bluuebunny/crossref_metadata_2025 huggingface dataset:
Classification of loneliness using the T‐ILS: Is it as simple as it seems?
Authors: Nielsen Tine , Friderichsen Ida S. , Rayce Signe Boe
Published: December 2020

Student well‐being is a growing issue in higher education, and assessment of the prevalence of conditions as loneliness is therefore important. In higher education and population surveys the Three‐Item Loneliness Scale (T‐ILS) is used increasingly. The T‐ILS is attractive for large multi‐subject surveys, as it consists of only three items (derived from the UCLA Loneliness Scale). Several ways of classifying persons as lonely based on T‐ILS scores exist: dichotomous and trichotomous classification schemes and use of sum scores with rising levels indicating more loneliness. The question remains whether T‐ILS scores are comparable across the different population groups where they are used or across groups of students in the higher education system. The aim was to investigate whether the T‐ILS suffers from differential item functioning (DIF) that might change the loneliness classification among higher education students, using a large sample just admitted to 22 different academy profession degree programs in Denmark (N = 3,757). DIF was tested relative to degree program, age groups and gender. The framework of graphical loglinear Rasch models was applied, as this allows for adjustment of sum scores for uniform DIF, and thus for assessment of whether DIF might change the classification. Two items showed DIF relative to degree program and gender, and adjusting for this DIF changed the classification for some subgroups. The consequences were negligible when using a dichotomous classification and larger when using a trichotomous classification. Therefore, trichotomous classification should be used with caution unless suitable adjustments for DIF are done prior to classification.
Psychometric validation of PROM instruments
Authors: Christensen Karl B. , Comins Jonathan D. , Krogsgaard Michael R. , Brodersen John , Jensen Jonas , Hansen Christian Fugl , Kreiner Svend
Published: December 2020

The aim was to provide an overview of the different statistical methods for validation of patient‐reported outcome measures, ranging from simple statistical methods available in all software packages to advanced statistical models that require specialized software. A non‐technical summary of classical test theory (CTT) and modern test theory (MTT) is provided. Specifically, confirmatory factor analysis, item response theory, and Rasch analysis is outlined. One CTT and three MTT methods were used to validate the two subscales (Symptoms and Quality of Life) from the Knee Injury and Osteoarthritis Outcome Score (KOOS). For each methodology, two analyses were considered: (i) a unidimensional analysis ignoring the pre‐specified dimensionality, and (ii) a two‐dimensional analysis using the pre‐specified dimensionality. While CTT did not adequately address central issues regarding the validity of the KOOS subscales, the three MTT methods yielded very similar results. In conclusion, MTT methods offer analysis of all relevant properties related to the validity of patient‐reported outcome measures, while this is not the case for CTT. Claims about sufficient validity based on CTT methods are inadequate and should not be trusted.
A Springboard for physicians returning to practice
Authors: Mullender Claire , Gowland Emily , Ford Charlotte , Moore Anna , Fisk Marie , Bryant Catherine , Le Ball Karen , Deaner Andrew , Birns Jonathan
Published: December 2020

Background

Many physicians take time out of training and have decreased confidence and poor performance ratings on their return. Courses employing multiple educational methods have been shown to be effective in easing learners into new clinical roles during transition periods but, to date, there is limited evidence for courses to support trainees returning to practice (RTP).

Methods

A 2‐day course, named Springboard, was developed, specifically to address the needs of trainee physicians RTP. It employed a blended, multi‐modal approach to learning, including lectures, workshops, case‐based sessions, interactive panel discussions, small group teaching, peer‐led practical advice sessions and simulation training. Springboard was delivered eight times between 2014 and 2019 with a total of 540 doctors attending. We analysed participant pre‐and post‐course questionnaire feedback.

Results

Reasons for doctors taking time out of training included parental leave, research, fellowships in education and leadership, health‐related absence and career breaks. Time out of training ranged between 3 months and 6 years. A significant pre/post‐course increase in candidates’ self‐reported leadership skills and confidence in being prepared to return to practice was demonstrated alongside an appreciation of a multi‐modal, ‘boot camp’ course delivered by expert faculty and a networking experience.

Discussion

Dedicated training courses tailored to the needs of physicians RTP provide an opportunity for improving confidence relating to many areas of clinical and non‐clinical practice as well as providing an environment for networking and sharing experiences. Further work would be valuable to establish the potential of providing this on a larger scale.
Development of a method for flood detection based on Sentinel‐1 images and classifier algorithms
Authors: Sharifi Alireza
Published: December 2020

Floods are one of the most devastating natural disasters in the world, displacing millions of people each year and causing severe damage to people's lives and infrastructure. It is the most widespread hydrological hazard worldwide that affects water management, nature protection, economic activities, hydromorphological alterations on ecosystem services and human health. Real‐time monitoring systems play a key role in flood risk reduction and disaster response decisions. Studies have shown that using earth observation data for flood monitoring and timely actions based on good quality information reduces damages. In this paper, after thresholding, a machine learning algorithm and an object‐based classification method were used to classify the SAR data. Thresholding helps detect regions in the flooded areas. A comparison of the results showed that the machine learning algorithm obtained significant results. Because of the results obtained, the usefulness of Sentinel‐1 images as a baseline data for the improvement of the methodological guide is appreciated and should be used as a new source to monitor the flood risks.
OPTIMIZATION OF REFLUX EXTRACTION FOR CAESALPINIA SAPPAN LINN. WOOD BY USING RESPONSE SURFACE METHODOLOGY
Authors: Mohd Ariff Mohd Azahar , Abd Jalil Muhammad Syafiq , Abdul Razak Noor ‘Aina , Jaapar Jefri
Published: December 2020

