Number Of Arrows Research Articles

A biomechanical approach to study lunge in fence athletes

Fencing requires neuromuscular coordination, strength, and power, and it has a high impact on the musculoskeletal system [1–5]. The lunge is the most important strike action. It is produced with explosive power and surprises the opponent to score points. The lunge starts from the armed arm, which must be moved as quickly as possible toward the opponent, combined with lower body movements to provide a boosting action [4]. The present study aims at assessing kinematics and electromyographic differences between tasks and categories. The participants were 28 male and female, élite and recreational fencers, practicing foil and épée. The age ranged from 8 to 35 years old. Anthropometric and biographical information were taken. Kinematics data were acquired using a wearable inertial system BTS G-SENSOR2, positioned on the L5 vertebra. Four wearable EMG probes BTS FREEEMG 1000 were used to detect EMG signal of Deltoideus Anterior (DLTA) and Rectus femoris (RF) both on the armed side; Erector Longissimus muscle (LONG) and Gastrocnemius medialis (GAM), on the opposite one. These devices were synchronized by the acquisition software BTS EMG-Analyzer. Muscles' MVC and two trials of lunge (AF), step forward lunge (AA) and step backward lunge (DA) were taken. Data were processed with MATLAB and Tracker. VWilcoxon’s effect size for continuous variables and prevalence differences for categorical ones. Age and anthropometric measures were statistically different between the two categories (P < 0.05). No statistically significant differences are observed between the sexes, excluding thigh circumference (P < 0.05). The normalized distances and x-axis ROM between tasks and the y-axis ROM in the second trial (AA), the mean normalized muscle activation of DLTA, RF, and GAM between categories were statistically different (P <0.05). No significant statistical differences in muscle activation patterns were observed between different categories. Each correlation coefficient was interpreted based on a previously described classification using similar variables: 0-0.4 (weak), 0.4-0.7 (moderate), and 0.7-1.0 (strong). Table 1 summarizes the results observed from the correlation, the direction of the arrow stands for the direction of correlation (positive or negative), while the number of arrows is the intensity of correlation (weak, moderate, or strong). It is important to emphasize the negative correlation between lunge time and activation intensity of the LONG muscle, as well as the positive correlation between lunge distance and activation intensity of the GAM muscle. Differences have been observed in some kinematic and electromyographic parameters among categories and tasks. No substantial difference in muscle patterns is observed between different categories. Furthermore, correlations have emerged between muscular activity and spatiotemporal variables of movement: a greater rapidity of movement is associated with greater activity of the LONG, because it is balance responsible. A longer lunge distance is related to a greater activity of the GAM (boosting muscle).

Asymptotic Behavior of Kac Polynomials

We conjecture a formula supported by computations for the valuation of Kac polynomials of a quiver, which only depends on the number of loops at each vertex. We prove a convergence property of renormalized Kac polynomials of quivers when increasing the number of arrows: they converge in the ring of power series, with a linear rate of convergence. Then, we propose a conjecture concerning the global behavior of the coefficients of Kac polynomials. All computations were made using SageMath.

ACCEPTANCE TECHNOLOGY FACTORS OF MOBILE BANKING USAGE BASED ON UTAUT2 MODEL

The aim of this research was to examine factors in UTAUT2was developed by Venkatesh et al.,(2012)(Unified Theory of Acceptance and Use of Technology2) Model which were influenced people in using mobile banking. Constructs used in this research were: performance expectancy, effort expectancy, social influence, facilitating conditions, hedonic motivation, price value, habits, behavioural intention, and use behaviour. This research based on survey research, and data were gathered using questionnaire. The questionnaires were distributed through internet link and it was responded by 199 respondents. The population in this research are every person who used mobile banking. The sample amount used the literature which was said that if the number of arrows in the model is maximum 10, the minimum amount of samplesare 91 samples.Data analysis techniques employed in this research was Partial Least Square–Structural Equation Modeling (PLS-SEM). Results from this research shows that the factors influencing use of mobile banking are habitss and behavioural intention. In other sides, factors that determine the intentions on using mobile banking are habitss and performance expectancy. Results of this research contributes to the identify the factors that should be enhanced by banks to optimize the use of mobile banking and also contributes to the banks customers to make them understand what factors influenced them most on using mobile banking. Theoretical contribution from this paper related to contribution of references about examining the factors affect use of mobile banking in Indonesia from the UTAUT2 model.

