bluuebunny/crossref_metadata_2025 huggingface dataset:
“I can’t describe how I could get better, but I would like to” - Conception of health and illness of refugee youth in Germany
Authors: van der Meer Anna Swantje , Durlach Friederike , Szota Katharina , Christiansen Hanna
Published: May 2023

Introduction and objective

Almost half of all the people displaced worldwide are children and adolescents. Many refugee children, adolescents, and young adults suffer from psychological stress. However, their utilization of (mental) health services is low, probably due to a lack of knowledge about (mental) health and (mental) health care. The current study aimed to explore concepts of (mental) health and illness of refugee youth as well as assess their mental health literacy (MHL) to arrive at conclusions for improving mental health care access and use.

Method

From April 2019 to October 2020, we conducted 24 face-to-face interviews with refugee children and adolescents in an outpatient clinic (n = 8), in youth welfare facilities (n = 10), and at a middle school (n = 6). A semi-structured interview was used to assess knowledge about mental and somatic health and illness as well as corresponding health strategies and care options. The material was evaluated using qualitative content analysis.

Results

Participants (N = 24) were between 11 and 21 years old (M = 17.9, SD = 2.4). The coded material was assigned to four thematic main areas: (1) conception of illness, (2) conception of health, (3) knowledge about health care structures in their country of origin, and (4) perceptions of mental health care structures in Germany. Compared to somatic health, the interviewed refugee children and adolescents knew little about mental health. Furthermore, respondents were more aware of opportunities of somatic health promotion, but almost none knew how to promote their mental health. In our group-comparative analysis we observed that younger children possess little knowledge about mental health-related topics.

Conclusion

Our results show that refugee youth have more knowledge about somatic health and somatic health care than about mental health (care). Accordingly, interventions to promote the MHL of refugee youth are necessary to improve their utilization of mental health services and to provide adequate mental health care.
Enlisting in the army in the Jewish Ultraorthodox community and the consequences for wellbeing
Authors: Malovicki-Yaffe Nechumi , Itzhaki-Braun Yael , Shahar-Rosenblum Shomi
Published: May 2023

Israeli law requires citizens to enlist in the army at 18 years old. However, the Jewish Ultraorthodox community has a longstanding agreement with the state that members of this community will not have to enlist in the army, given its spiritual leaders’ strong opposition. Still, there are young men who go against the communal norms and enlist. In the current study we investigated these young men and the contribution of their self-esteem (a personal resource), their sense of community (a communal resource), and the community members’ attitudes toward them (societal conditional regard, both positive and negative, and stigma) to their wellbeing. The current study consisted of 153 participants between the ages of 20 and 55 (M = 29.64, SD = 6.89). A path analysis model indicated the protective role played by self-esteem and sense of community in participants’ wellbeing, and the risk factor posed by societal conditional negative regard and stigma. Moreover, self-esteem was found to mediate between income and wellbeing, whereas sense of community was found to mediate between societal conditional negative regard and wellbeing, and between stigma and wellbeing. The discussion highlights the complexity of the protective role played by sense of community against the risk of experiencing societal conditional negative regard and stigma. It also addresses the importance of promoting intervention programs during the army service of these young men, with a focus on promoting their self-esteem and on the presence of a spiritual leadership that legitimizes working, serving in the army, and yet still being part of the community.
Fake news during the war in Ukraine: coping strategies and fear of war in the general population of Romania and in aid workers
Authors: Vintilă Mona , Lăzărescu Gianina-Mălina , Kalaitzaki Argyroula , Tudorel Otilia Ioana , Goian Cosmin
Published: May 2023

Introduction

In addition to the health crisis that erupted during the COVID-19 pandemic, the war between Russia and Ukraine is impacting the mental health and wellbeing of the Romanian population in a negative way.

Objectives

This study sets out to investigate the impact that social media consumption and an overload of information related to the armed conflict between Russia and Ukraine is having on the distribution of fake news among Romanians. In addition, it explores the way in which several psychological features, including resilience, general health, perceived stress, coping strategies, and fear of war, change as a function of exposure to traumatic events or interaction with victims of war.

Methods

Participants (N = 633) completed the General Health Questionnaire (GHQ), the CERQ scale with its nine subscales, the Perceived Stress Scale (PSS), and the BRS scale (Brief Resilience Scale), the last of which measures resilience. Information overload, information strain and the likelihood of the person concerned spreading fake news were assessed by adapting items related to these variables.

Findings

Our results suggest that information strain partially moderates the relationship between information overload and the tendency to spread false information. Also, they indicate that information strain partially moderates the relationship between time spent online and the tendency to spread false information. Furthermore, our findings imply that there are differences of high and moderate significance between those who worked with refugees and those who did not as regards fear of war and coping strategies. We found no practical differences between the two groups as regards general health, level of resilience and perceived stress.

