bluuebunny/crossref_metadata_2025 huggingface dataset:
The Release of Indium Ion Derived from Epithelial Cells and Macrophages Solubilization Contribute to Pneumotoxicity Induced by Indium Oxide Nanoparticles
Authors: Wang Mei , Song Wei , Chen Zhaofang , Li Huilin , Yuan Jinhua , Wang Hao , Wang Liya , Cao Jing , You Yue , Chen Linlin , Zhao Feng , Li Yunhui
Published: July 2021

Occupational exposure to indium oxide and indium containing particles has been associated with the development of severe lung diseases called “indium lung.” According to the survey of occupational hygiene, indium oxide nanoparticles have been identified in the workplaces
and the lungs of workers. To date, the potential mechanism of the pneumotoxicity has been poorly understood and no effective therapies are available against “indium lung.” Our present study reported that the exposure of indium oxide nanoparticles damaged lung epithelial cells and
alveolar macrophages and induced pulmonary alveolar proteinosis and inflammation in rats. In the 8-week post-exposure period, the indium oxide nanoparticles still mostly accumulated in the lungs and then persistently release indium ions in two months after exposure. In vitro, the epithelial
cells show the greater potential for release of indium ions from indium oxide nanoparticles compared with the macrophages. EDTA-2Na, a metal chelating agent expected to remove the indium ions, was found to significantly reduced the cytotoxicity of indium oxide nanoparticles. Herein, the pneumotoxicity
may be attributed to the slow and incremental release of indium ions from indium oxide nanoparticles primary dissolved by epithelial cells and macrophages, at least partially. The study may provide some insights to the pathogenicity mechanisms of “indium lung” and some clues against
the health hazards of occupational inhaled indium oxide nanoparticles at the workplaces.
A Simple Dilution Method for Preparation of Different Aggregates from Oleic Acid/CHAPSO Bicelles
Authors: Taguchi Shogo , Tachibana Yasuaki , Kimura Yuta , Yamamoto Takuji , Umakoshi Hiroshi
Published: July 2021

We evaluated the effect of dilution on both the size and packing density of aggregates prepared from a fatty acid (oleic acid, OA)/detergent (3-[(3-cholamidopropyl)dimethylammonio]-2-hydroxypropane sulfonate (CHAPSO)) bicelle as a parent for functional membrane materials. The sizes
of the aggregates formed at different molar ratios, XOA(= [OA]/([OA]+[CHAPSO])), of 0.3 and 0.7 and their parent bicelles were measured by dynamic light scattering and transmission electron microscopy; their packing density was evaluated by deconvolution of the fluorescence
spectrum, where Laurdan molecules were used as a probe. The experimental results showed that the bicelles formed aggregates upon dilution because of the hydration of CHAPSO. The packing density of the nano-ordered aggregate formed at XOA = 0.3 was much greater than that of
the aggregate formed at XOA = 0.7, implying the formation of an ordered aggregate under the condition of XOA = 0.3
Small Hematite Nanoparticles from the Kiruna-Type Ore; Evaluation of Declined Balance Limit of the Attrition Process and Their Catalytic Properties
Authors: Mostaghelchi Majid , Zendehbad Mohammad , Lengauer Christian L.
Published: July 2021

Hematite nanoparticles possess unique properties which have motivated substantial attention for numerous applications, including environmental remediation and wastewater treatment as a promising novel technology. The magnetite-silicate raw material of Kiruna-type ore has been introduced
as an innovative precursor, decreasing the attrition balance limit for large-scale production of the ball-mill-derived hematite nanoparticles below the critical size. In this study, the hypothesis and the postulated role of quartz in the effective size reduction process were further investigated.
The prepared samples were characterized in detail via X-ray fluorescence (XRF) and powder X-ray diffractometry (pXRD) to be compared with the previous results. Furthermore, the catalytic and photocatalytic activities of the obtained nanoparticles were evaluated in the oxidation reaction of
a common persistent sulfo-organic contaminant. The results exposed outstanding reactivity, particularly in their photocatalytic performance, suggesting them as a strong oxidizing agent and active photocatalyst, which greatly promises many possible applications including water and environmental
remediation.
Electronic Parameters of Diode Based Organometallic Semiconductor Dyes Centered Ruthenium Complexes with Active COOH Terminals
Authors: Kemal Havare Ali
Published: July 2021

In this study, the ruthenium complexes, which is an organometallic N-3 and C-106 semiconductor material, was coated on indium tin oxide (ITO) by using the self-assembled technique and thus a diode containing an organometallic interface was produced. The effects of this interface on
the electronic parameters of the diode were investigated. It is aimed to improve the heterogeneity problem of the inorganic/organic interface by chemically bonding these materials from COOH active parts to the ITO surface. In order to understand how the electronic parameters of the diode change
with this modification, the Schottky diode electrical characterization approach has been used. The charge mobility of the diode was calculated using the current density-voltage curve (J–V) characteristic with Space Charge Limited Current (SCLC) technique. When the electrical field
is applied to the diode, it can be said that the ruthenium complexes molecules create an electrical dipole and the tunneling current is transferred to the anode contact ITO through the ruthenium molecule through the charge carrier, thus contributing to the hole injection. The morphology of
these interface modifications was examined by Atomic Force Microscope (AFM) and surface potential energy by KelvinProbe Force Microscope (KPFM). To investigate local conductivity of bare ITO and modified ITO surface, Scanning Spreading Resistance Microscopy (SSRM) that is a conductive AFM
analyzing technique were performed by applying voltage to the conductive tip and to the sample. According to the results of this work the diode containing N-3 material shows the best performance in terms of charge injection to the ITO due to possess the lowest barrier height Φb
as 0.43 eV.
Cyclic Peptide Modified Gold Clusters Induce Lung Tumor Cell Apoptosis via Generating Intracellular Oxidative Stress
Authors: He Zhesheng , Du Zhongying , Zhang Chunyu , Gao Xueyun , Xing Gengmei
Published: July 2021

