Ranking of metallic and non-metallic coatings in the electrochemical surface treatment sector

2021 ◽  
pp. 54-58
Author(s):  
E. G. Vinokurov ◽  
T. F. Burukhina ◽  
I. S. Kuroshev
Keyword(s):  
Surface Treatment ◽  
Correlation Coefficient ◽  
The United States ◽  
Critical Value ◽  
Electrochemical Methods ◽  
Metallic Coatings ◽  
Metal Coatings ◽  
Technical Research ◽  
Priority Areas ◽  
Electrochemical Surface Treatment

The distribution of coatings by the frequency of their application during surface treatment by electrochemical methods is considered. This is important not only for understanding the structure of the electrochemical surface treatment sector, but also for identifying priority areas of scientific and technical research. Nonparametric statistical methods show the uniformity of samples and reveal the relationship between the number of enterprises that sell a certain type of coating, i.e. the frequency of applying a certain type of coating in different countries (USA, Japan, Italy, France, Germany, Great Britain, Spain, Canada, Mexico, Russia, South Africa). The results of testing the hypothesis of a close relationship between the ranks of coatings showed that a significant correlation was found between the distribution of coatings by the frequency of their application (implementation) among all countries. For example, when comparing the United States and Canada, the rank correlation coefficient is 0.62 (the lowest value obtained), which is greater than the calculated critical value of 0.56; when comparing Italy and Spain, the correlation coefficient takes the highest value of 0.97, which is greater than the critical value of 0.19. The results obtained allowed us to use this data to compile a generalized rating of the frequency of use of all coatings based on data from different countries. Based on the analysis, metal coatings can be arranged in a row according to the descending frequency of their application: Cr > Ni > Zn > Cu > Cd. The results of the ranking of coatings showed that the most commonly used electrochemical methods for surface treatment are metal coatings with chromium and nickel, and among the inorganic non – metallic coatings-oxide and then phosphate, which allows us to highlight the research devoted to the application of these coatings as priority areas of scientific and technical research.

An Investigation of the Impact of COVID-19 Pandemic on Energy Consumption in the United States

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Lindsey Kahn ◽  
Hamidreza Najafi
Keyword(s):  
Energy Consumption ◽  
Correlation Coefficient ◽  
Energy Use ◽  
The United States ◽  
Annual Growth Rate ◽  
Total Consumption ◽  
The Usa ◽  
End Use ◽  
The Times ◽  
The Impact

Abstract Lockdown measures and mobility restrictions to combat the spread of COVID-19 have impacted energy consumption patterns. The overall decline of energy use during lockdown restrictions can best be identified through the analysis of energy consumption by source and end-use sectors. Using monthly energy consumption data, the total 9-months use between January and September for the years 2015–2020 is calculated for each end-use sector (transportation, industrial, residential, and commercial). The cumulative consumption within these 9 months of the petroleum, natural gas, biomass, and electricity energy by the various end-use sectors are compared. The analysis shows that the transportation sector experienced the greatest decline (14.38%). To further analyze the impact of COVID-19 on each state within the USA, the consumption of electricity by each state and each end-use sector in the times before and during the pandemic is used to identify the impact of specific lockdown procedures on energy use. The distinction of state-by-state analysis in this study provides a unique metric for consumption forecasting. The average total consumption for each state was found for the years 2015–2019. The total average annual growth rate (AAGR) for 2020 was used to find a correlation coefficient between COVID-19 case and death rate, population density, and lockdown duration. A correlation coefficient was also calculated between the 2020 AAGR for all sectors and AAGR for each individual end-user. The results show that Indiana had the highest percent reduction in consumption of 10.07% while North Dakota had the highest consumption increase of 7.61%. This is likely due to the amount of industrial consumption relative to other sectors in the state.

scholarly journals Predisposing factors to lateral ankle injury in male comrades marathon runners

2009 ◽  
Vol 65 (1) ◽  
Author(s):  
J. Hiemstra ◽  
N. Naidoo
Keyword(s):  
Correlation Coefficient ◽  
Undergraduate Research ◽  
The United States ◽  
Ankle Injury ◽  
Ankle Injuries ◽  
Distance Runners ◽  
Marathon Runners ◽  
Lateral Ankle ◽  
Ankle Ligament ◽  
Lateral Ankle Ligament