Conclusion and recommendations

The importance of discovering the reasons why people share false information is discussed, as is the need to adopt strategies to combat this behavior, including infographics and games designed to teach people how to detect fake news. At the same time, aid workers need to be further supported to maintain a high level of psychological wellbeing.
Examining student burnout causes among English as a foreign language students: focus on school climate and student growth mindset
Authors: Liu Xiaoling
Published: May 2023

Introduction

The aim of this study was to investigate the relationship between student burnout and two key factors - perceived school climate and growth mindset - in the context of English as a foreign language (EFL) learning among Chinese students.

Methods

A sample of 412 intermediate English language learners from China participated in an online survey and completed valid measures of the three constructs. Confirmatory factor analysis (CFA) was used to establish the validity of the scales used to measure the three latent variables. Structural equation modeling (SEM) was then used to test the proposed model.

Results

The results of SEM showed that both perceived school climate and growth mindset had a significant positive impact on EFL student burnout, with perceived school climate having a stronger effect compared to growth mindset.

Discussion

The findings suggest that promoting a positive school climate and fostering a student growth mindset can help reduce student burnout in EFL settings.
The integrated treatment of eating disorders, posttraumatic stress disorder, and psychiatric comorbidity: a commentary on the evolution of principles and guidelines
Authors: Brewerton Timothy D.
Published: May 2023

Psychiatric comorbidity is the norm in the assessment and treatment of eating disorders (EDs), and traumatic events and lifetime PTSD are often major drivers of these challenging complexities. Given that trauma, PTSD, and psychiatric comorbidity significantly influence ED outcomes, it is imperative that these problems be appropriately addressed in ED practice guidelines. The presence of associated psychiatric comorbidity is noted in some but not all sets of existing guidelines, but they mostly do little to address the problem other than referring to independent guidelines for other disorders. This disconnect perpetuates a “silo effect,” in which each set of guidelines do not address the complexity of the other comorbidities. Although there are several published practice guidelines for the treatment of EDs, and likewise, there are several published practice guidelines for the treatment of PTSD, none of them specifically address ED + PTSD. The result is a lack of integration between ED and PTSD treatment providers, which often leads to fragmented, incomplete, uncoordinated and ineffective care of severely ill patients with ED + PTSD. This situation can inadvertently promote chronicity and multimorbidity and may be particularly relevant for patients treated in higher levels of care, where prevalence rates of concurrent PTSD reach as high as 50% with many more having subthreshold PTSD. Although there has been some progress in the recognition and treatment of ED + PTSD, recommendations for treating this common comorbidity remain undeveloped, particularly when there are other co-occurring psychiatric disorders, such as mood, anxiety, dissociative, substance use, impulse control, obsessive–compulsive, attention-deficit hyperactivity, and personality disorders, all of which may also be trauma-related. In this commentary, guidelines for assessing and treating patients with ED + PTSD and related comorbidity are critically reviewed. An integrated set of principles used in treatment planning of PTSD and trauma-related disorders is recommended in the context of intensive ED therapy. These principles and strategies are borrowed from several relevant evidence-based approaches. Evidence suggests that continuing with traditional single-disorder focused, sequential treatment models that do not prioritize integrated, trauma-focused treatment approaches are short-sighted and often inadvertently perpetuate this dangerous multimorbidity. Future ED practice guidelines would do well to address concurrent illness in more depth.
Comparison of olanzapine-induced weight gain and metabolism abnormalities between topiramate and vitamin C in patients with schizophrenia: a preliminary study
Authors: Zhang Jinling , Chen Shu , Chen Jia , Zhang Handi , Rao Wen-Wang
Published: May 2023

Background

Topiramate (TPM) may reduce olanzapine (OLZ)-related weight gain and metabolism abnormalities in patients with schizophrenia. However, differences in the efficacy of OLZ-related weight gain and metabolism abnormalities between TPM and vitamin C (VC) are not clear. This study aimed to investigate whether TPM is more effective than VC in reducing OLZ-induced weight gain and metabolic abnormalities in patients with schizophrenia and explore their patterns.

Methods

This was a 12-week longitudinal comparison study in OLZ-treated patients with schizophrenia. Twenty-two patients who received OLZ monotherapy plus VC treatment (OLZ + VC group) was matched to 22 patients who received OLZ monotherapy plus TPM treatment (OLZ + TPM group). Body mass index (BMI) and metabolism indicators were measured at baseline and 12-weeks follow-up.

Results

A significant difference in triglyceride (TG) levels at different time points (pre-treatment: F = 7.89, p = 0.008; 4-weeks treatment: F = 13.19, p = 0.001; 12-weeks treatment: F = 54.48, p < 0.001) was found. Latent profile analysis demonstrated that a 2-class model for OLZ + TPM group (high vs. low BMI in the first 4 weeks) and OLZ + VC group (high vs. low), respectively.

