bluuebunny/crossref_metadata_2025 huggingface dataset:
Microanatomy of the antennal glands and their Na+/K+-ATPase activity in three true crab species (Brachyura), Portunus pelagicus (Linnaeus, 1758) (Portunidae), Macrophthalmus dentipes Lucas in Guérin, 1836 (Macrophthalmidae) and Eriocheir hepuensis Dai, 1991 (Varunidae)
Authors: Khalifi Khadijeh , Salamat Negin , Movahedinia Abdolali
Published: January 2022

There are differences between various crab species in the function and structure of organs involved in ionic and osmotic regulation processes. The antennal glands together constitute one of the most important organs involved in the osmoregulation in crabs. The present investigation aimed to study the tissue structure of the antennal glands and their Na+/K+-ATPase (NKA) pump activity in three true crab species from three different habitats, including the marine (Portunus pelagicus (Linnaeus, 1758)), the estuarine (Macrophthalmus dentipes Lucas in Guérin, 1836) and the freshwater habitat (Eriocheir hepuensis Dai, 1991). In this regard, the tissue structure of the antennal glands and the activity of the Na+/K+-ATPase (NKA) pump were assessed in these three selected species. The results showed that the antennal glands in all studied species consisted of two anterior parts and a posterior part. The anterior parts are composed of the proximal tubular region (PT) and the distal tubular region (DT). The PT and DT parts comprised the coelomosac and labyrinths in the anterior portion, and the bladder located in the posterior portion. However, despite the similarity in the general tissue structure of the antennal gland in marine, estuarine and freshwater crab species, some structural differences were observed between those species. Labyrinth cells, coelomosac podocytes, and bladder cells in the estuarine crab M. dentipes contained large vacuoles especially on the top (i.e., near the lumen) of the cells. The highest amount of NKA pump activity was measured in the antennal glands of M. dentipes (). The NKA pump plays a more important role in the estuary and seawater adaptation of crabs, but freshwater species are not highly dependent on the NKA enzyme for osmoregulation.
A new species of Eusirus (Amphipoda, Amphilochidea, Eusiridae) described from a hydrothermal vent in the Okinawa Trough, North-West Pacific
Authors: Wang Yanrong , Sha Zhongli , Ren Xianqiu
Published: January 2022

A new species of Eusiridae, Eusirus liui sp. nov. is described from a hydrothermal vent on Okinawa Trough, North-West Pacific. The new species differs from the other 30 congeneric species mainly by the following combination of characters: the acute rostrum reaching to 1/3 the length of peduncular article 1 of antenna 1; the absence of eyes; pleonite 3 without acute protrusion on dorsal margin, and the posterior margin of epimeron 3 with 18 serrations. A key to all known Eusirus species is provided herein. This is the fourth species within the Eusiridae that has been found from vent fields.
Allometry of the box crab Calappa convexa De Saussure, 1853 (Brachyura, Calappidae) in the southeastern Gulf of California
Authors: Arvizu-Merín Carlos A. , Arzola-González Juan F. , Félix-Ortiz José A. , Rodríguez-Domínguez Guillermo , Marín-Enríquez Emigdio , Aragón-Noriega E. Alberto
Published: January 2022

The relative growth of Calappa convexa can be used to identify dimorphism or morphological change related to sexual maturation. The carapace width (CW) against width and length of the propodus of the right and left cheliped were tested to obtain a coefficient of allometry. CW against total wet weight WT values were analysed for length-weight relationships (LWR). Relative growth was analysed by a multi-model approach. Five models were tested and the best was selected due to the greater weight of the Akaike criterion (). Significant differences between sexes were found in CW (, ) and WT (, ). The negative or positive allometry varied according to the morphometric relationship and sex. No real winner model () was observed in the LWR analysis under a multi-model approach. The average model estimated a breakpoint at 118 mm CW in males and 132 mm CW in females.
Presence of Conchoderma auritum and C. virgatum (Maxillopoda, Lepadidae) and Gloiopotes huttoni (Copepoda, Caligidae) on the black marlin, from the Gulf of Tehuantepec, Mexico
Authors: Anislado-Tolentino Vicente , Del Moral-Flores Luis F. , Wakida-Kusunoki Armando T. , del S. Andrade-González Zullette
Published: January 2022

This is the first report of coexistence of pedunculate barnacles, Conchoderma auritum and C. virgatum in the mouth, and with the copepod Gloiopotes huttoni in the precaudal zone, on the black marlin, Istiompax indica, a as host. This is also the first note of a new non-mammalian host for C. auritum. The host specimen was caught in sport fishing in the Gulf of Tehuantepec, eastern Pacific. A review of registered occurrences of the genus Conchoderma in species of the fish family Istiophoridae is provided.
Investor Due Diligence and Legitimate Expectations
Authors: Matos Shaun
Published: January 2022

