bluuebunny/crossref_metadata_2025 huggingface dataset:
Tension-only ideal dissipative bracing for the seismic retrofit of precast industrial buildings
Authors: Dal Lago Bruno , Naveed Muhammad , Lamperti Tornaghi Marco
Published: June 2021

New precast frame industrial structures are seismically designed according to reliable modern criteria. However, most of the existing built stock hosting many workers and both regular and strategic industrial activities was designed and detailed neglecting the earthquake load or according to outdated seismic design criteria and regulations. Its seismic retrofit is a main challenge for the Engineering Community and a critical objective for institutional and private bodies. Among the envisaged solutions, the introduction of dissipative braces appears to be promising, although mostly inapplicable for these buildings, due to the brace lengths required by their typical large dimensions and the related proportioning against buckling. In this paper, an innovative seismic retrofitting technique based on monolateral dissipative bracing is investigated. The device proposed in this paper, yet in phase of preliminary design and testing, dissipates energy through friction in tension only while freely deforming in compression, which makes the issue related to compressive buckling irrelevant. A numerical analysis is carried out to investigate the efficiency of the proposed device in seismic retrofitting of precast industrial frame buildings with the aim to explore its feasibility and to better orient the definition of the slip threshold load range and the future development of the physical device. The simplified Capacity Spectrum Method (CSM) is employed for the global framing of the structural behaviour of the highly nonlinear retrofitted structures under seismic actions. A numerical tool is set to automatically apply the CSM based on the definition of few main parameters governing the seismic response of precast frame structures. The efficacy of the CSM is critically analysed through the comparison with the results of a set of nonlinear dynamic analyses. A smart simplified design process aimed at framing the most efficient threshold slip/yield load of the device given an existing structural configuration is presented with the application of the CSM through the identification of the most efficient performance indicator related to either displacement, shear force, equivalent dissipation of energy or a combination of them.
Correction to: Housing Affordability, Housing Tenure Status and Household Density: Are Housing Characteristics Associated with Union Dissolution?
Authors: Krapf Sandra , Wagner Michael
Published: June 2021

A correction to this paper has been published: https://doi.org/10.1007/s10680-021-09587-z
Technological troubleshooting based on sentence embedding with deep transformers
Authors: Alfeo Antonio L. , Cimino Mario G. C. A. , Vaglini Gigliola
Published: June 2021

In nowadays manufacturing, each technical assistance operation is digitally tracked. This results in a huge amount of textual data that can be exploited as a knowledge base to improve these operations. For instance, an ongoing problem can be addressed by retrieving potential solutions among the ones used to cope with similar problems during past operations. To be effective, most of the approaches for semantic textual similarity need to be supported by a structured semantic context (e.g. industry-specific ontology), resulting in high development and management costs. We overcome this limitation with a textual similarity approach featuring three functional modules. The data preparation module provides punctuation and stop-words removal, and word lemmatization. The pre-processed sentences undergo the sentence embedding module, based on Sentence-BERT (Bidirectional Encoder Representations from Transformers) and aimed at transforming the sentences into fixed-length vectors. Their cosine similarity is processed by the scoring module to match the expected similarity between the two original sentences. Finally, this similarity measure is employed to retrieve the most suitable recorded solutions for the ongoing problem. The effectiveness of the proposed approach is tested (i) against a state-of-the-art competitor and two well-known textual similarity approaches, and (ii) with two case studies, i.e. private company technical assistance reports and a benchmark dataset for semantic textual similarity. With respect to the state-of-the-art, the proposed approach results in comparable retrieval performance and significantly lower management cost: 30-min questionnaires are sufficient to obtain the semantic context knowledge to be injected into our textual search engine.
Study on operational space control of a redundant robot with un-actuated joints: experiments under actuation failure scenarios
Authors: Lee Yisoo , Tsagarakis Nikos , Lee Jinoh
Published: June 2021

This paper analyzes operational space dynamics for redundant robots with un-actuated joints and reveals their highly nonlinear dynamic impacts on operational space control (OSC) tasks. Unlike conventional OSC approaches that partly address the under-actuated system by introducing rigid grasping or contact constraints, we deal with the problem even without such physical constraints which have been overlooked, yet it includes a wide range of applications such as free-floating robots and manipulators with passive joints or unwanted actuation failure. In addition, as an intuitive application example of the drawn result, an OSC is formulated as an optimization problem to alleviate the dynamics disturbance stemmed from the un-actuated joints and to satisfy other inequality constraints. The dynamic analysis and the proposed control method are verified by a number of numerical simulations as well as physical experiments with a 7-degrees-of-freedom robotic arm. In particular, we consider joint actuation failure scenarios that can be occurred at certain joints of a torque-controlled robot and practical case studies are performed with an actual redundant robot arm.
Thomas Aquinas and Hervaeus Natalis on First and Second Intentionality
Authors: Amerini Fabrizio
Published: June 2021

