bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hybrid Laparoscopic Versus Open Pancreatoduodenectomy. A Meta‐Analysis
Authors: Vladimirov Miljana , Bausch Dirk , Stein Hubert J. , Keck Tobias , Wellner Ulrich 
Published: January 2022

AbstractIntroductionHybrid laparoscopic techniques have been proposed as a good transition from open to complete minimally invasive approach especially in complex surgical procedures. This meta‐analysis aimed to compare the outcomes of hybrid laparoscopic pancreatoduodenectomy versus open pancreatoduodenectomy.MethodsA systematic literature research was performed according to PRISMA guidelines. A broad search strategy with terms “laparoscopy” and “pancreatoduodenectomy” was used. Included studies were analyzed by quantitative meta‐analysis using the metafor package for R software.ResultsOf 655 identified articles, 627 were excluded and 28 articles fully assessed, including 14 comparative studies, 8 case series and 6 case reports. Extracted data included intraoperative variables and postoperative outcome parameters. The predefined inclusion criteria were met by 14 comparative studies, and 371 patients were pooled in the meta‐analysis. Hybrid laparoscopic pacreatoduodenectomy was associated with significantly longer operative time (I2 0%, p = 0,01, Mean HPD 494,6 min, Mean OPD 421,6 min, WMD 67 min, 95% CI 14–120 min). For all other postoperative outcome parameters, no statistically significant differences were found. A nonsignificant reduction in intraoperative transfusion rate (I2 20%, p = 0,2, proportion HPD 2%, proportion OPD 1,6%, OR 0,44, 95% CI 0,16–1,27) and blood loss (I2 95%, p = 0,1, Mean HPD 397,2 ml, Mean OPD 1017,8 ml, MD − 601 ml, 95% CI − 1311–108) was observed for hybrid pancreatoduodenectomy in comparison to open surgery.ConclusionsThis meta‐analysis demonstrates significantly increased operation time for hybrid laparoscopic compared to open pancreatoduodenectomy. Intraoperative variables as well as postoperative parameters and major morbidity were comparable for both techniques. Overall results of this meta‐analysis demonstrated the hybrid technique as a safe procedure in high‐volume centers offering aspects of a safe transition to fully laparoscopic pancreatoduodenectomy.
Sprachliche Charakteristika einer Psychotherapiesitzungssequenz aus der Perspektive unterschiedlicher Analysemethoden
Authors: Gumz Antje , Spranz-Fogasy Thomas 
Published: January 2022

Zusammenfassung
Hintergrund
Die sprachlichen Äußerungen sind ein zentrales Medium in Psychotherapien, d. h., Psychotherapie wirkt im Wesentlichen über die Sprache, über das Miteinanderreden. Angesichts der Bedeutung des sprachlichen Austauschs ist es relevant, die Mechanismen, über die Sprache in Psychotherapieprozessen wirkt, genauer zu verstehen. Die linguistische Psychotherapieforschung nutzt hierfür vielfältige Methoden.

Ziel der Arbeit
Vorliegender Beitrag demonstriert exemplarisch 2 mikroanalytische Ansätze.

Material und Methoden
Eine transkribierte Psychotherapiesitzungssequenz wurde aus Perspektive der psychodynamischen Theorie inhaltlich interpretiert und bezüglich sprachlicher Merkmale mithilfe von 2 Methoden mikroanalytisch beurteilt: Die verbalen Techniken (Fokus Therapeutenäußerungen) wurden mithilfe der Psychodynamischen Interventionsliste (PIL) geratet und eine detaillierte Konversationsanalyse (Fokus Dialog) erfolgte.

Ergebnisse
Analysen mit der PIL zeigten, dass im Sitzungsausschnitt überwiegend die Techniken „Bedeutung hinzufügen“ und „Wiederholen, Umschreiben, Zusammenfassen“ verwendet wurden. Thematisch wurde besonders auf den „Vater“ Bezug genommen, gefolgt von der „Therapeutin“. Der zeitliche Bezug lag schwerpunktmäßig in der „Vergangenheit“. Die Gesprächsanalyse rekonstruiert, dass der Wechsel auf die Erlebensebene die Therapiesituation selbst in den Fokus rückt. Mithilfe sequenzieller Handlungszwänge werden extratherapeutische Konstellationen in der Vergangenheit und therapeutische Gegenwart kontrastierbar sowie intersubjektiv bearbeitbar gemacht.

