bluuebunny/crossref_metadata_2025_split huggingface dataset:
The operation and maintenance governance of microservices architecture systems: A systematic literature review
Authors: Wang Lu , Jiang Yu Xuan , Wang Zhan , Huo Qi En , Dai Jie , Xie Sheng Long , Li Rui , Feng Ming Tao , Xu Yue Shen , Jiang Zhi Ping 
Published: February 2022

AbstractDue to its development agility, continuous delivery, scalability and other characteristics, the microservice architecture systems (MASs) have provided complex business functions to hundreds of millions of users in many application fields. The operation and maintenance governance for a large number of microservices with complex relationships is crucial to ensuring the stability and reliability of an MAS. Although this research field has received certain attention and produced some innovative results, there is a lack of systematic reviews covering the different aspects of it. In this context, the central objective of this study is to carry out a systematic literature review (SLR) in this field, in an attempt to review existing issues, discuss the main trends, and share the findings with the academia. As a result, we start from more than 500 scientific papers published from 2009 to 2021 and extract 144 most significant papers, identify that the main research directions of this field include load balancing, fault detection, and autoscaling. Subsequently, we provide a comprehensive description of these research directions, discuss them in particular detail. We also determine limitations of current work and discuss new directions worth exploring in the future. Consequently, the outcomes will assist professionals and experts in the industry as well as academic researchers to focus more on operation and maintenance governance of MASs and further improve the relevant methods and theoretical systems in this field.
Computational Optimizing the Electromagnetic Wave Reflectivity of Double‐Layered Polymer Nanocomposites
Authors: Wei Linfeng , Ma Jianzhong , Ma Li , Zhao Chongxiang , Xu Menglong , Qi Qing , Zhang Wenbo , Zhang Lei , He Xiang , Park Chul B. 
Published: February 2022

AbstractDouble‐layered absorption‐dominated electromagnetic interference (EMI) shielding composites are highly desirable to prevent secondary electromagnetic wave pollution. However, it is a tremendous challenge to optimize the shielding performance via the trial‐and‐error method due to the low efficiency. Herein, a novel approach of computation‐aided experimental design is proposed to efficiently optimize the reflectivity of the double‐layered composites. A normalized input impedance (NII) method is presented to calculate the electromagnetic wave reflectivity of multilayered EMI shielding composites. The calculated results are a good match with the experimental results. Then, the NII method is utilized to design polyvinylidene difluoride/MXene/carbon nanotube (PVDF/MXene/CNT) composites. According to the optimization of the NII method, the prepared PVDF/MXene/CNT composite has an ultralow reflectivity of 0.000057, which outperforms that reported in current work and satisfies the requirement of electromagnetic wave absorbing material. Additionally, its average EMI shielding effectiveness is 30 dB, demonstrating that PVDF/MXene/CNT composite simultaneously achieves shielding and absorption. The ultralow reflection mechanism can be ascribed to the ideal impedance match. Both the PVDF/MXene and the PVDF/CNT layers can attenuate electromagnetic energy, which subverts the traditional cognition of double‐layered absorption‐dominated EMI shielding composites. The NII method opens a way for the practical fabrication of double‐layered absorption‐dominated EMI shielding composites.
Retracted: Predicting the compressive strength of modified recycled aggregate concrete
Authors: Yang Cuina , Feng Hongwei , Esmaeili‐Falak Mahzad 
Published: February 2022

AbstractReuse and recycling of construction wastes effectively prevent further destruction of the environment and nature due to the construction industry. One of the conventional methods is the reapplication of recycled aggregates (RAs) in concrete mix design and construction. Compressive strength (CS) is a considerable representation of the mechanical properties of recycled aggregate concrete (RAC). The present study is divided into two parts of experimental and predicting. In the laboratory studies phase, RA was used with 100% replacement. Due to the proven defects in RAC, glass fibers and silica fume (variables) have been used to compensate for these defects. Different mixing designs were used to construct concrete samples, and then the CS of each specimen was measured in the laboratory. Afterward, these data were used as training and testing in various conventional, ensembled and hybrid models as the tree‐based learning algorithms, rules, Lazy‐learning Algorithms, Functions, and Meta classifiers. Considering the applied performance statistical criteria (, root mean squared error, mean absolute error, and mean absolute percentage error), all models have provided excellent and acceptable results, which the precision of the multilayer perceptron single model and additive regression‐random Forest hybrid model have the best agreement with measured values of CS of RAC.
Exploring Trends in Abundance of Young‐of‐the‐Year and Age‐1 Atlantic Croaker, Black Drum, Spot, and Weakfish in Relation to Salinity, Temperature, and Large‐Scale Climatic Signals in a Mid‐Atlantic Estuary
Authors: Mathews Joseph A. , Hale Edward A. , Oleynik Haley A. , Clark John H. , Park Ian A. , Greco Michael J. , Petrone Christopher J. 
Published: February 2022

