bluuebunny/crossref_metadata_2025 huggingface dataset:
Joint computation and power allocation for NOMA enabled MEC networks in the finite blocklength regime
Authors: Tang Huaiyu , He Bingtao , Zhou Yuchen , Yang Long , Chen Jian
Published: November 2021

This paper investigates the reliable computation offloading in non‐orthogonal multiple access enabled mobile edge computing networks, where the short‐packet technique is adopted to meet the stringent latency requirements of delay‐sensitive computing services. To characterize the reliability of computation offloading with finite blocklength coding, a novel analytical framework is developed to approximate the average overall block error probability (AOBEP) by using a double‐case linearization. With the derived approximate expression for AOBEP, the joint optimization of computation workload and transmit power is further investigated, in order to minimize the AOBEP under the computation/communication delay constraints. To tackle the non‐convexity of the formulated problem, the formulated problem is first decomposed into the computation workload problem and the transmit power allocation problem. For the computing workload problem, a closed‐form solution is derived. Then, by applying the derived workload allocation, the power allocation is transformed into the convex form through some approximations and solved by the successive convex approximation technique. Finally, simulation results are provided to demonstrate the reliability enhancement of computation offloading and reveal the relationship between the workload/power allocation and the communication/computation delay.
Dental amalgam risks in dental staff: systematic review
Authors: Manyani Abdelkarim , Chaou Hanane , Rhalem Naima , Soulaymani Abdelmajid , Soulaymani Bencheikh Rachida
Published: November 2021

Mercury is an essential constituent of dental amalgams, several studies have shown that dental personnel who work with dental amalgams are chronically exposed to mercury vapors. The World Health Organization considers that inhaling mercury vapors can have harmful effects on the nervous, immune, pulmonary and renal systems. The objective of this review was to collect and analyze data relating to the exposure of dental personnel to mercury and the possible harmful effects on human health. All biomonitoring studies published between 2002 and 2019 measuring mercury in hair, blood, urine and nails were included. Dentists reported higher levels of mercury in their biomarkers compared to control groups. These levels reflected occupational exposures to chronic low levels of elemental mercury in dental amalgam fillings. Some studies have shown a high prevalence of neurological symptoms and memory deficit in dental staff compared to controls. Studies based on genes involved in mercury metabolism have shown associations between sources of mercury exposure and single nucleotide polymorphisms in these genes. It is important that preventive measures are strengthened to reduce exposure to mercury and that a biomonitoring program for dental professionals exposed to mercury vapors is implemented.
Nosocomial infections: Importance of rapid and early detection of ESBL Enterobacteriaceae by molecular biology
Authors: Lahdibi Sahraoui Hajar , Qasmaoui Aicha , Charof Réda , Hamamouchi Jamila , Berny El Hassan
Published: November 2021

Nosocomial infections are a major public health problem. They are mainly caused by bacteria that often present antibiotic resistance profiles, which complicates their management. The diagnosis of these infections is based on clinical and biological criteria that lack sensitivity and specificity, and on microbiological examinations that are lengthy. Unfortunately, the inadequate empirical antibiotic therapy in many cases, and the late implementation of an effective treatment, are associated with the emergence and spread of bacteria that are multi-resistant to antibiotics, i.e. strains producing extended-spectrum beta-lactamases (ESBL). Rapid diagnostic methods, identifying the pathogen and its resistance profile, are therefore necessary. Our laboratory is committed to develop PCR techniques to genotypically identify the most frequent ESBLs from four hospital facilities. Among all the enterobacteria detected, we observed the predominance of OXA type ESBL (38%), followed by CTX-M type ESBL (33%). TEM and SHV genes represent respectively 19% and 10%.The optimization of these technologies could allow the identification of all known resistance mechanisms in only a few hours and find new preventive or curative strategies in the fight against these nosocomial infections, to better respond to this health threat.
Unintentional Accidents among Children: Associated Factors with moderate /severe forms
Authors: Mouad Assia , Boughaleb Fadoua , Aqqaoui Loubna , Lafia Toualouth , Skiredj Aya , Erraji Mounir , Ettayebi Fouad , Oubejja Houda
Published: November 2021

Unintentional accidents are very common in children and are the main reason for consultation and hospitalization in paediatric surgery. Aim: To determine the factors associated with unintentional accidents resulting in hospitalization. Material and methods: This is a cross sectional study carried out in the Paediatric Surgical Emergency Department of the Children's Hospital of Rabat over a period of 4 years. We processed 1205 children's files; the data was collected and analysed by Jamovi. Results: for the 545 files selected, the median was 8 years [4; 12] and boys were predominant (70.4%). Sociodemographic factors were represented by low health insurance. In 95.1% of cases, the family lived in a house (50.1%) or an apartment (45%) compared to 4.9% who had insanitary house. For parents' level of education, fathers had a high school education (43.6%) or never attended school (16.9%), compared to 32.9% of mothers who did not attend school. No adult was present during the accident (54.6%). The accident occurred on weekdays (73.2%), especially on winter and summer (41.6% and 33.8%). The main lesions were fractures (53%). The lesions involved the limbs (52.5%) and the head (30.2%) and were multiple in 6.5% of cases. The outcome was simple in 96.1%.
Assessment of asthma treatment against SARS CoV-2 by using a computer approach
Authors: Hajji Halima , El Khatabi Khalil , Zaki Hanane , En-nahli Fatima , Hajji Lhossain , Lakhlifi Tahar , Ajana Mohammed Aziz , Bouachrine Mohammed
Published: November 2021