Thomas Aquinas and Hervaeus Natalis (†1323) share a correlational theory of intentionality. When I cognize a thing, I am in a real relation with the thing cognized and at the same time the thing is in a relation of reason with me. Hervaeus coins the term “intentionality” to designate precisely this relation of reason. First and second intentionality express two stages of this relation. First intentionality refers to the relation that a thing has to the mind, while second intentionality indicates the relation that a thing qua cognized has to the mind. Thus, first intentionality involves direct cognition, while second intentionality reflexive cognition. This theory of intentionality has two purposes: first, to de-psychologize the cognitive process and second, to allow the application of Aristotle’s table of categories to the sphere of the mental. Through his detailed analysis of the relation of intentionality, Hervaeus clarifies some of Thomas’s obscurer points, but at the same time he has to solve a delicate problem of circularity entailed by the notion of intentionality as a relation of reason.
A unified model-implied instrumental variable approach for structural equation modeling with mixed variables
Authors: Jin Shaobo , Yang-Wallentin Fan , Bollen Kenneth A.
Published: June 2021

The model-implied instrumental variable (MIIV) estimator is an equation-by-equation estimator of structural equation models that is more robust to structural misspecifications than full information estimators. Previous studies have concentrated on endogenous variables that are all continuous (MIIV-2SLS) or all ordinal. We develop a unified MIIV approach that applies to a mixture of binary, ordinal, censored, or continuous endogenous observed variables. We include estimates of factor loadings, regression coefficients, variances, and covariances along with their asymptotic standard errors. In addition, we create new goodness of fit tests of the model and overidentification tests of single equations. Our simulation study shows that the proposed MIIV approach is more robust to structural misspecifications than diagonally weighted least squares (DWLS) and that both the goodness of fit model tests and the overidentification equations tests can detect structural misspecifications. We also find that the bias in asymptotic standard errors for the MIIV estimators of factor loadings and regression coefficients are often lower than the DWLS ones, though the differences are small in large samples. Our analysis shows that scaling indicators with low reliability can adversely affect the MIIV estimators. Also, using a small subset of MIIVs reduces small sample bias of coefficient estimates, but can lower the power of overidentification tests of equations.
Is sewage sludge a valuable fertilizer? A soil microbiome and resistome study under field conditions
Authors: Markowicz Anna , Bondarczuk Kinga , Wiekiera Aleksandra , Sułowicz Sławomir
Published: June 2021

Purpose

Sewage sludge land application is strongly recommended to improve soil quality and fertility despite the presence of pollutants, pathogens and antibiotic resistance genes. This study aimed to assess the fertilization value of low and recommended by law sewage sludge dose (15 t ha−1).

Materials and methods

In a 540-day field study, the effect of sewage sludge on the soil physicochemical and microbial parameters, emphasising antibiotic and metal resistance spread, was investigated.

Results

In contrast to expectations, sewage sludge did not improve the organic matter, nutrient content and microbial activity in the soil; therefore, the fertilization effect was not achieved. Moreover, an increase in the bioavailable Cd, Ni and Cu content was observed. Canonical correspondence analysis revealed that these increases mainly explain the changes in the soil microbial community. Sixteen resistance genes and four integron classes were detected in both the total DNA and on plasmids isolated from sewage sludge. Obtained plasmids confer β-lactam resistance or extreme resistance to tetracycline (> 256 μg mL−1). Two antibiotic resistance genes (blaNPS-2, tetA) were transferred into the fertilized soil and detected up to 6 months after the fertilization.

Conclusion

Our results provide evidence that the regulated dose of sewage sludge, even when characterized by low total metal content, may affect soil microbial microbiome and resistome. Therefore, these findings provide critical data that have public health implications, which may raise concerns about the suitability of applying sewage sludge to the soil even at the low regulated dose.
Enhanced culturing techniques for the mycobiont isolated from the lichen Xanthoria parietina
Authors: Pichler Gregor , Candotto Carniel Fabio , Muggia Lucia , Holzinger Andreas , Tretiach Mauro , Kranner Ilse
Published: June 2021

Lichens and their isolated symbionts are potentially valuable resources for biotechnological approaches. Especially mycobiont cultures that produce secondary lichen products are receiving increasing attention, but lichen mycobionts are notoriously slow-growing organisms. Sufficient biomass production often represents a limiting factor for scientific and biotechnological investigations, requiring improvement of existing culturing techniques as well as methods for non-invasive assessment of growth. Here, the effects of pH and the supplement of growth media with either D-glucose or three different sugar alcohols that commonly occur in lichens, D-arabitol, D-mannitol and ribitol, on the growth of the axenically cultured mycobiont isolated from the lichen Xanthoria parietina were tested. Either D-glucose or different sugar alcohols were offered to the fungus at different concentrations, and cumulative growth and growth rates were assessed using two-dimensional image analysis over a period of 8 weeks. The mycobiont grew at a pH range from 4.0 to 7.0, whereas no growth was observed at higher pH values. Varying the carbon source in Lilly-Barnett medium (LBM) by replacing 1% D-glucose used in the originally described LBM by either 1%, 2% or 3% of D-mannitol, or 3% of D-glucose increased fungal biomass production by up to 26%, with an exponential growth phase between 2 and 6 weeks after inoculation. In summary, we present protocols for enhanced culture conditions and non-invasive assessment of growth of axenically cultured lichen mycobionts using image analysis, which may be useful for scientific and biotechnological approaches requiring cultured lichen mycobionts.
A block coordinate descent method for sensor network localization
Authors: Nishijima Mitsuhiro , Nakata Kazuhide
Published: June 2021