AbstractAtlantic Croaker Micropogonias undulatus, Black Drum Pogonias cromis, Spot Leiostomus xanthurus, and Weakfish Cynoscion regalis have shown species‐specific, varying trends in abundance despite general declines in commercial landings throughout the Delaware River estuary. Identifying how environmental factors and climatic processes affect fishes at multiple life stages is needed to enhance the precision of regulatory actions for managed species. Species‐, area‐, and age‐specific indices were compared with depth, salinity, temperature, the Atlantic Multidecadal Oscillation (AMO), and the North Atlantic Oscillation (NAO) to explore potential relationships as well as temporal and spatial parameters. Our results demonstrate that station (15 indices), salinity (14 indices), the AMO and NAO (13 indices each), and depth and temperature (12 indices each) served as important components for models of abundance for 17 species‐, age‐, and area‐specific combinations from 1991 to 2016. Significant time series trends were detected in six of the modeled indices of abundance, including baywide indices of age‐1 Weakfish (decline) and age‐0 Atlantic Croaker (increase); age‐0 Atlantic Croaker (increase) and Weakfish (decline) in Delaware; and age‐1 Spot (decline) and Weakfish (increase) in Delaware. Our results demonstrate how multiple fixed‐station surveys can be combined to quantitatively assess environmental and climatic effects correlated with species‐, age‐, and area‐specific levels of abundance, suggesting that climatic signals are affecting smaller‐scale environmental variables that in turn affect relative abundance.
The sustainability of multinational enterprises' pandemic‐induced social innovation approaches
Authors: Peerally Jahan Ara , De Fuentes Claudia , Santiago Fernando , Zhao Shasha 
Published: February 2022

AbstractThe COVID‐19 pandemic has prompted an unprecedented reaction in several multinational enterprises (MNEs). These MNEs have adopted social innovation approaches to meet the needs of vulnerable societal groups by swiftly innovating their business models; drastically changing their product offerings and customer bases; and producing COVID‐19 necessities. These approaches have alleviated some key pandemic‐induced social challenges related to health and sanitation. In this perspective article, we use secondary sources of information to present and exemplify the various types of MNE pandemic‐induced social innovation approaches. We open the discussion on whether these approaches are transitory in nature or whether they can and should be sustained in the long‐term, given the right incentives to these MNEs. We conclude by redefining MNEs' social innovation and by suggesting avenues for scholars, practitioners, policymakers, and educators to support this momentum in MNEs which we argue, if sustainable, can be fruitful for addressing other pressing grand challenges such as climate change, food security, poverty, and inequality.
Governance, foreign aid, and Chinese foreign direct investment
Authors: Fon Roger , Alon Ilan 
Published: February 2022

AbstractThis article examines how Chinese foreign aid interacts with the quality of the host country's governance in shaping Chinese state‐owned enterprises' (CSOEs') foreign direct investment (FDI) in Africa. By analyzing the firm‐level greenfield FDI data of CSOEs between 2003 and 2014 and distinguishing between China's official development assistance and less concessional forms of Chinese foreign aid, we reveal two main findings. First, the quality of the host country's governance negatively affects CSOEs' FDI. Second, other official aid and loans from China negatively moderate the relationship between the quality of the host country's governance and FDI by CSOEs. Specifically, the tendency for CSOEs to invest in locations with weak governance increases when their investments are integrated with less concessional forms of Chinese foreign aid in the form of other official flows and loans. Our results are robust to alternative measures of the governance and different methodological approaches. The article challenges the traditional notion of institutional theory which assumes a positive relationship between governance quality and FDI attraction.
Hyperbaric oxygen therapy for the treatment of perianal fistulas in 20 patients with Crohn's disease: Results of the HOT‐TOPIC trial after 1‐year follow‐up
Authors: Lansdorp Corine A. , Buskens Christianne J. , Gecse Krisztina B. , Löwenberg Mark , Stoker Jaap , Bemelman Willem A. , D’Haens Geert R. A. M. , van Hulst Rob A. 
Published: February 2022