Metastatic lung cancer is the leading cause of death for cancer patients. Although many chemical drugs were developed for cancer treatment, metastatic cancer mortality did not decrease significantly. In this article, we designed an Au clusters (AuCs) modified by cyclic RGD peptides
which well target the integrin of human lung carcinoma cells (A549). The RGD-AuCs could well induce A549 cells apoptosis, but have no cytotoxicity on the human bronchial epithelial cells (16HBE), which are normal cells support respiratory system. The AuCs could be internalized and localized
in the lysosomes of A549 tumor cells and further release into cytoplasma. We found the ROS level was increased by AuCs, and such high ROS level finally leads to depolarization of mitochondria. Eventually, the AuCs stimulating mitochondria related apoptosis pathway to induce A549 tumor cells
apoptosis. We deduce the gold clusters would be an effective therapeutic candidate to against metastatic lung tumor in the future studies.
Simple Preparation of Carbon Dots and Application in Cephalosporin Detection
Authors: Li Yan , Yang He-Ping , Chen Shu , Wu Xiang-Jiang , Long Yun-Fei
Published: July 2021

Carbon dots have good biocompatibility, low toxicity, excellent photoluminescence properties, and good light stability, endowing them good application prospects in drug detection, chemical analysis, drug delivery, and other fields. In this study, p-phenylenediamine was used as
the carbon source, and carbon dots were synthesized in hydrochloric acid medium using microwave method. When the excitation wavelength is about 300 nm, a strong emission peak of 689 nm is detected for the synthesized carbon dots. Carbon dots’ size is about 4.0±0.2 nm, and the
carbon dots with spherical shape are uniformly distributed. The quantum yield of carbon dots is 8.07%. In addition, cephalosporins. were detected and analyzed using synthetic carbon dots. The results show that the presence of cephalosporins reduced the fluorescence intensity of carbon dots,
and the reduced fluorescence intensity of the synthesized carbon dots showed a linear correlation with the cephalosporins’ concentration. Cephalosporins’ detection scope is 0.2 μmol/L to 80 μ mol/L, and the detection limit is 0.084 μ mol/L. A mechanism
study shows that the effect of cephalosporins on carbon dot’s fluorescence intensity can be attributed to the inner filter effect of cephalosporins. On this basis, a sensitive and 0selective cephalosporins detection method was established. Furthermore, this established method for cephalosporins
detection was applied to real samples, resulting in a low relative standard deviation (RSD) and good recoveries.
Cadmium Sulfide (CdS) Thin Films with Improved Morphology for Humidity Sensing by Chemical Bath Deposition at Lower pH
Authors: Sengupta Sucheta , Kumar Avshish , Jain V. K.
Published: July 2021

Cadmium sulfide (CdS), an II–VI group semiconductor material, is one of the most investigated semiconductors in thin film form. In this work, we synthesized CdS thin films with improved film morphology in the presence of ethylene diamine (EA) as the complexing agent by chemical
bath deposition (CD) at lower pH. Detailed characterization reveals the presence of cubic phase CdS with a band gap of 2.39 eV with the resultant morphology significantly influenced by the composition of the growth solution. The resultant CdS films finds prospective application as a humidity
sensor with a high sensor response of 2.61 corresponding to 80% relative humidity.
Superhydrophobic Copper Materials with Excellent Durability and Regeneration Based on Self-Similarity in Structure and Composition
Authors: Bai Wenxia , Zhou Jinxuan , Shi Xueting , Wang Haitao , Liu Yanhua , Feng Libang
Published: July 2021

The widespread application of artificial superhydrophobic material is hindered by the poor durability and regeneration of artificial superhydrophobicity. The problem is expected to be resolved by endowing the superhydrophobic material with self-similarity. Herein, Copper-based superhydrophobic
material intensified by furfuryl alcohol resin (Cu/FAR) with long-term durability and high strength is developed, and the obtained Cu/FAR composite reveals excellent and durable superhydrophobicity. Moreover, it is a remarkable fact that the as-prepared superhydrophobic Cu/FAR exhibits outstanding
durability and maintenance of superhydrophobicity grounded on the good self-similarity in micro-structure, chemical structure and composition both externally and internally. Consequently, the superhydrophobicity can be maintained or regenerated without difficulty even if superhydrophobic surface
has been damaged or fouled accidentally. Therefore, the method provides a new thought to prepare superhydrophobic material with robust durability and outstanding maintenance.
Green and Simple Synthesis of Photoluminescence-Tunable Carbon Dots for Sensing and Cell Imaging Applications
Authors: Sun Dong , Li Shu-Jun , Wang Chun-Feng , Liu Tian-Tian , Bai Guang-Yue , Zhuo Ke-Lei
Published: July 2021

