bluuebunny/crossref_metadata_2025 huggingface dataset:
Understanding Thermal Lagging Behaviors in Thermoelectric Elements With the Dual-Phase-Lag Model
Authors: Yeung Wing K. , Lam Tung T.
Published: November 2021

This study investigates the heat transport mechanism in semiconductor elements within a homogeneous thermoelectric cooling system using the dual-phase-lag (DPL) model. The thermal lagging behavior is analyzed and explored during the energy transport process. The coupled energy and constitutive partial differential equations are solved simultaneously to reduce the complexity of the high-order spatial and time derivatives. This approach simplifies the mathematical solution process and reduces numerical instabilities when compared to the conventional methodology in which either the temperature or heat flux is solved individually with a single equation. The effect of the thermal lagging behavior on energy transport is examined and compared to results by using the Cattaneo–Vernotte model. Furthermore, the phase-lag behavior on the temperature and heat flux profiles is investigated in detail. This study provides perceptive information for engineering applications in which the microscale heat transport phenomenon plays a significant role during the design process. Adding the dual-phase-lag model to the traditional heat diffusion model is a complementary option for engineers in the thermoelectric industry.
Modeling, Implementing, and Evaluating of an Advanced Dual Axis Heliostat Drive System
Authors: Hamanah W. M. , Salem A. S. , Abido M. A. , Al-Sulaiman F. A. , Qwbaiban A. M. , Habetler T. G.
Published: November 2021

Heliostat tracking is a critical component of the solar field of concentrating solar power tower (SPT) systems and can be the source of significant losses in power and profit when it lacks the necessary accuracy. This paper presents an advanced heliostat drive system for the SPT generation plant. An integrated model for the heliostat drive system based on dual axes tracking is proposed using an inexpensive angle sensor. The mathematical model of the integrated drive system is developed, including the solar, tower, and heliostat models. The matlab simulation model for the proposed integrated drive system is developed and evaluated. An experimental prototype for a dual-axis heliostat is built using Class-E direct current choppers and an inexpensive Gyro angle sensor. The prototype is tested and considered in the Dhahran region in Saudi Arabia under different operating conditions. A comparative study between simulation and experimental results is conducted to assess the efficacy and accuracy of the proposed controller drive system and validate the developed integrated model. Both simulation and experimental results demonstrate the effectiveness of the proposed dual-axis trackers to follow the sunbeams throughout the year.
Non-Uniform Porous Structures and Cycling Control for Optimized Fixed-Bed Solar Thermochemical Water Splitting
Authors: Dai Xiaoyu , Haussener Sophia
Published: November 2021

Solar thermochemical redox cycles provide a sustainable pathway for solar fuel processing. If done in porous (ceria) structures, they can profit from faster reaction rates owed to the enhanced heat and mass transport characteristics. However, the exact porous structure and operating conditions significantly affect the performance. We present a transient volume-averaged fixed-bed model of a thermochemical redox reactor utilizing macroporous ceria. We studied the porosity-dependent (ɛ = 0.4–0.9) and operating condition-dependent (solar concentration ratio, ratio of oxygen partial pressure to total pressure, and gas flowrate) performance of the fixed-bed ceria redox cycle. Structures with large porosity (ɛ = 0.9) showed better performance than low-porosity structures, owning to the enhanced heat absorption and resulting higher temperatures. We show that the cycle duration requires optimization according to the porosity of the structure. Two hours of operation for a structure with ɛ = 0.75 resulted in the largest hydrogen production (115.78mLgceria−1) if the single cycle duration was 240 s (i.e., 30 cycles in 2 h), while nearly five times less was produced for a 15 times longer single cycle duration (i.e., two cycles in 2 h). We subsequently introduced porous structures with different types of non-uniform porosity distributions. For an average porosity of ɛ = 0.75, the most favorable non-uniform porosity media exhibited higher porosity at the boundaries and a denser core. The fuel production of the best non-uniform porous structure was six times larger compared to a uniform porous structure. Adjusting on top of this the cycling conditions, a 14.6 times production gain was achieved. This work suggests that under non-isothermal operation condition for macroporous ceria redox fixed-bed cycling, non-uniform porous structure with higher porosity boundaries and a dense core benefit fuel production and porosity-dependent cycle duration modulation can be used to increase performance.
Wear Volume of Self-Mated Steel at the Submicron-Scale: An Atomic Force Microscopy Study
Authors: Reichelt Manuel , Cappella Brunero
Published: November 2021

Wear phenomena at the nanoscale are essential for applications involving miniaturized specimens. Furthermore, stochastic nano-events affect in general tribological processes, eventually also at the macroscale. Hence, it is of fundamental importance to perform nanotests with materials—such as steel—which are widely used also at the macroscale. In this paper, we present the analysis of tribotests performed with self-mated 100Cr6 steel (AISI 52100) at the submicron scale by means of an atomic force microscope. To this aim, steel particles with micrometer size were glued to the cantilever as “colloidal particles”. The microscope was employed for wear generation, for the imaging of scars and colloidal particles, and for the determination of wear volumes of both specimens. The analysis is focused on wear volume and its dependence on normal force and total sliding distance. Nanotests are compared with previously presented macrotests, also performed with self-mated steel. Nanotests exhibit, compared with macrotests, a significantly larger scattering and poor repeatability. Especially the analysis of these features reveals that, with small forces (≤10 µN) and surfaces (≤2 µm2), the random number of asperities inside the contact surface plays a crucial role, by far more decisive than the normal force or the sliding distance. Moreover, in several cases, only few asperities (<10) are involved in the wear process. Such low numbers lead to a breakdown in the applicability of tribological laws (e.g., Archard's law) based on statistical methods and on average variables.
Investigation of Oil–Air Flow and Temperature for High-Speed Ball Bearings by Combining Nonlinear Dynamic and Computational Fluid Dynamics Models
Authors: Deng Song , Zhao Guiqiang , Qian Dongsheng , Jiang Shaofeng , Hua Lin
Published: November 2021

