Showing papers by "Temple University published in 1977"

The asymptotic theory of extreme order statistics

Abstract: . Let X j denote the life length of the j th component of a machine. In reliability theory, one is interested in the life length Z n of the machine where n signifies its number of components. Evidently, Z n = min (X j : 1 ≤ j ≤ n). Another important problem, which is extensively discussed in the literature, is the service time W n of a machine with n components. If Y j is the time period required for servicing the j th component, then W n = max (Y j : 1 ≤ j ≤ n). In the early investigations, it was usually assumed that the X's or Y's are stochastically independent and identically distributed random variables. If n is large, then asymptotic theory is used for describing Z n or W n . Classical theory thus gives that the (asymptotic) distribution of these extremes (Z n or W n ) is of Weibull type. While the independence assumptions are practically never satisfied, data usually fits well the assumed Weibull distribution. This contradictory situation leads to the following mathematical problems: (i) What type of dependence property of the X's (or the Y's) will result in a Weibull distribution as the asymptotic law of Z n (or W n )? (ii) given the dependence structure of the X's (or Y's), what type of new asymptotic laws can be obtained for Z n (or W n )? The aim of the present paper is to analyze the recent development of the (mathematical) theory of the asymptotic distribution of extremes in the light of the questions (i) and (ii). Several dependence concepts will be introduced, each of which leads to a solution of (i). In regard to (ii), the following result holds: the class of limit laws of extremes for exchangeable variables is identical to the class of limit laws of extremes for arbitrary random variables. One can therefore limit attention to exchangeable variables. The basic references to this paper are the author's recent papers in Duke Math. J. 40 (1973), 581–586, J. Appl. Probability 10 (1973, 122–129 and 11 (1974), 219–222 and Zeitschrift fur Wahrscheinlichkeitstheorie 32 (1975), 197–207. For multivariate extensions see H. A. David and the author, J. Appl. Probability 11 (1974), 762–770 and the author's paper in J. Amer. Statist. Assoc. 70 (1975), 674–680. Finally, we shall point out the difficulty of distinguishing between several distributions based on data. Hence, only a combination of theoretical results and experimentations can be used as conclusive evidence on the laws governing the behavior of extremes.

Large-distance and long-time properties of a randomly stirred fluid

Abstract: Dynamic renormalization-group methods are used to study the large-distance, long-time behavior of velocity correlations generated by the Navier-Stokes equations for a randomly stirred, incompressible fluid. Different models are defined, corresponding to a variety of Gaussian random forces. One of the models describes a fluid near thermal equilibrium, and gives rise to the usual long-time tail phenomena. Apart from simplifying the derivation of the latter, our methods clearly establish their universality, their connection with Galilean invariance, and their analytic form in two dimensions, $\ensuremath{\sim}\frac{{(logt)}^{\ensuremath{-}\frac{1}{2}}}{t}$. Nontrivial behavior results when the model is formally continued below two dimensions. Although the physical interpretation of the Navier-Stokes equations below $d=2$ is unclear, the results apply to a forced Burger's equation in one dimension. A large class of models produces a spectral function $E(k)$ which behaves as ${k}^{2}$ in three dimensions, as expected on the basis of equipartition. However, nonlinear effects (which become significant below four dimensions) control the infrared properties of models which force the Navier-Stokes equations at zero wave number.

The Origin of German Tragic Drama

Abstract: Walter Benjamin is widely acknowledged as amongst the greatest literary critics of this century, and The Origin of German Tragic Drama is his most sustained and original work. Indeed, Georg Lukacs - one of the most trenchant opponents of Benjamin's aesthetics - singled out this work as one of the main sources of literary modernism in the twentieth century. The Origin of German Tragic Drama begins with a general theoretical introduction on the nature of the baroque art of the sixteenth and seventeenth centuries, concentrating on the peculiar stage-form of the royal martyr dramas called Trauerspiel. Benjamin also comments on the engravings of Durer, and the theatre of Shakespeare and Calderon. Baroque tragedy, he argues, was distinguished from classical tragedy by its shift from myth into history. The characteristic atmosphere of the Trauerspiel was consequently 'melancholy'. The emblems of baroque allegory point to the extinct values of a classical world that they can never attain or repeat. Their suggestive power, however, remains to haunt subsequent cultures, down to this century.

Social and Private Rates of Return from Industrial Innovations

Abstract: I. Introduction, 221.—II. The sample of innovations, 222.—III. Estimation of social benefits: product innovations used by firms, 222.—IV. Parallel innovative efforts, time horizon, and rates of return, 226.—V. Product innovations used by households, 229.—VI. Process innovations, 231.—VII. Social and private rates of return, 233.—VIII. Factors associated with the gap between social and private rates of return, 235.—IX. Unemployment, repercussions on other markets, and future changes in technology, 238.—X. Conclusion, 239.

