Anatomical Evaluation of Root and Root Canal Configuration of Permanent Maxillary Dentition in the Population of the Kingdom of Saudi Arabia

Aim. This study is aimed at combining the sample sizes of all studies on permanent maxillary teeth conducted in different regions of the Kingdom of Saudi Arabia (KSA) to obtain a large sample size that represents the population of the KSA. The outcome of these combined studies is compared with international studies in terms of the number of roots, number of canals, and canal configurations on the basis of Vertucci’s classification. Methodology. The studies were systematically reviewed using the Preferred Reporting Items for Systematic Review and Meta-analysis chart. Studies were included in the analysis if they were conducted in the KSA, involved permanent human maxillary teeth, and had a sample of more than 10 teeth (power). By contrast, studies were excluded if they involved deciduous teeth in the sample size, investigated nonhuman teeth, were not conducted in the KSA, and were case reports, case series, review studies, and anomalies. Relevant literature was searched from PubMed, Scopus, Web of Science, Embase, Cochrane, and Direct Science by two calibrated teams, starting in August 2020, without time limits or language restrictions. Results. The database searches and cross-referencing identified a total of 19 relevant studies. All maxillary canines ( N = 1,018 ) had one root, whereas 98.4% had one canal and 98.3% had Vertucci type I. Moreover, 63.2% of the maxillary first premolars had two roots, and 91.4% had two canals. The most common Vertucci root canal configuration was type IV (64.6%). The maxillary second premolars mostly had one root (84.4%) and one canal (50.4%). The most common canal configuration was Vertucci type I (47.1%). The majority of maxillary first molars had three roots (98.9%), 48.7% of which had three canals, and 46.4% had four canals. The most prevalent feature of the canal morphology of mesiobuccal roots was Vertucci type II (35.3%). The investigated maxillary second molars had three roots, 88.0% of which had three canals. Conclusion. This systematic review represents the Saudi population since samples were combined from different studies from different regions of the country. Variations in findings were observed in the same group of teeth from different regions and the same region, while the overall combined samples results fell within the range of other international studies.

Causes and consequences of psychological stress in the working life and emergency services of veterinary professionals in the Federal Republic of Germany: A protocol for a nationwide cross-sectional study

Background: Veterinarians are exposed to high workloads. International studies show they have an above-average risk of suicide and burnout. Hardly any studies dealing with causes and consequences of workload and emergency services are available in Germany. Methods: The aim of the observational cross-sectional study presented here is to assess their workloads and working conditions (Slesina questionnaire), health situation and well-being (KÖPS questionnaire - physical, psychological and social symptoms; Maslach Burnout Inventory MBI-GS; WHO-5 well-being index), as well as occupational psychological aspects (irritation scales; overcommitment; questionnaire on work-related behavior and experience patterns AVEM) which will be recorded and analyzed according to general sociodemographic and occupational data (sector-, gender, assignment- and country-specific). In addition, the heart rate variability of some members of the veterinary profession will be analyzed using 24 hour electrocardiogram recordings, which together with the subjective insights into the stress situation from the questionnaires, will allow objective psychophysiological stress analyses. Conclusions: The results of the study will provide further empirical insights into the workloads and stresses faced by the veterinary profession in Germany, based on which important insights into this professional group’s mental health can be identified. In this way, it should be possible to identify (mis)stress-triggering factors in the target groups, derive target group-specific recommendations for health-promoting work design, and identify approaches to veterinary studies and career selection.

Improving Information Interaction between the Metallurgical Plant and Rail Operators

