bluuebunny/crossref_metadata_2025 huggingface dataset:
Oxidised Biochar from Palm Kernel Shell for Eco-friendly Pollution Management
Authors: Amin Sylbialin , Bachmann Robert Thomas , Yong Soon Kong
Published: August 2020

Oil palm plantations produce palm kernel shell (PKS) that can be converted into biochar for environment-friendly soil remediation and water treatment. Oxidation with hydrogen peroxide (H2O2) may enhance surface characteristics and the quality of low-rank PKS biochar as a sorbent for environmental decontamination. This study aims to determine the effect of oxidation on the surface characteristics (i.e., specific surface area, surface charge, and chemical properties) of PKS biochar, and compared with that of PKS activated carbon. The surface area for the oxidised PKS biochar was similar to that of PKS biochar, indicating that oxidation did not remove the pore blocking material from the surface area of the PKS biochar. However, oxidation has increased the amount of negatively charged oxygen functional groups in PKS biochar, as indicated by the analyses of the Fourier transform infrared spectroscopy (FTIR) and cation exchange capacity (CEC). The CEC value of raw and activated PKS biochar were similar and 4.6 and 2.6 times lower for PKS biochar and oxidised PKS biochar, respectively. Oxidation caused enlargement of pores on PKS biochar and caused a reduction of specific surface area. More research is required to establish the process conditions to create a greater surface area and sorption capacity.
Optimization of Natural Colour Extraction from Dragon Fruit (Hylocereus polyrhizus) Peel
Authors: Sambasevam Kavirajaa Pandian , Yunos Norfateha , Mohd Rashid Hasaratul Nadiah , Baharin Siti Nor Atika , Suhaimi Nur Farahin , Raoov Muggundha , Shahabuddin Syed
Published: August 2020

Dragon fruit (Hylocereus polyrhizus) which comes from family of Cactaceae is one of the tropical fruit in Malaysia. The peels of red dragon fruit are the possible sources of betacyanin, which responsible for the red-violet color even though the peel always regarded as a waste. The objective of this study is to assess the stability of natural pigment extract from dragon fruits peels by using simple water extraction method and assessed by ultraviolet-visible (UV-Vis) spectrometer. The extracted natural pigments then were introduced to several optimization conditions such as extraction time (1 – 6 hours), temperature (25 – 100 °C) and a range of pH (2 – 12). This study was also investigated the stability of natural pigment towards light. Results analysis of dragon fruit peels extracted shown that the optimum conditions were 4 hours of extraction time, 25 °C and pH 5. Sample extraction of natural pigment that has been optimized was more stable compare to control when exposed to light. In addition, the natural pigment extracted from dragon fruit peel was characterized by Fourier transform infrared (FTIR) spectrometer. In conclusion, the natural pigment extracted by using solvent extraction method from dragon fruit peels has ability to be used as natural colorant.
Influence of Thermoplastic PEG, GLY and Zein in PCL/TZ and HAp Bio Composite via Solid State Supercritical CO2 Foaming
Authors: Subuki Istikamah , Akhbar Suffiyana , Nor Wahid Farrah Khalidah
Published: August 2020

This study is aimed to investigate the characteristics of the composite containing blended poly (ɛ-caprolactone) (PCL), hydroxyapatite (HA) and thermoplastic zein (TZ). Thermoplastic zein was developed by mixing zein with glycerol (GLY) and polyethylene glycol (PEG). The thermal characterization of mixed TZ and bio composite was characterized in order to investigate the characterization of PCL/TZ/HA composites. The bio composited was then moulded and produce porous structure via solid state supercritical carbon dioxide (scCO2) foaming process. The specimen was saturated with CO2 for 6 hours at 50˚C and saturation pressure of 20MPa at high depressurization rate. The morphology of porous specimen produced were characterized by scanning electron microscopy (SEM). The results indicated that after polymer saturation with CO2, high depressurization causes the formation of nucleated gas cells that give rise to pores within the foamed specimens. The blended bio composite with composition of PCL60/TZ20/HAp20 exhibit well interconnected porous structure compared to other bio composite prepared. The foaming effect produce foams with heterogeneous morphologies on bio composite material at relatively low temperature.
Desafios para a adaptação da infraestrutura de drenagem urbana em cenário de mudança do clima no Recife-PE
Authors: Silva Junior Marcos Antonio Barbosa da , Cabral Jaime Joaquim da Silva Pereira , Fonseca Neto Gastão Cerquinha da , Silva Pedro Oliveira da , Guerra Carlos Maurício Fonseca , Silva Simone Rosa da
Published: August 2020

