bluuebunny/crossref_metadata_2025 huggingface dataset:
In-Situ Catalytic Gasification of Rice Hull Using Municipal Solid Waste Incineration Bottom Ash
Authors: Jeong Sangjae , Lee Taeho , Lim Se Jeong , Park Young-Kwon , Kim Seungdo , Kim Young-Min
Published: March 2021

The demand for alternative energy is increasing rapidly because of global warming and the depletion of fossil fuels. Gasification is a technology that produces gaseous fuels through the incomplete combustion of waste or biomass. The introduction of a catalyst during gasification may
increase the production of H2 and reduce tar formation. In this study, the catalytic gasification of rice hulls was carried out using a fluidized gasifier. To improve the gas yield and reduce tar, municipal solid waste incineration bottom ash (IBA) having nanoporosity was introduced
as a substitute for the fluidized bed material. Gasification was carried out at 800 °C, and the flow materials were silica sand, dolomite, and incineration bottom ash. The equivalence ratio, which is the ratio of oxygen supplied to oxygen required for complete combustion, was set to 0.3.
The application of alternate fluidized bed materials (dolomite and incineration bottom ash) was effective in improving the hydrogen yield and tar reduction. This was attributed to the high Ca and Mg contents in dolomite and incineration bottom ash. Therefore, it is expected that IBA can be
utilized as a catalytic fluidized bed material to replace silica sand.
Mechanical and Structural Behavior of HfN Thin Films Deposited by Direct Current and Mid-Frequency Magnetron Sputtering
Authors: Chun Sung-Yong
Published: March 2021

Nanocrystalline HfN thin films were deposited onto silicon substrates with direct current magnetron sputtering (dcMS) and mid-frequency magnetron sputtering (mfMS) by using hafnium metallic target with 3-inch diameter and 99.9% purity in argon/nitrogen atmosphere, under 4 different
pulse frequencies and duty cycles. In order to evaluate the structural, morphological and mechanical properties, we used X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), nanoindentation tests. X-ray diffraction patterns show that
films sputtered in dcMS mode have a mixed δ-HfN and HfN0.4 phases, whereas mfMS favor a single δ-HfN phase. mfMS leads to films with the higher mechanical hardness and smaller surface roughness than those of films deposited by dcMS. Hafnium nitride films
with a single δ-HfN phase show the highest hardness values of 24.5 GPa while those of mixed δ-HfN and HfN0.4 phases show the lowest 18.3 GPa. In summary, the sputtering technique has a crucial role on the properties of the film and can be suitable used
to adjust the structure and hardness of HfN films.
The Water Quality Management for Recirculating Aquaculture System by Applying Nano Adsorption Technology
Authors: Hwang Min-Jin , Cha Jeongmin , Kim Eun-Sik
Published: March 2021

In a fish farm, the water quality is important to ensure fish growth and farm productivity. However, the study of the quality of water using in aquaculture has been ignored until now. Although there are several methods to treat water, nanomaterials have not yet been applied for indoor
fish farming because it may difficult to supply a sufficient amount of water, and the operating parameters have not been developed for recirculating aquaculture systems. Nanotechnology can be applied to treat water, specifically through adsorption and filtration, to produce drinking water
from surface water and to treat wastewater by processing a high volume of effluent. The adsorption and filtration of seawater has also progressed to allow for desalination of seawater, and this is recognized as a necessary tool for extended treatment protocols of various types of seawater.
This study investigated the treatment of aquaculture water using nano-porous adsorbents (e.g., pumice stone) to control the contaminants in seawater in order to maintain the water quality required for aquaculture. The results are used to derive an analytical relationship between the ionic
species in aquaculture water, and this provides empirical parameters for a batch reactor for aquaculture. The quality of the influent and effluent for aquaculture is compared using time-series analyses to evaluate the reduction rate of ionic components and thus suggest the optimum condition
for fish farming using bioreactor processes.
Resistances of Carbon Black and Polymers in Smart Paints for Temperature Sensors
Authors: Ahn Ju-Hun , Choi Dae-San , Lee Chang-Yull
Published: March 2021

Temperature sensing and control is an important factor to prevent the overheating of mechanical and electrical components in various devices. However, commercialized temperature sensors can be disadvantageous due to their limited shapes. Therefore, we propose a smart paint to solve
this issue. In this study, smart paints were produced based on carbon black, and their properties were measured using thermistors. Experiments were conducted to analyze the resistance properties using carbon and four types of polymers. Through the scanning electron microscopy (SEM) images
of the mixed paints, it was shown that the resistances were decreased due to the necking phenomena. Furthermore, each paint provides a different temperature coefficient depending on the polymer type.
Biomimetic Crack Sensors Using Electrohydrodynamic Technology
Authors: Kim Keon-Young , Jeong Se-Min , Lee Chang-Yull
Published: March 2021

