bluuebunny/crossref_metadata_2025 huggingface dataset:
Estimates of Generalized Hessians for Optimal Value Functions in Mathematical Programming
Authors: Zemkoho Alain B.
Published: December 2021

We consider the optimal value function of a parametric optimization problem. A large number of publications have been dedicated to the study of continuity and differentiability properties of the function. However, the differentiability aspect of works in the current literature has mostly been limited to first order analysis, with focus on estimates of its directional derivatives and subdifferentials, given that the function is typically nonsmooth. With the progress made in the last two to three decades in major subfields of optimization such as robust, minmax, semi-infinite and bilevel optimization, and their connection to the optimal value function, there is a need for a second order analysis of the generalized differentiability properties of this function. This could enable the development of robust solution algorithms, such as the Newton method. The main goal of this paper is to provide estimates of the generalized Hessian for the optimal value function. Our results are based on two handy tools from parametric optimization, namely the optimal solution and Lagrange multiplier mappings, for which completely detailed estimates of their generalized derivatives are either well-known or can easily be obtained.
Association between congenital heart defects and maternal manganese and iron concentrations: a case–control study in China
Authors: Wang Meixian , Tian Yan , Yu Ping , Li Nana , Deng Ying , Li Lu , Kang Hong , Chen Dapeng , Wang Hui , Liu Zhen , Liang Juan
Published: December 2021

To investigate the correlation between maternal manganese and iron concentrations and the risk of CHD among their infant. A multi-center hospital-based case control study was conducted in China. There were 322 cases and 333 controls have been selected from pregnant women who received prenatal examinations. Correlations between CHDs and maternal manganese and iron concentrations were estimated by conditional logistic regression. Moreover, the interaction between manganese and iron on CHDs was analyzed. Compared with the controls, mothers whose hair manganese concentration was 3.01 μg/g or more were more likely to have a child with CHD than those with a lower concentration. The adjusted OR was 2.68 (95%CI = 1.44–4.99). The results suggested that mothers whose iron content was 52.95 μg/g or more had a significantly higher risk of having a child with CHD (aOR = 2.87, 95%CI = 1.54–5.37). No interaction between maternal manganese and iron concentrations was observed in the multiplicative or additive model. The concurrently existing high concentration of manganese and iron may bring higher risk of CHD (OR = 7.02). Women with excessive manganese concentrations have a significantly increased risk of having offspring with CHDs. The high maternal iron status also correlates with CHDs. The concurrently existing high concentration of manganese and iron may bring higher risk of CHD.
Measuring raw-material criticality of product systems through an economic product importance indicator: a case study of battery-electric vehicles
Authors: Lütkehaus Hauke , Pade Christian , Oswald Matthias , Brand Urte , Naegler Tobias , Vogt Thomas
Published: December 2021

Purpose

The concept of criticality concerns the probability and the possible impacts of shortages in raw-material supply and is usually applied to regional economies or specific industries. With more and more products being highly dependent on potentially critical raw materials, efforts are being made to also incorporate criticality into the framework of life cycle sustainability assessment (LCSA). However, there is still some need for methodological development of indicators to measure raw-material criticality in LCSA.

Methods

We therefore introduce ‘economic product importance’ (EPI) as a novel parameter for the product-specific evaluation of the relevance and significance of a certain raw material for a particular product system. We thereby consider both the actual raw-material flows (life cycle inventories) and the life cycle cost. The EPI thus represents a measure for the material-specific product-system vulnerability (another component being the substitutability). Combining the product-system vulnerability of a specific product system towards a certain raw material with the supply disruption probability of that same raw material then yields the product-system specific overall criticality with regard to that raw material. In order to demonstrate our novel approach, we apply it to a case study on a battery-electric vehicle.

Results

Since our approach accounts for the actual amounts of raw materials used in a product and relates their total share of costs to the overall costs of the product, no under- or over-estimation of the mere presence of the raw materials with respect to their relevance for the product system occurs. Consequently, raw materials, e.g. rare earth elements, which are regularly rated highly critical, do not necessarily reach higher criticality ranks within our approach, if they are either needed in very small amounts only or if their share in total costs of the respective product system is very low. Accordingly, in our case study on a battery-electric vehicle product system, most rare earth elements are ranked less critical than bulk materials such as copper or aluminium.

Conclusion

Our EPI approach constitutes a step forward towards a methodology for the raw-material criticality assessment within the LCSA framework, mainly because it allows a product-specific evaluation of product-system vulnerability. Furthermore, it is compatible with common methods for the supply disruption probability calculation — such as GeoPolRisk, ESP or ESSENZ — as well as with available substitutability evaluations. The practicability and usefulness of our approach has been shown by applying it to a battery-electric vehicle.
Review of Mercury’s dynamic magnetosphere: Post-MESSENGER era and comparative magnetospheres
Authors: Sun Weijie , Dewey Ryan M. , Aizawa Sae , Huang Jia , Slavin James A. , Fu Suiyan , Wei Yong , Bowers Charles F.
Published: December 2021

