bluuebunny/crossref_metadata_2025 huggingface dataset:
Continuity and Change: Fifty Years of the Journal/Revue
Authors: White Graham
Published: April 2017

This article surveys the first five decades of the Journal/Revue, with particular emphasis on patterns of change and continuity. The article presents a quantitative analysis of the articles published in the Journal/Revue, looking at, among other things, the balance of articles published in English and in French, the proportion of articles authored by women, the location and institutional affiliation of authors and the subject matter of published articles. Significant continuities emerge from the data, such as the predominance of Canadian-based authors writing on aspects of Canadian politics and the dominance of authors from large research-intensive universities. Yet change is also evident, for example in the number of women publishing in the Journal/Revue and in the emergence of articles in subfields not found in the Journal/Revue’s earlier days, most notably Aboriginal politics, gender and politics, and race and ethnicity.
La nation entre émancipation et reconnaissance : un état des lieux
Authors: Melançon Jérôme
Published: April 2017

Depuis 1995, la question de la nation en science politique a été ramenée à celle de la reconnaissance et de l’égalité des nations. La période contemporaine se distingue par cette impulsion dominante de la période des années 1960 et 1990, alors que les études se tournaient vers l’émancipation et la liberté de la nation. Une transition paradigmatique a eu lieu par le biais de trois genres d’études qui feront l'objet de cette recension. La position la plus discutée propose une synthèse du fédéralisme et du nationalisme d’émancipation autour de l'idée du fédéralisme multinational, qui met de l'avant l'impératif d’égalité. Une seconde position cherche à renouveler la tradition fédéraliste ou nationaliste de l'intérieur, afin de répondre aux défis politiques et aux innovations conceptuelles du moment. Enfin, une troisième position, souvent mais non exclusivement d'inspiration postmoderne et postcoloniale, refuse la matrice collectiviste qui sous-tend et le fédéralisme et le nationalisme pour se tourner vers l'expérience personnelle et interpersonnelle de la politique, parfois même pour la repenser à l'encontre de la nation et des ratés de la reconnaissance.
Taking the Field: 50 Years of Indigenous Politics in theCJPS
Authors: Ladner Kiera L.
Published: April 2017

This article reviews the place of Indigenous politics in the last 50 years of Canadian political science. Focusing on theCJPS, it looks at broad themes and clusters in the literature over time, while also trying to explain how the roots of the discipline continue to impact the development of political science in Canada and thusCJPS. I argue that while at least 43 articles have dealt with Indigenous politics (solely or as a significant focus) and at least 18 have had some significant discussion thereof, there nonetheless remains a disconnect between Indigenous politics and the discipline. This disconnect exists because of the methodological and epistemological foundations of the discipline which have resulted in a focus limited to the Westphalian state. While the disconnect between Indigenous politics and the discipline has waned considerably (43 of 61 articles have been published since 2000) as there has been an awakening of sorts, a disconnect nevertheless still exists.
Les cinquante ans de la Revue canadienne de science politique : Le bilinguisme en déclin?
Authors: Godbout Jean-François
Published: April 2017

L'équipe éditoriale de la Revue canadienne de science politique/Canadian Journal of Political Science (ci-après, la Revue) vous propose pour son cinquantième anniversaire trois textes publiés en français qui jettent un regard critique sur son passé et son avenir et qui retracent aussi, plus généralement, les enjeux inhérents à la production et à la diffusion de travaux en science politique dans la langue française. Nous vous proposons également trois essais critiques qui portent sur différents thèmes de recherche abordés dans les pages de la Revue depuis sa création en 1968.
ALL THE WORLD'S OFFSTAGE: METAPHYSICAL AND METAFICTIONAL ASPECTS IN SENECA'SHERCVLES FVRENS
Authors: Von Glinski Marie Louise
Published: April 2017

In his essay on Seneca, T.S. Eliot used theHercules Furens(=HF) as his example to illustrate ‘this curious freak of non-theatrical drama’. Even though Senecan scholarship has by and large moved away from his indictment, the sense that the attention seems to be directed away from the stage points to the play's unique dramaturgy. The surest indicator of this reverse orientation is the conspicuous absence of Hercules himself for much of the play. Hercules is (or wishes to be) permanently ‘elsewhere’. His entrance is delayed for a long time; once home, he rushes offstage after a few lines to kill Lycus. He returns onstage only to be attacked by madness, and is drawn inside the palace again to kill his wife and sons. When his madness abates, he falls asleep onstage; on waking, he longs for a place beyond the known world (and underworld) and finally exits into exile. This article proposes a closer examination of the semiotics of space, especially the symbolic value of the offstage. Seneca is constantly drawing attention to the pull towards the stage perimeter and the unseen offstage, characterizing the cosmic nature of Hercules’ conflict with Juno and questioning the hero's place in the world as the son of an immortal father.
CHALLENGES AND PROSPECTS OF WHEAT PRODUCTION IN BHUTAN: A REVIEW
Authors: TSHEWANG SANGAY , PARK ROBERT F. , CHAUHAN BHAGIRATH S. , JOSHI ARUN K.
Published: April 2017