Os efeitos do clima em mudança podem provocar impactos significativos no sistema de drenagem dos centros urbanos. Tal situação fica ainda mais agravada nas planícies urbanas costeiras, como a cidade do Recife-PE, que tem urbanização desordenada, pluviosidade elevada e um sistema de drenagem bastante vulnerável à variabilidade diária das marés. Nesse contexto, este estudo discute os desafios para a adaptação da infraestrutura de drenagem urbana da cidade, visando o enfrentamento às mudanças do clima. Para isso, realizou-se uma revisão de literatura que resultou no diagnóstico expedito focando: as problemáticas e peculiaridades da drenagem local; os efeitos da mudança do clima no sistema de drenagem da cidade, destacando as vulnerabilidades atuais e futuras; e as iniciativas para a mitigação dos impactos e a adaptação da infraestrutura.
Avaliação microbiológica das técnicas de higienização empregadas em óculos 3D, reutilizáveis em cinemas de Salvador, Bahia
Authors: Silva Maiana Souza , Ferreira Rodrigo Almeida , Feitosa Caroline Alves , Santana Sidney Carlos de Jesus , Félix Edson Ruy da Silva
Published: August 2020

Introdução: Os novos sistemas de projeção 3D em cinemas trouxeram adequações aos óculos, passando a ser reutilizáveis e não mais descartáveis. Assim, surgiram questionamentos a respeito de possíveis infecções cruzadas a partir dessa reutilização. Apesar da obrigatoriedade legal da higienização dos óculos, esta é deixada a critério dos próprios cinemas. Objetivo: Esse artigo tem como objetivo avaliar a efetividade da higienização empregada em óculos 3D de cinemas em Salvador, Bahia. Metodologia: As coletas das amostras para análises microbiológicas foram realizadas em óculos 3D não higienizados e higienizados, considerando as formas de higienização empregada nestes (manual e automatizada), sendo analisadas bactérias Gram negativas e Gram positivas, além de coliformes termotolerantes. Resultados: Foram identificados 12 microrganismos dentre as amostras analisadas. Foi observada diferença significativa na frequência de bactérias entre óculos higienizados e não higienizados, porém não houve diferença significativa quanto ao método de higienização. Discussão: as bactérias mais frequentemente encontradas fazem parte da microbiota da superfície ocular, porém em determinadas condições podem se tornar patogênicas oferecendo riscos ao seu hospedeiro. Conclusão: o microrganismo mais frequente nos óculos 3D é Staphylococcus coagulase negativo; a higienização apresenta redução significante na frequência de microrganismos, seja por método manual ou automatizado.
Palavras-chave: Óculos. Cinema. Higienização. Contaminação. Bactérias.
Aspectos ecológicos da febre maculosa no Brasil
Authors: Rodrigues Claudio Manuel , Geise Lena , Gazeta Gilberto Salles , Oliveira Stefan Vilges de
Published: August 2020

Introdução: A febre maculosa é uma doença febril aguda causada por agentes bacterianos do gênero Rickettsia, transmitida aos seres humanos principalmente por carrapatos e considerada reemergente no sudeste brasileiro a partir dos anos 1980 por diversos fatores ecológicos. Objetivo: Apresentar o estado da arte sobre as interações ecológicas relacionadas aos ciclos enzoóticos e ao transbordamento zoonótico relacionados à doença no Brasil. Metodologia: Revisão crítica e pormenorizada da literatura a respeito da doença publicada e indexada a Bireme/BVS até o ano de 2017. Resultados: Dentre outros, demonstrou-se a preocupação crescente dos pesquisadores para com a domiciliação da doença através do contato de animais domésticos com carrapatos infectados em ecótonos e áreas de recente urbanização. Conclusão: Modificações recentes dos padrões de uso e ocupação do solo podem influenciar a dinâmica populacional de determinadas espécies de carrapatos, sendo necessárias atividades de pesquisa que busquem caracterizar os agentes riquetsiais, principalmente em regiões ainda consideradas epidemiologicamente silenciosas. É necessária a organização de uma rede nacional de vigilância de ambientes que operacionalize as atividades de investigação e os processos de vigilância voltada para esta e as demais doenças transmitidas por artrópodes vetores ápteros no país.
Palavras-chaves: Febre Maculosa. Rickettsia. Carrapatos. Zoonoses. Ecologia.
Relationship between extreme obesity and mortality in patients with reduced ejection fraction
Authors: Siegel Robert M. , Ostfeld Robert J. , Aboodi Michael S. , Vittorio Timothy J. , Mehlman Yonatan , Travin Mark I.
Published: August 2020

Aims

Although obesity is associated with increased mortality, epidemiologic studies in heart failure have reported lower mortality in obese patients compared with matched nonobese patients (the ‘obesity paradox’). However, the relationship between survival and extreme (morbid) obesity (BMI ≥ 40) is poorly understood. We evaluate survival in low ejection fraction patients across a range of BMI categories, including extreme obesity.

Methods

In a retrospective review, 12 181 consecutive patients receiving nuclear stress testing at a tertiary care center were stratified based on BMI and ejection fraction. Eight-year mortality data were collected using the social security death index.

Results

Normal ejection fraction patients (internal control, ejection fraction ≥50%) exhibited the J-shaped association between mortality and BMI that is observed in the general population. Among patients with reduced ejection fraction (<50%), survival improved as obesity increased (P < 0.0001). Those with extreme obesity had the lowest mortality (n = 1134, P < 0.05).