Innovative nitrogen and boron co-doped carbon dots are hydrothermally produced using fructose, urea, and boric acid as precursors. The synthesized carbon dots possess a uniform morphology, and exhibit excellent fluorescence stability, tunable luminescence property, strong resistance
to photobleaching, low-toxicity, and excellent biocompatibility. It is also found more dopant urea is conducive to the formation of the carbon dots with more B–N bonds, and shorter wavelength of fluorescence emission. Meanwhile, the synthesized carbon dots are well utilized as a photoluminescent
probe for facile Hg2+ determination and fluorescent imaging reagent in cells.
Ru/TiO2 Nanostructured Catalysts: Synthesis, Characterization and Catalytic Activity Towards Hydrogenation of Ethyl Levulinate
Authors: Kumaravel Sakthivel , Thiripuranthagan Sivakumar , Erusappan Elangovan , Sivakumar Aishwarya , Kumaravel Saranraj , Natesan Balasubramanian , Rajendran Karthi
Published: July 2021

Pristine TiO2 and x% Ru/TiO2 catalysts with different wt.% of Ru (x%= 1.5%, 2%, 2.5% and 3%) were synthesized using sol–gel and simple impregnation methods. Different characterization techniques such as X-ray diffraction (XRD), Fourier transform
infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), High-resolution transmission electron microscope (HR-TEM), Inductively coupled plasma-optical emission spectrometry (ICP-OES) and Thermogravimetry/Differential thermal analysis (TG/DTA) were used to study the physicochemical
and morphological properties. The XRD patterns of the as-prepared pristine TiO2 catalyst showed high crystalline nature. The HR-TEM images revealed that the Ru nanoparticles (NPs) were evenly dispersed on the TiO2 surface. The prepared catalysts were evaluated for their
catalytic activity towards the liquid phase hydrogenation of ethyl levulinate under mild reaction conditions (ambient H2 pressure). Among the various catalysts, 2.5% Ru/TiO2 catalyst showed the maximum catalytic activity of 79% ethyl levulinate (EL) conversion with 82% selectivity
of γ-valerolactone (GVL). The recyclability test revealed that the most active 2.5% Ru/TiO2 also showed the highest stability of the catalyst under optimized experimental conditions.
Recent Advances in Electrochemical Determination of Pesticides
Authors: Momčilović Milan Z. , Milićević Jelena S. , Ranđelović Marjan S.
Published: July 2021

Widespread usage of pesticides in agricultural practice caused their residues to appear in water and food products intended for human consumption. The potential toxicity of these resources has raised awareness about pesticide tracking in the environment. Development of reliable electrochemical
sensors for the on-site determination of pesticide concentrations is envisioned as an alternative to conventional chromatographic methods which are robust, expensive and require skilled work force. Modification of the working electrode surface can result in enhanced electrochemical response
towards selected pesticide making such electrode convenient sensor for facile and efficient determination of pesticides in low concentrations. New generation of nanomaterials is applied in electrode modification in order to improve its sensitivity and selectivity. The present review summarizes
significant advances in voltammetric detection of pesticides for the period of the past five years. The major focus of this review is set to the types of carbon and oxide based materials, metal nanoparticles, composites and other materials employed to upgrade standard electrode configurations
such as glassy carbon and carbon paste electrodes, boron doped diamond electrodes, screen printed and film electrodes, metal and amalgam, and other kinds of electrodes.
Multidisciplinary Management of Severe Traumatic Hepatic Injury Involving Interventional Radiology Embolization, Trauma Laparotomy, and Liver Transplantation
Authors: Shah Jigesh , Mufti Arjmand , Dumas Ryan , Porembka Matthew , Minei Joseph , Hanish Steven I. , Vagefi Parsia A.
Published: July 2021

This report describes liver transplantation as a successful strategy in the management of a young man who presented to a local emergency room following catastrophic traumatic hepatic vascular injuries. Expeditious multidisciplinary management, including interventional radiology, trauma surgery, and ultimately transplant surgery, provided the patient with definitive therapy following his injuries and early return to normal activity. Our experience highlights the importance of prompt referral of select hepatic trauma patients for liver transplant evaluation as part of their complex trauma management.
Gluteal Necrotizing Soft Tissue Infection and Hip Osteomyelitis due to Candida Glabrata
Authors: Henry Reynold , McGillen Patrick , Nassiri Nima , Asanad Kian , Matsushima Kazuhide , Inaba Kenji , Clark Damon
Published: July 2021

Background

Necrotizing soft tissue infection (NSTI) is a rapidly progressive and often fatal infection of the soft tissue. Classically, it is attributed to bacterial infection and immunocompromised patients are particularly vulnerable. However, NSTI due to fungal infection rarely does occur, including from Candida species, and can pose a diagnostic challenge for unfamiliar providers. Expedient clinical recognition, surgical debridement, fungal tissue culture, and initiation of antifungal therapy are key.