This paper proposes a new mechanism for detecting microscopic damage of structures based on imitating the sensory organs of spiders. Therefore, it is essential to manufacture sensors that can react sensitively to the micro deformations of structures. Numerous cracks were intentionally
generated to improve the sensitivity of the proposed sensor, and an increase in the gap of the crack was observed by scanning electron microscopy (SEM) observation. Electrohydrodynamic technology is used to detect deformations in a structure of depositing Ag nano paste on a polyethylene terephtha-late
(PET) substrate. Ag nano lines are also observed by SEM images. The sensor is constructed as a grid structure, by forming layers patterned horizontally and vertically. An impact tester is used to verify the mechanism for structural health monitoring using the developed sensor. The resistance
changes of the sensors are applied to estimate the structure’s damaged location. The intersections of the lines with varying resistance can be used to accurately detect crack initiation. The proposed mechanism is a powerful methodology for estimating and detecting microscopic deformations
and damage to structures.
Realization of Broad-Spectrum Using Chirped Multi-Quantum Well Structures in AlGaInP-Based Light-Emitting Diodes
Authors: Oh Hwa Sub , Park Jong-Min , Jeong Seong Hoon , Park Jun-Beom , Jeong Tak , Lee Hyung Joo , So Jin Soo , Jeon Kyung Nam
Published: March 2021

We studied broad-spectrum light emitting diodes appropriate for special lighting applications in terms of their optical behaviors and device performances according to the chirped multi-quantum well structures. As the well thickness from 1 st to 3rd well was changed from 6 nm to 15 nm
and repeated three times, the electroluminescent spectrum was broadened by 65% and the light output power was increased by 8% in comparison to light emitting diodes having conventional multi-quantum well structures. In the case of the chirped multi-quantum well structures having sequentially
decreasing the well thickness from 15 nm to 6 nm and repeating three times, the optical output power was decreased by 5% due to the carrier leakage out of the active region.
Experiment Investigation for Design on the Sensitization-Dependent Passivation Characteristics of AL-6XN in 3.5% NaCl Solution
Authors: Jung Kwang-Hu , Kim Seong-Jong
Published: March 2021

The sensitization and passivation characteristics of AL-6XN heat-treated for up to 24 h at 800 °C were evaluated through double loop electrochemical potentiodynamic reactivation (2 M H2SO4 + 0.01 M KSCN +2 M NaCl solution) and cyclic potentiodynamic polarization
(3.5% NaCl solution) test methods. Furthermore, the dependence between the characteristic values (Epit, Erep, and degree of sensitization) was discussed. The σ phase was precipitated at the intergranular and intragranular in AL-6XN at 800 °C. When the
heat treatment time exceeded 1 hour, AL-6XN occurred rapid sensitization due to the precipitation of σ phase. In a 3.5% NaCl solution, the passivation characteristics of AL-6XN with sensitivity were very poor and depended much on the degree of sensitization.
Semitransparent Thin-Film Dual-Metal Anode for Red-Phosphorescent Organic Light-Emitting Diodes
Authors: Zhang Xue , Lee Ho-Won , Lee Hyeonju , Baang Sungkeun , Park Jaehoon
Published: March 2021

Semitransparent dual-metal electrodes comprising several thin layers of metals, such as Ni, Ag, Cu, and Al, were developed for designing flexible red-phosphorescent organic light-emitting diodes (OLEDs). The said diodes were fabricated by first depositing a Ni layer on four glass and
polyethylene terephthalate (PET) substrates each to facilitate adhesion with glass and a flexible PET substrate. Subsequently, a conductive layer of Ni, Ag, Cu, and Al was stacked atop the first Ni layer on the four glass and PET substrates each, respectively. The proof of principles has been
employed to demonstrate the performance potential via optical, physical, and electrical analyses of dual-as well as single-metal layers prior to device realization. In addition, their electrical and optical characteristics were compared against those of In-Sn-oxide-based OLEDs to demonstrate
their potential with regard to application flexibility.
Lambertian Extraction of Light from Organic Light-Emitting Devices Using Randomly Dispersed Sub-Wavelength Pillar Arrays
Authors: Kim Hyong-Jun , Kim Wanseo , Cho Hwanhee
Published: March 2021

A simple light extraction method is reported to minimize the variation in emission spectrum with viewing angle by embedding a light extraction layer, consists of randomly dispersed nano-pillars on a substrate. Nano-imprint lithography technique was employed to fabricate the nano-pillars
using ultra-violet curable acrylate. An organic light emitting diode device employing the imprint technology showed 46% enhancement in light extraction efficiency in the forward direction with Lambertian emission pattern and no color change with viewing angle. Moreover, the emitted light does
not show any specific periodic patterns.
The Effect of Particle Size on the Charge Balance Property of Quantum Dot Light-Emitting Devices Using Zinc Oxide Nanoparticles
Authors: Ha Mi-Young , Kim Chang Kyo , Moon Dae-Gyu
Published: March 2021