Caesalpinia sappan linn. (CSL) is a plant which is also known as Sepang tree contains various medicinal values such as to treat diarrhea, skin rashes, syphilis, jaundice, drinking water for blood purifying, diabetes, and to improve skin complexion. The aim of this study is to obtain the most optimum condition in terms of the ratio of sample to solvent, particle size, and extraction time to get the highest amount of concentration of the CSL extract. In this study, the ranges of each parameters used were: ratio sample to solvent: 1.0:20, 1.5:20, 2.0:20, 2.5:20, 3.0:20, particle size: 1 mm, 500 um, 250 um, 125 um, 63 um, and extraction time: 1 hr, 2 hr, 3 hr, 4 hr, 5 hr. The concentration was analyzed using a UV-vis spectrophotometer. The optimum conditions were obtained by response surface methodology. From the design, 20 samples were run throughout this experiment. The optimized value from the RSM were 2.0:20 for ratio sample to solvent, 125 µm of particle size and 2.48 hours with the concentration of 37.1184 ppm. The accuracy of the predictive model was validated with 2 repeated runs and the mean percentage error was less than 3%. This confirmed the model’s capability for optimizing the conditions for the reflux extraction of CSL’s wood.
Role of the Ipsilateral Primary Motor Cortex in the Visuo-Motor Network During Fine Contractions and Accurate Performance
Authors: Porcaro Camillo , Mayhew Stephen D. , Bagshaw Andrew P.
Published: December 2020

It is widely recognized that continuous sensory feedback plays a crucial role in accurate motor control in everyday life. Feedback information is used to adapt force output and to correct errors. While primary motor cortex contralateral to the movement (cM1) plays a dominant role in this control, converging evidence supports the idea that ipsilateral primary motor cortex (iM1) also directly contributes to hand and finger movements. Similarly, when visual feedback is available, primary visual cortex (V1) and its interactions with the motor network also become important for accurate motor performance. To elucidate this issue, we performed and integrated behavioral and electroencephalography (EEG) measurements during isometric compression of a compliant rubber bulb, at 10% and 30% of maximum voluntary contraction, both with and without visual feedback. We used a semi-blind approach (functional source separation (FSS)) to identify separate functional sources of mu-frequency (8–13[Formula: see text]Hz) EEG responses in cM1, iM1 and V1. Here for the first time, we have used orthogonal FSS to extract multiple sources, by using the same functional constraint, providing the ability to extract different sources that oscillate in the same frequency range but that have different topographic distributions. We analyzed the single-trial timecourses of mu power event-related desynchronization (ERD) in these sources and linked them with force measurements to understand which aspects are most important for good task performance. Whilst the amplitude of mu power was not related to contraction force in any of the sources, it was able to provide information on performance quality. We observed stronger ERDs in both contralateral and ipsilateral motor sources during trials where contraction force was most consistently maintained. This effect was most prominent in the ipsilateral source, suggesting the importance of iM1 to accurate performance. This ERD effect was sustained throughout the duration of visual feedback trials, but only present at the start of no feedback trials, consistent with more variable performance in the absence of feedback. Overall, we found that the behavior of the ERD in iM1 was the most informative aspect concerning the accuracy of the contraction performance, and the ability to maintain a steady level of contraction. This new approach of using FSS to extract multiple orthogonal sources provides the ability to investigate both contralateral and ipsilateral nodes of the motor network without the need for additional information (e.g. electromyography). The enhanced signal-to-noise ratio provided by FSS opens the possibility of extracting complex EEG features on an individual trial basis, which is crucial for a more nuanced understanding of fine motor performance, as well as for applications in brain-computer interfacing.
Free Vibrations of Steel–Concrete Composite Beams by the Dynamic Direct Stiffness Method
Authors: Sun Qikai , Zhang Nan , Liu Xiao , Tao Xiaoyan
Published: December 2020

A new dynamic direct stiffness method for analyzing the natural vibration characteristics of steel–concrete composite beams (SCCBs) is proposed, which considers the effect of partial interaction between the interface of the concrete slab and steel beam. The advantage of the method is that exact solutions can be obtained due to no introduction of approximated displacement and/or force fields in the derivation. Besides, the method is especially useful for the dynamic analysis of SCCBs with axial variable stiffness under four common boundary conditions. The proposed method is validated by comparing with the theoretical and experimental results available in the literature. Finally, the effects of different boundary conditions, shear connection, cross-sectional stiffness ratio, and other parameters upon the frequencies of the beam are discussed in detail.
A machine learning approach to optimal Tikhonov regularization I: Affine manifolds
Authors: De Vito Ernesto , Fornasier Massimo , Naumova Valeriya
Published: December 2020