The disease caused by the coronavirus is called COVID-19. The degree of infection varies from one person to another. According to the data collected to date, people with asthma and obesity are over-represented among adults hospitalized for COVID-19. The reason is very simple: COVID-19 is a disease that particularly attacks the respiratory system, including the lungs. This pandemic has led us to return to plants. Modern medicine has found its success thanks to traditional medicine, the effectiveness of which comes from medicinal plants. Currently, in China, many people believe in the miraculous power of plants, boosting their immunity to protect against asthma. Therefore, this work aimed to study components of natural origin that have an anti-asthma effect that can be considered as the panacea against Covid-19, by using the most important method, which is molecular docking. In this research, we performed a molecular docking study on molecules naturally occurring molecules based on the recently crystallized SARS CoV-2 protein (pdb code 7C6S). ADMET prediction was performed for the selected inhibitors. The results of molecular docking and ADMET prediction support the potential of the five selected molecules to be further developed as novel inhibitors for the treatment of SARS CoV-2.
Bibliographic review of phytopharmacovigilance actions and measures on plant protection products in Morocco
Authors: Bahouq Madiha , Bahouq Hanane , Soulaymani Abdelmajid
Published: November 2021

Plant protection products present major risks to human health. Like other countries, Morocco is adopting phytopharmacovigilance measures. These steps are part of Morocco’s integrated approach aiming the rational use of pesticides. A census of the various actions and measures undertaken by Morocco through the National Food Safety Office (ONSSA) in terms of monitoring and controlling the use of pesticides for agricultural use will be presented. Between 2018 and 2020, Morocco proceeded with the withdrawal of 15 active substances and 48 pesticides and the discharge of 10 tons of imported pesticides that did not comply with standards with a review of 10 active substances harmful to humans and animals. A quantity of 17641 tons of food products unfit for consumption by excess of pesticides, 136 tons of potatoes and 125 tons of mint were sent back and destroyed due to high maximum residue limits or use of unauthorized pesticides. In the same context, training workshops for farmers on the proper use of pesticides and the management of potential risks of poisoning are organized. As well as the adoption by the Moroccan government in 2020 of a law project to limit the use of dangerous pesticides and promote alternative methods.
Place of the paravertebral block in post-operative analgesia in thoracic surgery
Authors: Matouk Mohamed , Ait mouheb Tahar , Benmouhoub Nacera
Published: November 2021

The thoracic epidural analgesia (TEA) remains the standard gold for analgesic support in thoracic surgery, there is an interesting alternative to epidural analgesia, which is the paravertebral block (PVB). The aim in our study was to assess the value of performing a PVB in the management of postoperative pain in thoracic surgery compared to TEA. Methods: 80 patients were randomized to receive either epidural analgesia (n = 38, 10 cc bupivacaine 0.5% + 10 ϒ Sufentanyl then 10 cc Bupivacain 0.1% + 10 ϒ Sufentanyl via a PCA device) or PVB analgesia loss of resistance technique (n = 40, 10 cc bupivacaine 0.5% + 10 ϒ Sufentanyl via a PCA device). All patients received standard general anesthesia. The peri-operative parameters studied include standard measurement, EVA scale at rest and mobilization, use of morphinics. Results: there is a significant difference between the two groups and the incidents of puncture were significantly more important for the APDT group. The postoperative pain assessment by EVA did not show a significant difference between TEA and PVB Conclusion: the comparison of PVB to TPDA did not find significant difference in the efficacy of analgesia and the side effects. The BPV could be proposed as a first intention for postoperative analgesia in thoracic surgery.
Medical staff who use ionizing radiation at Ibn Rochd University Hospital Center of Casablanca, Morocco: evaluation of radiation protection knowledge
Authors: Hjiyej Andaloussi Lamia , Harrass Hicham , Aschawa Hind , Hlousse Fatima Zahra
Published: November 2021

Hospital activity of professionals who use ionizing radiation (IR) at work generates risks on their health. Good knowledge of radiation protection (RP) rules can contribute to minimize these risks. This descriptive and analytical study, carried out from March 25 to May 14, 2019 as a survey, focused on knowledge about IR and RP. It was intended for medical and paramedical staff from several departments of Ibn Rochd UHC in Casablanca. Among 135 surveyed workers, 83% with median age of 31 years (21 to 54 years) participated. 65.17% of participants were physicians whose 76% were in training. 47% of respondents had a high global level of knowledge, with mean score of 6.6/10. IR average score (7.8/10) were better than RP average score (6.23/10). The scores varied significantly according to RP education (p<0.002) and home department (p<0.002). RP score was more strongly correlated to RP education (η2=0.32) than to department membership (η2=0.14). Medical staff RP knowledge are insufficient. In order to improve workers’ knowledge on RP, and thereby protect their health, it would be desirable to set up systematic pre-hire training and continuing education programs as well as integrate a radiation safety officer into all departments operating under IR.
Ecological sanitation a new approach to protect public health and environment in rural areas of Morocco
Authors: Taouraout Aziz , Chahlaoui Abdelkader , Ouarrak Khadija , Aaziz Hicham , Belghyti Driss
Published: November 2021

Wastewater and human excreta are threatening the quality of groundwater and watercourses in rural areas of Morocco. The new sanitation approach that has advantage to solve the problems of pathogens of human waste at source and offering the possibility of reusing them after treatment is called Ecological Sanitation (EcoSan) could be an alternative solution to the conventional one.

