bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of quality classes for material extrusion additive manufacturing using image processing
Authors: Oleff Alexander , Küster Benjamin , Overmeyer Ludger
Published: March 2024

Tools for implementing a systematic quality management are necessary for the use of material extrusion as an additive manufacturing process for products with high quality requirements. Well-defined quality classes are crucial for ensuring that the requirements for a product can be communicated transparently and that the existing properties can be evaluated. Furthermore, there is a lack of capable measurement equipment for the acquisition of process data during the production process. To address these challenges, the present paper introduces an image processing system that determines quality indicators for individual layers in terms of imperfect surface percentages and the number of imperfections. The central element of the hardware is an adaptive darkfield illumination, which leads to high-contrast images. In addition, five types of layer subareas are identified in a segmentation step. Unsupervised machine learning methods are then used to detect imperfections in each layer subarea. In the segmentation, the current layer can be distinguished from irrelevant image background regions with an F-measure of 0.981. For the layer-wise measurement of the quality indicators, relative measurement errors with standard deviations of 25 to 76.1% are found. After evaluating the capabilities of the image processing system, a proposal for limits of quality classes is derived by monitoring several material extrusion processes. For this purpose, three quality classes for each of the five layer subareas are deduced from the process scatter measured by the image processing system. The results are an important contribution to the industrialization of material extrusion in safety–critical areas such as medical technology or the aerospace industry.
A simple, efficient and versatile objective space algorithm for multiobjective integer programming
Authors: Dächert Kerstin , Fleuren Tino , Klamroth Kathrin
Published: March 2024

In the last years a multitude of algorithms have been proposed to solve multiobjective integer programming problems. However, only few authors offer open-source implementations. On the other hand, new methods are typically compared to code that is publicly available, even if this code is known to be outperformed. In this paper, we aim to overcome this problem by proposing a new state-of-the-art algorithm with an open-source implementation in . The underlying method falls into the class of objective space methods, i.e., it decomposes the overall problem into a series of scalarized subproblems that can be solved with efficient single-objective IP-solvers. It keeps the number of required subproblems small by avoiding redundancies, and it can be combined with different scalarizations that all lead to comparably simple subproblems. Our algorithm bases on previous results but combines them in a new way. Numerical experiments with up to ten objectives validate that the method is efficient and that it scales well to higher dimensional problems.
Minimal graphs of arbitrary codimension in Euclidean space with bounded 2-dilation
Authors: Ding Qi , Jost J. , Xin Y. L.
Published: March 2024

For any $$\Lambda >0$$

Λ
>
0

, let $$\mathcal {M}_{n,\Lambda }$$

M

n
,
Λ

denote the space containing all locally Lipschitz minimal graphs of dimension n and of arbitrary codimension m in Euclidean space $$\mathbb {R}^{n+m}$$

R

n
+
m

with uniformly bounded 2-dilation $$\Lambda $$
Λ
of their graphic functions. In this paper, we show that this is a natural class to extend structural results known for codimension one. In particular, we prove that any tangent cone C of $$M\in \mathcal {M}_{n,\Lambda }$$

M
∈

M

n
,
Λ

at infinity has multiplicity one. This enables us to get a Neumann–Poincaré inequality on stationary indecomposable components of C. A corollary is a Liouville theorem for M. For small $$\Lambda >1$$

Λ
>
1

(we can take any $$\Lambda <\sqrt{2}$$

Λ
<

2

), we prove that (i) for $$n\le 7$$

n
≤
7

, M is flat; (ii) for $$n>8$$

n
>
8

and a non-flat M, any tangent cone of M at infinity is a multiplicity one quasi-cylindrical minimal cone in $$\mathbb {R}^{n+m}$$

R

n
+
m

whose singular set has dimension $$\le n-7$$

≤
n
-
7

.
Greater Risk Taking in Cosmetic Surgery Acceptance and History: An Experimental and Computational Study
Authors: Jenkinson Paul Mark , Panagiotopoulou Elena , Koukoutsakis Athanasios , Fotopoulou Aikaterini
Published: March 2024

Cosmetic surgery is ever more affordable and accessible, but carries physical and psychological risks. Yet, no study to date has directly examined risk-taking behaviour under controlled conditions, beyond self-report and in relation to cosmetic surgery attitudes. We used the Balloon Analogue Risk Task and advanced computational modelling to measure decision-making behaviour and identify the latent parameters driving behaviour associated with cosmetic surgery attitudes in women with no cosmetic surgery history (N = 265) and a subsample of women with a cosmetic surgery history (N = 24). Risk taking was higher in women with greater acceptance and history of cosmetic surgery. Computational modelling revealed increased risk taking in women with greater acceptance of cosmetic surgery when decisions were made with greater knowledge of loss (risk) and not when the likelihood of loss was unknown (uncertainty). When women with greater acceptance of cosmetic surgery made decisions, they also placed less emphasis on possible losses (reduced loss aversion). Our findings suggest that women seeking cosmetic procedures may be less sensitive to losses and thus make more risky decisions. Greater emphasis should be placed on communicating potential losses rather than just the associated risks to women considering cosmetic procedures.