Despite a variety of available techniques, such as discrepancy principle, generalized cross validation, and balancing principle, the issue of the proper regularization parameter choice for inverse problems still remains one of the relevant challenges in the field. The main difficulty lies in constructing an efficient rule, allowing to compute the parameter from given noisy data without relying either on any a priori knowledge of the solution, noise level or on the manual input. In this paper, we propose a novel method based on a statistical learning theory framework to approximate the high-dimensional function, which maps noisy data to the optimal Tikhonov regularization parameter. After an offline phase where we observe samples of the noisy data-to-optimal parameter mapping, an estimate of the optimal regularization parameter is computed directly from noisy data. Our assumptions are that ground truth solutions of the inverse problem are statistically distributed in a concentrated manner on (lower-dimensional) linear subspaces and the noise is sub-gaussian. We show that for our method to be efficient, the number of previously observed samples of the noisy data-to-optimal parameter mapping needs to scale at most linearly with the dimension of the solution subspace. We provide explicit error bounds on the approximation accuracy from noisy data of unobserved optimal regularization parameters and ground truth solutions. Even though the results are more of theoretical nature, we present a recipe for the practical implementation of the approach. We conclude with presenting numerical experiments verifying our theoretical results and illustrating the superiority of our method with respect to several state-of-the-art approaches in terms of accuracy or computational time for solving inverse problems of various types.
ReHiC: Enhancing Hi-C data resolution via residual convolutional network
Authors: Cheng Zhe , Liu Lin , Lin Guoliang , Yi Chao , Chu Xing , Liang Yu , Zhou Wei , Jin Xin
Published: December 2020

High-throughput chromosome conformation capture (Hi-C) is one of the most popular methods for studying the three-dimensional organization of genomes. However, Hi-C protocols can be expensive since they require large amounts of sample material and may be time-consuming. Most commonly used Hi-C data are low-resolution. Such data can only be used to identify large-scale genomic interactions and are not sufficient to identify the small-scale patterns. We propose a novel deep learning-based computational approach (named ReHiC) that enhances the resolution of Hi-C data and allows us to achieve high-resolution Hi-C data at a relatively low cost. Our model only requires 1/16 down-sampling ratio of the original sequence reading to predict higher resolution Hi-C data. This is very close to high-resolution data in terms of numerical distribution and interaction distribution. More importantly, our framework stacks deeper and converges faster due to residual blocks in the core of the network. Extensive experiments show that ReHiC performs better than HiCPlus and HiCNN, two recently developed and frequently used methods to look at the spatial organization of chromatin structure in the cell. Moreover, the portability of our framework verified by extensive experiments shows that the trained model can also enhance the Hi-C matrix of other cell types efficiently. In conclusion, ReHiC offers more accurate high-resolution image reconstruction in a broad field.
Role of Cultural Diversity in Innovative Performance of International Business Collaborations
Authors: Moharrer M. , Corso M.
Published: December 2020

International business (IB) collaborations can create a difference in the performance of the firms. Some previous studies had doubt if this superior performance is due to the internationalization itself or is related to the characteristics of one of the partners. However, here it is argued that difference in performance can be due to the characteristics of dyad between the partners, i.e. cultural distance. We tested the role of cultural distance (cultural diversity) between partners, while considering a network of countries. Social network analysis (SNA) is applied by utilizing UCINET software. This study built a database of around six hundred thousand patents data from The United States Patent and Trademark Office, and analyzed innovations resulting from cross-cultural collaborations. The result illustrates that increase in cultural distance decreases the number (quantity) of innovations, but has an inverted U-shape relationship with the quality of innovations. Researches which studied the relationship between cultural diversity and innovation in IB, mainly either conclude diversity hinders innovation or promotes it. This study fills this gap by analyzing two important dimensions of innovation i.e. quantity and quality of innovation.
Dilaton black holes with logarithmic source in gravity’s rainbow
Authors: Dehghani M.
Published: December 2020

Starting from the suitable action of four-dimensional Einstein gravity, which is coupled to a scalar dilaton field and logarithmic nonlinear electrodynamics, the related field equations have been solved in a spherically symmetric and energy-dependent spacetime. It has been found that the scalar potential, as the exact solution of the scalar field equations, must be written as the linear combination of two Liouville-type potentials. Three families of novel exact black holes have been introduced as the exact solutions to the gravitational equations, which are asymptotically non-flat and non-AdS. It has been illustrated that our solutions, recover their corresponding quantities in the Einstein–Maxwell-dilaton gravity theory when the nonlinearity parameter of electrodynamics is chosen very large. The thermodynamic and conserved quantities of the black holes have been calculated under the influence of the rainbow function. Then, through calculation of the Smarr mass formula, we have shown that the first law of black hole thermodynamics remain valid for all of the new dilatonic black holes. Thermal stability or phase transition of the black holes have been investigated by use of the canonical ensemble and thermodynamic geometry approaches, separately. By comparison of the results of these two alternative approaches, it has been found that they lead to the same results provided that the thermodynamic metric of HPEM is used.
Transit cosmological models in modified f(Q,T) gravity
Authors: Zia Rashid , Maurya Dinesh Chandra , Shukla Anil Kumar
Published: December 2020