It is in this perspective that our study made an investigation on economic, ecological, sustainable sanitation techniques adapted to the Moroccan context. Indeed, a survey was carried out at Dayet Ifrah village to assess the population appreciation of the EcoSan structures installed. Survey results showed that these structures have been generally accepted by almost all users and non-users (95%).

On the other hand, a pilot-scale system composed by two types of filters (vertical constructed wetland and vertical Multi-Soil-Layering) have been installed in order to treat domestic wastewater coming from a single household and their performance was evaluated. The filters showed good performance to remove organic pollution (> 84.5%) and orthophosphate (> 68%). The reduction of ammonium were 84.5% and 35.3% for vertical Multi-Soil-Layering and vertical constructed wetland, respectively. The quality of the wastewater treated was evaluated in accordance with the standard of the rejection limit value adopted by Morocco.
Prediction of 24-Hour Urinary Sodium Excretion Using a Single Spot Urine Samples in Moroccan Population
Authors: Idrissi Mohamed , Saeid Naima , Rami Anass , El Mzibri Mohammed , Assako Arthur , jahdiel Koussou , El Hamdouchi Asmaa , Safsaf Naima , Belakhel Latifa , Benkirane Hasnae , El Kari Khalid , Bagri Abdallah , Aguenaou Hassan
Published: November 2021

Background: Excessive sodium intake is linked to high blood pressure. Estimating sodium intake is difficult. The 24-h urine collection is currently the recommended method for estimating intake but cumbersome for large population studies. Predictive model to estimate sodium intake based on single spot urine were developed, but showed inconsistency when used in extern populations. This study aims to develop a specific model for estimating sodium excretion over 24 hours for the Moroccan population. Methods: 371 participants in the urinary validation sub-study of the STEP-wise survey-Morocco 2017-2018 provided a valid 24-hour urine collection and spot urine specimens. Participant were randomly assigned to the training (n=183) and the validation data set (n=188). Results: A prediction model for 24-hour sodium excretion was developed. Adjusted R2 was 0.258. In the validation data set, correlation was 0.431 [95%CI; 0.258-0.580], and the adjusted R2 was 0.190. The Bland-Altman plot showed a nonsignificant small mean bias of -18 mg (95%CI, -213 to 177) in predicting 24-h urinary sodium excretion at the group level. At the individual level, limits of agreement were wide. Conclusion: This new model developed from a single spot urine could be used to predict the average 24-h sodium excretion of Moroccan adults.
Antibacterial power of Olea Europaea extracts from different Moroccan regions
Authors: Sahraoui Hajar Lahdibi , Qasmaoui Aicha , Charof Réda , Hamamouchi Jamila , Berny El Hassan
Published: November 2021

The discovery of antibiotics has always been a medical advance that has improved the prognosis of infections. However, resistance to these products has evolved into a major health problem. Some diseases are even resistant to all antibiotics currently available on the market. A reduction in the use of antibiotics must be based on other approaches, namely the use of alternative treatments to antibiotics, such as phytotherapy. In the same objective our study focused on the research of the antibacterial power of Olea Europaea known for its various medicinal properties. 31 bacterial strains were tested for their susceptibility using the agar diffusion method, and we determined their MIC by the micro titration technique on microplates. Five bacteria belonged to the American collection (ATCC) and 26 strains isolated from nosocomial infections between the period of 2011 and 2015. We noticed that our aqueous, methanolic, ethanolic and ethyl acetate extracts are active against all tested bacteria. On the other hand, we observed that the hexane and dichloromethane extracts showed no inhibition effect on all the bacteria tested. The methanolic extract showed a higher MIC against ESBL enterobacteria (E. coli, E. cloacae, P. mirabilis) and imipenem-resistant A. baumanii. The lowest MIC was 1.56 ug / ml.
Assessment of occupational risks in a citrus fruit extraction company in Morocco
Authors: Ait El Hadj Fouzia , Rachidi Hafida , Rachidi Fatima
Published: November 2021

The human and financial consequences of work-related accidents are major for companies and their staff. In this context, we proposed to undertake a study based on the Evaluation of Occupational Risks (EvOR) within a company processing citrus fruits into juice in its various work units. The aim of our work was to identify and prioritize the existing occupational risks and to propose preventive and corrective actions and adequate and adapted protection measures. First of all, we carried out an analysis of the work accidents that occurred in the company, and we noted an increase in the number of days off work due to work accidents, approximately 320 days per year. We then concluded that 55% of the accidents that occurred were considered to be of medium and fairly serious gravity. The method we adopted is that of the INRS and is based on five fundamental steps: inventory of work units, identification of risks, estimation of the seriousness of damage, prioritization of risks and development of a corrective and preventive action plan. The main risks identified are mainly organizational, biological, chemical, mechanical and technical. Based on the results of this analysis, we proposed a corrective and preventive action plan to the employer to eliminate or reduce the identified risks to an acceptable level, and subsequently improve the working conditions of the employees while complying with the normative and legislative texts in force.
Susceptibility patterns of bacteria isolated from the hospital environment towards disinfectants commonly used for surfaces and medical devices
Authors: Jaouhar Samira , El Ouali Lalami Abdelhakim , Bouzid Jawad , Zeouk Ikrame , Bekhti Khadija
Published: November 2021