ACCEPTANCE TECHNOLOGY FACTORS OF MOBILE BANKING USAGE BASED ON UTAUT2 MODEL

The aim of this research was to examine factors in UTAUT2 was developed by Venkatesh et al.,(2012) (Unified Theory of Acceptance and Use of Technology2) Model which were influenced people in using mobile banking. Constructs used in this research were: performance expectancy, effort expectancy, social influence, facilitating conditions, hedonic motivation, price value, habits, behavioural intention, and use behaviour. This research based on survey research, and data were gathered using questionnaire. The questionnaires were distributed through internet link and it was responded by 199 respondents. The population in this research are every person who used mobile banking. The sample amount used the literature which was said that if the number of arrows in the model is maximum 10, the minimum amount of samples are 91 samples. Data analysis techniques employed in this research was Partial Least Square – Structural Equation Modeling (PLS-SEM). Results from this research shows that the factors influencing use of mobile banking are habitss and behavioural intention. In other sides, factors that determine the intentions on using mobile banking are habitss and performance expectancy. Results of this research contributes to the identify the factors that should be enhanced by banks to optimize the use of mobile banking and also contributes to the banks customers to make them understand what factors influenced them most on using mobile banking. Theoretical contribution from this paper related to contribution of references about examining the factors affect use of mobile banking in Indonesia from the UTAUT2 model.

Onion shallot (&lt;i&gt;Allium ascalonicum L.&lt;/i&gt;) under the conditions of Absheron

Relevance and methods. Currently, heterotic hybrids of shallots, which are a crossroads, are grown in large quantities in the republic, as a result of which there is genetic clogging that is harmful to the local gene pool. To stop this process, it is necessary to expand the assortment of shallots, which in different conditions of Azerbaijan gives a high yield of leaves, bulbs and seeds. The studies were conducted in 2016–2019 at the experimental site of the Absheron Experimental Base of the Genetic Resources Institute of ANAS. For onion and seed production, large bulbs were planted on the sunny side of the field on October 20–25 to a depth of 7 cm in loose soil. The size of the plots is 2.5 m2, the repetition was three times. The feeding area was 60×15 cm. 2 bulbs were planted in each nest. Plants were watered, depending on weather conditions, at least four times a month.Results. The most promising food shallots varieties for cultivation and seed growing in Absheron conditions are: Borchalinsky, Krasnodar G-729, Kuban, Shallot-Vansky. Compared to the standard Ismayillinsky local variety, the distinguished varieties had a number of advantages. Varieties Borchalinsky and Krasnodar G-729 were more precocious. Kuban and Shallot — Vansky varieties were distinguished by productivity, the yield of which exceeded the yield of the standard variety by more than three times. Almost the same weight of the bulb of the studied samples was 0.6–1.8 g higher than the weight of one bulb of the standard variety. Studies have shown that the average number of arrows in the standard variety and in the Krasnodar G-729 variety was less than in the Borchalinsky, Kuban, and Shallot — Vansky varieties. But the Krasnodar G-729 variety was distinguished by a large number of flowers in the inflorescence, due to which the seed yield from one plant and from the plot was significantly higher than that of other varieties. Based on a four-year study of the shallot collection, the most valuable samples for Absheron conditions were identified and selected agricultural practices, the use of which will produce highly resistant seeds.

Winning the mixed team event at major international archery competitions

Major international target archery competitions usually include a 72-arrow ranking round, followed by one-on-one knockout matches conducted over a small number of arrows, until one archer or team remains. This article considers the mixed pair team event that includes teams consisting of one male and one female archer, both using the same bow type. The relation between a team’s place in the ranking round and the likelihood of that team finishing in a top position following the one-on-one knockout matches has been modelled and compared to the results from competitions from 2010 to 2017 inclusive. The team’s ranking round score has been used to indicate the ability of each archer in the matches and to calculate the probability of the team winning sufficient matches in succession to succeed in the competition. The study found that the probability of the team winning the competition decreases exponentially with ranking place. Due to the importance of the ranking round, a team must finish in or near the top seven places in the ranking round for the team to have a reasonable chance at winning a medal.

GENETIC DIVERSITY OF INTERSPECIFIC HYBRIDS OF THE GENUS ALLIUM L.