This article examines the significance of investor due diligence in the context of a claim that a host State has breached its obligation to provide fair and equitable treatment (FET). Despite increasing reliance on due diligence exercises, there are considerable differences in how tribunals understand and use such exercises. These differences are related to different visions of the function and future of international investment law. After exploring the different approaches that are taken, this article will argue that the most coherent approach is to treat investor due diligence as merely a technique for assessing investor reasonableness and prudence, rather than a strict requirement.
Jurisdiction and Applicable Law in the Settlement of Marine Environmental Disputes under UNCLOS
Authors: Nguyen Lan Ngoc
Published: January 2022

Part XII of the United Nations Convention on the Law of the Sea (UNCLOS) on the protection and preservation of the marine environment contains provisions that are worded in a general manner. As “the problems of ocean space are closely interrelated and need to be considered as a whole”, these provisions need to be interpreted in harmony with the wider corpus of international law. However, when marine environmental disputes are brought before the UNCLOS dispute settlement bodies, their jurisdiction is limited to disputes arising under UNCLOS. The tribunals, therefore, have to navigate between deciding disputes in a hollistic manner and remaining within their jurisdictional limits. This article discusses the techniques used by UNCLOS tribunals to resort to other sources of international law when settling marine environmental disputes. It will then assess whether, in doing so, the tribunals have remained within their jurisdictional parameters and the wider implications of this practice.
Cultural Influences on Opinion Expression in an Online and Offline Context
Authors: Al-Sumait Fahed , Frederick Edward , Al-Kandari Ali , Sharif Ahmad
Published: January 2022

This study compares the expression of opinion in incongruent offline and online settings regarding the issue of gender desegregation in Kuwait’s public schools. Spiral of silence theory provides the theoretical foundation for examining the impact of certain cultural factors and religious influences on the expression of opinion, their relationship to the fundamental tenets of the theory, such as fear of social isolation, and Twitter use variables among respondents to a survey. The results to a questionnaire administered to 534 public and private university students indicate greater overall expression of opinion in the offline than online context. Offline and online, the nonconformist personality variable was a positive predictor of expression of opinion, and fear of social isolation was a negative predictor. The perceived position of Islam on the issue was a predictor of expression of opinion only in the offline context. Finally, daily average use of Twitter was an additional predictor of expression of opinion in the online environment.
Asiatic Acid Encapsulated Exosomes of Hepatocellular Carcinoma Inhibit Epithelial-Mesenchymal Transition Through Transforming Growth Factor Beta/Smad Signaling Pathway
Authors: Chen Tianming , Zhu Changhao , Wang Xing , Pan Yaozhen , Huang Bin
Published: January 2022

Hepatocellular carcinoma (HCC) is one of the leading causes of cancer-related death in many countries, which accounts for more than 80% of primary liver cancers. Better understanding of the biology of HCC and more therapeutic strategies are urgently needed to improve the current situation.
Exosomes, lipid-bound particles derived from cells, have been revealed to play versatile roles in mediating communication between tumor and its microenvironment. Thus, exosomes could act as potential drug delivery systems in cancer treatment. This study aimed to investigate the effect of asiatic
acid (AA)-loaded exosomes on the proliferation and migration of HCC cells and clarify the underlying mechanisms. HCC cells were treated with AA-loaded exosomes and cell vitality, migration and invasion were examined. Compared with free AA, AA-loaded exosomes significantly reduced cell vitality,
migration, invasion and epithelial mesenchymal transition (EMT). And the inhibition was enhanced as AA concentration went up. Moreover, the expression of proteins involved in EMT and TGF-β/Smad pathway such as TGF-β1, Smad4 and Vimentin were decreased while E-cadherin
was up-regulated. Collectively, these findings demonstrate that HCC derived exosomes display as potential drug delivery vehicles in HCC treatment. And AA-loaded exosomes might work by inhibiting EMT through inactivating TGF-β/Smad pathway.
Modeling the Effects of Chemotherapy and Immunotherapy on Tumor Growth
Authors: El Haout Sara , Fatani Maymunah , Farha Nadia Abu , AlSawaftah Nour , Mortula Maruf , Husseini Ghaleb A.
Published: January 2022

Mathematical modeling has been used to simulate the interaction of chemotherapy and immunotherapy drugs intervention with the dynamics of tumor cells growth. This work studies the interaction of cells in the immune system, such as the natural killer, dendritic, and cytotoxic CD8+ T cells, with chemotherapy. Four different cases were considered in the simulation: no drug intervention, independent interventions (either chemotherapy or immunotherapy), and combined interventions of chemotherapy and immunotherapy. The system of ordinary differential equations was initially solved using the Runge-Kutta method and compared with two additional methods: the Explicit Euler and Heun’s methods. Results showed that the combined intervention is more effective compared to the other cases. In addition, when compared with Runge-Kutta, the Heun’s method presented a better accuracy than the Explicit Euler technique. The proposed mathematical model can be used as a tool to improve cancer treatments and targeted therapy.
Operative Management Considerations in a Patient With Multiple Occult Penetrating Cardiac Injuries
Authors: Portelli Tremont Jaclyn N , Ward Andrea , Motameni Amirreza
Published: January 2022

