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Distinct Categories (distinct + category)
Selected AbstractsVariation in Vocal Performance in the Songs of a Wood-Warbler: Evidence for the Function of Distinct Singing ModesETHOLOGY, Issue 7 2004Martin D. Beebee Male North American wood-warblers (family Parulidae) subdivide their song repertoires into two different categories, or modes, of singing (first and second category songs). These two modes are thought to be specialized for interacting with females and males, although the data are inconclusive. I conducted an acoustic analysis of the song types used by yellow warblers (Dendroica petechia) for type I (first category) and type II (second category) singing to ask whether there are consistent structural differences between them which could provide insight into how they might function as separate signals. I found that type I songs are performed closer to the upper boundary of a song performance limit, measured in terms of the difficulty of production, compared with type II songs. By contrast, the performance of specific song types did not depend on whether they were used for type I singing vs. type II singing by different males. In addition, type I songs had a greater amplitude increase across the first two syllables compared with type II songs. There was no relationship between the performance of type I or type II songs and male condition. These results suggest that wood-warblers might subdivide their song repertoire into distinct categories to highlight the relative vocal performance of their songs. [source] Hydroelastic vibrations of flexible rectangular tanks partially filled with liquidINTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Issue 2 2007Ding Zhou Abstract In this paper, the three-dimensional vibratory characteristics of flexible rectangular tanks partially filled with liquid are studied. The surface waves of the liquid are taken into account in the analysis. Both the bulging modes of the tank-wall vibration and the sloshing modes of the liquid oscillation are investigated. The vibrating modes of the liquid,tank system are divided into four distinct categories: double symmetric modes (SS); antisymmetric,symmetric modes (AS); symmetric,antisymmetric modes (SA) and double antisymmetric modes (AA). Each of these categories is separately investigated. The velocity potential of the liquid is analytically deduced by using a combination of the superposition method and the method of separation of variables. According to the liquid,tank interface conditions and the orthogonality of trigonometric functions, the coefficients in the solution of liquid velocity potential are expressed in the integral forms including the tank,wall dynamic deflection. A set of reasonable static beam functions is constructed as the admissible functions of the tank-wall vibration. The eigenfrequency equation of the liquid,tank system is derived by using a combination of the Rayleigh,Ritz method and the Galerkin method. Convergence study demonstrates the high accuracy and small computational cost of the proposed approach. Finally, some numerical results are presented for the first time. Copyright © 2006 John Wiley & Sons, Ltd. [source] Motion picture performance: A review and research agendaINTERNATIONAL JOURNAL OF MANAGEMENT REVIEWS, Issue 3 2009Allègre L. Hadida This paper provides a comprehensive literature review of empirical studies of motion picture performance published from 1977 to 2006 inclusive in the following five disciplines of the social sciences: strategy, organization theory, marketing, cultural economics and sociology. It introduces a novel framework which organizes the various dimensions and explanatory factors of movie performance into five distinct categories and underscores their relationships. The paper, which uses this model as a roadmap for discussions of film success, serves two complementary purposes. First, it clarifies the current state of the literature, stresses core contributions and exposes limitations in existing research by emphasizing hitherto neglected independent explanatory factors, dependent dimensions and correlations between them. Second, it introduces five conceptual, methodological and empirical suggestions for further cinema performance research aimed at addressing these limitations and, accordingly, at providing better accounts of motion picture performance in view of the fast-changing conditions of cinema production, marketing and consumption. [source] Identifying the Activities Affected by Chronic Nonmalignant Pain in Older Veterans Receiving Primary CareJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 4 2005Bao D. Duong MD Objectives: To identify the specific types of activities affected by chronic pain in older persons and the extent to which older individuals modify, perform less frequently, or terminate activities because of pain. Design: Cross-sectional survey. Setting: Primary care practice at a Veterans Affairs Medical Center in New England. Participants: Two hundred forty-four patients (aged 65,90) with chronic nonmalignant pain. Measurements: Open-ended questions were used to identify the activities affected by pain; participants' responses were subsequently organized into distinct categories (e.g., climbing stairs under higher-order physical activities and going out to dinner under social/recreational