Cenozoic geology of the Yerington district, Nevada, and implications for the nature and origin of Basin and Range faulting

Abstract: In the Yerington district, western Nevada, pre-Tertiary rocks are overlain by an Oligocene ignimbrite sequence and Miocene andesites. Basin and Range normal faulting began in Miocene time, as andesitic volcanism died out (17 to 18 m.y. ago), and has continued to the present. The faults dip east and are curved, concave upward, with net displacements in a nearly east-west direction. Movement on the curved faults has resulted in steep westward tilting of the Miocene andesites and of all older rocks. Alluvium and 8- to 11-m.y.-old basalt flows deposited during the period of faulting are tilted gently west. The oldest faults, which dipped steeply east when they were active, are now inactive and dip gently eastward as a result of westward tilting on other faults. Younger faults dip more steeply east, and the youngest faults, those responsible for present Basin and Range topography, are the steepest. More than 100 percent of east-west extension has taken place across the district because of normal faulting. The rate of extension was most rapid between 17 and 11 m.y. ago and was slower after 11 m.y. ago. The extension is deep seated rather than thin skinned and apparently involves thinning of the crust. Several theories of origin for Basin and Range structure can be rejected because of the field data at Yerington, and the theory that Basin and Range structure was caused by a continental spreading axis best fits the data. Basin and Range spreading seems to have been most active between the projections of the Mendocino and Murray fractures. It may have first started south of the Great Basin, when these fractures were farther south relative to the continent and when the oceanic spreading axis that had been between these fractures was interacting with the continent.

Gastric carcinoma. A pathobiological classification.

Abstract: Gastric carcinomas had various pathological features. Based on patterns of growth and invasiveness, however, they fell into two types; expanding type and infiltrative type. These types were readily recognizable histologically: expanding carcinomas grew en masse and by expansion, resulting in the formation of discrete tumor nodules, whereas in infiltrative carcinoma tumor cells invaded individuality. Both types showed varying degrees of cell maturation, but glands were much more common in expanding carcinoma. The difference in growth pattern was reflected partly by gross appearance of the tumors. These two types of carcinoma appeared to be different in their histogenetic origins. Intestinal metaplasia probably played a role in the development of expanding, but not infiltrative, carcinoma. There were differences also in the sex and age of the patients, survival rate, and epidemiological distribution. Thus, this classification provided a simple basis for evaluation of various aspects of gastric cancer.

Orbital electron capture by the nucleus

Abstract: The theory of nuclear electron capture is reviewed in the light of current understanding of weak interactions. Experimental methods and results regarding capture probabilities, capture ratios, and EC/Beta(+) ratios are summarized. Radiative electron capture is discussed, including both theory and experiment. Atomic wave function overlap and electron exchange effects are covered, as are atomic transitions that accompany nuclear electron capture. Tables are provided to assist the reader in determining quantities of interest for specific cases.

The Home Advantage

Abstract: This investigation confirms the existence of a home advantage in organized sports; however, it refines and extends that knowledge in a number of ways. The home advantage is most pronounced in the indoor sports of ice hockey and basketball; least so, in the outdoor sports of baseball and football. More effective offensive rather than defensive action is the major factor in the home advantage among all sports. Playing at home or away from home is as strong a correlate of a team's performance as is the average quality of its players. Finally, inferences from the data, as well as more direct observations on audience size and its relationship to performance and outcome, justify the conclusion that the home advantage is almost totally independent of visitor fatigue and lack of familiarity with the home playing area; it is mainly attributable to the social support of the home audience. This study relates to a perspective on group support whose origin is embodied in the work of Emile Durkheim. While Durkheim is best known for his stress on the inhibiting and restraining character of the moral community, he also finds within it the ultimate source of human energy and inspiration. This side of his thought is particularly evident in remarks concerning the stimulating effects of social congregation (240): There are occasions when the strengthening and vivifying action of society is especially apparent. In the midst of an assembly animated by a common passion, we become susceptible of acts and sentiments of which we are incapable when reduced to our own forces; and when the assembly is dissolved and when, finding ourselves alone again, we fall back to our ordinary level, we are then able to measure the height to which we have been raised above ourselves (b, 240). For Durkheim, then, the very conditions which regulate man's passions and conduct are those which inspire and propel him to the most extraordinary levels of achievement. The purpose of the present investigation is to determine why, and to what extent, this is so. We will approach this problem by considering the effect of community support on the performance of local athletic teams. We also propose to determine the sources of this support and to gauge its influence on performance in relation to the effects of other determinants. To do this, we examine a phenomenon that is well-recognized but about which little is really known, namely, the home advantage in organized sports. By studying a phenomenon within the sphere of sport, we learn something about determining elements in the fate of those engaged in more serious undertakings. Although we cannot demonstrate the truth of this assertion, there seems to *The authors would like to acknowledge the assistance of Charles Bosk, Paul Collard, Robert Greene, and Russell White. We also profited from comments by William Parish and Dean MacCannell.