The problem of sensor network localization (SNL) can be formulated as a semidefinite programming problem with a rank constraint. We propose a new method for solving such SNL problems. We factorize a semidefinite matrix with the rank constraint into a product of two matrices via the Burer–Monteiro factorization. Then, we add the difference of the two matrices, with a penalty parameter, to the objective function, thereby reformulating SNL as an unconstrained multiconvex optimization problem, to which we apply the block coordinate descent method. In this paper, we also provide theoretical analyses of the proposed method and show that each subproblem that is solved sequentially by the block coordinate descent method can also be solved analytically, with the sequence generated by our proposed algorithm converging to a stationary point of the objective function. We also give a range of the penalty parameter for which the two matrices used in the factorization agree at any accumulation point. Numerical experiments confirm that the proposed method does inherit the rank constraint and that it estimates sensor positions faster than other methods without sacrificing the estimation accuracy, especially when the measured distances contain errors.
Telephone consultations to manage paediatric outpatient clinics during the COVID-19 pandemic: a service evaluation
Authors: Edwards Lowri M. , Parry Mair
Published: June 2021

Background

North West Wales is predominantly rural with a relatively small population spread over a large geographical area. The rapid development of the COVID-19 pandemic led to a radical re-thinking of how to provide continuing paediatric outpatient care in the face of a lockdown. The solution adopted was to use telephone consultations.

Aims

This study took place during the summer of 2020, after the first lockdown had been relaxed. The purpose of this study was to evaluate the acceptability of telephone consultations as an alternative to conventional paediatric outpatient appointments and assess whether it could continue to have a useful role beyond the pandemic.

Methods

Two hundred ninety-five telephone surveys were conducted with respondents, most of whom were carers of paediatric outpatients. Questions explored the child’s underlying condition, respondents’ attitudes towards the service received, social factors including distance previously travelled to the hospital and whether they would find ongoing telephone review acceptable or not.

Results

Sixty-one percent of respondents expressed a positive interest in ongoing telephone consultations. They commented particularly on compatibility with work commitments, childcare arrangements and travel times. Those travelling more than 1 h were particularly positive in their support. Respondents expressed the continued need for face-to-face review if the child’s condition changed acutely.

Conclusion

Telephone consultations are an acceptable means of improving clinic punctuality, accessibility and convenience for families in rural areas, with ongoing potential beyond the pandemic. Careful consideration is required of the individual’s needs and requirement for physical examination when extending the use of telephone consultations.
Micro-RNA-338-3p Promotes the Development of Atherosclerosis by Targeting Desmin and Promoting Proliferation
Authors: Yan Shiran , Chen Jing , Zhang Teng , Zhou Jian , Wang Ge , Li Yanfen
Published: June 2021

Atherosclerosis (AS) is a dynamic and multi-stage process that involves various cells types, such as vascular smooth muscle cells (VSMCs) and molecules such as microRNAs. In this study, we investigated how miR-338-3p works in the process of AS. To determine how miR-338-3p was expressed in AS, an AS rat model was established and primary rat VSMCs were cultured. Real-time polymerase chain reaction was performed to detect miR-338-3p expression. Markers of different VSMC phenotypes were tested by Western blot. Immunofluorescent staining was employed to observe the morphologic changes of VSMCs transfected with miR-338-3p mimics. A dual luciferase reporter assay system was used to verify that desmin was a target of miR-338-3p. To further identify the role of miR-338-3p in the development of AS, VSMC proliferation and migration were evaluated by EdU incorporation assay, MTT assay, and wound healing assay. miR-338-3p expression was upregulated in the aortic tissues of an AS rat model and in primary rat VSMCs from a later passage. The transfection of miR-338-3p mimics in VSMCs promoted the synthetic cell phenotype. Bioinformatics analysis proposed desmin as a candidate target for miR-338-3p and the dual luciferase reporter assay confirmed in vivo that desmin was a direct target of miR-338-3p. The MTT and EdU incorporation assay revealed increased cell viability when miR-338-3p mimics were transfected. The increased expression of PCNA was a consistent observation, although a positive result was not obtained with respect to VSMC mobility. In AS, miR-338-3p expression was elevated. Elevated miR-338-3p inhibited the expression of desmin, thus promoting the contractile-to-synthetic VSMC phenotypic transition. In addition to morphologic changes, miR-338-3p enhanced the proliferative but not mobile ability of VSMCs. In summary, miR-338-3p promotes the development of AS.
The experience of parents faced with the admission of their adolescent to a child and adolescent psychiatric inpatient unit. A qualitative study with focus groups
Authors: Merayo-Sereno Beatriz , Fernández-Rivas Aránzazu , de Oliveira-Silva Keyth Lany , Sánchez-Andérez Francisco-Javier , Sesma-Pardo Eva , Vivanco-González Esther , González-Torres Miguel Ángel
Published: June 2021