Conclusion

Our findings suggested that TPM could better mitigates OLZ-induced increase in TG levels. The trajectories of change also differed in all metabolic indexes over time between the two groups.
What is important to service users and staff when implementing suicide-focused psychological therapies for people with psychosis into mental health services?
Authors: Peters Sarah , Awenat Yvonne , Gooding Patricia A. , Harris Kamelia , Cook Leanne , Huggett Charlotte , Jones Steven , Lobban Fiona , Pratt Daniel , Haddock Gillian
Published: May 2023

Introduction

Suicide is a leading cause of death globally. People with psychosis are at increased risk of suicide death and up to half experience suicidal thoughts and/or engage in suicidal behaviors in their lifetime. Talking therapies can be effective in alleviating suicidal experiences. However, research is yet to be translated into practice, demonstrating a gap in service provision. The barriers and facilitators in therapy implementation require a thorough investigation including the perspectives of different stakeholders such as service users and mental health professionals. This study aimed to investigate stakeholders’ (health professionals and service users) perspectives of implementing a suicide-focused psychological therapy for people experiencing psychosis in mental health services.

Methods

Face-to-face, semi-structured interviews with 20 healthcare professionals and 18 service users were conducted. Interviews were audio recorded and transcribed verbatim. Data were analyzed and managed using reflexive thematic analysis and NVivo software.

Results

For suicide-focused therapy to be successfully implemented in services for people with psychosis, there are four key aspects that need to be considered: (i) Creating safe spaces to be understood; (ii) Gaining a voice; (iii) Accessing therapy at the right time; and (iv) Ensuring a straightforward pathway to accessing therapy.

Discussion

Whilst all stakeholders viewed a suicide-focused therapy as valuable for people experiencing psychosis, they also recognize that enabling successful implementation of such interventions will require additional training, flexibility, and resources to existing services.
Comparing the role of social connectivity with friends and family in depression among older adults in China: evaluating the moderating effect of urban–rural status
Authors: Gu Yuxuan , Ali Shahmir H. , Guo Aimei
Published: May 2023

Background

Social connectivity and support can reduce depressive symptoms. Few studies have examined urban–rural differences in the relationship between social support and depressive symptoms in the context of urbanization for Chinese older adults. The overall aim of this study is to examine urban–rural differences in the relationship between family support and social connectivity on depression among Chinese older adults.

Methods

This cross-sectional study used data from the 2010 Sample Survey on Aged Population in Urban/Rural China (SSAPUR). Depressive symptoms were measured using the Geriatric Depression Scale short-form (GDS-15). Family support was measured by structural, instrumental, and emotional support. Social connectivity was measured using the Lubben Social Network Scale-6 (LSNS-6). Descriptive analysis was conducted using chi-square and independent t-tests to examine urban–rural differences. Adjusted multiple linear regressions were conducted to examine the moderating effect of urban–rural status on the association between types of family support and social connectivity with depressive symptoms.

Results

In rural areas, respondents who felt their children exhibited filial piety (β = −1.512, p < 0.001) and had more social connectivity with family (β = −0.074, p < 0.001) were more likely to report fewer depression symptoms. In urban areas, respondents who received instrumental support from their children (β = −1.276, p < 0.01), who thought their children exhibited filial piety (β = −0.836, p < 0.01), and who had more social connectivity with friends (β = −0.040, p < 0.01) were more likely to report fewer depression symptoms. In the fully adjusted regression model, social connectivity with family was associated with decreased depressive symptoms, although to a lesser degree among urban-dwelling older adults (urban–rural interaction effect, β = 0.053, p < 0.05). Social connectivity with friends was similarly associated with decreased depressive symptoms, although this effect was greater among urban-dwelling older adults (urban–rural interaction effect, β = −0.053, p < 0.05).

Conclusion

The results of this study suggested that older adults both in rural and urban areas with family support and social connectivity were associated with fewer depression symptoms. Differences observed in the role of family and friend social connectivity by urban–rural status may provide practical information for developing targeted social support strategies for improving depressive symptoms among Chinese adults, and call for further mixed-methods research to disentangle mechanisms behind these differing associations.
Retrospective analysis on distribution and antifungal susceptibility profile of Candida in clinical samples: a study from Southern India
Authors: S. Umamaheshwari , Sumana M. N.
Published: May 2023

Introduction

Candida is one of the rising primary causes of infections connected with health care. However, their distribution and susceptibility patterns vary widely amongst different regions.

Method

The study was carried out to retrospectively analyze the distribution of Candida in various clinical samples, their species types and susceptibility, in a tertiary care hospital, in India for 4 years using the Vitek-2 database.

Results

Candida infection was identified in 751 clinical samples, and the major source of infection was found to be urine samples accounting for about 58.32%. A total of 18 different Candida species were recorded. Non-albicans Candida (NAC) 73.64% (n = 553) predominated Candida albicans 26.36% (n = 198). Candida tropicalis was found to be identified at a higher frequency followed by C. albicans, Candida glabrata and Candida parapsilosis. Candida tropicalis was the only species which were recovered from bile; Candida pelliculosa was recorded merely from blood and Candida lipolytica from urine and blood and not in any other samples. In vaginal swabs, C. albicans accounted for 63.64% (n = 14) compared to NAC 36.36% (n = 8). The susceptibility test revealed that 75.44% (n = 559) isolates were susceptible and 24.56% (n = 182) were resistant to one or more drugs tested. Major resistance was exhibited to flucytosine by C. tropicalis 77.46% (n = 55) compared to C. albicans 11.27% (n = 8). Apart from C. albicans, NAC-C. tropicalis, C. glabrata and Candida krusei showed resistance to echinocandins, and Candida haemulonii to amphotericin-B.

