic reaction using Novozym 435 (lipase from Candida antarctica), which accepted C5- to C12-dicarboxylic acids; the shorter ones, such as oxalic (C2), malonic (C3), succinic (C4) and maleic (C4) acids were not substrates of the lipase. Lipophilicity of monocarboxylic acid derivatives, measured as log P, increased with the chain length. Esters with glutaric and adipic acids exhibited hydrophilicity, and the dodecanedioic acid hemiester was more lipophilic. All derivatives were less able to reduce Folin–Ciocalteau reagent (FCR) and scavenge DPPH (1,1-diphenyl-2-picrylhydrazyl) than isoquercitrin; ABTS (2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)) radical-scavenging activity was comparable. Dodecanoate and palmitate were the least active in FCR and ABTS scavenging; dodecanoate and hemiglutarate were the strongest DPPH scavengers. In contrast, most derivatives were much better inhibitors of microsomal lipoperoxidation than isoquercitrin; butyrate and hexanoate were the most efficient. Anti-lipoperoxidant activity of monocarboxylic derivatives, except acetates, decreased with increasing aliphatic chain. The opposite trend was noted for dicarboxylic acid hemiesters, isoquercitrin hemidodecanedioate being the most active. Overall, IQ butyrate, hexanoate and hemidodecanedioate are the most promising candidates for further studies.
Chemical Characterization and in Vitro Antibacterial Activity of Myrcianthes hallii (O. Berg) McVaugh (Myrtaceae), a Traditional Plant Growing in Ecuador
Authors: Chavez Carvajal Patricia , Coppo Erika , Di Lorenzo Arianna , Gozzini Davide , Bracco Francesco , Zanoni Giuseppe , Nabavi Seyed , Marchese Anna , Arciola Carla , Daglia Maria
Published: June 2016

Myrcianthes hallii (O. Berg) McVaugh (Myrtaceae) is a plant native to Ecuador, traditionally used for its antiseptic properties. The composition of the hydro-methanolic extract of this plant was determined by submitting it to ultra-high performance liquid chromatography (UHPLC) hyphenated to heated-electrospray ionization mass spectrometry and UV detection. The presence of antimicrobial components prompted us to test the extract against methicillin-resistant and methicillin-susceptible Staphylococcus aureus, multidrug-resistant and susceptible Escherichia coli, Pseudomonas aeruginosa, Enterococcus spp. and Streptococcus pyogenes strains. The chromatographic analysis led to the identification of 38 compounds, including polyphenols and organic acids, and represents the first chemical characterization of this plant. The extract showed modest antibacterial activity against all tested bacteria, with the exception of E. coli which was found to be less sensitive. Whilst methicillin-resistant strains usually display resistance to several drugs, no relevant differences were observed between methicillin-susceptible and resistant strains. Considering its long-standing use in folk medicine, which suggests the relative safety of the plant, and the presence of many known antibacterial polyphenolic compounds responsible for its antibacterial activity, the results show that M. hallii extract could be used as a potential new antiseptic agent. Moreover, new anti-infective biomaterials and nanomaterials could be designed through the incorporation of M. hallii polyphenols. This prospective biomedical application is also discussed.
IBM-1 Calculations on the Even-Even 122-128Te Isotopes
Authors: Küçükbursa Atalay , Manisa Kaan , Çiftçi Mehmet , Babacan Tahsin , Maraş İsmail
Published: June 2016

The 122-128Te isotopes in O(6)- SU(5) transition region were investigated. For these nuclei, the energy levels, B(E2) transition probabilities, and d(E2/M1) mixing ratios were calculated within framework of the Interacting Boson Model (IBM-1). The results are compared with the experimental data and the previous calculations. It is shown that there is a good agreement between the results found and especially with the experimental ones.
Monte Carlo Simulation for Electron Dynamics in Semiconductor Devices
Authors: Akarsu Mustafa , Özbaş Ömer
Published: June 2016