No Level Assigned This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.
Development and assessment of a loop ligation simulator for laparoscopic appendectomy
Authors: Zundel Sabine , Singer Noemi , Florinett Lena , Aichner Jonathan , Jhala Tobias , Szavay Philipp
Published: March 2024

Objective

Loop ligation of the appendix is a challenging surgical skill and well suited to be trained in a simulator. We aimed to develop an affordable and easy-to-build simulator and test its training effect.

Design and participants

Different materials were tested, and the best training modality was identified by researching the literature. The developed simulator training was tested on 20 surgical novices.

Results

A video was produced including an instruction on how to build the simulator and a step-by-step tuition on how to ligate the appendix. The Peyton approach was utilized to guide learners. Training with the simulator leads to reliable skill acquisition. All participants improved significantly in completing the task successfully during the structured learning.

Conclusion

We succeeded in developing a simulator for loop ligation of the appendix during laparoscopic appendectomy. Participants significantly improve in handling the loops. The transferability of the skill learned during simulation to the operating room will be subject of a follow-up study.
Identification and prediction of association patterns between nutrient intake and anemia using machine learning techniques: results from a cross-sectional study with university female students from Palestine
Authors: Qasrawi Radwan , Badrasawi Manal , Al-Halawa Diala Abu , Polo Stephanny Vicuna , Khader Rami Abu , Al-Taweel Haneen , Alwafa Reem Abu , Zahdeh Rana , Hahn Andreas , Schuchardt Jan Philipp
Published: March 2024

Purpose

This study utilized data mining and machine learning (ML) techniques to identify new patterns and classifications of the associations between nutrient intake and anemia among university students.

Methods

We employed K-means clustering analysis algorithm and Decision Tree (DT) technique to identify the association between anemia and vitamin and mineral intakes. We normalized and balanced the data based on anemia weighted clusters for improving ML models’ accuracy. In addition, t-tests and Analysis of Variance (ANOVA) were performed to identify significant differences between the clusters. We evaluated the models on a balanced dataset of 755 female participants from the Hebron district in Palestine.

Results

Our study found that 34.8% of the participants were anemic. The intake of various micronutrients (i.e., folate, Vit A, B5, B6, B12, C, E, Ca, Fe, and Mg) was below RDA/AI values, which indicated an overall unbalanced malnutrition in the present cohort. Anemia was significantly associated with intakes of energy, protein, fat, Vit B1, B5, B6, C, Mg, Cu and Zn. On the other hand, intakes of protein, Vit B2, B5, B6, C, E, choline, folate, phosphorus, Mn and Zn were significantly lower in anemic than in non-anemic subjects. DT classification models for vitamins and minerals (accuracy rate: 82.1%) identified an inverse association between intakes of Vit B2, B3, B5, B6, B12, E, folate, Zn, Mg, Fe and Mn and prevalence of anemia.

Conclusions

Besides the nutrients commonly known to be linked to anemia—like folate, Vit B6, C, B12, or Fe—the cluster analyses in the present cohort of young female university students have also found choline, Vit E, B2, Zn, Mg, Mn, and phosphorus as additional nutrients that might relate to the development of anemia. Further research is needed to elucidate if the intake of these nutrients might influence the risk of anemia.
Prevalence and temporal relationship of clinical co-morbidities in idiopathic dystonia: a UK linkage-based study
Authors: Bailey Grace A. , Rawlings Anna , Torabi Fatemeh , Pickrell W. Owen , Peall Kathryn J.
Published: March 2024

While motor and psychiatric phenotypes in idiopathic dystonia are increasingly well understood, a few studies have examined the rate, type, and temporal pattern of other clinical co-morbidities in dystonia. Here, we determine the rates of clinical diagnoses across 13 broad systems-based diagnostic groups, comparing an overall idiopathic dystonia cohort, and sub-cohorts of cervical dystonia, blepharospasm, and dystonic tremor, to a matched-control cohort. Using the SAIL databank, we undertook a longitudinal population-based cohort study (January 1st 1994–December 31st 2017) using anonymised electronic healthcare records for individuals living in Wales (UK), identifying those diagnosed with dystonia through use of a previously validated algorithm. Clinical co-morbid diagnoses were identified from primary health care records, with a 10% prevalence threshold required for onward analysis. Using this approach, 54,166 dystonia cases were identified together with 216,574 matched controls. Within this cohort, ten of the main ICD-10 diagnostic codes exceeded the 10% prevalence threshold over the 20-year period (infection, neurological, respiratory, gastrointestinal, genitourinary, dermatological, musculoskeletal, circulatory, neoplastic, and endocrinological). In the overall dystonia cohort, musculoskeletal (aOR: 1.89, aHR: 1.74), respiratory (aOR: 1.84; aHR: 1.65), and gastrointestinal (aOR: 1.72; aHR: 1.6) disorders had the strongest associations both pre- and post-dystonia diagnosis. However, variation in the rate of association of individual clinical co-morbidities was observed across the cervical, blepharospasm, and tremor dystonia groups. This study suggests an increased rate of specific co-morbid clinical disorders both pre- and post-dystonia diagnosis which should be considered during clinical assessment of those with dystonia to enable optimum symptomatic management.
A fast compilation of the VONA messages using a computer-assisted procedure
Authors: Bonfanti Pietro , Branca Stefano , Cassisi Carmelo , Coltelli Mauro , Prestifilippo Michele , Scollo Simona
Published: March 2024