Penetrating cardiac injury remains one of the deadliest traumatic injuries. Early identification and definitive operative management are critical tenets for patient survival; however, variable clinical presentations can obscure the diagnosis. Here, we present the case of a 58-year-old obese man who presented to an urban level 1 trauma center with multiple stab wounds to the epigastrium and lateral left chest in the axillary line with an unknown weapon. The patient was taken emergently to the operating room for exploratory laparotomy, median sternotomy, and attempted repair of multiple full-thickness lacerations of the right ventricle and left and right atrium. This case demonstrates several instructive points. First, a high index of suspicion for penetrating cardiac injury is needed, especially during triage of multiple injuries. Second, careful release of cardiac tamponade is critical. Finally, there are several indications for cardiopulmonary bypass, which include multichambered injuries, uncontrollable hemorrhage, and concern for intracardiac injury.
Crotalidae Polyvalent Immune Fab and Cost-Effective Management of Hospital Admissions for Snakebites
Authors: Bowden Mallory B. , Christie Dudley B. , Hand Kelly H. , Montgomery Anne
Published: January 2022

Background

Venomous snakebites are a common clinical scenario in the Southeastern United States. CroFab® (Crotalidae Polyvalent Immune Fab (Ovine), BTG, Wales, UK) antivenom is indicated in cases involving pit vipers and is known to be expensive. The treatment protocol for snakebites is based on clinically subjective measures triggering the application, or escalation of, antivenom administration. The purpose of this study is to characterize the use of CroFab at our institution and to evaluate the impact of its use regarding cost and overall outcomes. We suspect that it is often used but potentially less often needed. We hypothesized that CroFab use was associated with increased length of stay (LOS) without an observed difference in patient outcomes.

Materials and Methods

A retrospective chart review of snakebite patients at our level-1 trauma center from 2000 to 2016 was performed. Snakebite location, snake species, number of vials of CroFab administered, hospital LOS, intensive care unit (ICU) LOS, and complications were identified for each patient. Patients were divided into CroFab (C) and no CroFab (NC) groups.

Results

One hundred ninety patients with venomous snakebites were included. 53.7% of patients received CroFab. There was no difference in the complication rate of C versus NC groups, ( P = .1118). CroFab use was associated with longer hospital LOS ( P < .0001) and ICU LOS ( P < .0001).

Discussion

CroFab use was associated with increased LOS in our patient population. There was no difference in observed outcomes between the C and NC groups. These findings imply that CroFab is potentially over-used in our patient population.
Is It Beneficial to Optimize Vital Signs Before Embolization for Pelvic Fractures? A Dilemma Between Resuscitation and Hemostasis
Authors: Kuo Ling-Wei , Wang Chen-Yu , Liao Chien-An , Wu Yu-Tung , Liao Chien-Hung , Hsieh Chi-Hsun , Fu Chih-Yuan
Published: January 2022

Purpose

Adequate resuscitation and definitive hemostasis are both important in the management of hemorrhage related to pelvic fracture. The goal of this study was to analyze the relationship between the amount of blood transfused before transcatheter arterial embolization (TAE) and the clinical outcome later in the disease course.

Methods

Patients with pelvic fractures who underwent TAE for hemostasis from January 2018 to December 2019 were studied. The characteristics of patients who received blood transfusions of >2 U (1000 mL) and ≤2 U before TAE were compared. The mortality rate, blood transfusion-related complications, and length of stay were compared between these two groups.

Results

Among the 75 studied patients, 39 (52.0%) received blood transfusions of ≤2 U before TAE, and the other 36 (48.0%) patients received blood transfusions of >2 U before TAE. The incidence rates of systemic inflammatory response syndrome, sepsis, and coagulopathy were significantly higher in the >2 U group (97.2% vs 81.1%, P = .027; 50.0% vs 27.0%, P = .045; and 44.4% vs 5.4%, P < .01, respectively). After nonsurvivors were excluded, the >2 U group had a significantly higher proportion (43.8% vs 14.7%, P < .001) of prolonged intensive care unit (ICU) length of stay (7 days or more) and a longer hospital length of stay (33.8 ± 15.1 vs 21.9 ± 94.0, P < .01) than the ≤2 U group. Pre-TAE blood transfusion >2 U serves as an independent risk factor for prolonged ICU length of stay and increased hospital length of stay.

Conclusion

Early hemostasis for pelvic fracture-related hemorrhage is suggested to prevent pre-TAE blood transfusion-associated adverse effects of blood transfusion.
Contraband Hospital, Freedmen’s Hospital, and Alexander Augusta
Authors: Nakayama Don K.
Published: January 2022

The tens of thousands of enslaved Blacks liberated by union forces during the American Civil War were considered seized property and thus were referred to as contraband. As wartime refugees they sought protection in federal military installations, popularly known as contraband camps, located throughout the occupied South. One of the largest was Camp Baker in the rural northwestern sector of Washington, DC, where about 40,000 persons were sheltered. To provide basic medical care, the military outfitted, in 1863, an infirmary called the Contraband Hospital, later renamed Freedmen’s Hospital. From its founding in 1867 the medical department of Howard University was attached to Freemen’s Hospital, which in 1975 was renamed the Howard University Hospital, the two institutions establishing a long partnership of medical education and hospital care that continues to the present day.
Outcomes of Early Versus Delayed Completion Thyroidectomy for Malignancy
Authors: Park Jaimie J. , Frank Ethan , Simental Alfred A. , Park Joshua S. , Kim Stephanie , Imperio-Lagabon Kristelle , Van der Werf Owen
Published: January 2022

Purpose

To determine whether time interval between hemi-thyroidectomy and subsequent completion thyroidectomy impacts outcomes.