Case Presentation

We report a 39-year-old obese male with long-standing history of poorly controlled diabetes who presented to a community hospital, noted to have NSTI of the sacrum, bilateral buttocks, and left hip, and was treated only with antibiotics. After transfer to an academic center, the patient underwent aggressive debridement and tissue diagnosis of Candida glabrata NSTI was made. He received broad-spectrum antibiotic and antifungal therapy for several months. Over the course of 4 months, his infection was cleared, and his large tissue defects were reconstructed with rotation flaps and the patient was discharged home.

Conclusions

Fungal NSTI is a rare entity, especially when due to Candida species. It can be exceedingly difficult to diagnose and manage, as these patients may suffer higher mortality than those with NSTI due to bacteria. A high index of suspicion for the entity, rapid debridement, intraoperative tissue culture, and treatment with appropriate antifungal therapy offers the greatest chance of survival.
The Association Between Cardio-Ankle Vascular Index and Primary Idiopathic Complete Atrioventricular Block in an Elderly Population
Authors: Turan Turhan , Kara Faruk , Kul Selim , Sayın Muhammet Rasit , Sahin Sinan , Varol Mustafa Oğuz , Akyuz Ali Riza , Bayraktar Ali , Çırakoğlu Ömer Faruk , Korkmaz Levent
Published: July 2021

The most common cause of complete atrioventricular block (CAVB) is age-related fibrotic degeneration and is referred to as primary idiopathic complete atrioventricular block (iCAVB). This study aims to investigate the relationship between iCAVB and arterial stiffness using the cardio-ankle vascular index (CAVI).

In this study, of 205 CAVB patients, 41 patients with iCAVB implanted with a dual-chamber permanent pacemaker and 40 age- and gender-matched controls were studied. Arterial stiffness was assessed by a VaSera VS-1000 CAVI instrument. The CAVI values of patients with iCAVB were significantly higher compared with the controls (9.63 ± 1.42 vs 8.57 ± 1.12, P < .001). Idiopathic complete atrioventricular block frequency was higher among patients with abnormal CAVI values than those with borderline and normal CAVI ( P = .04). In multivariate analysis, only CAVI was an independent predictor of iCAVB after adjusting for other relevant factors (odds ratio, 2.575; 95% CI [1.390-4.770]; P = .003). The present study demonstrated that CAVI, as a marker of arterial stiffness, was increased among elderly patients with iCAVB. Thus, we provide a possible additional mechanism linking easily measured CAVI with iCAVB.
A Bioecological Systems View of School Experiences of High-Ability Students From Rural India
Authors: Chowkase Aakash A.
Published: July 2021

Using Bronfenbrenner’s bioecological systems theory, this study investigated the school experiences of nine high-ability students from three secondary schools in rural Western India. Analyses of semistructured interviews revealed several interconnected systems of influences on the school experiences of participants. Intrapersonal aspects such as positive academic self-perceptions, constant pursuit for academic excellence, and mixed feelings about being formally identified as gifted directly affected school experiences. In the participants’ immediate environment, school aspects such as teacher–student relationships, teaching methods, and curricular content had the most prominent influence on their school experiences. Interactions between family and the school systems had direct and mixed influences on participants’ school experiences. Besides the adversities of rural education, participants emphasized the unique strengths of rural settings in India including the role of extended families, strong rural attachment, and positive relationships with school, teachers, and community that positively contributed to their school experiences. Implications for rural gifted education in India are discussed.
Safety of Propofol When Used for Rapid Sequence Intubation in Septic Patients: A Multicenter Cohort Study
Authors: Marler Jacob , Howland Rachel , Kimmons Lauren A. , Mohrien Kerry , Vandigo Joseph E. , Jones G. Morgan
Published: July 2021

Purpose:

Septic patients are at risk for hypotension, and this risk may increase during rapid sequence intubation (RSI). Sedatives such as propofol must be used carefully due to its ability to reduce vascular sympathetic tone. Since the safety of propofol for RSI is not well described in sepsis, this was a study evaluating propofol and its effects on hemodynamics when used for RSI in a septic population.

Materials and methods:

We conducted a multicenter, retrospective, cohort study of patients with sepsis or severe sepsis requiring sedation for RSI. Patients receiving a propofol bolus for RSI were compared to patients undergoing RSI without a propofol bolus. The safety profile of propofol was evaluated according to the rates of post-intubation hypotension and vasopressor utilization between groups.

Results:

A total of 179 patients (79 propofol, 100 non-propofol) were evaluated. There were no differences in hypotension (81% vs 78%; P = .62) or vasopressor utilization between the propofol and non-propofol groups (43% vs 49%; P = .43). Patients in the non-propofol group had increased APACHE II scores and healthcare-associated infections.