This study aimed to evaluate the bactericidal activity of common disinfectants used for surfaces and medical devices. Sodium hypochlorite (D1), disinfectant (D2) composed of N-(3-aminopropyl)-N-dodecylpropane-1,3-diamine, chloride de didecyldimethylammonium, and disinfectant (D3) composed of Didecyldimethylammonium chloride and Polyhexamethylene biguanide hydrochloride, were tested against 15 strains isolated from the hospital environment and four reference bacteria. The microdilution method was performed to assess antimicrobial activity. The susceptibility was evaluated by comparing the minimum inhibitory dilution with the dilution of disinfectant recommended by the manufacture. D1 and D2 were active against Staphylococcus epidermidis, Staphylococcus saprophyticus, Enterobacter cloacae, Escherichia coli, Pseudomonas fluorescens, Methicillin-resistant Staphylococcus aureus, Bacillus spp, Corynebacterium spp, Gram-positive bacillus, Escherichia coli ATCC 25922, Bacillus subtilis ATCC 3366, and Pseudomonas aeruginosa ATCC 27853 strains but not active against Micrococcus spp, and Staphylococcus aureus ATCC 29213. D3 was ineffective against Micrococcus spp, Bacillus Gram Positive, Staphylococcus epidermidis, and Escherichia coli ATCC 25922. Therefore, D1 and D2 can eliminate most pathogenic bacteria in hospitals, in comparison to D3. It is necessary to monitor the antibacterial activity of disinfectants against reference strains but also against those usually present on surfaces. The obtained results could have promising applications in controlling the emergence of nosocomial infections.
Development of stability indicating method for quality assessment of African Albendazole tablets
Authors: Hssaine Amine , El Karbane Miloud , Azougagh Mohamed , Houti Imad Eddine , Benaji Brahim
Published: November 2021

In order to assess the quality of Albendazole tablets (Alb) sampled in three countries from West Africa, several physical and chemical tests were performed on tablets at normal conditions. A simple and economic HPLC method has been developed, validated and used for the simultaneous determination of Albendazole (Alb) content, as well as its impurities and the uniformity of its content. The stability-indicating HPLC method was performed on a Symmetry C18-5µm 250 mm × 4.6 mm column with a gradient elution using a mobile phase composed of acetonitrile and sodium acetate buffer. The flow rate was set at 1 mL.min−1 and the eluent was monitored at 295nm. The method was validated for specificity, linearity, accuracy, precision, robustness and detection and quantification limits, in accordance with International Conference on Harmonisation Quality 2 (ICH Q2) guidelines. This method was performed on different Alb samples (originals and generics) products collected from Senegal, Niger and Mali. The obtained results showed that, the contents of the generic tablets from Niger and Mali comply with the United States Pharmacopeia (USP) monograph acceptance criteria. However, more than 20% of the generic tablets don’t meet the USP monograph impurity limits. In conclusion, the described analytical method is simple, sensitive and accurate. Thus, it could be useful for manufacturing and quality control assays.
Radiodiagnostic Equipment: Regulations and Materiovigilance
Authors: El Younoussi Laila , Benaji Brahim , Azougagh Mohammed , Lebbar Souad , El hamidi Lekbir , Soulaymani Abdelmajid , Mokhtari Abdelrhani
Published: November 2021

The use of medical devices (MDs) in the field of medical imaging has always been governed by rigorous regulations, in particular the authorizations and compliance of radiological installations and premises in view of the risks generated by the ionizing radiation produced by these MDs. The regulatory bases that deal with equipment emitting ionizing radiation are diversified between those specific to the protection of the public and users of ionizing radiation and those relating to medical devices. In addition, radio-diagnostic equipment must provide all the guarantees in terms of the balance between benefits and risks. Although radiation protection is essential, materiovigilance is one of the key elements of technological monitoring and surveillance of the risks that may result from the use of these medical devices after they have been placed on the market. The Moroccan legislation has a legal arsenal in accordance with the model of the World Health Organization’s global regulatory framework for medical devices. It outlines regulations and adheres to international guidelines in the field of vigilance against ionizing radiation. However, it is necessary to move on to the specification of procedures in order to remove any ambiguity.
Vigilance towards the use of artificial intelligence applications for breast cancer screening and early diagnosis
Authors: El Ouahabi Younes , Alaoui My Hachem El yousfi , Nsiri Benayad , Soulaymani Abdelmajid , Mokhtari Abdelrhani , Benaji Brahim
Published: November 2021

Breast cancer is a real public health problem in Morocco. It is the cause of a significant number of deaths caused by late diagnosis. Mammography plays an essential role in the detection of breast cancer and in the early management of its treatment. Despite the existence of screening programs, there are still high rates of false positives and false negatives. Indeed, women were called back for additional diagnoses based on suspicious results that eventually led to cancer. Artificial intelligence (AI) algorithms represent a promising solution to improve the accuracy of digital mammography offering, on the one hand, the possibility of better cancer detection, and, on the other hand, improved efficiency for radiologists for good decision-making.

