bluuebunny/crossref_metadata_2025 huggingface dataset:
A arquitetura nunca mais será a mesma. considerações sobre género e espaço(s)
Authors: Antunes Lia Pereira Saraiva Gil
Published: October 2017

A arquitetura tem apoiado o seu reconhecimento na vida dos “grandes mestres”, como “faróis históricos” capazes de legitimar a quase totalidade de um discurso disciplinar – têm-se investigado quais as consequências desta visão unilateral da história e quais as alternativas possíveis. Procura-se explorar as formas como as mulheres vivenciam e ocupam o espaço, enquanto utilizadoras, e expor a proble­mática da construção da cidade e da arquitetura como uma prática maioritariamente masculina. Pensa-se também uma tentativa de reformulação da arquitetura, enquanto instituição, e da sua história, que visa incluir as perspetivas das arquitetas e desvendar o mainstream da disciplina.
Mulheres Invisíveis. Princípios para uma reconstrução do discurso em Arquitetura
Authors: Monteiro Paula
Published: October 2017

O discurso arquitetônico sempre promoveu a figura masculina enquanto ator principal. Em Portugal realidade arrastou-se até meados do século XX, momento em que se diplomam as primeiras arquitetas. Ainda que as circunstâncias comecem a transformar-se, tornando-se a arquitetura uma profissão que caminha para a paridade de géneros, os percursos destas arquitetas pioneiras, que quebraram preconceitos, continuam afastados do protagonismo autoral. As implicações desta lacuna no conhecimento da disciplina e da profissão torna-se evidente quando, atendendo às novas preocupações da disciplina, a revisão da história e dos seus protagonistas se torna cada vez mais pertinente, com potencialidades reveladoras de um novo modo de olhar para a profissão, de uma nova realidade.
Localizando performances: territorialidade e os estudos antropológicos de gênero e sexualidade
Authors: Silva Marcos Aurélio da
Published: October 2017

O artigo apresenta algumas possibilidades que conceitos e metáforas espaciais oferecem para as ciências humanas e sociais, nos estudos de gênero e sexualidade, passando por questões como identidade e imagem no contemporâneo. Partindo do feminismo pós-colonial e de dois campos etnográficos distintos, como um carnaval gay e um festival de cinema da diversidade sexual, o autor se utiliza do conceito de territorialidade como uma alternativa a enfoques que correm o risco de gerar certos essencialismos em temas como identidade ou cultura, uma preocupação em voga na antropologia contemporânea.
Price discovery and Volatility.A Theoretical Approach
Authors: Kambeu Edson , Mpofu Olipha , Muchochoma Drayton
Published: October 2017

In this paper we analyse and show how price discovery process influence the volatility of stocks. Using a theoretical approach, our initial analysis revealed that stocks experience ‘normal’ volatility as the price move from one equilibrium price to another as part of the price discovery process. Our further analysis revealed that, due to the inefficiency of financial markets, stocks also experience transitionary volatility which occurs when the price transition from one equilibrium price to another. The implication of these analytical findings means that the price discovery volatility effects can only be reduced by improving the efficiency of financial markets. Thus, we recommended that the financial microstructure be designed in a manner that promotes the efficiency of financial markets.      
Makro İhtiyati Para Politikası Araçları ve Türkiye Uygulaması Üzerine Genel Bir Bakış
Authors: Eroğlu Nadir , Kara Funda
Published: October 2017

Bu çalışmanın amacı, Türkiye Cumhuriyet Merkez Bankası’nın (TCMB) 2008 Küresel Ekonomik Kriz sonrası makro ihtiyati para politikası uygulamalarını incelemek ve etkilerini değerlendirmektir.Küresel krize karşı 2010 yılından itibaren TCMB’nin eski politika çerçevesinde kullanılan politika faizinin yanı sıra makro ihtiyati politikalar çerçevesinde uyguladığı başlıca para politikası araçları; zorunlu karşılıklar, faiz koridoru, likidite yönetimi ve rezerv opsiyon mekanizması gibi araçlardan oluşmaktadır.

Çok sayıda politika aracının varlığının yarattığı karmaşıklığın yanı sıra, bu araçların etkinliğine ilişkin ampirik sonuçların kısıtlı olması, uygulama geçmişinin kısa süreli olması ve politik müdahaleler doğru bir değerlendirmeyi güçleştirmektedir.
The Use of Social Media in SMEs
Authors: Kalkan Adnan , Cetinkaya Bozkurt Ozlem
Published: October 2017

In today’s business world, social media tools (i.e. facebook, twitter, Linkedin, etc.) begin to play an important role in reaching and communicating with customers for businesses. However, the importance of using social media can’t be still understood by SMEs so far.  Businesses use different social media tools in various purposes in their life. In this research we aim to investigate the ideas of SMEs about social media and their aims of using social media tools. Data were collected from SMEs operating in Burdur by simple random sampling. The data obtained from the 84 questionnaires was entered to computer and statistical analysis was carried out by using SPSS 20 statistical program. In this study, reliability analysis was used firstly. Then, some descriptive analyses were carried out about using social media for SMEs. Finally, a frequency table regarding the social media usage in SMEs was given. As a result, it was seen that 82.1% of SMEs participating in this study have a social network page. Secondly, SMEs are using facebook social media network mostly. In addition, SMEs have expressed that they attend all statements involved in the use of social media scale.
Development of Letshoot Applications as an Instructional Media of Computer Network Troubleshooting
Authors: Atista Fadila Aini , Hatta Puspanda , Wihidayat Endar S
Published: October 2017