This review paper summarizes the research of Mercury’s magnetosphere in the Post-MESSENGER era and compares its dynamics to those in other planetary magnetospheres, especially to those in Earth’s magnetosphere. This review starts by introducing the planet Mercury, including its interplanetary environment, magnetosphere, exosphere, and conducting core. The frequent and intense magnetic reconnection on the dayside magnetopause, which is represented by the flux transfer event “shower”, is reviewed on how they depend on magnetosheath plasmaβand magnetic shear angle across the magnetopause, following by how it contributes to the flux circulation and magnetosphere-surface-exosphere coupling. In the next, Mercury’s magnetosphere under extreme solar events, including the core induction and the reconnection erosion on the dayside magnetosphere, the responses of the nightside magnetosphere, are reviewed. Then, the dawn-dusk properties of the plasma sheet, including the features of the ions, the structure of the current sheet, and the dynamics of magnetic reconnection, are summarized. The last topic is devoted to the particle energization in Mercury’s magnetosphere, which includes the energization of the Kelvin-Helmholtz waves on the magnetopause boundaries, reconnection-generated magnetic structures, and the cross-tail electric field. In each chapter, the last section discusses the open questions related to each topic, which can be considered by the simulations and the future spacecraft mission. We end this paper by summarizing the future BepiColombo opportunities, which is a joint mission of ESA and JAXA and is en route to Mercury.
Die wahrgenommene feministische Bedrohung: Empirische Befunde zum Antifeminismus in Deutschland
Authors: Schnabel Annette , Beyer Heiko , Ülpenich Bettina
Published: December 2021

Die Frauenbewegung war von Beginn an von antifeministischen Diskursen und Initiativen begleitet. Diese reagieren auf den Erfolg feministischer Bewegung und Politik. Mit einer empirischen Analyse antifeministischer Einstellungen auf Grundlage einer quantitativen Bevölkerungsbefragung können wir zeigen, dass in Deutschland aktuelle antifeministische Überzeugungen nicht nur in ein umfassendes Einstellungscluster eingebettet sind, das eine konservativ-traditionelle Geschlechterordnung widerspiegelt, sondern sich auch als Reaktion auf als negativ empfundene Folgen des institutionellen und gesamtgesellschaftlichen Wandels verstehen lassen müssen.
Impact of Gastropexy/Omentopexy on Gastrointestinal Symptoms after Laparoscopic Sleeve Gastrectomy
Authors: Abou-Ashour Hady Saleh
Published: December 2021

Background

Laparoscopic sleeve gastrectomy (LSG) has become a single-step operation for the management of severe obesity. A statistically significant number of participants who undergo this procedure experience nausea, vomiting, and reflux symptoms early after the operation. The objectives of this study were to measure the positive or negative effect of gastropexy on reducing distressing postoperative LSG-related gastrointestinal symptoms.

Patients and Methods

This was a comparative randomized study conducted from January 2018 to January 2021. The study was carried out in the general surgery department at Menoufia University Hospital, Menoufia Faculty of Medicine in Egypt. Two hundred participants were included randomly during this trial. The participants were divided into two groups, with 100 patients in each group. Patients in group A underwent gastropexy, and patients in group B underwent LSG without gastropexy.

Results

There was no significant difference between the groups in age or sex (p > 0.05). There was no significant difference in the length of hospital stay (p > 0.05). There was a significant difference between the two groups regarding nausea, vomiting, reflux symptoms, and the amount and frequency of antiemetics used (p < 0.001). There was also a significant difference in hospital readmissions (p < 0.05) and in clinic visits during the postoperative period.

Conclusions

Patients who underwent gastropexy showed a significant reduction in antiemetic consumption and a significantly lower incidence of postoperative nausea, vomiting, gastroesophageal reflux disease symptoms and gastric torsion than those who did not undergo gastropexy.

Graphical abstract
Should Autists Have Cultural Rights?
Authors: de Vries Bouke
Published: December 2021

While several scholars have argued that the rise of the internet has allowed an autistic culture to emerge over the past two decades, the question of whether people with autism or, as some members of this group refer to themselves, ‘autists’, are legally entitled to their own cultural rights has not been investigated. This article fills part of this lacuna by considering whether such entitlements exist from the perspective of human rights law. I start by showing that, insofar as (some) autists have their own culture(s), they are likely to be entitled to cultural rights under existing human rights treaties, before arguing that the absence of evidence that their beliefs, values, and behaviors are significantly shaped by distinct social norms renders it unclear whether they do in fact have their own culture(s). However, I end by arguing that, in terms of autists’ entitlements from a human rights perspective, little seems to depend on this.
The Use of Image Analysis and Sensory Analysis for the Evaluation of Cultivar Differentiation of Freeze-Dried and Lacto-Fermented Beetroot (Beta vulgaris L.)
Authors: Ropelewska Ewa , Wrzodak Anna
Published: December 2021