Zinc oxide nanoparticles (ZnO NPs) have been widely used as an inorganic electron transport layer (ETL) in quantum dot light-emitting devices (QLEDs) due to their excellent electrical properties. Here, we report the effect of ZnO NPs inorganic ETL of different particle sizes on the
electrical and optical properties of QLEDs. We synthesized ZnO NPs into the size of 3 nm and 8 nm respectively and used them as an inorganic ETL of QLEDs. The particle size and crystal structure of the synthesized ZnO NPs were verified by Transmission electron microscopy (TEM) analysis and
X-ray pattern analysis. The device with 8 nm ZnO NPs ETL exhibited higher efficiency than the 3 nm ZnO NPs ETL device in the single hole transport layer (HTL) QLEDs. The maximum current efficiency of 19.0 cd/A was achieved in the device with 8 nm ZnO NPs layer. We obtained the maximum current
efficiency of 17.5 cd/A in 3 nm ZnO NPs device by optimizing bilayer HTL and ZnO NPs ETL.
Synthesis and Blue Pixel Property of New Violet Dye for Image Sensors
Authors: Park Sunwoo , Kang Seokwoo , Kim Hokyeom , Park Sanshin , Kwon Hyukmin , Lee Seungeun , Park Jongwook
Published: March 2021

In this study, a blue photoresist with the hybrid dye-pigment system was developed by mixing xanthene-based dye (XPDIA) and blue pigment 15:6 (1:1, 5 wt% of total mixture amount) in order to develop high-performance image sensors with high thermal and chemical stability. The colorant
used in this study has the nano-sized particle of around 100 nm and the physical property is related with the photonic property in image sensor application such as the cameras of mobile phone, car black box, security, etc. The hybrid dye-pigment system showed a high transmittance of more than
90% at 450 nm, and Δab showed very low color difference of 0.52. In solvent resistance, high transmittance of 90% was perfectly maintained, and Δab showed low color difference of 1.08. Migration test result exhibited no change at all after dipping in PGMEA
transmittance spectrum. These results are due to the high absorption optical properties of XPDIA dye in the HDPS and the high thermal and chemical stability properties of the PB15:6 pigment. As a result, it was confirmed that the mixed blue hybrid spin coating film exhibited excellent thermal
and chemical stability as well as good optical property.
High Efficiency Green Fluorescent Dopant Through the Optimized Side Group for Organic Light Emitting Diodes
Authors: Kwon Hyukmin , Kang Seokwoo , Park Sangshin , Park Sunwoo , Lee Seungeun , Park Jongwook
Published: March 2021

OLED light emitting materials have a molecular size corresponding to the nano scale and are converted into light energy when given electrical energy. The new green fluorescent dopant material was successfully synthesized by using anthracene as a central core and introducing a methyl
group and tert-butyl group at various positions as diphenylamine group. Two compounds are N9,N9,N10,N10-tetraphenylanthracene-9,10-diamine (TAD) and N9,N10-bis(4-(tert-butyl) phenyl)-N9,N10-di-o-tolylanthracene-9,10-diamine
(p-Tb-o-Me-TAD). The synthesized material emits green light with the maximum wavelengths of 508 and 523 nm. p-Tb-o-Me-TAD shows excellent PLQY of 86.2% in solution state. When the synthesized material was used as a dopant in a device, TAD showed current efficiency (CE) of 17.71
cd/A and external quantum efficiency (EQE) of 6.11%. The device using p-Tb-o-Me-TAD dopant exhibited current efficiency (CE) of 24.24 cd/A and external quantum efficiency (EQE) of 7.27%.
Enhancing Performance of Perovskite Solar Cells by TiCl4 Treatment on the Surface Roughness of the Titanium Dioxide Layer
Authors: Dang Truyen Hai , Kim Sangmo , Kim Maro , Bark Chung Wung
Published: March 2021

Perovskite solar cells have been attracting extensive attention because of their superior photovoltaic performances and lower costs as compared to those of prevailing photovoltaic technologies. There are four main interfaces in perovskite solar cells: flourine-doped tin oxide/electron
transport layer, electron transport layer/perovskite layer, perovskite layer/hole transport layer, and hole transport layer/metal electrode. Among them, the interface between the perovskite layer (general formula RPbX3) and electron transport layer significantly affects the power
conversion efficiency. In this study, a layer of TiO2, which is the most popular metal oxides used for perovskite solar cells applications, was deposited as the electron transport layer. To enhance the perovskite solar cells performance, surface treatment was performed with TiCl4
(80 mM). To investigate the effect of TiCl4 treatment, ultraviolet-visible spectroscopy was performed on the perovskite film. Atomic force microscopy, X-ray diffraction, scanning electron microscopy and performance of perovskite solar cells have been also evaluated in this paper.
The results indicated that the TiCl4 treatment significantly improved the perovskite solar cells performance.
Preparation of Hexagonal SrMnO3 High-Quality Target for Magnetron Sputtering
Authors: He Rui , Kim Sang Mo , Kim Ma Ro , Tang Rui , Bark Chung Wung
Published: March 2021