Bhutan is a small country in the Himalayan mountains where subsistence agriculture is practiced due to small land holdings and undulating mountainous terrains. Due to diverse altitudinal and agro-ecological environments, many food crops are cultivated. Wheat is currently a secondary cereal, grown over an area of 1,964 ha with a total production of 3,465 Mg. While there are enormous opportunities to increase wheat production in Bhutan, it is challenged by numerous biotic and socio-economic factors such as labour shortage and low economic return. Among the biotic constraints, stripe rust and leaf rust are the most important diseases. Stem rust has not yet been reported. Poor crop nutrition, both through low soil fertility and inadequate external supply, also results in low productivity. In addition, better remunerative crops and affordable-imported products discourage wheat production. However, the availability and accessibility to higher yielding disease-resistant varieties, fertilization (both organic and inorganic), appropriate seed rate, optimum planting time, mechanization, rotation with legumes and expansion of wheat area are some measures that will play a crucial role in managing sustainable wheat production in Bhutan. In this paper, we provide a brief overview of the current scenario of wheat production, discuss the constraints and provide strategic guidance to improve wheat production in Bhutan.
JAPANESE APPROACHES TO EXTRATERRITORIALITY IN COMPETITION LAW
Authors: Martyniszyn Marek
Published: April 2017

Extraterritorial application of domestic competition law is an important feature of the current regulatory framework governing anticompetitive conduct. Japan was initially hesitant to apply its Antimonopoly Act in such a manner. However, over the last two decades there has been a significant shift in its approach. Japan has gradually embraced extraterritoriality and the Japan Fair Trade Commission has actively enforced competition law in a purely offshore context. This article investigates this evolution and considered the most recent and controversial cases in which Japan has applied its laws in a distinctive fashion.
Fractions of soil boron: a review
Authors: PADBHUSHAN R. , KUMAR D.
Published: April 2017

Knowledge of different fractions and availability of boron (B) is essential while studying the response of crops to B. Fractionation provides information about the chemistry of B and quantifies its bioavailability. Such information is potentially valuable for predicting bioavailability, B leaching, dynamics, transformation between chemical forms in soils and environmental impacts. Total B (T-B) is quantified into five fractions: readily soluble (Rs-B), specifically adsorbed (Spa-B), oxide bound (Ox-B), organically bound (Org-B) and residual B (Res-B). Of these, Rs-B is the fraction present in soil solution and adsorbed weakly by soil particles, and is most readily available for plant uptake. It accounts for 1–2% of T-B. The second most plant available form is Spa-B; it may be adsorbed onto clay surfaces or associated with organic matter (OM) in soil. The remaining fractions, Ox-B, Org-B and Res-B, are unavailable for plant uptake. The major portion (generally 87·4–99·7%) of T-B is composed of Res-B. Overall, the relative proportion of B in various fractions is in the order of Res B > Org-B > Spa-B > Rs-B > Ox-B. Several factors such as soil pH, soil OM, clay minerals, iron and aluminium oxides and calcium carbonate content may change the relative proportion of B in various fractions and the transformations among different soil B fractions. Some of the B fractions are correlated with others and exhibit responses in terms of plant growth. Non-specifically adsorbed (Nsa-B) and Spa-B are positively and significantly correlated to some sub-fractions of Ox-B, such as B occluded in manganese oxyhydroxides (Moh-B). The most readily available forms of B for plants are Nsa-B, Spa-B and Moh-B.
Pork-Barrel Politics and Electoral Reform: Explaining the Curious Differences in the Experiences of Thailand and Japan
Authors: Christensen Ray , Selway Joel Sawat
Published: April 2017

A comparison of recent Thai and Japanese politics presents a puzzle. Both nations undertook similar electoral reforms at about the same time, but the results have been dramatically different. Thai leaders are party-oriented and have shifted away from the pork-barrel politics of the past. Japanese leaders and members of parliament remain candidate-oriented and continue Japan's pork-barrel policies. We explain these divergent outcomes by analyzing the different causes of and politics surrounding the electoral reform efforts in both countries. Our findings join with the growing literature that questions the one-way causal effects that are usually purported to flow from institutional changes. Rather, we argue that new institutions, such as new election systems, can be as much a result of political changes as a cause of those same changes.
Reviewing biodiversity and epidemiological aspects of anisakid nematodes from the North-east Atlantic Ocean
Authors: Mattiucci S. , Cipriani P. , Paoletti M. , Levsen A. , Nascetti G.
Published: April 2017

This review provides an inventory of the biodiversity of the anisakid species identified so far from fish and marine mammals of the NE Atlantic Ocean. The paper reviews and discusses various taxonomical and epidemiological aspects related to biodiversity assessment, with emphasis on: (1) taxa recognized as ‘biological species’ based on molecular/genetic markers; (2) current molecular/genetic approaches to identify the species at different developmental stages; (3) ecological data related to the actual geographical distribution and definitive host preferences of the species; (4) their distribution in various, commercially important fish species in northern European waters; (5) their possible occurrence in farmed fish; and, finally, (6) an update of their zoonotic potential as causative agents of anisakidosis in humans.
Psychosocial interventions for children and adolescents after man-made and natural disasters: a meta-analysis and systematic review
Authors: Brown R. C. , Witt A. , Fegert J. M. , Keller F. , Rassenhofer M. , Plener P. L.
Published: April 2017

