Costs and concerns

Photovoltaic energy sources are increasingly in demand due to the cost of petroleum fuels and concerns about carbon emissions. For this reason, it is important to determine the photovoltaic properties of the compounds that are thought to be suitable for these energy sources. Here, 1,1,2,3,4,5-Hexaphenyl-1H-silole (HPS) and 1,1,2,3,4,5-Hexaphenyl-1H-germole (HPG) compounds that are thought to have excellent photovoltaic properties, electronic and charge transport properties were investigated experimentally and theoretically.

13p lyhuyenthu 31-01-2023 1 1   Download

The composites based on bio-fillers and polymers have attracted great interest due to increasing environmental concern, their low cost and renewable resource. In this study, the dynamic mechanical thermal and thermomechanical characterizations of polyolefin (Polypropylene – PP and polyethylene - PE) as well as three composite systems including rice husk (RH) filled polypropylene composite, rice husk filled polyethylene composite and saw dust (SD) filled polyethylene composite were investigated.

4p vilexus 30-09-2022 7 1   Download

Studying on transportation e-marketplaces (TEMs) has today received much concern because developing TEMs helps enterprises and their customers reduce operation costs and improve supply chain efficiency. This study evaluates the adoption of TEMs in Vietnam based on the demand side’s perspective, including the viewpoint of shippers and the Transport Service Providers (TSPs).

15p viaudi 29-08-2022 3 1   Download

Geostatistics is briefly concerned with estimation and prediction for spatially continuous phenomena, using data measured at a finite number of spatial locations to estimate values of interest at unmeasured locations. In practice, the costs of installing new observational stations to observe metropolitan water pollution sources, as DO (Dissolvent Oxygen), COD (Chemical Oxygen Demand) and BOD (Biochemical oxygen Demand) concentrations are economically high.

11p viaudi 04-08-2022 1 0   Download

One of the most contentious areas in construction claims is the calculation or estimation of lost productivity. Unlike direct costs, lost productivity is often not tracked or cannot be discerned separately and contemporaneously. As a result, both causation and entitlement concerning the recovery of lost productivity are difficult to establish. Compounding this situation, there is no uniform agreement within the construction industry as to a preferred methodology of calculating lost productivity.

30p runordie3 27-06-2022 6 1   Download

Perioperative neurocognitive disorder includes postoperative cognitive dysfunction (POCD) and postoperative delirium (POD). Concerning inconclusive consequences of POCD compared with POD, we explored the association between either POCD or POD and functional decline as well as healthcare utilization.

12p vinobelprisen 26-03-2022 11 2   Download

Mastitis is the most common health concern plaguing the modern dairy cow and costs dairy producers estimates of two billion dollars annually. Staphylococcus aureus infections are prevalent, displaying varied disease presentation and markedly low cure rates.

8p vigandhi 23-02-2022 16 1   Download

Midazolam is a benzodiazepine commonly used in procedural sedation and general anaesthesia. Current anaesthetic guidelines advise the avoidance of benzodiazepines in elderly patients due to concerns of an increased risk of delirium. Delirium is associated with significant patient morbidity and mortality, while also increasing health costs.

7p vidietmarhopp 28-12-2021 8 0   Download

Genome editing technologies have led to fundamental changes in genetic science. Among them, CRISPR-Cas9 technology particularly stands out due to its advantages such as easy handling, high accuracy, and low cost. It has made a quick introduction in fields related to humans, animals, and the environment, while raising difficult questions, applications, concerns, and bioethical issues to be discussed. Most concerns stem from the use of CRISPR-Cas9 to genetically alter human germline cells and embryos (called germline genome editing).

11p thiencuuchu 27-11-2021 5 0   Download

This paper concerns with a problem of supoptimal finite-time control for a class of linear large-scale delay systems. The system under consideration is subjected to the state and control delays interacted between subsystems. Based on improved LMI approach combining with new estimation techniques, we derive sufficient conditions for solving H∞ finite-time control and guaranteed cost control of the system. A numerical example is given to illustrate the validity and effectiveness of the theoretical results.

15p spiritedaway36 25-11-2021 12 0   Download

Lecture Software Engineering - Chapter 1: An Introduction to Software Engineering, objectives: To introduce software engineering and to explain its importance; To set out the answers to key questions about software engineering; To introduce ethical and professional issues and to explain why they are of concern to software engineers.

32p tomjerry005 17-11-2021 3 0   Download

Construction usually involves risks and uncertainty since its complicated operations require huge capital, long time, and intensive labor resources. The cost of construction is always a major concern of owners and contractors. Thus, the ability to accurately forecast future trends in the Construction Cost Index (CCI) is critical for construction cost managers in order to prepare accurate budgets and proper bids.

7p visteveballmer 06-11-2021 9 0   Download

Clostridium perfringens causes a range of diseases in animals and humans including necrotic enteritis in chickens and food poisoning and gas gangrene in humans. Necrotic enteritis is of concern in commercial chicken production due to the cost of the implementation of infection control measures and to productivity losses. This study has focused on the genomic analysis of a range of chicken-derived C. perfringens isolates, from around the world and from different years.

22p vibeauty 23-10-2021 5 0   Download

Appendix A: Pricing products and services. In this appendix, we are concerned with the more common situation in which a business is faced with the problem of setting its own prices. Clearly, the pricing decision can be critical. If the price is set too high, customers won’t buy the company’s products. If the price is set too low, the company’s costs won’t be covered.

25p lovebychance05 16-06-2021 20 0   Download

Low back pain (LBP) is a common and costly problem that many interpret within a biopsychosocial model. There is renewed concern that core-sets of outcome measures do not capture what is important.

14p viannito2711 20-04-2021 6 2   Download

Little is known concerning the degree to which initiation of sildenafil for pulmonary arterial hypertension (PAH) impacts patterns of healthcare utilization and costs. The cost of sildenafil therapy may be partially offset by reductions in other healthcare costs.

8p vianthony2711 16-04-2021 10 1   Download

The objective of this article is to achieve profitable capital investment in a 250 MW coal-fired thermal power plant situated in east part of Tajikistan. In this context, the article applies a mathematical model to estimate the quantitative advantages of coal alternatives. The cost analysis of the plant was carried out on the basis of total capital investment, operating cost (i.e. coal feedstock, maintenance and labour, and cost of pumping power) and revenue.

9p nguaconbaynhay10 22-02-2021 8 2   Download

Beta-lactam antibiotics are the most commonly used antimicrobials against bacterial infections. In recent years, emergence of resistance to these antimicrobial agents due to production of β-lactamases has become a serious global health concern. It was reported as leading cause to ineffectiveness to antibiotic usage, increased morbidity and high cost of treatment. Extended spectrum beta-lactamases (ESBLs) detection amongst the Gram – negative bacilli is considered as an important marker of endemicity.

9p caygaocaolon8 07-11-2020 5 0   Download

Next Generation Genome sequencing techniques became affordable for massive sequencing efforts devoted to clinical characterization of human diseases. However, the cost of providing cloud-based data analysis of the mounting datasets remains a concerning bottleneck for providing cost-effective clinical services.

14p vioklahoma2711 19-11-2020 12 1   Download

Persistent heavy metal pollution poses a major threat to all life forms in the environment due to its toxic effects. These metals are very reactive at low concentrations and can accumulate in the food web, causing severe public health concerns. The use of microbial biosorbents is eco-friendly and cost effective; hence, it is an efficient alternative for the remediation of heavy metal contaminated environments.

17p trinhthamhodang1215 23-09-2020 11 0   Download