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Showing papers by "University of Texas at Arlington published in 1975"


Journal ArticleDOI
TL;DR: In this paper, the effect of free-stream turbulence on heat transfer from heated cylinders placed normal to an air stream was investigated and a correlation equation was presented that enables the stagnation point heat transfer as a function of turbulence intensity to be determined.

141 citations


Journal ArticleDOI
TL;DR: In this article, the authors examined inmates at a federal correctional institution for their criterion of what constitutes overcrowding and found that inmates who were housed under highly crowded conditions exhibited less tolerance of overcrowding than did those who were being housed under relatively less crowded conditions.
Abstract: Inmates at a federal correctional institution were examined for their criterion of what constitutes overcrowding. In general, inmates who were housed under highly crowded conditions exhibited less tolerance of overcrowding than did those who were housed under relatively less crowded conditions. Higher crowding also yielded more negative affective responses to the physical environment. This relationship existed only with respect to a social-density measure of crowding and not for a spatial-density measure.

70 citations


Journal ArticleDOI
TL;DR: Mood changes instigated by the learned helplessness task 'were assessed to evaluate whether they are similar to those mood states reported to be salient characteristics of depression.
Abstract: The present study was designed to assess the mood correlates of learned helplessness in human subjects. One group of subjects was pretreated with a series of inescapable aversive tones, and the degree of debilitation was measured on a subsequent solvable anagram task. These subjects were compared with a group pretreated with escapable aversive tones. Results replicated the learned helplessness effect: The group pretreated with inescapable tones demonstrated greatly debilitated performance at solving anagrams relative to the escapable group. The learned helplessness group also reported greater depression, anxiety, and hostility relative to the group pretreated with escapable tones. Moreover, a correlational analysis comparing self-ratings of helplessness during the experiment and a general 'emotionality index, composed of the sum of scores on the three affect scales, revealed a high association between the two variables (r= .63, p< .01). Seligman (1975) has proposed that the learned helplessness concept may serve as a model for reactive depression in man. If this model is valid, he has speculated that the experimental procedure for producing helplessness may yield symptoms associated with mild depression. The present study was designed to provide a test of the validity of this model. Mood changes instigated by the learned helplessness task 'were assessed to evaluate whether they are similar to those mood states reported to be salient characteristics of depression. The investigation utilized an experimental paradigm similar to that employed by Hiroto and Seligman (1975) for producing cross-modal helplessness. The Multiple Affect Adjective Check List (Zuckerman, Lubin, & Robins, 1965) was administered at various times during the experiment to gauge mood change. This check list elicited self-reports of depression, anxiety, and hostility.

66 citations


Journal ArticleDOI
TL;DR: A hybrid version of the Haar and Walsh-Hadamard transforms (HT and WHT) called Hadamard-Haar transform (HHT), is defined and developed and its utility and effectiveness are compared with other discrete transforms on the basis of some standard performance criteria.
Abstract: A hybrid version of the Haar and Walsh-Hadamard transforms (HT and WHT) called Hadamard-Haar transform (HHT),is defined and developed. Efficient algorithms for fast computation of the (HHT), and its inverse are developed. (HHT)r is applied to digital signal and image processing and its utility and effectiveness are compared with other discrete transforms on the basis of some standard performance criteria.

55 citations


Journal ArticleDOI
TL;DR: In this paper, the authors focus on the three types of legitimacies of a political office holder: structural, ideological and personal, and apply them to Nixon's 1973 Watergate apologies in an attempt to discover why, in that instance, apology failed.
Abstract: This article is concerned with the way apologetics aids politicians in maintaining their authority. Using political systems theory, it focuses upon the three types of legitimacies of a political office holder: structural, ideological, and personal. Application of this theory is made to Nixon's 1973 Watergate apologies in an attempt to discover why, in that instance, apology failed.