Metabolism and function of human platelets washed by albumin density gradient separation.

Abstract: A method for washing platelets by albumin density gradient separation, originally designed for the study of platelet coagulant activities, has been modified for platelet aggregation and metabolic studies. Platelets are sedimented into a continuous density gradient of isosmolar albumin containing apyrase to protect them from clumping and physical injury and are resuspended in calcium-free Tyrode's solution. The mean recovery of platelets after two separations relative to platelet-rich plasma (PRP) was 90.3%. When small amounts of plasma were added to washed platelet suspensions, aggregation and release of [14C]5-hydroxytryptamine (5HT) in response to adenosine diphosphate (adp) or 5HT were similar to results obtained with PRP. When fibrinogen was substituted for plasma, ADP-induced aggregation occurred but was feeble. Without added plasma or fibrinogen, platelets were refractory to ADP and insensitive to the cyclic endoperoxide analogue U44619. When both ADP and U44619 were added simultaneously, in low concentrations, to washed platelets without added plasma or fibrinogen, aggregation occurred immediately. Washed platelets were not aggregated by adrenaline, which potentiated ADP-induced aggregation. Several biochemical measurements which are sensitive indicators of cellular damage were normal in washed platelets, including [14C]adenine uptake, adenylate energy charge, hypoxanthine formation and the response of adenylate cyclase to stimulation by PGE1 or PGD2. Platelet coagulant activities were not made available and heparin-neutralizing activity (HNA) was not spontaneously released by the washing procedure, but the washed platelets responded normally to appropriate agents by developing coagulant activities and releasing HNA. The ultrastructure of washed platelets was similar to those in control PRP. Inclusion of apyrase in the first albumin gradient had a beneficial effect on platelet morphology, aggregation and metabolism, but washing at 37degreesC compared with 25degreesC did not. Albumin density gradient separation is a useful method for isolating platelets for aggregation and metabolic studies.

Toward an "Intent" Model of Conflict Management Among Principal Parties

Abstract: The paper notes the relative neglect, within the conflict literature, of conflict management activities by the principal parties themselves. In part, this is asserted to reflect the legacy of behaviorism and experimental gaming. The authors lay a groundwork for a theory of conflict management activities among principal parties by examining the role of attributed intent within conflict episodes. A literature review indicates that attribution of other party's intent is a central activity in conflict episodes, and that these attributions play a crucial mediating role in shaping each party's reactions to the other's behavior-specifically mediating hostility and retaliation. The authors also present attributional data from executives which indicate that there are strong biases in the perception of intent-namely that individuals tend to see themselves as cooperative and reasonable, but attribute competitiveness and unreasonableness to the other party. Given their importance and ambiguity, attributions of intent...

Localization of 125I-labeled FSH in the testes of hypophy-sectomized rats by autoradiography at the light and electron microscope levels.

Abstract: Previous evidence has indicated that the testicular receptors for FSH reside on plasma membranes in seminiferous tubules, and that the Sertoli cell is a primary target of the hormone. Since the Sertoli cell is large and elaborately structured, it is important to know whether there is a regional distribution of receptors over its extensive surface. In the present study, the specific binding of 25I-labeled hFSH to seminiferous tubules of hypophysectomized rats was examined, utilizing autoradiography at both the light and electron microscope levels. Purified hFSH (LER-1575C) was iodinated to an average specific activity of 29 μCi/μg, and approximately 1 μg was administered intratesticularly in 40 day old rats which had been hypophysectomized 10 days earlier. In some cases, testosterone was administered after hypophysectomy in order to maintain spermatogenesis. Controls were of two types: 40 day old intact littermates in which endogenous FSH presumably occupied most of the receptors, and hypophysectomized rat...

Basolateral plasma membrane localization of ouabain-sensitive sodium transport sites in the secretory epithelium of the avian salt gland