An improved nonlinear dynamic model of high-speed ball bearings with elastohydrodynamic lubrication is adopted to predict the movements of balls and power loss of ball bearings for defining the boundary conditions of a computational fluid dynamics (CFD) model. Then, this method of combining nonlinear dynamic and CFD models is validated through the experimental verification. Subsequently, oil–air flow and temperature distribution inside the bearing chamber are studied at low and high speeds and light and heavy loads. The effect of nozzle’s position on the formation of oil film and heat dissipation is revealed under combined loads. The research results provide a theoretical basis for engineering application of high-speed rolling bearings.
Design and Performance Analysis of a Solar-Coal-Fired Complementary Power System Based on the S-CO2 Brayton Cycle
Authors: Zhou Yunlong , Bao Jiaxin , Yang Mei
Published: November 2021

To make solar energy conversion more effective and enable effective complementary utilization of multiple energy sources, two types of solar-coal-fired complementary power (SCCP) systems, which use the supercritical CO2 Brayton cycle, are investigated and their layouts are improved. In addition, a thermodynamic performance analysis is carried out. The results show that, as the amount of work done by the solar energy module increases, the coal saving rate increases linearly and proportionally in both SCCP systems. Also, the supplementary electric power generated by the solar field increases. The two improved layouts increase the net efficiency of the SCCP systems significantly (SCCP1: from 43.60% to 47.65%, SCCP2: from 43.60% to 47.67%). More specifically, the net efficiency of the improved layout for SCCP2 increases faster than that for SCCP1 (with its improved layout), when the second split ratio (SR2) exceeds 0.031. When the net efficiency remains unchanged, the SR2 for SCCP2 improved layout has a wide range. Furthermore, both the operation performance and operating mode conversion of the basic system are studied for varying sunlight conditions. The simulation results are consistent with the expectations, which underlines the development potential of the system to a certain extent.
Older adult recognition error patterns when listening to interrupted speech and speech in steady-state noise
Authors: Smith Kimberly G. , Fogerty Daniel
Published: November 2021

This study examined sentence recognition errors made by older adults in degraded listening conditions compared to a previous sample of younger adults. We examined speech recognition errors made by older normal-hearing adults who repeated sentences that were corrupted by steady-state noise (SSN) or periodically interrupted by noise to preserve 33%, 50%, or 66% of the sentence. Responses were transcribed and coded for the number and type of keyword errors. Errors increased with decreasing preservation of the sentence. Similar sentence recognition was observed between SSN and the greatest amount of interruption (33%). Errors were predominately at the word level rather than at the phoneme level and consisted of omission or substitution of keywords. Compared to younger listeners, older listeners made more total errors and omitted more whole words when speech was highly degraded. They also made more whole word substitutions when speech was more preserved. In addition, the semantic relatedness of the substitution errors to the sentence context varied according to the distortion condition, with greater context effects in SSN than interruption. Overall, older listeners made errors reflecting poorer speech representations. Error analyses provide a more detailed account of speech recognition by identifying changes in the type of errors made across listening conditions and listener groups.
Adaptive Responses of
Pseudomonas aeruginosa
to Treatment with Antibiotics
Authors: Wüllner Dominik , Gesper Maren , Haupt Annika , Liang Xiaofei , Zhou Pei , Dietze Pascal , Narberhaus Franz , Bandow Julia E.
Published: November 2021

Pseudomonas aeruginosa
is among the highest priority pathogens for drug development because of its resistance to antibiotics, extraordinary adaptability, and persistence. Antipseudomonal research is strongly encouraged to address the acute scarcity of innovative antimicrobial lead structures.
Cystoid macular oedema after descemet membrane endothelial keratoplasty
Authors: Guindolet Damien , Huynh Odile , Martin Gilles C , Disegni Hugo , Azar Georges , Cochereau Isabelle , Gabison Eric
Published: November 2021

Aims

To determine the incidence and risk factors of cystoid macular oedema (CMO) following descemet membrane endothelial keratoplasty (DMEK) with or without combined cataract surgery (triple-DMEK).

Methods

We reviewed the records of patients who underwent DMEK surgery alone or triple-DMEK performed at the Rothschild Foundation Hospital (Paris, France) between January 2019 and March 2020. Patients with pre-existing CMO observed on the preoperative macular optical coherence tomography (OCT) were excluded. Spectral-domain OCT was performed in patients with postoperative visual impairment. Data regarding comorbidities, intraoperative characteristics and postoperative treatments or complications were collected and analysed. Univariate and multivariate analyses were performed.