Conclusion

In this cohort of reduced Ejection fraction patients, the obesity paradox was observed in all weight categories, with the highest survival of all observed in the extremely obese BMI category. This further supports hypotheses that an obesity-related physiologic phenomenon affects mortality in reduced ejection fraction patients.
Bridge to heart transplantation in patients with cardiogenic shock: a 20-year experience with two different surgical strategies
Authors: Sponga Sandro , Nagpal A. Dave , Vendramin Igor , Ferrara Veronica , Lechiancole Andrea , Maiani Massimo , Nalli Chiara , Di Nora Concetta , Guzzi Giorgio , De Manna Nunzio D. , Bortolotti Uberto , Livi Ugolino
Published: August 2020

Aims

We aimed to describe how treatment of patients in cardiogenic shock bridged to heart transplantation with mechanical circulatory support, using either biventricular assist devices (BVADs) or extracorporeal life support (ECLS), has evolved in the last 20 years in our centre.

Methods

Since 1998, 72 patients with refractory heart failure and indication for heart transplantation have received mechanical circulatory support: 40 had an ECLS system and 32 a BVAD.

Results

Early mortality was similar (17.5 vs. 9.4%, P = 0.25) regardless of the type of support. After a median support time of 8 (1–27) vs. 34 (0–385) days (P < 0.01), 70 vs. 65.6% (P = 0.69) of patients underwent transplantation in the two groups. Prior to transplantation, BVAD patients were more stable with lower need for mechanical ventilation (9 vs. 57%, P < 0.01) and dialysis (0 vs. 38%, P < 0.01). Thirty-day mortality after transplantation was similar (18 vs. 14%, P = 0.53). Patients with extracorporeal support had higher rates of renal (P = 0.02) and respiratory failure (P = 0.03), infections (P = 0.02), atrial fibrillation (P = 0.03) and longer ICU stay (P = 0.01). Late survival was similar, while 5-year freedom from coronary vasculopathy was higher in those with BVAD (P = 0.03).

Conclusion

Although ECLS provides faster and simpler assistance compared with BVADs, no differences in early and medium-term outcomes in the last 20 years were observed in patients with cardiogenic shock. However, BVADs provided longer duration of support, better multiorgan recovery allowing more adequate graft selection, resulting in a lower rate of posttransplant complications.
An overview from the 2019 Swine Fever Exercise for Agriculture Response in Iowa
Authors: Hennenfent Andrew K. , Rumsey Katie A. , Pruisner Robin D. , Kaisand Jeff J.
Published: August 2020

Iowa leads the United States in pork production, housing approximately one-third of the country's swine population. This puts Iowa at great economic risk if an outbreak of African swine fever, a disease that limits international trade opportunities, were to occur anywhere in the United States. To hone emergency response plans to combat an outbreak, the Iowa Department of Agriculture and Land Stewardship in September 2019 participated in a 4-day exercise with representatives from the other 13 top pork-producing states. This exercise involved a mock foreign animal disease response and helped to concisely summarize what pork producers could expect should a foreign animal disease be detected in Iowa.
Antinociceptive efficacy and safety of subcutaneous buprenorphine hydrochloride administration in African pygmy hedgehogs (Atelerix albiventris)
Authors: Doss Grayson A. , Mans Christoph
Published: August 2020

OBJECTIVE

To evaluate antinociceptive efficacy and safety of SC buprenorphine hydrochloride administration in African pygmy hedgehogs (Atelerix albiventris).

ANIMALS

12 healthy adult hedgehogs (7 males and 5 females).

PROCEDURES

3 crossover experimental trials were performed. In the first trial, all 12 hedgehogs were given single SC injections of buprenorphine (0.01 mg/kg [0.0045 mg/lb]), buprenorphine (0.03 mg/kg [0.014 mg/lb]), or saline (0.9% NaCl) solution (0.16 mL/kg [0.073 mL/lb]), and sedation and hind limb thermal withdrawal latency were measured. In the second trial, 6 hedgehogs were given single SC injections of buprenorphine (0.05 mg/kg [0.023 mg/lb]) or saline solution (0.16 mL/kg), and sedation and withdrawal latency were evaluated. In the third trial, 10 hedgehogs were given 3 doses of buprenorphine (0.05 mg/kg, SC, q 24 h) or saline solution (0.16 mL/kg, SC, q 24 h), and food intake and body weight were measured for 6 days.

RESULTS

For all 3 experimental trials, the sedation score was 0 for all hedgehogs at all assessment times. A single 0.01-mg/kg dose of buprenorphine significantly increased thermal withdrawal latency for 36 hours, and single 0.03- and 0.05-mg/kg doses significantly increased latencies for 48 hours. Increased locomotor activity was noted in a few hedgehogs after administration of the 0.03- and 0.05-mg/kg doses. Daily administration of buprenorphine did not have significant effects on food intake or body weight.