Schlussfolgerung
Die eigene Sprache und den Dialog im Therapieprozess zu beobachten, kann für Therapeuten aufschlussreiche Erkenntnisse über Folgen und Voraussetzungen eigener Interventionen liefern. Forschungen an der interdisziplinären Schnittstelle von Psychotherapie und Linguistik sind lohnenswert.
Stochastic deep collocation method based on neural architecture search and transfer learning for heterogeneous porous media
Authors: Guo Hongwei , Zhuang Xiaoying , Chen Pengwan , Alajlan Naif , Rabczuk Timon 
Published: January 2022

AbstractWe present a stochastic deep collocation method (DCM) based on neural architecture search (NAS) and transfer learning for heterogeneous porous media. We first carry out a sensitivity analysis to determine the key hyper-parameters of the network to reduce the search space and subsequently employ hyper-parameter optimization to finally obtain the parameter values. The presented NAS based DCM also saves the weights and biases of the most favorable architectures, which is then used in the fine-tuning process. We also employ transfer learning techniques to drastically reduce the computational cost. The presented DCM is then applied to the stochastic analysis of heterogeneous porous material. Therefore, a three dimensional stochastic flow model is built providing a benchmark to the simulation of groundwater flow in highly heterogeneous aquifers. The performance of the presented NAS based DCM is verified in different dimensions using the method of manufactured solutions. We show that it significantly outperforms finite difference methods in both accuracy and computational cost.
Instructing item-specific switch probability: expectations modulate stimulus–action priming
Authors: Jargow Janine , Wolfensteller Uta , Pfeuffer Christina U. , Ruge Hannes 
Published: January 2022

AbstractBoth active response execution and passive listening to verbal codes (a form of instruction) in single prime trials lead to item-specific repetition priming effects when stimuli re-occur in single probe trials. This holds for task-specific classification (stimulus–classification, SC priming, e.g., apple–small) and action (stimulus–action, SA priming, e.g., apple–right key press). To address the influence of expectation on item-specific SC and SA associations, we tested if item-specific SC and SA priming effects were modulated by theinstructedprobability of re-encountering individual SC or SA mappings (25% vs. 75%instructedswitch probability). Importantly, the experienced item-specific switch probability was always 50%. In Experiment 1 (N = 78), item-specific SA/SC switch expectations affected SA, but not SC priming effects exclusively following active response execution. Experiment 2 (N = 40) was designed to emphasize SA priming by only including item-specific SC repetitions. This yielded stronger SA priming for 25% vs. 75% expected switch probability, both following response execution as in Experiment 1 and also following verbally coded SA associations. Together, these results suggest that SA priming effects, that is, the encoding and retrieval of SA associations, is modulated by item-specific switch expectation. Importantly, this expectation effect cannot be explained by item-specific associative learning mechanisms, as stimuli were primed and probed only once and participants experienced item-specific repetitions/switches equally often across stimuli independent of instructed switch probabilities. This corroborates and extends previous results by showing that SA priming effects are modulated by expectation not only based on experienced item-specific switch probabilities, but also on mere instruction.
Survival, functional outcome and satisfaction of first revision total knee arthroplasty at a mean eleven-year follow-up
Authors: Hecker Andreas , Pütz Hans-Jürg A. , Wangler Sebastian , Klenke Frank M. 
Published: January 2022

Abstract
Purpose
Providing long-term outcome data after rTKA and compare one- versus two-stage and septic versus aseptic revisions.

Methods
This study represents a single-center retrospective study of first rTKAs performed for any reason with a final follow-up of a minimum of five years. Outcome parameters included stability assessment ROM, radiologic assessment, HSS score, KSS score, OKS score, EQ-5D-3L and VAS. 44 patients were included in the study. Subgroups analysis of one- versus two-stage revision and septic versus aseptic revision was performed.

Results
The leading causes of rTKA in this mean 11 year follow-up study were aseptic loosening (36%) and periprosthetic joint infection (27%). At the final follow-up, there was a 89% survivorship of the implants. Patients showed a ROM of 114 ± 13°, HSS score of 78 ± 12, KKS objective score of 77 ± 16, KSS expectation and satisfaction score of 32 ± 11, KSS functional activity score of 50 ± 20, OKS of 30 ± 9, VAS of 53 ± 25 and EQ-5D index of 0.649. Functional outcome scores were not significantly altered in the analyzed subgroups.

