bluuebunny/crossref_metadata_2025_split huggingface dataset:
Radiofrequency catheter ablation of premature ventricular contractions from the mitral annulus in patients without structural heart disease
Authors: Antoku Yoshibumi , Takemoto Masao , Tanaka Atsushi , Mito Takahiro , Masumoto Akihiro , Ueno Takafumi , Tsuchihashi Takuya 
Published: September 2020

AbstractIntroductionWe previously reported the clinical benefits of radiofrequency catheter ablation (RFCA) of premature ventricular contractions (PVCs) from the right ventricular outflow tract or near the His‐bundle, which can often deteriorate the clinical status. PVCs from the mitral valve (MA‐PVCs) also often deteriorate the patients’ clinical status. This study aimed to evaluate the effect of ablating MA‐PVCs with RFCA from a trans‐interatrial septal approach on the clinical status in symptomatic patients with frequent MA‐PVCs without structural heart disease.MethodsThe frequency of PVCs per the total heart beats by 24‐hours Holter monitoring and New York Heart Association (NYHA) functional class in 22 patients with MA‐PVCs were evaluated before and 6 months after RFCA.ResultsProcedural success was achieved in 20 (91%) of 22 patients. Of the 22 patients, in 15 (68%) and 1 (5%) patient, a successful RFCA on the left ventricular side of the MA using the trans‐interatrial septal approach and trans‐coronary sinus approach was achieved. Interestingly, in four (18%) patients, a successful RFCA on the left atrial (LA) side of the MA using a trans‐interatrial septal approach was achieved. Ablating MA‐PVCs readily improved the NYHA functional class compared to that before. A ≥0.62 peak deflection index and ≤30 years old may be one of the important predictors of successfully ablated MA‐PVCs from the LA side of the MA.ConclusionsRFCA produces clinical benefits in patients with MA‐PVCs. Further, it may be necessary to initially consider a trans‐interatrial septal approach to ablate these PVCs.
Making nice or faking nice? Exploring supervisors’ two‐faced response to their past abusive behavior
Authors: McClean Shawn T. , Courtright Stephen H. , Yim Junhyok , Smith Troy A. 
Published: September 2020

AbstractAlthough extant research has shown that abusive supervision is a destructive and immoral form of leader behavior, theory provides conflicting perspectives on how supervisors respond to their own abusive behavior. We therefore draw upon and integrate moral cleansing theory and impression management and construction theory to explore whether and when supervisors engage in genuine reparations or impression management following episodes of abusive behavior. Results taken from a 3‐week, experience sampling study of supervisors suggest support for the impression management path; following episodes of abusive behavior, supervisors higher on symbolized moral identity become more concerned with their image, and thus engage in increased ingratiation, self‐promotion, and exemplification toward their subordinates. In contrast, we found no support for the genuine, moral cleansing path. This study thus extends knowledge regarding supervisors’ responses to their own abusive behavior, challenging the existing notion that such responses are genuine and focused on addressing the moral implications of the behavior.
Navigating relational turbulence in the wake of weight loss transitions: A support marshaling analysis
Authors: Crowley John P. , Burke Tricia , Denes Amanda , Allred Ryan , Carberry Emmalene 
Published: September 2020

AbstractThe current study sought to investigate how individuals optimize their partner's support during a weight transition to accomplish their weight loss goals. A theoretical model was tested to determine the role of support marshaling in managing the relational turbulence associated with weight transitions. Path modeling broadly identified that support marshaling is a useful framework from which to consider how relational turbulence associated with weight transitions influences health behaviors. The results identify that partner facilitation and interference are both directly related to health behaviors and indirectly related to health behaviors through support marshaling. Theoretical implications for relational turbulence and support marshaling are discussed with regard to their ability to account for weight‐related behavior changes.
Scent chemistry and pollinators in the holoparasitic plant Cynomorium songaricum (Cynomoriaceae)
Authors: Wang D. , Yu H. , Chen G. 
Published: September 2020

Abstract

Holoparasitic plants are interesting heterotrophic angiosperms. However, carrion‐ or faeces‐mimicking is rarely described for such plants. There is no information on the pollination biology of Cynomoriaceae, despite the fact that these plants are rare and vulnerable. This is the first study to reveal pollination in a member of this family, Cynomorium songaricum, a root holoparasite with a distinctive and putrid floral odour.

From 2016 to 2018, we studied the floral volatiles, floral visitors and pollinators, behavioural responses of visitors to floral volatiles, breeding system, flowering phenology and floral biology of two wild populations of C. songaricum in Alxa, Inner Mongolia, China.

