Ambiguities in order-theoretic formulations of thermodynamics

Since the 1909 work of Carath\'eodory, formulations of thermodynamics have gained ground which highlight the role of the the binary relation of adiabatic accessibility between equilibrium states. A feature of Carath\'eodory's system is that the version therein of the second law contains an ambiguity about the nature of irreversible adiabatic processes, making it weaker than the traditional Kelvin-Planck statement of the law. This paper attempts first to clarify the nature of this ambiguity, by defining the arrow of time in thermodynamics by way of the Equilibrium Principle ("Minus First Law"). It then argues that the ambiguity reappears in the important 1999 axiomatisation due to Lieb and Yngvason.Comment: 13 pages, 1 figur

The Puzzle of Muslim Advantage in Child Survival in India

The socio-economic status of Indian Muslims is, on average, considerably lower than that of upper caste Hindus. Muslims have higher fertility and shorter birth spacing and are a minority group that, it has been argued, have poorer access to public goods. They nevertheless exhibit substantially higher child survival rates, and have done for decades. This paper documents and analyses this seeming puzzle. The religion gap in survival is much larger than the gender gap but, in contrast to the gender gap, it has not received much political or academic attention. A decomposition of the survival differential reveals that some compositional effects favour Muslims but that, overall, differences in characteristics between the communities and especially the Muslim deficit in parental education predict a Hindu advantage. Alternative outcomes and specifications support our finding of a Muslim fixed effect that favours survival. The results of this study contribute to a recent literature that debates the importance of socioeconomic status (SES) in determining health and survival. They augment a growing literature on the role of religion or culture as encapsulating important unobservable behaviours or endowments that influence health, indeed, enough to reverse the SES gradient that is commonly observed.religion, caste, gender, child survival, anthropometrics, Hindu, Muslim, India

Greedy randomized dispatching heuristics for the single machine scheduling problem with quadratic earliness and tardiness penalties

In this paper, we present greedy randomized dispatching heuristics for the single machine scheduling problem with quadratic earliness and tardiness costs, and no machine idle time. The several heuristic versions differ, on the one hand, on the strategies involved in the construction of the greedy randomized schedules. On the other hand, these versions also differ on whether they employ only a final improvement step, or perform a local search after each greedy randomized construction. The proposed heuristics were compared with existing procedures, as well as with optimum solutions for some instance sizes. The computational results show that the proposed procedures clearly outperform their underlying dispatching heuristic, and the best of these procedures provide results that are quite close to the optimum. The best of the proposed algorithms is the new recommended heuristic for large instances, as well as a suitable alternative to the best existing procedure for the larger of the middle size instances.scheduling, single machine, early/tardy, quadratic penalties, greedy randomized dispatching rules

Mathematics Curriculum Coaching and Elementary School Students’ Mathematics Achievement in a Northeast Tennessee School System

Educators and policymakers have demonstrated interest in finding ways to better equip mathematics teachers so they can help students achieve at a higher level. Academic coaching has been identified as an effective professional development activity for teachers. The purpose of this study was to investigate the difference between students’ achievement levels before and after a mathematics initiative in a Northeast Tennessee school district. In this study I analyzed grades 3 – 6 students’ Tennessee Comprehensive Assessment Program or TCAP scores in the year prior to the hiring of a mathematics coach and their respective scores 2 years after the placement of the mathematics coach. All statistical analyses were analyzed at a .05 level of significance. All null hypotheses under both research questions were analyzed with a pairsampled t-test using repeated-measures design. The results indicate significant difference in students’ TCAP scores prior to and after specialist. Scores after specialist were significantly higher than scores before specialists. The difference was present for students who attended Title I schools as well as for students who attended non-Title I schools. School administrators and school district leaders can benefit from such a study because it presents academic coaching as a viable means to equip teachers so they can help students increase their achievement in mathematics

Using Benchmarking Methodology to Evaluate the Effectiveness of In-Home Parent-Child Interaction Therapy (PCIT)