The single-particle Monte Carlo simulation for the electron transport in semiconductor devices is presented. The Monte Carlo method is briefly compared with alternative theoretical techniques. Flowchart of the simulation program is given and selections of free flight time, scattering mechanism and electron wave vector are explained. Determination of mean electron velocity and energy is presented.
Neural Network Classification of EEG Signals by Using AR with MLE Preprocessing for Epileptic Seizure Detection
Authors: Subasi Abdulhamit , Kiymik M. , Alkan Ahmet , Koklukaya Etem
Published: June 2016

The purpose of the work described in this paper is to investigate the use of autoregressive (AR) model by using maximum likelihood estimation (MLE) also interpretation and performance of this method to extract classifiable features from human electroencephalogram (EEG) by using Artificial Neural Networks (ANNs). ANNs are evaluated for accuracy, specificity, and sensitivity on classification of each patient into the correct two-group categorization: epileptic seizure or non-epileptic seizure. It is observed that, ANN classification of EEG signals with AR gives better results and these results can also be used for detecting epileptic seizure.
Null Generalized Helices in L3 and L4, 3 and 4-Dimensional Lorentzian Space
Authors: Yalınız Ayse , Hacısalihoğlu H.
Published: June 2016

In this paper we obtain the harmonic curvatures of a null generalized helix in L3 and L4 , 3 and 4-dimensional Lorentzian spaces. Thus we another definitions of null generalized helix in terms of harmonic curvatures. Also we find the relation of between Frenet frame, slope axis and curvature functions 1 k , 2 k of null generalized helix. Finally we characterize the null helices thanks to harmonic curvatures in L3 and L4 , 3 and 4- dimensional Lorentzian space.
A New Modified Goodness of Fit Tests for Type 2 Censored Sample from Normal Population
Authors: Sultan Ahmed , Khaleel Hala
Published: June 2016

In this paper a procedure is considered for a new modified goodness of fit test for the normal type2 censored population. Samples of sizes 10(10)60 are chosen and censored at a specified percentage. Cramer von Mises and Anderson Darling test statistics are used with a nonparametric density estimator in place of the empirical distribution function. Tables of critical values for the two tests are generated. The power of the tests for nine alternative distributions is shown. Results show high power of discriminating the alternatives.
Similarity Reduction of Energy-Transport Models for Semiconductors
Authors: Molati M. , Soh C.
Published: June 2016

The main purpose of this work is to perform symmetry classification of a system of partial differential equations for energy-transport in semiconductors. In the case where there are symmetries, they are used to reduce the number of independent variables which in turn enables one to construct invariant solutions. Invariant solutions of a given equation satisfy an equation with fewer independent variables. Thus, the search of invariant solutions can be viewed as a sort of dimensional reduction. From a computational standpoint, the reduced system is easier to analyse both numerically and analytically than the original system.
Quality Function Deployment Approach to Satisfying Customers Demands and an Implementation at Shoes Company
Authors: Baraçlı Hayri , Gülsün Bahadir , Güneri Ali
Published: June 2016

In our developing world, to produce high quality product and deliver these products to the customers are carried on. From this point of view, producing quality products is very important for the continuity of business companies. In manufacturing systems, considering customer demands means broadening marketshore. Customer demands are valid from designing product to the services. If the business enterprise completes these processes it will be called successful. To reflect the customer demands to the product, we use a technique called Quality Function Deployment. In this study, some basic definitions of the Quality Function Deployment are given and initial data for the implementation will be expressed.
The Lifts of Langrange and Hamilton Equations to the Extended Vecor Bundles
Authors: Civalek Şevket
Published: June 2016

In this study, the vertical and complete lifts of Lagrange and Hamilton equations on the extended vector bundle have been given. Furthermore, some results on higher order mechanical systems on the extended vector bundles have been obtained.
Torsional Stresses in the Transverse Fillet Weld Tubular Joints
Authors: Günay Durmuş , Aydemir Alpay , Özer Halil
Published: June 2016