Conclusions
In our 11 years follow-up, we obtained 89% implant survivorship. Measurements regarding functional outcome and pain showed results in the medium range of the respective scores, while patient satisfaction lay in the upper third. No significant differences in outcome scores between one- and two-stage revisions and septic versus aseptic revisions were observed.
Level of Evidence Level III, retrospective cohort study.
Problems with SZZ and features: An empirical study of the state of practice of defect prediction data collection
Authors: Herbold Steffen , Trautsch Alexander , Trautsch Fabian , Ledel Benjamin 
Published: January 2022

Abstract
Context
The SZZ algorithm is the de facto standard for labeling bug fixing commits and finding inducing changes for defect prediction data. Recent research uncovered potential problems in different parts of the SZZ algorithm. Most defect prediction data sets provide only static code metrics as features, while research indicates that other features are also important.

Objective
We provide an empirical analysis of the defect labels created with the SZZ algorithm and the impact of commonly used features on results.

Method
We used a combination of manual validation and adopted or improved heuristics for the collection of defect data. We conducted an empirical study on 398 releases of 38 Apache projects.

Results
We found that only half of the bug fixing commits determined by SZZ are actually bug fixing. If a six-month time frame is used in combination with SZZ to determine which bugs affect a release, one file is incorrectly labeled as defective for every file that is correctly labeled as defective. In addition, two defective files are missed. We also explored the impact of the relatively small set of features that are available in most defect prediction data sets, as there are multiple publications that indicate that, e.g., churn related features are important for defect prediction. We found that the difference of using more features is not significant.

Conclusion
Problems with inaccurate defect labels are a severe threat to the validity of the state of the art of defect prediction. Small feature sets seem to be a less severe threat.
Organizational Structure for the IT Department: Profit Center or Cost Center?
Authors: Vithayathil Joseph , Choudhary Vidyanand 
Published: January 2022

AbstractWhy do some firms organize their IT departments as profit centers whereas other firms organize IT as a cost center? These commonly employed organizational structures are characterized by information asymmetry and decision rights afforded to the IT department. The complexity of IT and its ongoing rapid evolution lead to information asymmetry where the IT department has private information about technology and cost, and the consuming departments have private information about demand. Under the cost center organizational structure, the firm sets the quality and number of IT services offered by the IT department. Whereas under a profit center structure, the IT department makes decisions on quality, price and variety of IT services. We find that the quality of IT services under the cost center decreases with greater uncertainty in demand for IT services. We also find that the cost center structure can offer higher quality IT services than the profit center structure, and consumption of IT services can be higher under the profit center structure. The preferred organizational structure does not always provide greater variety of IT services than the alternate structure. The cost center is preferred when the marginal cost of IT services is sufficiently low, or the fixed cost of quality is sufficiently high.
Post-warming embryo morphology is associated with live birth: a cohort study of single vitrified-warmed blastocyst transfer cycles
Authors: Allen Meagan , Hale Lyndon , Lantsberg Daniel , Kieu Violet , Stevens John , Stern Catharyn , Gardner David K. , Mizrachi Yossi 
Published: January 2022

Abstract
Purpose
This study aims to examine whether blastocyst morphology post-warming correlates with live birth.

Methods
In this cohort study, morphological characteristics post-warming were reviewed in all single vitrified-warmed blastocyst transfer cycles performed between November 2016 and May 2017. Immediately before transfer, the degree of blastocoel re-expansion was graded as A, fully expanded; B, partially expanded ≥ 50%; C, partially expanded < 50%; and D, collapsed. The degree of post-warming cell survival was graded on a scale of 50 to 100% and was then classified into 4 groups: very low 50–70%, low 71–80%, moderate 81–90%, and high 91–100%.

Results
Overall, 612 cycles were reviewed, of which 196 included PGT-A tested embryos. The live birth rate (LBR) increased from 11.4% in the collapsed blastocysts group to 38.9% in the post-warming full re-expansion group (p < 0.001) and from 6.5% for blastocysts with a very low cell survival rate to 34.7% for blastocysts with high cell survival rate (p = 0.001). LBR was 6.7% for blastocysts with the worst post-warming morphological characteristics, namely, collapsed with very low cell survival rate. On multivariate analyses, partial blastocyst re-expansion ≥ 50%, full re-expansion, and high cell survival rate remained significantly associated with live birth, after controlling for female age, pre-vitrification morphological grading, and PGT-A. A sub-analysis of cycles using PGT-A tested embryos showed similar results.