Methods

Retrospective review of 68 patients having completion thyroidectomy from August 2012 to December 2019. Patients were separated into two groups based on the time interval between surgeries: early (≤10 days) or delayed (≥90 days).

Results

Patients who underwent delayed completion thyroidectomy (n = 17) had significantly higher rates of hypocalcemia and/or hypoparathyroidism ( P = .03) and higher rates of requiring postoperative hospitalization ( P=.07) compared to those who underwent early completion thyroidectomy (n = 51). Delayed completion had significantly lower risk of developing one or more of dysphonia, dysphagia, or vocal cord paresis postoperatively ( P=.02). No patients developed hematoma or wound infection.

Conclusions

Delayed completion thyroidectomy is associated with increased rates of hypocalcemia, but lower rates of dysphonia and dysphagia. Given the low risk of long-term complications in both groups, it may be beneficial to perform completion thyroidectomy early in order to expedite cancer treatment.
Urgent Breast-Related Consults Seen by Acute Care Surgery at a Safety Net Hospital
Authors: Sargent Rachel E. , Schellenberg Morgan , Owattanapanich Natthida , Chen Allen , Chen Eric , Sener Stephen F. , Inaba Kenji
Published: January 2022

Background

Classically, urgent breast consults are seen by Breast Surgery or Surgical Oncology (BS/SO). At our safety net hospital, Acute Care Surgery (ACS) performs all urgent surgical consultations, including initial assessment of breast consults with coordinated BS/SO follow-up. The objective was to determine safety of ACS initial assessment of acute breast pathology.

Methods

All urgent breast-related consultations were included (2016-2019). Demographics, consult indications, and investigations/interventions were captured. Outcomes were compared between patients assessed by ACS versus both ACS and BS/SO at presentation.

Results

234 patients met study criteria, with median age 39 years. Patients were primarily Hispanic (82%) women (96%). Most were not seen by BS/SO at presentation (69%), although BS/SO assessment was more frequent among patients ultimately diagnosed with cancer (8% vs 1%, P = .012). No patient had delay >90 days to core biopsy from presentation. Outcomes including time to cancer diagnosis (14 vs 8 days, P = .143) and outpatient BS/SO assessment (16 vs 13 days, P = .528); loss to follow-up (25% vs 21%, P = .414); and ED recidivism (24% vs 18%, P = .274) were comparable between patients seen by ACS versus ACS/BS/SO at index presentation.

Conclusion

Urgent breast consults at our safety net hospital typically underwent initial assessment by ACS with outpatient evaluation by BS/SO. Time to follow-up and cancer diagnosis, loss to follow-up, and ED recidivism were similar after index presentation assessment by ACS versus ACS and BS/SO. In a resource-limited environment, urgent breast consults can be safely managed in the acute setting by ACS with coordinated outpatient BS/SO follow-up.
The Economic Effects on Acute Care Surgery in a New York City Public Hospital During the COVID Pandemic
Authors: Moghadamyeghaneh Zhobin , Ojo Adedolapo , Rahimi Murwarid , Kopatsis Anthony Paul , Kopatsis Katherine , Kopatsis Anthony
Published: January 2022

Background

Since the start of the COVID-19 pandemic, less acute care surgical procedures have been performed and consequently hospitals have experienced significant revenue loss. We aim to investigate these procedures performed before and after the start of the COVID-19 pandemic, as well as their effect on the economy.

Methods

This is a retrospective analysis of patients who underwent cholecystectomies and appendectomies during March–May 2019 compared to the same time period in 2020 using Chi-square and t-tests.

Results

There were 345 patients who presented with appendicitis or cholecystitis to Elmhurst Hospital Center during the March–May 2019 and 2020 time period. There were three times as many total operations, or about 75%, in 2019 (261) compared to 2020 (84). There was a decrease in the number of admissions from 2019 to 2020 for both acute cholecystitis (149 vs 43, respectively) and acute appendicitis (112 vs 41, respectively). The largest decrease in the number of admissions in 2020 compared to 2019 was observed in April 2020 (98 vs 9, P < .01) followed by May [69 vs 20, P < .01], and March [94 vs 55, P < .01]. Corresponding to the decrease in operative patterns was a noticeable six-time reduction in revenue for the procedures in 2019 ($187,283) compared to 2020 ($30,415).

