Growing through copying: The negative consequences of innovation on franchise network growth     

Gabriel Szulanski  Robert J. Jensen 《Research Policy》2008,37(10):1732-1741

We explore how more exactly copying a blueprint for establishing a franchise network in a new country influences franchising network growth. We test opposing hypotheses using panel data involving the transfer of franchising knowledge to 23 different countries, measuring the degree to which master licensees ‘copy exactly’ knowledge concerning how to grow a network in their country and the effect that their approach has on subsequent network growth. We conclude that a strategy of copying more exactly seems to enhance growth and that the benefits of more exactly replicating knowledge in the 1st year of a local network’s existence persist for several years. Thus, innovation, in this specific context, seems to hinder firm growth.  相似文献   

Does a resistance exercise session with continuous or intermittent blood flow restriction promote muscle damage and increase oxidative stress?     

Gabriel R. Neto  Jefferson S. Novaes  Verônica P. Salerno  Michel M. Gonçalves  Gilmário R. Batista  Maria S. Cirilo-Sousa 《Journal of sports sciences》2018,36(1):104-110

The aim of this study was to compare the effect of low-load resistance exercise (LLRE) with continuous and intermittent blood flow restriction (BFR) on the creatine kinase (CK), lactate dehydrogenase (LDH), protein carbonyl (PC), thiobarbituric acid-reactive substance (TBARS) and uric acid (UA) levels in military men. The study included 10 recreationally trained men aged 19 ± 0.82 years who underwent the following experimental protocols in random order on separate days (72–96 h): 4 LLRE sessions at a 20% 1RM (one-repetition maximum [1RM]) with continuous BFR (LLRE + CBFR); 4 LLRE sessions at 20% 1RM with intermittent BFR (LLRE + IBFR) and 4 high-intensity resistance exercise (HIRE) sessions at 80% 1RM. The CK and LDH (markers of muscle damage) levels were measured before exercise (BE), 24 h post-exercise and 48 h post-exercise, and the PC, TBARS and UA (markers of oxidative stress) levels were measured BE and immediately after each exercise session. There was a significant increase in CK in the HIRE 24 post-exercise samples compared with the LLRE + CBFR and LLRE + IBFR (P = 0.035, P = 0.036, respectively), as well as between HIRE 48 post-exercise and LLRE + CBFR (P = 0.049). Additionally, there was a significant increase in CK in the LLRE + CBFR samples BE and immediately after each exercise (Δ = 21.9%) and in the HIRE samples BE and immediately after each exercise, BE and 24 post-exercise, and BE and 48 post-exercise (Δ values of 35%, 177.6%, and 177.6%, respectively). However, there were no significant changes in LDH, PC, TBARS, and UA between the protocols (P > 0.05). Therefore, a physical exercise session with continuous or intermittent BFR did not promote muscle damage; moreover, neither protocol seemed to affect the oxidative stress markers.  相似文献   

Application of the LaGrange polynomial in skeletal muscle fatigue analysis     

Gabriel D  Proctor D  Engle D  Nair S  Vittone J  An KN 《Research quarterly for exercise and sport》2002,73(2):168-174

The percentage of decrement in torque and the number of serial contractions are mutually exclusive methodological controls in the study of muscular fatigue. This paper examines the feasibility of using the LaGrange polynomial in the analysis of voluntary muscular fatigue patterns. Twenty-one men (ages 20-60 years) reported to the orthopedic biomechanics laboratory on 2 days separated by 4 months. During both sessions, participants completed three maximal isokinetic (180 deg x s(-1)) contractions of the knee extensors to serve as baseline, before starting the fatigue protocol. The fatigue protocol consisted of serial contractions until a 50% strength decrement was reached. The LaGrange polynomial was first used to interpolate the individual fatigue pattern for each participant into 15 data points (trials). Data analysis was then conducted on these 15 data points. Intraclass correlation analysis of variance showed that the reliability of baseline torque was very good (.93). Baseline torque, the average of three trials, exhibited a 5.4 Nm (6%) increase from the first to second test session (p < .05). The mean level of torque, average of the 15-point fatigue pattern, also increased 7.5 Nm (15%) on the second test session (p < .05). The classic torque deficit for the first trial of a fatigue series was preserved by the interpolation method. Serial contractions resulted in an average decrease in torque of 29.5 Nm (50%) from the first to last trial (p <.05). The interpolation method also retained the linear and quadratic trend components commonly observed for isometric and isokinetic fatigue patterns. The two trend components accounted for 94.7% of the total trial variance. It was concluded that the LaGrange polynomial used to interpolate fatigue patterns to fewer data points was successful.  相似文献   

A secure base in adolescence: markers of attachment security in the mother-adolescent relationship     

Allen JP  McElhaney KB  Land DJ  Kuperminc GP  Moore CW  O'Beirne-Kelly H  Kilmer SL 《Child development》2003,74(1):292-307