In this work, through a review of the literature on the tools used to evaluate the performance of AI systems dedicated to early detection and diagnosis of breast cancer. We set out to answer the following questions: Is the ethics relating to patient data during the development phase of this software is respected? Do these tools take into consideration the specificities of the field? What about the specification, accuracy and limitations of these applications?

At the end, we show through this work recommendations to adapt these evaluation tools of AI applications for breast cancer screening for an optimized and rational consideration of the principle of health vigilance and compliance with the regulatory standards in force governing this field.
Antibiotic resistance in uropathogenic enterobacteria
Authors: Hamamouchi Jamila , Qasmaoui Aicha , Halout Karima , Charof Réda , Ohmani Farida
Published: November 2021

Multidrug-resistant Enterobacteriaceae are a major public health threat worldwide. These germs are the most redoubtable because they are producers of beta-lactamases and possess other mechanisms of resistance to many antibiotics. The objective of this work is to identify isolated strains of Enterobacteriaceae and to study their antibiotic resistance profiles, thus contributing to the surveillance of antibioresistance. This is a retrospective study over a period of three years (2018-2020) including urine samples taken in the region of Rabat-Salé-Zaire and examined at the laboratory of Epidemic Diseases in National Institute of Hygiene of Rabat. Enterobacteriaceae were the most frequent germs with a predominance of Escherichia coli (68%) followed by Klebsiella pneumoniae (23%). Extended-spectrum beta-lactamase-producing Enterobacteriaceae accounted for 10.5%. The highest resistance was observed with amoxicillin, followed by ticarcillin, cefalotin, trimethoprim/sulfamethoxazole, amoxicillin+clavulanic acid, nalidixic acid and finally ciprofloxacin and norfloxacin. The aminoglycosides and the 2nd and 3rd cephalosporins were the most active molecules. The sensitivity of imipenem and ertapenem was 100%. This study shows the worrying appearance of resistance to the usual antibiotics in uropathogenic enterobacteria. Rational prescription of antibiotics and monitoring of the evolution of bacterial resistance are necessary in each region.
Microbiological evaluation of certain fruits and vegetables marketed in the city of Kenitra-Morocco
Authors: Erahioui Rahma , Inekach Sultana , Jaber Hassna , Atfaoui Khadija , Rhaim Noureddine , Mennane Zakaria , Ouhssine Mohammed
Published: November 2021

Fruits and vegetables are essential for human health due to their nutritional qualities, but the consumption of raw foods leads to food safety problems as they are recognized as sources of transmission of infectious diseases. The objective of this work is to assess the microbiological quality of some fruits and vegetables marketed in the Kenitra city. The samples were purchased at the fruit and vegetable markets during the period from April to July 2018.The detection of microorganisms in the samples requires several steps which are weighing, dilution, isolation, enumeration and 'identification. The results of the microbiological analysis of fruits and vegetables studied show significant concentrations of the total aerobic mesophilic flora varies between 2.25 and 8.48 log10 CFU / ml, Concerning total coliforms the contamination rates vary between 1.92 and 8.42 log10UFC / ml, as well as the presence of fecal coliforms between 1.13 and 8.05 log10UFC / ml, in the same samples analyzed, strains such as: Escherichia coli, staphylococcus aureus and a total absence of salmonella and shegilla. In order to improve the safety and hygienic quality of fruits and vegetables, the application of good hygienic practices as well as continuous microbial quality control is necessary to protect the health of consumers.
About Effect of Hydroelectric Construction on Some Features of Fish Biology
Authors: Matrosova Inga Vladimirovna , Kalinina Galina Georgievna
Published: November 2021

Restructures in the communities of hydrobionts take place for the rivers with abrupt changes in hydrography and hydrological regime, as a result of flow regulation. They require long-term monitoring to develop preventive measures to avoid negative consequences and to restore the river ecosystem. Some biological characteristics of the broad whitefish (Coregonus nasus) have been studied during spawning migration in the upper reaches of the Yenisei River. The limiting values of the fish length were higher in 2016, and the average - in 2013. In 2013, the sampling frame consisted of fish of 51-55 cm in size, in 2014 and 2016. - 41-45 cm. In 2013, most of the fish in the catches were aged from 6+ to 11+ years, in 2014 - from 8+ to 10+ years, in 2016 from 8+ to 11+ years. The gender ratio was close to 1:1; most of the individuals had gonads at maturity stage III.
Reliability Performance of Shipboard Power Complexes with Regard to Ecosystem Effects
Authors: Plotkina Victoria Aleksandrovna
Published: November 2021

The article deals with the impact of ecosystem on the operability of ship power systems. It is shown, that influence is caused by fouling of a vessel hull by various microorganisms, spontaneous destruction of external structures of vessels and hydrometeorological external factors. Methods of solving the problem of ecosystem impact on power complexes of marine equipment are given.
Impact of Particulate Matter Emissions from Ship Power Plants on the Port City Environment
Authors: Grigorieva Elena V. , Chernyshev Valery V. , Kulichkov Sergei V. , Andreeva Larisa V.
Published: November 2021