Conclusion

We observed almost a triple reduction in the number of cholecystitis and appendicitis procedures performed during the 2020 pandemic surge as compared to the 2019 pre-pandemic data. Elmhurst hospital also experienced four times the loss of revenue during the same time period.
Comparing student motivations for and emotional responses to national standardised tests and internal school tests: The devil in the detail
Authors: Dowley Mark , Rice Suzanne
Published: January 2022

National testing of students has become an increasingly prevalent policy tool, often implemented to drive improvement through increased accountability and heightened competition between schools. Such testing has been found to generate negative emotional responses among students, including increased stress and anxiety . However, there is little examining whether such responses are associated specifically with national testing regimes or are more general responses to testing situations. This study surveyed 206 students in Australian secondary schools to compare responses to NAPLAN and internal school tests. Students reported higher expectations for their performance in internal school tests than for NAPLAN, higher levels of boredom for NAPLAN and greater levels of confidence for their internal school tests. While most students reported low levels of negative emotional responses to NAPLAN, a small group of students reported strong negative emotional responses to both NAPLAN and internal school tests, suggesting that negative responses to national testing programs may be more dependent on the individual student.
Force Control Strategy of Five-Digit Precision Grasping With Aligned and Unaligned Configurations
Authors: Chen Po-Tsun , Hsu Hsiu-Yun , Su You-Hua , Lin Chien-Ju , Chieh Hsiao-Feng , Kuo Li-Chieh , Su Fong-Chin
Published: January 2022

Objective

To investigate the digit force control during a five-digit precision grasp in aligned (AG) and unaligned grasping (UG) configurations.

Background

The effects of various cylindrical handles for tools on power grasp performance have been previously investigated. However, there is little information on force control strategy of precision grasp to fit various grasping configurations.

Method

Twenty healthy young adults were recruited to perform a lift-hold-lower task. The AG and UG configurations on a cylindrical simulator with force transducers were adjusted for each individual. The applied force and moment, the force variability during holding, and force correlations between thumb and each finger were measured.

Result

No differences in applied force, force correlation, repeatability, and variability were found between configurations. However, the moments applied in UG were significantly larger than those in AG.

Conclusion

The force control during precision grasp did not change significantly across AG and UG except for the digit moment. The simulator is controlled efficiently with large moment during UG, which is thus the optimal configuration for precision grasping with a cylindrical handle. Further research should consider the effects of task type and handle design on force control, especially for individuals with hand disorders.

Application

To design the handle of specific tool, one should consider the appropriate configuration according to the task requirements of precision grasping to reduce the risk of accumulating extra loads on digits with a cylindrical handle.
The rules of the game: Healthcare systems and cross-national attitudes about healthcare provision
Authors: Curran Michaela , Cready Cynthia , Kwon Ronald
Published: January 2022

In recent years, healthcare typologies are increasingly scrutinized. Prevailing healthcare system categorizations draw on comparative–institutional welfare state arrangements that constitute the “rules of the game” for healthcare provision. Challenging these perspectives, health policy perspectives suggest that ongoing policy changes shifted the “rules of the game” in ways that are not adequately captured by traditional comparative–institutional typologies. As a result, new questions arise about which categorization is most salient for understanding public attitudes about healthcare. We adjudicate between these two perspectives by examining the association between healthcare system typology and two different and important types of attitudes about healthcare provision: government responsibility and spending. Using hierarchical linear models, we find that traditional welfare state conceptions of healthcare systems are more closely associated with public opinions about healthcare provision. In general, respondents in countries with healthcare systems that have greater state involvement and rely more on public financing, which are traditional, institutional–comparative factors, report greater support for government responsibility in and spending on healthcare. We highlight how rallying broad public support for changes to healthcare systems in the wake of the COVID-19 pandemic will require that researchers and policy makers understand what the public has come to expect about healthcare, as well as the institutional arrangements around healthcare that set the “rules of the game.”
Life-Threatening Stridor due to Laryngeal Tuberculosis in the COVID-19 Era: Report of a Case
Authors: Valjarevic Svetlana , Radaljac Dejan , Miladinovic Nenad
Published: January 2022

Laryngeal tuberculosis is the most frequent granulomatous disease of the larynx and it is prone to be diagnosed as cancer. COVID-19 pandemic caused considerable disruption in tuberculosis service provisions both in the primary care and hospital settings. This report describes a rare case of life-threatening stridor in a patient who presented with an ulceroproliferative laryngeal mass later confirmed as laryngeal tuberculosis. Urgent tracheostomy was performed. The patient’s sputum and the computed tomography of the chest revealed a pulmonary, as well as laryngeal tuberculosis. The patient was commenced on a 24 week course of anti-tuberculous treatment which was interrupted because of a mild course of hospital-acquired coronavirus infection. 3 months after initial treatment for tuberculosis, his sputum cultures became negative. Flexible laryngoscopy was performed at our department 4 months after commencement of treatment, demonstrating complete regression of the lesion and symmetrical laryngeal mobility, hence the patient was successfully decannulated and discharged to be followed up to his community hospital. In the time of COVID-19 pandemic, we should never underestimate other severe infectious diseases.
Early Adolescents’ Social Goals in Peer Conflict Situations: A Mixed Methods Study
Authors: Dunn Courtney B , Pittman Sarah K , Mehari Krista R , Titchner Denicia , Farrell Albert D
Published: January 2022