The aim of the research was to compare the possibility of distinguishing the cultivars of processed beetroots using image analysis technique and sensory evaluation. The differentiation of processed samples was tested for freeze-dried beetroot ‘Czerwona Kula’ and ‘Cylindra’, lacto-fermented beetroot ‘Czerwona Kula’ and ‘Cylindra’, freeze-dried lacto-fermented beetroot ‘Czerwona Kula’ and ‘Cylindra’. The textures from the images of quarters of root slices, as well as sensory attributes evaluated by expert sensory assessors, were determined. The differences in the means of selected textures from color spaces Lab, RGB and XYZ for different cultivars of raw and processed beetroots were observed. The raw beetroots ‘Czerwona Kula’ and ‘Cylindra’ were discriminated with the accuracy of up to 94.5% for models built based on selected texture from color space RGB. In the case of processed beetroots ‘Czerwona Kula’ and ‘Cylindra’, the accuracy reached 96% (color space Lab) for freeze-dried beetroots, 99% (color space Lab) for lacto-fermented beetroots, 98.5% (color space Lab) for freeze-dried lacto-fermented beetroots. In the case of sensory attributes, no statistically significant differences were observed between the beetroot samples.
Radiation boost for synchronous solitary inguinal lymph node metastasis during neoadjuvant chemoradiotherapy for locally advanced rectal cancer
Authors: Chen Mo , Liu Shuai , Xu Meng , Yi Han-chen , Liu Yanping , He Fang
Published: December 2021

Background

Some patients with locally advanced rectal cancer (LARC) present with inguinal lymph node metastases without evidence of other systemic disease, known as solitary inguinal lymph node metastasis (SILNM). These patients may represent a distinct subset who have a more favorable prognosis and should be treated with curative intent. The optimal treatment strategy for these patients has not been determined.

Methods

We retrospectively reviewed 16 consecutive LARC patients diagnosed between January 2017 and December 2019, who had SILNM, were treated with an inguinal lymph nodes (ILN) radiation boost with curative intent during neoadjuvant chemoradiotherapy (nCRT) and underwent total mesorectal excision (TME). We used Kaplan–Meier survival curves to calculate survival rates, and recorded radiation-related toxicity.

Results

None of these 16 patients developed pelvic or inguinal recurrences, and 3 of the patients developed distant metastases. The 3-year overall survival rate and locoregional relapse-free survival rate were both 100%. The 3-year disease-free rate and distant metastasis-free survival rate were both 81.3%. Of 5 patients who had ILN dissection for suspicious ILNs after neoadjuvant treatment, 2 had residual nodal tumor confirmed. Grade 3 toxicity was found in 5 patients, and no patients had lymphedema or other grade 4 or 5 toxicities.

Conclusions

In LARC patients with synchronous SILNM, a radiation boost to the ILNs during nCRT achieved excellent local control with acceptable toxicity. Though the optimal treatment strategy remains unclear, nCRT with an ILN radiation boost prior to TME may be a reasonable therapeutic approach to consider for this subset of patients.
Effect of drill pipe orbital motion on non-Newtonian fluid flow in an eccentric wellbore: a study with computational fluid dynamics
Authors: Ferroudji Hicham , Hadjadj Ahmed , Ofei Titus Ntow , Gajbhiye Rahul Narayanrao , Rahman Mohammad Azizur , Qureshi M. Fahed
Published: December 2021

To ensure an effective drilling operation of an explored well, the associated hydraulics program should be established carefully based on the correct prediction of a drilling fluid’s pressure drop and velocity field. For that, the impact of the drill string orbital motion should be considered by drilling engineers since it has an important influence on the flow of drilling fluid and cuttings transport process. In the present investigation, the finite volume method coupled with the sliding mesh approach is used to analyze the influence of the inner cylinder orbital motion on the flow of a power-law fluid (Ostwald-de Waele) in an annular geometry. The findings indicate that the orbital motion positively affects the homogeneity of the power-law axial velocity through the entire eccentric annulus; however, this impact diminishes as the diameter ratio increases. In addition, higher torque is induced when the orbital motion occurs, especially for high values of eccentricity and diameter ratio; nonetheless, a slight decrease in torque is recorded when the fluid velocity increases.
Putting the Squeeze on Compression Garments: Current Evidence and Recommendations for Future Research: A Systematic Scoping Review
Authors: Weakley Jonathon , Broatch James , O’Riordan Shane , Morrison Matthew , Maniar Nirav , Halson Shona L.
Published: December 2021

Background

Compression garments are regularly worn during exercise to improve physical performance, mitigate fatigue responses, and enhance recovery. However, evidence for their efficacy is varied and the methodological approaches and outcome measures used within the scientific literature are diverse.

Objectives

The aim of this scoping review is to provide a comprehensive overview of the effects of compression garments on commonly assessed outcome measures in response to exercise, including: performance, biomechanical, neuromuscular, cardiovascular, cardiorespiratory, muscle damage, thermoregulatory, and perceptual responses.

Methods

A systematic search of electronic databases (PubMed, SPORTDiscus, Web of Science and CINAHL Complete) was performed from the earliest record to 27 December, 2020.

Results

In total, 183 studies were identified for qualitative analysis with the following breakdown: performance and muscle function outcomes: 115 studies (63%), biomechanical and neuromuscular: 59 (32%), blood and saliva markers: 85 (46%), cardiovascular: 76 (42%), cardiorespiratory: 39 (21%), thermoregulatory: 19 (10%) and perceptual: 98 (54%). Approximately 85% (n = 156) of studies were published between 2010 and 2020.