Conclusion

The knowledge of the incidence, resistance and emergence of different species might guide clinicians to select an appropriate antifungal therapy and plan effective strategies to control invasive and systemic Candida infections.
Modifiable determinants of central obesity among the rural black population in the DIMAMO HDSS, Limpopo, South Africa
Authors: Ntimana Cairo B. , Choma Solomon S. R.
Published: May 2023

Background

Central obesity is a leading risk factor for cardiometabolic diseases, in which body fat accumulates to a particular extent, and may negatively impact on health. The prevalence of abdominal obesity has increased over the last 10 years and currently surpasses that of overall obesity. There is a scarcity of data on the determinants of central obesity, especially among populations residing in rural Africa. The aim of the present study was thus to determine sociodemographic and lifestyle factors that are associated with central obesity.

Methods

This was a cross-sectional, retrospective study. The present study used secondary data from the AWI-Gen phase 1 study. The study comprised 791 participants, of which 242 were men and 549 were women aged 40 years and above. The participants were selected by convenient sampling. Data were analyzed using the Statistical Package for Social Sciences version 27. A comparison of proportions was performed using the chi-square test, while a comparison of means was performed using an unpaired Student t-test. The association between sociodemographic and lifestyle factors with central obesity was analyzed using bivariate correlation, partial correlation, and binary regression analysis, and the statistical significance was set at a p-value of <0.05.

Results

The proportion of central obesity in the total population was 59.9%, and significantly more women were centrally obese (79.6 vs. 15.3%, p = <0.001) as compared to men. Married status correlated positively and significantly with central obesity in both bivariate and partial correlations. Moreover, binary logistic regression further confirmed the positive association between married status and central obesity. Single status correlated negatively and significantly with central obesity. The correlation remained unchanged even after controlling for age and gender. Binary logistic regression showed that unemployment correlated significantly with central obesity. The proportion of smokers was also significantly higher in participants without central obesity than in those with central obesity (87.2 vs. 34.0%, p = <0.001). Smoking correlated negatively and significantly with central obesity in bivariate and partial correlations. In addition, binary logistic regression further confirmed the negative association between smoking and central obesity.

Conclusion

The present study shows that in this population, central obesity is determined by gender, unemployment, and marital status.
A robust approach for endotracheal tube localization in chest radiographs
Authors: Hsu Chung-Chian , Ameri Rasoul , Lin Chih-Wen , He Jia-Shiang , Biyari Meghdad , Yarahmadi Atefeh , Band Shahab S. , Lin Tin-Kwang , Fan Wen-Lin
Published: May 2023

Precise detection and localization of the Endotracheal tube (ETT) is essential for patients receiving chest radiographs. A robust deep learning model based on U-Net++ architecture is presented for accurate segmentation and localization of the ETT. Different types of loss functions related to distribution and region-based loss functions are evaluated in this paper. Then, various integrations of distribution and region-based loss functions (compound loss function) have been applied to obtain the best intersection over union (IOU) for ETT segmentation. The main purpose of the presented study is to maximize IOU for ETT segmentation, and also minimize the error range that needs to be considered during calculation of distance between the real and predicted ETT by obtaining the best integration of the distribution and region loss functions (compound loss function) for training the U-Net++ model. We analyzed the performance of our model using chest radiograph from the Dalin Tzu Chi Hospital in Taiwan. The results of applying the integration of distribution-based and region-based loss functions on the Dalin Tzu Chi Hospital dataset show enhanced segmentation performance compared to other single loss functions. Moreover, according to the obtained results, the combination of Matthews Correlation Coefficient (MCC) and Tversky loss functions, which is a hybrid loss function, has shown the best performance on ETT segmentation based on its ground truth with an IOU value of 0.8683.
Diagnostic and therapeutic strategies for vascular complications after renal transplantation: a single-center experience in 2,304 renal transplantations
Authors: Zhang Jiangwei , Xue Wujun , Tian Puxun , Zheng Jin , Ding Chenguang , Li Yang , Wang Ying , Ding Xiaoming
Published: May 2023

Vascular complications after renal transplantation are one of the serious surgical complications, which can affect the transplantation outcome and even endanger life if not treated properly. We performed a retrospective analysis of the 2,304 renal transplantations procedures completed between the period of Jan., 2015 and Jan., 2022, which consisted of 1,658 male patients and 646 female patients. Among the above cases, there were 54 cases of vascular complications after renal transplantation, the incidence of vascular complications in our study was 2.34% (54/2,304), the most common vascular complication was transplanted renal artery stenosis (TRAS, n = 36), followed by external iliac artery dissection (n = 5), renal artery rupture (n = 4), renal vein thrombosis (n = 3), renal artery thrombosis (n = 2), renal artery dissection (n = 1), renal artery pseudoaneurysm (n = 1), and internal iliac artery pseudoaneurysm (n = 1), and renal artery kinking (n = 1). 40 patients were treated by percutaneous transluminal angioplasty (PTA), including 3 balloon catheter dilatation and 37 endovascular stentings, and 14 underwent open surgery. Eventually, 9 patients had graft nephrectomy, resulting in an overall treatment rate of 81.5%. Most vascular complications can be treated satisfactorily with PTA. However, the overall treatment of renal artery rupture, thrombosis, renal artery kinking, and other complications is poor, and the rate of transplanted renal loss is high.
Micro-flow imaging for in-situ and real-time enumeration and identification of microplastics in water
Authors: Choran Nimitha , Örmeci Banu
Published: May 2023