Torsional stresses, τrθ and τθz, in the transverse fillet tubular weld joint subjected to torsional load have been analyzed by the finite element method using triangular and quadrilateral izoparametric axisymmetric fourier type torus finite elements. There is an axisymmetry with respect to geometry and material properties but no axisymmetry with respect to the loading. With respect to material properties, two kinds of joints are considered in the study. One consists of steel tubes and steel weld material, the other steel tubes and brass weld material. All of the materials used are assumed linear-elastic. Changing the torsional stresses, along the weld legs and the weld throat, are plotted in dimensionless coordinates.
Algebraic Approach to Transformations on Hypercube System
Authors: Kahramanlı Ş. , Allahverdi N.
Published: June 2016

In this study some algebraic transformations on hypercube system are proposed. The presented transformations of forbidden subcubes provide defining set of all maximal and nonfaulty subcubes, and subset of minimal and nonfaulty subcubes included certain given vertices. It provides formal and simple findings of all the current sources and targets of information, and also the pathways between them. The correctness of all these transformations is proved by the aid of three theorems. In the proposed transformations there were three special operations of cube algebra applied, as subtraction, product and intersection on coordinates.
Dynamic Behavior of a Stiffened Laminated Conical Shell under Hygrothermal Loads
Authors: Mecitoğlu Zahit , Örenel Hasan
Published: June 2016

The dynamic behavior of a stiffened composite laminated conical thin shell under hygrothermal loads is studied numerically. The governing equations of truncated conical shell are based on the Donnell-Mushtari theory of thin shells including the transverse shear deformation and rotary inertia. The extension-bending coupling is taken into account in the equations. The composite laminated conical shell is also reinforced at uniform intervals by elastic rings andlor stringers. The stiffening elements are relatively closely spaced, and therefore the stiffeners are "smeared out" along the conical shell. The inhomogeneity of material properties because of moisture and temperature is taken into account in the constitutive equations. The equations of laminated composite conical shell are solved by the use of finite difference method The effect of moisture is examined on the dynanlic behavior. The accuracy of results is tested by certain earlier results and an agreement is found.
Dynamic Response of Composite Cylindrical Shells to Shock Loading
Authors: Soykasap Ömer , Mecitoğlu Zahit , Borat Oğuz
Published: June 2016

In this paper, dynamic response of composite cylindrical shells subjected to shock loading is studied analytically. The equations of motion are based on Sanders theory of thin shell. The effects of transverse shear deformation and rotatory inertia are taken into account. The circular cylindrical thin shell with simply supported ends is subjected to a shock load, represented by an axially symmetric moving load at a constant speed along the longitudinal direction. The governing equations are solved analytically using the Assumed-Modes Method. The influences of geometrical parameters and composite material properties of circular cylindrical shells on the dynamic response are studied.
E2/M1 Multipole Mixing Ratios of 162Dy Nucleus in Rotation Vibration Model
Authors: Baylan Mehmet , Uluer İhsan , Küçükbursa Atalay , Maraş İsmail
Published: June 2016

The extended rotation-vibration model containing different deformations for protons and neutrons is applied to 162Dy nucleus. The mixing ratios we obtained for the E2/Ml transitions are in reasanably good agreement with previous experimental and theoretical values.
On the Partial Generalization of the Measure of Transcendence of Some Formal Laurent Series
Authors: Özdemir Ahmet
Published: June 2016

In this work, we determine the trallscendence measure of the formal Laurent series "that" [...]
The Study Mapping for Directed Space-Like and Time-Like in Minkowski 3-Space R13
Authors: Uğurlu H. , Çalışkan Ali
Published: June 2016

In this study, the E. Study mapping was dermed for the space-like and time-like lines in the Minkowski 3-space R13. Hence, there is one to one correspondence between directed space-like (resp., time-like) lines of R13 and ordered pair of vectors (a,a0.) such that < a,a> = 1 (resp., < a,a> = -1) and  = 0.
The Finite Element Analysis of Buckling of Laminated Rectangular Reinforced Concrete Plates with Circular Hole
Authors: Tekin Muhammed , Altan M.
Published: June 2016