Conclusions

Evidence is equivocal as to whether garments improve physical performance, with little evidence supporting improvements in kinetic or kinematic outcomes. Compression likely reduces muscle oscillatory properties and has a positive effect on sensorimotor systems. Findings suggest potential increases in arterial blood flow; however, it is unlikely that compression garments meaningfully change metabolic responses, blood pressure, heart rate, and cardiorespiratory measures. Compression garments increase localised skin temperature and may reduce perceptions of muscle soreness and pain following exercise; however, rating of perceived exertion during exercise is likely unchanged. It is unlikely that compression garments negatively influence exercise-related outcomes. Future research should assess wearer belief in compression garments, report pressure ranges at multiple sites as well as garment material, and finally examine individual responses and varying compression coverage areas.
Neuromuscular sonography detects changes in muscle echotexture and nerve diameter in ICU patients within 24 h
Authors: Bulinski Catherine , Viard Maxime , Vlazak Alexander , Habig Kathrin , Juenemann Martin , Best Christoph , Schirotzek Ingo , Kaps Manfred , Krämer Heidrun H.
Published: December 2021

Purpose

During an ICU stay, changes in muscles and nerves occur that is accessible via neuromuscular sonography.

Methods

17 patients recruited from the neurological and neurosurgical ICU (six women; 66 ± 3 years) and 7 healthy controls (three women, 75 ± 3 years) were included. Muscle sonography (rectus abdominis, biceps, rectus femoris and tibialis anterior muscles) using gray-scale values (GSVs), and nerve ultrasound (peroneal, tibial and sural nerves) analyzing the cross-sectional area (CSA) were performed on days 1 (t1), 3 (t2), 5 (t3), 8 (t4), and 16 (t5) after admission.

Results

Time course analysis revealed that GSVs were significantly higher within the patient group for all of the investigated muscles (rectus abdominis: F = 7.536; p = 0.011; biceps: F = 14.761; p = 0.001; rectus femoris: F = 9.455; p = 0.005; tibialis anterior: F = 7.282; p = 0.012). The higher GSVs were already visible at t1 or, at the latest, at t2 (tibialis anterior muscles). CSA was enlarged in all of the investigated nerves in the patient group (peroneal nerve: F = 7.129; p = 0.014; tibial nerve: F = 28.976, p < 0.001; sural nerve: F = 13.051; p = 0.001). The changes were visible very early (tibial nerve: t1; peroneal nerve: t2). The CSA of the motor nerves showed an association with the ventilation time and days within the ICU (t1 through t4; p < 0.05).

Discussion

We detected very early changes in the muscles and nerves of ICU-patients. Nerve CSA might be a useful parameter to identify patients who are at risk for difficult weaning. Therefore our observations might be severity signs of neuromuscular suffering for the most severe patients.
Accelerating multi-objective neural architecture search by random-weight evaluation
Authors: Hu Shengran , Cheng Ran , He Cheng , Lu Zhichao , Wang Jing , Zhang Miao
Published: December 2021

For the goal of automated design of high-performance deep convolutional neural networks (CNNs), neural architecture search (NAS) methodology is becoming increasingly important for both academia and industries. Due to the costly stochastic gradient descent training of CNNs for performance evaluation, most existing NAS methods are computationally expensive for real-world deployments. To address this issue, we first introduce a new performance estimation metric, named random-weight evaluation (RWE) to quantify the quality of CNNs in a cost-efficient manner. Instead of fully training the entire CNN, the RWE only trains its last layer and leaves the remainders with randomly initialized weights, which results in a single network evaluation in seconds. Second, a complexity metric is adopted for multi-objective NAS to balance the model size and performance. Overall, our proposed method obtains a set of efficient models with state-of-the-art performance in two real-world search spaces. Then the results obtained on the CIFAR-10 dataset are transferred to the ImageNet dataset to validate the practicality of the proposed algorithm. Moreover, ablation studies on NAS-Bench-301 datasets reveal the effectiveness of the proposed RWE in estimating the performance compared to existing methods.
Carbon-Coated Three-Dimensional MXene/Iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-Ion Batteries
Authors: Yang Su Hyun , Lee Yun Jae , Kang Heemin , Park Seung-Keun , Kang Yun Chan
Published: December 2021