Microplastics (MPs) are emerging contaminants that have recently gained global attention. Current identification and quantification methods are known to be time-consuming, labor-intensive, and lack consensus on protocol standardization. This study explored the potential of micro-flow imaging (MFI) technology for rapid and in-situ identification and enumeration of MPs in water using two (2) MFI-based particle counters. Advantages, limitations, and recommendations for using MFI for MPs analysis were discussed. MPs with diverse physical (i.e., microbeads, fragments, fibers, and films) and surface (i.e., reflectivity, microporosity, color) characteristics were analyzed to understand the detection capabilities and limitations of MFI technology. Results demonstrated that MFI effectively automates most manually obtained particle features, such as size, color, object intensity and shape descriptors. It imparts consistency and reduces the subjective nature of results, thus enabling reliable comparison of the generated data. The particles can be further categorized based on their circularity and aspect ratio providing further insight into the shape and potential erosion of MPs in the environment. Transparent particles, often missed with other techniques such as microscopy, were detected by the MFI technology. The ability to assign particle IDs to MPs was an important advantage of the MFI technology that enabled the further investigation of selected MPs of interest. The limitations of the MFI technology were apparent in samples with high particle concentrations, with reflective MPs, and in the presence of bubbles. The color of the background against which the image was captured also influenced the detection accuracy. Procedural modifications during sample analysis and improvements in image analysis can assist in overcoming these challenges. MFI requires minimal sample preparation and gives real-time imaging data, making it a prime candidate for field monitoring in surface water systems in addition to laboratory analysis. With the potential application of machine learning and similar developments in the future, MFI-based particle counters are well-positioned to meet an important need in in-flow and real-time identification and enumeration of MPs.
Seven years of studying the associations between political polarization and problematic information: a literature review
Authors: Marino Giada , Iannelli Laura
Published: May 2023

This literature review examines the intersection between political polarization and problematic information, two phenomena prominent in recent events like the 2016 Trump election and the 2020 COVID-19 pandemic. We analyzed 68 studies out of over 7,000 records using quantitative and qualitative methods. Our review revealed a lack of research on the relationship between political polarization and problematic information and a shortage of theoretical consideration of these phenomena. Additionally, US samples and Twitter and Facebook were frequently analyzed. The review also found that surveys and experiments were commonly used, with polarization significantly predicting problematic information consumption and sharing.
Comparison of surgical resection of Axillary Lymph Nodes in Dogs with Mammary Gland Tumors with or without sentinel lymph node visualization with patent blue dye
Authors: Souza Mayara Coutinho Carlo de , Flecher Mayra Cunha , Arrais Fernanda Ming , Sena Bruna Voltolin de , Giuliano Antonio , Horta Rodrigo dos Santos
Published: May 2023

Introduction:

Dogs’ axillary lymph node (ALN) is often difficult to locate before surgical resection. The anatomical location of ALN often discourages Veterinarians from surgical lymphadenectomy. Considering the limited literature available, the actual incidence of metastases and the prognostic relevance are poorly understood.

Methods:

A non-randomized, prospective clinical study was conducted with female dogs (n = 41) with mammary gland tumor (MGT) in the thoracic or cranial abdominal mammary glands. The study investigated the risks of ALN metastasis based on tumors clinical findings, tumor size, histopathological diagnosis and grade. The main aim of this study was to compare ALN resection with or without patent blue 2.5% (PB) dye injection for sentinel lymph node visualization. A total of 46 mastectomies were performed and five animals underwent two mastectomies. In the first group, 17 patients underwent a mastectomy and lymphadenectomy without PB injection (G1). In contrast, in the second group, 24 patients also received PB injections for sentinel lymph node mapping (G2). The ALN was identified in 38/46 cases (82%). The ALN was identified and excised in only 58% of surgeries in G1(19/46), while in group 2, the lymph node was identified in 92% of the cases and resected in 100% of the cases. The use of PB improves ALN’s identification and reduces the surgical resection time in dogs with MGT.