CONCLUSIONS AND CLINICAL RELEVANCE

SC administration of buprenorphine at single doses of 0.01, 0.03, and 0.05 mg/kg provided safe, long-lasting antinociception in African pygmy hedgehogs without apparent sedative effects.
Clinical Outcomes and Stifle Osteoarthritis Assessment of Nine Cats Before and After Tibial Plateau Levelling Osteotomy
Authors: Tamburro Roberto , Collivignarelli Francesco , Falerno Ilaria , Cerasoli Ilaria , Vignoli Massimo
Published: August 2020

This study aimed to evaluate the clinical and radio graphical outcome of cats following TPLO surgery for cranial cruciate ligament deficiency. Each cat underwent orthopedic assessment, pre-operative radio graphical evaluation, surgical procedure, postoperative management and clinical re-examination 1, 2, and 12 months following surgery. Age, body weights, TPAs, meniscal tears, implants and osteoarthritis progression were recorded. Postoperative OA score was compared with that obtained 1 year after surgery using a paired t-test with commercially available software. Radio graphical evaluation performed 1 year after surgery showed no significant OA progression (P-value > 0.1). Minor complications occurred in one case (#7) in which a mild to moderate seroma was observed ten days after surgery. No major complications were recorded. Although TPLO surgery in cats remains controversial, this study suggests that it was a suitable option for surgical treatment of feline cranial cruciate ligament rupture, but considering the ex vivo outcomes recently published, further in vivo evaluation is strongly recommended.
Accuracy Analysis of Aircraft Position at Departure Phase Using DGPS Method
Authors: Krasuski Kamil , Ćwiklak Janusz
Published: August 2020

The aim of this paper is to present the problem of implementation of the Differential Global Positioning System (DGPS) technique in positioning of the aircraft in air navigation. The aircraft coordinates were obtained based on Global Positioning System (GPS) code observations for DGPS method. The DGPS differential corrections were transmitted from reference station REF1 to airborne receiver using Ultra High Frequency (UHF) radio modem. The airborne Thales Mobile Mapper receiver was mounted in the cabin in Cessna 172 aircraft. The research test was conducted around the military aerodrome EPDE in Dęblin in Poland. In paper, the accuracy of aircraft positioning using DGPS technique is better than 1.5 m in geocentric XYZ frame and ellipsoidal BLh frame, respectively. In addition, the obtained accuracy of aircraft positioning is in agreement with International Civil Aviation Organization (ICAO) Required Navigation Performance (RNP) technical standards for departure phase of aircraft. The presented research method can be utilised in Ground-Based Augmentation System (GBAS) in air transport. In paper, also the accuracy results of DGPS method from flight test in Chełm are presented. The mean values of accuracy amount to ±1÷2 m for horizontal plane and ±4÷5 m for vertical plane.
Electro Pneumatic Control System for Inverted Pendulum
Authors: Popławski Krzysztof , Ambroziak Leszek , Kondratiuk Mirosław
Published: August 2020

The paper concerns the inverted pendulum control system with using pneumatic cylinder. A mathematical model of the pendulum used to derive the LQG controller was presented. Prepared laboratory stand was presented and described in detail. The main purpose of the work was experimental researches. A number of control process tests were conducted with variable model parameters such as additional mass, injected disturbances and so on. The results were shown on the time plots of the control object states.
Fractional Vector-Order h-Realisation of the Impulse Response Function
Authors: Pawłuszewicz Ewa
Published: August 2020

The problem of realisation of linear control systems with the
h
–difference of Caputo-, Riemann–Liouville- and Grünwald–Letnikov-type fractional vector-order operators is studied. The problem of existing minimal realisation is discussed.
Predictive Factors of Health Discharge Outcomes for Colorectal Cancer Patients in a Romanian Hospital
Authors: Petrișor Anamaria Nicoleta Crenguța , Forray Alina Ioana , Borzan Cristina Maria , Covaliu Bogdan Florin , Gabor-Harosa Florina , Domnariu Carmen Daniela
Published: August 2020

In-hospital data on colorectal cancer from Romania demonstrate differences from other European countries, especially in the mean age of patients, discharge rates and length of stay. Our study aimed to investigate possible factors that could predict the health outcomes at the discharge of colorectal cancer patients hospitalized in a Romanian county hospital. We retrospectively analysed 9009 colorectal cancer patients from a Romanian County Hospital. The model of binary logistic regression, a stationary or aggravated discharge disposition was associated with patients with age equal or higher than 60 years (p=0.002), the nonretirement status of patients (p=0.004), discharge from a surgical section (p=0.000), a surgical procedure performed during the hospitalization period (p=0.000) and a hospitalization period shorter than seven days (p=0.000). Potentially actionable demographic and hospital-level characteristics can predict colorectal cancer health outcomes of patients at discharge. Knowledge of this information would allow for several strategies that could improve the discharge planning.
Length-weight relationship, body condition, and fishing gear selectivity of shortfin scad (Decapterus macrosoma) landed in Banjarmasin fishing port, Indonesia
Authors: Ahmadi
Published: August 2020