[Formula: see text] gravity is a recently proposed modified theory of gravity due to Xu et al. ([Formula: see text]). It is an extension of the symmetric teleparallel gravity, in which the gravitational action is given by an arbitrary function [Formula: see text] of the non-metricity tensor [Formula: see text] and the trace of energy-momentum tensor [Formula: see text]. In this paper also, we have investigated the cosmological model with Friedmann–Lemaitre–Robertson–walker (FLRW) Universe in [Formula: see text] theory with [Formula: see text]. Applying the energy conservation condition [Formula: see text], we have obtained the various cosmological parameters viz. Hubble parameter [Formula: see text], deceleration parameter [Formula: see text], etc. in terms of redshift [Formula: see text]. Using the available observational Hubble datasets [Formula: see text], the best fit values of the model parameters are determined by the [Formula: see text]-test formula. For these obtained values of model parameters, our model represents a transit cosmological model with past decelerating to present accelerating expansion phase of the Universe with the present value [Formula: see text]. The point of signature-flipping (transition) is calculated as [Formula: see text]. We have analyzed the variations of physical parameters viz. matter energy density [Formula: see text], isotropic pressure [Formula: see text], equation of state [Formula: see text] with respect to redshift [Formula: see text] and coupling parameter [Formula: see text]. For checking the viability of our derived model, we have tested energy conditions and also performed statefinder diagnosis. The age of the Universe is also calculated.
The biostimulative effectiveness of photobiomodulation therapy application on thawed dental pulp stem cells
Authors: Özverel Cenk Serhan , İslam Aylin , Yılmaz Hasan Güney
Published: December 2020

This study was conducted to understand the cellular proliferative effect of Photobiomodulation Therapy (PBMT) on thawed dental pulp stem cells (DPSCs) stored for 2 years. For this purpose, cells were exposed to PBMT for short period of time to evaluate the most appropriate PBMT parameter for stimulating cellular proliferation that can be used for future tissue engineering therapies. Fully characterized DPSCs were seperated into three groups according to the laser energy densities (5[Formula: see text]J/cm2 or 7[Formula: see text]J/cm2) applied and a group was served as control in which cells did not receive any laser irradiation. The cells in laser-irradiated groups were further divided into two subgroups according to the period of application (24[Formula: see text]h and 0[Formula: see text]h) and exposed to Gallium–Aluminum–Arsenide diode laser irradiation. Cell viability and the proliferation rate of the cells were analyzed with the 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide (MTT) assay, any PBMT related cellular cytotoxicity were determined by performing a lactate dehydrogenase assay (LDH) and statistical analysis of data were performed. The percentage of proliferation seemed to increase upon laser therapy in both different doses of irradiation (5[Formula: see text]J/cm2 and 7[Formula: see text]J/cm2). DPSCs showed significantly higher proliferation rate upon 7[Formula: see text]J/cm2 irradiation in both 0[Formula: see text]h and 24[Formula: see text]h when compared to control groups. However, DPSCs irradiated with 5[Formula: see text]J/cm2 dose induced relatively lower proliferation rate when compared to 7[Formula: see text]J/cm2 dose of irradiation. According to the LDH data, PBMT exposure did not show any significant cytotoxicity at both energy densities in all different time periods. PBMT at 7[Formula: see text]J/cm2 should be an effective parameter to stimulate proliferation of long-term cryopreserved DPSCs in a short term time period. Photobiomodulation therapy may be an upcoming tool for future tissue enngineering and regenerative dentistry applications.
Enhanced PMS activation property of Cu decorated MnO catalyst for antibiotic degradation
Authors: Cao Yang
Published: December 2020

Designing highly efficient catalysts for PMS activation is of great significance for the degradation of organic pollutants. Here, a Cu decorated MnO catalyst (Cu-MnO) has been synthesized for forceful PMS activation to drive antibiotic degradation. As expected, the Cu-MnO particles exhibit superior catalytic activity for tetracycline (TC) degradation with the high degradation rate of 91% after 60 min due to the synergetic redox coupling of Mn and Cu species. In addition, the experimental parameters (catalyst concentration, PMS dosage, initial pH value, initial TC concentration, and reaction temperature) were also explored to optimize the reaction conditions and improve the efficiency of TC degradation. At the same time, the most likely reaction path of TC degradation was speculated based on quenching experiment. This work provides a new idea for efficient activation of PMS.
Extremal phenylene chains with respect to the Mostar index
Authors: Chen Hanlin , Liu Hechao , Xiao Qiqi , Zhang Jinlian
Published: December 2020

For a connected graph [Formula: see text], the Mostar index is defined as [Formula: see text], where [Formula: see text] (respectively, [Formula: see text]) is the number of vertices of [Formula: see text] closer to [Formula: see text] (respectively, [Formula: see text]) than [Formula: see text] (respectively, [Formula: see text]). In this paper, we determine the first five maximal (respectively, the first five minimal) values of the Mostar index among all phenylene chains with [Formula: see text] hexagons, the corresponding extremal chains are completely characterized, respectively.
High generalization performance structured self-attention model for knapsack problem
Authors: Ding Man , Han Congying , Guo Tiande
Published: December 2020

The end-to-end learning approaches possess the advantages of high efficiency, rapidity and superior solving precision for combinatorial optimization problems, while exploring generalization to instances different from training scale is an open question. In this paper, we focus on the knapsack problem (KP) and employ an end-to-end data-driven approach based on attention model incorporated with different forms of baseline of policy gradient algorithm to solve KP. We first investigate the generalization performance of the proposed approach for KP on various problem scales with different capacities. The experimental results show that the end-to-end model possesses certain learning and generalization abilities to discover the intrinsic characteristics between instances, then guides to solve other instances of different scales.
Marchenko–Pastur law with relaxed independence conditions
Authors: Bryson Jennifer , Vershynin Roman , Zhao Hongkai
Published: December 2020