Children and adolescents are a vulnerable group to develop post-traumatic stress symptoms after natural or man-made disasters. In the light of increasing numbers of refugees under the age of 18 years worldwide, there is a significant need for effective treatments. This meta-analytic review investigates specific psychosocial treatments for children and adolescents after man-made and natural disasters. In a systematic literature search using MEDLINE, EMBASE and PsycINFO, as well as hand-searching existing reviews and contacting professional associations, 36 studies were identified. Random- and mixed-effects models were applied to test for average effect sizes and moderating variables. Overall, treatments showed high effect sizes in pre–post comparisons (Hedges' g = 1.34) and medium effect sizes as compared with control conditions (Hedges' g = 0.43). Treatments investigated by at least two studies were cognitive–behavioural therapy (CBT), eye movement desensitization and reprocessing (EMDR), narrative exposure therapy for children (KIDNET) and classroom-based interventions, which showed similar effect sizes. However, studies were very heterogenic with regard to their outcomes. Effects were moderated by type of profession (higher level of training leading to higher effect sizes). A number of effective psychosocial treatments for child and adolescent survivors of disasters exist. CBT, EMDR, KIDNET and classroom-based interventions can be equally recommended. Although disasters require immediate reactions and improvisation, future studies with larger sample sizes and rigorous methodology are needed.
Suicide by mental health in-patients under observation
Authors: Flynn S. , Nyathi T. , Tham S.-G. , Williams A. , Windfuhr K. , Kapur N. , Appleby L. , Shaw J.
Published: April 2017

Background

Observations in psychiatric in-patient settings are used to reduce suicide, self-harm, violence and absconding risk. The study aims were to describe the characteristics of in-patients who died by suicide under observation and examine their service-related antecedents.

Method

A national consecutive case series in England and Wales (2006–2012) was examined.

Results

There were 113 suicides by in-patients under observation, an average of 16 per year. Most were under intermittent observation. Five deaths occurred while patients were under constant observation. Patient deaths were linked with the use of less experienced staff or staff unfamiliar with the patient, deviation from procedures and absconding.

Conclusions

We identified key elements of observation that could improve safety, including only using experienced and skilled staff for the intervention and using observation levels determined by clinical need not resources.
Antipsychotic medication and long-term mortality risk in patients with schizophrenia; a systematic review and meta-analysis
Authors: Vermeulen J. , van Rooijen G. , Doedens P. , Numminen E. , van Tricht M. , de Haan L.
Published: April 2017

Patients with schizophrenia have a higher mortality risk than patients suffering from any other psychiatric disorder. Previous research is inconclusive regarding the association of antipsychotic treatment with long-term mortality risk. To this aim, we systematically reviewed the literature and performed a meta-analysis on the relationship between long-term mortality and exposure to antipsychotic medication in patients with schizophrenia. The objectives were to (i) determine long-term mortality rates in patients with schizophrenia using any antipsychotic medication; (ii) compare these with mortality rates of patients using no antipsychotics; (iii) explore the relationship between cumulative exposure and mortality; and (iv) assess causes of death. We systematically searched the EMBASE, MEDLINE and PsycINFO databases for studies that reported on mortality and antipsychotic medication and that included adults with schizophrenia using a follow-up design of more than 1 year. A total of 20 studies fulfilled our inclusion criteria. These studies reported 23,353 deaths during 821,347 patient years in 133,929 unique patients. Mortality rates varied widely per study. Meta-analysis on a subgroup of four studies showed a consistent trend of an increased long-term mortality risk in schizophrenia patients who did not use antipsychotic medication during follow-up. We found a pooled risk ratio of 0.57 (LL:0.46 UL:0.76 p value <0.001) favouring any exposure to antipsychotics. Statiscal heterogeneity was found to be high (Q = 39.31, I2 = 92.37%, p value < 0.001). Reasons for the increased risk of death for patients with schizophrenia without antipsychotic medication require further research. Prospective validation studies, uniform measures of antipsychotic exposure and classified causes of death are commendable.
Relocating Pastorian Medicine: Accommodation and Acclimatization of Pastorian Practices against Smallpox at the Pasteur Institute of Chengdu, China, 1908–1927
Authors: Liu Chien-Ling
Published: April 2017

Argument

Revising the diffusionist view of current scholarship on the Pasteur Institutes in China, this paper demonstrates the ways in which local networks and circumstances informed the circulation and construction of knowledge and practices relating to smallpox prophylaxis in the Southwest of China during the early twentieth century. I argue that the Pasteur Institute of Chengdu did not operate in a natural continuity with the preceding local French medical institutions, but rather presented an intentional break from them. This Institute, as the first established by the French in China, strove for political and administrative independence both from the Chinese authority and from the Catholic Church. Yet, its operation realized political independence only partially. The founding of this Institute was also an attempt to satisfy the medical demand for local vaccine production. However, even though the Institute succeeded at producing the Jennerian vaccine locally, its production needed to accommodate local conditions pertaining to the climate, vaccine strains, and animals. Furthermore, vaccination had to conform to Chinese variolation, including its social and medical practices, in order to achieve the collaboration of local Chinese traditional practitioners with French colonial physicians, who were Pastorian-trained and worked at the Pasteur Institute of Chengdu. Thus the nature of the Pastorian work in Chengdu was not an imposition of foreign standards and practices, but rather a mutual compromise and collaboration between the French and the Chinese.
Flattening and Unpacking Human Genetic Variation in Mexico, Postwar to Present
Authors: Anaya-Muñoz Víctor Hugo , García-Deister Vivette , Suárez-Díaz Edna
Published: April 2017