The present study provides scientific information on the growth pattern and relative condition of shortfin scad, Decapterus macrosoma Bleeker landed in Banjarmasin fishing port, Indonesia. A total of 313 individual scad comprising 178 males and 135 females ranging from 152 to 225 mm total length and from 37 to 110 g weight were investigated. The body shape of both males and females showed isometric growth patterns indicating that all body dimensions grew at the same rate. The regression coefficient was significantly different between the sexes. The total length (TL), body weight (W), body depth (BD), W/TL, and BD/TL ratios and condition factors of the females were comparatively higher than those of males. The highest percentage of the catch was between 180 and 189 mm TL (32.59–40.45%) and 50 and 59 g W (20.65-21.79%). The relative condition factor values ranged from 0.799 to 1.433, which reflected the good condition of the fish samples. The estimated length at first capture (Lc50) and selection factor values were 180 mm and 3.54 for males and 185 mm and 3.64 for females. In the present work, the purse seine was considered to be a male-biased gear, with a sex ratio of 1.3 : 1. The outcomes of this research could be useful for sustainable pelagic fisheries management and for developing precautionary measures to prevent the overexploitation of this species.
Effects of circuit-type resistance training on industrial opiate induced neurotransmitter disruption and performance changes of previously addicted men
Authors: Arazi Hamid , Dadvand Seyedeh Shiva
Published: August 2020

Study aim: The aim of this study was to examine the effects of an 8-week circuit-type resistance training program on performance changes and neurotransmitter disruptions induced by industrial opiate in previously addicted men.

Materials and methods: Thirty industrial opiate addicted men volunteered to participate in this study and were randomly assigned to experimental (n = 15) and control groups (n = 15). The subjects in the experimental group performed circuit-type resistance training for 8 weeks, 3 days a week, with 40–75% of one-repetition maximum (1RM), while the control group did not perform any training. Before and after the training period muscular strength (1RM of bench press) and muscle endurance (sit-ups), flexibility (sit-and-reach), body fat percentage, waist-to-hip ratio (WHR) and cardio-respiratory endurance were measured. In addition, blood samples were drawn 24 h before and after 8 weeks of training to analyze serum levels of serotonin, dopamine, and endorphins.

Results: In this study, 8 weeks of circuit-type resistance training led to significantly higher serum levels of serotonin, dopamine, and endorphins, cardio-respiratory endurance, muscular strength and endurance in the experimental group compared to controls (P < 0.05), while flexibility, body fat percentage and WHR did not differ significantly (P > 0.05).

Conclusions: In conclusion, circuit resistance training can improve the serum levels of serotonin, dopamine, and endorphins, as well as indicators of health-related performance previously industrial opiate addicted men.
RANKL is a new epigenetic biomarker for the vasomotor symptom during Menopause
Authors: Kalkan R , Altarda M , Tosun O
Published: August 2020

During menopausal transition, decreased level of estrogen brings a number of physiological problems and hormonal changes. In this study, promoter methylation of RANKL and FSHR genes were identified in 30 premenopausal and 35 postmenopausal women using methylation-specific high resolution melting (MS-HRM) analysis. The statistical analyses and their association with patient characteristics were performed by Pearson χ2 and Fisher’s exact test (p <0.05). The methylated RANKL gene was detected in 16 postmenopausal cases, and 12 (75.0%) of the RANKL methylated cases had hot flashes (p = 0.024). The methylated FSHR gene was detected in 18 postmenopausal cases, and 13 (75.0%) of the methylated cases had hot flashes (p = 0.028). In vitro studies demonstrated the association between RANKL expression, FSH level and hot flashes in the mouse. Although lack of epigenetic studies in this field proves our results crucial and therefore, our results showed magnitude of epigenetic profiles of Turkish Cypriot post-menopausal women. This was the first study which has investigated the RANKL and FSHR methylation and their relationship with hot flashes in postmenopausal women.
Government Expenditure and Economic Growth Nexus in Mena Countries: Frequency Domain Spectral Causality Analysis
Authors: Ayad Hicham
Published: August 2020

The paper aims at examining the causal relationship between economic growth and government expenditure in selected MENA countries over the period of 1987–2017. Unlike previous studies, we examine the causality in both panel data and time series data to get a clear idea about the causal relationships individually and as a full sample. We also revisited the causal relationship between the two variables within the framework of frequency domain causality. Our findings support the neutrality hypotheses in the short-run term for most of the countries. Thus, economic growth and government expenditure at most frequency levels evolve independently. On the other hand, we found the support of Wagner’s law, Keynes view, neutrality and bidirectional hypotheses in the long term.
Investigation of Filtration Capacity of Surface Wastewater Filters by Mathematical Modelling
Authors: Marčiulaitienė Eglė , Meškauskaitė Laura , Pozniak Natalija , Sakalauskas Leonidas
Published: August 2020

As the urbanisation level increases, due to intensification of car traffic and increased areas of impermeable surfaces, pollution of surface wastewater and a negative impact on water bodies are increasing. Due to the increasing pollution of surface water bodies, the eutrophication process is taking place intensively. One of the technologies of surface wastewater treatment allowing reduction in the amounts of suspended solids (SS), heavy metals and other pollutants is surface wastewater filters. Filters with different fillers have been designed for the treatment of principal surface wastewater pollutants: suspended solids, heavy metals (zinc, cadmium, copper, lead), BOD5, total carbon and nitrogen. The Kriging method was adapted to test the efficiency of filters filled with construction waste and wood waste-derived biochar using distance matrices. The method developed makes it possible to model the characteristics of filters in relation to different fillers, using experimental results. The mathematical model is suitable for other filtrate characteristics, not only the ratio of fillers, but also the length of the filter life, its durability calculations, which allows optimizing filter cleaning efficiency up to 96.93 %.
Endocrine approach in the treatment of obesity: Is there any space for the adiponectin action?
Authors: Michalakis Konstantinos G.
Published: August 2020