Benchmarking offers community practitioners more systematic judgments about research effectiveness when control groups are not feasible, while also providing a standard for program transportability from clinical to community settings. The purpose of the current study was to outline the necessary decisions, calculations, and strengths and limitations of applying benchmarking methodologies to a behavioral parent training (BPT) program, a field in which benchmarking remains relatively underutilized. The implementation of in-home Parent-Child Interaction Therapy (PCIT), an evidence-based practice shown to be successful in reducing child maltreatment and neglect, was evaluated as a case study of the application of benchmarking. Of those parents that completed in-home PCIT, a significant reduction was seen for pre-post ECBI scores. Six randomized controlled trials (RCTs) were established as benchmarks based on similarity in parent and child demographics as well as use of the ECBI as a primary measure. Effect sizes of each benchmark study were aggregated to create a single benchmark effect size for treatment and control groups, respectively. The effect size of the current study was found to be significantly superior to the control benchmark effect size but not significantly equivalent to the treatment benchmark effect size. Although the current study demonstrates the use of benchmarking in community research, the need for further guidelines is critical for researchers

Polarization squeezing of light by single passage through an atomic vapor

We have studied relative-intensity fluctuations for a variable set of orthogonal elliptic polarization components of a linearly polarized laser beam traversing a resonant $^{87}$Rb vapor cell. Significant polarization squeezing at the threshold level (-3dB) required for the implementation of several continuous variables quantum protocols was observed. The extreme simplicity of the setup, based on standard polarization components, makes it particularly convenient for quantum information applications.Comment: Revised version. Minor changes. four pages, three figure

Effects of Perceived Discrimination on the School Satisfaction of Brazilian High School Graduates

This paper analyzes the consequences of peer victimization for the satisfaction with schooling (“happiness”) of college-bound high school graduates in Brazil.  Several types of victimization are explored including discrimination due to race/ethnicity, socioeconomic status, gender, sexual orientation, religious affiliation, and disability. We compare the satisfaction with their schooling of students planning to head to college straight from high school and older students applying for college later in life (“nontraditional students”). We conclude that students who perceived that they had been discriminated against were more dissatisfied with their school experience than those who did not, ceteris paribus, and we relate level of dissatisfaction to type of discrimination. The older student evidence reveals that this dissatisfaction wanes with time and age, however. Our conclusions are based upon ordered logistic analyses of data for 2.4 million current high school seniors and 78.7 thousand older students drawn from the Exame Nacional do Ensino Médio questionnaire (ENEM)

LIMIT ANALYSIS APPROACH FOR THE SEISMIC VULNERABILITY REDUCTION OF MASONRY TOWERS THROUGH STRENGTHENING WITH TRADITIONAL AND INNOVATIVE MATERIALS

The paper investigates the possibility and the effectiveness of reducing the seismic vulnerability of masonry towers by means of composite materials and traditional steel bands. Masonry towers are very widespread in Italy, both as bell towers for churches and defense towers in medieval cities and castles. Masonry material, presenting low mechanical properties, is not suitable to withstand significant tensile and compression stresses induced by earthquake loading. The slenderness of these structures is another factor that can reduce the bearing capacity when significant stresses are present in specific structural parts. The seismic vulnerability of masonry towers is very high, as a consequence of both poor material properties in tension and high compression levels at the base of the structure. Moreover, Italy is characterized by a high potential risk to be stricken by moderate/high seismic events, as experienced in the last decades. In such a situation, the seismic upgrading of masonry towers could appear rather important. Seismic upgrading by introducing both traditional steel bars and composite materials as strips or rebars is analyzed in detail for different towers. Based on some a priori assumed failure modes (one proposed by Heyman), simplified models from a limit analysis approach are here discussed and used to define the most suitable retrofitting solution. The retrofitting possibilities consist of: a) horizontal hooping rings; b) vertical pre-stressed tie rods; c) vertical composite strips. A simplified straightforward relationship is found between the retrofitting requirements and seismic hazard. The procedure is applied for a wide range of geometrical properties and appears to be fast and reliable

Vamos para Rua! Taking to the Streets Protest in Brazil

The unprecedented protests that unfolded in June 2013 in Brazil, surprised even the most observant Brazilian scholars. A local conflict over the increase of public transportation fare took an unexpected turn and ignited a massive nationwide mobilization. These protests have perplexed many because Brazil was not experiencing the context of economic or political instabilities that are common to other countries around the world, where massive protests have emerged. Using data from the World Values Survey, we developed a general analysis highlighting individual factors that were significant in explaining protest participation among Brazilians to shed light on possible indicators that could have predicted the recent mobilizations. In particular, this work seeks to understand the extent to which a change from materialist to post-materialist values, as theorized by Inglehart (1971), could contribute towards explaining the recent protests in Brazil. Our findings demonstrate that post-materialist values are a significant explanatory force in determining political participation in Brazil