A total of 42 volatiles were identified in inflorescences of C. songaricum. Among these volatiles are compounds known as typical carrion scents, such as p‐cresol, indole, dimethyl disulphide and 1‐octen‐3‐ol. C. songaricum is pollinated by various Diptera, such as Musca domestica, M. stabulans (Muscidae), Delia setigera, D. platura (Anthomyiidae), Lucilia sericata, L. caesar (Calliphoridae), Wohlfahrtia indigens, Sarcophaga noverca, S. crassipalpis and Sarcophila meridionalis (Sarcophagidae). The inflorescence scent of C. songaricum attracted these pollinators. The plants significantly benefit from insect pollination, although wind can be a pollen vector in the absence of pollinators. C. songaricum is a cross‐pollinated, self‐incompatible plant.

Our findings suggest that C. songaricum releases malodorous volatiles to attract Diptera to achieve pollination. This new example lays the foundation for further comparative studies in other members of this plant group and contributes to a better understanding of fly‐pollinated, carrion mimicking plants.
Accountability in transnational governance: The partial organization of voluntary sustainability standards in long‐term account‐giving
Authors: Arnold Nadine 
Published: September 2020

AbstractTransnational sustainability governance often builds upon standards. Considering that the rise of transnational governance has blurred accountability relations, this article interrogates how and with what consequences a standards development organization (SDO) mobilizes standards for the sake of accountability. Following a partial organization perspective, standards are conceptualized as combinations of organizational elements that enhance accountability both retrospectively and prospectively. A historical case study of the Fairtrade program details the argument and shows how the SDO modified standards aligned with institutional expectations. As the alteration of one organizational element led to a chain reaction, the standards unintentionally transformed from an organizationally lenient tool into a sophisticated blend of organizational elements. Thus, the standards strengthened the accountability of those being governed, while accountability to the public was enhanced by changes in the organizational structure of the SDO. The article contributes to a nuanced understanding of the link between accountability and standards, highlighting their contingency and context dependency.
Community‐engaged sustainable health care education
Authors: Teherani Arianne , Nikjoo Arya , den Boer Alanya , Tong Michelle Sun , Desai Anya 
Published: September 2020

SUMMARYBackgroundClimate and ecological changes substantially impact human health. Sustainable health care education (SHE) teaches health professions students about the interdependence of ecosystems and human health, the health sector's impact on the environment, and sustainable solutions for both ecosystems and human health. Yet little is understood about the methods used to facilitate SHE learning within the local context. Community‐engaged medical education (CEME), a concept used in medicine and other health professions, underscores the relationship between the community served and education, which is both interdependent and reciprocal. Our objective was to characterise how SHE could be made relevant to the local context and the health of the community.MethodsQualitative content analysis was used to explore the perspectives of faculty members, community experts and health professions students on the relationship between SHE and CEME. Semi‐structured interviews were conducted with 51 participants between March 2016 and May 2017.ResultsParticipants highlighted that it was vital for students to become familiar with real‐world, locally relevant issues by collaborating with community members and identifying opportunities for engagement. For optimal learning, CEME experiences should be accompanied by relevant curricular changes. Educational partnerships with local organisations, societies and activists provide continuing opportunities for dialogue about, and integration of, SHE.DiscussionThe integration of SHE through CEME will draw the community voice into the curriculum and will compel students to connect CEME SHE learning to their continuing education. The credible and respected role of the health professionals and health professions institutions provide a foundation for the development of community partnerships and the promotion of SHE.The integration of SHE through CEME will draw the community voice into the curriculum and will compel students to connect CEME SHE learning to their continuing education
Successful cord blood transplantation for myelodysplastic syndrome complicated by Mycobacterium kansasii pneumonia
Authors: Yamada Arisa , Akahane Daigo , Katagiri Seiichiro , Yoshizawa Seiichiro , Furuya Nahoko , Fujimoto Hiroaki , Gotoh Moritaka , Gotoh Akihiko 
Published: September 2020

AbstractNon‐tuberculous mycobacterial (NTM) disease is a rare cause of neutropenic fever in patients with hematological malignancies. There are few studies on the optimal management for such patients with NTM. We report a case of myelodysplastic syndrome (MDS) treated by umbilical cord blood transplantation (CBT) after Mycobacterium kansasii (M kansasii) pneumonia. A 38‐year‐old man diagnosed with MDS developed severe pneumonia during induction chemotherapy. Repeated sputum culture uncovered mycobacterium infection. Then, by the polymerase chain reaction of the bronchial lavage fluid, M kansasii infection was proven. After 140 days of anti‐NTM therapy, CBT was successfully carried out and the patient recovered without recurrence of NTM infection. This case provides valuable evidence that hematopoietic stem cell transplantation is feasible after a reliable diagnosis and continuous anti‐NTM therapy.
Surgical treatment and outcome of complete unilateral urinary tract duplication in a dog
Authors: Sprocatti Mara , Reese David , Charlesworth Tim 
Published: September 2020