In this investigation an approach buclcling analysis for simply supported rectangular reinforced concrete plates under uniaxial compression are developed. The objective of this investigation is to compare buclcling load of the reinforced plate with circular hole and without hole. A laminated composite plate is considered.The finite element models for with central circular hole and without hole are designed. The composite materials and composite laminates materials approach are discussed. The solution of the problem by computer program coded in FORTRAN is explained and numerical example is given.
Using the Growth Models for Optimization of Energy Distributions Systems
Authors: Pekiner Fahri
Published: June 2016

Energy distribution systems were developed in the recent years due to increasing
population, new technologies and load demand. Alternative technical arrangements are
made trouble to choose the best construction. On the other hand, system costs are
affected for the new design and operating. That is, for a new distribution design or
operation of an exist syatem, both technical and economical constraints must be consider. [...]
In-Plane Vibrations of Circular Curved Beams with a Transverse Open Crack
Authors: Öz H. R. , Daş M. T.
Published: June 2016

In this study, the in plane vibrations of cracked circular curved beams is investigated. The beam is an Euler-Bernoulli beam. Only bending and extension effects are included. The curvature is in a single plane. In plane vibrations is analyzed using FEM. In the analysis, elongation, bending and rotary inertia effects are included. Four degrees of freedom for in-plane vibrations is assumed. Natural frequencies of the beam with a crack in different locations and depths are calculated using FEM. Comparisons are made for different angles.
Thermal Shock Problem for One Dimensional Generalized Thermoelastic Layered Composite Material
Authors: El-Bary A. A. , Youssef H. M.
Published: June 2016

The dynamic treatment of one-dimensional generalized thermoelastic problem of heat conduction is made for a layered thin plate, which is exposed, to a uniform thermal shock. The basic equations are transformed by Laplace transform and solved by a direct method. The solution was applied for a plate of sandwich structure. The inverses of Laplace transforms are obtained numerically. The temperature, the stress and the displacement distributions are represented in graphs, which show the coupled and the generalized cases.
A Classification Methodology for Color Textures Using Multispectral Random Field Mathematical Models
Authors: Khotanzad Alireza , Bennett Jesse , Hernandez Orlando
Published: June 2016

A large number of texture classification approaches have been developed in the past but most of these studies target gray-level textures. In this paper, supervised classification of color textures is considered. Several different Multispectral Random Field models are used to characterize the texture. The classifying features are based on the estimated parameters of these model and functions defined on them. The approach is tested on a database of sixteen different color textures. A near 100% classification accuracy is achieved. The advantage of utilizing color information is demonstrated by converting color textures to gray-level ones and classifying them using gray-level random field models. It is shown that color based classification is significantly more accurate than its gray-level counterpart.
Sensitivity Analysis of General Mixed Multivalued Mildly Nonlinear Variational Inequalities
Authors: Salahuddin Salahuddin
Published: June 2016

Dafermos [1] studied the sensitivity properties of solutions of a variational inequality with respect to a parameter y. In this paper, we extend this analysis for general mixed multivalued mildly nonlinear variational inequalities in the setting of Hilbert spaces.
Estimation of Hourly Mean Ambient Temperatures with Artificial Neural Networks
Authors: Dombaycı Ömer , Çivril Önder
Published: June 2016

In this study, the artificial neural networks have been used for the estimation of hourly ambient temperature in Denizli, Turkey. The model was trained and tested with four years (2002-2005) of hourly mean temperature values. The hourly temperature values for the years 2002-2004 were used in training phase, the values for the year 2005 were used to test the model. The architecture of the ANN model was the multi-layer feedforward architecture and has three layers. Inputs of the network were month, day, hour, and two hourly mean temperatures at the previous hours, and the output was the mean temperature at the hour specified in the input. In the model, Levenberg-Marquardt learning algorithm which is a variant of backpropagation was used. With the software developed in Matlab, an ANN was constructed, trained, and tested for a different number of neurons in its hidden layer. The best result was obtained for 27 neurons, where R2, RMSE and MAPE values were found to be 0.99999, 0.92024 and 0.20900% for training, and 0.9999, 0.91301 and 0.20907% for test. The results show that the artificial neural network is powerful an alternate method in temperature estimations.
A New Method for Extracting 3D Solid Models of Objects Using 2D Technical Drawings
Authors: Çayıroglu İbrahim , Çavusoglu Abdullah , Çelik Veli
Published: June 2016