Based on the observations made in Class XII TKJ SMK Negeri 1 Banyudono, it is known that the interest of students on computer network troubleshooting material is low because the learning materials are delivered through the presentation media in one direction from teacher to student. This makes students less understand the material presented by the teacher. Based on the background of the problem, we propose to build an android based learning media that can help students learn independently, this application is called Letshoot. Letshoot were made as an instructional media of computer network troubleshooting that can help students learn independently without being hindered by place, time and teacher attendance. This research aims to develop and measure the feasibility level of Letshoot application. This app will help student to learn computer network troubleshooting. Using Borg and Gall's research and development model with the application developed in five stages: (1) data collection, (2) planning, (3) develop the preliminary form of product, (4) preliminary field testing, and (5) main product revision. The result of feasibility test of Letshoot application measured by using Likertscale from expert media get percentage 90,64% which belongs in very feasible category, from expert material equal to 82% which belongs very feasible category and from user equal to 82,11% which belongs to very feasible category to be used as a medium of learning. On these results can be concluded that the Letshoot application very feasible to use as a learning media of computer network troubleshooting in vocational high school
Robust and SparseLP-Norm Support Vector Regression
Authors: Ye Ya-Fen , Ying Chao , Shao Yuan-Hai , Li Chun-Na , Chen Yu-Juan ,   Zhijiang College, Zhejiang University of Technology 182 Zhijiang Road, Hangzhou 310024, China,   Rainbow City Primary School 501 Weiye Road, Hangzhou 310013, China,   School of Data Sciences, Zhejiang University of Finance and Economics 18 Xueyuan Road, Hangzhou 310018, China
Published: October 2017

A robust and sparseLp-norm support vector regression (Lp-RSVR) is proposed in this paper. The implementation of feature selection in ourLp-RSVR not only preserves the performance of regression but also improves its robustness. The main characteristics ofLp-RSVR are as follows: (i) By using the absolute constraint,Lp-RSVR performs robustly against outliers. (ii)Lp-RSVR ensures that useful features are selected based on theoretical analysis. (iii) Based on the feature-selection results, nonlinearLp-RSVR can be used when data is structurally nonlinear. Experimental results demonstrate the superiorities of the proposedLp-RSVR in both feature selection and regression performance as well as its robustness.
Innovation Path of Manufacturing Enterprises and Strategies for Transformation and Upgrading in China
Authors: Gu Guangtong , Xu Bing ,   School of Economics and Management, Zhejiang A & F University Hangzhou, Zhejiang 311300, China,   Center for China Farmers’ Development of Zhejiang Lin’an, Hangzhou, Zhejiang 311300, China,   Research Institute of Quantitative Economics, Zhejiang Gongshang University Hangzhou, Zhejiang 310018, China
Published: October 2017

The economy is facing transformation and technological upgrading, which is particularly imperative to upgrading the real economy in China. It is well known that manufacturing is the core of the real economy. Therefore, insights into the innovation path of manufacturing enterprises are helpful in understanding problems that exist, and they suggest future strategies in manufacturing innovation. In this paper, based on historical data from 2000 to 2014, Bayesian methods and time-varying parameter dynamic regression models are used to identify the innovation path of manufacturing enterprises. This paper shows that the relevant research departments within firms need to improve the efficiency of research and development (R&D) institutions and mobilize the enthusiasm of full-time R&D personnel to provide a solid foundation for innovation, and transformation, and upgrading of the manufacturing industry. The paper also shows the need to improve the efficiency of R&D investment and new product R&D investments. In addition to independent R&D, manufacturing enterprises should also increase the adoption of foreign technology into their own manufacturing processes. Finally, some future strategies with regards to transformation and upgrading are discussed.
Document-Based Programming System for Seamless Linking of Satellite Onboard Software and Ground Operating System
Authors: Kimura Shinichi ,   Tokyo University of Science 2641 Yamasaki, Noda, Chiba 278-8510, Japan, Asakura Yuki , Doi Hiroaki , Nakamura Masahiro
Published: October 2017

In satellites, onboard software is required to perform complicated mission sequences and autonomous scheduling, conduct preliminary data processing, and manage various onboard devices. The dependability of onboard software strongly affects the reliability of a satellite itself. Therefore, the onboard software must be both complex and reliable to perform complicated small satellite missions. We propose an automatic software generator to meet these requirements. This generates onboard software and a database for the ground operating system using satellite development documents, such as command and telemetry definition documents and fault detection, isolation, and recovery (FDIR) definition documents. By using this software generator, the software development load can be reduced and human error can be avoided, even if the definitions are modified in an ad hoc manner during the development process. The generator additionally enables the easy accommodation of user preferences and software depth variation during a mission.
Supporting Reaching Movements of Robotic Hands Subject to Communication Delay by Displaying End Effector Position Using Three Orthogonal Rays
Authors: Chinen Akihito ,   University of Tsukuba 1-1-1 Tennodai, Tsukuba 305-8573, Japan, Hoshino Kiyoshi
Published: October 2017

In this paper, we propose an operation support system, which shows the spatial relation between a robotic hand and an object, to overcome reduced usability due to communication delay. A communication delay of four seconds occurs during remote operation between the earth and the moon. Previous studies have used a method that feeds back the predicted position of a robotic hand after the communication delay occurs. However, this does not allow an accurate reaching motion necessary for grasping. Therefore, we try to show the spatial relation between a robotic hand and an object using three orthogonal rays, where each is annotated with 1 cm increments. Based on the results of our experiments, the grasping success rate of the proposed method increases by three times. As a result, the proposed method is effective in making accurate reaching motions for grasping in the visual-servoing remote control between the earth and the moon.
Percussive Rock Surface Remover Driven by Solenoid with Planer Motion for Lunar Exploration
Authors: Furutani Katsushi ,   Toyota Technological Institute 12-1 Hisakata 2-chome, Tempaku-ku, Nagoya 468-8511, Japan, Kamiishi Hisashi
Published: October 2017