Conclusions:

In this cohort study, administration of propofol for RSI in patients with sepsis and severe sepsis did not increase incidence of hypotension or vasopressor use, but acute illness may have introduced provider selection bias causing less propofol use in the non-propofol group. Larger prospective studies are needed to better characterize the adverse hemodynamic effects of propofol, before propofol bolus doses for RSI can be considered for safe use in this population.
Analysis of intralaminar cracking in 90-plies of GF/EP laminates with distributed ply strength
Authors: Pakkam Gabriel Vivek Richards , Loukil Mohamed Sahbi , Varna Janis
Published: July 2021

Intralaminar cracking in relatively thick 90-plies of [[Formula: see text]]s laminates is analyzed using experimental data for two Glass fiber/Epoxy (GF/EP) material systems. Weibull parameters for transverse failure stress of the 90-ply are obtained from experimental intralaminar crack density versus applied strain data, showing that a reliable analysis requires sufficient amount of data in so called noninteractive crack density region. Monte Carlo simulations of cracking were performed using stress distribution between two cracks calculated using two models: Hashin’s model and a novel model that ensures that the average stress is exactly the same as in FEM solution. Due to its features, the Hashin’s model predicts too low intralaminar crack density (it predicts too strong interaction between cracks). The results emphasize the importance of having a proper stress distribution model when performing Monte Carlo simulations. Simulations were used not only to simulate intralaminar cracking in high and very low crack density regions but also for improving the procedure of Weibull parameter determination.
Mistaking theft: Dishonesty ‘turns over a new leaf’
Authors: Wang Bo
Published: July 2021

The common law doctrine of mistake of fact or civil law works as denial of offending, but dishonesty works as one of the definitional elements of crimes such as theft and fraud. It is argued in this article that the rulings in R v Barton [2020] 3 WLR 1333 and Ivey v Genting Casinos (UK) (trading as Crockfords Club) [2018] AC 391 do not change the doctrine of mistake of fact or civil law but do change the law in respect of mistakes about what is honest. A defendant whose conduct is taken as dishonest according to community standards may well avoid criminal liability if he was genuinely mistaken about a fact or civil law right. It is submitted that since the doctrine of mistake of fact or civil law is already provided for, the law is not expanded greatly by the rulings in Ivey and Barton which merely bring back the objective test of dishonesty that had long been established before the Ghosh test. The decision in Barton is substantively welcome, even though the change in the law arose from a civil law case where dishonesty was not an issue before the court.
Is Distance Really Dead in the Online World? The Moderating Role of Geographical Distance on the Effectiveness of Electronic Word of Mouth
Authors: Todri Vilma , Adamopoulos Panagiotis (Panos) , Andrews Michelle
Published: July 2021

The authors investigate how the geographical distance between online users is associated with electronic word-of-mouth (eWOM) effectiveness. Their research leverages variation in the visibility of eWOM messages on the social media platform of Twitter to address the issue of correlated user behaviors and preferences. The study shows that the likelihood that followers who are exposed to users’ WOM subsequently make purchases increases with followers’ geographic proximity to the users. The authors propose social identification as a potential mechanism for why geographical distance still matters online in eWOM: because consumers may form a sense of social identity based on their physical location, information regarding the spatial proximity of users could trigger online social identification with others. The findings are robust to alternative methods and specifications, such as further controlling for latent user homophily by incorporating user characteristics and embeddings based on advanced machine-learning and deep-learning models and a corpus of 140 million messages. The authors also rule out several alternative explanations. The findings have important implications for platform design, content curation, and seeding and targeting strategies.
Empowering Education with Crowdfunding: The Role of Crowdfunded Resources and Crowd Screening
Authors: Zhou Chen , Gill Manpreet , Liu Qiang
Published: July 2021

Crowdfunding has emerged as a market-based solution to give frontline complex public service employees the opportunity to acquire resources by advertising project proposals for donor patrons on crowdfunding platforms. However, whether crowdfunded resources can improve offline service outcomes, and if so, how and when, remains murky. Focusing on the context of public education crowdfunding and applying theories from crowdfunding and services marketing literature, the authors conceptualize that the combination of two factors—namely, teachers’ request for resources meant to satisfy unmet heterogeneous (i.e., diverse and evolving) intellectual needs of students and donors’ screening and approval (i.e., crowd screening) of promising projects—helps improve student academic achievement. Collating novel panel data from DonorsChoose and California Department of Education, the authors show that (1) crowdfunded resources positively affect student academic achievement, (2) student academic achievement improves with the increase in the heterogeneity of intellectual needs that crowdfunded resources likely satisfy, (3) crowd screening of project proposals plays a critical role in the offline effectiveness of crowdfunded resources, and (4) crowd screening effectiveness depends on the type of project.
Grammarly’s Tone Detector: Helping Students Write Pragmatically Appropriate Texts
Authors: Winans Michael D.
Published: July 2021

Grammarly’s Tone Detector is included in the free version of the application and is available for major phone and computer program platforms. Its strength is in helping students compose pragmatically appropriate texts which could substantially increase their confidence and the feeling of autonomy. It accomplishes this by providing writers with tone indications of their text paired with emojis to help navigate the sometimes opaque waters of pragmatics. However, this tool does not provide indications of which words or phrases contribute to an indicated tone, nor does it offer suggestions for improvement. It is a perpetual beta tool in that it asks for user input to continually adapt and learn to the changing communicative situation. Although there are some areas for improvement, it is a useful tool that teachers could recommend to their students to support their ability to raise their confidence about the pragmatic appropriateness when writing emails and other texts where pragmatics are important.
Improving Special Education Service Delivery Through Interdisciplinary Collaboration
Authors: Dillon Suzanna , Armstrong Erika , Goudy Leah , Reynolds Hannah , Scurry Sara
Published: July 2021