Results

Twenty three of 246 eyes (9.36%) developed clinically significant (cs)-CMO after DMEK. Triple-DMEK was not associated with a higher risk to develop CMO (12.2% in DMEK alone and 6.1% in triple-DMEK). Pseudophakic bullous keratopathy (PBK ; 39.1% vs 9%; OR=3.5 (1.0 to 11.8), p=0.045) and epiretinal membrane (ERM; 39.1% vs 7.7%; OR=10.5 (3.4 to 32.3), p<0.001) were more frequently observed in patients who developed CMO. The occurrence of hyphaema during surgery was statistically associated with postoperative CMO (13% vs 1.3%; OR=7.1 (1.0 to 48.8) p=0.045). Peroperative epithelial debridement was statistically associated with postoperative CMO (65.2% vs 33.2%, p=0.005), but only in univariate analysis.

Conclusions

We identified a clinically significant CMO incidence of 9.35% after DMEK. Patients with a history of ERM, PBK and intraoperative hyphaema may be at risk of developing CMO after DMEK surgery and should be monitored.
Asia-Pacific Consensus Statement on integrated 24-hour activity guidelines for children and adolescents
Authors: Loo Benny Kai Guo , Okely Anthony David , Pulungan Aman , Jalaludin Muhammad Yazid
Published: November 2021

Non-communicable diseases (NCDs) constitute a significant public health challenge and pose a great burden on health and social systems throughout the world. The Asia-Pacific region is in a vulnerable position as the prevalence of NCDs will inevitably increase with rapid socioeconomic transitions; yet it is ill prepared for this public health challenge as Asian children are among the most physically inactive in the world. Aligned with the WHO’s global strategy to control NCDs via preventive measures and health promotion policies, representatives from the Asia-Pacific region came together to develop consensus statement on integrated 24-hour activity guidelines for children and adolescents. These guidelines apply to children and adolescents, aged 5–18 years, in the Asia-Pacific region, regardless of gender, cultural background or socioeconomic status. These guidelines aim to provide the latest evidence-based recommendations, taking a holistic approach to lifestyle activities and adopting a practical perspective by framing these activities within a 24-hour period. Eating and dietary elements were incorporated as they closely influence the energy balance of the movement behaviours and vice versa. By investing in the younger generations through advocacy for healthier lifestyles, we aim to reduce the burden of NCDs in the Asia-Pacific region.
Influence of travel time and distance to the hospital of care on stillbirths: a retrospective facility-based cross-sectional study in Lagos, Nigeria
Authors: Banke-Thomas Aduragbemi , Avoka Cephas Ke-on , Gwacham-Anisiobi Uchenna , Benova Lenka
Published: November 2021

Introduction

Access to emergency obstetric care can lead to a 45%–75% reduction in stillbirths. However, before a pregnant woman can access this care, she needs to travel to a health facility. Our objective in this study was to assess the influence of distance and travel time to the actual hospital of care on stillbirth.

Methods

We conducted a retrospective cross-sectional study of pregnant women who presented with obstetric emergencies over a year across all 24 public hospitals in Lagos, Nigeria. Reviewing clinical records, we extracted sociodemographic, travel and obstetric data. Extracted travel data were exported to Google Maps, where typical distance and travel time for period-of-day they travelled were extracted. Multivariable logistic regression was conducted to determine the relative influence of distance and travel time on stillbirth.

Results

Of 3278 births, there were 408 stillbirths (12.5%). Women with livebirths travelled a median distance of 7.3 km (IQR 3.3–18.0) and over a median time of 24 min (IQR 12–51). Those with stillbirths travelled a median distance of 8.5 km (IQR 4.4–19.7) and over a median time of 30 min (IQR 16–60). Following adjustments, though no significant association with distance was found, odds of stillbirth were significantly higher for travel of 10–29 min (OR 2.25, 95% CI 1.40 to 3.63), 30–59 min (OR 2.30, 95% CI 1.22 to 4.34) and 60–119 min (OR 2.35, 95% CI 1.05 to 5.25). The adjusted OR of stillbirth was significantly lower following booking (OR 0.37, 95% CI 0.28 to 0.49), obstetric complications with mother (obstructed labour (OR 0.11, 95% CI 0.07 to 0.17) and haemorrhage (OR 0.30, 95%CI 0.20 to 0.46)). Odds were significantly higher with multiple gestations (OR 2.40, 95% CI 1.57 to 3.69) and referral (OR 1.55, 95% CI 1.13 to 2.12).

Conclusion

Travel time to a hospital was strongly associated with stillbirth. In addition to birth preparedness, efforts to get quality care quicker to women or women quicker to quality care will be critical for efforts to reduce stillbirths in a principally urban low-income and middle-income setting.
Early palliative/supportive care in acute myeloid leukaemia allows low aggression end-of-life interventions: observational outpatient study
Authors: Potenza Leonardo , Scaravaglio Miki , Fortuna Daniela , Giusti Davide , Colaci Elisabetta , Pioli Valeria , Morselli Monica , Forghieri Fabio , Bettelli Francesca , Messerotti Andrea , Catellani Hillary , Gilioli Andrea , Marasca Roberto , Borelli Eleonora , Bigi Sarah , Longo Giuseppe , Banchelli Federico , D'Amico Roberto , L Back Anthony , Efficace Fabio , Bruera Eduardo , Luppi Mario , Bandieri Elena
Published: November 2021

Objectives

Early palliative supportive care has been associated with many advantages in patients with advanced cancer. However, this model is underutilised in patients with haematological malignancies. We investigated the presence and described the frequency of quality indicators for palliative care and end-of-life care in a cohort of patients with acute myeloid leukaemia receiving early palliative supportive care.