Introduction: More than two million people experience ankle ligament traumaeach year in the United States. Half of these are severe ligament sprains, however verylittle is known about the factors that predispose individuals to these injuries. The purpose of this study, (which was conducted as an undergraduate research project),was to find a correlation between the characteristics of height, weight and limbdominance and lateral ankle ligament injuries. Method: A  retrospective study was conducted on 114 ultra distance runners whoparticipated in the 2006 Comrades Marathon. During race registration, the runners’ height and weight were measuredafter answering a questionnaire regarding their training. Results: 114 runners responded to the questionnaire. From this cohort, 38 (33.3%) had sustained previous lateral ankle injuries. Of these 38 injuries, 47.4% of the injuries occurred on the runner’s dominant limb and 36.8% occurred on thenon-dominant side. 15.8% of the runners sustained previous ankle injuries to both ankles. There was a low negative correlation coefficient of 0.24 with regards to weight as a risk factor. This indicated that the power of the correlationwas 5.93%. The study demonstrates that there is no correlation between an increase in weight and an increase in theincidence of ankle injury. The correlation coefficient indicated a low correlation between an increase in height and the incidence of ankle injury. However, the power of the correlation at 18.37% makes inaccurate any attempt to predict the height at which a runner would be at most risk for lateral ankle injury. Conclusion: Height and weight are not risk factors predisposing subjects to lateral ankle injury. In addition, the studyillustrated that there was no effect of limb dominance on the incidence of lateral ankle injury.

Perceived Discrimination and Health: Integrative Findings

2018 ◽  
pp. 442-456 ◽  
Author(s):  
Adolfo G. Cuevas ◽  
David R. Williams
Keyword(s):  
United States ◽  
Health Outcomes ◽  
National Health ◽  
Perceived Discrimination ◽  
Social Groups ◽  
The United States ◽  
Health Study ◽  
Future Research ◽  
Priority Areas

The Midlife in the United States (MIDUS) study was the first national health study to include a comprehensive battery to measure both major acute and chronic experiences of discrimination. Studies using MIDUS data have made significant contributions to the growing area of research on discrimination and health. This chapter provides an overview of research on discrimination and health, giving special attention to how findings from the MIDUS study have contributed to this literature. It provides a description of the discrimination instruments in MIDUS and summarizes key MIDUS findings that have examined discrimination in relation to health outcomes. This chapter outlines priority areas for future research. With growing recognition of the need to better understand the conditions under which specific aspects of discrimination are pathogenic for particular social groups, this chapter highlights the importance of using MIDUS to reach these goals.

scholarly journals Delivering on Biden’s 2030 conservation commitment

2021 ◽  
Author(s):  
B. Alexander Simmons ◽  
Christoph Nolte ◽  
Jennifer McGowan
Keyword(s):  
United States ◽  
Performance Metrics ◽  
Clean Energy ◽  
The United States ◽  
Conservation Strategies ◽  
Climate Mitigation ◽  
Executive Order ◽  
Conservation Action ◽  
Priority Areas ◽  
Trade Offs

AbstractOn January 27, 2021, President Biden signed an executive order, Tackling the Climate Crisis at Home and Abroad, committing the United States to various goals within his campaign’s major climate policy, the Biden Plan for a Clean Energy Revolution and Environmental Justice. Included in this executive order is a commitment to “conserving at least 30 percent of [the United States’] lands and oceans by 2030.” This ambitious conservation target signals a promising direction for biodiversity in the United States. However, while the executive order outlines several goals for climate mitigation, the ‘30×30’ target remains vague in its objectives, actions, and implementation strategies for protecting biodiversity. Biodiversity urgently needs effective conservation action, but it remains unclear where and what this 30% target will be applied to. Achieving different climate and biodiversity objectives will require different strategies and, in combination with the associated costs of implementation, will lead to different priority areas for conservation actions. Here, we illustrate what the 30% target could look like across four objectives reflective of the ambitious goals outlined in the executive order. We compile several variations of terrestrial protected area networks guided by these different objectives and examine the trade-offs in costs, ecosystem representation, and climate mitigation potential between each. We find little congruence in priority areas across objectives, emphasizing just how crucial it will be for the Biden administration to develop clear objectives and establish appropriate performance metrics from the outset to maximize both conservation and climate outcomes in support of the 30×30 target. We discuss important considerations that must guide the administration’s conservation strategies in order to ensure meaningful conservation outcomes can be achieved over the next decade.