Identification of goals is a key social-cognitive process that guides whether adolescents engage in aggressive or nonviolent behavior during social conflicts. This study investigated early adolescents’ goals in response to hypothetical social conflict situations involving close friends and peers. Participants ( n = 160; Mage = 12.7, 53% female) were 7th graders from two urban and one rural middle school. On average, participants identified 2.5 goals for each situation. Qualitative analysis using a grounded theory approach identified nine themes representing the goals generated by participants: instrumental-control, relationship maintenance, maintain image and reputation/self-defense, conflict avoidance, seek more information, revenge, tension reduction, moral, and stay out of trouble. Quantitative analysis indicated that female participants identified more goals than male participants, but there were few differences in their types of goals. There were few differences across school sites. The findings highlight the variety of social goals specific to the developmental period of early adolescence.
Cross-continental hydroclimate proxies: Tree-rings in Central Chile reconstruct historical streamflow in Southeastern South American rivers
Authors: Lucas Christine , Aguilera-Betti Isabella , Muñoz Ariel A , Puchi Paulina , Sapriza Gonzalo , Profumo Ludmila , Maxwell R Stockton , Venegas-González Alejandro
Published: January 2022

Regional teleconnections permit cross-continental modeling of hydroclimate throughout the world. Tree-rings are a good hydroclimatic proxy used to reconstruct drought and streamflow in regions that respond to common global forcings. We used a multi-species dataset of 32 tree-ring width chronologies from Chile and Uruguay as a climate proxy to infer annual streamflow (Q) variability in the Negro River basin, a grassland-dominated watershed of lowland Southeastern South America. A positive linear correlation between tree-ring chronologies from Central Chile and annual Negro River instrumental streamflow from 1957 to 2012 indicated a cross-continental teleconnection between hydroclimate variability in Central Chile and Northeastern Uruguay. This relationship was mediated in part by the El Niño Southern Oscillation (ENSO), whereby the El Nino 3.4 Index was positively correlated with regional rainfall, annual tree growth, and Q anomalies. Despite the proximity of Uruguayan tree-ring chronologies to Negro River hydrometric stations, the Chilean tree-ring chronologies best predicted annual streamflow. Thus, using tree-ring data from four long-term moisture-sensitive chronologies of the species Cryptocarya alba in Central Chile (32–34°S), we present the first streamflow reconstruction (1890–2009) in the lower La Plata Basin. The reconstruction supports regional evidence for increasing frequency of extreme flood years over the past century in Uruguay. We demonstrate how climate teleconnections that mediate local hydroclimate variability permit the cross-continental reconstruction of streamflow, filling a major geographical gap in historical proxies for flooding and drought in grassland biomes of the southern hemisphere.
Field Performance Evaluation of High Polymer-Modified Asphalt Concrete Overlays
Authors: Habbouche Jhony , Boz Ilker , Diefenderfer Brian K. , Bowers Benjamin F.
Published: January 2022

The objective of this paper was to assess the viability of using high polymer (HP) modified asphalt concrete (AC) mixtures in Virginia as a reflective crack mitigation technique or when deemed appropriate as a tool for increased crack resistance on higher volume facilities. This was achieved by compiling and evaluating routine distress survey data against pre-paving distress survey data for relevant in-service HP pavements constructed between 2015 and 2018 and comparing them with several control in-service conventional polymer-modified asphalt (PMA) pavements. This is the first effort in North America to provide a detailed field performance of HP AC mixtures. In general, none of the evaluated mixtures (HP or PMA) was able to prevent reflective cracking completely. The HP sections showed the most promising performance 5 years after construction regardless of traffic level and the pre-existing pavement conditions. The pavement management system data for the reviewed sections indicated a potential controlling effect of the joint condition of the underlying jointed concrete pavement layer regardless of the asphalt mixture type employed (PMA or HP). Moreover, performance evaluations using the network-level pavement management data were conducted to estimate the life expectancy of HP AC overlays. Two different approaches and three levels of analysis were undertaken. Overall, PMA and HP AC overlays had an average predicted service life of 6.2 and 8.3 years, respectively, indicating a 34% extension of performance life of the AC overlays with high polymer modification.
Therapeutic interventions to urologic chronic pelvic pain syndrome and UPOINT system for clinical phenotyping: How far are we?
Authors: Naveed Muhammad , Changxing Li , Ihsan Awais Ullah , Shumzaid Muhammad , Kamboh Asghar Ali , Mirjat Ali Asghar , saeed Muhammad , Baig Mirza Muhammad Faran Ashraf , Zubair Hafiz Muhammad , Noreen Sobia , Madni Asadullah , Xiaohui Zhou
Published: January 2022