Mt. Etna, in Italy, is one of the most active volcanoes in the world, producing several explosive events in recent years. Those eruptions form high eruption columns that often reach the top of the troposphere (and sometimes even the lower part of the stratosphere) and create several disruptions to air traffic, mainly to the Fontanarossa International Airport in Catania, which is about 20 NM (~ 37 km; NM = Nautical Miles) away from the summit craters and is located in the main wind direction. In Italy, the institution responsible for volcano monitoring is the Istituto Nazionale di Geofisica e Vulcanologia (INGV). In 2007, the INGV, Osservatorio Etneo (INGV-OE) in Catania was appointed as “State Volcano Observatory” (SVO) and, in 2014, sent the first Volcano Observatory Notice for Aviation (VONA) message. Since that moment, several VONA messages have been sent, mainly due to the high frequency of Etna activity. In order to facilitate and speed in the generation and the dispatch of the VONA messages, a computer-assisted procedure has been designed and built to help the work done by the volcanologist on duty and by the two shift workers of the 24/7 Control Room of INGV-OE. Consequently, information on the explosive activity can be quickly provided to the Volcanic Ash Advisory Center (VAAC) in Toulouse and national air traffic offices, reducing risks to aviation operations. In this work, we describe how the computer-assisted procedure works, addressing the main advantages and possible improvements. We retain that a similar approach could be easily applied to other volcano observatories worldwide.
Ultrasound-guided robotic surgical procedures: a systematic review
Authors: Pavone Matteo , Seeliger Barbara , Teodorico Elena , Goglia Marta , Taliento Cristina , Bizzarri Nicolò , Lecointre Lise , Akladios Cherif , Forgione Antonello , Scambia Giovanni , Marescaux Jacques , Testa Antonia C. , Querleu Denis
Published: March 2024

Introduction

Ultrasound has been nicknamed “the surgeon’s stethoscope”. The advantages of laparoscopic ultrasound beyond a substitute for the sense of touch are considerable, especially for robotic surgery. Being able to see through parenchyma and into vascular structures enables to avoid unnecessary dissection by providing a thorough assessment at every stage without the need for contrast media or ionising radiation. The limitations of restricted angulation and access within the abdominal cavity during laparoscopy can be overcome by robotic handling of miniaturised ultrasound probes and the use of various and specific frequencies will meet tissue- and organ-specific characteristics. The aim of this systematic review was to assess the reported applications of intraoperative ultrasound-guided robotic surgery and to outline future perspectives.

Methods

The study adhered to the PRISMA guidelines. PubMed, Google Scholar, ScienceDirect and ClinicalTrials.gov were searched up to October 2023. Manuscripts reporting data on ultrasound-guided robotic procedures were included in the qualitative analysis.

Results

20 studies met the inclusion criteria. The majority (53%) were related to the field of general surgery during liver, pancreas, spleen, gallbladder/bile duct, vascular and rectal surgery. This was followed by other fields of oncological surgery (42%) including urology, lung surgery, and retroperitoneal lymphadenectomy for metastases. Among the studies, ten (53%) focused on locating tumoral lesions and defining resection margins, four (15%) were designed to test the feasibility of robotic ultrasound-guided surgery, while two (10.5%) aimed to compare robotic and laparoscopic ultrasound probes. Additionally two studies (10.5%) evaluated the robotic drop-in probe one (5%) assessed the hepatic tissue consistency and another one (5%) aimed to visualize the blood flow in the splenic artery.

Conclusion

The advantages of robotic instrumentation, including ergonomics, dexterity, and precision of movements, are of relevance for robotic intraoperative ultrasound (RIOUS). The present systematic review demonstrates the virtue of RIOUS to support surgeons and potentially reduce minimally invasive procedure times.
Mycorrhization, root tip vitality and biomass of Fagus sylvatica, Picea abies and Pseudotsuga menziesii in monospecific and mixed combinations under water reduction and nitrogen addition
Authors: Audisio Michela , Sennhenn-Reulen Holger , Schott Ilka , Paligi Sharath Shyamappa , Mrak Klara , Hertel Dietrich , Leuschner Christoph , Polle Andrea
Published: March 2024

Key message

In mixed combinations, the negative impact of water reduction and N addition is mitigated for F. sylvatica, but not for conifers.