activities). Participants were also asked to indicate whether they had modified, performed less frequently, or terminated these activities because of pain. Results: Participants had a mean age±standard deviation of 75.4±5.2, were mostly male (84%), and had an average pain intensity score of 6.2±1.9 on a 0- to 10-scale. Two hundred three participants (83%) reported that pain affected one or more higher-order physical activities, and the corresponding percentages for the categories of social/recreational activities, instrumental activities of daily living, and basic activities of daily living were 74%, 57%, and 3%, respectively. The proportions of participants who modified, performed less frequently, or terminated one or more activities because of pain were 71%, 69%, and 22%, respectively. Conclusion: Assessing the effects of chronic pain across multiple functional domains is indicated in older primary care patients, particularly higher-order physical and social/recreational activities. Inquiring about whether the activities are modified, reduced, or terminated may also help to expand understanding of pain-related disability in older persons. [source] Caregiver Understanding of Adolescent Development in Residential TreatmentJOURNAL OF CHILD AND ADOLESCENT PSYCHIATRIC NURSING, Issue 4 2002Susan Kools PhD PROBLEM Caretaker knowledge and understanding of adolescent development and its application to clinical practice with severely emotionally disturbed adolescents in residential treatment. METHODS Twenty child-care workers and registered nurses participated in semistructured interviews analyzed using dimensional analysis, a grounded theory method. FINDINGS Three distinct categories of caregivers were identified based on level of expertise and engagement in developmentally appropriate treatment practices: inexperienced, party-liners, and transcenders. Developmental issues identified included lack of resident preparation for puberty and staff discomfort with adolescent sexuality. CONCLUSIONS Caregiver, institutional, and social barriers to developmentally sensitive practice were identified. Practice recommendations include direct preparation of children and adolescents in residential treatment for pubertal changes and sexual development, and carefkl discernment of age-appropriate and psycho-pathological adolescent behaviors. [source] Young adults' ideas of cure prior to psychoanalytic psychotherapyJOURNAL OF CLINICAL PSYCHOLOGY, Issue 3 2007Björn Philips The study aims to explore systematically the ideas of cure among young adults prior to psychoanalytic psychotherapy. Forty-six individuals aged 18 to 25 years who applied for psychotherapy underwent the Private Theories Interview (PTI). Twenty distinct categories of ideas of cure were identified. Based on these categories, a theoretical model was constructed with the dimensions, Approaching,Distancing and Doing,Receiving. Individuals were classified into types using "ideal type analysis." Seven ideal types were formed: Processing and Understanding, Mastering Through Own Will and Action, Talking, Discordant Ideas, Incoherent Ideas, Getting It Out, and Avoiding or Placing the Solution onto Others. New hypotheses emerged concerning ideas of cure as an important factor for psychotherapy matching, thus potentially predicting premature termination, alliance, and outcome. © 2007 Wiley Periodicals, Inc. J Clin Psychol 63: 213,232, 2007. [source] Toward a Theory of Self-Reconciliation Following Mistakes in Nursing PracticeJOURNAL OF NURSING SCHOLARSHIP, Issue 2 2007Nancy J. Crigger Purpose: To explore nurses' responses to making mistakes in hospital-based practice in the US. Methods: A grounded theory approach was used to explore the process that occurs after nurses perceive that they have made mistakes in practice. Theoretical sampling was used and data were collected until saturation occurred. Ten participants, who were registered nurses, described 17 personal mistakes. The mistakes they described occurred in hospitals. All participants were practicing nursing either in hospitals or in other work settings. Findings: A process of "Self-Reconciliation After Making Mistakes in Hospital Practice" was identified, with four distinct categories: reality hitting, weighing in, acting, and reconciling. The core category was reconciliation of the self, personally and professionally. Conclusions: This research was a first step toward the development of a theory of mistake making in nursing practice. This response to making mistakes is consistent with previous research and is related to cognitive dissonance theory. The responses to mistakes varied from less healthy responses of blaming and silence to healthier responses that included disclosure, apologizing, and making amends. Further research to develop the theory and to determine helpful interventions is suggested. [source] Predicting P-glycoprotein substrates by a quantitative structure,activity relationship modelJOURNAL OF PHARMACEUTICAL SCIENCES, Issue 4 2004Vijay K. Gombar Abstract A quantitative structure,activity relationship (QSAR) model has been developed to predict whether a given compound is a P-glycoprotein (Pgp) substrate or not. The training set consisted of 95 compounds classified as substrates or non-substrates based on the results from in vitro monolayer efflux assays. The two-group linear discriminant model uses 27 statistically