Selection based on interspecific hybridization of fundamentally new plant forms with a unique combination of genetic material allows expanding the scope of genotypic and phenotypic variability. In this work the comparative analysis of plants of interspecific hybrids of genus Allium L. from various inbred descendants of combinations of crossing of species A. cepa х A. vavilovii and A. cepa х A. fistulosum on selection traits is carried out.Forms were identified: by mass of the bulb more than 100 g; with contrasting coloration of dry cover scales bulbs; by the index of the shape of the bulb; on the resistance to peronosporosis of plants of the first year of vegetation and seed plants; by the number of arrows; height of the arrow; on seed production with a sufficiently high percentage of fertile plants. Plants of interspecific hybrids of onions formed bulbs weighing from 20 to 120 g, with white, golden-yellow, dark golden-yellow, brownish and dark purple color of dry covering scales of a bulb. Plants of interspecific hybrids of onions were flat and round-flat shape of the bulb with the frequency of symptoms ranging from 6.9 to 93.3% and from 11.7 to 93.3%. In a phytopathological evaluation of interspecific hybrids of onions the first year of vegetation identified plants with resistance to downy mildew is from 0 to 4.0 points. Was studied the frequency of occurrence of plants in the progenies weight, colour, bulb type, number, height of the seedstalk, seed productivity and resistance to downy mildew. The increase of genetic diversity in onion plants obtained on the basis of interspecific hybridization, backcrossing and inbreeding is shown.

Analysis of mixed correlated bivariate zero-inflated count and (k, l)-inflated beta responses with application to social network datasets

ABSTRACTThis paper presents a new model that monitors the basic network formation mechanisms via the attributes through time. It considers the issue of joint modeling of longitudinal inflated (0, 1)-support continuous and inflated count response variables. For joint model of mentioned response variables, a correlated generalized linear mixed model is studied. The fraction response is inflated in two points k and l (k < l) and a k and l inflated beta distribution is introduced to use as its distribution. Also, the count response is inflated in zero and we use some members of zero-inflated power series distributions, hurdle-at-zero, members of zero-inflated double power series distributions and zero-inflated generalized Poisson distribution as our count response distribution. A full likelihood-based approach is used to yield maximum likelihood estimates of the model parameters and the model is applied to a real social network obtained from an observational study where the rate of the ith node’s responsiveness to the jth node and the number of arrows or edges with some specific characteristics from the ith node to the jth node are the correlated inflated (0, 1)-support continuous and inflated count response variables, respectively. The effect of the sender and receiver positions in an office environment on the responses are investigated simultaneously.

The role of competitiveness in the Prisoner’s Dilemma

Competitiveness is a relevant social behavior and in several contexts, from economy to sport activities, has a fundamental role. We analyze this social behavior in the domain of evolutionary game theory, using as reference the Prisoner’s Dilemma. In particular, we investigate whether, in an agent population, it is possible to identify a relation between competitiveness and cooperation. The agent population is embedded both in continuous and in discrete spaces, hence agents play the Prisoner’s Dilemma with their neighbors. In continuous spaces, each agent computes its neighbors by an Euclidean distance-based rule, whereas in discrete spaces agents have as neighbors those directly connected with them. We map competitiveness to the amount of opponents each agent wants to face; therefore, this value is used to define the set of neighbors. Notably, in continuous spaces, competitive agents have a high interaction radius used to compute their neighbors. Instead, since discrete spaces are implemented as directed networks, competitiveness corresponds to the out-degree of each agent, i.e., to the number of arrows starting from the considered agent and directed to those agents it wants to face. Then, we study the evolution of the system with the aim to investigate if, and under which conditions, cooperation among agents emerges. As result, numerical simulations of the proposed model show that competitiveness strongly increases cooperation. Furthermore, we found other relevant phenomena as the emergence of hubs in directed networks.

The number of arrows in the quiver of tilting modules over a path algebra of Dynkin type

The number of arrows in the quiver of tilting modules over a path algebra of Dynkin type

Synchrony-Breaking Bifurcation at a Simple Real Eigenvalue for Regular Networks 1: 1-Dimensional Cells