AbstractBackgroundPreviously published short‐term results (week 16) of this trial showed a significant improvement in clinical, radiologic and biochemical outcomes in Crohn's disease patients with therapy‐refractory perianal fistulas after treatment with hyperbaric oxygen therapy.ObjectiveTo assess the long‐term (week 60) efficacy, safety and feasibility of hyperbaric oxygen therapy in perianal fistula in Crohn's disease.MethodsCrohn's disease patients with high perianal fistula(s) failing conventional treatment >6 months were included. Exclusion criteria were presence of a stoma, rectovaginal fistula(s) and recent changes in treatment regimens. Patients received 40 hyperbaric oxygen sessions and outcomes were assessed at week 16 and week 60.ResultsTwenty patients were included (median age 34 years). At week 16, median scores of the perianal disease activity index and modified Van Assche index (co‐primary outcomes) decreased from 7.5 (95% CI 6–9) to 4 (95% CI 3–6, p < 0.001) and 9.2 (95% CI 7.3–11.2) to 7.3 (95% CI 6.9–9.7, p = 0.004), respectively. At week 60, the respective scores remained significantly lower than baseline: 4 (95% CI 3–7, p < 0.001) and 7.7 (95% CI 5.2–10.2, p = 0.003). Perianal disease activity index score of 4 or less (representing inactive perianal disease) was observed in 13 patients at week 16 and 12 patients at week 60. Using fistula drainage assessment, 12 and 13 patients showed a clinical response at week 16 and 60, respectively, and clinical remission was achieved in four patients for both time points. At week 16, a statistically significant biochemical improvement (C‐reactive protein and faecal calprotectin levels) was found, but this effect was no longer significant at week 60.ConclusionsThe clinical and radiologic improvement of perianal fistula in Crohn's disease, that was found at week 16 after treatment with hyperbaric oxygen therapy, is maintained at 1‐year follow‐up.
Use of antimicrobial impregnated calcium sulphate beads in the surgical management of mandibular osteomyelitis in an 8‐year‐old huacaya alpaca
Authors: Po Eleonora , Allen Matthew James , Whitelock Richard G. , Elsayed Sara Hassouna 
Published: February 2022

AbstractAn 8‐year‐old male huacaya alpaca presented for a left mandibular swelling that was not responsive to antimicrobial treatment. A computed tomography scan was obtained, confirming the presence of a lytic bone destruction and primary mandibular osteomyelitis. Surgical debridement of the area was performed and the surgical site was packed with antibiotic‐loaded calcium sulphate beads to provide local antibiotic delivery and support new bone formation. The surgical intervention and implantation of the beads were well tolerated, and no postsurgical issues were reported over the following 12 months. A follow‐up computed tomography scan was performed 14 months after surgery and this revealed near‐complete restoration of bone architecture and no evidence of active bone destruction. A combination of surgical debridement and antibiotic‐loaded calcium sulphate beads is a viable and cost‐reasonable option for the treatment of osteomyelitis in camelids.
Budd–Chiari syndrome secondary to caudal vena cava obstruction by vascularly invasive lymphoma in a cat
Authors: Whitlock James , Alexander Akash , Williams Claire , Griffin Sally , Allerton Fergus 
Published: February 2022

AbstractA 2‐year‐old female neutered domestic shorthair cat presented with ascites following a 2‐week history of hyporexia and moderate weight loss. Sonographic assessment of the abdominal cavity identified a hepatic mass in close association with the caudal vena cava that contained an intraluminal structure. Computed tomography confirmed the hepatic mass in the right craniodorsal aspect of the liver with invasion of the posthepatic caudal vena cava and consequent vessel occlusion. This congestion caused transudation of fluid from the vasculature, resulting in the observed ascites (Budd–Chiari syndrome). Cytology from fine‐needle aspirates of the mass confirmed a diagnosis of high‐grade lymphoma. The patient was started on a high‐dose COP chemotherapy protocol, consisting of cyclophosphamide, vincristine and prednisolone. The patient showed a dramatic improvement in its clinical signs, with resolution of the ascites within 1 week of starting treatment. After a 12‐month period, chemotherapy was stopped, and 2.5 years after first diagnosis the patient has excellent quality of life with no current health problems related to its atypical lymphoma presentation.
Antemortem diagnosis of a doubly committed juxta‐arterial ventricular septal defect resulting in bacterial endocarditis and septic arthritis in a Holstein heifer
Authors: Lyons Rachael Ann H. , Simpson Katharine M. , Spraker Terry R. , Pierce Kursten V. 
Published: February 2022