Insight into the responses of trees in mixed and monospecific cultivation to water scarcity and nitrogen (N) excess is necessary to recommend suitable tree mixtures for future European forests. Our aim was to investigate the impact of water reduction, N addition or water reduction + N addition in comparison with control (well-watered, no excess N) on mycorrhizal roots and biomass of three temperate forest species (Fagus sylvatica Fs, Picea abies Pa, and Pseudotsuga menziesii Pm) grown in monospecific (FsFs, PaPa, PmPm) and mixed combinations (PaFs, PmFs). We predicted the probability of the responses with a Bayesian approach. Mycorrhizal colonization declined marginally for P. menziesii in PmFs under water reduction. Under water reduction and N addition combined, we found a decline in root tip vitality of F. sylvatica in PaFs and of P. abies in PaPa. F. sylvatica shoot biomass declined under water reduction + N addition in the monospecific combination. P. abies and P. menziesii had lower root biomass in mixture with F. sylvatica under water reduction + N addition and under water reduction as single factor, respectively. With water reduction and N addition, P. menziesii performed better than P. abies in terms of biomass production. F. sylvatica had a growth advantage in mixture with conifers instead of conspecifics. These findings suggest that young trees show rapid and interspecific responses to species mixing and water + N availability. The selection of suitable tree species should, therefore, consider their interactive responses to changing abiotic factors.
Incidence of sodium–glucose cotransporter-2 inhibitor-associated perioperative ketoacidosis in surgical patients: a prospective cohort study
Authors: Seki Hiroyuki , Kuratani Norifumi , Shiga Toshiya , Iwasaki Yudai , Karita Kanae , Yasuda Kazuki , Yamamoto Natsuko , Nakanishi Yuko , Shigematsu Kenji , Kobayashi Kensuke , Saito Junichi , Kondo Ichiro , Yaida Nozomu , Watanabe Hidenobu , Higashi Midoriko , Shirasaka Tetsuro , Doshu-Kajiura Akira , Edanaga Mitsutaka , Tanaka Satoshi , Ikumi Saori , Ito Shingo , Okada Masayuki , Yorozu Tomoko ,   for the SAPKA Investigators
Published: March 2024

Purpose

Sodium-glucose cotransporter 2 inhibitors (SGLT2is) are commonly prescribed anti-diabetic medications with various beneficial effects; however, they have also been associated with ketoacidosis. The aim of this study was to determine the incidence of SGLT2i-associated perioperative ketoacidosis (SAPKA) in surgical patients.

Methods

We conducted a multicenter, prospective cohort study across 16 centers in Japan, enrolling surgical patients with diabetes who were prescribed SGLT2is between January 2021 and August 2022. Patients were monitored until the third postoperative day to screen for SAPKA, defined as urine ketone positivity with a blood pH of < 7.30 and HCO3 level ≤ 18.0 mEq/L, excluding cases of respiratory acidosis.

Results

In total, 759 of the 762 evaluated patients were included in the final analysis. Among these, three patients (0.40%) had urine ketones with a blood pH of < 7.30; however, blood gas analysis revealed respiratory acidosis in all three, and none of them was considered to have SAPKA. The estimated incidence of SGLT2i-associated postoperative ketoacidosis was 0% (95% confidence interval, 0%–0.4%).

Conclusions

The observed incidence of SAPKA in our general surgical population was lower than expected. However, given that the study was observational in nature, interpretation of study results warrants careful considerations for biases.
A note on p-Kähler structures on compact quotients of Lie groups
Authors: Fino Anna , Mainenti Asia
Published: March 2024

A p-Kähler structure on a complex manifold of complex dimension n is given by a d-closed transverse real (p, p)-form. In the paper, we study the existence of p-Kähler structures on compact quotients of simply connected Lie groups by discrete subgroups endowed with an invariant complex structure. In particular, we discuss the existence of p-Kähler structures on nilmanifolds, with a focus on the case $$p =2$$

p
=
2

and complex dimension $$n = 4$$

n
=
4

. Moreover, we prove that a $$(n-2)$$

(
n
-
2
)

-Kähler almost abelian solvmanifold of complex dimension $$n\ge 3$$

n
≥
3

has to be Kähler.
Sugarcane borers: species, distribution, damage and management options
Authors: Li Ao-Mei , Chen Zhong-Liang , Liao Fen , Zhao Yong , Qin Cui-Xian , Wang Miao , Pan You-Qiang , Wei Shao-Long , Huang Dong-Liang
Published: March 2024

Lepidopteran borers stand out as the most destructive pests in sugarcane, leading to reductions in stalk weight, juice quality and sugar recovery. Presently, integrated pest management (IPM) systems are utilized for sugarcane borer management, employing diverse methods encompassing cropping system, chemical pesticides, behavioral manipulation, biological agents and the selection of resistant varieties. However, the effectiveness of this strategy remains controversial due to concerns about harmful residues, formulation limitations, environmental variability, labor shortages and increased input costs. Currently, multiple lines of transgenic sugarcane expressing insecticidal genes from the bacterium Bacillus thuringiensis (Bt) have been developed globally, offering the prospect of increases production with reduced pesticides application, thereby eliminating the negative effect of IPM. In Brazil, the first genetically modified sugarcane cultivars resistant to the sugarcane borer have been approved and released for commercial cultivation, shedding a bright light on a viable solution for sugarcane borers. This paper reviews borer species and distribution, the significant damage caused by sugarcane borers, current control approaches and the future effective control strategies. Additionally, this work provides comprehensive understanding on Bt sugarcane, serving as an additional tool to complement conventional sugarcane borers control resistance programs.
Disentangling the Therapist Effect: Clustering Therapists by Using Different Treatment Outcomes
Authors: Janse Pauline , Geurtzen Naline , Scappini Agathe , Hutschemaekers Giel
Published: March 2024