significant, information-rich structure quantifiers to compute the probability of a given structure to be a Pgp substrate. Analysis of the descriptors revealed that the ability to partition into membranes, molecular bulk, and the counts and electrotopological values of certain isolated and bonded hydrides are important structural attributes of substrates. The model fits the data with sensitivity of 100% and specificity of 90.6% in the jackknifed cross-validation test. A prediction accuracy of 86.2% was obtained on a test set of 58 compounds. Examination of the eight "mispredicted" compounds revealed two distinct categories. Five mispredictions were explained by experimental limitations of the efflux assay; these compounds had high permeability and/or were inhibitors of calcein-AM transport. Three mispredictions were due to limitations of the chemical space covered by the current model. The Pgp QSAR model provides an in silico screen to aid in compound selection and in vitro efflux assay prioritization. © 2004 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 93: 957,968, 2004 [source] Using clustering techniques to detect usage patterns in a Web-based information systemJOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY, Issue 11 2001Hui-Min Chen Different users of a Web-based information system will have different goals and different ways of performing their work. This article explores the possibility that we can automatically detect usage patterns without demographic information about the individuals. First, a set of 47 variables was defined that can be used to characterize a user session. The values of these variables were computed for approximately 257,000 sessions. Second, principal component analysis was employed to reduce the dimensions of the original data set. Third, a two-stage, hybrid clustering method was proposed to categorize sessions into groups. Finally, an external criteria-based test of cluster validity was performed to verify the validity of the resulting usage groups (clusters). The proposed methodology was demonstrated and tested for validity using two independent samples of user sessions drawn from the transaction logs of the University of California's MELVYL® on-line library catalog system (www.melvyl.ucop.edu). The results indicate that there were six distinct categories of use in the MELVYL system: knowledgeable and sophisticated use, unsophisticated use, highly interactive use with good search performance, known-item searching, help-intensive searching, and relatively unsuccessful use. Their characteristics were interpreted and compared qualitatively. The analysis shows that each group had distinct patterns of use of the system, which justifies the methodology employed in this study. [source] "Jurisdictional Politics" in the Occupied West Bank: Territory, Community, and Economic Dependency in the Formation of Legal SubjectsLAW & SOCIAL INQUIRY, Issue 1 2006Tobias Kelly This article examines the distribution of legal rights in the Israeli occupied West Bank. It argues that legal rights are distributed through a "jurisdictional politics" that tries to stabilize the contingent relationship between political community, territory, and legal subjects. In particular, this jurisdictional politics seeks to delimit the contradictory boundaries of the Israeli state by creating distinct categories of person out of the populations that live and work in the region. These issues are addressed by examining a dispute concerning the jurisdiction of Israeli law over Palestinian workers in Israeli settlements in the West Bank. The article ends by arguing that in the context of multiple movements of people, capital, and military force, attention must be paid to the often contradictory ways in which jurisdictional regimes seek to produce particular types of citizens and subjects. [source] Fight or flight: antipredator strategies of baleen whalesMAMMAL REVIEW, Issue 1 2008JOHN K. B. FORD ABSTRACT 1The significance of killer whale Orcinus orca predation on baleen whales (Mysticeti) has been a topic of considerable discussion and debate in recent years. Discourse has been constrained by poor understanding of predator-prey dynamics, including the relative vulnerability of different mysticete species and age classes to killer whales and how these prey animals avoid predation. Here we provide an overview and analysis of predatory interactions between killer whales and mysticetes, with an emphasis on patterns of antipredator responses. 2Responses of baleen whales to predatory advances and attacks by killer whales appear to fall into two distinct categories, which we term the fight and flight strategies. The fight strategy consists of active physical defence, including self-defence by single individuals, defence of calves by their mothers and coordinated defence by groups of whales. It is documented for five mysticetes: southern right whale Eubalaena australis, North Atlantic right whale Eubalaena glacialis, bowhead whale Balaena mysticetus, humpback whale Megaptera novaeangliae and grey whale Eschrichtius robustus. The flight strategy consists of rapid (20,40 km/h) directional swimming away from killer whales and, if overtaken and attacked, individuals do little to defend themselves. This strategy is documented for six species in the genus Balaenoptera. 