Argument

This paper analyzes the research strategies of three different cases in the study of human genetics in Mexico – the work of Rubén Lisker in the 1960s, INMEGEN's mapping of Mexican genomic diversity between 2004 and 2009, and the analysis of Native American variation by Andrés Moreno and his colleagues in contemporary research. We make a distinction between an approach that incorporates multiple disciplinary resources into sampling design and interpretation (unpacking), from one that privileges pragmatic considerations over more robust multidisciplinary analysis (flattening). These choices have consequences for social, demographic, and biomedical practices, and also for accounts of genetic variation in human populations. While the former strategyunpacksfine-grained genetic variation – favoring precision and realism, the latter tends toflattenindividual differences and historical depth in lieu of generalization.
The mediating roles of cortisol reactivity and executive functioning difficulties in the pathways between childhood histories of emotional insecurity and adolescent school problems
Authors: Martin Meredith J. , Davies Patrick T. , Cummings E. Mark , Cicchetti Dante
Published: April 2017

This study tested a hypothesized cascade in which children's insecure representations of the interparental relationship increase their school problems by altering children's cortisol reactivity to stress and their executive functioning. Participants included 235 families. The first of five measurement occasions occurred when the children were in kindergarten (M age = 6 years), and they were followed through the transition to high school. The results indicated that children's histories of insecure representations of the interparental relationship during the early school years were associated with executive functioning difficulties in adolescence (M age = 14 years). This in turn predicted subsequent increases in school adjustment difficulties 1 year later. In addition, elevated cortisol reactivity to interadult conflict mediated the association between early histories of insecurity and subsequent executive function problems in adolescence.
Rural Community Disaster Preparedness and Risk Perception in Trujillo, Peru
Authors: Stewart Matthew , Grahmann Bridget , Fillmore Ariel , Benson L. Scott
Published: April 2017

Introduction

Disasters will continue to occur throughout the world and it is the responsibility of the government, health care systems, and communities to adequately prepare for potential catastrophic scenarios. Unfortunately, low-and-middle-income countries (LMICs) are especially vulnerable following a disaster. By understanding disaster preparedness and risk perception, interventions can be developed to improve community preparedness and avoid unnecessary mortality and morbidity following a natural disaster.

Problem

The purpose of this study was to assess disaster preparedness and risk perception in communities surrounding Trujillo, Peru.

Methods

After designing a novel disaster preparedness and risk perception survey based on guidelines from the International Federation of Red Cross and Red Crescent Societies (IFRC; Geneva, Switzerland), investigators performed a cross-sectional survey of potentially vulnerable communities surrounding Trujillo, Peru. Data were entered and analyzed utilizing the Research Electronic Data Capture (REDCap; Harvard Catalyst; Boston, Massachusetts USA) database.

Results

A total of 230 study participants were surveyed, composed of 37% males, 63% females, with ages ranging from 18-85 years old. Those surveyed who had previously experienced a disaster (41%) had a higher perception of future disaster occurrence and potential disaster impact on their community. Overall, the study participants consistently perceived that earthquakes and infection had the highest potential impact of all disasters. Twenty-six percent of participants had an emergency supply of food, 24% had an emergency water plan, 24% had a first aid kit at home, and only 20% of the study participants had an established family evacuation plan.

Conclusion

Natural and man-made disasters will remain a threat to the safety and health of communities in all parts of the world, especially within vulnerable communities in LMICs; however, little research has been done to identify disaster perception, vulnerability, and preparedness in LMIC communities. The current study established that selected communities near Trujillo, Peru recognize a high disaster impact from earthquakes and infection, but are not adequately prepared for potential future disasters. By identifying high-risk demographics, targeted public health interventions are needed to prepare vulnerable communities in the following areas: emergency food supplies, emergency water plan, medical supplies at home, and establishing evacuation plans.

StewartM,GrahmannB,FillmoreA,BensonLS.Rural community disaster preparedness and risk perception in Trujillo, Peru.Prehosp Disaster Med.2017;32(4):387–392.
TWO TYPES OF LEGAL WRONGDOING
Authors: Newhouse M.E.
Published: April 2017

There are two distinct types of legal wrongdoing: civil and criminal. This article demonstrates in three ways that Immanuel Kant's Universal Principle of Right, properly interpreted, offers a plausible and resilient account of this important distinction. First, Kant's principle correctly identifies attempted crimes as crimes themselves even when they do not violate the rights of any individual. Second, it justifies our treatment of reckless endangerment as a crime by distinguishing it from ordinary negligence, traditionally thought to be only civilly wrong. Third, it explains and justifies differences between the features of traditional criminal punishments and the features of civil remedies. Moreover, the Universal Principle of Right yields a Kantian standard for criminal wrongdoing that is compelling enough to inform future philosophical inquiries into the nature and limits of the state's criminal lawmaking authority.
Atypical Local Interference Affects Global Processing in Children with Neurofibromatosis Type 1
Authors: Payne Jonathan M. , Porter Melanie A. , Bzishvili Samantha , North Kathryn N.
Published: April 2017