The paper deals with one of the methods for assessing anthropogenic impact of the operation of ship power plants in port areas on the environment. The measurement of mass concentration of particulate matters (PM) in the open air was carried out during summer and winter in eight points of the city that were selected depending on the conditions of orographic characteristics of the area. Moreover, vessel traffic in coastal waters was assessed and information on the number and type of vessels was collected. Based on the data obtained, the total PM volume emitted with exhaust gases from ship power plants in the port areas during a year was calculated.
Cascade Temperature Control Data Analysis in Oil and Gas Industry
Authors: Kremenetskaya Marina
Published: November 2021

Currently, one of the most effective methods of personnel training for the oil and gas industry is training on computer simulators. Studies show that most often emergencies occur in small areas of large production facilities, which indicates the existence of a problem with the possibility of training and development of simulators for basic objects of complex production chains. Nowadays, there are a lot of technical and technological solutions in the field of simulators, however, the segment of simulators of basic units and equipment of oil and gas industry objects is practically absent. In order to develop computer simulators that fully correspond to real objects, it is necessary to build adequate mathematical models. Within the framework of this research, the development of mathematical and structural models of the basic object of the oil and gas industry has been performed.
Application Features of Thyristor Regulators to Control the Light Flux in Industrial Fishing
Authors: Matafonova E.P. , Burkhanov S.B.
Published: November 2021

To control the intensity of the light flux when fishing saury it is necessary to widely change the voltage of the lighting fishing equipment. It is reasonable to carry out this by controlling additionally installed thyristor regulators supplying individual symmetric three-phase groups of light sources that will ensure balanced loading of the synchronous generator stator windings. In this research the features of using a thyristor voltage regulator in a four-wire system of ship power supply are studied based on mathematical analysis, conclusions are made using computer modeling and the use of current limiting reactors is justified.
Development and Performing of a Method of Comparative Flammability Tests of Magnesium Alloys
Authors: Barbot’ko Sergey , Volniy Oleg , Trofimov Nikolai , Leonov Aleksandr , Sivenkov Andrei , Gravit Marina
Published: November 2021

Magnesium alloys find their application in aviation technology for manufacturing of structural elements in uninhabited compartments and outside areas with increased fire hazard. At the stage of development of magnesium alloys with low fire hazard, it is advisable to perform comparative tests on relatively small samples so that all test equipment can be located in a laboratory. A method has been developed for conducting flammability tests when exposed to a flame with a temperature of 1,100 ° C for samples of magnesium alloys of small sizes. Comparative tests of two magnesium alloys - the standard ML5 and the new experimental one with increased fire safety - have been carried out. Significant differences have been established in the flammability and extinguishing ability of various grades of magnesium alloys - it is shown that the samples of the experimental magnesium alloy, in comparison with the ML5 alloy, are more difficult to ignite and in most cases can self-extinguish rapidly, while the weight loss of the sample practically does not occur.
Development of the System of Standardization of Quality Control of Fire Protection at Facilities
Authors: Bulaga Sergey , Smirnov Nikolai , Bulgakov Vladimir , Zuban’ Ol’ga , Ustinov Andrei , Zybina Ol’ga
Published: November 2021

The analysis of the existing regulatory documents in the field of quality control of fire-resistant treatment of various products and structures is carried out. The history of the development of the system of rationing the quality of fire protection is described. Information about the new standard for quality control of fire protection is provided. An example of application of methods of quality control of fire-retardant treatment is presented: the algorithm of quality control of two intumescent coatings, one taken from the existing facility, and one chosen as a control sample (the certified intumescent paint) has been practically executed. As a result, it was established that the existing quality control methods, including methods of thermal analysis, can provide adequate results and should be used ubiquitously.
Transaction Costs Data Impact on Process Self-Organization Evaluation of Quality Management System
Authors: Klochkov Yury
Published: November 2021

This paper will focus on the transaction costs analysis approach to estimating the level of quality management systems self-organization. It became possible to consider transaction costs in quality management systems with the reclassification of consumer. A suggested classification of consumers includes both “external’ and “internal” consumers and also “hidden” and “latent” consumers. Another approach of accounting costs and consumers data allowed us to analyze quality management systems by the share and the level of self-organization.
Déclaration de consensus sur l’évaluation et la rééducation myofonctionnelles orofaciales chez les patients souffrants de SAOS : proposition d’un processus international par la méthode Delphi
Authors: Moeller Marc Richard , Weber Silke Anna Theresa , Coceani-Paskay Licia , Amat Philippe , Bianchini Esther Gonçalves Mandelbaum , Botzer Eyal , Boyd Kevin , Bruni Oliviero , de Felicio Claudia Maria , Hrubos-Strøm Harald , Jagomagi Triin , Keenan Sharon , Moeller Joy Lea , Kwok-Keung Daniel , O’Connor Reina Carlos , Pirelli Paola , Spruyt Karen , Suzuki Mayumi , Weaver Samantha , Zavras Athanasios I , Randerath Winfried , Kryger Meir
Published: November 2021

La rééducation myofonctionnelle orofaciale a été montrée efficace dans la prise en charge multidisciplinaire du syndrome d’apnées obstructives du sommeil chez l’enfant, l’adolescent et l’adulte, et elle est prescrite à plusieurs étapes de ces prises en charge. Cependant, compte tenu du manque d’homogénéité des protocoles de traitement et de mesures des résultats, du manque de recherches sur le type, la fréquence et la durée des exercices myofonctionnels et sur les phénotypes spécifiques qui peuvent en bénéficier, il apparait nécessaire de définir des recommandations de bonne pratique.