Previous studies have shown that therapists’ performance varies, known as therapist effects, and have indicated that therapists who excel in one treatment outcome may not necessarily be effective in other outcomes. This observational naturalistic study aimed to enhance our understanding of therapist effects and the assessment of therapists’ performance in different areas. The study included 68 therapists and 5,582 clients from a large mental health facility. Information about their learning activities was available for a subsample of 49 therapists. Separate multilevel analyses were conducted for treatment outcomes, including case mix-corrected OQ-45 change scores, dropout rates, referrals to other facilities, treatment duration, and client satisfaction ratings. A hierarchical cluster analysis was performed to identify groups of therapists based on their performance across various treatment outcomes. Additionally, differences in therapist characteristics among the clusters identified were examined. Therapist effects varied across different outcomes, ranging from small (2.6% for OQ-45 change) to moderate (6.5% for number of sessions). The cluster analysis revealed four distinct clusters of therapists with specific profiles. They had performance differences in certain areas but not in others. This exploratory study supports the notion that therapists exhibit diverse profiles regarding treatment outcomes. These findings are significant for future investigations of therapist effects that aim to identify the characteristics of effective therapists and in the context of personalizing treatment for clients.
Sequential hypothesis testing for selecting the number of changepoints in segmented regression models
Authors: Priulla Andrea , D’Angelo Nicoletta
Published: March 2024

Segmented regression is widely used in many disciplines, especially when dealing with environmental data. This paper deals with the problem of selecting the correct number of changepoints in segmented regression models. A review of the usual selection criteria, namely information criteria and hypothesis testing, is provided. We enhance the latter method by proposing a novel sequential hypothesis testing procedure to address this problem. Our sequential procedure’s performance is compared to methods based on information-based criteria through simulation studies. The results show that our proposal performs similarly to its competitors for the Gaussian, Binomial, and Poisson cases. Finally, we present two applications to environmental datasets of crime data in Valencia and global temperature land data.
A short-cut methodology for the spatial assessment of the biochemical river quality
Authors: Di Fluri P. , Di Talia V. , Antonioni G. , Domeneghetti A.
Published: March 2024

The deterioration of superficial water quality is a significant concern in water management. Currently, most European rivers do not achieve qualitative standards defined by Directive 2000/60/EC (Water Framework Directive, WFD), while the health status of many surface water bodies remains unknown. Within this context, we propose a new methodology to perform a semi-quantitative analysis of the pressure state of a river, starting from easily accessible data related to anthropic activities. The proposed approach aims to address the endemic scarcity of monitoring records. This study proposes a procedure to (i) evaluate the relative pressure of different human activities, (ii) identify allocation points of different pollutant sources along the river using a raster-based approach, and (iii) determine a spatial biochemical water quality index. The developed index expresses the overall biochemical state of surface water induced by pollutant sources that may simultaneously impact a single river segment. This includes establishments under the so-called Seveso Directive, activities subjected to the IPPC-IED discipline, wastewater treatment plants, and contaminated sites. The methodology has been tested over three rivers in Northern Italy, each exposed to different industrial and anthropogenic pressures: Reno, Enza, and Parma. A comparison with monitored data yielded convincing results, proving the consistency of the proposed index in reproducing the spatial variability of the river water quality. While additional investigations are necessary, the developed methodology can serve as a valuable tool to support decision-making processes and predictive studies in areas lacking or having limited water quality monitoring data.
Gundelia tournefortii L. (Akkoub): a review of a valuable wild vegetable from Eastern Mediterranean
Authors: Hani Nizar , Abulaila Khaled , Howes Melanie-Jayne , Mattana Efisio , Bacci Silvia , Sleem Khaled , Sarkis Lina , Eddine Nijad Saed , Baydoun Safa , Apostolides Nelly Arnold , Ulian Tiziana
Published: March 2024

Gundelia tournefortii L. (Asteraceae) is an artichoke-like wild edible vegetable that grows in the semi-arid climate of the East Mediterranean. Due to its high cultural and economic values for culinary and therapeutic uses, this plant is exposed to overharvesting driven by household consumption and trade, threatening the survival of natural populations. Some limited data on the nutrient composition of G. tournefortii exists indicating presence of folic acid and several essential amino acids. Research on seed germination reports that mechanical scarification, gibberellic acid, and cold stratification are all effective treatments for seed dormancy breaking and therefore to propagate plants from seed. Successful vegetative propagation from the plant meristems is also available. However, despite some exceptions, the species is still not widely cultivated due to its thorny habit and complex seed germination requirements, and the ability to ensure seed germination under natural field conditions remains to be addressed.
Early prediction of ventricular peritoneal shunt dependency in aneurysmal subarachnoid haemorrhage patients by recurrent neural network-based machine learning using routine intensive care unit data
Authors: Schweingruber Nils , Bremer Jan , Wiehe Anton , Mader Marius Marc-Daniel , Mayer Christina , Woo Marcel Seungsu , Kluge Stefan , Grensemann Jörn , Quandt Fanny , Gempt Jens , Fischer Marlene , Thomalla Götz , Gerloff Christian , Sauvigny Jennifer , Czorlich Patrick
Published: March 2024