We prove the Marchenko–Pastur law for the eigenvalues of [Formula: see text] sample covariance matrices in two new situations where the data does not have independent coordinates. In the first scenario — the block-independent model — the [Formula: see text] coordinates of the data are partitioned into blocks in such a way that the entries in different blocks are independent, but the entries from the same block may be dependent. In the second scenario — the random tensor model — the data is the homogeneous random tensor of order [Formula: see text], i.e. the coordinates of the data are all [Formula: see text] different products of [Formula: see text] variables chosen from a set of [Formula: see text] independent random variables. We show that Marchenko–Pastur law holds for the block-independent model as long as the size of the largest block is [Formula: see text], and for the random tensor model as long as [Formula: see text]. Our main technical tools are new concentration inequalities for quadratic forms in random variables with block-independent coordinates, and for random tensors.
Metallic Ferromagnetic Property of Mn-Doped BP Semiconductors
Authors: Boutaleb M. , Tadjer A.
Published: December 2020

The doping of boron phosphide (BP) with manganese as magnetic impurity at different concentrations provides metallic ferromagnetic materials B[Formula: see text]MnxP at ([Formula: see text], 0.125, 0.0625). Their structural and electronic properties are calculated by the first-principle spin-density functional theory (DFT) within the framework of the Wu–Cohen generalized gradient approximation (WC-GGA). The DMSs BP originated from doping manganese contributed in SP3 hybridization of tetrahedral crystal field caused by the surrounding of four phosphorus anions. These compounds are not half-metallic but exhibit a poorly metallic ferromagnetic nature, the cause is due to the highly covalent chemical bond of BP. The B[Formula: see text]MnxP are metallic ferromagnetic materials and are not to be intended for spintronic industry.
A Biomechanical Comparison of Locked Unicortical with Non-Locking Bicortical Screws for Metacarpal Shaft Fractures in a Randomized Human Cadaveric Model
Authors: Minogue Febe , Reilly Keryn , Walker Cameron , Malak Sharif , Mayo Andrew , Heiss-Dunlop Wolfgang
Published: December 2020

Background: Locking plate fixation is widely used in large long bone fixation and is now available for small “long” bones in the hand. Potential advantages of unicortical locked fixation are reduced risk of over-drilling and therefore reduced risk of damage to surrounding structures and reduced risk of irritation from proud screws. Furthermore, unicortical fixation may be used where bicortical fixation is technically impossible. Our aim was to compare fixation strength of unicortical locked plate fixation with bicortical non-locked fixation in a human cadaveric model, by assessing strength under cyclical loading conditions and load to failure (LTF).

Methods: 16 matched pairs of embalmed and refrigerated human cadaveric metacarpals were randomly allocated to either unicortical locked or bicortical non-locked plate and screw fixation. A transverse osteotomy was made. Fractures were stabilized with 2.0 mm self-tapping locking or cortical screws. Each metacarpal was then loaded with a 3-point cantilever testing using a 100 N cell on an Instron materials testing device, cyclically loading them at 1,000 repetitions of 30 N and 50 N. If there was no visible failure of the fixation from cyclical loading they were then loaded to failure with a 1 kN cell.

Results: There was a significant difference of average LTF between the bicortical non-locking and unicortical locking of 38.07–59.95 N (p < 0.01). However, both groups showed no statistically significant difference when comparing their performance under cyclical loading.

Conclusions: The authors regard unicortical locked fixation as a useful adjunct to standard plating technique.
Treatment of Proximal Ulnar Stump after Darrach or Sauvé-Kapandji Procedure by Transfer of Insertion-Released Pronator Quadratus Pedicle
Authors: Sakamoto Kazuaki
Published: December 2020

Background: Treatment of the proximal ulnar stump with the Darrach or Sauvé-Kapandji (SK) procedure remains controversial. Ulnar wrist symptoms can result, and although many surgeons attribute these to ulnar stump instability, they can also be caused by radioulnar convergence or stump irritation. We present a novel surgical method for protecting the proximal ulnar stump and avoiding these complications.

Methods: Our cases were five men and five women (mean age 72.0 years, range, 34–89). Mean follow-up duration was 41.7 months (range, 6–101 months). Radiological findings were osteoarthritis in five, rheumatoid arthritis of distal radioulnar joint in three, and ulnocarpal abutment syndrome in two. Pronator quadratus (PQ) was released from its insertion on the radius and transferred dorsally to cover the proximal ulnar stump. Postoperative ulnar wrist symptoms such as ulnar stump tenderness, forearm range of motion, and grip strength were compared with contralateral values. Dynamic radioulnar impingement was evaluated by Lee and Scheker’s stress roentgenogram. Nine patients completed the Patient Rated Wrist Evaluation (PRWE) at final follow-up.