We study synchrony-breaking local steady-state bifurcation in networks of dynamical systems when the critical eigenvalue is real and simple, using singularity theory to transform the bifurcation into normal form. In a general dynamical system, a generic steady-state local bifurcation from a trivial state is transcritical. In the presence of symmetry, a pitchfork is also possible generically. Network structure introduces constraints that may change the generic behavior. We consider regular networks, in which all cells have the same type and all arrows have the same type, and every cell receives inputs from the same number of arrows. A characterization of all smooth admissible maps permits a singularity-theoretic analysis based on Liapunov–Schmidt reduction. Assuming that the cells have 1-dimensional internal dynamics, we give conditions on the critical eigenvectors of the linearization and its transpose that determine when a generic bifurcation is transcritical, pitchfork, or more degenerate. We prove that for all regular n-cell networks, such bifurcations are generically n-determined. In the path-connected case, this is improved to $(n-1)$-determined. In bidirectional networks, generic bifurcation is transcritical or pitchfork, but the role of symmetry is minor. In the general case, degenerate cases can occur: the network must have at least 4 cells (5 in the path-connected case). We give examples of networks for which generic bifurcations are degenerate, including a 6-cell network with a normal form that is determined only at degree 6 and a path-connected 5-cell network with a normal form that is determined only at degree 4.

Inference in qualitative probabilistic networks revisited

Qualitative probabilistic networks (QPNs) are basically qualitative derivations of Bayesian belief networks. Originally, QPNs were designed to improve the speed of the construction and calculation of these networks, at the cost of specificity of the result. The formalism can also be used to facilitate cognitive mapping by means of inference in sign-based causal diagrams. Whatever the type of application, any computer based use of QPNs requires an algorithm capable of propagating information throughout the networks. Such an algorithm was developed in the 1990s. This polynomial time sign-propagation algorithm is explicitly or implicitly used in most existing QPN studies. This paper firstly shows that two types of undesired results may occur with the original sign-propagation algorithm: the results can be (1) less specific than possible at the given level of abstraction, or, more seriously (2) incorrect. Secondly, the paper identifies the causes underlying these problems. Thirdly, this paper presents an adapted sign-propagation algorithm. The worst-case running time of the adapted algorithm is still polynomial in the number of arrows. The results of the new algorithm have been compared with those of the original algorithm by applying both algorithms to a real-life constructed cognitive map. It is shown that the problems of the original algorithm are indeed prevented with the adapted algorithm.

Noetherian quivers

Noetherian quivers have been studied and characterized (when the number of arrows is finite) by Höinghaus and Richter in [10]. In this paper we give a characterization of noetherian quivers in the most general case in Theorem 3.6. We prove that a quiver is noetherian if and only if the rooted tree associated to any vertex satisfies some sort of finiteness condition, if and only if every finitely generated representation over a noetherian ring has an injective cover.

On the ordinary quiver of the symmetric group over a field of characteristic 2

Let [Sfr ]n and [Afr ]n denote the symmetric and alternating groups of degree n∈ℕ respectively. Let p be a prime number and let F be an arbitrary field of characteristic p. We say that a partition of n is p-regular if no p (non-zero) parts of it are equal; otherwise we call it p-singular. Let SλF denote the Specht module corresponding to λ. For λ a p-regular partition of n let DλF denote the unique irreducible top factor of SλF. Denote by ΔλF =DλF ↓[Afr ]n its restriction to [Afr ]n. Recall also that, over F, the ordinary quiver of the modular group algebra FG is a finite directed graph defined as follows: the vertices are labelled by the set of all simple FG-modules, L1, ..., Lr, and the number of arrows from Li to Lj equals dimFExtFG(Li, Lj). The quiver gives important information about the block structure of G.

Algebras Whose Tits Form Weakly Controls the Module Category

An important invariant associated to a finite dimensional algebra is its Tits quadratic form. This invariant has been extensively used in the representation theory of algebras to determine the representation type of Ž w x. an algebra see 4, 11, 16 , to determine the classes of indecomposable Ž w x. modules in the Grothendieck group see 9, 11, 20 , and as a tool in a wide Ž w x. range of applications see 16, 21 . Let A s kQrI be a basic, finite dimensional algebra over an algebraically closed field k. We will assume that Q is connected and without 4 Ž . oriented cycles. We denote by Q s 1, . . . , n resp. Q the set of vertices 0 1 Ž . resp. arrows of Q. Left A-modules are considered as representations of Ž w x. Q satisfying the ideal I for this point of view, see 12 . By S we denote i the simple representation associated with the vertex i g Q . Observe that 0 1 Ž . dim Ext S , S is the number of arrows from i to j in Q. The Tits form k A i j

CHECKING ON THE ARROWS

The quotation from Henry Longfellow's The Arrow and the Song: first appeared in the Target 2000 column in the first issue of the relaunched Online &amp; CDROM Review in 1993. Since then a number of arrows have been aimed at developments that could be expected by the turn of the century. As this column was envisaged as a “floating Delphi”, this seems an appropriate point in the run‐up to the millennium to review the projections made to date. Below they have been reviewed and grouped, and it is hoped that in the coming months the authors may wish to expand or revise their original thoughts. The year, volume, issue and page numbers for the journal reference are given after the author’s name.