Central to positive learning outcomes for students with disabilities is the ability of the individualized education program (IEP) team to work collaboratively. Within the IEP team, effective service delivery involves direct and related service providers working in an interdisciplinary capacity as they share professional responsibilities to implement the student’s program and achieve the common goal of improved student outcomes. With support from the literature, this paper discusses the core components of Bronstein’s Interdisciplinary Collaboration Model (2003); and elucidates how professionals share their content knowledge and technical skills with each other, collaborate in instructional design, and gain a firm understanding of each other’s discipline in practice. Practical applications that promote interdisciplinary collaboration between adapted physical educators, special educators, related service providers, and parents to improve service delivery and learner outcomes are shared.
Prehospital Scheduling Management by the Critical Path Method for Burn Mass Casualty Incidents
Authors: Wang Chih-Peng , Shih Ban-Jwu , Liaw Shiumn-Jen
Published: July 2021

In 2015, a dust explosion occurred in New Taipei Water Park in Taiwan, and 499 casualties was appallingly high. In fact, the government spent 208 min of response time from receiving calls for emergency to sending the last wounded person to hospital. To stop a similar accident happening again, a well-prepared strategy, with an aim to reduce the rescue time, to respond to such an emergency is necessary. This study mainly focuses on the execution of mass casualty operations while both efficiency and quality of care are considered. We not only find that there is only 1 h or less to allocate rescue resources after a Burn Mass Casualty Incident (BMCI) happens but also shorten the response time. It is our first time to use a special method, called Critical Path Method (CPM), to analyze the rescue process. But before CPM is created, the benefit of available resources should be maximized, and timely, safe, and effective emergency medical services should be provided. With CPM, the interrelations of every activity can be visualized, and the most time-consuming activity can be found by this efficient time management. If the relationship between the predecessors and its successors operations of the most time-consuming activity item is reshaped, BMCI prehospital scheduling management becomes more effective based on its efficiency and quality of care.
How Many Total Points Should Your Course Have?
Authors: Troisi Jordan D. , Arnott-Hill Elizabeth , Benson Or’Shaundra , Wright Julian W. C. , Fleck Bethany
Published: July 2021

Background

Instructors often use a point-based system for grading students (e.g., 100 or 1000 total points). This system can impact student outcomes.

Objective

The purpose of this research was to examine the implications of different point value courses for student emotions, perceptions of courses, and classroom performance.

Method

The lab-based study used an experimental design to gather student responses to a hypothetical course with one of three potential total point values (100, 1,000, or 100,000 points). The classroom-based study examined student responses to different point values in 12 actual courses in which students were enrolled (with either 100 or 1000 total points).

Results

In the lab-based study, courses with greater total point values (i.e., 1000 and 100,000) had greater emotional impact than a course with 100 total points. Participants in these conditions also preferred a course that featured a pass/fail scheme. In the classroom-based study, students in the 100-point condition (vs. 1000-point condition) missed more assignments, and as a consequence, performed more poorly in their course.

Conclusion

Higher total point values in courses may have a more significant impact on students’ emotions, and as a consequence, they may miss less work, and perform better in the course overall.
Pleomorphic Adenoma of the Submandibular Gland in a 10-Year-Old Child: A Case Report
Authors: Rachida Bouatay , Kharrat Ons , Boughzala Wiem , Hammouda Seifeddine Ben , Abdeljelil Nouha Ben , Kolsi Naourez , koubaa Jamel
Published: July 2021

We report the case of a 10-year-old girl with a painless slowly growing mass that had developed over the course of 2 years in the left submandibular area. Physical examination revealed a firm painless submandibular mass with no other associated signs. Ultrasound graphics were in favor of a sebaceous cyst. Fine-needle aspiration and magnetic resonance images (MRI) concluded to a pleomorphic adenoma of the submandibular gland. The patient underwent left submandibulectomy. Histopathological examination confirmed the diagnosis of pleomorphic adenoma arising from the submandibular gland. The postoperative course was uneventful. Pleomorphic adenoma of the submandibular gland represents a diagnostic and therapeutic dilemma in children. Preoperative evaluation, including MRI and fine-needle aspiration, is recommended. Total submandibulectomy is also recommended to minimize recurrences and to avoid malignant transformation.
Carboxyhemoglobin levels in children during extracorporeal membrane oxygenation support: a retrospective study
Authors: Kimura Satoshi , Gelbart Ben , Chiletti Roberto , Stephens David , Butt Warwick
Published: July 2021

Introduction:

Hemolysis is a common complication of extracorporeal membrane oxygenation (ECMO). There are few data on whether carboxyhemoglobin (COHb), a potential marker of hemolysis, are elevated during ECMO support.

Methods:

We conducted a single-center, retrospective study comparing peak COHb levels of children pre-, during, and post-ECMO from January 2017 to August 2020.

Results:

There were 154 ECMO runs in 147 children (154 PICU admissions) included in the study. The median age was 3.5 (IQR 0.2, 39.2) months. Veno-arterial ECMO was the predominant mode: 146/154 (94.8%). Eighty-seven children (56.5%) underwent cardiac surgery. Peak COHb levels during ECMO were statistically significantly higher compared to pre ECMO (COHb 1.8% (IQR 1.4, 2.6) vs COHb 1.2% (IQR 0.7, 1.7), p < 0.001) and post ECMO (COHb 1.6% (IQR 1.3, 2.2), p = 0.009). Children with COHb ⩾2% were younger and had longer duration of ECMO support. Plasma hemoglobin weakly correlated with COHb level ( r = 0.14; p = 0.04).