Aneurysmal subarachnoid haemorrhage (aSAH) can lead to complications such as acute hydrocephalic congestion. Treatment of this acute condition often includes establishing an external ventricular drainage (EVD). However, chronic hydrocephalus develops in some patients, who then require placement of a permanent ventriculoperitoneal (VP) shunt. The aim of this study was to employ recurrent neural network (RNN)-based machine learning techniques to identify patients who require VP shunt placement at an early stage. This retrospective single-centre study included all patients who were diagnosed with aSAH and treated in the intensive care unit (ICU) between November 2010 and May 2020 (n = 602). More than 120 parameters were analysed, including routine neurocritical care data, vital signs and blood gas analyses. Various machine learning techniques, including RNNs and gradient boosting machines, were evaluated for their ability to predict VP shunt dependency. VP-shunt dependency could be predicted using an RNN after just one day of ICU stay, with an AUC-ROC of 0.77 (CI: 0.75–0.79). The accuracy of the prediction improved after four days of observation (Day 4: AUC-ROC 0.81, CI: 0.79–0.84). At that point, the accuracy of the prediction was 76% (CI: 75.98–83.09%), with a sensitivity of 85% (CI: 83–88%) and a specificity of 74% (CI: 71–78%). RNN-based machine learning has the potential to predict VP shunt dependency on Day 4 after ictus in aSAH patients using routine data collected in the ICU. The use of machine learning may allow early identification of patients with specific therapeutic needs and accelerate the execution of required procedures.
The Relationship between Religion, Spirituality, Psychological Well-Being, Psychological Resilience, Life Satisfaction of Medical Students in the Gaziantep, Turkey
Authors: Akbayram Hatice Tuba , Keten Hamit Sirri
Published: March 2024

Religion and spirituality have been associated with better psychological health. The present study aims to investigate the relationship between the psychological well-being, psychological resilience, life satisfaction and religion/spirituality. An online cross-sectional study was conducted at the Gaziantep University School of Medicine, Turkey. The data were collected by using Personal Information Form, Individual Religion Inventory (IRI), Psychological Wellbeing Scale (PWBS), Brief Psychological Resilience Scale (BPRS), and Satisfaction with Life Scale (SWLS). A total of 399 students participated in the study, 84% of them stated that they were Muslim. The perception of good psychological health was significantly higher among Muslims (32.7%) than non-Muslims (14.3%) (p = 0.013). The PWBS, BPRS, SWLS scores were significantly higher in those who attached very importance to religious/spiritual practices compared to those who attached little importance. While PWBS scores and BPRS scores did not differ, the SWLS scores was significantly higher in Muslims compared with the non-Muslims. A positive correlation was found between the IRI scores and PWBS (r = 0.446 p < 0.001), BPRS (r = 0.252 p < 0.001), and SWLS scores (r = 0.450 p < 0.001) for Muslim participants. The study showed that giving importance to religious/spiritual practices is associated with better psychological health.
Effect of roasting temperature on bioactive compounds, antioxidant activity, phenolic profile, chemical properties, and oil extraction method on fatty acids composition of chia (Salvia hispanica L.) seeds and oil
Authors: Al-Juhaimi Fahad , Erdem Ayşenur , Ahmed Isam A. Mohamed , Uslu Nurhan , Özcan Mehmet Musa , Adiamo Oladipupo
Published: March 2024

In this study, the effects of roasting chia seeds at different temperatures (90 and 120 °C) on total phenol, flavonoid, and carotenoid contents and antioxidant activities were examined. Additionally, the effects of different extraction methods on the phenolic components of chia seeds and the chemical properties and fatty acids of chia seed oils were investigated. Chia seed oil was extracted via Soxhlet without roasting as control, yielded 29.62%. The oils from seeds roasted at 90 °C and 120 °C had yields of 32.65% and 33.85%. The control oil had an acidity value of 4.70%. In comparison, the acidity values were 4.20% and 3.61% for the oils from seeds roasted at 90 °C and 120 °C. The total phenol result of the control sample was found to be 2.55 mg GAE/g, while the total phenol contents in Chia samples roasted at 90 °C and 120 °C are determined as 2.34 mgGAE/g and 2.14 mg GAE/g, respectively. Also, the flavonoid contents of the roasted chia samples (90 °C and 120 °C) were reported as 13.71 mgCE/g and 12.91 mgCE/g, respectively. It was observed that the application of roasting caused a decrease in quercetin and resveratrol values (p < 0.01). The highest antioxidant value (80.13%) was established in chia sample roasted at 90 °C. Quercetin, catechin, resveratrol, kaempferol and izorhamnetin were the main phenolic components of chia seeds. Other phenolic components such as syringic acid, p-cuoumeric acid, caffeic acid, and gallic acid were found at quite low levels. It was observed that of roasting application caused a decrease in quercetin and resveratrol values. The highest fatty acids in chia seeds were linoleic and linolenic acids. Linolenic and linoleic acid results of chia oils were recorded to be between 64.58 and 68.10% to 17.30 and 18.44%, respectively. The palmitic, stearic, oleic, linoleic and linolenic (except sonication) acid contents of the chia oils obtained by Soxhlet and sonication systems from roasted seeds were found high compared to the control.
Flood hazard mapping using a GIS-based morphometric analysis approach in arid regions, a case study in the Red Sea Region, Egypt
Authors: Abdelgawad Ahmed G. , Helal Esam , Sobeih Mohmaed F. , Elsayed Hamdy
Published: March 2024