Conclusion
Post-warming re-expansion and high cell survival rate are associated with higher LBR in euploid and untested blastocysts. However, embryos with poor post-warming morphology still demonstrate a considerable probability of live birth, and they should not be discarded.
Numerical aspects of a Godunov-type stabilization scheme for the Boltzmann transport equation
Authors: Noei Maziar , Luckner Paul , Linn Tobias , Jungemann Christoph 
Published: January 2022

AbstractWe discuss the numerical aspects of the Boltzmann transport equation (BE) for electrons in semiconductor devices, which is stabilized by Godunov’s scheme. The k-space is discretized with a grid based on the total energy to suppress spurious diffusion in the stationary case. Band structures of arbitrary shape can be handled. In the stationary case, the discrete BE yields always nonnegative distribution functions and the corresponding system matrix has only eigenvalues with positive real parts (diagonally dominant matrix) resulting in an excellent numerical stability. In the transient case, this property yields an upper limit for the time step ensuring the stability of the CPU-efficient forward Euler scheme and a positive distribution function. Similar to the Monte-Carlo (MC) method, the discrete BE can be solved in time together with the Poisson equation (PE), where the time steps for the PE are split into shorter time steps for the BE, which can be performed at minor additional computational cost. Thus, similar to the MC method, the transient approach is matrix-free and the solution of memory and CPU intensive large systems of linear equations is avoided. The numerical properties of the approach are demonstrated for a silicon nanowire NMOSFET, for which the stationary I–V characteristics, small-signal admittance parameters and the switching behavior are simulated with and without strong scattering. The spurious damping introduced by Godunov’s (upwind) scheme is found to be negligible in the technically relevant frequency range. The inherent asymmetry of the upwind scheme results in an error for very strong scattering that can be alleviated by a finer grid in transport direction.
Risk Factors for Dual Burden of Severe Maternal Morbidity and Preterm Birth by Insurance Type in California
Authors: El Ayadi Alison M. , Baer Rebecca J. , Gay Caryl , Lee Henry C. , Obedin-Maliver Juno , Jelliffe-Pawlowski Laura , Lyndon Audrey 
Published: January 2022

Abstract
Objectives
Among childbearing women, insurance coverage determines degree of access to preventive and emergency care for maternal and infant health. Maternal-infant dyads with dual burden of severe maternal morbidity and preterm birth experience high physical and psychological morbidity, and the risk of dual burden varies by insurance type. We examined whether sociodemographic and perinatal risk factors of dual burden differed by insurance type.

Methods
We estimated relative risks of dual burden by maternal sociodemographic and perinatal characteristics in the 2007–2012 California birth cohort dataset stratified by insurance type and compared effects across insurance types using Wald Z-statistics.

Results
Dual burden ranged from 0.36% of privately insured births to 0.41% of uninsured births. Obstetric comorbidities, multiple gestation, parity, and birth mode conferred the largest risks across all insurance types, but effect magnitude differed. The adjusted relative risk of dual burden associated with preeclampsia superimposed on preexisting hypertension ranged from 9.1 (95% CI 7.6–10.9) for privately insured to 15.9 (95% CI 9.1–27.6) among uninsured. The adjusted relative risk of dual burden associated with cesarean birth ranged from 3.1 (95% CI 2.7–3.5) for women with Medi-Cal to 5.4 (95% CI 3.5–8.2) for women with other insurance among primiparas, and 7.0 (95% CI 6.0–8.3) to 19.4 (95% CI 10.3–36.3), respectively, among multiparas.