This paper deals with a percussive rock surface crusher driven with a solenoid to smoothen the sample surface by a 2-axis planar motion. The weathered rock surface should be removed and smoothened before analyzing its structure and composition precisely. The solenoid, which generates a large vibration amplitude and a large impulsive force, was used to vibrate a tool bit with engineered 1-mm pyramids made of tungsten carbide. The tool bit was fixed parallel to the feed direction or with a skew. A rock sample was moved by a stage with movable ranges for the machining of 10 mm and 20 mm in the x- and y-directions, respectively. The sample paths were randomly generated in 1 or 2 directions. In the comparisons of the surface roughness, the 2-axis motion and tool skew not only allowed isotropic and small roughness but also the removal of more amount due to the removed debris. The roughness reached several tens of micrometers without a certain special frequency component. This level allows for component analysis by X-ray fluorescence or laser-induced breakdown spectrometer.
Quantification of Wellbore-Collision Probability by Novel Analytic Methods
Authors: Bang J..
Published: October 2017

Unintentional collision between two wellbores may have serious economic and health, safety, and environmental consequences. It is therefore important to evaluate the probability of such an event in the well-planning phase and at critical stages during the drilling phase.

A commonly used approach is to analyze the collision probability between two points, one in each wellbore, which are determined from geometric criteria only. This procedure may ignore point pairs with higher collision probabilities, and thereby lead to overoptimistic conclusions. Typically, the results from such methods will be accurate only for simple wellbore geometries, such as straight sections, and for position uncertainties that are highly symmetrical with respect to the wellbores. More advanced methods that overcome such limitations are impractical for general application because of high conceptual or computational complexity.

This paper proposes novel analytic methods that may potentially overcome these problems. Formulae are derived for two important situations: the direct-hit (DH) and the unintentional-crossing (UC) scenarios. In both cases, the spatial region of interest is divided into carefully designed segments, such that the collision probability can be accurately evaluated for each segment. The total collision probability is then found by summing the results over all segments. The main advantage of this approach is that it gives accurate results for arbitrary well geometries and uncertainty-ellipsoid orientations.

The algorithms can easily be integrated in existing software for wellbore-anticollision analysis. The paper shows examples of results that are all in good agreement with control calculations. Compared with existing methods, the proposed methods are therefore believed to represent an improvement to quantitative collision-probability analysis for both the wellbore-planning and the drilling phases.
Documenting Changes in USGA Specification Rootzone Properties in Ultradwarf Bermudagrass Greens
Authors: Fidanza M. A. , Snyder G. H. , Cisar J. L.
Published: October 2017

The United States Golf Association (USGA) Green Section has specifications for putting green construction to provide uniform playability and performance throughout the golfing season. However, it is recognized that chemical and physical rootzone properties of these greens change over time. To monitor and characterize these changes, thatch, organic matter (OM) accumulation, and saturated hydraulic conductivity (Ksat) of two ultradwarf bermudagrass [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt Davy] greens on four southern Florida golf courses (i.e., eight greens total) were measured over an 8‐yr period from 2006 through 2013. Over time, thatch thickness stabilized at 2.5 cm or less, whereas the OM stained layer increased in thickness to nearly 10 cm. The OM content fluctuated during the year in response to summer cultivation programs (i.e., verticutting and hollow‐core aerification), but OM content was typically greater in spring than in fall. The Ksat was typically lower in spring and higher in fall, which could be attributed to summer cultivation practices and OM content. Golf course superintendents who routinely monitor thatch, OM, and Ksat on their ultradrawf bermudagrass USGA‐specification sand‐based greens can potentially use that information to illustrate to their stakeholders why summer cultivations are necessary, and what has been achieved from a summer cultivation program.
Competitiveness of Three Warm‐Season Turfgrasses during Spring Transition of Overseeded Turfs
Authors: Fontanier Charles , Steinke Kurt
Published: October 2017

Prior research on the topic of southern winter overseeding systems has been limited to the testing of management practices, seeding rates, and cool‐season grass genotypes. A desirable spring transition may also be dependent on warm‐season turfgrass species. A field study was conducted in College Station, TX, on overseeded (Lolium perenne L.) and nonoverseeded zoysiagrass (Zoysia spp. Willd. ‘Cavalier’), seashore paspalum (Paspalum vaginatum Swarz. ‘Sea Isle 1’), and hybrid bermudagrass [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt‐Davy ‘Tifway’] fairway turfs. The objectives of the experiment were to measure eight canopy attributes of the warm‐season species and to relate differences to competitiveness during the spring transition. Samples of canopies were collected in May, July, and September from each warm‐season turfgrass. Leaf area, leaf and shoot weight, and leaf and shoot counts were measured and used to calculate common plant canopy metrics such as leaf area index, leaf area ratio, specific leaf area, and leaf weight ratio. Grasses capable of extending vertical stems as an overtopping mechanism, as conveyed by lower leaf weight ratios, appear more competitive for light in a spring overseeded turf (e.g., hybrid bermudagrass) than grasses that invest significant resources towards leaf production (e.g., zoysiagrass). High shoot plasticity (change in canopy traits due to overseeding treatment) and efficient leaf area production (i.e., high specific leaf area) of seashore paspalum also contributed a competitive advantage during the spring transition period. This research demonstrates that canopy morphology can be a contributing factor to competitiveness of warm‐season turfgrasses in an overseeded turfgrass system.
Influence of Nitrogen, Plant Growth Regulators, and Iron Sulfate on Annual Bluegrass Populations on a Golf Green
Authors: Han Kyung M. , Kaminski John E. , Lulis Timothy T.
Published: October 2017