The admission of an adolescent to a child and adolescent psychiatric inpatient unit has a serious impact on the entire family unit. The emotional experience of those primary caregivers has been scarcely studied qualitatively despite being recommended by previous research. This study aims to examine the experience of parents of adolescents with mental health needs that required psychiatric hospitalization in a child and adolescent unit. Qualitative cross-sectional research was carried out under the recommendations of Grounded Theory with three Focus Groups of parents (N = 22) of adolescents who required psychiatric hospitalization in a child and adolescent ward. The COREQ quality criteria were applied. The parental experience implies a high level of emotional suffering modulated by feelings of guilt, stigma, parental awareness of their child’s illness and the passage of time. The use of Prochaska’s and Diclemente’s trans-theoretical model of health behavior change is useful in understanding the parental experience.
Context aware benchmarking and tuning of a TByte-scale air quality database and web service
Authors: Betancourt Clara , Hagemeier Björn , Schröder Sabine , Schultz Martin G.
Published: June 2021

We present context-aware benchmarking and performance engineering of a mature TByte-scale air quality database system which was created by the Tropospheric Ozone Assessment Report (TOAR) and contains one of the world’s largest collections of near-surface air quality measurements. A special feature of our data servicehttps://join.fz-juelich.deis on-demand processing of several air quality metrics directly from the TOAR database. As a service that is used by more than 350 users of the international air quality research community, our web service must be easily accessible and functionally flexible, while delivering good performance. The current on-demand calculations of air quality metrics outside the database together with the necessary transfer of large volume raw data are identified as the major performance bottleneck. In this study, we therefore explore and benchmark in-database approaches for the statistical processing, which results in performance enhancements of up to 32%.
Variations of Weyl’s Tube Formula
Authors: Burtscher Annegret , Heckman Gert
Published: June 2021

In 1939 Weyl showed that the volume of spherical tubes around compact submanifolds M of Euclidean space depends solely on the induced Riemannian metric on M. Can this intrinsic nature of the tube volume be preserved for tubes with more general cross sections $$\mathbb {D}$$
D
than the round ball? Under sufficiently strong symmetry conditions on $$\mathbb {D}$$
D
the answer turns out to be yes.
Kin Against Kin: Internal Co-selection and the Coherence of Kinship Typologies
Authors: Passmore Sam , Barth Wolfgang , Quinn Kyla , Greenhill Simon J. , Evans Nicholas , Jordan Fiona M.
Published: June 2021

Across the world people in different societies structure their family relationships in many different ways. These relationships become encoded in their languages as kinship terminology, a word set that maps variably onto a vast genealogical grid of kinship categories, each of which could in principle vary independently. But the observed diversity of kinship terminology is considerably smaller than the enormous theoretical design space. For the past century anthropologists have captured this variation in typological schemes with only a small number of model system types. Whether those types exhibit the internal co-selection of parts implicit in their use is an outstanding question, as is the sufficiency of typologies in capturing variation as a whole. We interrogate the coherence of classic kinship typologies using modern statistical approaches and systematic data from a new database, Kinbank. We first survey the canonical types and their assumed patterns of internal and external co-selection, then present two data-driven approaches to assess internal coherence. Our first analysis reveals that across parents’ and ego’s (one’s own) generation, typology has limited predictive value: knowing the system in one generation does not reliably predict the other. Though we detect limited co-selection between generations, “disharmonic” systems are equally common. Second, we represent structural diversity with a novel multidimensional approach we term kinship space. This approach reveals, for ego’s generation, some broad patterning consistent with the canonical typology, but diversity (and mixed systems) is considerably higher than classical typologies suggest. Our results strongly challenge the descriptive adequacy of the set of canonical kinship types.
A review on design and testing methodologies of modern freight train draft gear system
Authors: Wagner Simon , Cole Colin , Spiryagin Maksym
Published: June 2021

Rolling stock connection systems are key to running longer and heavier trains as they provide both the connections of vehicles and the damping, providing the longitudinal suspension of the train. This paper focuses on the evolution of both connection and stiffness damping systems. Focus is on freight rolling stock, but passenger draw gears are also examined. It was found that connection systems have evolved from the buff and chain system used in the pioneer railways of the 1800s to the modern auto-coupler connection systems that are in-service worldwide today. Refined versions of the buff and chain coupling are, however, still in use in the EU, UK, South America and India. A wide range of auto-coupler systems are currently utilised, but the AAR coupler (Janney coupler) remains the most popular. A further variation that persists is the SA3 coupler (improved Wilson coupler) which is an alternative auto-coupler design used mainly throughout the former Soviet Union. Restricting the review to auto-coupler systems allowed the paper to focus on draft gears which revealed polymer, polymer-friction, steel spring-friction, hydraulic draft gears and sliding sill cushioning systems. Along with the single compressive draft gear units balanced and floating plate configurations are also presented. Typical draft gear acceptance standards are presented along with modelling that was included to aid in presentation of the functional characteristics of draft gears.
Low-temperature atmospheric discharge plasma and its applications for the surface treatment
Authors: Kogoma Masuhiro , Tanaka Kunihito
Published: June 2021