The assessment and management of urologic chronic pelvic pain syndrome (UCPPS), is controversial. It is classified by voiding symptoms, pelvic pain, and bladder pain, which is weekly treated, weekly understood, and bothersome. In the aspect of clinical efforts and research to help people with this syndrome have been hampered by the deficiency of a widely reliable, accepted, and a valuable tool to evaluate the patient symptoms and quality of life (QoL) impact. However, the etiology comes into sight is multifactorial, and available treatment options have been imprecise considerably in present years. We compiled the published literature on the assessment of the syndrome, a tentative role of pharmacological and non-pharmacological (conservative, alternative, and invasive therapy) interventions in eradicating the disease as well as improving symptoms. The previously published literature on animal models has established the association of immune systems in the etiology, pathogenesis, and progression of the disease. The UPOINT system for clinical phenotyping of UCPPS patients has six predefined domains that direct multimodal therapy, which would lead to significant symptom improvement in the medical field. The narrative review aims to scrutinize the fluctuating scientist’s views on the evaluation of patient and multimodal treatment of the UPOINT system.
Two-stage model of prepreg bonding interface formation in automated fiber placement process
Authors: Xiao Rui , Wang Wang , Shi Jiaqi , Xiao Jun
Published: January 2022

While Automated Fiber Placement (AFP) of thermoset matrix composites are widely used in the aviation industry, there is little conclusive research on the relationship between the physical model of bonding interface formation process and the actual bonding strength between prepreg layers formed in AFP process. Although massive amounts of experimental data on prepreg tack have been achieved from existing research, engineers are unable to use these data as a decisive criterion in choosing process parameters. In this research, a prepreg layup physical model based on reptation model and viscoelastic mechanical model is built, in which the bonding interface formation process is divided into two stages, namely, diffusion and viscous stage. Layup-peeling experiments are conducted via a special designed high-speed layup experimental platform so that practical AFP process parameters can be imitated, and a logarithmic curve of layup velocity-peeling energy under different layup pressure is achieved. The slope of the logarithmic curve and the surface morphology of the sample after peeling prove the correctness of the established model. Simultaneously, the experimental data proves that when prepreg is peeled off, the transition from the cohesive failure mode to the interface failure mode occurs at the laying speed between 100 mm/s and 200 mm/s. These results can be used as a reference for choosing AFP process parameters to realize the balance between good bonding quality and harmless separation of adjacent prepreg layers.
Measuring Math Anxiety Among Predominantly Underrepresented Minority Undergraduates Using the Abbreviated Math Anxiety Scale
Authors: Cho Kit W.
Published: January 2022

Many students experience math anxiety, which can negatively affect their academic achievement and even their career choices. One of the most commonly used methods to assess math anxiety is the Abbreviated Math Anxiety Scale (AMAS). Despite the ubiquity of this measure, there is a lack of studies assessing its validity. Moreover, almost all studies have administered the AMAS to a predominantly (>75%) White sample. The present study assessed the validity of the AMAS in a largely underrepresented minority-student (Hispanics and Blacks) sample. The construct validity of the scale was established by showing that students’ AMAS was predictive of both their actual (objective) and predicted (subjective) performance on an arithmetic task. The factor structure of the measure was validated by confirming that the two-factor model was a better fit than the one-factor model. Gender invariance was supported using multi-group confirmatory factor analyses. Overall, the results of the present study provide further evidence on the validity of the AMAS and its use among underrepresented minority college students.
Comparing Employer Attractiveness of Public Sector Organizations to Nonprofit and Private Sector Organizations: An Experimental Study in Germany and the U.S.
Authors: Cordes Jana , Vogel Rick
Published: January 2022

Sector preferences in job choice have rarely been tested empirically across different administrative systems. We address this gap and apply a between-subject experimental design to examine the attractiveness of public, private, and nonprofit employers in two countries in different administrative traditions. Respondents ( n = 362) from an Anglo-Saxon (i.e., the U.S.) and continental European country (i.e., Germany) were exposed to job advertisements that only differed in the employer’s sector affiliation, with other job attributes, such as payment and working hours, held constant. Contrary to expectations, and consistently across the two country samples, respondents evaluated public sector jobs more positively compared to vacancies in the private sector. In contrast, we found no such comparative advantage of public over nonprofit employers. By providing counterevidence to the prevalence of negative attitudes toward public organizations, our study warns against overgeneralizing previous findings on negativity biases to the context of employer attractiveness.
Experience, Emotion, and Exhaustion: How Unionization Influences Emotional Labor
Authors: Davis Randall S. , Stazyk Edmund C. , Kline Erika D. , Green Adam C.
Published: January 2022

While HRM scholars have built a rich body of knowledge regarding emotional labor (EL), we know comparatively less about the social origins of EL components and individual outcomes in government work contexts. To address this gap, we employ conservation of resources theory to examine how one prominent social institution within government organizations, labor unions, influence the process through which EL shapes one individual-level outcome, emotional exhaustion. We also draw from the process model of EL developed by Brotheridge and Lee to evaluate one specific countervailing resource, person-job fit. Results obtained using data from the 2016 U.S. Merit Principles Survey suggest that unionization indirectly increases emotional exhaustion via increases in the perceived need for false face acting. While unionization does not have a direct relationship with person-job fit, perceived increases in the need for false face acting contributes to emotional exhaustion by reducing person-job fit.
Big five personality traits and physician-certified sickness absence
Authors: Løset Gøril Kvamme , von Soest Tilmann
Published: January 2022