Conclusions:

Carboxyhemoglobin levels increased during ECMO support compared to the pre and post ECMO period. Younger age and longer ECMO duration were associated with COHb levels ⩾2%. Plasma hemoglobin weakly correlated with COHb level.
Association of Geometric Characteristics of Knee Anatomy (Alpha Angle and Intercondylar Notch Type) With Noncontact ACL Injury
Authors: Barnum Michael S. , Boyd Evan D. , Vacek Pamela , Slauterbeck James R. , Beynnon Bruce D.
Published: July 2021

Background:

The femoral intercondylar notch type and the alpha angle (the angle between the femoral notch roof and the long axis of the femur) are easily measured in clinical settings; however, their associations with anterior cruciate ligament (ACL) injury remain unclear.

Hypothesis/Purpose:

The purpose was to determine if the alpha angle and the femoral notch type are associated with noncontact ACL injury univariately and in combination with previously identified knee geometric risk factors. We hypothesized that the alpha angle and the femoral notch type are associated with noncontact ACL injury and that the association differs between men and women.

Study Design:

Case control study; Level of evidence, 3.

Methods:

The alpha angle and the femoral notch type were measured via 3T magnetic resonance imaging (MRI) acquired from 61 women and 25 men with a first-time noncontact ACL injury. Each injured patient was matched with a control participant based on age, sex, and participation on the same sports team. A conditional logistic regression was used to assess univariate associations with ACL injury as well as multivariate associations using MRI-based risk factors of knee geometry identified in previous analyses: femoral intercondylar notch width at the anterior outlet, femoral intercondylar notch anteromedial ridge thickness, volume of the ACL, tibial plateau lateral compartment subchondral bone slope, lateral compartment middle articular cartilage slope, lateral compartment meniscus-cartilage height, lateral compartment meniscus-bone angle, and medial tibial spine volume.

Results:

For female athletes, the alpha angle (odds ratio, [OR], 1.82 per 1-degree increase; P = .001), the tibial lateral compartment articular cartilage slope (OR, 1.25 per 1-degree increase in the posterior-inferior directed slope; P = .022), and the femoral notch anteromedial ridge thickness (OR, 3.36 per 1-mm increase; P = .027) were independently associated with ACL disruption. For men, no other variables entered the models after the alpha angle was inputted as the first step (OR, 2.19 per 1-degree increase; P = .010).

Conclusion:

For women, ACL injury was most strongly associated with increased alpha angle, increased tibial plateau slope, and increased femoral notch ridge thickness. For men, increased alpha angle was the most significant factor associated with ACL injury. The mechanism of injury might be associated with a combination of impingement of the ACL against the bone and increased ligament loading.
Chondral Damage After Arthroscopic Repair Techniques for Acute Bony Bankart Lesions: A Biomechanical Study
Authors: Greenstein Alexander S. , Chen Raymond E. , Brown Alexander M. , Knapp Emma , Roberts Aaron , Awad Hani A. , Voloshin Ilya
Published: July 2021

Background:

Bony Bankart lesions can be encountered during treatment of shoulder instability. Current arthroscopic bony Bankart repair techniques involve intra-articular suture placement, but the effect of these repair techniques on the integrity of the humeral head articular surface warrants further investigation.

Purpose:

To quantify the degree of humeral head articular cartilage damage secondary to current arthroscopic bony Bankart repair techniques in a cadaveric model.

Study Design:

Controlled laboratory study.

Methods:

Testing was performed in 13 matched pairs of cadaveric glenoids with simulated bony Bankart fractures, with a defect width of 25% of the glenoid diameter. Half of the fractures were repaired with a double-row technique, while the contralateral glenoids were repaired with a single-row technique. Samples were subjected to 20,000 cycles of internal-external rotation across a 90° arc at 2 Hz after a compressive load of 750 N, or 90% body weight (whichever was less) was applied to simulate wear. Cartilage defects on the humeral head were quantified through a custom MATLAB script. Mean cartilage cutout differences were analyzed by the Wilcoxon rank-sum test.

Results:

Both single- and double-row repairs showed macroscopic damage. The histomorphometric analysis demonstrated that the double-row technique resulted in a significantly ( P = .036) more chondral damage (mean, 57,489.1 µm2; SD, 61,262.2 µm2) than the single-row repair (mean, 28,763.5 µm2; SD, 24,4990.2 µm2).

Conclusion:

Both single-row and double-row arthroscopic bony Bankart fixation techniques resulted in damage to the humeral head articular cartilage in the concavity-compression model utilized in this study. The double-row fixation technique resulted in a significantly increased cutout to the humeral head cartilage after simulated wear in this cadaveric model.

Clinical Relevance:

This study provides data demonstrating that placement of intra-articular suture during arthroscopic bony Bankart repair techniques may harm the humeral head cartilage. While the double-row repair of bony Bankart lesions is more stable, it results in increased cartilage damage. These findings suggest that alternative, cartilage-sparing arthroscopic techniques for bony Bankart repair should be investigated.
Bilateral Squatting Mechanics Are Associated With Landing Mechanics in Anterior Cruciate Ligament Reconstruction Patients
Authors: Peebles Alexander T. , Williams Blaise , Queen Robin M.
Published: July 2021

Background:

Proper lower extremity biomechanics during bilateral landing is important for reducing injury risk in athletes returning to sports after anterior cruciate ligament reconstruction (ACLR). Although landing is a quick ballistic movement that is difficult to modify, squatting is a slower cyclic movement that is ideal for motor learning.