Un consensus de recommandations Delphi consacré à l’évaluation et au traitement myofonctionnel orofacial pour les patients atteints de SAOS, a été mis en œuvre à l’initiative de Marc Richard Moeller. Les deux premières étapes du consensus de recommandations Delphi sont achevées. La troisième étape, consacrée à l’élaboration du questionnaire aura lieu lors de la réunion conjointe de la World Sleep Society et de l’Academy of Applied Myofunctional Sciences, en mars 2022 à Rome. Les conclusions du consensus de recommandations Delphi seront publiées l’année suivante et largement diffusées.
Experimental analysis and optimization of mechanical properties of FDM-processed polylactic acid using Taguchi design of experiment
Authors: Abouelmajd Mohamed , Bahlaoui Ahmed , Arroub Ismail , Zemzami Maria , Hmina Nabil , Lagache Manuel , Belhouideg Soufiane
Published: November 2021

Fused deposition modeling (FDM) is one of the most used additive manufacturing processes in the current time. Predicting the impact of different 3D printing parameters on the quality of printed parts is one of the critical challenges facing researchers. The present paper aims to examine the effect of three FDM process parameters, namely deposition velocity, extrusion temperature, and raster orientation on the bending strength, stiffness, and deflection at break of polylactic acid (PLA) parts using Taguchi design of experiment technique. The results indicate that the temperature has the highest impact on the mechanical properties of PLA specimens followed by the velocity and the orientation. The optimum composition offering the best mechanical behavior was determined. The optimal predicted response was 159.78 N, 39.92 N/mm, and 12.55 mm for the bending strength, bending stiffness, and deflection at break, respectively. The R2 obtained from analysis of variance (ANOVA) showed good agreement between the experimental results and those predicted using a regression model.
Das Bindegewebe und sein Aufbau
Authors: Corts Magga
Published: November 2021

Das Bindegewebe agiert mit seinen Fasern als verbindendes Gewebe und liegt als Gleit-, Verschiebe- beziehungsweise Reserveschicht zwischen verschiedenen Organen und Körperstrukturen vor. Es besteht Bindegewebszellen und der Extrazellulärmatrix.
Wieder zu Kräften kommen
Authors: März Henrike
Published: November 2021

Infolge von Erkrankungen kann es zu ungewolltem Gewichtsverlust und Nährstoffmängeln kommen. Eine gezielte, individuelle Kostzusammenstellung im Hinblick auf die Energie- und Nährstoffdichte kann die Vitalität steigern. In der Praxis haben sich in der Aufbaukost Kraftsuppen, nährende Breie, hochwertiges Eiweiß und vitaminreiche Frischkost bewährt.
Die Postur – Aufrichtung gegen die Schwerkraft
Authors: Delarue Cyril André
Published: November 2021

Die Postur (Körperhaltung) des Menschen wird bereits im Mutterleib und in den ersten Lebensmonaten als Säugling entscheidend mitgeprägt. Eine besondere Rolle spielen hier die die Füße. Schuhwerk bereits im Kleinkindalter, aber auch viele andere altersunabhängige Faktoren können sich auf Postur und Bewegungsmuster unphysiologisch auswirken und so zu Läsionen führen – mit Folgen wie Schmerzen und Bewegungseinschränkungen. Als Behandlungsansatz wird der Joint-to-joint-Ansatz vorgestellt, der besagt, dass ein Gelenk oder eine gelenknahe Struktur in Dysfunktion selten die eigentliche Ursache darstellt. Häufig ist diese in den Strukturen darunter oder darüber zu finden.
Research on the triggering process of a laser-triggered vacuum switch
Authors: He Zhenghao , Liu Yuchen , Xin Yinan
Published: November 2021

The laser-triggered vacuum switch (LTVS) is a type of high-voltage closing switch with broad application prospects in pulsed-power technology. Research into the triggering process of the LTVS is not only helpful to understand the triggering mechanism of the LTVS but also beneficial to the optimization of the LTVS. In this paper, the triggering process and the delay time of a LTVS with a Ti–KCl mixture target was analyzed theoretically. A numerical simulation was performed to describe the laser-target ablation process and the expansion dynamics of the initial plasma. The simulation results were compared with the experimental results. It is clear that the triggering process and delay time strongly depend on the laser intensity. As the laser intensity rises, the velocity of initial plasma increases, resulting in a shorter delay time of the LTVS. Increasing the gap voltage can also shorten the delay time.
Some thoughts on (the acquisition of) control
Authors: Santos Ana Lúcia
Published: November 2021