Results: No patients reported ulnar wrist pain or tenderness at the proximal ulnar stump. Postoperative forearm range of motion recovered almost to contralateral values in cases without preoperative forearm contracture. In the two cases with contracture, postoperative pronation and supination recovered to more than their preoperative range. Grip strength averaged 86.4% (range, 66.7–103%) of the contralateral value at final follow-up. Lees and Scheker’s stress roentgenogram revealed marked radioulnar impingement in one case, mild impingement in four cases and none in five, yet no patient complained of pain during the maneuver. The mean PRWE score was 34.7 points (range, 0–52.5 points).

Conclusions: Insertion-released PQ pedicle transfer is an effective treatment option for the proximal ulnar stump after the Darrach or SK procedure.
CT Based Characterization of Volar Surface of Distal Radius: Can an Ideal Volar Plate for Fixation of Distal Radial Fractures be Designed?
Authors: Kumar Arvind , Passey Jigyasa , Chouhan Dushyant , Saini Manish , Narang Amit
Published: December 2020

Background: Literature has limited evidence concerning the morphology of volar surface of distal radius. A mismatch between the plate-contour and contour of the actual volar bony surface can result in malreduction. The purpose of this study is to analyze the normal curvature morphology of volar surface of distal radius and related parameters that can help in designing of the volar plates for fixation of distal radial fractures.

Methods: We retrospectively analyzed CT scans of uninjured healthy distal radii performed during a one year period (2018–2019). The mediolateral extent of the pronator quadratus line, the mediolateral curve of the pronator quadratus line, the mediolateral surface angle between intermediate column and radial column of distal radius, the curvatures and locations of their vertices for radial and intermediate columns were measured.

Results: A total of 84 CT-based studies were analyzed. The mediolateral extent of the pronator quadratus line, the mediolateral curve of the pronator quadratus line, and the mediolateral surface angle between intermediate column and radial column of the distal radius were 24.27 mm, 144.8 degrees and 163.1 degrees, respectively. The mean volar curvatures of the radial and intermediate columns were 156.5 and 151.4 degrees, respectively and distances of their vertices from the pronator-quadratus line were 10.96 mm and 14.13 mm, respectively.

Conclusions: Considerable variations occur in curvature morphology of distal radial volar surface. A best fit rather than an anatomical fit can be considered during implant selection owing to these variations. Besides volar curvature of radial and ulnar columns, location of their vertices, mediolateral angulation and surface curvature between these columns at the level of watershed line should also be considered in plate selection. A combination of a few serial increments of the described parameters in the designs of volar fixation plates would be helpful for surgeons in the best implant selection.
Desafios colocados pelas estratégias neoliberais de precarização do trabalho para a pesquisa-intervenção voltada para a transformação das situações de trabalho
Authors: Muniz Hélder Pordeus , Teixeira Emerson Moraes , Silva Cláudia Osório da
Published: December 2020

Este artigo apresenta os referenciais teóricos e metodológicos que dão suporte a nossos trabalhos e combates acadêmicos em face das estratégias neoliberais, sendo aqueles articulados a uma reflexão sobre pesquisa e intervenção em psicologia do trabalho. As políticas neoliberais adotadas na atualidade têm gerado efeitos importantes de precarização da vida e em especial nos meios de trabalho, resultando em alguns efeitos subjetivos perversos que se apresentam como desafios a serem enfrentados pelos trabalhadores na contínua invenção de sua vida e proteção de sua saúde. Discutimos como as ferramentas das clínicas do trabalho auxiliam a transformação das situações de vida e trabalho por meio da ampliação do poder de agir dos trabalhadores. Propomos, por fim, seguir nos debates do campo da psicologia do trabalho e organizacional no Brasil – sobre essas estratégias que visam transformar, e não apenas conhecer.
Neoliberalismo e horizontes da precarização do trabalho
Authors: Araújo José Newton Garcia de
Published: December 2020

Este texto discute, inicialmente, a precarização do trabalho no atual cenário do neoliberalismo. Baseado em pesquisa bibliográfica e documental, apresenta as bases teóricas e metodológicas da clássica psicossociologia francesa e seu desdobramento como psicossociologia do trabalho. Em seguida, buscamos ressituar esta disciplina nos campos do trabalho e da política, em uma articulação com os conceitos de precariado e de necropolítica. Evoca-se aqui a perda dos direitos trabalhistas e de cidadania, que desemboca na crescente desigualdade social e no “direito de morte” do Estado sobre as camadas mais pauperizadas da população. O texto interroga também as possibilidades da assistência pública à saúde dos trabalhadores, especialmente aqueles submetidos ao trabalho por aplicativos. A respeito dessa atividade, abordam-se os avanços políticos e as contradições inerentes ao cooperativismo de plataforma, em sua oposição ao capitalismo de plataforma.
Você acaba se tornando você mesmo? O personagem David Foster Wallace
Authors: Beccari Marcos Namba
Published: December 2020

Este artigo propõe uma reflexão sobre o mito literário atrelado ao nome David Foster Wallace após o suicídio do autor. Tal reflexão elege como alvo a versão retratada em O fim da turnê (James Ponsoldt, 2015), filme repudiado por familiares e colegas próximos de Wallace. De início, justifico a escolha de encarar DFW como personagem. Na sequência, discuto sobre a noção-chave da dissimulação em DFW, que elucida o dilema entre quem ele dizia ser e o possível personagem de si mesmo. Por fim, reconstruo a querela em torno do filme ora elencado e defendo a dissimulação wallaceana enquanto potência fabuladora que enaltece a ambiguidade.
Sergio Blanco (1971 - 2015)
Authors: Lima Ricardo Augusto de
Published: December 2020