Methods

This is an observational, retrospective study based on 215 patients consecutively enrolled at a haematology early palliative supportive care clinic in Modena, Italy. Comprehensive hospital chart reviews were performed to abstract the presence of well-established quality indicators for palliative care and for aggressiveness of care near the end of life.

Results

131 patients received a full early palliative supportive care intervention. All patients had at least one and 67 (51%) patients had four or more quality indicators for palliative care. Only 2.7% of them received chemotherapy in the last 14 days of life. None underwent intubation or cardiopulmonary resuscitation and was admitted to intensive care unit during the last month of life. Only 4% had either multiple hospitalisations or two or more emergency department access. Approximately half of them died at home or in a hospice. More than 40% did not receive transfusions within 7 days of death. The remaining 84 patients, considered late referrals to palliative care, demonstrated sensibly lower frequencies of the same indicators.

Conclusions

Patients with acute myeloid leukaemia receiving early palliative supportive care demonstrated high frequency of quality indicators for palliative care and low rates of treatment aggressiveness at the end of life.
Deep Learning-Based Classification of Malignant and Benign Cells in Dermatoscopic Images via Transfer Learning Approach
Authors: Kumar V. Akash , Mishra Vijaya , Arora Monika
Published: November 2021

The inhibition of healthy cells creating improper controlling process of the human body system indicates the occurrence of growth of cancerous cells. The cluster of such cells leads to the development of tumor. The observation of this type of abnormal skin pigmentation is done using an effective tool called Dermoscopy. However, these dermatoscopic images possess a great challenge for diagnosis. Considering the characteristics of dermatoscopic images, transfer learning is an appropriate approach of automatically classifying the images based on the respective categories. An automatic identification of skin cancer not only saves human life but also helps in detecting its growth at an earlier stage which saves medical practitioner’s effort and time. A newly predicted model has been proposed for classifying the skin cancer as benign or malignant by DCNN with transfer learning and its pre-trained models such as VGG 16, VGG 19, ResNet 50, ResNet 101, and Inception V3. The proposed methodology aims at examining the efficiency of pre-trained models and transfer learning approach for the classification tasks and opens new dimensions of research in the field of medicines using imaging technique which can be implementable in real-time applications.
Ideal-Based k-Zero-Divisor Hypergraph of Commutative Rings
Authors: Selvakumar K. , Subajini M.
Published: November 2021

Let [Formula: see text] be a commutative ring, [Formula: see text] an ideal of [Formula: see text] and [Formula: see text] a fixed integer. The ideal-based [Formula: see text]-zero-divisor hypergraph [Formula: see text] of [Formula: see text] has vertex set [Formula: see text], the set of all ideal-based [Formula: see text]-zero-divisors of [Formula: see text], and for distinct elements [Formula: see text] in [Formula: see text], the set [Formula: see text] is an edge in [Formula: see text] if and only if [Formula: see text] and the product of the elements of any [Formula: see text]-subset of [Formula: see text] is not in [Formula: see text]. In this paper, we show that [Formula: see text] is connected with diameter at most 4 provided that [Formula: see text] for all ideal-based 3-zero-divisor hypergraphs. Moreover, we find the chromatic number of [Formula: see text] when [Formula: see text] is a product of finite fields. Finally, we find some necessary conditions for a finite ring [Formula: see text] and a nonzero ideal [Formula: see text] of [Formula: see text] to have [Formula: see text] planar.
Heteroatoms-Doped Hierarchical Porous Carbon Materials Based on Biomass-Metal Ternary Complex for Supercapacitor
Authors: Wang He , Wu Shumeng , Fan Bingbing , Liu Xiaoqiang , Nie Yamin , Zhou Yanmei
Published: November 2021

Engineering large active surface area, fast ion transfer, and wide work voltage are indispensable for using porous carbon as an electrode material for high energy density and high rate capability supercapacitors. Here, a method is proposed to fabricate N/O/P/S heteroatom co-doped hierarchical porous carbon materials via zinc carbonate hydroxide ([ZnCO3]2∙[Zn(OH)2]3) assisted activation of the biomass-based ternary complex. By adjusting the pH of the ternary complex and the mass ratio of [ZnCO3]2∙[Zn(OH)2]3, it is demonstrated that TCPC-7-0.5 with high specific surface area (1360 m2 g−1), appropriate micropore surface area (672 m2 g−1), and micropore volume (0.3 cm3 g−1) possesses excellent electrochemical performance. The unique pore structure accelerates the transport of electrolyte ions and provides more effective active sites for their adsorption. As a result, as an electrode material for supercapacitors, it maintains excellent frequency response at a larger scan rate of 1 V s−1. The working voltage range of the assembled symmetrical supercapacitor TCPC-7-0.5//TCPC-7-0.5 in 6 M KOH electrolyte can be effectively expanded to 1.2 V. Most importantly, it can simultaneously achieve an energy density of 7.01 W h kg−1 at a high-power density of 15 kW kg−1.
Computed Tomography Image Features under Convolutional Neural Network Algorithm in Analysis of Inflammatory Factor Level and Prognosis of Patients with Hepatitis B Virus-Associated Acute-on-Chronic Liver Failure
Authors: Xie Zhibing , Ding Li , Li Yongzhong
Published: November 2021