This study sought to identify ways in which adolescent attachment security, as assessed via the Adult Attachment Interview, is manifest in qualities of the secure base provided by the mother-adolescent relationship. Assessments included data coded from mother-adolescent interactions, test-based data, and adolescent self-reports obtained from an ethnically and socioeconomically diverse sample of moderately at-risk 9th and 10th graders. This study found several robust markers of adolescent attachment security in the mother-adolescent relationship. Each of these markers was found to contribute unique variance to explaining adolescent security, and in combination, they accounted for as much as 40% of the raw variance in adolescent security. These findings suggest that security is closely connected to the workings of the mother-adolescent relationship via a secure-base phenomenon, in which the teen can explore independence in thought and speech from the secure base of a maternal relationship characterized by maternal attunement to the adolescent and maternal supportiveness.  相似文献   

The quality improvement management approach as implemented in a middle school     

David L. Bayless  Gabriel A. Massaro  Elizabeth Bailey  David Coley  Royce Holladay  Dana McDonald 《Journal of Personnel Evaluation in Education》1992,6(2):191-209

  相似文献   

To sustain life 'schools' concepts of adult work     

Gabriel Chanan 《Higher Education Quarterly》1976,31(1):37-46

  相似文献   

Education and Racism: some recent contributions [1]     

John Gabriel 《British Journal of Sociology of Education》1986,7(3):341-348

  相似文献   

Official and popular culture in the schooling process     

Narciso de Gabriel 《Paedagogica Historica: International Journal of the History of Education》2014,50(4):514-532

This article analyses the schooling process in rural areas of Galicia (Spain) from the mid-nineteenth to the mid-twentieth century, considering educational initiatives promoted by both the state and the rural population. The former, which were governed by the official school culture, were driven by a moralistic approach; the latter, within the framework of popular school culture, were essentially aimed at literacy. The confrontation that arose between the two initiatives was finally resolved in favour of the official school. Our main goal here is to analyse how popular schools (ferrado schools) were perceived by official culture (school administrators and education experts) as well as by those who were directly involved as protagonists, i.e. the schoolteachers who ran these schools (escolantes) and their pupils.  相似文献   

Mechanical properties of the triceps surae: Differences between football and non-football players     

Aurélio Faria  Ronaldo Gabriel  João Abrantes  Paola Wood  Helena Moreira 《Journal of sports sciences》2013,31(14):1559-1567

Abstract

We investigated the mechanical properties of the triceps surae between professional, junior, and non-football players. Fifty-nine men participated in this study. The mechanical properties of the right legs’ triceps surae were measured in vivo using a free oscillation technique; no significant differences existed between the groups. The mean results for musculo-articular stiffness, damping coefficient, and damping ratio were as follows: professional football players (21523 N· m^?1, 330.8 N · s · m^?1, and 0.201); junior football players (21063 N · m^?1, 274.4 N · s · m^?1, and 0.173); and non-players (19457 N · m^?1, 281.5 N · s · m^?1, and 0.184). When analysed according to position, the results were as follows: defender (21447 N · m^?1, 308.6 N · s · m^?1, and 0.189); midfielder (20762 N · m^?1, 250.7 N · s · m^?1, and 0.157); winger (21322 N · m^?1, 335.1 N · s · m^?1, and 0.212); forward (22085 N · m^?1, 416.2 N · s · m^?1, and 0.254); and non-players (19457 N · m^?1, 281.5 N · s · m^?1, and 0.184).

Thus, football training, football games, and the position played had no effect on triceps surae mechanical properties. These results may be attributed to opposing adaptations between different types of training that are usually implemented in football. Alternatively, the minimum strain amplitude and/or frequency threshold of the triceps surae required to trigger adaptations of mechanical properties might not be achieved by football players with football training and matches.  相似文献   

Effects of discovery and expository instructional methods on the attitude of students to biology     

Gabriel Adeniyi Ajewole 《科学教学研究杂志》1991,28(5):401-409

The effects of discovery and expository instructional methods on the attitude of students to biology was investigated. The sample consisted of 240 Form IV biology students randomly drawn from six selected secondary schools in the Oyo state of Nigeria. They were assigned into two groups—experimental and control. The experimental group was exposed to the discovery method, and the control group was taught using the expository method. The science class of Form IV in each of the six schools was selected intact for the study. A nonrandomized pretest-posttest control group design was employed. The major instrument was the 40–item Scientific Attitude Questionnaire (SAQ). It is a Likert-type questionnaire using five scales. Two hypotheses were tested. Analyses of the results showed that the experimental group evinced a significantly more favorable attitude to biology than the control group (t = 8.87, p < 0.01). It was also found that the high, average-, and low-ability groups in the experimental class evinced a more favorable attitude to biology than their counterparts in the control class. However, there was no significant difference in the attitude of male and female students exposed to the discovery and expository methods (F1,227 = 0.07, p > 0.999). The article concludes with a recommendation that science learning using the discovery method may enable the learner to evince more a favorable attitude toward problem recognition and problem solving than when learning is done by the expository method.  相似文献