In this study, a new method called “3D-Space” have been developed to obtain 3D models of prismatic machine parts using 2D technical drawings. The algorithm basicaly works in the following manner: 3 basic views (i.e. top, front, left side) of an object are supplied as inputs while the output is a 3D solid view of corresponding object. To start with a raw bounding box spatially big enough to contain the complete final object is taken. Following the operations executed on it, the result is the 3D solid view of the 2D drawings. The basic views of the object are used to determine the nature of the operation to be applied on the raw entity. A feedback mechanism is also incorporated into the system to check the correctness of the final product. The results show that in most of the cases the algorithm works as expected. However there are some restrictions which are given in the text.
An Approximate Method for Free Vibration Analysis of Multi-Bay Coupled Shear Walls
Authors: Bozdogan Kanat , Öztürk Duygu
Published: June 2016

In this study, an approximate method based on the continuum approach and transfer matrix method for free vibration analysis of multi bay coupled shear walls is presented. In this method the whole structure is idealized as sandwich beam. Initially the differential equation of this equivalent sandwich beam is written then shape function for each storey can be obtained by the solution of differential equations. By using boundary conditions and storey transfer matrices which are obtained by these shape functions, system modes and periods can be calculated. Reliability of the study is shown with a few examples. A computer program has been prepared in MATLAB computer algebra system and numerical samples have been solved for demonstration of the reliability of the method. The results of the samples display the convergence of the present method to the other methods used in literature.
A Root-Finding Algorithm with Fifth Order Derivatives
Authors: Pakdemirli M. , Boyacı H. , Yurtsever H.
Published: June 2016

Perturbation theory is used to generate a root finding algorithm with fifth order derivatives. The algorithm is called Quintuple-Correction-Term algorithm. The new algorithm is contrasted with the previous Quadruple-Correction-Term and Triple-Correction-Term algorithms in the literature. It is found that adding a fifth correction term in the algorithm does not improve the performance.
A New Perturbation Algorithm With Better Convergence Properties: Multiple Scales Lindstedt Poincare Method
Authors: Pakdemirli M. , Karahan M. M. F. , Boyacı H.
Published: June 2016

A new perturbation algorithm combining the Method of Multiple Scales and Lindstedt-Poincare techniques is proposed for the first time. The algorithm combines the advantages of both methods. Convergence to real solutions with large perturbation parameters can be achieved for both constant amplitude and variable amplitude cases. Three problems are solved: Linear damped vibration equation, classical duffing equation and damped cubic nonlinear equation. Results of Multiple Scales, new method and numerical solutions are contrasted. The proposed new method produces better results for strong nonlinearities.
Profit Maximization Multi-item Inventory Models Considering Trade Credit and Sales Learning Curve
Authors: Tsao Yu-Chung
Published: June 2016

In this paper we consider a multi-item distribution channel subject to supplier’s credit period and retailer’s promotional effort with sales learning curve. We determine the retailer’s promotional effort for each item and the joint replenishment cycle in both decentralized and centralized decision models. We show that the profits for both parties increase under the centralized decision model when the credit period is kept within an appropriate range. The impacts of credit period and sales learning curve on the behavior of the channel are also discussed. We conclude with computation analyses that lead to a variety of management insights.
An Active Queue Management Algorithm for Reducing Packet Loss Rate
Authors: Abbasov Babek , Korukoğlu Serdar
Published: June 2016

Among various active queue management schemes (AQM), random early detection (RED) is probably the most extensively studied. Unlike the existing RED enhancement schemes, we use hazard rate estimated packet dropping function in RED. We call this new scheme HERED. The underlying idea is that, with the proposed packet dropping function, packet dropping becomes gentler than RED at light traffic load but more aggressive at heavy load. Simulations demonstrate that HERED achieves a higher and more stable throughput and performs better than current active queue management algorithms due to the lowest packet drops.