AbstractA 20‐month‐old Holstein heifer presented for evaluation of progressive hindlimb lameness that was localised to the left coxo‐femoral joint, with development of a fever, tachycardia and bruxism. Radiographs and ultrasound of the coxo‐femoral joint were relatively unremarkable. An echocardiogram showed a static left‐to‐right shunting ventricular septal defect (initially diagnosed via echocardiogram 1 year prior) and a new filling defect within the pulmonary trunk suggestive of pulmonary valve endocarditis. Blood culture was positive for alpha‐haemolyticStreptococcusspp. Euthanasia was elected and postmortem examination confirmed ventricular septal defect, pulmonary valvular endocarditis, septic arthritis of the left coxo‐femoral joint and positive cultures for alpha‐haemolyticStreptococcusspp. This case describes endocarditis, bacteraemia and septic arthritis in a heifer with a ventricular septal defect. As with other species, cattle with ventricular septal defects should be considered susceptible and predisposed to complications such as endocarditis; this information may be useful for prognostication and management decisions.
A Toolbox to Study Tissue Mechanics In Vivo and Ex Vivo
Authors: Moreira Sofia , Espina Jaime A. , Saraiva Joana E. , Barriga Elias H. 
Published: February 2022

AbstractDuring vertebrate embryogenesis, tissues interact and influence each other’s development to shape an embryo. While communication by molecular components has been extensively explored, the role of mechanical interaction between tissues during embryogenesis is just starting to be revealed. Addressing mechanical involvement in morphogenesis has traditionally been challenging mainly due to the lack of proper tools to measure and modify mechanical environments of cells in vivo. We have recently used atomic force microscopy (AFM) to show that the migration of the Xenopus laevis cephalic neural crest cells is triggered by stiffening of the mesoderm, a tissue that neural crest cells use as a migratory substrate in vivo. Interestingly we showed that the activity of the planar cell polarity (PCP) pathway is required to mediate this novel mechanical interaction between two tissues. In this chapter, we share the toolbox that we developed to study the role of PCP signaling in mesoderm cell accumulation and stiffening (in vivo) as well as the impact of mesoderm stiffness in promoting neural crest cell polarity and migration (ex vivo). We believe that these tools can be of general use for investigators interested in addressing the role of mechanical inputs in vivo and ex vivo.
The constraints of post-quantum classical gravity
Authors: Oppenheim Jonathan , Weller-Davies Zachary 
Published: February 2022

Abstract
We study a class of theories in which space-time is treated classically, while interacting with quantum fields. These circumvent various no-go theorems and the pathologies of semi-classical gravity, by being linear in the density matrix and phase-space density. The theory can either be considered fundamental or as an effective theory where the classical limit is taken of space-time. The theories have the dynamics of general relativity as their classical limit and provide a way to study the back-action of quantum fields on the space-time metric. The theory is invariant under spatial diffeomorphisms, and here, we provide a methodology to derive the constraint equations of such a theory by imposing invariance of the dynamics under time-reparametrization invariance. This leads to generalisations of the Hamiltonian and momentum constraints. We compute the constraint algebra for a wide class of realisations of the theory (the “discrete class”) in the case of a quantum scalar field interacting with gravity. We find that the algebra doesn’t close without additional constraints, although these do not necessarily reduce the number of local degrees of freedom.
Periodic Solutions to Second-Order Nonlinear Differential Equations in Banach Spaces
Authors: Ariza-Ruiz David , Garcia-Falset Jesús 
Published: February 2022

AbstractIn this article, we deal with the existence of solutions for the following second-order differential equation: $$\begin{aligned} \left\{ \begin{aligned}&u''(t)=f(t,u(t))+h(t)\\&u(a)-u(b)= u'(a)-u'(b)=0, \end{aligned}\right. \end{aligned}$$

u

′
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(
t
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=
f

(
t
,
u

(
t
)

)

+
h

(
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(
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-
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=

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-

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(
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=
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where $${\mathbb {B}}$$
B
is a reflexive real Banach space, $$f:[a,b]\times {\mathbb {B}}\rightarrow {\mathbb {B}}$$

f
:
[
a
,
b
]
×
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→
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is a sequentially weak–strong continuous mapping, and $$h:[a,b]\rightarrow {\mathbb {B}}$$

h
:
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→
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is a continuous function on $${\mathbb {B}}.$$

B
.