Two-dimensional (2D) MXenes are promising as electrode materials for energy storage, owing to their high electronic conductivity and low diffusion barrier. Unfortunately, similar to most 2D materials, MXene nanosheets easily restack during the electrode preparation, which degrades the electrochemical performance of MXene-based materials. A novel synthetic strategy is proposed for converting MXene into restacking-inhibited three-dimensional (3D) balls coated with iron selenides and carbon. This strategy involves the preparation of Fe2O3@carbon/MXene microspheres via a facile ultrasonic spray pyrolysis and subsequent selenization process. Such 3D structuring effectively prevents interlayer restacking, increases the surface area, and accelerates ion transport, while maintaining the attractive properties of MXene. Furthermore, combining iron selenides and carbon with 3D MXene balls offers many more sites for ion storage and enhances the structural robustness of the composite balls. The resultant 3D structured microspheres exhibit a high reversible capacity of 410 mAh g−1 after 200 cycles at 0.1 A g−1 in potassium-ion batteries, corresponding to the capacity retention of 97% as calculated based on 100 cycles. Even at a high current density of 5.0 A g−1, the composite exhibits a discharge capacity of 169 mAh g−1.
Calcium-Doped Boron Nitride Aerogel Enables Infrared Stealth at High Temperature Up to 1300 °C
Authors: Zhu Mengya , Li Guangyong , Gong Wenbin , Yan Lifeng , Zhang Xuetong
Published: December 2021

Boron nitride (BN) aerogels, composed of nanoscale BN building units together with plenty of air in between these nanoscale building units, are ultralight ceramic materials with excellent thermal/electrical insulation, great chemical stability and high-temperature oxidation resistance, which offer considerable advantages for various applications under extreme conditions. However, previous BN aerogels cannot resist high temperature above 900 °C in air atmosphere, and high-temperature oxidation resistance enhancement for BN aerogels is still a great challenge. Herein, a calcium-doped BN (Ca-BN) aerogel with enhanced high-temperature stability (up to ~  1300 °C in air) was synthesized by introducing Ca atoms into crystal structure of BN building blocks via high-temperature reaction between calcium phosphate and melamine diborate architecture. Such Ca-BN aerogels could resist the burning of butane flame (~  1300 °C) and keep their megashape and microstructure very well. Furthermore, Ca-BN aerogel serves as thermal insulation layer, together with Al foil serving as both low-infrared-emission layer and high-infrared-reflection layer, forming a combination structure that can effectively hide high-temperature target (heated by butane flame). Such successful chemical doping of metal element into crystal structure of BN may be helpful in the future design and fabrication of advanced BN aerogel materials, and further extending their possible applications to extremely high-temperature environments.
Pulsed-laser source characterization in laboratory seismic experiments
Authors: Shen C. , Brito D. , Diaz J. , Sanjuan F. , Bordes C. , Garambois S.
Published: December 2021

The present study aimed to characterize the properties of a laser-generated seismic source for laboratory-scale geophysical experiments. This consisted of generating seismic waves in aluminum blocks and a carbonate core via pulsed-laser impacts and measuring the wave-field displacement via laser vibrometry. The experimental data were quantitatively compared to both theoretical predictions and 2D/3D numerical simulations using a finite element method. Two well-known and distinct physical mechanisms of seismic wave generation via pulsed-laser were identified and characterized accordingly: a thermoelastic regime for which the incident laser power was relatively weak, and an ablation regime at higher incident powers. The radiation patterns of the pulsed-laser seismic source in both regimes were experimentally measured and compared with that of a typical ultrasonic transducer. This study showed that this point-like, contact-free, reproducible, simple-to-use laser-generated seismic source was an attractive alternative to piezoelectric sources for laboratory seismic experiments, especially those concerning small scale, sub-meter measurements.
Can negative emotions increase students’ plagiarism and cheating?
Authors: Tindall Isabeau K. , Fu Kit Wing , Tremayne Kell , Curtis Guy J.
Published: December 2021

The challenges of higher education can be stressful, anxiety-producing, and sometimes depressing for students. Such negative emotions may influence students’ attitudes toward assessment, such as whether it is perceived as acceptable to engage in plagiarism. However, it is not known whether any impact of negative emotions on attitudes toward plagiarism translate into actual plagiarism behaviours. In two studies conducted at two universities (Study 1 N = 718; Study 2 N = 490), we examined whether negative emotionality influenced plagiarism behaviour via attitudes, norms, and intentions as predicted by the theory of planned behaviour. In both studies, negative affect predicted plagiarism intentions mediated by perceived norms, and intentions predicted plagiarism behaviour. These findings suggest that students’ negative emotionality is a risk for plagiarism engagement and that higher education institutions should support students’ emotional well-being, especially regarding assessment practices.
Interdependence of Growth, Structure, Size and Resource Consumption During an Economic Growth Cycle
Authors: King Carey W.
Published: December 2021

This paper explains how the Human and Resources with MONEY (HARMONEY) economic growth model exhibits realistic dynamic interdependencies relating resources consumption, growth, and structural change. We explore dynamics of three major structural metrics of an economy. First, we show that an economic transition to relative decoupling of gross domestic product (GDP) from resource consumption is an expected pattern that occurs because of physical limits to growth, not a response to avoid physical limits. While increasing operational resource efficiency does increase the level of relative decoupling, so does a change in pricing from one based on full costs to one based only on marginal costs that neglect depreciation and interest payments. Marginal cost pricing leads to higher debt ratios and a perception of higher levels of relative resource decoupling. Second, if assuming full labor bargaining power for wages, when a previously-growing economy reaches peak resource extraction and GDP, wages remain high but profits and debt decline to zero. By removing bargaining power, profits can remain positive at the expense of declining wages. Third, the internal structure of HARMONEY evolves in the same way the post-World War II U.S. economy. This is measured as the distribution of intermediate transactions within the input-output tables of both the model and U.S. economy.
Testen als evidenzbasierte Lernmethode: Empirische und theoretische Gründe für eine Anwendung im Unterricht
Authors: Barenberg Jonathan , Dutke Stephan
Published: December 2021