The atmospheric pressure low-temperature homogeneous discharge using helium and nitrogen, both known for industrial applications, was reviewed. In case of helium, metastable atoms (21s and 23s) produced in the glow discharge were able to dissociate mixed molecular gases to produce radicals or atoms. Radical species undergo chemical reactions, such as oxidation or nitration reaction and form products on the electrode surfaces. Applications of helium atmospheric pressure glow discharge including surface treatment of plastic films to enhance adhesibility with glue, weakening strength with pressure-sensitive glue, and deposition of solid material on a flat plate or powder surfaces, were described. Moreover, the microwave low-temperature discharge using nitrogen, as a cost-saving carrier gas, were introduced for the surface cleaning of silicon wafer.
Heavy metals pollution indexing, geospatial and statistical approaches of groundwater within Challawa and Sharada industrial areas, Kano City, North-Western Nigeria
Authors: Hamidu Hassan , Halilu Falalu B. , Yerima Kwaya M. , Garba Lawal M. , Suleiman Arabi A. , Kankara Aliyu I. , Abdullahi Ibrahim M.
Published: June 2021

The present study focused on pollution status of groundwater in the industrial areas of Challawa and Sharada in Kano city based on pollution indices, statistical and spatial analyses. Twenty groundwater samples representing groundwater of the studied areas (Ten from each area) were analyzed for the presence of Cd, Cr, Ni, Fe, Mn and Zn using atomic absorption spectrophotometer. The result showed 95%, 5%, 60%, 15% and 25% of the analyzed water samples had detectable Cd, Cr, Ni, Fe, and Mn above the drinking water limits of both Nigerian standards for drinking water quality NSDWQ and World Health Organization (WHO) with Cd dominating other analyzed heavy metals in the groundwater. Evaluation of heavy metal pollution revealed a low polluted status based on the contaminant index (Cd), synthetic pollution index, heavy metals evaluation index, and heavy metal pollution index. Metal index categorized the groundwater as seriously polluted. The statistical evaluation gave strong and positive correlations between indices and a moderate one between the metallic ions. Component analysis revealed a strongly positive loading of Fe, Ni and Zn while Cd had a strong negative loading. Cr and Mn were positive and moderately loaded. Statistical analyses suggested both anthropogenic and geogenic sources for the heavy metals mainly from the industrial and agricultural practices and rock weathering processes, respectively. This study is expected to be a useful tool in the planning, monitoring and mitigation of pollution activities in the area.

Article Highlights

The pollution status of groundwater with respect to heavy metals was investigated in the Challawa and Sharada industrials zones in Kano city Nigeria

The concentration of Cd, Fe, Ni, Cr Mn and Zn was determined using the AAS

Different Pollution indices of HPI, HEI, SPI, Cd and MI were utilized to categorized the area as low, medium and highly polluted.

Spatial and temporal distribution maps demarcated based on the metal concentrations and computed indices in the area.

CA, PCA, and HCA were used to identified the geochemistry, relationship, sources and origin of heavy metals in groundwater.

The study revealed zones with low to high-risk groundwater in terms of toxic heavy metals and pollution status.
Relationship Between Financial Toxicity and Surgical Treatment for Early-Stage Breast Cancer: A Propensity Score-Matched Comparison of Breast-Conserving Therapy and Mastectomy
Authors: Boukovalas Stefanos , Liu Jun , Asaad Malke , Schaverien Mark V. , Akay Catherine , Garvey Patrick B. , Hwang Rosa F. , Offodile Anaeze C.
Published: June 2021

BACKGROUND:

Financial toxicity (FT) can lead to decreased quality of life and poor treatment outcomes. However, there is limited published data on the extent to which the various surgical treatment approaches for early-stage breast cancer are determinants for FT.

STUDY DESIGN:

We performed a single-institution cross-sectional survey of adult female patients with stage 0 to II breast cancer undergoing unilateral breast-conserving therapy or unilateral mastectomy. FT was measured using the Comprehensive Score for Financial Toxicity (COST) survey. Propensity matching was performed to optimize comparability of study groups. A multivariate regression model was used to identify factors associated with worsening FT as a robustness check. Our secondary end point was prevalence of coping strategies associated with cost of cancer care.

RESULTS:

Among 294 patients who met inclusion criteria, 203 underwent breast-conserving therapy and 91 received mastectomy. We generated 72 total matched pairs and noted no differences in demographic and socioeconomic characteristics. Of these, 55 pairs had complete COST information, which was comparable on adjusted analysis (26.6 vs 24.7; p = 0.481). High annual income (β = 4.83; p < 0.001) and supplemental insurance (β = 5.37; p < 0.001) were significantly associated with higher COST scores, while change in employment status (β = –4.81; p < 0.001) correlated significantly with lower COST scores. No significant differences were observed in coping strategies.

CONCLUSIONS:

Choice of BCT or mastectomy was not associated with a differential risk for FT in early-stage cancer. Decisions on ablative approach should be made based on patient preferences and disease-specific criteria. Transparent counseling on FT for high-risk populations promotes patient-centricity.
Evaluation of Postoperative Complication with Medically Necessary, Time-Sensitive Scoring System During Acute COVID-19 Pandemic: A Prospective Observational Study
Authors: Dinçer Müşerref Beril , Güler Meltem Merve , Gök Ali Fuat Kaan , İlhan Mehmet , Orhan-Sungur Mukadder , Özkan-Seyhan Tülay , Koltka Ahmet Kemalettin
Published: June 2021

BACKGROUND:

High scores in the Medically Necessary, Time-Sensitive (MeNTS) scoring system, used for elective surgical prioritization during the coronavirus disease 2019 pandemic, are assumed to be associated with worse outcomes. We aimed to evaluate the MeNTS scoring system in patients undergoing elective surgery during restricted capacity of our institution, with or without moderate or severe postoperative complications.