Control of Listeria monocytogenes on Cooked Cured Ham by Formulation with a Lactate-Diacetate Blend and Surface Treatment with Lauric Arginate

2010 ◽  
Vol 73 (3) ◽  
pp. 552-555 ◽  
Author(s):  
J. D. STOPFORTH ◽  
D. VISSER ◽  
R. ZUMBRINK ◽  
L. van DIJK ◽  
E. W. BONTENBAL
Keyword(s):  
United States ◽  
Surface Treatment ◽  
Meat Products ◽  
Growth Inhibitor ◽  
Antimicrobial Effect ◽  
The United States ◽  
Complete Inhibition ◽  
Department Of Agriculture ◽  
Lauric Arginate ◽  
Inspection Service

Ready-to-eat (RTE) meat products have been identified as a significant source of listeriosis in humans in the United States. Meat processors in the United States are required to use one of three alternatives to control L. monocytogenes in RTE meats: (i) a postlethality inactivation treatment along with a L. monocytogenes growth inhibitor; (ii) a postlethality inactivation treatment or a growth inhibitor; or (iii) sanitation measures and intensive testing. Lauric arginate (LAE) has been proposed as an effective postlethality inactivation treatment. The present study was conducted to investigate the antimicrobial effect of a lactate-diacetate blend in the formulation combined with surface application of LAE on cooked cured ham inoculated with L. monocytogenes, vacuum packaged, and stored at 4°C for up to 90 days. The treatments evaluated were (i) control ham with no added antimicrobials (control); (ii) ham formulated with 1.68% potassium lactate and 0.12% sodium diacetate (PLSD); (iii) control ham with 0.07% LAE as a surface treatment (LAE); and (iv) ham formulated with PLSD and LAE surface treatment (sprayed in bag and distributed across meat surface during vacuum packing) (PLSD+LAE). Use of only LAE as a surface treatment resulted in an initial 1-log CFU/g reduction in levels of L. monocytogenes on ham; however, this reduction only delayed the growth of the pathogen to 8 log CFU/g by 12 days when compared with the control ham without added antimicrobials. Use of PLSD in the formulation of ham resulted in a complete inhibition of L. monocytogenes throughout storage. The combination of PLSD in the formulation and a surface treatment with LAE resulted in an initial 0.7-log CFU/g reduction of the pathogen on ham and complete inhibition of the pathogen at the reduced level throughout storage. Formulation of ham with a lactate-diacetate blend combined with lauric arginate as a surface treatment will allow RTE meat processors to effectively achieve alternative 1 status, as designated by the U.S. Department of Agriculture Food Safety and Inspection Service, in their facilities.

Intense Ion-Beam Treatment of Materials

MRS Bulletin ◽  
1996 ◽  
Vol 21 (8) ◽  
pp. 58-62 ◽  
Author(s):  
Harold A. Davis ◽  
Gennady E. Remnev ◽  
Regan W. Stinnett ◽  
Kiyoshi Yatsui
Keyword(s):  
Energy Density ◽  
Surface Treatment ◽  
Laser Processing ◽  
Beam Energy ◽  
Ion Beam ◽  
The United States ◽  
High Energy ◽  
High Energy Density ◽  
X Rays ◽  
Near Surface