The current situation of development of the world economy presupposes intense competition in both external and internal markets. Under these conditions, it becomes more and more obvious that the growth of profits and, accordingly, further development of companies will be carried out not so much through expansion, but through improved service for customers, an increase in the range of goods and services offered, a better product quality and a decrease in production costs.The main role in optimisation of technological processes is currently played by digital transformation of production. The introduction of advanced information technologies is of great importance for all global companies, since the enhanced development of information systems results in improvement of business processes, better safety, and environmental friendliness.International studies show that the use of modern information technologies in transport industry is necessary to improve traffic safety, reduce environmental impact, increase the efficiency of the transportation process.The Russian mining and metallurgical sector, along with the oil and gas industry, makes a significant contribution to development of the country. Complex production technology, a large volume of traffic, hazardous and dangerous working conditions for personnel necessitate development of a digital environment to increase labour productivity and the volume of products.The objective of the research is to study the possibility of using information control and forecasting systems for solving technical, technological, and organisational problems of industrial railways of metallurgical plants.Based on comparative analysis, general scientific and mathematical research methods and the study of the role of information systems in digital transformation of production process, the authors suggest a methodology for creating a stochastic model for predicting the arrival of unit trains at an enterprise, and consider development trends in digital transformation of industrial transport.

The Agro-Waste Production in Selected EUSAIR Regions and Its Potential Use for Building Applications: A Review

The purpose of this study is to provide a snapshot of the agro-waste production in Puglia, Molise, Albania and Montenegro, some of the regions belonging to EUSAIR (ADRIATIC-IONIAN REGIONS) correlating this aspect to the possible use of agro-waste in the building sector. EUSAIR is a functional area, facing the Adriatic sea, treating the marine, coastal and terrestrial areas as interconnected systems. In the first part of the paper, the state of the art about the current consumption of agricultural biomass is carried out referring to the ongoing research lines. It was shown that a great number of international studies have demonstrated that the agro-waste plays an important role in several fields. Moreover, several researchers conducted studies on hygrothermal, physical and acoustical properties of building materials made with biomass proving the potentiality to use this kind of by-product. Then, the state of the art regarding the production and current way of disposal of the agro-waste in the regions of the EUSAIR above mentioned was performed in order to outline the possible by-products which are suitable to be re-used in the building sector. The correlation existing between the agro-waste and the possible use in the building sector is finally presented, focusing on the legislative framework currently existing in each of the regions.

Clinical Utility of Oncuria™, a Multiplexed Liquid Biopsy for the Non-Invasive Detection of Bladder Cancer—A Pilot Study

Oncuria™ is a validated quantitative multiplex immunoassay capable of detecting bladder cancer from a voided urine sample. Herein, we sought to determine whether Oncuria™ affects physicians’ use of non-invasive and invasive diagnostic tests for microhematuria, gross hematuria, and bladder cancer surveillance. We conducted a survey-based study to assess physician management of nine clinical scenarios involving real-world data from patients with gross hematuria, microhematuria, and bladder cancer on surveillance. We randomly sampled 15 practicing urologists and generated data including 135 patient-by-urologist interactions and 2160 decision points. Urologists recommended a selection of diagnostic tests and procedures before and after Oncuria™ results were provided. We assessed changes in provider use of non-invasive and invasive diagnostic tests after Oncuria™ results were provided. Over 90% of all urologists changed their diagnostic behavior in at least one patient case with the addition of Oncuria™ results. The total number of diagnostic procedures was reduced by 31% following the disclosure of a negative Oncuria™ test and 27% following the disclosure of a positive Oncuria™ test. This is pilot study has the potential to shed light on the analysis of our four large multicenter international studies deploying OncuriaTM. The Oncuria™ urine-based test, a molecular diagnostic capable of ruling out the presence of bladder cancer, reduces both unnecessary invasive and non-invasive diagnostics and has the potential to reduce costs and improve patient outcomes.

Influences of Climate Change and Variability on Estuarine Ecosystems: An Impact Study in Selected European, South American and Asian Countries