Flash floods are a major threat to life and properties in arid regions. In recent decades, Egypt has experienced severe flash floods that have caused significant damage across the country, including the Red Sea region. The aim of this study is to map the flood hazards in flood-prone areas along the Red Sea region using a Geographic Information System (GIS)-based morphometric analysis approach. To evaluate the flood hazard degree, the adopted methodology considers various morphometric parameters such as basin area, slope, sinuosity index, shape factor, drainage intensity, circularity ratio, and curve number. GIS techniques were employed to delineate the watershed and the drainage network. The delineated watershed was used together with the digitized maps of soil and land use types to estimate the curve number and the morphometric parameters for each subbasin. The flood hazard degrees are calculated based on the considered morphometric parameters and distinguished based on a five-degree scale ranging from very low to very high. Results indicate that 47% of the study area has a very high flood hazard degree. Furthermore, morphometric analysis results align with the runoff results simulated by a hydrological model, where, for example, basins with a high to very high hazard degree exhibited high runoff. This suggests the influence of physical characteristics on the hydrological behavior of the watershed and further validates the morphometric analysis presented in this work. The results presented here can help policy planners and decision-makers develop appropriate measures to mitigate flash floods and achieve sustainable development in arid regions.
Deconstructing gendered approaches in ‘single-sex’ flexi schools: two Australian case studies
Authors: McGregor Glenda , Mills Martin
Published: March 2024

In Australia coeducation dominates government schooling, with single-sex institutions usually being the preserve of selective government schools and private, often elite, institutions. For marginalised young people who ‘drop out’ or are forced to leave the coeducational mainstream system, flexible and/or non-traditional schools provide alternative pathways. Such schools are primarily coeducational. This paper draws upon data from two flexible/non-traditional schools in Australia that attempted to address the issues of educational disengagement via the provision of single-sex schooling: Fernvale Education Centre and Lorem School. The data are insightful with regard to these two very different gender and education paradigms and to their associated discourses about masculinity and femininity. The paper will identify the ways in which these schools both reproduce and challenge dominant constructions of gender within the context of responding to disenfranchised/disengaged young people.
Semantic Polyp Generation for Improving Polyp Segmentation Performance
Authors: Song Hun , Shin Younghak
Published: March 2024

Purpose

To improve the performance of deep-learning-based image segmentation, a sufficient amount of training data is required. However, it is more difficult to obtain training images and segmentation masks for medical images than for general images. In deep-learning-based colon polyp detection and segmentation, research has recently been conducted to improve performance by generating polyp images using a generative model, and then adding them to training data.

Methods

We propose SemanticPolypGAN for generating colonoscopic polyp images. The proposed model can generate images using only the polyp and corresponding mask images without additional preparation of input condition. In addition, the semantic generation of the shape and texture of polyps and non-polyp parts is possible. We experimentally compare the performance of various polyp-segmentation models by integrating the generated images and masks into the training data.

Results

The experimental results show improved overall performance for all models and previous work.

Conclusion

This study demonstrates that using polyp images generated by SemanticPolypGAN as additional training data can improve polyp segmentation performance. Unlike existing methods, SemanticPolypGAN can independently control polyp and non-polyp parts in a generation.
An empirical investigation into moral challenges of (breaching) confidentiality and needs for ethics support when facilitating moral case deliberation
Authors: Ligtenberg W. M. R. , Molewijk A. C. , Stolper M. M.
Published: March 2024

Ethics support staff help others to deal with moral challenges. However, they themselves can also experience moral challenges such as issues regarding (breaching) confidentiality when practicing ethics support. Currently there is no insight in these confidentiality issues and also no professional guidance for dealing with them. To gain insight into moral challenges related to Moral Case Deliberation (MCD), we studied a) beliefs and experiences of MCD facilitators regarding breaching confidentiality, b) considerations for (not) breaching confidentiality, and c) needs for an ethics support tool. Data collection consisted of qualitative research methods: six semi-structured interviews; analyses of a) two recorded MCD sessions, and b) a focus group with MCD facilitators. Findings: MCD facilitators mention different conceptions and interpretations of confidentiality and various moral challenges. Questions concerning confidentiality ultimately cause reflections on roles and responsibilities of facilitators. Needs for ethics support vary from seeking advice to procedural and sometimes normative guidance for MCD facilitators. Education for MCD facilitators should focus on developing a concrete tool that stimulates awareness and reflection(skills).
Effect of four host plants on the life history and nutritional indices of Spodoptera Littoralis
Authors: El-Refaie Rasha M. , Shaurub El-Sayed H. , Abd-Allah Ghada E. , Ebeid Ahmed A. , Abouelnaga Zeinab S.
Published: March 2024