Annual bluegrass (ABG, Poa annua L.) is often considered a weed on golf greens. Although numerous sustainable and low‐input management practices have gained popularity, no research‐based information is available on their ability to reduce ABG while promoting more desirable species, such as creeping bentgrass (CBG, Agrostis stolonifera L.). The objective of this 2‐yr field study was to elucidate the interaction of nitrogen (N) rates, plant growth regulators (PGRs), and iron sulfate (Fe) rates as they relate to reducing ABG populations in a golf green. Turf consisted of a mature stand of ‘L‐93’ CBG (∼75%) and ABG (∼25%). Factors included N from ammonium sulfate (21 N‐0 P‐0 K) (24 or 108–147 kg N ha−1 yr−1),the PGRs trinexapac‐ethyl (TE, 0.043 kg a.i. ha−1 application−1) and flurprimidol (FL, 0.28 kg a.i. ha−1 application−1), and Fe from iron sulfate (0, 12, or 49 kg Fe ha−1 application−1). Treatments were initiated in May and applied approximately every 3 wk in 2010 and 2011. Plots receiving 24 kg N ha−1 yr−1 received only four applications during the season. The effect of N and PGR was greatest on ABG populations. Few differences in ABG populations existed among plots treated with TE or no PGR. Turf within plots treated with FL had a seasonal average of 4 and 14% ABG in 2010 and 2011, respectively. Plots treated with 24 kg N ha−1 yr−1 generally had lower ABG populations. In 2011, ABG populations were negatively correlated with Fe rate in turf receiving 24 kg N ha−1 yr−1, but not in plots treated with 147 kg N ha−1 yr−1. Flurprimidol had the greatest effect on ABG populations in the N × PGR × Fe programs. Few differences in soil pH or organic matter levels, mostly agronomically insignificant, were observed among treatments. While ABG populations varied among select treatment combinations, the long‐term impact on species composition and overall turfgrass quality remains unknown.
Drought Response of Fine Fescue Mixtures Maintained as a Golf Course Fairway
Authors: Reiter Maggie , Friell Josh , Horgan Brian , Soldat Douglas , Watkins Eric
Published: October 2017

Fine fescues (Festucaspp.) may provide acceptable turf quality and playability on golf course fairways with lower irrigation inputs. Information on fine fescue fairways is limited and these species are not widely used as fairway turfgrass in the United States. The objective of this project was to evaluate the green cover of fine fescue species as fairway turfgrass under an acute drought and access their ability to recover. Twenty‐five mixtures were developed with a simplex‐centroid design using ‘Treazure II’ Chewings fescue [Festuca rubrassp.commutata(Thuill.) Nyman], ‘Beacon’ hard fescue [Festuca trachyphylla(Hack.) Krajina], ‘Navigator II’ strong creeping red fescue (Festuca rubrassp.rubraGaudin), ‘Shoreline’ slender creeping red fescue [Festuca rubrassp.litoralis(G.F.W. Meyer) Auquier], and ‘Quatro’ sheep fescue (Festuca ovinaL.). Experiments were seeded in fall 2014 at both St. Paul, MN, and Madison, WI. After 10 mo of establishment, rainout shelters were used to employ a 60‐d drought on each trial during summer 2015. Plots were not trafficked. Data collected included percentage green cover as determined by digital image analysis. Analysis of variance indicated significant differences in mixture treatments, but means separation with Fisher's protected LSD showed that many monocultures performed generally similar to seed mixtures. A marginal effects summary revealed no differences among individual species, with one exception. Sheep fescue and slender creeping red fescue, when in the same mixture, had a negative interaction effect for recovery after drought. This interaction was significantly lower than the all five species coefficients included in the model, based on a 90% confidence interval. Overall, this study found that fine fescues are able to survive a 60‐d drought period under North Central US summer conditions.
Impact of Nitrogen Source and a pH Buffer on the in vitro Growth and Morphology of Rhizoctonia solani AG 2‐2 LP
Authors: Koehler J. F. , Miller G. L.
Published: October 2017

Large patch (LP) disease of zoysiagrass (Zoysia japonica Steud.) caused by the fungal pathogen Rhizoctonia solani AG 2‐2 LP is an important disease in the United States transition zone that limits the utility and aesthetics of lawns and golf fairways. A preliminary study has shown that R. solani grown on ammonium‐based media remained white, while isolates grown on nitrate‐based media and potato dextrose agar (PDA) were melanized and brown. This study aimed to evaluate the effects of nitrogen source and a pH buffer on the radial growth and morphology of R. solani AG 2‐2 LP. Forty isolates were initially grown on antibiotic amended PDA and transferred to water agar. Mycelial plugs from water agar were transferred to basal media amended with ammonium sulfate (AMS), calcium nitrate, or urea at concentrations of 0, 50, 100, 200, 400, and 800 µg mL−1. A second set of each concentration was also amended with fumaric acid (FA) pH buffer. All media was brought to pH of 7.0 prior to autoclaving. Radial growth was recorded after 4 d. Isolates grown on calcium nitrate had the greatest radial growth, isolates grown on AMS were intermediate, and urea‐grown isolates had the least radial growth (P < 0.0001). Radial R. solani colony growth increased with increasing calcium nitrate concentration, but growth decreased with increasing AMS and urea concentrations. Fumaric acid increased radial growth on all N‐sources. All isolates melanized on media amended with calcium nitrate and urea. Isolates grown on 200 µg mL−1 AMS melanized with FA, but remained white without FA. If melanin plays a role in pathogen infection and pathogen survival, a fertility program involving AMS may be useful in an integrated strategy to suppress large patch.
Relationship of Macronutrients and Nonstructural Carbohydrate Concentration in Clippings of Creeping Bentgrass Putting Greens in Japan
Authors: Cho Tetsu , Kudo Makoto , Kimura Shoichi
Published: October 2017