STUDY DESIGN:

In this prospective observational study, MeNTS scores of patients undergoing elective operations during May and June 2020 were calculated. Postoperative complication severity (classified as Group Clavien-Dindo < II or Group Clavien-Dindo ≥ II), as well as Duke Activity Index, American Society of Anesthesiologists (ASA) physical status, presence of smoking, leukocytosis, lymphopenia, elevated C-reactive protein (CRP), operation and anesthesia characteristics, intensive care requirement and duration, length of hospital stay, rehospitalization, and mortality were noted.

RESULTS:

There were 223 patients analyzed. MeNTS score was higher in the Clavien-Dindo ≥ II Group compared with the Clavien-Dindo < II Group (50.98 ± 8.98 vs 44.27 ± 8.90 respectively, p < 0.001). Duke activity status index (DASI) scores were lower, and American Society of Anesthesiologists physical status class, presence of smoking, leukocytosis, lymphopenia, elevated CRP, and intensive care requirement were higher in the Clavien-Dindo ≥ II Group (p < 0.01). Length of hospital stay was longer in the Clavien-Dindo ≥ II Group (15 [range 2–90] vs 4 [1–30] days; p < 0.001). Mortality was observed in 8 patients. Area under the receiver operating characteristic curve of MeNTS and DASI were 0.69 and 0.71, respectively, for predicting moderate/severe complications.

CONCLUSIONS:

Although significant, MeNTS score had low discriminating power in distinguishing patients with moderate/severe complications. Incorporation of a cardiovascular functional capacity measure could improve the scoring system.
An approach to Quillen’s conjecture via centralisers of simple groups
Authors: Piterman Kevin Iván
Published: June 2021

For any given subgroup H of a finite group G, the Quillen poset

${\mathcal {A}}_p(G)$

of nontrivial elementary abelian p-subgroups is obtained from

${\mathcal {A}}_p(H)$

by attaching elements via their centralisers in H. We exploit this idea to study Quillen’s conjecture, which asserts that if

${\mathcal {A}}_p(G)$

is contractible then G has a nontrivial normal p-subgroup. We prove that the original conjecture is equivalent to the

${{\mathbb {Z}}}$

-acyclic version of the conjecture (obtained by replacing ‘contractible’ by ‘

${{\mathbb {Z}}}$

-acyclic’). We also work with the

${\mathbb {Q}}$

-acyclic (strong) version of the conjecture, reducing its study to extensions of direct products of simple groups of p-rank at least

$2$

. This allows us to extend results of Aschbacher and Smith and to establish the strong conjecture for groups of p-rank at most

$4$

.
Armas líticas, técnicas y estrategias de caza de pinnípedos en la desembocadura del Río Santa Cruz, Patagonia Meridional
Authors: Cañete Mastrángelo Daniela S.
Published: June 2021

El objetivo de este trabajo es discutir las técnicas y estrategias de caza empleadas para la captura de pinnípedos en la desembocadura del Río Santa Cruz (Santa Cruz, Patagonia), particularmente en la localidad arqueológica Punta Entrada. Ésta se caracteriza por poseer amplias concentraciones de material arqueológico a cielo abierto en las cuales los restos de pinnípedos de las especies Otaria flavescens y Arctocephalus australis dominan los conjuntos zooarqueológicos, evidenciando que estos animales fueron una presa principal de los cazadores-recolectores durante los últimos 2.000 años aP. Los estudios del registro artefactual lítico sugieren el uso de diversos sistemas de armas combinados, entre los cuales se incluyen aquellos de circulación regional y uso general (lanzas) y otros netamente costeros y de uso específico, como son los rompecráneos, informando así la existencia de estrategias de caza particulares para estos animales y de artefactos destinados a tal fin.
Beyond probiotic legend: ESSAP gut microbiota health score to delineate SARS-COV-2 infection severity
Authors: Hegazy Mona , Ahmed Ashoush Omar , Tharwat Hegazy Mohamed , Wahba Mahmoud , Lithy Rania M. , Abdel-Hamid Hoda M. , Ahmed Abd elshafy Samah , Abdelfatah Dalia , El-Din Ibrahim Maha Hossam , Abdelghani Ahmed
Published: June 2021