This study aimed to explore the application value of three-dimensional (3D) convolutional neural networks (3D-CNN)-based computed tomography (CT) image intelligent segmentation model in the identification of lesions of patients with hepatitis B virus-associated acute-on-chronic liver failure (HBV-ACLF). A total of 30 patients with HBV-ACLF, 30 patients with chronic HBV hospitalized in hospital, and 30 healthy volunteers were selected as subjects. Liver function and serum inflammatory factors were measured in each group, and the 3D-CNN algorithm model was applied to CT imaging. The results showed that the levels of interleukin (IL)-6, IL-26, and IL-37 in the HBV-ACLF group were the highest, which were 128.43 ± 45.16 pg/mL, 1237.47 ± 536.22 pg/mL, and 50.83 ± 7.62 pg/mL, respectively. Total bilirubin (TBIL) (

P
=
0.035

) and IL-26 (

P
=
0.013

) were independent predictors that affected the prognosis of HBV-ACLF patients. The results of lesion segmentation showed that the Dice coefficient of 3D-CNN low-density focus and enhanced focus segmentation was the highest (0.821 ± 0.07 and 0.773 ± 0.071), and the marked area was close to the area manually drawn by the doctor. 3D CNN was superior to other algorithms in the number of nodular lesions detected (533), sensitivity (97.5%), and missed detection rate (0.52%) (

P
<
0.05

). In short, IL-26 may become a useful biomarker in the treatment of HBV-ACLF. The 3D-CNN model improved the segmentation performance of lesions in CT images of HBV-ACLF patients, which provided a reference for the diagnosis and prognosis of HBV-ACLF.
Epidemiological Characteristics of Inpatients Undergoing Surgery for Glaucoma at Tianjin Eye Hospital from 2013 to 2017
Authors: Yang Jin , Qu Yue , Li Boai , Zhong Zelong , Shi Liukun , Tian Xiaofeng , Wang Rui , Xu Dan , Liu Yufeng
Published: November 2021

Purpose. To analyze the epidemiological characteristics of inpatients who underwent surgery for glaucoma at Tianjin Eye Hospital from 2013 to 2017. Methods. All glaucoma inpatients who underwent surgery at Tianjin Eye Hospital from 2013 to 2017 were evaluated. The relationships of age and sex with different types of glaucoma were analyzed. The differences in the prevalence and family history of glaucoma among patients with different systemic diseases were compared. Additionally, the effects of different surgical methods for primary angle-closure glaucoma (PACG) and primary open-angle glaucoma (POAG) were compared. Results. A total of 4539 patients with glaucoma were retrospectively analyzed. The most prevalent type was PACG (60.15%), followed by secondary glaucoma (SG, 25.53%), POAG (7.6%), uncontrollable intraocular pressure (IOP) after antiglaucoma surgery (4.71%), mixed glaucoma (MG, 10%), and congenital glaucoma (CG, 0.9%). The main surgical methods were phacoemulsification (phaco), phacotrabeculectomy (phaco-trab), and trabeculectomy (trab). The rate of phaco-trab increased, while that of trab decreased. The proportion of women in the PACG group was higher than those in the POAG and SG groups, and there was a pronounced tendency for family clustering (

P
<
0.001

), while in the POAG and SG groups, the proportions of men and those with diabetes were higher (

P
<
0.05

). Conclusions. In Tianjin Eye Hospital from 2013 to 2017, the main type of glaucoma was PACG. Female sex and a family history of glaucoma were risk factors for PACG, while male sex and hyperglycemia were risk factors for POAG and SG. Among the antiglaucoma surgery methods, the proportion of phaco-trab increased, while the proportion of trab decreased.
A Hybrid Model of Extreme Learning Machine Based on Bat and Cuckoo Search Algorithm for Regression and Multiclass Classification
Authors: Fan Qinwei , Fan Tongke
Published: November 2021

Extreme learning machine (ELM), as a new simple feedforward neural network learning algorithm, has been extensively used in practical applications because of its good generalization performance and fast learning speed. However, the standard ELM requires more hidden nodes in the application due to the random assignment of hidden layer parameters, which in turn has disadvantages such as poorly hidden layer sparsity, low adjustment ability, and complex network structure. In this paper, we propose a hybrid ELM algorithm based on the bat and cuckoo search algorithm to optimize the input weight and threshold of the ELM algorithm. We test the numerical experimental performance of function approximation and classification problems under a few benchmark datasets; simulation results show that the proposed algorithm can obtain significantly better prediction accuracy compared to similar algorithms.
Intelligent Tea-Picking System Based on Active Computer Vision and Internet of Things
Authors: Zhang Jing , Li Zhaochun
Published: November 2021