Creeping bentgrass (Agrostis stolonifera L.) is the predominant cool‐season turfgrass of putting greens in Japan. Most areas of Japan are in the transition zone, and its hot and humid summer translates to many turf management challenges. Nonstructural carbohydrates are used by plants to sustain growth during periods of stress when photosynthesis is compromised and have been widely used as a physiological measure of stress tolerance. In our previous study, we demonstrated that the fructan concentration of leaf clippings can be used as an index for total nonstructural carbohydrates in creeping bentgrass. In this study, we examined the relationships between fructan concentration and macronutrient (N, P, or K) concentration in clippings from creeping bentgrass putting greens across >200 golf courses in Japan over an 8‐yr period. The leaf fructan concentration tended to be high in December to February and low in August to September, before some increase in October. The leaf N concentration was less affected by season than fructan concentration, with a small increase seen from June to October and a small decrease in December. The leaf P concentration tended to be high in July and August and low in January and February. The leaf K concentration showed smaller seasonal change. The leaf N concentration was negatively correlated with fructan concentration in each month. The relationship between P and fructan concentration varied with season. The relationship between K and fructan was similar to that of P and fructan, but the correlation was much weaker.
Effects of Seasonal Fertilizer Distribution on the Competition from Annual Bluegrass on Red Fescue Putting Greens
Authors: Chen Yajun , Kvalbein Agnar , Pettersen Trond , Aamlid Trygve S.
Published: October 2017

Invasion of annual bluegrass (Poa annua L.) is a major concern on red fescue (Festuca rubra L.) putting greens. Our objective was to determine the effect of three seasonal fertilizer distribution treatments on red fescue turf quality and annual bluegrass encroachment. The experiment was conducted over 2 yr on a USGA‐specified putting green at NIBIO Turfgrass Research Center Landvik, Norway (58° N). A complete liquid fertilizer was applied weekly for an annual nitrogen input of 11 g m−2 in all treatments. In the FLAT rate treatment, the weekly fertilizer rate was 0.45 g N m−2 wk−1 from 5 May to 28 September. The FALL+ treatment received 0.68 g N m−2 wk−1 from 11 August to 28 September and 0.23 g N m−2 wk−1 from 5 May to 21 June, whereas the SPRING+ treatment was the opposite. The SPRING+ fertilization resulted in significantly better turf quality and significantly less annual bluegrass than the two other treatments in the second year of the study. The FALL+ fertilization gave higher quality ratings in the fall and early spring, but this effect came at the expense of more annual bluegrass. In conclusion, we recommend a fertilizer regime with the highest input from early May until midsummer to produce red fescue putting greens with the highest possible turfgrass quality and minimal encroachment by annual bluegrass.
Rainfall versus Irrigation Influences Penetration Resistance and Surface Hardness on a Recreational Sports Field
Authors: Straw Chase M. , Bowling William J. , Henry Gerald M.
Published: October 2017

Penetration resistance and surface hardness were evaluated on the basis of volumetric water content (VWC) resulting from either rainfall or irrigation on a recreational sports field. The magnitude of VWC, penetration resistance, and surface hardness changed substantially at each sampling date. Spatial variability of VWC and penetration resistance appeared to be most affected between periods of rainfall versus irrigation. Spatial variability of surface hardness was not influenced substantially by soil moisture condition, but rather the combined effect of penetration resistance and turfgrass cover on each sampling date. Baseline testing is recommended for native soil fields after rainfall and irrigation to determine whether a field meets predetermined performance standards. Subsequent sampling should be conducted under similar soil moisture conditions to compare back to baseline data. Spatial maps of VWC collected after a rainfall event may provide insight into the infiltration and drainage capabilities of a sports field, whereas data collected after irrigation are likely best for assessing malfunctioning irrigation heads. Spatial maps of surface hardness may be useful for the delineation of site‐specific cultivation zones, since the spatial distribution of surface hardness was not influenced by soil moisture.
Evaluation and Breeding of Zoysiagrass Using Japan's Natural Genetic Resources
Authors: Ebina Masumi , Kobayashi Makoto , Tonogi Hideaki , Tsuruta Shin‐ichi , Akamine Hikaru , Kasuga Shigemitsu
Published: October 2017

In the early 1990s, breeding of zoysiagrass (Zoysia spp.) began with the collection and evaluation of >1200 accessions from 100 natural Zoysia grasslands and habitats in Japan. Through this program, the accessions ‘Asagake’ and ‘Asamoe’, with superior agronomic traits and turf quality, were released. Using trait scores of 12 breeders’ lines, we preliminarily analyzed their broad‐sense heritability (H2) to collect basic breeding information. This analysis revealed high H2 in spike length (96.3%) and spike color (98.6%), but low H2 in stolon density (30.1%). The analysis revealed lower H2 of physiological traits, especially of plant vigor after winter (44.7%). These results indicate that breeding for morphological traits could be easier than breeding for physiological traits, especially winter hardiness.
ANFIS modeling and sensitivity analysis for estimating solar still productivity using measured operational and meteorological parameters
Authors: Mashaly Ahmed F. , Alazba A. A.
Published: October 2017

This study investigates a potential application of the adaptive neuro-fuzzy inference system (ANFIS) as a relatively new approach for predicting solar still productivity (SSP). Five variables, relative humidity (RH), solar radiation (SR), feed flow rate (MF), and total dissolved solids of feed (TDSF) and brine (TDSB), were used as input parameters. The data were collected from an experimental solar still system used to desalinate seawater in an arid climate. The data were distributed randomly into training, testing, and validation datasets. A hybrid learning algorithm and eight different membership functions were applied to generate the ANFIS models. Several statistical criteria were used to assess the model performances. The ANFIS model with a generalized bell membership function provided the best prediction accuracy compared with models with other membership functions. The coefficient of correlation values for this model were 0.999, 0.959, and 0.832 for training, testing, and validation datasets, respectively. Sensitivity analysis (SA) was used to show the effectiveness of the considered input parameters for predicting SSP. The SA results indicated that SSP is the most influential parameter on SSP. Generally, the findings indicate the robustness of the ANFIS approach for estimating SSP.
Сверхминиатюрные излучатели на основе одиночной (111) In(Ga)As квантовой точки и гибридного микрорезонатора
Authors: Деребезов И.А. , Гайслер В.А. , Гайслер А.В. , Дмитриев Д.В. , Торопов А.И. , Fischbach S. , Schlehahn A. , Kaganskiy A. , Heindel T. , Bounouar S. , Rodt S. , Reitzenstein S.
Published: October 2017