In recent years, the optical behavior of complex oxides are being increasingly used in light-harvesting applications. Perovskites are promising candidates for photovoltaic, photocatalytic, and optoelectric applications because of tunable band gaps and other unique properties such as
fer-roelectricity To study the optical behavior of ferromagnetic-ferroelectric oxides, SrMnO3 (SMO3) targets intended for use in magnetron sputtering were prepared using SrCO3 (99.99%) and Mn2O3 (99.99%) powders by a two-step solid reaction
method. Experiments were performed at various temperatures to determine the optimum calcination temperature of the SMO3 powder (1000 °C) and optimum sintering temperature of the prepared target (1300 °C), in an effort to optimize the preparation process of the target at
the laboratory scale and reduce the cost of the target by more than 20-fold. Samples of the ground powder were calcined at 800, 1000, 1200, and 1300 °C for 10 h, and the resultant targets were pressed into 1 -in molds after grinding and subsequently sintered at the same temperatures at
which the corresponding powders were calcined, i.e., at 800, 1000, 1200, and 1300 °Cfor 48 h. The microcrystalline state of the powders was observed by scanning electron microscopy. The prepared targets were analyzed by X-ray diffraction, and the results were compared with the powder diffraction
file card of hexagonal SMO3 to determine the optimum calcination temperature and sintering temperature of the powder formulation. Finally, the Vickers hardness values of the targets were measured, and the optimum target preparation process was determined.
Factors Influencing the Motivations and Perceived Usefulness of a Weather Radar Display in Tampa Bay
Authors: Saunders Michelle E. , Collins Jennifer M.
Published: March 2021

Weather information is widely available across many media platforms, including televisions, computers, smartphones, and tablets. In addition to weather forecast information, people are seeking and using a variety of weather information sources that provide them with current conditions and include tools such as satellite images and weather radar displays. However, little is known about how individuals use and perceive information from weather radar displays, despite the existence of radar since the 1940s. This study is a novel exploration of how Tampa Bay area residents use radar and identifies several important factors that influence how useful radar is perceived to be as a decision-making tool. It also investigates what information radar users find most important when choosing to view a radar display, as well as what electronic sources are used most often to access weather radar. The final goal of this study is to identify which activities motivate a Tampa Bay resident to view weather radar. Data were collected using an online survey instrument. This study finds that survey respondents in the Tampa Bay area frequently view a weather radar display and find it to be a very useful tool. Respondents who reported greater accuracy for the location of precipitation on a radar display were more likely to rate the radar display as being more useful. The majority of respondents indicate they use a smartphone device to view radar most often and that participating in outdoor activities was an important motivator for using radar.
Reply to “Comments on ‘Flash Flood Verification: Pondering Precipitation Proxies’”
Authors: Schumacher Russ S. , Herman Gregory R.
Published: March 2021

We applaud Gourley and Vergara for their thorough investigation of the relationship between precipitation and flash flood reports, as well as their inclusion of information from advanced hydrologic model output. We conducted some additional analysis to identify the reasons for the substantial differences between their findings and ours. The primary reason for the differences was found to be temporal sampling. The high temporal resolution of the MRMS dataset, as well as their use of “rolling” accumulation periods, explains most of the discrepancies. For guidance related to real-time warning decisions for flash flooding, Gourley and Vergara’s analyses provide an important new guide and we recommend the use of their results for this purpose. For other applications, including model postprocessing and for precipitation datasets with lower temporal resolution, our results will continue to prove useful.
Carl Toldt Centennial, Surgeon and Anatomist
Authors: Serena Giuseppe , Nardi Leonardo , Schmeisser Michael J. , Angus L. D. George
Published: March 2021

Carl Florian Toldt was an Austrian anatomist who made meaningful contributions worldwide and defined what is one of the most important surgical landmarks in abdominal surgery. Through his research studies, the embryologic dissection plane known as the “White Line of Toldt” represents an important anatomical landmark that helps to mobilize either the ascending or descending colon. His career spanned over 45 years, beginning in Verona and continuing to Prague and Vienna. He was an author of several innovative books and scientific articles regarding micro- and macroscopic anatomy. In addition, he received numerous recognitions and prizes for his work, making him an essential figure in the medical scientific community. Even a street in Vienna, Karl-Toldt-Weg, is named in his honor. The purpose of this historical article is to celebrate and honor Toldt 100 years following his death, remembering his scientific contributions to the medical and surgical fields and giving thanks for his numerous accomplishments. This article brings light to the man behind the eponym.
Treatment of Gastroesophageal Reflux Disease After Lung Transplant Using Radiofrequency Ablation to the Lower Esophageal Sphincter (Stretta Procedure)
Authors: Kolbeinsson Hordur M. , Lawson Cameron , Banks-Venegoni Amy , Girgis Reda , Scheeres David E.
Published: March 2021

Background

Gastroesophageal reflux disease (GERD) is associated with chronic lung allograft dysfunction after lung transplant. Treating GERD after lung transplant has been shown to improve lung allograft function. This case series describes the efficacy of the Stretta procedure to control GERD after lung transplant at our institution.

Methods

Eleven patients underwent the Stretta procedure at our institution for GERD after lung transplant during the years 2016-2017. Pre- and post-Stretta reflux parameters were gathered. Pulmonary function was followed up until subsequent fundoplication surgery, death, or end of study observation.