The proofs are obtained using a recent generalization of the well-known Bolzano–Poincaré–Miranda theorem to infinite-dimensional Banach spaces. In the last section, we present three examples of application of the general result.
Virtual non-contrast images calculated from dual-energy CT shoulder arthrography improve the detection of intraarticular loose bodies
Authors: Stern Christoph , Graf Dimitri N. , Bouaicha Samy , Wieser Karl , Rosskopf Andrea B. , Sutter Reto 
Published: February 2022

Abstract
Objective
This study aims to evaluate the image quality of virtual non-contrast (VNC) images calculated from dual-energy CT shoulder arthrography (DECT-A) and their ability to detect periosteal calcifications and intraarticular loose bodies.

Materials and methods
In 129 shoulders of 123 patients, DECT arthrography (80 kV/140 kV) was performed with diluted iodinated contrast material (80 mg/ml). VNC images were calculated with image postprocessing. VNC image quality (1 = worst, 5 = best), dose parameters, and CT numbers (intraarticular iodine, muscle, VNC joint fluid density) were assessed. Image contrast (iodine/muscle) and percentage of iodine removal were calculated. Two independent readers evaluated VNC and DECT-A images for periosteal calcifications and intraarticular loose bodies, and diagnostic confidence (1 = low, 4 = very high) was assessed.

Results
VNC images (129/129) were of good quality (median 4 (3–4)), and the mean effective dose of DECT-A scans was 2.21 mSv (± 1.0 mSv). CT numbers of iodine, muscle, and VNC joint fluid density were mean 1017.6 HU (± 251.6 HU), 64.6 HU (± 8.2 HU), and 85.3 HU (± 39.5 HU), respectively. Image contrast was mean 953.1 HU (± 251 HU) on DECT-A and 31.3 HU (± 32.3 HU) on VNC images. Iodine removal on VNC images was 91% on average. No difference was observed in the detection of periosteal calcifications between VNC (n = 25) and DECT-A images (n = 21) (p = 0.29), while the detection of intraarticular loose bodies was superior on VNC images (14 vs. 7; p = 0.02). Diagnostic confidence was higher on VNC images for both periosteal calcifications (median 3 (3–3) vs. 3 (3–3); p = 0.009) and intraarticular loose bodies (median 3 (3–4) vs. 3 (3–3); p < 0.001).

Conclusion
VNC images from DECT shoulder arthrography are superior to DECT-A images for the detection of intraarticular loose bodies and increase the confidence in detecting periosteal calcifications.
Laparoscopic Minor Liver Resections for Hepatocellular Carcinoma in the Posterosuperior Segments Using the Rubber Band Technique
Authors: Tagaytay Theo Genesis , Han Dai Hoon , Chong Jae Uk , Hwang Hyeo Seong , Choi Gi Hong , Kim Kyung Sik 
Published: February 2022

AbstractBackgroundAlthough laparoscopic minor liver resections (LLR) of posterosuperior (PS) segments are technically challenging, several expert centers are increasingly performing this procedure. In the present study, we introduced novel techniques, including the rubber band traction method and positional changes, and compared surgical outcomes of LLR for hepatocellular carcinoma (HCC) located in PS segments with open minor liver resection (OLR).MethodsFrom January 2008 to August 2019, 113 patients underwent laparoscopic (n = 55) or open (n = 58) minor liver resections for single small HCCs (<5 cm) located in PS segments. Propensity score matching in a 1:1 ratio was conducted to minimize preoperative selection bias, and surgical outcomes were compared between the two groups.ResultsThere was no intraoperative mortality or reoperation in either group. One conversion to open surgery was necessary due to severe post‐operative adhesions. The matched LLR group compared to OLR had significantly shorter operative time (215.16 vs. 251.41 min, P = 0.025), lesser blood loss (218.11 vs. 358.92 mL, P = 0.046), lower complication rate (8.1% vs. 29.7%, P = 0.018), and shorter hospital stay (7.03 vs. 11.78 days, P = 0.001). Intraoperative transfusion, R0 resection, resection margin, 5‐year disease‐free survival and 5‐year overall survival were comparable.ConclusionOur standardized LLR provided improved short‐term outcomes and similar long‐term outcomes, when compared with OLR. With advanced techniques and accumulated surgical experience, LLR can be the first option for HCC in PS segments at expert centers.