Представлены результаты численного моделирования и исследования гибридного микрорезонатора на основе полупроводникового брэгговского отражателя и селективно позиционированной над одиночной (111) In(Ga)As-квантовой точкой микролинзы. Излучатели на основе гибридного микрорезонатора демонстрируют эффективную накачку одиночной квантовой точки и высокую эффективность вывода излучения. Дизайн микрорезонатора может быть использован для реализации излучателей фотонных пар, запутанных по поляризации, на основе одиночных полупроводниковых квантовых точек. DOI: 10.21883/FTP.2017.11.45089.03
Термоэлектрические эффекты в наноразмерных слоях силицида марганца
Authors: Ерофеева И.В. , Дорохин М.В. , Лесников В.П. , Кузнецов Ю.М. , Здоровейщев А.В. , Питиримова Е.А.
Published: October 2017

Экспериментально получены значения величин термоэдс, слоевого сопротивления и коэффициента теплопроводности наноразмерного слоя MnxSi1-x и сверхрешетки MnxSi1-x/Si на кремнии в зависимости от температуры в диапазоне T=300-600 K. Обсуждается роль наноразмерной пленки и подложки в формировании термоэлектрического эффекта. Оценена величина термоэлектрической добротности одиночного слоя силицида марганца, сверхрешетки и системы слой/подложка. Наибольшее значение добротности ZT=0.59±0.06 получено для Mn0.2Si0.8 при T=600 K. DOI: 10.21883/FTP.2017.11.45090.04
Транспорт горячих носителей заряда в Si, GaAs, InGaAs и GaN субмикронных полупроводниковых структурах с нанометровыми кластерами радиационных дефектов
Authors: Забавичев И.Ю. , Оболенская Е.С. , Потехин А.А. , Пузанов А.С. , Оболенский С.В. , Козлов В.А.
Published: October 2017

Проведен расчет распределений радиусов и расстояний между ядрами субкластеров радиационных дефектов в Si, GaAs и GaN. Обсуждаются особенности транспорта горячих носителей заряда в облученных нейтронами материалах. Впервые рассчитан всплеск скорости электронов в Si, GaAs, InGaAs и GaN до и после радиационного воздействия и проведено сравнение силы проявления указанного эффекта в различных полупроводниковых материалах. DOI: 10.21883/FTP.2017.11.45096.10
Низкотемпературное осаждение пленок SiN-=SUB=-x-=/SUB=- в индуктивно-связанной плазме SiH-=SUB=-4-=/SUB=-/Ar + N-=SUB=-2-=/SUB=- в условиях сильного разбавления силана аргоном
Authors: Охапкин А.И. , Королёв C.А. , Юнин П.А. , Дроздов М.Н. , Краев С.А. , Хрыкин О.И. , Шашкин В.И.
Published: October 2017

Получены пленки SiNx на кремнии в индуктивно-связанной плазме SiH4/Ar + N2 в условиях сильного разбавления силана аргоном. Изучены зависимости скорости осаждения и свойств нитрида кремния от газового состава плазмы, давления, мощности емкостного и индуктивного разрядов. В ряде случаев характер найденных зависимостей отличается от литературных данных, известных для неразбавленных реагентов. Установлено, что наименьшее содержание примесей в пленках и их наилучшие свойства реализуются при соотношении азота и силана, близком к 1.4. Возрастание мощности емкостного разряда способствует получению более гладких образцов за счет полирующего действия ионов аргона. DOI: 10.21883/FTP.2017.11.45099.13
Усиление терагерцового излучения в плазмонной n-i-p-i-структуре на основе графена с инжекцией носителей заряда
Authors: Полищук О.В. , Фатеев Д.В. , Попов В.В.
Published: October 2017

Теоретически исследован спектр поглощения/усиления терагерцового излучения в неоднородном графене (n-i-p-i-структура) с периодической двойной металлической решеткой. Показано, что усиление терагерцового излучения на частоте плазмонного резонанса резко возрастает, когда потери за счет электронного рассеяния и потери на излучение уравновешиваются плазмонным усилением (связанным со стимулированной излучательной межзонной рекомбинацией электронно-дырочных пар в инвертированной области графена). DOI: 10.21883/FTP.2017.11.45102.16
Особенности выращивания лазерных структур InGaAs/ GaAs/AlGaAs методом МОС-гидридной эпитаксии на подложках Ge/Si
Authors: Байдусь Н.В. , Алешкин В.Я. , Дубинов А.А. , Кудрявцев К.Е. , Некоркин С.М. , Новиков А.В. , Павлов Д.А. , Рыков А.В. , Сушков А.А. , Шалеев М.В. , Юнин П.А. , Юрасов Д.В. , Яблонский А.Н. , Красильник З.Ф.
Published: October 2017