Intelligent farming machines are becoming a new trend in modern agriculture. The intelligence and automation allow planting to become data-driven, leading to more timely and cost-effective production and management of farms and improving the quality and output of farm products. This paper presents a proposal for developing a type of intelligent tea picking machine based on active computer vision and Internet of Things (IoT) techniques. The intelligent tea picking machine possesses an active vision system for new tip positioning and can automatically implement tea picking operation in the natural environment. The active vision system provided with a cross-light path of projection and camera is designed according to the actual characteristics of picking surface, where new tips can be recognized by referring to the color factor and their height information is easily acquired by fringe projection profilometry. Furthermore, the machine attaches wireless communication equipment to transmit the real-time status of the tea picking process to an intermediary platform and eventually to the Internet for extensive data analysis. The data such as color factor and quantity of new tips collected through IoT can be used for different quality and production evaluations. The focus of this paper can promote the automation and intelligence of tea pickers and agricultural machinery.
Hydrogeology Response to the Coordinated Mining of Coal and Uranium: A Transparent Physical Experiment
Authors: Zhang Tong , He Xiang , Zhang Kai , Wang Xiaohan , Liu Yang
Published: November 2021

The migration of fracture and leaching solute caused by mining activity is critical to the hydrogeology. To characterize liquid and solid migration in a mining area of intergrown resources, the coordinated mining of coal and uranium was considered, and a physical experiment based on transparent soil was conducted. A well experimental performance of transparent soil composed of paraffin oil, n-tridecane, and silica gel and the leaching solution comprised of saturated oil red O dye was observed for hydrogeology characterization. An “arch-shaped” fracture zone with a maximum height of 90 m above the mined goaf and a “horizontal-shaped” fracture zone with a fractured depth of 9.97–16.09 m in the uranium-bearing layer were observed. The vertical leachate infiltration of 4.83 m was observed in the scenario of uranium mining prior to coal, which is smaller than those in the scenarios of comining of coal and uranium (10.26 m) and coal mining prior to uranium (16.09 m). A slight strata movement below the uranium was observed, and the leaching solution infiltration in the coal mining area was not observed in a short period in the scenario of uranium mining prior to coal; both of those was presented in the scenarios of comining of coal and uranium and coal mining prior to uranium.
A Case of Severe Fioricet Withdrawal Presenting During Admission to an Inpatient Psychiatric Unit
Authors: Rodulfo Alejandro , Augsten Alberto , Wainwright Erin , Abramovici Gil
Published: November 2021

Background. Butalbital-containing combination (BCC) analgesics have the potential for the development of tolerance and dependence. Misuse and withdrawal of these agents should be considered in patients presenting with new-onset psychosis. This case highlights how butalbital withdrawal may be missed in the emergency department setting and underscores how early identification may affect management and prognosis. Case Presentation. A 40-year-old female with a history of migraine, depression, and anxiety presented to the emergency department (ED) with new-onset psychosis following a recent seizure-like episode. At home, the patient was prescribed butalbital-acetaminophen-caffeine (Fioricet), duloxetine, alprazolam, and zolpidem for these conditions. On arrival to the ED, the patient was disoriented and appeared to be responding to internal stimuli. Following initial medical evaluation, the patient was cleared for further psychiatric assessment, during which she developed acute-onset autonomic instability while waiting for a bed on the inpatient psychiatric unit. She then became agitated, requiring multiple emergency medications, and eventually required emergent intubation and was admitted to the intensive care unit (ICU). Following extubation, a psychiatric consultation was performed. On assessment, the patient was alert and oriented and no longer exhibited psychotic symptoms. She admitted to using butalbital-acetaminophen-caffeine (Fioricet) daily for the past 10 years and had recently run out of her prescribed medication. She acknowledged that she was taking more than prescribed and requested substance use treatment resources, for which she was subsequently discharged to an inpatient drug rehabilitation facility. Conclusions. Given the time constraints inherent to the ED setting, a complete substance use history (both illicit and prescribed) may be challenging to obtain. However, it remains critical for providers to identify patients at risk for life-threatening withdrawal from sedative, hypnotics, and anxiolytic agents.
Synergistic Antibiofilm Efficacy of Thymol and Piperine in Combination with Three Aminoglycoside Antibiotics against Klebsiella pneumoniae Biofilms
Authors: Bisso Ndezo Borel , Tokam Kuaté Christian Ramsès , Dzoyem Jean Paul
Published: November 2021

Background. Thymol and piperine are two naturally occurring bioactive compounds with several pharmacological activities. In this study, their antibiofilm potential either alone or in combination with three aminoglycoside antibiotics was evaluated against a biofilm of Klebsiella pneumoniae. Methods. Determination of antimicrobial susceptibility was performed using the broth microdilution method. Biofilm formation was evaluated by the microtiter plate method. Antibiofilm activity was determined using 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2H-tetrazolium-bromide (MTT) assay. The combination studies were performed by the checkerboard microdilution method. Results. The minimum biofilm inhibitory concentration (MBIC) of streptomycin was reduced by 16- to 64-fold when used in combination with thymol, while the MBIC of kanamycin was reduced by 4-fold when combined with piperine. The minimum biofilm eradication concentration (MBEC) values of streptomycin, amikacin, and kanamycin were, respectively, 16- to 128-fold, 4- to 128-fold, and 8- to 256-fold higher than the planktonic minimum inhibitory concentration (MIC). Thymol combined with streptomycin or kanamycin showed synergic effects against the preformed biofilm with 16- to 64-fold reduction in the minimum biofilm eradication concentration values of each antibiotic in combination. Piperine acted also synergically with kanamycin with an 8- to 16-fold reduction in the minimum biofilm eradication concentration values of kanamycin in combination. Conclusion. The association of thymol with antibiotics showed a strong synergistic effect both in the inhibition of biofilm formation and the destruction of the preformed biofilm of K. pneumoniae. This study suggests that a combination of thymol with streptomycin, amikacin, or kanamycin could be a promising alternative therapy to overcome the problem of K. pneumoniae biofilm-associated infections.
Optimization of Wireless Sensor Network Architecture with Security System
Authors: Wang Shanshan , Chen Yun
Published: November 2021