Objectives: To examine hierarchical visuospatial processing in children with neurofibromatosis type 1 (NF1), a single gene disorder associated with visuospatial impairments, attention deficits, and executive dysfunction. Methods: We used a modified Navon paradigm consisting of a large “global” shape composed of smaller “local” shapes that were either congruent (same) or incongruent (different) to the global shape. Participants were instructed to name either the global or local shape within a block. Reaction times, interference ratios, and error rates of children with NF1 (n=30) and typically developing controls (n=24) were compared. Results: Typically developing participants demonstrated the expected global processing bias evidenced by a vulnerability to global interference when naming local stimuli without a cost of congruence when naming global stimuli. NF1 participants, however, experienced significant interference from the unattended level when naming both local and global levels of the stimuli. Conclusions: Findings suggest that children with NF1 do not demonstrate the typical human bias of processing visual information from a global perspective. (JINS, 2017, 23, 446–450)
Dosimetric comparison of simultaneous integrated boost versus concomitant electron boost in radiotherapy treatment of breast cancer
Authors: Yuen C. Y. , Au W. L. , Chan W. L. , Yiu Y. T. , Law Y. Y. , Wong T. L.
Published: April 2017

Background

The aim of this study was to compare the dosimetric parameters and effects of simultaneous integrated boost (SIB) and traditional sequential electron boost, after helical tomotherapy, because of the lack of studies in this field in the current literature.

Methods

Computed tomographic data of 14 patients who received SIB in 2012–2015 were collected from Hong Kong Sanatorium & Hospital. New tomotherapy with SIB plans and tomotherapy with sequential boost plans were generated for each patient, and results were compared.

Results

Conformation number, mean dose, dose received by 95% volume (both sides), ipsilateral lung volume receiving 20 Gy (V20) and skin dose (right side) were found to be significantly better for SIB (p<0·05), however coverage index and gross target volume dose showed no significant difference, and heart dose was significantly higher for SIB on the right side.

Conclusion

Tomotherapy with SIB may be able to offer less organ at risk dose (except for the heart), while maintaining the ability to deliver adequate dose coverage.
Which simultaneous-integrated boost (SIB) intensity-modulated radiotherapy (IMRT) technique is dosimetrically superior in the treatment of breast cancer; volumetric-modulated arc therapy (VMAT) or fixed field (ff) IMRT?
Authors: Murphy Steven B. D. , Drury-Smith Heather
Published: April 2017

Background and purpose

To determine which concomitant boost technique is dosimetrically superior in the treatment of breast cancer; volumetric-modulated arc therapy (VMAT) or fixed field intensity-modulated radiotherapy (ff-IMRT).

Materials and methods

In total, 30 breast patients were re-planned with both VMAT and fixed field concomitant boost intensity-modulated radiotherapy techniques. A hybrid technique was used delivering 80% of the dose through tangential beams and 20% through an integrated boost. A two-tailed t-test sample for means was used to compare the dosimetric differences between the techniques.

Results

Maximum dose was statistically lower for VMAT; 103·2 versus 103·7% for ff-IMRT along with statistically lower V2 Gy doses to the contralateral lung (0·7 versus 1·6%) and heart for both left- (19·0%/22·6%), and right- (5·5%/8·8%) sided patients, respectively. ff-IMRT boasted significantly lower ipsilateral lung V20, V18 and V10 Gy (7·9/8·6/13·1 versus 8·1/8·8/13·4%) than VMAT, respectively. No differences were found with minimum coverage, mean dose and V5 Gy to all organs at risk (OARs).

Conclusion

VMAT and ff-IMRT techniques demonstrate excellent target coverage and OAR sparing facilitated by the hybrid planning technique and deep inspiration breath hold. There is no obvious dosimetrically superior option between the two techniques. Reduced treatment times with VMAT make it more desirable to implement clinically.
DISMANTLABLE CLASSIFYING SPACE FOR THE FAMILY OF PARABOLIC SUBGROUPS OF A RELATIVELY HYPERBOLIC GROUP
Authors: Martínez-Pedroza Eduardo , Przytycki Piotr
Published: April 2017

Let $G$ be a group hyperbolic relative to a finite collection of subgroups ${\mathcal{P}}$. Let ${\mathcal{F}}$ be the family of subgroups consisting of all the conjugates of subgroups in ${\mathcal{P}}$, all their subgroups, and all finite subgroups. Then there is a cocompact model for $E_{{\mathcal{F}}}G$. This result was known in the torsion-free case. In the presence of torsion, a new approach was necessary. Our method is to exploit the notion of dismantlability. A number of sample applications are discussed.
AUTOMATIC CONTINUITY FOR ISOMETRY GROUPS
Authors: Sabok Marcin
Published: April 2017

We present a general framework for automatic continuity results for groups of isometries of metric spaces. In particular, we prove automatic continuity property for the groups of isometries of the Urysohn space and the Urysohn sphere, i.e. that any homomorphism from either of these groups into a separable group is continuous. This answers a question of Ben Yaacov, Berenstein and Melleray. As a consequence, we get that the group of isometries of the Urysohn space has unique Polish group topology and the group of isometries of the Urysohn sphere has unique separable group topology. Moreover, as an application of our framework we obtain new proofs of the automatic continuity property for the group $\text{Aut}([0,1],\unicode[STIX]{x1D706})$, due to Ben Yaacov, Berenstein and Melleray and for the unitary group of the infinite-dimensional separable Hilbert space, due to Tsankov.
Can reducing tillage and increasing crop diversity benefit grain and forage production?
Authors: Weyers Sharon L. , Archer David W. , Forcella Frank , Gesch Russ , Johnson Jane M.F.
Published: April 2017