This paper discusses the subject / object control asymmetry in child language acquisition. Based on data reflecting the acquisition of European Portuguese, I argue that children do not have an initial absolute preference for object control and that not only subject control but also object control structures show developmental effects. This argues against analyses which assume that children are initially guided only by syntactic principles that preclude a non-local controller. Even though not excluding a syntactic bias that may favour object control, the acquisition data reviewed in this paper show that lexical acquisition has a larger role in the acquisition of control structures than is often assumed.
L1 effects in the L2 acquisition of long-distance binding in European Portuguese
Authors: Fiéis Alexandra , Madeira Ana
Published: November 2021

This paper examines the acquisition, by Spanish and Italian speakers, of the binding properties of the long-distance reflexive si in European Portuguese in indicative and subjunctive contexts, addressing the following research questions: (i) Do learners transfer knowledge of the binding properties of the equivalent reflexive in their L1? (ii) Do they develop knowledge of the binding properties of the reflexive? Despite the fact that Spanish and Italian reportedly differ in the availability of long-distance binding (Napoli, 1979; Otero, 1999), our results from a study on native speakers of both languages, using a picture selection task, showed a significant preference for local binding. Findings from a truth-value judgement task applied to Spanish- and Italian-speaking learners of L2 European Portuguese are reported: both learner groups show a preference for local binding but follow different developmental paths. The results also indicate delays in the development of the relevant knowledge of long distance reflexives.
Deriving scalar implicatures with quantifiers by Romanian children
Authors: Bleotu Adina Camelia
Published: November 2021

The present study looks at whether 7–9-year-old Romanian monolingual children generate fewer implicatures than adults (Noveck, 2001) when interpreting two existential plural quantifiers (unii ‘some1’ and cȃţiva ‘some2’). The results reveal that 7-year-olds derive scalar implicatures with existential quantifiers less frequently than 9-year-olds, who, in turn, derive them less frequently than adults. Moreover, subjects behaved the same with unii ‘some1’ and cȃţiva ‘some2’, i.e., the semantic differences between the two existential quantifiers seem to be immaterial to scalarity computation.
A lexical resource for computational historical
linguistics*
Authors: Adesam Yvonne , Lilja Peter Andersson , Borin Lars , Bouma Gerlof
Published: November 2021

In this chapter we present the diachronic
dimension of Swedish FrameNet++. We describe the historical lexical
resources currently available for Swedish, linked to the
Contemporary Swedish lexicon Saldo. We present a case study of how
interlinking the dictionaries simultaneously allows us to study
lexical change. We also present a method of linking text words to
lexicon entries, facilitating interactive exploration of historical
texts. Diachronical language resources present both a high-variation
challenge from a wider language technology perspective, and an
interesting object of linguistic study. While a number of
improvements of the parts of the diachronic lexical macroresource
are still needed, this resource is invaluable for analysing and
accessing historical texts, as well as for both synchronic
historical and diachronic lexical studies.
A multilingual net of lexical resources
Authors: Lindén Krister , Niemi Jyrki , Borin Lars , Forsberg Markus , Pedersen Bolette S. , Nimb Sanni , Orav Heili , Kahusk Neeme , Vider Kadri
Published: November 2021

In this chapter, we explore how to develop and
encode the relationship between wordnets for different languages
using some Nordic and Baltic wordnets to illustrate the variety of
approaches. We also briefly touch on how these wordnets have been
enhanced or augmented with various types of lexical information,
such as framenet frames as well as syntagmatic and sentiment
information.
Swedish FrameNet++ and comparative linguistics*
Authors: Borin Lars , Saxena Anju , Virk Shafqat Mumtaz , Comrie Bernard
Published: November 2021

In this chapter we describe a multilingual
extension of Swedish FrameNet++, intended to address research
questions of a broad comparative nature, in genealogical, areal and
typological linguistics, focusing on the integration into Swedish
FrameNet++ of so-called core vocabularies, used in several
linguistic subfields in order to conduct massive comparative studies
involving large numbers of languages. Specifically, we describe the
inclusion of two such lexical databases covering several hundred
South Asian languages, with the aim of investigating areal and
genealogical connections among these languages.
A register variation perspective on varieties of English
Authors: Neumann Stella , Evert Stefan
Published: November 2021

This chapter reports an exploration of dimensions of register variation across varieties of English. We
analyse 2,844 texts from the Hong Kong, Jamaica and New Zealand components of the International Corpus of
English, using its text categorization scheme as a frame of reference. We apply Geometric Multivariate Analysis,
an interactive procedure for exploring latent structure in language variation, based on the frequencies of 41
lexico-grammatical features informed by systemic functional register theory. Visual inspection of the distribution of texts
across the multidimensional space reveals continuities between groups of texts as well as dimensions of variation that can be
related to theoretical register constructs. We also observe differences between the three ICE components (and their text
categories) in register space.
Register and modification in the noun phrase
Authors: Botha Yolande , van Zyl Maryka
Published: November 2021

Our study differs from previous studies on the relation between modifiers in the noun phrase and register
in that we do pairwise comparisons of ten registers based on the frequency of a modifier form relative to the number of nouns
in the register. Using effect size to measure the differences between any two registers, we find that the largest
interregister differences correspond to distinctions made in previous multi-dimensional studies. Registers with high
proportions of premodifiers tend to be informational and differ most from registers that are more ‘oral-involved’. Large
differences in postnominal phrases and non-finite clauses correspond to the information-narrative distinction.