Partindo do conceito ainda recente de autoficção cênica, proponho neste artigo uma aproximação entre a obra La ira de Narciso, de Sergio Blanco, de 2015, e alguns conceitos de Maurice Blanchot, como os de “experiência do fora” e de literatura como espaço de morte. Se entendermos a linguagem literária como aquela que institui uma nova realidade, podemos pensar a morte de um personagem homônimo como um suicídio ficcional ou, emprestando a expressão de Angélica Liddell, um “sacrifício como ato poético”. Ademais, a morte de um personagem que leva o mesmo nome de seu autor evoca a discussão de Roland Barthes sobre a morte autoral, aqui concretizada de duas formas: pela destruição de toda voz antecedente ao texto literário e pela autodestruição promovida pela escrita, sempre parricida, no aqui-agora da literatura e, com mais ênfase, do teatro. Logo, considero também pertinentes nestas reflexões os problemas da representação e de como a literatura se torna palco do fascínio e do temor do Eu em relação à própria morte e sua potência criadora.
A questão do suicídio em O som e a fúria
Authors: Tran Qui-Phiet , André Willian
Published: December 2020

Trata-se de uma tradução, e a versão original não possui resumo.
Suicídio como aprendizagem
Authors: Santos Natália Gonçalves de Souza
Published: December 2020

Este artigo discute a presença do suicídio nos ensaios críticos de Álvares de Azevedo, com ênfase em “Alfredo de Musset: Jacques Rolla”, uma tradução comentada de partes do poema referido no título. Ao analisar os contrastes presentes na composição das personagens mussetianas, o crítico brasileiro evidencia o embate entre crença e descrença existente sobretudo no protagonista. O encaminhamento dessa análise permite dizer que o suicídio no poema vai além de um ato de negação das estruturas sociais, razoavelmente comum naquele período, mas eleva o jovem de início cético a outro patamar na compreensão da experiência humana, convertendo a morte voluntária numa espécie de aprendizado.
Quando um heterônimo se suicida
Authors: Medeiros Ana Clara Magalhães de , Silva Junior Augusto Rodrigues da
Published: December 2020

A escrita de morte, chamada tanatografia, mostra-se operante na conjugação de elementos que fazem da literatura espaço prodigioso para discussão da condição humana desassossegada perante o morrer. Neste artigo, analisa-se a relação entre escrita e suicídio a partir da obra de um autor fictício erigido por Fernando Pessoa, conhecido como Barão de Teive. Acessamos desse heterônimo seu único manuscrito,A educação do estoico (1928), que lega lições autorais, sepulcrais e vitais formuladas no esteio da filosofia estoica em diálogo necessário com o socratismo. Relacionando o fenômeno heteronímico pessoano ao processo dialógico de construção de alteridades ensejado pelo teórico Mikhail Bakhtin, perscrutamos novos modos de observar o auto-aniquilamento de um autor-criado que cria prosa artística e filosófica no seio de seu fim.
Suicídio, desejo e gozo na escrita literária
Authors: Sachs Rafael Salmazi , Hayashi Renan Kenji Sales
Published: December 2020

O presente artigo descreve resultados de análise de um conto do japonês Yukio Mishima, no qual são abordadas questões sobre suicídio, sexo, honra, além do próprio patriotismo, aspecto central que nomeia a obra. Tal conto é relevante por possibilitar gestos de interpretação em campos que extrapolam as teorias literária e textual, viabilizando uma articulação com propostas dos campos do discurso e da Psicanálise. Esta última, de maior relevo neste trabalho, interessa particularmente porque oportuniza (re)pensar as relações entre constituição subjetiva, escrita, desejo e alteridade. Para condução da presente investigação, lançamos mão de revisão bibliográfica e análise discursiva da materialidade linguística como escolha metodológica. Destarte, tendo o material discursivo como ponto de partida, foi-nos possível destacar efeitos de sentido que emergem do texto de Mishima, em interpretações que encadeiam de maneira complexa as noções de corpo, sexo, gozo e o suicídio como mote de criação. Os resultados asseveram que, dada a especificidade da escrita de Mishima ¾bem como a dimensão complexa das questões que ele aborda ¾os gestos de interpretação ampliam e/ou subvertem sentidos de vida-morte, suicídio, desejo e gozo, ao tempo em que problematizam a escrita como um exercício de alcance da sublimação.
Para os não nascidos: a peça-suicídio de Sarah Kane
Authors: Amaral Lara Luiza Oliveira
Published: December 2020

Virginia Woolf escreve uma carta antes de ir em direção ao rio com os bolsos cheios de pedras. Sylvia Plath anota o número do telefone de seu psiquiatra em cima da mesa próxima ao fogão. Sarah Kane escreve sua última peça antes de retirar os cadarços para se enforcar. 4.48 Psychosis se torna uma espécie de “bilhete suicida” deixado por Kane antes do seu ato final. Pretendemos, neste trabalho, analisar não somente a autoaniquilação, tema central da peça, como também a sua relação com as teorias do pós-drama e a influência do lirismo na escrita e a imersão na interioridade da personagem. Para tanto, utilizaremos teóricos como Lehmann (2007) e Sarrazac (2012) para a teoria do drama; Alvarez (1999) para o suicídio; Lang (2015) para os estudos sobre Kane e seu contexto de escrita; dentre outros.
Pier Della Vigna x Catão de Útica
Authors: Fantin Maria Célia Martirani Bernardi
Published: December 2020