Benefits of reduced tillage and diverse crop rotations include reversing soil C loss, and improving soil quality and function. However, adoption of these strategies is lagging, particularly in the Upper Midwest, due to a perception that reduced tillage lowers crop yields. Therefore, an 8-year comparison of these conservation systems with a conventional, tilled, 2-year rotation system was conducted to evaluate effects on yields, system productivity (measured with potential gross returns) and weed seed densities. This study compared conventional moldboard plow + chisel till (CT) to reduced strip-tillage + no-tillage (ST), each with a 2-year (2y) or 4-year (4y) crop rotation, abbreviated as CT-2y, CT-4y, ST-2y and ST-4y. The 2y rotation was corn (Zea maysL.) and soybean (Glycine max[L.] Merr.); the 4y rotation was corn, soybean, spring wheat (Triticum aestivumL.) underseeded with alfalfa (Medicago sativaL.) and alfalfa. Only corn grain was significantly influenced by tillage strategy; CT systems yielded more than ST systems, regardless of rotation. Soybean grain yields were similar among CT-2y, CT-4y, ST-4y and lowest in the ST-2y. Yields of wheat and alfalfa were the same under both tillage strategies. Weed seed densities were higher in wheat and alfalfa, followed by corn then soybean, but were not influenced by tillage or rotation, nor universally negatively correlated to yield. Due to greater corn yields, overall system productivity was highest in CT-2y, the same between CT-4y and ST-2y, and lowest in ST-4y. Within years, productivity of CT-2y was different from only one other system at a time in 3 of 8 years and had the same productivity as all systems in another 3 of 8 years. Additionally, the similarity of productivity among three of four systems in 6 of 8 years indicated reduced tillage and diverse rotations have potential for adoption. Results support the need for research on a rotational tillage strategy, i.e., moldboard plowing before corn, to improve overall productivity if using ST before soybean, wheat and alfalfa.
Property as complex interaction
Authors: SMITH HENRY E.
Published: April 2017

In his important article, Benito Arruñada draws out the significance of sequential exchange for property rights and traces inadequacies in the economics of property rights to its overly contractual focus, to the exclusion of multiple transactions on the same asset. In this comment, I argue that although Arruñada's problem is a genuine one, it is part of a larger inadequacy in the economic analysis of property rights: property institutions have to manage complexity stemming from many kinds of interactions, making it problematic to focus solely on local interactions. Modular structures in property, including legal ‘things’ themselves, serve to manage this complexity. The larger problem of complexity allows us to set sequential exchange in its proper context.
Design and development of a stacked complementary microstrip antenna with a “π”-shaped DGS for UWB, UNII, WLAN, WiMAX, and Radio Astronomy wireless applications
Authors: Kaur Amanpreet , Khanna Rajesh
Published: April 2017

The proposed research paper presents the design, development, and experimental testing of a broadband stacked complementary microstrip antenna for ultra-wideband (UWB) (5.28–5.85 GHz), Unlicensed National Information Infrastructure band (UNII) (5.25–5.825 GHz), wireless local area networks (WLAN, IEEE802.11a, 5.15–5.35 GHz), and IEEE 802.11b (5.75–5.85 GHz), Worldwide Interoperability for Microwave Access band (5.25–5.85 GHz), and Radio Astronomy band (6.6–6.75 GHz) wireless applications. The main aim of this paper is to obtain an UWB behavior from the combined effect of two resonances exhibited by the driven and parasitic patches of a stacked complementary antenna geometry. Circularly polarized radiations are also emitted by the antenna by the addition of an orthogonal stub to its feed line. The proposed three-layered antenna structure (without air gap) is fabricated on commercially available glass-reinforced epoxy laminate, FR4 substrate. The topmost layer of FR4 has a square-shaped patch parasitic patch printed over it; this patch has a square slot etched out from it. The middle layer of the antenna has a square-shaped driven patch of approximately the same dimensions as that of the slot in parasitic patch. The antenna is fed using aperture-coupled feeding mechanism. Therefore the lowermost layer of FR4 has a ground plane on its top with a “π”-shaped slot etched from it and a feed line with an orthogonal stub at its bottom forming a “T”-shaped geometry. The antenna is fed by the electromagnetic coupling between the antenna layers .The proposed antenna has a compact structure with overall volumetric dimensions of 4.7 × 3.82 × 0.483 cm3. The antenna design and simulations are carried out using CSTMWSV'10 with perfect boundary (electric and magnetic) estimations. This designed antenna shows an UWB behavior from 5.14 to 5.85 GHz with an impedance bandwidth of 710 MHZ and a fractional bandwidth of 12.62% at the center frequency of band at 5.5 GHz. The radiating antenna also possesses a good gain of 4.59 dBi at the central frequency of 5.50 GHz and a 1 dB axial ratio bandwidth of 820 MHz from 5.16 to 5.98 GHz. The validation of results is done by fabrication and experimental testing of the antenna using a vector network analyzer and placing the antenna in an anechoic chamber for gain measurements. The measured results show close matching with the simulated ones and this makes the antenna well suited for the proposed wireless applications of interest, specifically in small handheld wireless communication devices.
A low phase noise and frequency agility synthesizer for millimeter-wave transceiver
Authors: Fu Qianhua
Published: April 2017