Wireless sensor network (WSN) is a new type of wireless network. It has many advantages, but there are some problems. These problems make it easier for attackers to analyze network security holes and attack and destroy entire networks. This article designs a security wireless sensor network model. It can resist most known network attacks without significantly reducing the energy power of sensor nodes. First, we cluster the network organization to reduce energy consumption. It also protects the network based on the calculation of trust levels and the establishment of trust relationships between trusted nodes and operates the trust management system based on a centralized method, secondly, on the basis of LEACH agreement, draws lessons from the principle of biological immune system, optimizes the wireless sensor network, and further proposes a new immune system structure suitable for wireless sensor networks. The experimental results show that the wireless sensor network model designed in this paper solves the high‐efficiency and energy‐saving design task, and the trust management system has satisfactory results in defending against attacks.
Effect of Nonionizing Radiation on Progesterone Treatment in Endometrial Hyperplasia: An Experimental Rat Study
Authors: Unsal Mehmet , Fadiloglu Erdem , Celik Burcin , Kilic Fatih , Tapisiz Omer Lutfi
Published: November 2021

Objectives: The aim of the study was to evaluate the negative effect of nonionizing radiation on the treatment of endometrial hyperplasia (EH) with oral progesterone. Design: Forty oophorectomized Wistar Albino female rats were included in this experimental rat study. Materials and Methods: The 4 groups were planned as follows: Group A; sham group; Group B; group receiving oral estradiol hemihydrate 4 mg/kg/day; Group C; 4 mg/kg/day oral estradiol hemihydrate followed with 1 mg/day medroxy progesterone acetate (MPA) and Group D; 4 mg/kg/day oral estradiol hemihydrate followed with 1 mg/day MPA with exposure to nonionizing radiation at 1800 mHz/3 h/day. After the experimental model, uterine horns were sampled and the preparations were evaluated for pathological parameters (glandular density, epithelial cell length, and luminal epithelial cell length) via light microscopy. Nonionizing radiation was created by a signal generator and a compatible mobile phone. Results: Estrogen was found to increase all parameters related to EH (p < 0.05). Progesterone treatment was found to decrease parameters related to EH (Group B vs. C; luminal epithelial cell length, glandular density, and epithelial length; 11.2 vs. 13.2 μm p = 0.007; 32.5 vs. 35.5, p = 0.068; and 219.9 μm vs. 285 µm, p < 0.001, respectively). Final analyses revealed reduced effectiveness of progesterone treatment in the rats exposed to nonionizing radiation (Group C vs. D); luminal epithelial cell length, glandular density, and epithelial length (11.2 μm vs. 13.5 μm, p = 0.179; 32.5 vs. 52, p < 0.001; and 219.9 μm vs. 374.1 μm, p = 0.001, respectively). Limitations: The limitations of our study are that the results of animal experiments may not be appropriate for direct adaptation to humans and the relatively low number of rats included in the study. Conclusion: Nonionizing radiation reduces the effect of progesterone in patients receiving treatment for EH.
Short- and Medium-Term Impact of a Structured Medical Intervention in Adolescents with Overweight, Obesity, or Increased Waist Circumference
Authors: Macieira Luisa , Saraiva Jorge , da Conceição dos Santos Lélita
Published: November 2021

Introduction and Objectives: This study aimed to assess the impact of a structured medical intervention in adolescents with overweight or obesity at medical discharge and after 5 years and identify the factors responsible for the reappearance of anthropometric alterations. Methods: A total of 42 adolescents with overweight, obesity, and/or increased waist circumference (WC) participated in a survey on eating habits, physical exercise, and sedentary habits. Body mass index (BMI), fat mass (FM), and WC were evaluated quarterly during a structured medical intervention, with a maximum duration of 3 years (2007–2010) and 5 years after its conclusion (2015–2016). SPSS 19.0®was used for statistical analysis. Results: Initially, 23.8% adolescents were overweight, 28.6% were obese, 83.3% had increased FM, and 95.2% had high WC. A significant improvement was noted until medical discharge with respect to BMI, FM, and WC (p < 0.001) owing to an increased number of meals; reduction in the consumption of hypercaloric foods/drinks (p < 0.001); increase in the consumption of fruits, vegetables, and soup (p < 0.001); increase in physical exercise and daily walks (p < 0.001); and reduction in sedentary habits (p < 0.001). At reassessment, after 5 years, the majority had normal BMI, FM, and WC (p < 0.001), although 45.2% had abandoned sports (p < 0.001). Conclusions: A relation exists between the improvement or normalization of BMI, FM, and WC and the number of meals, healthy eating habits, physical exercise, and less sedentary habits. The intervention was associated with an improvement in the parameters during the short and medium terms.
Myxedema Psychosis after Levothyroxine Withdrawal in Radioactive Iodine Treatment of Differentiated Thyroid Cancer: A Case Report
Authors: Pattaravimonporn Nutnicha , Chaikijurajai Thanat , Chamroonrat Wichana , Sriphrapradang Chutintorn
Published: November 2021