AbstractObjectiveTo report the surgical technique and outcome for correction of complete unilateral duplication of the left urinary tract in a dog.AnimalsOne 7‐month‐old entire male Jack Russell terrier.Study designCase reportMethodsA dog was referred for investigation because of urinary incontinence (UI), preputial irritation (pruritus), diphallia, and cryptorchidism. Computed tomography including urethrographic studies revealed a left duplex kidney, double ectopic left ureters, and a duplex urinary bladder comprising two halves separated by a median septum, each of which emptied into a separate urethra which coursed through separate penises. The left testis was abdominally retained. The right upper urinary tract was considered normal, and the right testis was within the scrotum. Left sided ureteronephrectomy was performed, the median bladder septum was ablated, and the left urethra was ligated. The left penis was partially amputated, and the dog was castrated.ResultsUrinary incontinence was improved but persisted after surgery. After repeat imaging, revision surgery was performed 3 months later in which the distal stumps of the (left) ectopic ureters were found to be filling with urine from the right urethra. Urinary incontinence resolved after resection of these ureteric stumps from the prostate and complete transection of the left urethra.ConclusionExtensive surgery with resection and correction of urinary tract duplication was successful in resolving UI in this case. Urogenital duplication should be considered a rare cause of UI. The presence of external congenital deformity (eg, diphallia) should alert clinicians to the possibility of significant concurrent internal abnormalities.
Thermal Comfort and Energy Savings in a Simulated Office Conditioned by a Transient Personalized Ventilator and a Displacement Ventilation System
Authors: Al Assad Douaa , Ghali Kamel , Ghaddar Nesreen , Katramiz Elvire 
Published: September 2020

Abstract
The aim of this work is to evaluate the performance of an intermittent personalized ventilation (IPV) system assisting a displacement ventilation (DV) system to improve thermal comfort and save energy. This will be conducted by developing a transient 3D computational fluid dynamics (CFD) model of an occupied office space equipped with systems. The occupant is modeled by a heated thermal manikin replicating the human body. The CFD model is coupled with a transient bio-heat model to compute segmental skin temperatures and their rate of change. The latter are taken as input into Zhang’s comfort model to predict and overall thermal comfort.
The model was used to conduct a case study, where the overall thermal comfort and energy savings will be assessed for the IPV + DV These results will be compared with those of steady personalized ventilation (PV) + DV and standalone DV systems. By varying the IPV frequency in the typical indoor range of [0.3 Hz – 1 Hz], it was found that the IPV + DV system was able to enhance comfort compared to steady PV + DV and a standalone DV. In addition, an energy analysis was conducted and it was shown that the IPV was able to achieve considerable energy savings compared to a steady PV + DV at the same thermal comfort level. Moreover, relaxing the DV supply temperature to higher occupied zone temperatures, can provide additional energy savings while still maintaining comfort levels in the space.
A Thermally Actuated Microvalve for Irrigation in Precision Agriculture Applications
Authors: Bamido Alaba , Thyagarajan Ashok , Shettigar Nandan , Banerjee Debjyoti 
Published: September 2020

Abstract
It is currently impossible to control irrigation at the level of a single plant. Even with drip irrigation, in which emitters could conceivably be placed on a plant-by-plant basis, there is no way to control the amount of water emitted according to the needs of the individual plants. If such a capability were practically available on farms, the result would be a step change in precision agriculture, such that the water input for every plant in a farm (or field) could be optimized. Therefore, we are exploring the possibility of developing a microfluidic system that could be controlled, capillary by capillary, to deliver the needed amount of water to individual plants in a large field. The principal aim is to show proof of concept by building and testing a prototype to produce data suggestive of the potential for multiple individually controllable microfluidic ports along a pressurized tube of water. Hence, in this study we perform experiments using a thermally actuated microvalve for irrigation in precision agriculture applications. The microvalve was manufactured using soft-lithography techniques, i.e., using polydimethylsiloxane (PDMS). The active microvalve was designed for a “normally open” configuration and consists of two layers: (1) a flow layer and (2) a control layer. The flow layer contains the water inlet, outlet, and the flow channels for passage of water. The control layer contains an enclosure (chamber) which expands upon heating, which in turn deforms a thin membrane into the flow layer and thus impedes (or reduces) the water flow rate in the flow layer. Both layers are bonded together and then on a glass substrate. The bonded PDMS microvalve and glass assembly is heated to different temperatures for enabling the actuation of the microvalve. Experiments were performed using two microvalves of identical design but with two different actuation fluids. The first design used the control chamber filled the air while the second design used the control chamber containing a Phase Change Material (PCM). Experiments were performed to determine the reduction of water flowrate as the membrane deforms with increase in temperature. Water flows into the inlet of the microvalve from a syringe barrel, with a hydrostatic pressure head of about 0.62 [m]. The water from the microvalve outlet was collected in a 10[ml] pipette. The results show that the water flowrate decreased as the temperature at the base of the microvalve was increased. There was a 60% and 40% reduction in the water flowrate through the microvalve design with control chamber containing air and PCM (phase change material) respectively.
Verification of ANSYS and Matlab Conduction Results Using Analytical Solutions
Authors: McMasters Robert L. , de Monte Filippo , D'Alessandro Giampaolo , Beck James V. 
Published: September 2020