Results

Reflux on esophagram was noted in 9 patients before Stretta and 8 patients after Stretta. The median number of acid reflux events was 31.5 vs. 26 after Stretta ( P = .95), and median percent time in reflux was 17.7% before vs. 14.5% after Stretta ( P = .76). Median DeMeester score before Stretta was 65.5 (range: 33.2-169.8) vs. 42.5 (range: 19.2-109.8) after the procedure ( P = .14). Median lower esophageal resting pressure was 20.7 mm Hg (n = 7) compared to 25.9 mm Hg (n = 9) on post-Stretta follow-up ( P = .99). Median FEV1% predicted was 84% (41-97%) before compared to 71% (23-108%) at 1 year after the procedure ( P = .14). Seven patients required fundoplication surgery for continued reflux. All patients were on triple immunosuppression, most commonly prednisone, tacrolimus, and mycophenolate (n = 9).

Discussion

The Stretta procedure did not provide expected results at our institution after lung transplant surgery. Based on our limited series, we do not recommend routine use of the Stretta procedure for management of GERD in lung transplant patients.
Valuing the voice of lived experience of eating disorders in the research process: Benefits and considerations
Authors: Musić Selma , Elwyn Rosiel , Fountas Grace , Gnatt Inge , Jenkins Zoe M , Malcolm Amy , Miles Stephanie , Neill Erica , Simpson Tamara , Yolland Caitlin OB , Phillipou Andrea
Published: March 2021

Although the inclusion of individuals with lived experience is encouraged within the research process, there remains inconsistent direct involvement in many mental health fields. Within the eating disorders field specifically, there is a very strong and increasing presence of lived experience advocacy. However, due to a number of potential challenges, research undertaken in consultation or in collaboration with individuals with lived experience of an eating disorder is scarce. This paper describes the significant benefits of the inclusion of individuals with lived experience in research. The specific challenges and barriers faced in eating disorders research are also outlined. It is concluded that in addition to existing guidelines on working with lived experience collaborators in mental health research, more specific procedures are required when working with those with eating disorders.
Delivering output and struggling for change: Tacit activism among professional transitional justice work in Sierra Leone and Kenya
Authors: Menzel Anne
Published: March 2021

The professionalization of transitional justice (TJ) has received extensive academic attention in TJ and related international relations and peacebuilding scholarship. This article adds an element that has received hardly any attention: namely the presence of activism even among professional and usually donor-funded TJ work. I argue that noticing activism in professional contexts requires attention to the ‘everyday’, meaning to life in between, aside and beyond high politics and officially important actors, actions, processes and events. Based on field research in Sierra Leone and Kenya, I describe and discuss everyday examples of a specific form of activism, namely tacit activism that I encountered with three key interlocutors, one Sierra Leonean and two Kenyan nationals involved in professional donor-funded TJ work. Their activism was ’tacit’ in the sense that it was not part of their official project activities and my interlocutors did not advertise their extra plans and efforts to (prospective) donors. And yet, it was precisely through these tacit plans and efforts that they hoped to meet at least some of the expectations that had been raised in the context of professional TJ projects.
Involuntary psychiatric hospitalization among migrants in Italy: A matched sample study
Authors: Tarsitani Lorenzo , Della Rocca Bianca , Pancheri Corinna , Biondi Massimo , Pasquini Massimo , Ferracuti Stefano , Ventriglio Antonio , Mandarelli Gabriele
Published: March 2021

Background:

Immigrants in Europe appear to be at higher risk of psychiatric coercive interventions. Involuntary psychiatric hospitalization poses significant ethical and clinical challenges. Nonetheless, reasons for migration and other risk factors for involuntary treatment were rarely addressed in previous studies. The aims of this study are to clarify whether immigrant patients with acute mental disorders are at higher risk to be involuntarily admitted to hospital and to explore clinical and migratory factors associated with involuntary treatment.

Methods:

In this cross-sectional matched sample study, we compared the rates of involuntary treatment in a sample of first-generation immigrants admitted in a Psychiatric Intensive Care Unit of a large metropolitan academic hospital to their age-, gender-, and psychiatric diagnosis-matched native counterparts. Clinical, sociodemographic, and migratory variables were collected. The Brief Psychiatric Rating Scale-expanded (BPRS-E) and the Clinical Global Impression-Severity (CGI-S) scale were administered. McNemar test was used for paired categorical variables and a binary logistic regression analysis was performed.

Results:

A total of 234 patients were included in the analysis. Involuntary treatment rates were significantly higher in immigrants as compared to their matched natives (32% vs. 24% respectively; p < .001). Among immigrants, involuntary hospitalization was found to be more frequent in those patients whose length of stay in Italy was less than 2 years (OR = 4.2, 95% CI [1.4–12.7]).