Исследован рост лазерных структур InGaAs/GaAs/AlAs методом МОС-гидридной эпитаксии при низком давлении на подложках Si(001) с эпитаксиальным метаморфным буферным слоем Ge разной толщины. Представлены результаты влияния на кристаллическое и оптическое качество формируемых AIIIBV структур температуры роста и встраивания на границе с Ge/Si(001) подложкой дополнительных слоев AlAs. Продемонстрировано, что встраивание AlAs/GaAs/AlAs решетки на начальных этапах роста AIIIBV гетероструктур на Ge буферных слоях, выращенных на неотклоненных Si(001) подложках, позволяет значительно снизить плотность прорастающих дефектов и, как следствие, формировать эффективно излучающие лазерные структуры. Показана возможность выращивания на Si(001) подложках напряженных квантовых ям InGaAs, демонстрирующих стимулированное излучение в области длин волн больше 1100 нм. DOI: 10.21883/FTP.2017.11.45115.32
Влияние релаксации кубита на транспортные свойства микроволновых фотонов
Authors: Султанов А.Н. , Гринберг Я.С.
Published: October 2017

В работе с помощью метода неэрмитового гамильтониана исследовано прохождение одиночного фотона в одномерном волноводе, взаимодействующем с резонатором, содержащим произвольное число фотонов, и двухуровневый искусственный атом, с учетом релаксации последнего. Получены аналитические выражения для транспортных коэффициентов, в явном виде учитывающие параметр релаксации кубита. Форма коэффициента прохождения (отражения), когда в резонаторе находится более одного фотона, качественно отличается от однофотонного резонатора, и содержит в себе проявление эффекта фотонной блокады. Bремя жизни кубита зависит от числа фотонов в резонаторе. Работа выполнена при финансовой поддержке Российского научного фонда (грант N 16-19-10069.) DOI: 10.21883/FTT.2017.11.45041.08k
Влияние межузельного кулоновского взаимодействия на киральную сверхпроводимость при наличии неколлинеарного спинового упорядочения
Authors: Вальков В.В. , Злотников А.О.
Published: October 2017

Исследовано влияние межузельного кулоновского взаимодействия в планарной системе с треугольной решеткой на структуру кирального параметра порядка Delta( p) в фазе сосуществования сверхпроводимости и неколлинеарного 120o магнитного упорядочения. Установлено, что кулоновские корреляции в отмеченной фазе инициируют состояние, в котором квазиимпульсная зависимость Delta( p) представима в виде суперпозиции киральных инвариантов, соответствующих dx2-y2+idxy- и px+ipy-типам симметрии. Показано, что включение кулоновского взаимодействия смещает положение нодальных точек Delta( p), изменяя тем самым условия реализации квантового топологического перехода.03k Работа выполнена при поддержке фонда РФФИ, правительства Красноярского края и Краевого фонда науки (проекты N 16-02-00073-а, 16-42-243057-р-мол-а) и Комплексной программы СО РАН II.2П (проект 0358-2015-002). А.О. Злотников благодарит за поддержку в рамках стипендии президента РФ СП-1370.2015.5. DOI: 10.21883/FTT.2017.11.45044.03k
Фазовые переходы в гибридных SFS-структурах с тонкими сверхпроводящими слоями
Authors: Самохвалов А.В.
Published: October 2017

На основе линеаризованных уравнений Узаделя выполнены расчеты критической тем пературы Tc фазового перехода в сверхпроводящее состояние гибридной структуры сверх проводник/ферромагнетик/сверхпроводник (SFS) c эффектом близости. Показано, что эффект близости между S и F металлами и обменное взаимодействие могут индуцировать неоднородное сверхпроводящее состояние с продольной слоям модуляцией сверхпроводящего параметра порядка Delta propto exp(ipz), которое характеризуется отличным от нуля значением волнового числа p, описывающего неустойчивость Ларкина-Овчинникова-Фульде-Феррелла. Изучено влияние этой неустойчивости на переходы между 0- и pi-состояниями SFS-структуры. Показано, что 0-pi переход сопровождается немонотонной зависимостью как критической температуры Tc, так и эффективной глубины проникновения магнитного поля Lambda в гибридную структуру от характерного размера ферромагнитной области. Работа выполнялась при финансовой поддержке гранта РНФ N 151210020. DOI: 10.21883/FTT.2017.11.45048.07k
Модифицирование свойств ферромагнитных слоев на основе соединений A-=SUP=-3-=/SUP=-B-=SUP=-5-=/SUP=- импульсным лазерным отжигом
Authors: Вихрова О.В. , Данилов Ю.А. , Звонков Б.Н. , Здоровейщев А.В. , Кудрин А.В. , Лесников В.П. , Нежданов А.В. , Павлов С.А. , Парафин А.Е. , Пашенькин И.Ю. , Планкина С.М.
Published: October 2017

С целью повышения концентрации электрически-активного Mn в слоях полупроводников A3B5 : Mn выполнены эксперименты по лазерному отжигу. Использован эксимерный лазер LPX-200 на KrF с длиной волны 248 nm и длительностью импульса ~30 ns. Экспериментально показано, что при энергии импульса эксимерного лазера >230 mJ/cm2 концентрация дырок в слоях GaAs : Mn увеличивается до 3·1020 cm-3. Отрицательное магнетосопротивление и аномальный эффект Холла с петлей гистерезиса для отожженных образцов GaAs : Mn сохраняются вплоть до 80-100 K. Аналогичные изменения в результате лазерного отжига наблюдаются и для слоев InAs : Mn. Работа выполнена в рамках реализации государственного задания (проект N 8.1751.2017/ПЧ) Минобрнауки России и Программы фундаментальных исследований ОФН РАН II.4 Спиновые явления в твердотельных наноструктурах и спинтроника" (тема 31). DOI: 10.21883/FTT.2017.11.45049.12k
Локализованные моды спин-волнового резонанса ферромагнитных микрополосок в поле магнитного зонда
Authors: Горев Р.В. , Миронов В.Л.
Published: October 2017