It is well-known that climate change significantly impacts ecosystems (at the macro-level) and individual species (at the micro-level). Among the former, estuaries are the most vulnerable and affected ecosystems. However, despite the strong relations between climate change and estuaries, there is a gap in the literature regarding international studies across different regions investigating the impacts of climate change and variability on estuaries in different geographical zones. This paper addresses this need and reviews the impacts of climate change, variability and extreme weather on estuaries. It emphasises the following: (i) a set of climate parameters governing estuarine hydrology and processes; and (ii) a sample of countries in Asia (Bangladesh), Europe (Portugal) and South America (Uruguay). We reviewed the influences of the climatic drivers of the estuarine hydrology, ecological processes and specific species in estuarine communities across the selected geographical regions, along with an analysis of their long-term implications. The key results from the three estuaries are as following: (i) Hilsa fish, of which the catches contribute to 10% of the total earnings of the fishery sector (1% of GDP), are affected by climate-forced hydrological and productivity changes in the Meghna; (ii) extreme droughts and short-term severe precipitation have driven the long-term abundance and spatial distribution of both fish larvae and juveniles/adults in the Mondego; and (iii) the river inflow and fluctuations increases since the early 1970s have contributed to variations in the salinity, the stratification, the oxygen, nutrient and trophic levels and the spatial pattern for the life stages of planktonic species, fish biomass and captures in the Rio de la Plata. The results suggested that immediate action is needed to reduce the vulnerability of estuaries to climate stressors, mainly the changing river flows, storms and sea-level rise. As a contribution to addressing current problems, we described a set of adaptation strategies to foster climate resilience and adaptive capacity (e.g., early-warning systems, dam management to prevent overflows and adaptive fisheries management). The implications of this paper are two-fold. Firstly, it showcases a variety of problems that estuaries face from changing climate conditions. Secondly, the paper outlines the need for suitable adaptive management strategies to safeguard the integrity of such vital ecosystems.

Large-Scale Transport Projects: Accuracy in Cost Estimation

Currently, several studies have been conducted about overspending of funds in large-scale projects, including transport. International studies show that overspending by 20–100 % is not an exception, but an established fact. The article presents the results of comparing the estimated cost with the actual costs for several large-scale transport projects that were implemented on the territory of Russia. The conclusion is made about the need for a systematic analysis when evaluating the effectiveness of projects of this class.

Faculty of Political Science and International Studies, University of Warsaw

This article deals with the visit of the Belgian Queen Elisabeth to Poland in 1955. The monarch was to be the honorary guest of the Fifth International Chopin Competition. The queen used the opportunity to carry out a diplomatic mission, attempting to resolve issues that negotiations between Brussels and Warsaw failed to disentangle. This article analyses the mission and its political consequences for mutual relations between the two countries.

Management Game

Digital disruption and continuous productivity improvement require more from people management, thus raising the bar for leadership competencies. International studies indicate that leadership competence gaps are large and traditional leadership training methods does not seem to solve this problem. This article's findings supports this situation. The authors will open the complexity behind organizational productivity development and present game theoretical architecture that simulates management behavior effects to human performance. New methods enable practice-based learning that enables formatting leaders' behavior so that it will create long-term success with continuous change. The authors will present gamified leadership training procedure and discuss the practical learning experiences from a management simulation game. The authors' study reveals challenges at interactive leadership skills, thus, it is argued, that there seems to be problems at the leadership mind-set. Therefore, more sophisticated learning methods and tools should be used.

Outcome of laparoscopic cholecystectomy in terms of intraoperative complications in a tertiary care hospital.

Objectives: The main objective was to evaluate the outcome of laparoscopic cholecystectomy in terms of intra-operative complications and the rate and reasons of conversion to open cholecystectomy. Study Design: Descriptive Study. Setting: Hayatabad Medical Complex, Peshawar. Period: June 2018 to May 2019. Material & Methods: After taking consent of Hospital ethical & research committee, patients admitted with clinical diagnosis of cholelithiasis and chronic cholecystitis, confirmed by abdominal ultrasound, undergoing laparoscopic cholecystectomy fulfilling inclusion criteria were selected. Results: A total of 150 were included in the study. Mean age was 39.2yrs with female to male ratio of 9.75:1. Laparoscopic cholecystectomy was successfully accomplished in 98% cases. In 2% (3 patients) converted cases the most common cause of conversion observed was dense adhesions in the calots triangle. Intra-operative complications were noted in 1.4% patients, those included bile duct injury and leakage from the gallbladder bed. However other complications such as bowel injury, blood vessel injury, and post operative hemorrhage did not occur. Overall morbidity was 1.4% with no mortality. Conclusion: Laparoscopic cholecystectomy is a safe and effective procedure in our setup to the accepted standards, as evident by the national and international studies. And it can be accomplished with minimal morbidity and low rate of conversion with the increasing surgeon’s experience.