Conclusion:

Recently arrived immigrants appear to be at higher risk of involuntary admission. Since coercive interventions can be traumatic and negatively affect outcomes, strategies to prevent this phenomenon are needed.
Social work and COVID-19: A gap in Nigeria’s intervention
Authors: Agwu Prince , Okoye Uzoma
Published: March 2021

It is highlighted in some parts of the world that several professionals, including social workers, are involved in interventions against COVID-19. This, however, appears not to be so in Nigeria, as social workers are said to be suboptimally involved. Through telephone interviews, the views of six healthcare workers and six social workers were sought on the inclusion and efforts of Nigerian social workers in contributing to COVID-19 interventions. After a thematic analysis of data, results show that social workers are missing in the intervention process, especially at the front line. Hence, this article recommends the need for active involvement of social workers in public health concerns in Nigeria, as their roles will be relevant to complementing the efforts of mainstream health workers.
Practising social work groups online: Practitioners’ reflection on the COVID-19 outbreak
Authors: Hung Elsa Ngai , Lee Terence Tat-Tai , Cheung Johnson Chun-Sing
Published: March 2021

Conducting online social work groups, as a substitute for traditional forms of groups, was uncommon in Hong Kong before the outbreak of COVID-19. Frontline social workers encountered several difficulties and challenges while trying to provide this alternative form of social work intervention. This article serves as a reflection on the use of online social work groups from social work practitioners’ point of view at this critical juncture.
An Oropharyngeal Obstructive Lesion in a Neonate
Authors: Vimawala Swar N. , Shaikh Hamza A. , Rafferty William J. , Solomon Donald
Published: March 2021

Neonatal HNT in the pharynx is a rare cause of respiratory distress and poor feeding in the newborn, but must be differentiated from teratoma, encephalocele, and nasal glioma. While surgical resection is the preferred treatment modality, we posit there is a role for sclerosis of the glial heterotopic cyst if complete surgical excision is not possible or carries risk of high morbidity. Here, we present a case of a 7-day-old neonate presenting with acute respiratory distress found to have a nasopharyngeal/oropharyngeal mass ultimately treated with sclerotherapy at 9 months of age.
School Counselor Burnout, Job Stress, and Job Satisfaction by Student Caseload
Authors: Mullen Patrick R. , Chae Nancy , Backer Adrienne , Niles Jennifer
Published: March 2021

In this cross-sectional quantitative study, we employed survey research to examine the differences in school counselors’ ( N = 327) burnout, job stress, and job satisfaction based on their student caseload size. The results indicated that higher caseloads were associated with higher degrees of burnout and job stress, along with lower job satisfaction. The results produced small to medium effect sizes. We discussed how such factors relate to the effectiveness of providing student services and school leaders’ support for school counselors.
Assessment for learning: The missing element for identifying high potential in low income and minority groups
Authors: Renzulli Joseph S
Published: March 2021

A major controversy facing the field of gifted education is the underrepresentation of low income, minority, and dual language students. Strategies for addressing this challenge have been to use universal screening and local norms; however, these useful recommendations continue to focus on traditional testing procedures that measure what students already know and overlook other important traits that contribute to high levels of creative productivity. Assessment for learning examines traits such as interests, instructional preference styles, preferred modes of expression, and executive function skills. Although sometimes referred as the “soft skills,” they have gained much more attention on the parts of college admission officers and employers, especially for higher level leadership positions. Instruments that assess these traits are often completed by the students themselves; and technology and artificial intelligence now allow us to administer and analyze them with the same ease used for traditional standardized tests.
Rest ventilator management in children on veno-venous extracorporeal membrane oxygenation
Authors: Friedman Matthew L , Abu-Sultaneh Samer , Slaven James E , Mastropietro Christopher W
Published: March 2021

Background:

We aimed to use the Extracorporeal Life Support Organization registry to describe the current practice of rest mechanical ventilation setting in children receiving veno-venous extracorporeal membrane oxygenation (V-V ECMO) and to determine if relationships exist between ventilator settings and mortality.

Methods:

Data for patients 14 days to 18 years old who received V-V ECMO from 2012-2016 were reviewed. Mechanical ventilation data available includes mode and settings at 24 h after ECMO cannulation. Multivariable logistic regression analysis was performed to determine if rest settings were associated with mortality.

Results:

We reviewed 1161 subjects, of which 1022 (88%) received conventional mechanical ventilation on ECMO. Rest settings, expressed as medians (25th%, 75th%), are as follows: rate 12 breaths/minute (10, 17); peak inspiratory pressure (PIP) 22 cmH2O (20,27); positive end expiratory pressure (PEEP) 10 cmH2O (8, 10); and fraction of inspired oxygen (FiO2) 0.4 (0.37, 0.60). Survival to discharge was 68%. Higher ventilator FiO2 (odds ratio:1.13 per 0.1 increase, 95% confidence interval:1.04, 1.23), independent of arterial oxygen saturation, was associated with mortality.

Conclusions:

Current rest ventilator management for children receiving V-V ECMO primarily relies on conventional mechanical ventilation with moderate amounts of PIP, PEEP, and FiO2. Further study on the relationship between FiO2 and mortality should be pursued.
Large spontaneous steinstrasse: Our experience and management issues in tertiary care centre
Authors: Parmar Kalpesh , Manoharan Vignesh , Kumar Santosh , Ranjan Kumar Rajiv , Chandna Abhishek , Chaudhary Kapil
Published: March 2021

Background:

Steinstrasse, is described as array of stone pieces in the ureter following extracorporeal shock wave lithotripsy (SWL). It is well-recognized, transient event. Steinstrasse clears spontaneously, however about 6% require intervention. Spontaneous steinstrasse without prior history of SWL is a rare occurrence and only few case reports are published in literature. Objective of the study was to assess the aetiology and management issues of large spontaneous steinstrasse in our centre.