Conclusions
Risk factors of dual burden differed by insurance type across sociodemographic and perinatal factors, suggesting that care quality may differ by insurance type. Attention to peripartum care access and care quality provided by insurance type is needed to improve maternal and neonatal health.
Seaweed as bioindicators of organic micropollutants polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs)
Authors: Zokm Gehan Mohamed El , Ismail Mona Mohamed , Okbah Mohamed Abd Elaziz 
Published: January 2022

AbstractThis study highlights the role of seaweed as important indicators of pollutants as they respond immediately to change in water chemistry and have high survival capabilities. Concentration and risk assessment of 13 polycyclic aromatic hydrocarbons (PAHs), as well as 20 organochlorine pesticides (OCPs), were examined in the seaweed from El-Mex Bay, Mediterranean Sea during spring and autumn seasons. The green alga Ulva compressa had a maximum ability to accumulate both PAHs and OCPs. In general, the content of the tested micropollutants in the collected seaweed is correlated to their species, morphology, concentration, and nature of pollutant. Naphthalene (NAP) and benzo a pyrene were the predominant polycyclic aromatic hydrocarbons in all species with mean concentrations of 68.57 and 56.14 ng g−1, respectively. The results of the current study showed that the contribution of the different fractions of PAHs from the total concentration was as follows: fossil-fuel derived polycyclic aromatic hydrocarbons (∑PAHF; 49.32%) > combustion-derived polycyclic aromatic hydrocarbons (PAHCOMB; 30.83%) > carcinogenic fractions (PAHCARC; 19.86%). A maximum PAHCARC (30.38%) was recorded in Ulva fasciata. For OCPs, the presence of 1,1-dichloro-2, 2-bis (4-chlorophenyl) ethane (DDD) (ND-27.8 ng g−1) rather than DDT; 1,1,1-trichloro-2, 2-bis (4-chlorophenyl) ethane was an indication for biotransformation involving the reductive dichlorination of DDT to more recalcitrant and toxic DDD. Endrin ketone has the highest mean hazard quotient (0.376). The cancer risk values of most PAHs and OCPs were in the range from 10−4 to 10−3 recommending precautionary measures. The results explained that the present algal species play a vital role in the uptake of organic pollutants and act as biomarkers for micropollutants in the ecosystem.
Long-term assessment of creep and water effects on tunnel lining loads in weak rocks using displacement-based direct back analysis: an example from northwest of Iran
Authors: Tarifard Abolfazl , Görög Péter , Török Ákos 
Published: January 2022

Abstract
The time-dependent stability of tunnels is an important and challenging topic, mainly when the tunnel is excavated in incompetent and weak rocks. The creep property of rock is one of the crucial mechanical properties of weak rock and the main factor affecting the long-term stability of rock masses. Also, water as an important environmental factor influences both the short-term and long-term behavior of rocks and is one of the causes of geotechnical engineering disasters, such as tunnel collapse, slope sliding, surface subsidence, etc. In this research, the effects of rock’s creep behavior and underground water on the long-term stability of the Shibli tunnels were analyzed. Geological maps and reports of Shibli tunnels show a highly jointed condition in the surrounding rocks which have been crushed by two orogenic stages. The Burger-creep visco-plastic model was used to simulate the tunnel host rock creep behavior. The model's parameters were adopted based on the displacement-based direct back analysis technique using a univariate optimization algorithm. In addition, the influence of underground water is assessed under the condition of the varying water table. Support capability diagrams were used to evaluate the loading created on the tunnel’s permanent lining due to the creep behavior of rock mass and underground water. This study suggests that the weak rock's creep behavior and underground water significantly affect the time-dependent stability of tunnels. Results show that the induced stresses due to the rock's creep behavior and underground water are more considerable in the tunnel spring-line. Also, the increasing 20 m in the water table approximately decreases ten years of tunnel lining stability time at the fault zone.

Article highlights

Rocks creep behavior and underground water significantly affect the time-dependent stability of tunnels in weak rocks.

Displacement-based direct back analysis using a univariate optimization algorithm was used to determine the CVISC model’s properties.

Increasing 20 m in the water table approximately decreases ten years of tunnel lining stability time at the fault zone.
Adiabatic theorem in the thermodynamic limit: Systems with a gap in the bulk
Authors: Henheik Joscha , Teufel Stefan 
Published: January 2022

AbstractWe prove a generalised super-adiabatic theorem for extended fermionic systems assuming a spectral gap only in the bulk. More precisely, we assume that the infinite system has a unique ground state and that the corresponding Gelfand–Naimark–Segal Hamiltonian has a spectral gap above its eigenvalue zero. Moreover, we show that a similar adiabatic theorem also holds in the bulk of finite systems up to errors that vanish faster than any inverse power of the system size, although the corresponding finite-volume Hamiltonians need not have a spectral gap.