With the increasing demand of millimeter-wave (MMW) communication, the performance of its frequency synthesizer has high requirements. In this paper, a multiple conversion mechanism, which used hybrid frequency synthesis technique is presented. Some key modules include linear frequency-modulated generator, agile, and low phase noise local oscillators (LOs), automatic gain control, receiver front-end circuit, and MMW LO circuits are discussed and simulated to verify correctness of the mechanism. The experimental results show that, spurious is better than −65 dBc, phase noise is no more than −80 dBc/Hz@1 kHz, and the maximum frequency-hopping time is <1.8µs.
Survey of Missouri Pesticide Applicator Practices, Knowledge, and Perceptions
Authors: Bish Mandy D. , Bradley Kevin W.
Published: April 2017

The introduction of soybean and cotton traits with resistance to synthetic auxin herbicides has led to an increase in concern over the off-target movement of dicamba and 2,4-D. A direct-mail survey was sent to Missouri pesticide applicators in January of 2016 to understand current herbicide application practices and applicator knowledge and awareness of the new synthetic auxin technologies. Completed surveys were returned by 2,335 applicators, representing approximately 11% of the state’s registered pesticide applicators. Survey data reported herein provides information regarding current pesticide applicator knowledge and practices and highlights areas that need more emphasis during applicator training. Overall, survey respondents were familiar with physical drift and methods to minimize that risk. However respondents were less familiar with volatility and temperature inversions, which can each influence off-target herbicide movement. Of the 427 commercial applicators and 1,535 noncommercial applicators who answered questions regarding volatility, 81% and 74% respectively, recognized that high temperatures can contribute to a herbicide’s ability to volatilize. However, only 48% and 39% understood that a herbicide’s vapor pressure influences volatility. Answers from the survey indicate further education is needed on the synthetic auxin technologies, such as what herbicides can be used with each technology, proper methods for inspecting and cleaning spray equipment, and the importance of reading herbicide labels. When asked whether applicators were aware of the new 2,4-D-resistant and dicamba-resistant traits, 76% of 443 commercial applicators and only 40% of 1,713 noncommercial applicators selected “yes.” Additionally, survey results suggests that current methods aimed to facilitate communication among producers and applicators, such as FieldWatch and Flag the Technology, may not be successfully adopted, at least in Missouri. Findings from this survey can be utilized to enhance training of pesticide applicators in preparation for the synthetic auxin herbicide technologies.
For Magnetic Reconnection Energy, O—not X—Might Mark the Spot
Authors: Zastrow Mark
Published: April 2017

A new analysis of satellite data could upend conventional wisdom about how solar storms produce their dangerous radiation—not from X-shaped mergers of magnetic field lines but from swirling vortices.
"Fingerprinting" Volcanic Tremors May Help Forecast Eruptions
Authors: Joel Lucas
Published: April 2017

Volcano seismic waves produce distinct tremor patterns, or "fingerprints," shared by different kinds of volcanoes.
Chemical microenvironments and single-cell carbon and nitrogen uptake in field-collected colonies of Trichodesmium under different pCO2
Authors: Eichner Meri J , Klawonn Isabell , Wilson Samuel T , Littmann Sten , Whitehouse Martin J , Church Matthew J , Kuypers Marcel M M , Karl David M , Ploug Helle
Published: April 2017

Gradients of oxygen (O2) and pH, as well as small-scale fluxes of carbon (C), nitrogen (N) and O2 were investigated under different partial pressures of carbon dioxide (pCO2) in field-collected colonies of the marine dinitrogen (N2)-fixing cyanobacterium Trichodesmium. Microsensor measurements indicated that cells within colonies experienced large fluctuations in O2, pH and CO2 concentrations over a day–night cycle. O2 concentrations varied with light intensity and time of day, yet colonies exposed to light were supersaturated with O2 (up to ~200%) throughout the light period and anoxia was not detected. Alternating between light and dark conditions caused a variation in pH levels by on average 0.5 units (equivalent to 15 nmol l−1 proton concentration). Single-cell analyses of C and N assimilation using secondary ion mass spectrometry (SIMS; large geometry SIMS and nanoscale SIMS) revealed high variability in metabolic activity of single cells and trichomes of Trichodesmium, and indicated transfer of C and N to colony-associated non-photosynthetic bacteria. Neither O2 fluxes nor C fixation by Trichodesmium were significantly influenced by short-term incubations under different pCO2 levels, whereas N2 fixation increased with increasing pCO2. The large range of metabolic rates observed at the single-cell level may reflect a response by colony-forming microbial populations to highly variable microenvironments.
Ecological dynamics and co-occurrence among marine phytoplankton, bacteria and myoviruses shows microdiversity matters
Authors: Needham David M , Sachdeva Rohan , Fuhrman Jed A
Published: April 2017