Method:

From February 2017 to March 2019, 684 patients underwent SWL for renal or ureteric stones. Twenty-eight patients presented with steinstrasse of which nine patients had no prior history of SWL. Detailed clinical profile and management issues have been discussed.

Result:

Among the nine patients of spontaneous steinstrasse, there were six males and three females. Mean age of the patients was 39 years (±13 years SD). Bilateral large spontaneous steinstrasse was seen in one out of nine patients. Seven patients had associated renal stones. Five patients presented with obstructive uropathy and three out of them had urosepsis as initial presentation. Ureterolithotomy and percutaneous nephrolithotomy were commonly performed procedures for stone clearance. Metabolic work was done in all cases in follow up period. Three patients had hypercalciuria and hypocitraturia suggestive of renal tubular acidosis.

Conclusion:

Large spontaneous steinstrasse is uncommon case scenario. It can be subtle in presentation and yet have significant patient consequence in terms of renal function and infection. Prompt management is essential to preclude permanent loss of renal function. Metabolic evaluation is indispensable in such cases.
Hello Darkness, My Old Friend: A Tutorial of Nanda-Hamner Protocols
Authors: Teets Nicholas M. , Meuti Megan E.
Published: March 2021

Plants and animals use circadian and photoperiodic timekeeping mechanisms to respond to daily and seasonal changes in light:dark and appropriately coordinate their development. Although the mechanisms that may connect the circadian and photoperiodic clock are still unclear in many species, researchers have been using Nanda-Hamner protocols for decades to elucidate how seasonal time is measured and determine whether seasonal responses have a circadian basis in a given species. In this brief tutorial we describe how to design and interpret the results of Nanda-Hamner experiments, and provide suggestions on how to use both Nanda-Hamner protocols and modern molecular experiments to better understand the mechanisms of seasonal timekeeping.
Implementing Evidence-Based Practices in School Psychology: Excavation by De-Implementing the Disproved
Authors: Shaw Steven R.
Published: March 2021

The scientist-practitioner model of practice is the most common approach to the profession of school psychology and embraces evidence-based practices as foundations of clinical practice. The focus on evidence-based practices involves not only using the preponderance of research to determine what works, but also how to implement these practices effectively. An important impediment to implementing innovative evidence-based practices is that interventions and practices that have been proved ineffective or of low value continue to be used in education and psychology. What are the issues that assist in discontinuing practices that are widely used, but have been disproved or are otherwise problematic? How can room be made for more effective, innovative, and evidence-based practices? This issue of the Canadian Journal of School Psychology is devoted to exploration of different forms of disproved, low value, or problematic practices, factors that keep these practices alive in schools, and how to best de-implement ineffective, low value, and problematic practices. If the scientist-practitioner model is to be defined largely by the implementation of evidence-based practices, then de-implementation will be a critical aspect in the evolution of the profession of school psychology.
Emergency Department Admissions for Physical Child Abuse: Evidence from the 2006-2017 Nationwide Emergency Department Sample
Authors: Carbone Jason T. , Kremer Kristen P. , Holzer Katherine J. , Kondis Jamie S. , Vaughn Michael G.
Published: March 2021

Physical child abuse continues to be a serious public health issue in the United States. This study expands on previous research by exploring trends in physical child abuse diagnoses among children admitted to emergency departments (EDs) across the United States. The analysis aimed to explicate the association between physical child abuse and both sociodemographic and behavioral health covariates to better inform and identify risk factors associated with ED admissions for abuse. The study also explicated differences between confirmed and suspected physical child abuse cases. The study utilized a nationally representative sample of hospital-owned EDs that included 319,676,625 ED admissions between 2006 and 2017 for children under 18-years-old. The analysis included a trend analysis, bivariate descriptive statistics, and multivariate logistic regression models were employed. Children with a physical child abuse diagnosis were less likely to be from higher income communities (a OR = 0.61, 95% CI [0.53, 0.71]), less likely to be female (a OR = 0.93, 95% CI [0.90, 0.96]), and more likely to be uninsured (a OR = 1.65, 95% CI [1.48, 1.84]). Children with attention-deficit hyperactivity disorder (a OR = 1.36, 95% CI [1.14, 1.62]) and a conduct disorder (a OR = 1.28, 95% CI [1.04, 1.58]) were more likely to have a physical abuse diagnosis. The sex-stratified analyses found that the higher rates of physical abuse among children with attention-deficit hyperactivity disorder were driven by the male subsample, while higher rates of abuse for those with conduct disorders were the result of the female subsample. A supplemental analysis of suspected versus confirmed physical child abuse for the fourth quarter of 2015 through 2017 also revealed sociodemographic and behavioral health differences. This study supports the need to consider sociodemographic and behavioral risk factors associated with physical child abuse to inform treatment and potential reoccurrence of abuse.
The Shape of Space: Evidence for Spontaneous but Flexible Use of Polar Coordinates in Visuospatial Representations
Authors: Yousif Sami R. , Keil Frank C.
Published: March 2021