Hypothesis:

There is a relationship between lower extremity biomechanics during bilateral landing and bilateral squatting in patients with an ACLR.

Study Design:

Descriptive laboratory study.

Methods:

A total of 41 patients after a unilateral ACLR (24 men, 17 women; 5.9 ± 1.4 months after ACLR) completed 15 unweighted bilateral squats and 10 bilateral stop-jumps. Three-dimensional lower extremity kinematics and kinetics were collected, and peak knee abduction angle, knee abduction/adduction range of motion, peak vertical ground-reaction force limb symmetry index (LSI), vertical ground-reaction force impulse LSI, and peak knee extension moment LSI were computed during the descending phase of the squatting and landing tasks. Wilcoxon signed-rank tests were used to compare each outcome between limbs, and Spearman correlations were used to compare outcomes between the squatting and landing tasks.

Results:

The peak vertical ground reaction force, the vertical ground reaction force impulse, and the peak knee extension moment were reduced in the surgical (Sx) limb relative to the nonsurgical (NSx) limb during both the squatting and landing tasks ( P < .001). The relationship between squatting and landing tasks was strong for the peak knee abduction angle ( R = 0.697-0.737; P < .001); moderate for the frontal plane knee range of motion (NSx: R = 0.366, P = .019; Sx: R = 0.418, P = 0.007), the peak knee extension moment LSI ( R = 0.573; P < .001), the vertical ground reaction force impulse LSI ( R = 0.382; P < .014); and weak for the peak vertical ground reaction force LSI ( R = 0.323; P = .039).

Conclusion:

Patients who have undergone an ACLR continue to offload their surgical limb during both squatting and landing. Additionally, there is a relationship between movement deficits during squatting and movement deficits during landing in patients with an ACLR preparing to return to sports.

Clinical Relevance:

As movement deficits during squatting and landing were related before return to sports, this study suggests that interventional approaches to improve squatting biomechanics may translate to improved landing biomechanics in patients with an ACLR.
Household food waste in rural China: A noteworthy reality and a systematic analysis
Authors: Luo Yi , Wu Laping , Huang Dong , Zhu Junfeng
Published: July 2021

Economic development has improved people’s daily diets in China, but food waste has increased significantly. China faces severe natural resource constraints, and reducing food waste is important for ensuring national food security. Based on 1634 survey samples from 28 provinces in China, this study assessed food waste in rural China and empirically analyzed the main factors affecting rural household food waste. The results showed that, on average, 1.67% of food is wasted per household each day in rural China. Food waste is greater in economically developed areas, such as East China. Empirical analysis showed that cooking utensils, preparing the right amount of food, religious beliefs, number of family members, average weight of family members, percentage of purchased grain in the total food consumption in 1 year, and total grain output are significantly related to rural household food waste.
Relational Segregation: A Structural View of Categorical Relations
Authors: Fiel Jeremy E.
Published: July 2021

This article builds a framework for a relational approach to segregation that emphasizes structures of interactions, transactions, and ties between and within social categories. Rather than explaining segregation with dominants imposing formal rules or homophilic people sorting themselves, I highlight segregation’s emergence amid dueling control efforts among actors with malleable categorical identities. And rather than assuming segregation necessarily fuels cycles of inequality or persecution, I identify nuanced advantages and disadvantages for different actors in social conflict. I also explore an underappreciated role of institutions in segregation: They guide relations across different domains of activity that may have different degrees of segregation. An overarching theme is that segregation is not a specific thing with regular causes and effects but an inherently contradictory structural feature of relations that evolves as actors struggle for control.
I am not worthy: How interpersonal experiences influence perceived value and worth of full- and part-time faculty
Authors: Batiste Heidi , Benson Wendi L , Garcia Cynthia
Published: July 2021

Positive interpersonal relationships between college administration and faculty are necessary as they contribute to organizational climate measures, such as a sense of belonging and perceived organizational worth. Furthermore, such relationships may combat against faculty cynicism. Interpersonal experiences are particularly relevant in a post-coronavirus disease 2019 workplace in which interactions with colleagues are infrequent. Little is known about the effects of interpersonal experiences on part-time faculty specifically, as compared with full-time faculty. This study investigates teamwork experiences and interpersonal constraints as predictors of the attitudes and perceptions of full- and part-time faculty at a four-year public teaching college in the southwestern United States. After controlling for years working at the college, teamwork was a consistent predictor of higher sense of belonging, perceived organizational worth, and lower cynicism among full- and part-time faculty. Furthermore, the presence of negative coworker relationships was a significant predictor of lower sense of belonging and perceived organizational worth among full-time faculty. Inadequate help or lack of contact with co-workers was not a significant predictor of faculty attitudes and perceptions. The results of this study suggest the need for fostering teamwork and positive relationships among full- and part-time faculty in a meaningful and systemic manner within institutions of higher education. Additionally, this study provides support for institutionalizing a team-based approach to working among all faculty to foster perceived belonging and worth, while limiting cynicism.