COVID-19 pandemic continues to be a global health crisis. The gut microbiome critically affects the immune system, and some respiratory infections are associated with changes in the gut microbiome; here, we evaluated the role of nutritional and lifestyle habits that modulate gut microbiota on COVID-19 outcomes in a longitudinal cohort study that included 200 patients infected with COVID-19. Of these, 122 cases were mild and seventy-eight were moderate, according to WHO classification. After detailed explanation by a consultant in clinical nutrition, participants responded to a written questionnaire on daily sugar, prebiotic intake in food, sleeping hours, exercise duration and antibiotic prescription, during the past 1 year before infection. Daily consumption of prebiotic-containing foods, less sugar, regular exercise, adequate sleep and fewer antibiotic prescriptions led to a milder disease and rapid virus clearance. Additionally, data on these factors were compiled into a single score, the ESSAP score (Exercise, Sugar consumption, Sleeping hours, Antibiotics taken, and Prebiotics consumption; 0–11 points), median ESSAP score was 5 for both mild and moderate cases; however, the range was 4–8 in mild cases, but 1–6 in moderate (P = 0·001, OR: 4·2, 95 % CI 1·9, 9·1); our results showed a negative correlation between regular consumption of yogurt containing probiotics and disease severity (P = 0·007, OR: 1·6, 95 % CI 1·1, 2·1). Mild COVID-19 disease was associated with 10–20 min of daily exercise (P = 0·016), sleeping at least 8 h daily, prescribed antibiotics less than 5 times per year (P = 0·077) and ate plenty of prebiotic-containing food.
The Structural Injustice Turn, the Historical Justice Dilemma and Assigning Responsibility with the Canadian TRC Report
Authors: James Matt
Published: June 2021

This article addresses the historical justice dilemma: although critical memory is indispensable for accountability, efforts to use it are often hampered by the unjust relations and systems that caused the wrongs to which historical justice is compelled to respond in the first place. Contemporary authors tackle this problem by focusing on collective responsibility for structural injustice. This article takes a different tack. Studying closely the 2009–2015 Truth and Reconciliation Commission of Canada (TRC) report, it argues that the structural turn may come at the expense of a focus on agency and may thus provide unwitting anonymity for wrongdoers while crimping our thinking about leadership and responsibility. Although this article strongly criticizes the TRC report, it tries to work constructively with it, developing an analysis that compensates for the report's unwitting invisibilization of perpetrators. Distilling portraits and analyses of wrongdoer agency that are latent in the TRC's postwar history volume, this article shows how we can develop the report as a resource of what I call retributive social accountability.
What Moooves Opinion? Examining the Correlates and Dynamics of Mass Support for Supply Management in the Agriculture Sector
Authors: Rivard Alex B. , Merkley Eric
Published: June 2021

Supply management is a long-standing agricultural policy in Canada that applies to dairy, poultry and eggs. To date, there exists no academic research on the correlates or dynamics of public support for supply management. We use data collected from the Digital Democracy Project's study of the 2019 Canadian election, including results from a between-subjects framing experiment, to show that support for supply management is most opposed by economic conservatives. However, we find support to be highly malleable by framing: it increases when respondents are primed to think of the policy as a way of protecting farmers and decreases when they are primed to think of its costs to consumers. Contrary to expectations, framing effects are not stronger when messages are ideologically congenial or among those with high levels of policy knowledge. If anything, effects are stronger among those with lower levels of knowledge.
A NEGLECTED MANUSCRIPT OF THE GLOSSARY OF PLACIDUS AND THE HISTORY OF THE TEXT
Authors: Welsh Jarrett T. , Hill Jesse
Published: June 2021

This paper identifies a neglected manuscript, Viterbo, Centro Diocesano di Documentazione (CeDiDo), Capitolare 51 (R), as the extant archetype of the Libri Romani version of the glossary of Placidus. It first demonstrates that R is the parent of the three witnesses to the Libri Romani text used by editors, and it considers the implications of the neglected manuscript for future editions of the text. It then corroborates the importance of R by tracing its travels in humanistic and antiquarian circles in Italy in the fifteenth and sixteenth centuries. This history provides a framework for future research on the textual transmission of the Libri Romani text of Placidus.
Media influence on public policy in Kenya
Authors: Irwin David , Kiereini Njeri
Published: June 2021

Many scholars argue that the media can influence policymakers – determining the policy agenda, framing issues, prioritising issues and, on occasion, setting the policy as well. It could be, however, that skilled policymakers exploit the media, so that the media in fact reflects the issues that policymakers want debated. This then poses an important question of whether the media does indeed influence the public policy process. The topic of media influence is widely studied in consolidated democracies but there has been limited research in consolidating democracies. This paper addresses both of these gaps – through exploring the extent to which the media influences policymakers in Kenya, a country perceived to have a moderately free press and one in which a range of interest groups vie to influence government and thus with a media likely to carry a range of competing opinions.
Recycled rhetoric: examining continuities in political rhetoric as a resilience strategy in pre-independence and post-genocide Rwanda
Authors: Laws Meghan C.
Published: June 2021

Seen as one of Africa's most visionary and enlightened autocrats, Paul Kagame's presidency is often contrasted with the violence and ethnocentrism of his discredited predecessors. Drawing on rarely analysed primary sources, this article disputes this simplified narrative by revealing striking continuities in the ruling elite's rhetorical repertoire in the late colonial period (1956–1959) and present-day Rwanda. Both then and now, rhetorical calls to remove ethnic labels from public discourse in the name of national unity are key resilience strategies designed to shape regime relations with domestic and international audiences in ways that reinforce power concentration by a small (largely Tutsi) elite. Changes in the distribution of power and the scale of anti-Tutsi violence (most notably in 1994) help explain why a similar rhetorical strategy failed to prevent the dismantling of the Tutsi oligarchy in 1961 while strengthening its contemporary counterpart.
Influence of Stand Age And Structure on the Epiphytic Lichen Vegetation
in the Middle-Boreal Forests of Finland
Authors: Hyvärinen M. , Halonen P. , Kauppi M.
Published: June 2021