What is the format of spatial representation? In mathematics, we often conceive of two primary ways of representing 2D space, Cartesian coordinates, which capture horizontal and vertical relations, and polar coordinates, which capture angle and distance relations. Do either of these two coordinate systems play a representational role in the human mind? Six experiments, using a simple visual-matching paradigm, show that (a) representational format is recoverable from the errors that observers make in simple spatial tasks, (b) human-made errors spontaneously favor a polar coordinate system of representation, and (c) observers are capable of using other coordinate systems when acting in highly structured spaces (e.g., grids). We discuss these findings in relation to classic work on dimension independence as well as work on spatial representation at other spatial scales.
Composite adaptive control based on historical data for electro-hydraulic system driven by dual servo motor-pump with unknown disturbance
Authors: Zhang Xiaofu , Shi Guanglin
Published: March 2021

This article presents a composite adaptive control method to improve the position-tracking performance of an electro-hydraulic system driven by dual constant displacement pump and dual servo motor named as a novel electro-hydraulic system with unknown disturbance. A composite adaptive controller based on backstepping method is designed to estimate the uncertainties of electro-hydraulic control system, including the damping coefficient and elastic modulus. In order to release the persistent excitation condition of conventional adaptive control, which is often infeasible in practice, a prediction error based on the online historical data is used to update the estimated parameters. Furthermore, a disturbance observer is used to estimate the disturbance including the unmeasurable load force, friction and other unmodeled disturbance. The experiment results are provided and compared with other methods to verify the effectiveness of the proposed method, and the results have indicated that the proposed method has a better position-tracking performance with the convergent estimated parameters.
Prevalence of Postpartum Depression and Associated Predictors Among Taiwanese Women in a Mother-Child Friendly Hospital
Authors: Shao Hsin-Hui , Lee Shu-Chen , Huang Jian-Pei , Hwang Lee-Ching
Published: March 2021

Postpartum depression (PPD) is a highly prevalent disorder characterized by increased vulnerability to morbidity and mortality. This study explores the predictors and prevalence of PPD among Taiwanese women. A total of 914 postpartum women was recruited from a mother-child-friendly hospital. These participants completed self-report questionnaires at 1 month postpartum, and their medical records were also examined for relevant information. Multivariate analyses were used to identify independent predictors of PPD. At 1 month postpartum, 18.8% had developed PPD. Multivariate analysis showed that the odds ratios for PPD were significantly lower among women who were breastfeeding, had more family support, and attended a postpartum care center, while those who were younger, primiparous, and who experienced gestational complications had a higher prevalence of PPD. Meanwhile, structural equation modeling showed that family support from partners, parents, and parents-in-law diminished depression scores through direct effects.
Effect of shoulder positioning on ultrasonic visualisation of the subclavian vein in healthy adults: A prospective observational study
Authors: Leung Hei Jim , Wong Lok Yu , Pak Chi Shing , Li Chuan Marc Yang
Published: March 2021

Introduction:

Ultrasound guidance is commonly used during central venous cannulation. Subclavian vein is a commonly chosen site, but previous studies found varying results in the ideal positioning of the shoulder for subclavian vein cannulation. The objective of this study is to determine which shoulder position results in the greatest cross-sectional area of the right subclavian vein for cannulation.

Methods:

In this prospective observational study, ultrasound was performed on healthy adult volunteers to visualise the right subclavian vein in three different shoulder positions: neutral, abduction and retraction. A blinded independent investigator measured the cross-sectional areas by computer software using planimetry method. Statistical analysis was performed by one-way repeated measures analysis of variance.

Results:

Forty-four adults participated in the study. The mean cross-sectional area of the right subclavian vein in shoulder neutral, abduction and retraction positions were 1.05 ± 0.33 cm2, 1.01 ± 0.31 cm2 and 0.82 ± 0.28 cm2, respectively. When compared to shoulder retraction, the cross-sectional areas were significantly increased in shoulder neutral ( P < 0.01) and abduction ( P < 0.01) positions. There was no significant difference between shoulder neutral and abduction position ( P = 0.71).

Conclusion:

Positioning the shoulder in neutral or abduction results in the greatest cross-sectional area of the right subclavian vein and may be more ideal for ultrasound guided cannulation.
The Australian Government’s business-friendly employment response to COVID-19: A critical discourse analysis
Authors: O’Keeffe Patrick , Papadopoulos Angelika
Published: March 2021

The COVID-19 pandemic has created economic crises and considerable loss of employment throughout the world. In the Australian context, social distancing restrictions and business closures contributed to a dramatic increase in unemployment, with 780,000 people losing work within weeks of the first COVID-19 outbreaks. Job losses were concentrated in casualised industries such as retail, recreation, arts and culture, hospitality, and accommodation. We examine policy discourses framing independent work, entrepreneurial workers and flexible work relations as essential for ‘economic recovery’, where this means business flexibility, productivity and future economic prosperity. We draw on these framings to show how the equation of flexible work relations and productivity underpins the Australian Government’s response to unemployment caused by the pandemic, as reflected in policy announcements and proposed changes to industrial relations law. In these proposals, constructions of ‘job creation’ and ‘economic recovery’ rationalise industrial relations changes that further empower business, through conflating public and business interest. At the same time, ensuing labour market deregulation and the changing profile of business renders the very idea of ‘jobs’ tendentious.