In Schule und Hochschule werden Tests meist als Instrument zur Leistungsüberprüfung und -bewertung eingesetzt. Dabei weisen Ansätze des evidenzbasierten Lehrens und Lernens darauf hin, dass Testen als Abrufübung auch zur Lernförderung eingesetzt werden können. Es werden drei Argumente erörtert, die für eine Anwendung von Abrufübungen als Lernmethode in der Unterrichtspraxis sprechen: (1) Entwicklung der Testeffektforschung von Laborkontexten zu Anwendungskontexten sowie direkte Effekte des Testens auf (2) den Transfer von Wissen und (3) auf unterrichtsrelevante, metakognitive Prozesse. Abschließend werden sowohl Schlussfolgerungen für die Umsetzung von Abrufübungen im Unterricht beschrieben als auch Konsequenzen für den Wissenschafts-Praxis-Transfer diskutiert.
Comparison of historical and current temperatures in show caves (Slovenia)
Authors: Šebela Stanka , Turk Janez
Published: December 2021

Historical air temperatures at three karst caves in Slovenia have been compared to current data time series. In Postojnska Jama (PJ), the most visited show cave in Slovenia, the significant temperature difference between historical and modern measurements at the Pulpito site relates to the months April to November. Mean monthly temperatures measured at the Sepolcro site (PJ) in the modern period (2016–2019) are year round significantly higher than in the historical period (1935–1937). The temperature increase over the last 85 years in PJ is attributed to outside temperature rise and additional heat input from visitors, especially for Sepolcro site. A comparison of current (2017–2019) and historical (1956–1957) temperature data in touristically poorly visited Predjama Cave shows lower increase as in PJ and is completely related to outside cave conditions. In the case of Škocjanske Jame (Tiha Jama), air temperature has not significantly increased since the historical 1928 measurements because the monitoring site looks to be morphologically isolated from significant impacts of outside climate and visitors.
Analysis the influence of pulse-to-pulse stability of modulator on high-power microwave output of pulsed klystron
Authors: Liu Yongfang , Matsumoto Hiroshi , Li Lin , Gu Ming
Published: December 2021

X-ray free electron laser (XFEL) facility based on electron linear accelerator (LINAC) is regarded as one kind of the fourth-generation light source with the characteristics of high intensity, exceptional brightness, ultrashort pulse duration, and spatial coherence. In electron linear accelerator, energy of beam bunches is provided by high-power electromagnetic microwaves which are generated by a microwave tube called klystron. The stability of beam voltage of klystron occupies a key position in both the stability of output RF (Radio Frequency) power and the jitter of output RF phase, furthermore, it plays an extremely important role in beam energy stability of electron linear accelerator. In this paper, high power RF fluctuation and phase jitter of klystron output caused by beam voltage instability of klystron are analyzed and calculated. Influence of klystron beam voltage instability on beam energy gain in linear accelerator have also been further analyzed and calculated. The calculating procedure is particularly valuable for us to understand the relationship between pulse modulator stability and beam energy gain fluctuations. Finally, relevant experimental results measured by Shanghai Soft X-ray Free Electron Laser Test Facility (SXFEL-TF) is presented.
Operation analysis of C3-MR process cold box by grey system theory
Authors: Yang Yuan , Xiao Chuantao , Jia Zhipeng
Published: December 2021

In this paper, the problems of high refrigerant line differential pressure and uneven distribution of cold energy in cold box regulation under C3-MR process are studied. Five reasons are predicted by engineering performance. Using gas chromatography experiment and grey system pure mathematics analysis, it is determined that the main causes of the problem are unreasonable distribution ratio of each group of mixed refrigerants and disordered latent heat of vaporization of refrigerants. Furthermore, the grey system model is used to study: 1. grey relation analysis model shows that the correlation degree of T3 temperature measuring point is 0.8552, which is the only main factor. The abnormal working condition is determined by the project to be caused by incorrect proportion of N2 components. 2. According to GM(1,N) model, the driving term of T3 temperature measuring point is 3.8304, which needs to be supplemented with N2 component to eliminate the problem. 3. After adding N2 to 10% (mol component), abnormal working conditions disappeared. The GM(1,N) model is used again to verify that the difference of driving results is small, the average relative error is 24.91%, and the accuracy of the model is in compliance.
Norms of inclusions between some spaces of analytic functions
Authors: Llinares Adrián
Published: December 2021

The inclusions between the Besov spaces $$B^q$$

B
q

, the Bloch space $$\mathcal {B}$$
B
and the standard weighted Bergman spaces $$A^p_{\alpha}$$

A
α
p

are completely understood, but the norms of the corresponding inclusion operators are in general unknown. In this work, we compute or estimate asymptotically the norms of these inclusions.
Autonomous maneuver strategy of swarm air combat based on DDPG
Authors: Wang Luhe , Hu Jinwen , Xu Zhao , Zhao Chunhui
Published: December 2021