Numerous ecological processes, such as bacteriophage infection and phytoplankton–bacterial interactions, often occur via strain-specific mechanisms. Therefore, studying the causes of microbial dynamics should benefit from highly resolving taxonomic characterizations. We sampled daily to weekly over 5 months following a phytoplankton bloom off Southern California and examined the extent of microdiversity, that is, significant variation within 99% sequence similarity clusters, operational taxonomic units (OTUs), of bacteria, archaea, phytoplankton chloroplasts (all via 16S or intergenic spacer (ITS) sequences) and T4-like-myoviruses (via g23 major capsid protein gene sequence). The extent of microdiversity varied between genes (ITS most, g23 least) and only temporally common taxa were highly microdiverse. Overall, 60% of taxa exhibited microdiversity; 59% of these had subtypes that changed significantly as a proportion of the parent taxon, indicating ecologically distinct taxa. Pairwise correlations between prokaryotes and myoviruses or phytoplankton (for example, highly microdiverse Chrysochromulina sp.) improved when using single-base variants. Correlations between myoviruses and SAR11 increased in number (172 vs 9, Spearman>0.65) and became stronger (0.61 vs 0.58, t-test: P<0.001) when using SAR11 ITS single-base variants vs OTUs. Whole-community correlation between SAR11 and myoviruses was much improved when using ITS single-base variants vs OTUs, with Mantel rho=0.49 vs 0.27; these results are consistent with strain-specific interactions. Mantel correlations suggested >1 μm (attached/large) prokaryotes are a major myovirus source. Consideration of microdiversity improved observation of apparent host and virus networks, and provided insights into the ecological and evolutionary factors influencing the success of lineages, with important implications to ecosystem resilience and microbial function.
Past penguin colony responses to explosive volcanism on the Antarctic Peninsula
Authors: Roberts Stephen J. , Monien Patrick , Foster Louise C. , Loftfield Julia , Hocking Emma P. , Schnetger Bernhard , Pearson Emma J. , Juggins Steve , Fretwell Peter , Ireland Louise , Ochyra Ryszard , Haworth Anna R. , Allen Claire S. , Moreton Steven G. , Davies Sarah J. , Brumsack Hans-Jürgen , Bentley Michael J. , Hodgson Dominic A.
Published: April 2017

Changes in penguin populations on the Antarctic Peninsula have been linked to several environmental factors, but the potentially devastating impact of volcanic activity has not been considered. Here we use detailed biogeochemical analyses to track past penguin colony change over the last 8,500 years on Ardley Island, home to one of the Antarctic Peninsula’s largest breeding populations of gentoo penguins. The first sustained penguin colony was established on Ardley Island c. 6,700 years ago, pre-dating sub-fossil evidence of Peninsula-wide occupation by c. 1,000 years. The colony experienced five population maxima during the Holocene. Overall, we find no consistent relationships with local-regional atmospheric and ocean temperatures or sea-ice conditions, although the colony population maximum, c. 4,000–3,000 years ago, corresponds with regionally elevated temperatures. Instead, at least three of the five phases of penguin colony expansion were abruptly ended by large eruptions from the Deception Island volcano, resulting in near-complete local extinction of the colony, with, on average, 400–800 years required for sustainable recovery.
Topological superconductivity in monolayer transition metal dichalcogenides
Authors: Hsu Yi-Ting , Vaezi Abolhassan , Fischer Mark H. , Kim Eun-Ah
Published: April 2017

Theoretically, it has been known that breaking spin degeneracy and effectively realizing spinless fermions is a promising path to topological superconductors. Yet, topological superconductors are rare to date. Here we propose to realize spinless fermions by splitting the spin degeneracy in momentum space. Specifically, we identify monolayer hole-doped transition metal dichalcogenide (TMD)s as candidates for topological superconductors out of such momentum-space-split spinless fermions. Although electron-doped TMDs have recently been found superconducting, the observed superconductivity is unlikely topological because of the near spin degeneracy. Meanwhile, hole-doped TMDs with momentum-space-split spinless fermions remain unexplored. Employing a renormalization group analysis, we propose that the unusual spin-valley locking in hole-doped TMDs together with repulsive interactions selectively favours two topological superconducting states: interpocket paired state with Chern number 2 and intrapocket paired state with finite pair momentum. A confirmation of our predictions will open up possibilities for manipulating topological superconductors on the device-friendly platform of monolayer TMDs.
Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons
Authors: Zemcov Michael , Immel Poppy , Nguyen Chi , Cooray Asantha , Lisse Carey M. , Poppe Andrew R.
Published: April 2017

The cosmic optical background is an important observable that constrains energy production in stars and more exotic physical processes in the universe, and provides a crucial cosmological benchmark against which to judge theories of structure formation. Measurement of the absolute brightness of this background is complicated by local foregrounds like the Earth’s atmosphere and sunlight reflected from local interplanetary dust, and large discrepancies in the inferred brightness of the optical background have resulted. Observations from probes far from the Earth are not affected by these bright foregrounds. Here we analyse the data from the Long Range Reconnaissance Imager (LORRI) instrument on NASA’s New Horizons mission acquired during cruise phase outside the orbit of Jupiter, and find a statistical upper limit on the optical background’s brightness similar to the integrated light from galaxies. We conclude that a carefully performed survey with LORRI could yield uncertainties comparable to those from galaxy counting measurements.