Adiponectin is a hormone secreted by adipose tissue, exerting many positive effects in the human body. Its action has been widely studied, placing it into the metabolic health beneficial products of the adipose tissue. Nevertheless, adiponectin has been shown to exert some extra beneficial non metabolic actions, as well. Adiponectin levels can be related to reduced incidence of cancer in obese patients. Moreover, adiponectin has been shown to be implicated in the positive fertility outcomes of women. Some new studies have also indicated that adiponectin has a potential effect in the control of appetite, which raises a question, whether adiponectin could be accredited to be useful in the endocrine evaluation of obesity. Could these additional non-metabolic actions prove its helpfulness?
Model of the Market Value of Apartments Including a Time Variable and Energy Features of a Building
Authors: Foryś Iwona , Putek-Szeląg Ewa , Ziembicka Beata
Published: August 2020

Research background: The implementation of EU directives in national legislations imposes an obligation to monitor energy efficiency in every sector of the economy, including construction. In the era of energy conservation, which results from environmental requirements, as well as from constantly increasing energy prices, the energy consumption of premises and buildings becomes an important prerequisite for decision-making processes in the real estate market. There have also been changes in the provisions of the Act on Real Estate Management, which impose an obligation on the professional group of property appraisers to incorporate energy performance certificates for buildings and premises into the valuation process. Energy intensity in terms of the demand for heating of multi-family residential buildings will be the basis for the assessment of its impact on the market value of residential units.

Purpose: The article analyses the energy intensity of different types of buildings (e.g. low and high-rise buildings) and the diverse distribution of units in the building, especially with regard to their exposure to the different point of the compass. The research covered the Słoneczne housing estate in Szczecin, in a situation where the property appraiser does not have access to the energy performance certificates of the estimated apartments as well as apartments taken for comparison. The aim of the study is to identify the relationship between energy intensity and market value of residential units on the selected real estate market. The analysis will be based on data from the Price and Value Register of the County Office, a collection of statistics and public information as well as on the authors’ own databases and research.

Research methodology: A multidimensional analysis will be used to distinguish homogeneous groups of residential units due to their property attributes. The study will also employ a valuation model including energy intensity and time variables.

Results: The study showed that building type is one of the features determining energy consumption by a building. Depending on the period, the introduced attributes explained the evolution of the unit price at 78%, 75% and 24%. The parameters of the variables Size, Neighborhood and Time were found to be statistically significant. What is more, in all three periods, the value of the residential unit was significantly affected by the type of building which determined the energy performance of the building.

Novelty: Energy intensity in terms of the heating demand of multi-family residential buildings will be the basis for the assessment of its impact on the market value of residential units. The article analyses the energy intensity of different types of buildings (e.g. low and high buildings) and the different location of units in a building, especially in relation to the directions of the world.
Uniqueness of p(f) and P [f] concerning weakly weighted-sharing
Authors: Pramanik Dilip Chandra , Roy Jayanta
Published: August 2020

In the year 2006, S. Lin and W. Lin introduced the definition of weakly weighted-sharing of meromorphic functions which is between “CM” and “IM”. In this paper, using the notion of weakly weighted-sharing, we study the uniqueness of a polynomial function p(f) of f and a homogeneous differential polynomial P [f] generated by f. Our results improve and generalizes the results due to Charak and Lal, S. Lin and W. Lin, and H-Y Xu and Y Hu.
Common fixed points under contractive conditions of integral type
Authors: Bouhadjera Hakima
Published: August 2020

In this paper, we give some common fixed point theorems for a class of occasionally weakly compatible mappings satisfying contractive conditions of integral type. Our results generalize a host of previously theorems. We also present some illustrative examples which support our main results and show the applicability and validity of these results.
Some applications of generalized Ruscheweyh derivatives involving a general fractional derivative operator to a class of analytic functions with negative coefficients II
Authors: Atshan Waggas Galib , Kulkarni S. R.
Published: August 2020

In this paper, we study a class of univalent functions f as defined by making use of the generalized Ruscheweyh derivatives involving a general fractional derivative operator, satisfying

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)

A_{\gamma,{c_m}}^{\lambda,\mu,\nu}\left({1,\beta} \right)

.
A differential inequality involving Ruscheweyh operator and univalent functions
Authors: Kaur Pardeep , Billing Sukhwinder Singh
Published: August 2020

In the present paper, we find certain results on Ruscheweyh operator using differential inequality. In particular, we find sufficient conditions for starlike and convex functions.
Hybrid Sandwich Panels: A Review
Authors: Sandeep S.H. , Srinivasa C.V.
Published: August 2020