Over the past decade, researchers in Japan, Russia, and the United States have been investigating the application of intense-pulsed-ion-beam (IPIB) technology (which has roots in inertial confinement fusion programs) to the surface treatment and coating of materials. The short range (0.1–10 μm) and high-energy density (1–50 J/cm2) of these short-pulsed (t ≥ 1 μs) beams (with ion currents I = 5–50 kA, and energies E = 100–1,000 keV) make them ideal flash-heat sources to rapidly vaporize or melt the near-surface layer of targets similar to the more familiar pulsed laser deposition (PLD) or laser surface treatment. The vaporized material can form coatings on substrates, and surface melting followed by rapid cooling (109 K/s) can form amorphous layers, dissolve precipitates, and form nonequilibrium microstructures.An advantage of this approach over laser processing is that these beams deliver 0.1–10 KJ per pulse to targets at expected overall electrical efficiencies (i.e., the ratio of extracted ion-beam energy to the total energy consumed in generating the beam) of 15–40% (compared to < 1% for the excimer lasers often used for similar applications). Consequently IPIB hardware can be compact and require relatively low capital investment. This opens the promise of environmentally conscious, low-cost, high-throughput manufacturing. Further, efficient beam transport to the target and excellent coupling of incident ion energy to targets are achieved, as opposed to lasers that may have limited coupling to reflective materials or produce reflecting plasmas at high incident fluence. The ion range is adjustable through selection of the ion species and kinetic energy, and the beam energy density can be tailored through control of the beam footprint at the target to melt (1–10 J/cm2) or to vaporize (10–50 J/cm2) the target surface. Beam pulse durations are short (≥ 1 μs) to minimize thermal conduction. Some disadvantages of IPIB processing over laser processing include the need to form and propagate the beams in vacuum, and the need for shielding of x-rays produced by relatively low-level electron current present in IPIB accelerators. Also these beams cannot be as tightly focused onto targets as lasers, making them unsuitable for applications requiring treatment on small spatial scales.

scholarly journals IRAN’S GLOBAL POWER FORM FROM THE PERSPECTIVE OF IRAN AND TURKEY ALONG WITH THE GEOPOLITICAL AXIS OF ARABIC SPRING

2020 ◽  
pp. 7-21
Keyword(s):  
United States ◽  
Foreign Policy ◽  
Middle East ◽  
Central Asia ◽  
The United States ◽  
Critical Value ◽  
The West ◽  
The Caucasus ◽  
Global Power

After the 1990, it is very important that in the immediate vicinity of the geopolitical changes that have occurred in Turkey. The first changes is Iran and Iraq on the edge. Especially the Turkey-Iran and Iraq, all kinds of geopolitical developments occurring in the triple border, to a critical value. Because the triple border Iran and Iraq by Turkey as a safety check. For this reason, has become the center of all kinds of illegal developments. Iran, conducts a policy of asymmetric after 1990, in the Caucasus, and the Middle East and Central Asia geography. This policy from time to time an anti-U.S. hostility toward the West and exacerbate. The attitude of the West and the United States due to the foreign policy of Turkey's neighbor Iran rather problematic periods. Because the entire Middle East and Central Asia, Turkey's policies on Iran, which is a pretty effective. For this reason, Iran, Turkey is a country that needs to be analyzed by far the best.

scholarly journals (231) Correlation of Cluster Number and Tendril Density in Grapevines

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1008C-1008
Author(s):  
Peter Cousins
Keyword(s):  
Correlation Coefficient ◽  
The United States ◽  
Indirect Selection ◽  
Yield Component ◽  
Cluster Number ◽  
Density Correlation ◽  
Primary Yield ◽  
National Plant Germplasm System ◽  
The Mean ◽  
Selection For

The grapevine shoot has a zone in which leaf-opposed clusters are found at the nodes. Beyond the cluster zone, leaf-opposed tendrils are borne at the nodes in a patterned distribution. Cluster number is a primary yield component and selection programs for increasing yield in grapevine frequently consider cluster number. However, selection for increased cluster number requires direct observation, which is only possible once the vine matures. Clusters and tendrils are developmentally related, so it may be that tendril density (tendrils per node) reflects cluster number. In contrast to cluster number, tendril density can be observed on plants of all ages. The hypothesis that tendril density is related to cluster number was tested here. Cluster numbers and tendril density were assessed on 10 primary shoots each of 180 grapevine (Vitis) accessions. The accessions analyzed are cultivars and wild species collections held in the United States National Plant Germplasm System. The correlation coefficient of the number of clusters and tendril density was calculated using the means of 10 observations per accession. Tendril density was determined by calculating the mean number of tendrils per node in the nodes beyond the cluster zone. Cluster number and tendril density were positively correlated; the correlation coefficient was 0.35. This implies that vines with more tendrils per node also tend to have more clusters. The positive correlation of cluster number and tendril density has implications for grapevine improvement, pointing to the possibility of indirect selection for higher cluster number through selection for higher tendril density. Correlation between juvenile tendril density and mature cluster number is yet to be tested.

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