The epiphytic lichen vegetation on the trunks of Pinus
sylvestris and Picea abies was studied and analysed by
canonical correspondence analysis in relation to a number of environmental
variables. The distribution and abundance of epiphytic lichen species proved
to be dependent on the age of the stand, showing divergent responses in
relation to phorophyte species and environmental variables such as acidity
of the bark and vertical location on the trunk. The importance of stand age
in the pattern of community variation is concluded to be an outcome of
interaction between changes in the structure of the tree canopy,
microclimate and properties of the bark. The responses of single lichen
species to changes in the environment seem to vary considerably, indicating
differences in competitive ability and ecological strategy between the
species.
Social Democratic Party Exceptionalism and Transnational Policy Linkages
Authors: Schleiter Petra , Böhmelt Tobias , Ezrow Lawrence , Lehrer Roni
Published: June 2021

Political parties learn from foreign incumbents, that is, parties abroad that won office. But does the scope of this cross-national policy diffusion vary with the party family that generates those incumbents? The authors argue that party family conditions transnational policy learning when it makes information on the positions of sister parties more readily available and relevant. Both conditions apply to social democratic parties. Unlike other party families, social democrats have faced major competitive challenges since the 1970s and they exhibit exceptionally strong transnational organizations—factors, the authors contend, that uniquely facilitate cross-national policy learning from successful parties within the family. The authors analyze parties’ policy positions using spatial methods and find that social democratic parties are indeed exceptional because they emulate one another across borders more than do Christian democratic and conservative parties. These findings have important implications for our understanding of political representation and of social democratic parties’ election strategies over the past forty years.
Task-based torque minimization of a 3-PṞR spherical parallel manipulator
Authors: Zarkandi Soheil
Published: June 2021

A comprehensive dynamic modeling and actuator torque minimization of a new symmetrical three-degree-of-freedom (3-DOF) 3-PṞR spherical parallel manipulator (SPM) is presented. Three actuating systems, each of which composed of an electromotor, a gearbox and a double Rzeppa-type driveshaft, produce input torques of the manipulator. Kinematics of the 3-PṞR SPM was recently studied by the author (Zarkandi, Proc. Inst. Mech. Eng. Part C J. Mech. Eng. Sci. 2020, https://doi.org/10.1177%2F0954406220938806). In this paper, a closed-form dynamic equation of the manipulator is derived with the Newton–Euler approach. Then, an optimization problem with kinematic and dynamic constraints is presented to minimize torques of the actuators for implementing a given task. The results are also verified by the SimMechanics model of the manipulator.
Stages of Acquisition and the P/E Model of Working Memory: Complementary or contrasting approaches to foreign language aptitude?
Authors: Wen Zhisheng (Edward) , Skehan Peter
Published: June 2021

This paper explores the roles of both working memory (WM) and more traditional aptitude components, such as input processing and language analytic ability in the context of foreign language learning aptitude. More specifically, the paper compares two current perspectives on language aptitude: the Stages Approach (Skehan, 2016, 2019) and the P/E Model (Wen, 2016, 2019). Input processing and noticing, pattern identification and complexification, and feedback are examined as they relate to both perspectives and are then used to discuss existing aptitude testing, recent research, and broader theoretical issues. It is argued that WM and language aptitude play different but complementary roles at each of these stages, reflecting the various linguistic and psycholinguistic processes that are most prominent in other aspects of language learning. Overall, though both perspectives posit that WM and language aptitude have equal importance at the input processing stage, they exert greater influence at each of the remaining stages. More traditional views of aptitude dominate at the pattern identification and complexification stage and WM with the feedback stage.
Rendering Inuit cancer “visible”: Geography, pathology, and nosology in Arctic cancer research
Authors: Fraser Jennifer
Published: June 2021

Argument

In August of 1977, Australian pathologist David W. Buntine delivered a presentation at the Annual Meeting of the Royal College of Pathologists of Australia in Melbourne, Victoria. In this presentation, he used the diagnostic category of “Eskimoma,” to describe a unique set of salivary gland tumors he had observed over the past five years within Winnipeg’s Health Sciences Center. Only found amongst Inuit patients, these tumors were said to have unique histological, clinical, and epidemiological features and were unlike any other disease category that had ever been encountered before. To understand where this nosological category came from, and its long-term impact, this paper traces the historical trajectory of the “Eskimoma.” In addition to discussing the methods and infrastructures that were essential to making the idea of Inuit cancer “visible,” to the pathologist, the epidemiologist, and to society at large, this paper discusses how Inuit tissue samples obtained, stored, and analyzed in Winnipeg, Manitoba, came to be codified into a new, racially based disease category – one that has guided Canadian and international understandings of circumpolar cancer trends and shaped northern healthcare service delivery for the past sixty years.