A high specific stiffness, high specific strength, and tailoring the properties for specific application have attracted the attention of the researchers to work in the field of laminated composites and Sandwich structures. Rapid use of these laminated composites and Sandwich structures necessitated the development of new theories that suitable for the bending, buckling and vibration analysis. Many articles were published on free vibration of beams, plates, shells laminated composites and sandwich structures. In this article, a review on free vibration analysis of shear deformable isotropic beams, plates, shells, laminated composites and sandwich structures based on various theories and the exact solution is presented. In addition to this, the literature on finite element modeling of beams, plates, shells laminated composites and sandwich structures based on classical and refined theories is also reviewed. The present article is an attempt to review the available literature, made in the past few decades on free flexural vibration response of Fiber Metal laminated Composites and Sandwich panels using different analytical models, numerical techniques, and experimental methods.
Application of Fractional Order Theory of Thermoelasticity in an Elliptical Disk and Associated Thermal Stresses
Authors: Thakare S. , Panke Y. , Hadke K.
Published: August 2020

In this article, a time fractional-order theory of thermoelasticity is applied to an isotropic homogeneous elliptical disk. The lower and upper surfaces of the disk are maintained at zero temperature, whereas the sectional heat supply is applied on the outer curved surface. Thermal deflection and associated thermal stresses are obtained in terms of Mathieu function of the first kind of order 2n. Numerical evaluation is carried out for the temperature distribution, Thermal deflection and thermal stresses and results of the resulting quantities are depicted graphically.
Stress and Displacement Intensity Factors of Cracks in Anisotropic Media
Authors: Kuznetsov S. , Karakozova A.
Published: August 2020

A relation connecting stress intensity factors (SIF) with displacement intensity factors (DIF) at the crack front is derived by solving a pseudodifferential equation connecting stress and displacement discontinuity fields for a plane crack in an elastic anisotropic medium with arbitrary anisotropy. It is found that at a particular point on the crack front, the vector valued SIF is uniquely determined by the corresponding DIF evaluated at the same point.
Hydrodynamic Forces on a Submerged Horizontal Circular Cylinder in Uniform Finite Depth Ice Covered Water
Authors: Sahu M. , Das D.
Published: August 2020

Hydrodynamic forces on a submerged cylinder in uniform finite depth ice-covered water is formulated by using the method of multipoles, the ice-cover being modelled as an elastic plate of very small thickness. The forces (vertical and horizontal) are obtained analytically as well as numerically and depicted graphically for various values of flexural rigidity of the ice-cover to show the effect of its presence. When the flexural rigidity and surface density of the ice-cover are taken to be zero, then the curves for the forces almost coincide with the curves for the case of uniform finite depth water with free surface.
Data-Driven Temporal-Spatial Model for the Prediction of AQI in Nanjing
Authors: Zhao Xuan , Song Meichen , Liu Anqi , Wang Yiming , Wang Tong , Cao Jinde
Published: August 2020

Air quality data prediction in urban area is of great significance to control air pollution and protect the public health. The prediction of the air quality in the monitoring station is well studied in existing researches. However, air-quality-monitor stations are insufficient in most cities and the air quality varies from one place to another dramatically due to complex factors. A novel model is established in this paper to estimate and predict the Air Quality Index (AQI) of the areas without monitoring stations in Nanjing. The proposed model predicts AQI in a non-monitoring area both in temporal dimension and in spatial dimension respectively. The temporal dimension model is presented at first based on the enhanced k-Nearest Neighbor (KNN) algorithm to predict the AQI values among monitoring stations, the acceptability of the results achieves 92% for one-hour prediction. Meanwhile, in order to forecast the evolution of air quality in the spatial dimension, the method is utilized with the help of Back Propagation neural network (BP), which considers geographical distance. Furthermore, to improve the accuracy and adaptability of the spatial model, the similarity of topological structure is introduced. Especially, the temporal-spatial model is built and its adaptability is tested on a specific non-monitoring site, Jiulonghu Campus of Southeast University. The result demonstrates that the acceptability achieves 73.8% on average. The current paper provides strong evidence suggesting that the proposed non-parametric and data-driven approach for air quality forecasting provides promising results.
The Utility of a Questionnaire Proposal as an Analytic Diagnostic Tool in Healthcare Providers Occupational Hand Eczema
Authors: Chiriac Anca E. , Taranu Tatiana , Chiriac Anca , Georgescu Simona Roxana , Foia Liliana , Podoleanu Cristian , Stolnicu Simona , Azoicai Doina
Published: August 2020

The aim of this study was to estimate the prevalence of self-reported work-related and occupational hand eczema, as well as associated risk factors in hospitals and out-patient clinics in Romania. A standardized questionnaire was addressed to health professionals from different medical fields. Out of 245 healthcare providers who completed the survey, 235 were women (95.9%), and 243 were working more than 8 hours/day in hospitals (99.18%). Hand eczema was self-reported and documented in almost one third of the nurses (33.49%), the most frequently involved trigger factor being powdered latex gloves. A total of 207 (84.48%) individuals denied any present or past allergic diseases. Only one nurse declared that severe hand eczema was the cause of losing her job at the hospital. Exposure assessment is essential for the diagnosis of work-related or occupational skin diseases.
Farmed fish as a source of dioxins and PCBs for Polish consumers
Authors: Mikołajczyk Szczepan , Warenik-Bany Małgorzata , Maszewski Sebastian , Pajurek Marek
Published: August 2020

Introduction

This paper reports polychlorinated dibenzo-p-dioxin (PCDD), polychlorinated dibenzofuran (PCDF), and polychlorinated biphenyl (PCB) concentrations in fish collected from Polish and Vietnamese farms and the related risk for consumers.