Abstract
A two-dimensional transient thermal conduction problem is examined and numerical solutions to the problem generated by ANSYS and Matlab, employing the finite element method, are compared against an analytical solution. Various different grid densities and time-step combinations are used in the numerical solutions, including some as recommended by default in the ANSYS software, including coarse, medium and fine spatial grids. The transient temperature solutions from the analytical and numerical schemes are compared at four specific locations on the body and time-dependent error curves are generated for each point. Additionally, tabular values of each solution are presented for a more detailed comparison.
The errors found in the numerical solutions by comparing them directly with the analytical solution vary depending primarily on the time step size used. The errors are much larger if calculated using the analytical solution at a given time as a basis of the comparison between the two solutions as opposed to using the steady-state temperature as a basis. The largest errors appear in the early time steps of the problem, which is typically the regime wherein the largest errors occur in mathematical solutions to transient conduction problems. Conversely, errors at larger values of dimensionless time are extremely small and the numerical solutions agree within one tenth of one percent of the analytical solutions at even the worst locations.
In addition to difficulties during the early time values of the problem, temperatures calculated on convective boundaries or prescribed-heat-flux boundaries are locations generating larger-magnitude errors. Corners are particularly difficult locations and require finer gridding and finer time steps in order to generate a very precise solution from a numerical code. These regions are compared, using several grid densities, against the analytical solutions. The analytical solutions are, in turn, intrinsically verified to eight significant digits by comparing similar analytical solutions against one another at very small values of dimensionless time. The solution developed using the Matlab differential equation solver was found to have errors of a similar magnitude to those generated using ANSYS.
Two different test cases are examined for the various numerical solutions using the selected grid densities. The first case involves steady heating on a portion of one surface for a long duration, up to a dimensionless time of 30. The second test case involves constant heating for a dimensionless time of one, immediately followed by an insulated condition on that same surface for another duration of one dimensionless time unit. Although the errors at large times were extremely small, the errors found within the short duration test were more significant.
Experimental and Numerical Study of Nucleate Pool Boiling Heat Transfer and Bubble Dynamics in Saline Solution
Authors: Liu Qi , Wu Yuxin , Zhang Yang , Lyu Junfu 
Published: September 2020

Abstract
A visual pool boiling experimental device based on ITO coating layer heater and high-speed shooting technology was established for studying the bubble behavior and heat transfer characteristics of saline solution, which is of great significance for ensuring heat transfer safety in nuclear power plants, steam injection boilers and seawater desalination. Volume of fluid method was applied to simulate numerically the liquid–vapor phase change by adding source terms in the continuity equation and energy equation. The predictions of the model are quantitatively verified against the experimental data. It can be found based on the experimental data that the pool boiling heat transfer coefficient is enhanced as the salt concentration increases. Visualization studies and numerical data have shown that the presence and precipitation of salt leads to a decrease in the detachment diameter and growth time of the bubble and an increase in the frequency of detachment, thereby increasing the pool boiling heat transfer coefficient.
An Experimental Study on Flow Boiling Heat Transfer Outside Horizontal Enhanced Tubes
Authors: Ma Liangxiang , Zhang Jianghui , Ma Xiang , Gu Zongbao , He Yan , Kukulka David J. , Li Wei 
Published: September 2020

Abstract
A flow boiling heat transfer experimental investigation on the shell-side of a smooth tube and two enhanced tubes (C-EHT, P-EHT) was performed using R410A as working fluid. The outer surface of the C-EHT tube is covered with special fins having a salient height, and the inner surface has a thread structure with the same distribution density. The outer surface of the P-EHT tube has lots of tiny pits formed by high-strength sandblasting and smooth inner surface. The inlet and outlet vapor quality is 0.2 and 0.8 at a saturation temperature of 279K. The flow boiling experimental results show that the evaporation heat transfer coefficient of C-EHT tube is the largest among the tested tubes. However, for the P-EHT tube, its heat transfer coefficient is lower than that of smooth tube. C-EHT tube with special fins has higher heat transfer area, which can also intensify the interfacial turbulence with increasing fins. The reason why the flow boiling heat transfer coefficient of the P-EHT tube is lower than that of the smooth tube is that the diameter of the pit on P-EHT tube is too small to form the nucleation cites, which results in bubble retention under the condition of low mass flux and deteriorates the flow boiling heat transfer performance.