Results and discussion:

Surgical time differed between the two groups, as it was significantly shorter in the PB injection group compared to group 1 (80 vs. 45 min) (p < 0.0001). The overall frequency of ALN metastasis was 32%. Macroscopic abnormalities in the lymph nodes, tumor size (>3 cm), and diagnosis of anaplastic carcinoma or grade II/III mammary gland tumors were associated with a higher probability of ALN metastasis. Metastases in the ALNs are more common, in dogs presenting with tumors larger than 3 cm and diagnosed with aggressive histological subtypes. The ALNs should be removed for correct staging, prognostic evaluation, and decision for adjuvant therapy.
Assessment of the Vortex Feature-Based Vorticity Confinement Method Applied to Rotor Aerodynamics and Aeroacoustics
Authors: Fu Jinbin , Yuan Yi , Vigevano Luigi
Published: May 2023

The accurate prediction of helicopter rotor aerodynamics and aeroacoustics using Computational Fluid Dynamics (CFD) techniques still remains a challenge, as the over-dissipation of numerical schemes results in a higher diffusive rate of rotor wake and vortices than what can be expected from the fluid governing equations. To alleviate this issue, a vortex feature-based vorticity confinement (FVC2-L2) method that combines the locally normalized λ2 vortex detection method with the standard second vorticity confinement (VC2) scheme is presented to counterbalance the truncation error introduced by the numerical discretization of the convective term while avoiding the over-confinement inside the boundary layer. The FVC2-L2 scheme is adopted for helicopter rotor aerodynamic and aeroacoustic predictions through its implementation in the multi-block structured grid CFD solver ROSITA and coupling with the aeroacoustic code ROCAAP based on the permeable surface Ffowcs Williams–Hawkings (PS-FWH) equation. This approach is assessed in helicopter rotor flows via three databases. Firstly, the well-documented HART-II rotor in the baseline condition is used to evaluate the capability of the presented VC scheme in blade–vortex interaction (BVI) phenomena prediction. Subsequently, the UH-1H non-lifting hovering rotor and the AH-1/OLS low-speed descending flight rotor are adopted for assessment of such a method in aeroacoustics. The benefits of the FVC2-L2 scheme in terms of aerodynamics prediction, wake preservation, and noise signal prediction are well demonstrated by comparison with the experimental data and the results obtained without VC schemes. Particularly, the FVC2-L2 scheme mainly improves the highly unsteady airloads prediction, and results in an improvement of BVI noise prediction by more than 5 dB with respect to the case without VC schemes for AH-1/OLS rotor case. Additionally, some shortcomings of the approach are noticed in engineering applications. On the basis of a simplified convective vortex, some provisional guidelines on the required εo value in terms of number of cells per vortex diameter are provided: an εo value ranging from 0.01 to 0.04 for grids which may represent the vortex core diameter with 6 to 12 cells.
Surrounding Semi-Natural Vegetation as a Source of Aphidophagous Syrphids (Diptera, Syrphidae) for Aphid Control in Apple Orchards
Authors: Wojciechowicz-Żytko Elżbieta , Wilk Edyta
Published: May 2023

The influence of different semi-natural surroundings adjacent to apple orchards on the occurrence of predatory syrphids and biological control of Aphis pomi Deg. and Dysaphis plantaginea Pass. was compared. Two methods of catching hoverflies were used: yellow traps to collect the adults and hand picking to get the larvae from aphid colonies. A total of 1029 Syrphidae (26 species belonging to 14 genera) of subfamily Syrphinae were collected in Moericke traps from apple orchards and their boundaries. At all sites, a much greater number of hoverflies was collected in the surroundings (638 specimens) than in the orchards (391 specimens). In apple orchards, 134 syrphids belonging to 10 species were reared from A. pomi and D. plantaginea colonies. In both cases, the dominants were Episyrphus balteatus (Deg.) Eupeodes corollae (Fabr.), Syrphus vitripennis Meig. and S. scripta (L.), suggesting that hoverflies are attracted by plants flowering in semi-natural habitats in the vicinity of the orchard, and they then migrate to the orchard and reduce the aphid colonies. The results confirmed the positive influence of natural surroundings on the conservation of aphid predators.
White Stork (Ciconia ciconia) Nestlings Affected by Agricultural Practices? Assessment of Integrated Biomarker Responses
Authors: Bjedov Dora , Velki Mirna , Kovačić Lucija Sara , Begović Lidija , Lešić Ivan , Jurinović Luka , Mikuska Tibor , Sudarić Bogojević Mirta , Ečimović Sandra , Mikuška Alma
Published: May 2023

The present study assessed the effect of agricultural practices on biomarker response in white stork (Ciconia ciconia) nestlings from continental Croatia. During the breeding season of 2022, blood was sampled (n = 54) from the landfill Jakuševec and the agricultural areas Baranja and Srijem. Different patterns of biomarker response in regard to the sampling site were detected. Results demonstrate the presence of inhibitory pollutants from the landfill Jakuševec and agricultural area Baranja, which is reflected in lower cholinesterase (ChE) activity. Oxidative stress biomarkers show different responses concerning study sites. Glutathione reductase (GR) activity was higher in Baranja and Srijem, suggesting a different mixture of pollutants inducing an antioxidative response. Leachate from the landfill Jakuševec is suspected to affect the white stork nestlings by elevating the concentrations of reactive oxygen species (ROS). An environmental combination of pollutants appears to induce oxidative stress in white stork nestlings. In addition to agricultural practices, white stork nestlings may also be under environmental pressure from the surrounding pollution. Further research is warranted to include additional chemical analysis to associate the environmental concentrations with the potential adverse effects in apex predators, such as the white stork.
Irrigation Alternatives for Avocado (Persea americana Mill.) in the Mediterranean Subtropical Region in the Context of Climate Change: A Review
Authors: Cárceles Rodríguez Belén , Durán Zuazo Víctor Hugo , Franco Tarifa Dionisio , Cuadros Tavira Simón , Sacristan Pedro Cermeño , García-Tejero Iván Francisco
Published: May 2023