Unmanned aerial vehicles (UAVs) have been found significantly important in the air combats, where intelligent and swarms of UAVs will be able to tackle with the tasks of high complexity and dynamics. The key to empower the UAVs with such capability is the autonomous maneuver decision making. In this paper, an autonomous maneuver strategy of UAV swarms in beyond visual range air combat based on reinforcement learning is proposed. First, based on the process of air combat and the constraints of the swarm, the motion model of UAV and the multi-to-one air combat model are established. Second, a two-stage maneuver strategy based on air combat principles is designed which include inter-vehicle collaboration and target-vehicle confrontation. Then, a swarm air combat algorithm based on deep deterministic policy gradient strategy (DDPG) is proposed for online strategy training. Finally, the effectiveness of the proposed algorithm is validated by multi-scene simulations. The results show that the algorithm is suitable for UAV swarms of different scales.
The Biology of BDSM: A Systematic Review
Authors: Wuyts Elise , Morrens Manuel
Published: December 2021

Introduction

BDSM is an abbreviation used to reference the concepts of bondage and discipline, dominance and submission, sadism and masochism, enacted by power exchanges between consensual partners. In recent years, attention has shifted from the idea of BDSM as a pathological and tabooed niche practice towards viewing BDSM as a healthy form of intimacy.

Aim

This systematic review brings together all existing literature on the biology of BDSM and places it in a broader biological context.

Methods

A systematic search was conducted on PubMed, Web of Science and PsycARTICLES, of which 10 articles are included and discussed in this systematic review.

Results

There is evidence for cortisol changes in submissives as a result of a BDSM interaction, suggesting involvement of the physiological stress system. Endocannabinoid changes implicate the pleasure and reward system. In dominants, this biologically measured pleasure seemed to be dependent on power play rather than pain play. Testosterone and oxytocin are also implicated in BDSM, though their role is less evident. Research into brain region activity patterns related to BDSM interest suggests a role for the parietal operculum and ventral striatum in the context of the pleasure and reward system, the primary and secondary somatosensory cortex in the context of pain perception, empathy-related circuits such as the anterior insula, anterior midcingulate cortex and sensorimotor cortex and the left frontal cortex in the context of social and sexual interactions. Pain thresholds are shown to be higher in submissive individuals and a BDSM interaction may cause pain thresholds to rise in submissives as well.

Conclusion

BDSM interactions are complex and influenced by several psychological, social and biological processes. Though research is limited, there is emerging evidence for an interaction between several biological systems involved in these types of interests and activities. This means there is an important role for future research to replicate and supplement current results.
Blockchain in Outer Space
Authors: De Filippi Primavera , Leiter Andrea
Published: December 2021

Blockchain technology has spurred the emergence of powerful narratives to promote new ways of governing outer space. The list of proposed uses for blockchain applications in outer space is endless—from property registries for asteroid mining, to supply chain management systems, or interplanetary cryptocurrencies for the space economy—along with Elon Musk claiming that “SpaceX is going to put a literal Dogecoin on the literal moon.” Yet, thus far, none of these projects have gone beyond simple declarations or white papers, mostly due to the inherent limitations on the effective enforcement of blockchain-based rules outside of their own technical framework. In this essay, we argue that blockchain technology is relevant for outer space because it fosters novel narratives advancing possible futures characterized by new modes of governance. The strongest and most prominent of these narratives is the crypto-libertarian one, which draws heavily on the absence of a state, the sanctity of property, and the primacy of private ordering through decentralized markets. But there are other narratives proposed by relevant actors in the blockchain space that are dedicated to other modes of governance. By focusing on alternative narratives for blockchain technology, we illustrate how the possible applications of blockchain technology in outer space may extend beyond the current libertarian dreams, to support a more commons-based approach to outer space governance.
Sincere Cooperation between EU and Member States in the Field of Readmission: The More the Merrier?
Authors: MOLINARI Caterina
Published: December 2021

Cooperation with third countries on readmission has occupied an increasingly prominent place in the EU's migration management strategy. The EU and its Member States have progressively concluded an extensive set of bilateral and multilateral, binding and non-binding, cooperation instruments on readmission. This proliferation questions the field's coherence with the principle of sincere cooperation, governing the interplay between the Union's and Member States’ action. By taking this principle as a benchmark, the article highlights the ineffective nature of the current ‘unprincipled’ pursuit of readmission goals. It also demonstrates that sincere cooperation—if read together with subsidiarity—does not necessarily favour the Union's international action, to the detriment of the Member States’. Rather, it requires a good faith effort to identify, and stand by, the most effective level of action.
Creating and Protecting Paths: Learning in an Entrepreneurial State
Authors: Sogner Knut
Published: December 2021