Neuropsychiatric symptoms, especially acute psychosis (often referred to as myxedema madness or psychosis), are rare but possible clinical presentations of patients with hypothyroidism. A 42-year-old woman with papillary thyroid carcinoma and recent total thyroidectomy had developed flat affect, paranoid delusion, and visual and auditory hallucination during inpatient admission for elective radioactive iodine treatment. On admission, her history and physical exam did not reveal symptoms and signs of significant hypothyroidism. Other medical causes of acute psychosis were excluded, and the patient was immediately treated with thyroid hormone replacement therapy. Subsequently, her thyroid function normalized, and her psychotic symptoms gradually improved. Although there is a lack of classic signs and symptoms of hypothyroidism, myxedema madness should be recognized as one of the potentially treatable causes of acute psychosis.
The Role of Dividend Policy in Inventing the Effect of Accounting Profit, Cash Flow, Operation and Corporate Size on the Price of Closing Stock
Authors: Awaluddin Murtiadi , Setijawan Febriani , Susi Wardhani Rulyanti , Rahman Muh. Akil
Published: November 2021

This study aims to determine the effect of accounting profit, operating cash flow and company size on the closing price of shares through dividend policy on consumer goods industry companies on the Indonesia Stock Exchange. This research uses quantitative methods and types of explanatory research, with 2016-2018 observation years in 17 company samples. The results showed (1) Accounting profit and operating cash flow had a positive and significant effect on dividend policy, while the size of the company had no influence on dividend policy. (2) Accounting profit and operating cash flow have no effect on the closing price of shares, while the size of the company has a positive and significant effect on the closing price of shares. (3) Dividend policy has a positive and significant effect on the closing price of shares. (4) There is no indirect effect of dividend policy in mediating accounting profit and operating cash flow on the closing price of shares, but there is an indirect effect of dividend policy in mediating company size on the closing price of shares
Influence of Capital, Labor and Wage Levels on Production of Super Tofu Padang
Authors: Sutra Riani , Ananda Febryandhie
Published: November 2021

The purpose of this study was to determine the effect of capital, labor, and wage levels on company production. The research method uses quantitative descriptive with 36 samples from January 2016 until December 2018. Based on the partial t test it can be concluded that capital has a negative and significant effect on production. Based on the partial t test it can be concluded that the variable of labor does not affect production. Based on the partial t test it can be concluded that the wage level variable has positive and significant effect on production. Based on the simultaneous F test it can be said that capital, labor, and wage levels together affect production. The ability of the independent variable in explaining the dependent variable was 77.40%, while the remaining 22.60% was influenced by other variables apart from the variables studied
Effect of Physical Fitness, and Self-Concept on the Performance of Teachers of Physical Education in Ambon City
Authors: Divinubun Siti
Published: November 2021

Introduction: This study aim at determining the effect of Physical fitness, self-concept and sports motivation on performance of teacher elementary school. Method: The research used quantitative approach with survey method and path analysis applied in testing hypothesis. The research was conducted at Ambon City with a sample of 50 teachers physical education elementary school selected through random sampling. Data analysis technique is an analysis regression (ANAVA) with F test and t-test at a significance level of α = 0.05, and path analysis. Results: The results of this study indicate that: (1) there is positive direct effect of physical fitness on performance of teachers in the amount of 0.326, (2) there is positive direct effect of self-concept on performance of teachers in the amount of 0.333, (3) there is positive direct effect of self-concept on performance of teachers in the amount of 0.355, (4) there is positive direct effect of physical fitness on self-concept in the amount of 0.318, (5) there is positive direct effect of on self-concept in the amount of 0.307. Conclusion: The conclusion showed that physical fitness, self-concept and sports motivation are important determinants to decrease the performance of teachers on physical education at elementary school of Ambon City.
Study of Mouse Deer and Snail Characters in Fable (Deconstruction Approach)
Authors: Izhar Izhar
Published: November 2021

ABSTRACT

The presence of the mouse deer and snail fable is considered to contribute in education field. The character of the mouse deer with its strengths and the snail with its weaknesses brings its own spirit to the reader that the irrationality of the weak can defeat the strong is acceptable logic. Thus, the strong mouse deer is judged as a loser and the weak snail is judged as a hero by the readers. In fact, in a certain sense, the meaning of an event conveyed through the characters of the story can be inversely to the reader's interpretation so far. The objectives of this study were (1) to describe the characters of the mouse deer and snail in deconstruction studies; and (2) to describe the relevance of deconstruction studies with critical thinking activities in the independent learning era. The research was a descriptive qualitative research based on research studies using Derrida's deconstruction. Data analysis was carried out in stages, namely: reading repeated texts carefully so that the original context and reception context were found, tracing binary opposition, and presenting other logic or other perceptions. The results of the study shows that (1) the snail character who has been predicted to be a good character can be considered an arrogant and fraudulent character. Meanwhile, the mouse deer figure who has been regarded as an arrogant figure can be considered an honest and kind character, and (2) the deconstruction study method is relevant to critical thinking activities in the independent learning era.