50 citations


Journal ArticleDOI
TL;DR: In this paper, a 2x4 split plot factorial experiment investigated the effects of person vs. stimulus attribution and response category (i.e., accomplishments, opinions, emotions and actions) on requests for consistency, consensus and distinctiveness.
Abstract: A 2x4 split plot factorial experiment investigated the effects of person vs. stimulus attribution and response category (i.e., accomplishments, opinions, emotions and actions) on requests for consistency, consensus and distinctiveness informa tion. Requests for all three types of information were signifi cantly affected by both independent variables, alone and in interaction. Person attribution led to more requests for con sistency and distinctiveness information than stimulus attribu tion, while stimulus attribution led to more requests for consensus. Under person attribution, actions and accomplishments produced more consistency requests than emotions and opinions, while accomplishments produced greatest concern with distinc tiveness. Under stimulus attribution, accomplishments led to greatest concern with consensus.

38 citations


Journal ArticleDOI
TL;DR: The observation suggests a continual increase in the formation of deoxyhemoglobulin S polymers rather than a sudden transition from a homogeneous solution ofdeoxyhemoglobin S molecules to a solid gel.

38 citations


Journal ArticleDOI

37 citations


Journal ArticleDOI
TL;DR: In Colombia, the majority of social work positions in Colombia are labor-oriented and require a different kind of competence from those in the United States as mentioned in this paper, such as a superficial understanding of emotional problems and psychotherapy is useful in some aspects of their work.
Abstract: tively large groups of people. They also must know something about the organization of work in the institutions they serve, as well as personnel planning and personnel policies. While a superficial understanding of emotional problems and psychotherapy is useful in some aspects of their work, such as dealing with alcoholic employees, who pose as significant a problem in Colombian industry as they do in the United States, those who are educated as treatment-oriented social workers in the United States find few markets for their skills in Colombia. This is because nearly half of the social work positions in Colombia are labor-oriented and require a different kind of competence. Governmental programs do not generally involve social workers in the kinds of intensive therapy with individuals and groups often encountered in United States agencies.

31 citations



Journal ArticleDOI
01 Aug 1975-Ecology
TL;DR: Investigations of growth, reproduction, life cycle and the effects of heated effluent showed that each population of Plhysa virgata Gould had three generations/year, which is remarkably similar even though one was in an area affected by thermal effluent.
Abstract: Abstr-act Plhysa virgata Gould is the common pond snail of north central Texas From two natural populations, one affected by heated discharge from a power plant in Lake Arlington, Texas, regular samples were collected from August 1972 until April 1974 Investigations of growth, reproduction, life cycle and the effects of heated effluent showed that each population had three generations/year More northern physid populations have a simple annual pattern or at most two complete generations/year Even without artificially elevated water temperatures the longer growing seasons which occur in southwestern USA allow P iirgata populations to achieve three generations/year The autecology of these two P virgata populations was remarkably similar even though one was in an area affected by thermal effluent Observed differences include a more rapid rate of growth of the second generation in the discharge area (probably as a result of higher summer water temperatures) and a significant decrease in mean number of eggs per mass laid by the discharge population

Book ChapterDOI
01 Jan 1975
TL;DR: This chapter is devoted to the study of the Walsh-Hadamard transform (WHT), which is perhaps the most well-known of the nonsinusoidal orthogonal transforms.
Abstract: This chapter is devoted to the study of the Walsh-Hadamard transform (WHT), which is perhaps the most well-known of the nonsinusoidal orthogonal transforms. The WHT has gained prominence in various digital signal processing applications, since it can essentially be computed using additions and subtractions only. Consequently its hardware implementation is also simpler.


Journal ArticleDOI
TL;DR: The effects of two different interstimulus interval lengths on short- and long-term habituation of autonomic components of the orienting response were investigated and suggest the presence of two active habituation processes.
Abstract: The effects of two different interstimulus interval lengths (20-sec vs. 100-sec) on short- and long-term habituation of autonomic components of the orienting response (OR) were investigated in a study employing 24 subjects. Results indicated that the 20-sec interval length was associated with increased short-term habituation and decreased long-term habituation, relative to the longer, 100-sec interval length. There was also a statistically near-significant association between interval length and magnitude of the OR to a subsequently presented novel dishabituating stimulus. These results suggest the presence of two active habituation processes.