Due to congenital features, avocado (Persea americana Mill.) trees are substantial water users relative to other fruit trees. The current growing deficiency of water resources, especially in arid and semi-arid avocado-producing areas, has led to the demand for more sustainable water-saving measures. The objective of this review was to analyze the role of deficit irrigation as a strategy to face climate change and water scarcity through achieving efficiency, saving water, and maximizing the benefits that could be achieved at the level of the irrigated agricultural system. Particular attention is devoted to studies performed in the subtropical Mediterranean climate, in which irrigated avocado orchards are common. These studies analyzed irrigation demand, deficit irrigation, and determination of water status through physiological parameters, leading to possible sustainable irrigation programs for avocado in the context of water shortage scenarios. Through these insights, we conclude that under the current climatic circumstances with respect to available water resources, avocado farming requires sustainable resilience strategies to reduce irrigation water consumption without affecting the yield and quality of the fruits. Water stress inevitably affects the physiological processes that determine yield. Therefore, an admissible yield loss is required with smaller fruits and water savings made through deficit irrigation strategies. In addition, modern consumers tend to prefer foods based on sustainability, i.e., there is a high demand for socially responsible and environmentally friendly products.
Development and Assessment of a Field-Programmable Gate Array (FPGA)-Based Image Processing (FIP) System for Agricultural Field Monitoring Applications
Authors: Antora Sabiha Shahid , Chang Young K. , Nguyen-Quang Tri , Heung Brandon
Published: May 2023

Field imagery is an effective way to capture the state of the entire field; yet, current field inspection approaches, when accounting for image resolution and processing speed, using existent imaging systems, do not always enable real-time field inspection. This project involves the innovation of novel technologies by using an FPGA-based image processing (FIP) device that eliminates the technical limitations of the current agricultural imaging services available in the market and will lead to the development of a market-ready service solution. The FIP prototype developed in this study was tested in both a laboratory and outdoor environment by using a digital single-lens reflex (DSLR) camera and web camera, respectively, as the reference system. The FIP system had a high accuracy with a Lin’s concordance correlation coefficient of 0.99 and 0.91 for the DLSR and web camera reference system, respectively. The proposed technology has the potential to provide on-the-spot decisions, which in turn, will improve the compatibility and sustainability of different land-based systems.
Study on the Mechanism of Grafting to Improve the Tolerance of Pepper to Low Temperature
Authors: Long Huijun , Li Ziyu , Suo Huan , Ou Lijun , Miao Wu , Deng Wenqiao
Published: May 2023

Pepper is a horticultural crop that does not tolerate low temperatures. To investigate how the grafted pepper responds to low temperature stress in the short term, transcriptome analysis was performed on grafted seedlings treated with low temperature for 1 h, 4 h, 12 h and 24 h compared with those treated for 0 h. The results showed that genes related to CAM4, MPK8, RbohD and OXI1 might be related to the response of grafted seedlings to low temperature stress in the short term. To investigate how low temperature tolerant rootstocks can improve the low temperature tolerance of grafted peppers, morphological and physiological indices of self-rooted and grafted seedlings were analyzed under low temperature conditions for different days. The results showed that the degree of wilting, REL and MDA content of grafted seedlings were significantly lower than those of self-rooted seedlings, and the antioxidant enzyme activities were significantly higher than those of self-rooted seedlings under low temperature stress. The results indicated that grafted pepper would activate ROS-related genes in a short period of time after low temperature stress and produce a large amount of ROS in response to the low temperature stress. When ROS accumulated to a certain level, the grafted pepper could increase the enzyme activity of antioxidant system to remove the ROS produced in the body, and help the pepper seedlings adapt to low temperature stress through osmoregulation mechanism, so as to resist the damage caused by low temperature. The results of the study provide ideas for growing pepper in low temperature environment.
Artificial Pollination Technologies: A Review
Authors: Broussard Melissa A , Coates Michael , Martinsen Paul
Published: May 2023

Pollination is critical for the production of many crops, and both insect- and wind-based pollination systems are increasingly disrupted by bloom asynchrony, weather events, and high demand for available insect pollinators. Artificial pollination systems can provide a security of yield even in poor pollination scenarios, and have been attracting increasing attention over the past decade. Here, we review pollen collection and pollen application technologies that have been employed to date. Major categories of mechanical pollination technology include: hand-pollination, handheld and backpack devices, vehicle-mounted devices, unmanned aerial vehicles (UAVs), and robotic and autonomous pollinators. The majority of the artificial pollination systems above are used to supplement natural pollination, but for some crops, these systems were found to perform adequately by themselves, including kiwifruit, olive, date palm, walnut, tomato, and hybrid maize seed. These systems often treat pollen as a system input, creating a chicken-and-egg problem in which the system is not economical without pollen and the pollen is not economical to collect without wide uptake of the system. To combat this, there has been success in developing mechanical harvesters for some crop plants (particularly almond and maize), but future work is needed for artificial pollination to be a commercial reality for the increasing number of cropping systems that are experiencing pollination deficits.
Breeding Dual-Purpose Maize: Grain Production and Biofuel Conversion of the Stover
Authors: Gesteiro Noemi , Butrón Ana , Santiago Rogelio , Gomez Leonardo D. , López-Malvar Ana , Álvarez-Iglesias Lorena , Revilla Pedro , Malvar Rosa Ana
Published: May 2023