This paper discusses how a Norwegian entrepreneurial state has performed over more than seventy years, based on an analysis of state involvement in Kongsberg Våpenfabrikk/the Kongsberg Group from 1945 and to 2015. Mariana Mazzucato has argued that bold technological investments by the state has long-term beneficial effects. The development of the Kongsberg companies adds nuance to this picture. On the one hand, the defense company Kongsberg Våpenfabrikk failed as a company in 1987 and was unbundled into a number of new companies independent of one another. On the other hand, some of the successor companies have been very successful, both in the oil and gas sector and within defense. Taking the defense and oil and gas company the Kongsberg Group as a case, this paper argues that a new style of entrepreneurial state developed in the 1990s and that it proved very successful. The old entrepreneurial state was heavy-handed, bold, and very long-term in its aims; the new entrepreneurial state was cautious, many-headed, and worked through the management of the company. The new entrepreneurial state combined state ownership, stock listing, and procurement considerations and was supported by both the Ministry of Industry and the Ministry of Defense. This new governance structure facilitated a stable corporation that over time integrated other Norwegian maritime electronics companies, which themselves had a checkered history under the old entrepreneurial state. A new corporate governance regime emerged and managed both to protect old and established product lines and to facilitate innovation both in defense and maritime electronics.
Diets with higher insulinaemic potential are associated with increased risk of overall and cardiovascular disease-specific mortality
Authors: Wang Yingying , Chen Bo , Zhang Jiawei , Li Hairong , Zeng Xufen , Zhang Zhuang , Zhu Yu , Li Xiude , Hu Anla , Zhao Qihong , Yang Wanshui
Published: December 2021

Hyperinsulinaemia and insulin resistance have been proposed to be associated with mortality risk, and diet can modulate insulin response. However, whether dietary patterns with high insulinaemic potential are associated with mortality remains unknown. We prospectively examined the associations between hyperinsulinaemic diets and the risk of total and cause-specific mortality in a large nationally representative population. Dietary factors were assessed by 24-h recalls. Two empirical dietary indices for hyperinsulinaemia (EDIH) and insulin resistance (EDIR) were developed to identify food groups most predictive of biomarkers for hyperinsulinaemia (C-peptide and insulin) and insulin resistance (homoeostatic model assessment for insulin resistance), respectively. Deaths from date of the first dietary interview until 31 December 2015 were identified by the National Death Index. Multivariable hazard ratios (HR) and 95 % CI were calculated using Cox regression models. During a median follow-up of 7·8 years, 4904 deaths were documented among 40 074 participants. For EDIH, the multivariable-adjusted HR (comparing extreme quintiles) were 1·20 (95 % CI 1·09, 1·32, P-trend<0·001) for overall mortality and 1·41 (95 % CI 1·15, 1·74, P-trend = 0·002) for CVD mortality. Similar associations were observed for EDIR with HR of 1·18 (95 % CI 1·07, 1·29, P-trend < 0·001) for total and 1·35 (95 % CI 1·09, 1·67, P-trend = 0·005) for CVD mortality. After further adjustments for BMI and diabetes, these positive associations were somewhat attenuated. Our findings suggested that diets with higher insulinaemic potential are associated with increased risk of overall and CVD-specific mortality.
Participation Improves Collective Decisions (When It Involves Deliberation): Experimental Evidence From Kenya
Authors: Grillos Tara
Published: December 2021

Citizen participation in decision making has been widely lauded as a method for improving societal outcomes. Deliberative discussion, in particular, is believed to be more transformative than a mere aggregation of individual preferences, leading to more socially optimal decision making and behavior. I report the results from a laboratory experiment with 570 subjects in Nairobi, directly testing the effect of participation in deliberative group decision making on collective outcomes. Participants engage in a group task to earn compensation toward a shared group fund. Randomly assigned treatments vary according to whether decision making over the task to be completed involves: (1) external assignment; (2) non-deliberative majority voting; or (3) consensus through deliberative discussion. I find that deliberation improves collective decision making. Deliberation is also associated with changes in preferences, greater agreement with decision outcomes, and greater perceived fairness. Evidence for behavior change is weaker, but there is some support for further research into the relationship between preference change and behavior change.
Comparison of culture-dependent and culture-independent techniques in the detection of lactic acid bacteria biodiversity and dynamics throughout the ripening process: The case of Turkish artisanal Tulum cheese produced in the Anamur region
Authors: Demirci Talha , Oraç Aysun , Aktaş Kübra , Dertli Enes , Akyol Ismail , Akın Nihat
Published: December 2021

Our objective was to analyze the diversity of the microbiota over 180 d of ripening of eight batches of artisanal goatskin Tulum cheeses by culture-dependent and culture-independent (PCR-DGGE) methods. V3 region of the bacterial 16S rRNA gene was amplified with the PCR after direct DNA isolation from the cheese samples. Nine different species and five genera were determined by culturing, while 11 species were identified in the PCR-DGGE technique. This diversity revealed the uniqueness of artisanal cheese varieties. The dominant genera in all the cheese samples were composed of Enterococcus species. The culture-dependent method revealed five genera (Enterococcus,Bacillus,Lactococcus,Lactobacillus, Sphingomonas) while three genera (Enterococcus, Streptococcus, Lactococcus) were detected in the culture-independent method. It was concluded that combining the two methods is important for characterizing the whole microbiota of the Tulum cheese varieties produced in the Anamur region.