Journal ArticleDOI
TL;DR: In this paper, the photochemical interaction of (CH3)2Te and an appropriate perfluoroalkyl iodide in a vycor tube at 310 nm wavelength is described.



Journal ArticleDOI
TL;DR: The present paper generalizes (and unifies) a number of known uniqueness criteria to cover cases when (t0, x0) lies on the boundary of D.
Abstract: Various criteria are known for assuring uniqueness of the solution of a system ofn ordinary differential equations,x′ = f(t, x), with initial conditionx(t0) = x0. Most of these involve some sort of relaxed Lipschitz condition onf(t, x), with respect tox, valid on an open setD ⊂ R1+n which contains the point (t0, x0). The present paper generalizes (and unifies) a number of known uniqueness criteria to cover cases when (t0, x0) lies on the boundary ofD.

Journal ArticleDOI
TL;DR: In this article, the authors investigate the relationship between the behavior pattern of leaders and the willingness of their subordinates to share information and find that leaders who gave greater emphasis to their personal relationships with subordinates in their leadership patterns were found to have subordinates with greater willingness to share the information than leaders who were not oriented to personal relationships.

Journal ArticleDOI
TL;DR: Pertinent properties of (GHT) r, a new class of discrete orthogonal transforms called generalized Haar transforms, are developed and its utility and performance is compared with those of other discrete transforms such as Walsh-Hadamard, Haar, slant, Fourier, Karhunen-Loeve etc.

Journal ArticleDOI
TL;DR: Kyte et al. as discussed by the authors conducted a study to examine the provision of concrete encaseworkers who saw vironmental modification by caseclients regularly and on a face-to-face workers associated with one of the basis.
Abstract: Richard M. Grinnell, Jr., Ph.D., is Assistant Professor, Graduate School of Social Work, University of Texas, Arlington, Texas. Nancy S. Kyte, MSSW, is Assistant Professor, College of Social Work, University of South Carolina, Columbia, South Carolina. STUDY DESIGN AND INSTRUMENT Recent years have witnessed a reagency's Division of Family and Chil newed interest among caseworkers in dren's Services. This division is com the close association between the indiprised of thirteen different services: vidual psyche and the social milieu. child protection; services to unwed Reflecting this has been a growing parents; assessment, brief service; concern over the significance of social self-support counseling; family coun vulnerability and the need for more seling; substitute care, foster care; effective, efficient, and responsive enservices for the handicapped; child vironmental services. Significantly, care, intake and institutional service; environmental modification, once relesubstitute care, institutional care; par gated to an obscure corner of caseent service; adoption; complementary work theory and practice, is now reservice; and purchase of care and ceiving wider exposure and attention services, in the literature.1 And yet, despite the conceptual advances that have been made, social workers still know rela tively little about how environmental modification is being used today. Methodologically, casework actions Services were selected on the basis upon and within the social environof the following criteria: in each ser ment remain unrecorded.2 In response vice, the caseworkers provided direct to this dearth of quantifiable data, a practice services—that is, they were research study was recently conducted not employed in supervisory or admin to explore the use in casework pracistrative capacities—and were likely tice of concrete environmental modifito receive at least one new client dur cation—that is, the provision of speing a six-week period. Seven (54 per cific services such as money, referral, cent) of the division's thirteen ser food, or shelter as differentiated from vices met these requirements: child effecting changes in the sociopsychoprotection; services to unwed parents; logical environment. This article deassessment, brief service; self-support scrihes the results of that study, highcounseling; family counseling; substi lighting the significance of the finding tute care, foster care; and services that concrete environmental modificafor the handicapped, tion is a much more intricate intervenOnce it was determined that a par tive technique than is widely believed, ticular service met the necessary cri A major purpose of the study was to teria for participation in the study, examine the provision of concrete encaseworkers were selected who saw vironmental modification by caseclients regularly and on a face-to-face workers associated with one of the basis. Of the 111 caseworkers who largest public welfare agencies in the were thus identified as eligible for in Midwest. More specifically, the study elusion in the sample, 27 (24 percent) was undertaken to identify the circumagreed to participate in the study on a stances surrounding the use of convoluntary basis. This is a high propor crete environmental modification— tion of volunteers for an agency of how and by whom it is initiated, this size, in which caseworkers carry where, how often, and with whom it heavy workloads and generally lack is used, around what presenting probtime to participate in outside studies, lems, and for how long—and to idenOf the 27 participating caseworkers, tify any significant differences that 10 were MSWs and 17 were BAs or might exist in the provision of conBSWs. The mean age for the case crete environmental modification by workers was 33 years, while the me MSW caseworkers and non-MSW dian age was 29 years. Sixteen (59 caseworkers. A total of 27 caseworkers percent) of the caseworkers were fe participated in the study and, beginmale and 11 (41 percent) were ning in January 1974, recorded their male. Twenty-five (93 percent) were activities with 72 clients for a period white and 2 (7 percent) were black, of 61 days. The caseworkers in the study sample The study was conducted in the had an average of 6.3 years of paid