Abstract: The distribution of Na+ pump sites (Na+-K+-ATPase) in the secretory epithelium of the avian salt gland was demonstrated by freeze-dry autoradiographic analysis of [(3)H] ouabain binding sites. Kinetic studies indicated that near saturation of tissue binding sites occurred when slices of salt glands from salt-stressed ducks were exposed to 2.2 μM ouabain (containing 5 μCi/ml [(3)H]ouabain) for 90 min. Washing with label-free Ringer's solution for 90 min extracted only 10% of the inhibitor, an amount which corresponded to ouabain present in the tissue spaces labeled by [(14)C]insulin. Increasing the KCl concentration of the incubation medium reduced the rate of ouabain binding but not the maximal amount bound. In contrast to the low level of ouabain binding to salt glands of ducks maintained on a freshwater regimen, exposure to a salt water diet led to a more than threefold increase in binding within 9-11 days. This increase paralleled the similar increment in Na+-K+-ATPase activity described previously. [(3)H]ouabain binding sites were localized autoradiographically to the folded basolateral plasma membrane of the principal secretory cells. The luminal surfaces of these cells were unlabeled. Mitotically active peripheral cells were also unlabeled. The cell-specific pattern of [(3)H]ouabain binding to principal secretory cells and the membrane-specific localization of binding sites to the nonluminal surfaces of these cells were identical to the distribution of Na+-K+-ATPase as reflected by the cytochemical localization of ouabain-sensitive and K+-dependent nitrophenyl phosphatase activity. The relationship between the nonluminal localization of Na+-K+-ATPase and the possible role of the enzyme n NaCl secretion is considered in the light of physiological data on electrolyte transport in salt glands and other secretory epithelia.

A comparison of cyclophosphamide, adriamycin, 5‐fluorouracil (CAF) and cyclophosphamide, methotrexate, 5‐fluorouracil, vincristine, prednisone (CMFVP) in patients with metastatic breast cancer. A southeastern cancer study group project

Abstract: In an ongoing prospective randomized study, 113 evaluable patients have received either a three-drug combination that included cyclophosphamide, Adriamycin and 5-fluorouracil (CAF) or a five-drug combination including cyclophosphamide, methotrexate, 5-fluorouracil, vincristine and prednisone (CMFVP) given intermittently 1 week out of 4. Responses (64%), median duration of response (32 weeks), and median duration of disease control (32 weeks) achieved with CAF were superior to those achieved with CMFVP (37%, 22 weeks, 17 weeks, respectively). Morbidity secondary to CAF was significant, with nausea and vomiting, malaise, total alopecia, and granulocytopenia being the main features. Cancer 40:625–632, 1977.

Endodontic perforations: their prognosis and treatment

Abstract: Various causes of perforations, the prognosis for the tooth, and treatment techniques are discussed. Perforation of a tooth resulting in the communication of the root canal with the periodontal structures occasionally occurs during endodontic treatment. They may be induced iatrogenically or by resorption or caries. Prognosis of the tooth depends on the location of the perforation, the duration that the perforation is open to contamination, feasibility of sealing the perforation, and accessibility of the main canal. The manner in which the problem may be resolved both surgically and nonsurgically is considered.

On some generalized farlie-gumbel-morgenstern distributions-II regression, correlation and further generalizations

Abstract: Regression and correlation properties of the generalized Farlie-Gumbel-Morgenstem distributions introduced in Johnson and Kotz (1975) are studied. Further generalizations of these distributions are considered.

Revised and extended scaling for coexisting densities of sf6

Abstract: The data of Weiner, Langley, and Ford on both the sum and difference of coexisting densities of S${\mathrm{F}}_{6}$ are found to be consistent, within a range of 2% in reduced temperature of ${T}_{c}$, with the series of terms (revised and extended scaling) predicted by renormalization group calculations. The hypothesis that the relatively small range of applicability of this series is due to a crossover to Van der Waals behavior is supported by further analysis.

Toward Multi-Dimensional Values in Teaching: The Example of Conflict Behaviors

Abstract: The article examines the role of values in business education and proposes a philosophy of education with respect to value positions. The author notes that due to increasing political and ethical issues being raised in business there has become a growing interest to include a value-oriented aspect in the business education curriculum. He examines how values play a role in areas such as conflict management and discusses some of the conflict-handling modes which include; competing, collaborating, compromising, avoiding and accommodating. He closes by discussing the need to develop teaching strategies that take into account differences in strengths and weaknesses between students in order for students to get the most out of their individual skills.

An Analysis of the Journey to Work for Women

Abstract: The basic argument of this paper is that the journey to work has a different meaning for women than for men. Unlike men, women's Home-role requirements are important predictors of the length of their journey to work. Data from the NLS survey of women aged thirty to forty-four are examined. The main findings are that women with demanding home roles have shorter journeys to work, and that, although black women have longer journeys to work than white women, this is a function of residence and not of differences in the relationship of the home role to the length of journey to work.

Topical chemotherapy and immunotherapy of mycosis fungoides: intermediate-term results.

Abstract: • A group of 220 patients with mycosis fungoides (MF) and other lymphomatous diseases was treated with sustained topical applications of dilute aqueous solutions of mechlorethamine hydrochloride for intervals ranging in excess of seven years. Response to treatment, immunologic responsiveness, and subsequent course and survival were inversely related to magnitude of disease at time of starting treatment. Relapses were common, and in most instances were related to failure of maintenance of topical therapy rather than to drug resistance. In selected patients topical therapy with an analog of mechlorethamine (nor-mechlorethamine) and with topical immunogenic agents provided additional improvement. ( Arch Dermatol 113:454-462, 1977)