Material and Methods

Altogether, 160 samples were analysed using an isotope dilution technique with high-resolution gas chromatography coupled with high-resolution mass spectrometry (HRGC-HRMS). To characterise the potential health risk associated with PCDD/F and dioxin-like polychlorinated biphenyl (DL-PCB) intake, doses ingested in two 100 g portions of fish by adults and children were calculated and expressed as the percentage of the tolerable weekly intake (TWI) newly established by the EFSA in November 2018 at 2 pg WHO-TEQ kg−1 b.w.

Results

Generally, levels in fish muscles were low in relation to maximum limits (4), being in the range of 0.02–3.98 pg WHO-TEQ g−1 wet weight (w.w.) for PCDD/F/DL-PCBs and 0.05–24.94 ng g−1 w.w. for NDL-PCBs. The highest concentration was found in eel muscles. The least polluted were pangas and zanders and the levels were at the limits of quantification. Consumption of two portions of fish per week results in intakes of 9– 866% TWI by children and 4–286% TWI by adults.

Conclusion

Frequent consumption of some species (for example eel and bream) can pose a health risk to vulnerable consumers and especially children and pregnant women.
Business model maturity in management theory and practice – defining from an expert perspective
Authors: Niewiadomski Przemysław
Published: August 2020

Since many researchers and managers think about the essence, creation mechanisms and limits of the manufacturing model maturity, at this point, the author raises the question related to this issue: what dimensions (descriptions and desiderata) should be considered when conceptualizing this idea? The formulated question became a starting point and a point of conducting a creative synthesis, based, on the one hand, on a detailed analysis of the problem theory, and on the other hand – on the author’s own research. The above question and belief related to the existence of economic demand for results of application nature were the main inspiration to undertake research whose main purpose is to recognize: how the maturity of the business model is understood by selected experts operating in the Polish agricultural machinery sector?
Conditions of Steel Industry in Poland After Restructuring – the Analysis by Using C-D Model
Authors: Gajdzik Bożena
Published: August 2020

The primary objective of the article is to identify conditions of restructuring from the point of view of Polish steel industry by using Cobb and Douglas model (C-D). Both in European economies and Polish economy, the steel industry is included to important branch of industry. The steel sector has been a permanent component of the Polish economy. Restructuring of metallurgy in Poland has been realized since 1990s. Finally after several years of changes (in the first decade of the 21st century) steel plants adjusted theirs operations to market economy conditions. Nowadays we think that the steel sector has competitive position on the domestic and European markets but if it is truth. On the base of C-D model, the author of the article presents results of the statistical analysis and answer the question about influence property and employment on production in steel industry. Obtained relations between particular components of production function show the condition of steel industry in Poland.
Modelling and Simulation Testing of Main Bearing Loads and Strains in Crankshafts Caused by Deviations in the Position of the Shaft Journal and Bearing Axes
Authors: Nozdrzykowski Krzysztof , Grządziel Zenon
Published: August 2020

This article presents the results of a simulation, testing the variation of main bearing loads and strains in crankshafts caused by geometrical deviations of the bearing system to justify the necessity and purposefulness of measurements of both the shape and axes position deviations of crankshaft journals. Measurements of these deviations at the existing level of applied measuring techniques are significantly limited. The research also accentuates the practical implementation of a measuring system equipped with the so-called flexible support system for the measured object, developed at the Maritime University of Szczecin. This system makes it possible to eliminate elastic deformations of the crankshaft due to its own weight, whereby the measurements of geometrical deformations of the crankshafts can be carried out with appropriate accuracy in conditions corresponding to the non-reference measurements when determining the object measured in counterpoints. The obtained results have fully confirmed the purposefulness of the conducted research and the validity of the theses.
Problem of Interruptions in Reinforcement Works and Longwall Exploitation
Authors: Biały Witold
Published: August 2020

This paper presents the problem of technical means failure, used both in longwall reinforcement and in the mining process. Longwall reinforcement – a concept related to launching a longwall mining excavation – is one of the most important elements in the process of hard coal seams exploitation. It consists in introducing all necessary machinery and equipment to the future longwall in order to enable the effective mining process. The efficiency of a longwall excavation as well as works related to the reinforcement of longwalls depends directly on properly selected machines and equipment of the longwall complex. In order to ensure greater effectiveness and efficiency, it is necessary to find the causes of the most frequent failures in these processes and effectively counteract them. These actions result in increased production availability of machines and equipment involved in the mining process. The increase of production availability is significantly influenced by the technical condition of technical means used both in longwall reinforcement and in the mining process, and their proper selection. This will ensure a largely failure-free and uninterrupted progress of works.