Journal ArticleDOI
TL;DR: In this article, six groups of rats were run in a straight alley and groups were given 46 trials to large (L) or small (S) reward, followed by multiple shifts so that groups given reinforcement patterns LLLL, LSSL, SLSL, SSSS, SLLS, and LSLS were formed.
Abstract: Six groups of rats were run in a straight alley. Groups were given 46 trials to large (L) or small (S) reward. This was followed by multiple shifts so that groups given reinforcement patterns LLLL, LSSL, SLSL, SSSS, SLLS, and LSLS were formed. A significant PCE was achieved on the second and third shifts to L. In extinction, groups terminating in L were least resistant to extinction.



Book ChapterDOI
01 Jan 1975
TL;DR: This chapter develops a fast algorithm, called the fast Fourier transform (FFT), which significantly reduces the number of arithmetic operations and memory required to compute the DFT (or its inverse).
Abstract: The main objective of this chapter is to develop a fast algorithm for efficient computation of the DFT. This algorithm, called the fast Fourier transform (FFT), significantly reduces the number of arithmetic operations and memory required to compute the DFT (or its inverse). Consequently, it has accelerated the application of Fourier techniques in digital signal processing in a number of diverse areas. A detailed development of the FFT is followed by some numerical examples which illustrate its applications.


Journal ArticleDOI
TL;DR: In this article, an analysis of the nonlinear modes of vibration of a pretwisted nonuniform cantilevered blade of unsymmetrical cross-section mounted on the periphery of a rotating disk is presented.


Journal ArticleDOI
TL;DR: It is emphasised that the steadiness test serve not as diagnostic tools, but as quantitative instruments reliable for measuring upper-extremity tremor, as well as as qualitative assessments providing an indication that the tests are valid.
Abstract: A battery of steadiness tests measuring several different aspects of upper-extremity tremor has been developed to objectively evaluate tremor in clinical trials. 40 young-adult normal subjects, 20 older-adult normal subjects, 10 patients having Parkinson's disease and 10 patients having multiple sclerosis served as subjects to evaluate the battery of tests. For normal subjects, no important differences were found between performance by the dominant and the nondominant body sides. Males were found to be significantly less steady than females. Although tests conducted with the arm unsupported were invariant with age, tests conducted with the arm supported showed significant performance decrements with increasing age. In a recent drug trial, performance in the steadiness-test battery was found to correspond closely with qualitative assessments providing an indication that the tests are valid. It is emphasised that the steadiness test serve not as diagnostic tools, but as quantitative instruments reliable for measuring upper-extremity tremor.

Book ChapterDOI
01 Jan 1975
TL;DR: The subject of pattern recognition can be divided into two main areas of study: feature selection and classifier design, as summarized in Fig. 10.1.
Abstract: The subject of pattern recognition can be divided into two main areas of study: (1) feature selection and (2) classifier design, as summarized in Fig. 10.1. x(t) is a signal that belongs to K classes denoted by C 1 , C 2 ,..., C K .