Although several studies show that personality traits are associated with absenteeism, few large-scale studies have examined these relationships prospectively, integrating survey data and register data on sickness absence. This study examines whether personality is associated with sickness absence, and whether health factors, gender, age, type of occupation and job satisfaction moderate this relationship. We combine survey data assessing the Big Five personality traits from a large sample of Norwegian employees aged 18–62 years ( N = 5017) with register data on physician-certified sickness absence up to four years after. Negative binomial regression analyses showed that extraversion was positively associated with subsequent sickness absence when controlling for several covariates, including health, work factors and previous spells of sickness absence. Neuroticism also showed significant positive associations with sick leave; however, the association diminished when accounting for previous spells of sickness absence. Moderator analyses demonstrated that age and type of occupation affected some of the associations between personality and sickness absence. The findings indicate that – in addition to general health promotion measures – specific interventions targeting individuals high in extraversion may be beneficial in reducing sick leave. How socio-demographic and work-related factors moderate the relationship between personality and sickness absence may be an interesting future research area.
Impact of collaborative, entrepreneurship education on the financial risk taken by university students
Authors: Tas Mehmet , Saydaliev Hayot Berk , Kadyrov Shirali
Published: January 2022

Based on the definition of entrepreneurship, entrepreneurs can be considered as risk-takers. The literature contains conflicting theories as to whether risk-taking can be influenced by external factors. The current paper investigates the effect of entrepreneurship education and collaborative environment on financial risk-taking behavior among university-age young people. To this end, an online survey was conducted involving 510 participants and various statistical tests were utilized to test the research hypothesis. To measure financial risk-taking propensity, the Choice Dilemma Questionnaire methodology was implemented. The results of the analysis reveal that both the level of entrepreneurship education and a collaborative environment increase financial risk-taking. Moreover, multiple linear regression methodology was used to capture the significant factors that influence financial risk-taking when investing alone and investing in a collaborative environment. As a policy recommendation, the authors suggest that an entrepreneurship training curriculum should be developed that incorporates the various activities and elements of a collaborative environment.
Effects of different thermal modes of obstacles on the natural convective Al2O3-water nanofluidic transport inside a triangular cavity
Authors: Acharya Nilankush
Published: January 2022

This study investigates the Al2O3-water nanofluidic transport within an isosceles triangular compartment with top vertex downwards. The top wall is maintained isothermally cooled and left as well as right inclined walls are made uniformly heated. Two diamond-shaped obstacles are positioned inside the enclosure. The nanofluidic motion is supposed to be magnetically influenced. This investigation includes a fine analysis of how various thermal modes of obstacles affect the velocity and thermal profiles of the nanofluid. Appropriate similarity conversion leads to having a non-dimensional flow profile and is treated with Galerkin finite element scheme. The grid independency, experimental verification, and comparison assessments are directed to explore the model accuracy. The dynamic parameters like Rayleigh number [Formula: see text], nanoparticle volume fraction [Formula: see text], and Hartmann number [Formula: see text] are varied to perceive the noteworthy changes in isotherms, velocity, streamlines, and Nusselt number. The consequences specify average Nusselt number deteriorates for Hartmann number but escalates for nanoparticle concentration and Rayleigh number. Both heated and adiabatic obstacles exhibit high heat transport, while cold obstacles reveal the lowest magnitude in heat transmission. For Rayleigh number, cold obstacles reveal 34.51% heat transport enhancement, whereas it is 52.72% for heated obstacles compared to cold one.

mathematics subject classification: 76W05
Study of wear losses and frictional heat dissipation during dry sliding wear of ilmenite reinforced Al-alloy composite
Authors: Singhal Varun , Prakash Pandey Om
Published: January 2022

In this investigation, ilmenite mineral reinforced Al–Si alloy matrix composite (AMC) has been developed. The wear behavior of the developed composites has been studied for their end application as break drum material to replace cast iron used in automobile industries. Ilmenite is one of the major sea beach mineral. AMC has been prepared through a low-cost stir-casting method in which 1 wt.% graphite (Gr)/tin (Sn) as a solid lubricant has been added during the fabrication of composites itself. The optical micrographs of AMC revealed uniform distribution of ilmenite particles throughout the matrix. The wear rate of the base LM30 alloy containing 17% Si and the developed composites has been studied at different normal loads at a constant velocity of 1.6 m.s−1. Optimized data revealed a significant wear rate reduction due to solid lubrication provided by Gr/Sn (∼32%). The wear rate of composites has been compared with traditional cast iron used in brake drums under similar experimental conditions. Composites exhibit nearly identical wear behavior throughout the test. The microstructural study of wear track and debris revealed that Sn and Gr used as solid lubricants played a vital role in reducing the wear loss of the prepared composites. A theoretical study of frictional heat generated during dry sliding and its dissipation has been done to establish the operative wear mechanism in the composites.