Quasitilted algebras admit a preprojective component

Quasitilted algebras are generalizations of tilted algebras. As a main result we show here that the Auslander-Reiten quiver of such an algebra has a preprojective component Let k be an algebraically closed field and A be a finite-dimensional k-algebra. We denote by mod A the category of finitely generated left A-modules. By 1A we denote the Auslander-Reiten quiver of A. Recall that the vertices of 1A correspond to the isomorphism classes of indecomposable finitely generated A-modules. The number of arrows from an indecomposable A-module X to an indecomposable Amodule Y is the dimension of the k-vector space rad(X,Y)/rad2(X,Y), where rad(-, -) denotes the Jacobson radical of mod A. We denote by TX = DTr X the Auslander-Reiten translate of the indecomposable A-module X. This is defined for each indecomposable module, and in case X is non-projective the translate TX will be indecomposable and non-injective. Dually there is defined T-X = TrDX. A connected component P of 1A is called a preprojective component if P does not contain an oriented cycle and each X c P is of the form T-rp for some r c N and an indecomposable projective A-module P. For details see [ARS]. The existence of preprojective components has been established for various classes of algebras such as tilted algebras [St] or algebras satisfying the separation condition [B]. It is well known that tilted algebras may have several preprojective components. One of the important features of an indecomposable module X lying in a preprojective component is that X is homologically trivial, i.e. ExtX(X, X) = 0 for i > 0 and EndAX = k and that its isomorphism class is uniquely determined by the composition factors. Also these modules can be constructed easily by the socalled knitting procedure. Quasitilted algebras have been introduced and investigated in [HRS2]. Recall that a finite-dimensional k-algebra A is called a quasitilted algebra if there exist a hereditary abelian k-category XH and a tilting object T c XH such that A = End'HT. In this article we will not work with this definition but rather with the homological characterization established in [HRS2]. We will use the following notation. For Received by the editors March 31, 1995 and, in revised form, November 10, 1995. 1991 Mathematics Subject Classification. Primary 16G10, 16E10.

近傍ポインティング電力流の図示による平面大地上の八木・宇田アンテナの考察

Because of their simple geometry, Yagi-Uda antennas have been widely used in various fields. There are a variety of techniques to analyze the near field of antennas. To examine how electromagnetic wave energy propagates around antennas, we calculated Poynting power flow. The strength of Poynting power flow is expressed by the number of arrows. In this paper, we calculated Poynting's vectors for a three-element Yagi-Uda antenna using parameters of maximum gain and maximum F/B ratio, when placed on a flat ground (wet and dry ground) and also on a perfect conductor plate. As a result, it is found that the rotating power flow can be observed in the case of specific height and above the feeding element due to the effects of reflected wave.

A BACKWARDS AND FORWARDS LOOK

It is now a year since this column was launched and a number of arrows have been shot in the air … aimed at hitting the target labelled the year 2000. In the first column (vol. 17 no. 1) Charles Oppenheim (University of Strathclyde) commented that Target 2000 would be one way of learning how good information professionals are at predicting the future. So far, the Oppenheim award goes to Charles Citroen (TNO Policy Research, The Netherlands) whose prediction at this time one year ago was that ‘online hosts like the present ones will probably disappear.’ Within a few months of this prediction, Dialog and Data‐Star had announced their merger.

A reply to Haridimos Tsoukas, the radical critic of radical critique

In conclusion, Haridimos Tsoukas has fired a number of arrows at both Critical Systems Thinking and TSI. In this Research Note, I have argued that some miss the target, and some hit, but none score a bull's-eye. In particular, I have suggested that many of Tsoukas' theoretical criticisms have already been discussed in the Critical Systems literature, and the main issues have been dealt with. What is new, however, is his claim that, in order for our systems interventions to be useful, they must accept the “dominant rationalities” of management. In direct contrast with this I have asked, “useful in whose terms?” If we are in the business of transforming organizations, what better way is there to start than to challenge dominant rationalities and build alternatives?