Приводятся результаты микромагнитного моделирования вынужденных колебаний намагниченности планарных микрополосок из NiFe с анизотропией легкая плоскость и из Co/Pt с перпендикулярной анизотропией типа легкая ось в поле магнитного сферического зонда. Показано, что под воздействием поля зонда в полосках NiFe реализуется связанное состояние "еж"-"антивихрь", обусловленное латеральными компонентами поля зонда, а в слое Co/Pt реализуется скирмионное состояние намагниченности. Эти эффекты приводят к искажению пространственных распределений колебаний намагниченности микрополосок и к появлению дополнительных резонансов в спектрах колебаний, связанных с модами, локализованными в поле зонда. Работа выполнена при поддержке Российского научного фонда (проект N 16-12-10254). DOI: 10.21883/FTT.2017.11.45053.10k
Определение сверхвысокочастотной магнитной проницаемости альсифера из измеренной проницаемости композитных материалов
Authors: Старостенко С.Н. , Розанов К.Н. , Ширяев А.О. , Лагарьков А.Н. , Шалыгин А.Н.
Published: October 2017

По частотным зависимостям диэлектрической и магнитной проницаемостей композитных материалов, состоящих из порошка альсифера (сплава AlFeSi) и парафиновой матрицы, восстановлена магнитная проницаемость сплава. Измерения проницаемостей проведены в коаксиальной линии в диапазоне частот 0.05-20 GHz. Рассмотрено влияние на СВЧ магнитные свойства композитов концентрации, формы и размера частиц порошка. Получено хорошее согласие результатов измерений с формулой Максвелла-Гарнетта, обобщенной с учетом формы частиц, порога протекания и скин-эффекта. Найденные при этом размеры частиц согласуются с данными электронной микроскопии и гранулометрии. И частота, и добротность линии ферромагнитного резонанса для пластинчатых частиц оказываются выше, чем для сферических. Показано, что порошки альсифера являются перспективным наполнителем для радиопоглотителей. Исследование выполнено при финансовой поддержке Российского научного фонда (проект N 16-19-10490). DOI: 10.21883/FTT.2017.11.45058.20k
Исследование структуры электронных состояний соединений FeGa-=SUB=-3-=/SUB=- и RuGa-=SUB=-3-=/SUB=- методом оптической спектроскопии
Authors: Князев Ю.В. , Кузьмин Ю.И.
Published: October 2017

Проведены исследования оптических свойств интерметаллических соединений FeGa3 и RuGa3 в интервале длин волн 0.22-14 mum. Спектры межзонного поглощения света интерпретируются на основе сравнительного анализа рассчитанных и экспериментальных дисперсионных зависимостей оптической проводимости. Экспериментальные данные подтверждают существование в плотностях состояний данных материалов энергетических щелей на уровне Ферми шириной ~0.6 eV, что ранее предсказывалось в зонных расчетах. Работа выполнена в рамках государственного задания ФАНО России (тема "Электрон", N 01201463326) при частичной поддержке РФФИ (проект N 17-52-45056). DOI: 10.21883/FTT.2017.11.45065.138
Ферроэлектрика неоднородно деформированных кристаллов редкоземельных гранатов, возбуждаемая при распространении упругих волн
Authors: Попов А.И. , Сабденов Ч.К. , Звездин К.А.
Published: October 2017

Проведен анализ влияния деформации на формирование электрических свойств редкоземельных соединений со структурой граната. Показано, что неоднородные деформации приводят к возникновению электрической поляризации у кристаллов гранатов. Эффект обусловлен наличием в структуре кубических кристаллов гранатов неэквивалентных низкосимметричных мест расположения редкоземельных ионов, симметрия окружения которых не содержит центра инверсии. Изучено поведение поляризации подсистемы редкоземельных ионов в кристаллах гранатов при распространении в них упругих волн. Работа поддержана грантом РФФИ N 16-29-14005. DOI: 10.21883/FTT.2017.11.45070.144
Влияние дислокаций на структурный параметр порядка в кристалле при упругой деформации кручения
Authors: Заворотнев Ю.Д. , Захаров А.Ю. , Метлов Л.С.
Published: October 2017

Изучено взаимодействие структурной подсистемы с дислокациями при наложении упругой деформации кручения. Рассмотрение проведено в рамках феноменологической теории Ландау при отказе от приближения постоянства модулей неприводимых векторов. Показано появление дополнительных пространственных амплитудных и частотных осцилляций, связанных с изменением модуля структурного параметра порядка и плотности дислокаций. А.Ю. Захаров признателен Министерству образования и науки РФ за финансовую поддержку в рамках госзадания (грант 3.3572.2017/ПЧ). DOI: 10.21883/FTT.2017.11.45073.121
Экспериментальное исследование распределений плотности тока технологического электронного пучка
Authors: Щербаков А.В. , Родякина Р.В. , Кожеченко А.С. , Гапонова Д.А. , Гончаров А.Л. , Драгунов В.К.
Published: October 2017

Предложена экспериментальная методика получения распределений плотности тока непрерывно действующих электронных пучков с энергией электронов 60 keV. Приведены результаты измерений для различных поперечных сечений пучка мощностью 2.1 kW с плотностью тока порядка 1·105 A/m2. DOI: 10.21883/PJTF.2017.21.45156.16916
Аморфизация льда при механических напряжениях
Authors: Бордонский Г.С. , Крылов С.Д.
Published: October 2017

Исследованы диэлектрические параметры свежеобразованного пресного льда в микроволновом диапазоне. Установлено, что такой лед содержит заметное количество аморфного льда. Его появление связывается с пластической деформацией при механических напряжениях. Представлена оценка изменения диэлектрической проницаемости, определяемой аморфным льдом, при состоянии медленного течения среды. DOI: 10.21883/PJTF.2017.21.45163.16938