The Egyptian cotton leafworm Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) is a pervasive and highly polyphagous insect pest. As S. littoralis has developed resistance to major classes of conventional insecticides and the use of these insecticides has caused negative impacts on the ecosystems, it is necessary to search for eco-friendly, cost-effective, and sustainable agents to control. This can be achieved by identifying the preferred host plant. The present study aimed at evaluating the impacts of four host plants– castor bean, tomato, potato, and cucumber on the various life-history traits and nutritional indices of S. littoralis. The concentrations of nitrogen, potassium, and phosphorous in the tested host plants were quantified. Newly hatched larvae were divided into four groups. Each group was fed only on one type of the four tested host plants until pre-pupal stage. Then, the life-history traits and nutritional indices were determined. Larvae fed on castor bean showed the highest adult emergence, weight of full-grown larvae, number of eggs per female, and egg-hatch percent, food consumption, relative growth rate, and food utilization efficiencies. Whereas, larvae fed on cucumber showed the lowest egg-hatch percent, food consumption, relative growth rate, and food utilization efficiencies. There was a positive correlation between nitrogen and phosphorous concentrations in the tested host plants and larval weight, with the highest concentrations in castor bean. Castor bean was the most preferred host plant.
Endo Time: Endometriosis and the Flow of Recognition
Authors: Hallström Ina
Published: March 2024

The relation between time and gender has been extensively discussed in feminist theory, from Simone de Beauvoir to recent studies of queer temporality and crip time. In this article, I explore gender as “lived time” in relation to a pressing feminist issue: social recognition of the chronic illness endometriosis (endo). Based on my interviews with individuals diagnosed with endo, I argue that lived time can be studied by approaching becoming as a dynamic process or flow of recognition, creating certain temporal patterns in the lifeworld. I propose the concept of “endo time” as a phenomenological conception of the lived time of endo. I identify three temporal patterns that characterize endo time: waiting time (I), cyclical or chronic time (II), and sedimented time (III). The analysis contributes to feminist philosophy by detailing how gender appears as a specific orchestration of time. Because of its connection to feminized pain and menstrual flow on the one hand and social recognition on the other, endo presents an illuminating case for exploring the relation between gender, recognition, and lived time.
Limit cycles in a rotated family of generalized Liénard systems allowing for finitely many switching lines
Authors: Chen Hebai , Tang Yilei , Zhang Weinian
Published: March 2024

Analytic rotated vector fields have four significant properties: as the rotated parameter

$\alpha$

changes, the amplitude of each stable (or unstable) limit cycle varies monotonically, each semi-stable limit cycle bifurcates at most two limit cycles, the isolated homoclinic loop (if exists) disappears while a unique limit cycle with the same stability arises or no closed orbits arise oppositely, and a unique limit cycle arises near the weak focus (if exists). In this paper, we prove that the four properties remain true for a rotated family of generalized Liénard systems having finitely many switching lines. Furthermore, we discuss variational exponent and use it to formulate multiplicity of limit cycles. Then we apply our results to give exact number of limit cycles to a continuous piecewise linear system with three zones and answer to a question on the maximum number of limit cycles in an SD oscillator.
Réduire le fossé culturel entre les forces armées et la société civile sans rompre avec le « compromis huntingtonien »
Authors: Parenteau Danic
Published: March 2024

Cet article propose une réflexion sur les initiatives politiques déployées ces dernières années un peu partout en Occident afin de rendre les forces armées plus « représentatives ». S'il est difficile de contester la légitimité démocratique de ces initiatives, celles-ci risquent néanmoins de porter atteinte à l'autonomie professionnelle des officiers au sein des forces armées, conformément à ce que nous appelons le « compromis huntingtonien », soit le modèle de relations civilo-militaires qui domine encore aujourd'hui en Occident. En effet, en intervenant directement dans les « affaires internes » des forces armées, le pouvoir civil se trouve ainsi à empiéter sur les pouvoirs et le champ des responsabilités professionnelles exercées par les officiers sur les forces armées. Pour pallier ce risque, nous proposons un élargissement du « rôle politique » de l'officier, à l'intérieur même du cadre fixé par le compromis huntingonien. Cela devrait se traduire par deux axes complémentaires d'action pour l'officier aujourd'hui négligés : d'une part, défendre la place singulière des forces armées dans la société et, d'autre part, agir en tant qu'agent de changement culturel au sein des forces armées.
Art and Markets in the Greco-Roman World
Authors: Etro Federico
Published: March 2024

We study art markets in the Greco-Roman world to explore the origins of artistic innovations in classical Greece and the mass production of imitative works in the Roman Empire. Economic factors may have played a role, on one side fostering product innovations when a few rival Greek city-states competed, outbidding each other to obtain higher-quality artworks, and on the other side fostering process innovations when a large integrated market promoted art trade across the Mediterranean Sea. The evidence on art prices is consistent with this. Literary evidence on classical Greek painting from V–III centuries BC (largely from Pliny the Elder) shows that the real price of masterpieces increased up to the peak of creativity reached with Apelles. Epigraphic evidence on Roman sculpture from I–III centuries AD (largely from inscriptions at the base of statues) shows that the real price of statues was stable and largely equalized across the imperial provinces.