Por meio da análise de dois casos da Divina Comédia de Dante Alighieri ( 1998): o de Pier Della Vigna (canto XIII do Inferno) e o de Catão de Útica (de- signado a ser guardião do Purgatório, canto I), o presente estudo visa verificar de que maneira e a partir de quais preceitos filosófico - teológicos, esses do is per- sonagens suicidas são representados por uma das obras - primas da literatura universal. No primeiro caso, segundo o dantólogo Vittorio Sermonti (2018), o poeta é coerente com os ensinamentos de São Tomás de Aquino, expoente má- ximo do período da filosof ia Escolástica, em que os que se auto - aniquilam traem a Deus, pois Este, no momento da criação, concederia ao homem a graça de lhe confiar, em primeiríssima instância, a própria vida. Daí por que os suicidas se- jam condenados à cisão corpo - alma, no círculo dos violentos da tortuosa selva infernal. No segundo, Erich Auerbach (1989), observa que Catão – embora sui- cida e pagão – tenha sido absolvido por Dante, sendo designado ao Purgatório, porque reuniria todas as características capazes de fazer dele uma extr aordiná- ria “figura” de Cristo, já que sua morte voluntária seria heroica, ao escolher o martírio para resgatar Roma da escravidão de César.
anda vivo, não morreu
Authors: Damasceno Rodrigo Lobo
Published: December 2020

O ensaio procura realizar uma leitura da poesia de Torquato Neto a partir de uma relação entre vida e obra na qual o fato final da sua vida, o suicídio, complexifica a leitura da sua criação artística.
Sylvia Plath, Cláudia Roquette-Pinto e os limites da escrita: uma poética do autoaniquilamento.
Authors: Barbosa Aline Leal
Published: December 2020

A partir da análise comparativa da poética de Sylvia Plath e de Claudia Roquette-Pinto, unidas aqui por relação referencial bem como por certo anacronismo, este artigo pretende pensar a construção de uma linguagem que atravessa o tema e a materialidade do corpo, do feminino e da morte. O suicídio, na vida e na poética de Sylvia Plath, serve como chave de análise, ora refutada ora apresentada, para se pensar  essa escrita obscura, realizada numa espécie de “zona de sombra” entre o dizível e o indizível, no contato com as margens da vida, que vai recair sobre os extremos da linguagem. Nomes como Van Gogh, Antonin Artaud, Anne Sexton, Ana Cristina César, entre outros, são também evocados neste artigo como desagregadores de instituições, como a própria linguagem.
Flora da Serra do Cipó, Minas Gerais: Marcetieae (Melastomataceae)
Authors: Rocha Maria José Reis da , Silva Diego Nunes da , Romero Rosana , Guimarães Paulo José Fernandes
Published: December 2020

Este estudo visa ampliar o conhecimento sobre a família Melastomataceae na Serra do Cipó, Minas Gerais e, consequentemente, agregar novos dados ao projeto “Flora da Serra do Cipó, Minas Gerais”. Marcetieae é uma tribo recentemente descrita, representada no Brasil por 112 espécies e 18 gêneros, ocorrendo predominantemente na savana amazônica, cerrado, campo rupestre e, mais raramente, em ambientes florestais. Até o momento foram registradas na Serra do Cipó 15 espécies e seis gêneros, sendo Fritzschia o gênero mais representativo com seis espécies, seguido por Marcetia e Siphanthera com três espécies cada, e Aciotis, Acisanthera e Macairea com apenas uma espécie cada. São apresentadas chaves de identificação para os gêneros e espécies, descrições, pranchas de campo e notas taxonômicas, incluindo informações sobre distribuição geográfica e habitat.
Impact of lian gong on the quality of life of individuals with dizziness in primary care
Authors: Lopes Aline Lamas , Lemos Stela Maris Aguiar , Figueiredo Pedro Henrique Scheidt , Santos Juliana Nunes
Published: December 2020

OBJECTIVE: To assess the effects of the lian gong practice as a rehabilitation strategy in primary health care on the quality of life and functional capacity of people with dizziness. METHODS: Randomized controlled clinical trial. Thirty-six people, who were complaining of dizziness or vertigo without the presence of central signs and were referred by the physician of primary health care participated in the study. The individuals were randomly allocated to the three experimental conditions: lian gong group (n = 11), vestibular rehabilitation group (n = 11) and control group (n = 14). The interventions were weekly, in group, with duration of 12 sessions. The participants were evaluated before and after the intervention regarding quality of life by the 36-Item Short Form Health Survey and the functional capacity by the Short Physical Performance Battery. RESULTS: The scores of all domains of the Short Form Health Survey increased after intervention in the lian gong group. This variation was higher than that observed in the control group for the domains functional capacity, limitation by physical aspects and general health status, and also higher than that found after the intervention in the Vestibular Rehabilitation Group regarding pain. No differences were found in the Short Physical Performance Battery. CONCLUSIONS: Based on the results presented, lian gong improves the quality of life of individuals with dizziness, without altering the functional capacity.