3Many aspects of the life history, behaviour and morphology of mysticetes are consistent with their antipredator strategy, and we propose that evolution of these traits has been shaped by selection for reduced predation. Fight species tend to have robust body shapes and are slow but relatively manoeuvrable swimmers. They often calve or migrate in coastal areas where proximity to shallow water provides refuge and an advantage in defence. Most fight species have either callosities (rough and hardened patches of skin) or encrustations of barnacles on their bodies, which may serve (either primarily or secondarily) as weapons or armour for defence. Flight species have streamlined body shapes for high-speed swimming and they can sustain speeds necessary to outrun pursuing killer whales (>15,20 km/h). These species tend to favour pelagic habitats and calving grounds where prolonged escape sprints from killer whales are possible. 4The rarity of observed successful attacks by killer whales on baleen whales, especially adults, may be an indication of the effectiveness of these antipredator strategies. Baleen whales likely offer low profitability to killer whales, relative to some other marine mammal prey. High-speed pursuit of flight species has a high energetic cost and a low probability of success while attacks on fight species can involve prolonged handling times and a risk of serious injury. [source] Non-coding RNAs: Meet thy mastersBIOESSAYS, Issue 7 2010Fabrício F. Costa Abstract New DNA sequencing technologies have provided novel insights into eukaryotic genomes, epigenomes, and the transcriptome, including the identification of new non-coding RNA (ncRNA) classes such as promoter-associated RNAs and long RNAs. Moreover, it is now clear that up to 90% of eukaryotic genomes are transcribed, generating an extraordinary range of RNAs with no coding capacity. Taken together, these new discoveries are modifying the status quo in genomic science by demonstrating that the eukaryotic gene pool is divided into two distinct categories of transcripts: protein-coding and non-coding. The function of the majority of ncRNAs produced by the transcriptome is largely unknown; however, it is probable that many are associated with epigenetic mechanisms. The purpose of this review is to describe the most recent discoveries in the ncRNA field that implicate these molecules as key players in the epigenome. [source] Microfluidic-Assisted Synthesis of Polymer ParticlesCHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 8 2008A. Serra Abstract Microfluidic devices have recently emerged as promising tools for the synthesis of polymer particles. Over conventional processes, microfluidic-assisted processes allow the production of polymer particles with an improved control over their sizes, size distributions, morphologies, and compositions. In this paper, the most common microfluidic devices are reviewed. Both projection photolithography and emulsification processes are reported for the continuous flow synthesis of polymer particles from a stream of polymerizable liquids. For the latter process, two distinct categories of microfluidic devices have been identified: microchannel-based and capillary-based microsystems. For each category, the existing geometries are described and the different emulsification methods including the co-flowing, cross-flowing, or flow-focusing of the continuous and dispersed phases are commented upon. Finally, for each microsystem the various polymer particles achieved in such devices including, but not restricted to, janus, core,shell, or porous particles and capsules are reported. [source] Role of interleukin-17F in chronic inflammatory and allergic lung diseaseCLINICAL & EXPERIMENTAL ALLERGY, Issue 9 2006N. Hizawa Summary IL-17 family members belong to a distinct category of cytokines that coordinate local tissue inflammation by inducing the release of pro-inflammatory and neutrophil-mobilizing cytokines. The importance of the IL-17 family in inflammatory and autoimmune disease is becoming increasingly apparent. IL-17F is a recently discovered member of the IL-17 family that has a number of biological activities through induction of various cytokines, chemokines, and mediators. IL-17A, the founding member of the IL-17 family, and IL-17F are produced by several inflammatory cells, including activated T cells, in response to infectious and antigenic stimuli. Overexpression of IL-17A or IL-17F in the lungs results in induction of CXC chemokines and neutrophil recruitment. In a case,control study of 1125 unrelated Japanese subjects, a His161 to Arg161 (H161R) substitution in the third exon of the IL17F gene was shown to be associated with asthma and chronic obstructive pulmonary disease (COPD). Functionally, this variant failed to induce cytokines and chemokines, and interestingly, was able to antagonize the activity of wild-type IL-17F. These results provide an experimental basis for the observed genetic association with chronic inflammatory lung diseases, and also suggest the potential therapeutic utility of this antagonistic variant of IL-17F. Given that asthma and COPD are complex diseases involving a number of genetic and environmental factors, the genetic impact of IL-17F H161R with regard to the development of chronic airway inflammation likely varies among individuals with different genetic backgrounds and environmental exposures. [source] | ||||||||||||||||