The improvement of maize double cropping has become increasingly important in recent years. In order to establish breeding programs for sustainable maize production, the goals of the research were (i) to understand the correlations between grain and stover yield and saccharification efficiency, and (ii) to identify QTL and metabolic pathways to design of breeding programs in a double exploitation approach. We carried out a genome-wide association study (GWAS) and a metabolic pathway analysis using a panel of highly diverse maize inbreds. As results, we have obtained that the regulation of energetic and developmental pathways have been pointed out as key pathways related to stover quantity and utilization, while no specific pathways could be identified in relation to grain yield. However, due to the moderate high heritability of yields and their positive correlation a phenotypic selection approach would be adequate for the improvement of both yields, while for saccharification efficiency improvement upcoming genomic selection models are more advisable. Overall, breeding strategies that manage the dual use of maize are viable and will contribute to a more sustainable maize crop in the near future.
A Comparative Transcriptome Analysis of Avocado Embryogenic Lines Susceptible or Resistant to Rosellinia necatrix Exudate
Authors: Moreno-Pérez Ana , Zumaquero Adela , Martínez-Ferri Elsa , López-Herrera Carlos , Pliego-Alfaro Fernando , Palomo-Ríos Elena , Pliego Clara
Published: May 2023

Avocado embryogenic cultures were selected for resistance to the culture filtrate (CF) of Rosellinia necatrix, the causal agent of White Root Rot disease. A resistant callus line was obtained through recurrent selections in progressively increasing concentrations of fungal CF (from 60% to 80%). RNA sequencing (RNA-Seq) technology was used to compare the transcriptomic profiles of the avocado embryogenic-callus-resistant line L3 (capable to survive in the presence of 80% CF) and control line AN-9 (not exposed to CF), after 24 h of growth in a medium containing 40% CF. A total of 25,211 transcripts were obtained, of which 4,918 and 5,716 were differentially expressed in the resistant and control line, respectively. Interestingly, exposure of embryogenic callus lines to 40% of R. necatrix exudates induced genes previously reported to be related to avocado defense against fungal diseases (lignin biosynthesis, Pathogenesis Related (PR) proteins, WRKY (WRKYGQK) Transcription Factor (TF), NAC (NAM, ATAF1/2, and CUC2) TF, proteinase inhibitors and Ethylene Response Transcription Factor (ERF), among others), which were accumulated in greater amounts in the resistant line in comparison to the susceptible one. This research will contribute to the understanding of avocado defense against this pathogen, thereby aiding in the selection of resistant avocado rootstocks.
Effects of Mineral Fertilization and Organic Amendments on Rice Grain Yield, Soil Quality and Economic Benefit in Newly Cultivated Land: A Study Case from Southeast China
Authors: Si Linlin , Xu Jing , Cao Kai , Zhang Xian , Han Kefeng , Wang Jianhong
Published: May 2023

Low soil fertility and low microbiological activity have been widely observed in certain newly cultivated lands. To develop effective agricultural management practices that can improve soil quality rapidly, a field experiment was conducted on paddy fields reclaimed from unused, low-slope, hilly wasteland in Quzhou City, Zhejiang Province, Southeast China. The six treatments that were applied included (1) control (CK), no crops were planted and no fertilizers were applied; (2) R, rice planted without fertilization; (3) RR, rice–ryegrass rotation without fertilizer application; (4) RRM, rice–ryegrass rotation with the application of mineral fertilizer; (5) RRMO, rice–ryegrass rotation with the application of mineral fertilizer and organic manure; and (6) RRMH, rice–ryegrass rotation with mineral fertilizer and humic acid application. The results showed that the application of fertilizer with ryegrass cropping improved the amounts of soil organic C (SOC) by 115–296% and particulate organic C (POC) by 162–256% (p < 0.05). Additionally, the RRMO treatment had the highest soil quality index value (0.81), which was significantly higher (p < 0.05) than that of the other treatments. The random forest model showed that N-related properties (including urease activity, total N, and particulate organic N), C-related properties (including SOC, POC, and cellulase activity), and available P could significantly (p < 0.05) explain the response of rice yield to different fertilization management strategies. Compared with CK, the cultivated land quality grades of RRMO and RRMH increased from Grade 9 to Grade 7. However, the RRMH obtained the highest net profit from farmland quota trading. Overall, RRMO and RRMH are suggested to rapidly improve soil productivity and maximize the economic benefit of newly cultivated land utilization, respectively.