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FLORESTA ◽  
2022 ◽  
Vol 52 (1) ◽  
pp. 189
Author(s):  
Juliano Araujo Stadler ◽  
Eduardo Da Silva Lopes ◽  
Carla Krulikowski Rodrigues ◽  
Felipe Martins De Oliveira ◽  
Carlos Cézar Cavassin Diniz

The increased demand for several forest products makes it necessary to apply different management regimes in forest stands, which may influence the wood harvesting operations. This study aimed to evaluate the effect of average individual tree volumes obtained through different management regimes on harvester productivity and costs, thereby enabling to generate information for forest managers. The study was carried out in three Pinus taeda L. stands under clear cutting with different average individual tree volumes (AIV): I (0.367 m3); II (0.582 m3); and III (0.766 m3). Working cycle times, productivity per productive machine hour, energy yield and production costs were obtained by a time and motion study, in which the average values obtained were compared by the Tukey-Kramer test (α ≤ 0.05). The work elements of the harvester’s work cycles were affected by forest management regimes, mainly the movement and the processing, with significant statistical difference between stands, but no difference between total working cycle times. The management regime applied to forest stands influenced the spacing and whole trunk volume which consequently increased the average productivity of the machine from 36.8 to 74.1 m³ per productive machine hour in treatments I and III, respectively, and reduced production costs by 50%. The forest management regimes influenced the clear-cutting operation with harvester.


2021 ◽  
Vol 14 (4) ◽  
pp. 103-113
Author(s):  
A. N. Barkovsky ◽  
Ruslan R. Akhmatdinov ◽  
Rustam R. Akhmatdinov ◽  
N. К. Baryshkov ◽  
A. M. Biblin ◽  
...  

The article presents estimates of radiation doses of technogenic exposure to personnel and the public due to the normal operation of radiation facilities, exposure to the public due to natural sources and technogenically altered radiation environment, and medical exposure of patients. The doses values were obtained using the Unified System of Individual Dose Control of the Russian Federation citizens for 2020. The authors have analyzed the data contained in the forms of state statistical observation No. 1-DOZ, No. 2-DOZ, No. 3-DOZ and No. 4-DOZ for 2020 submitted by the organizations and territories, the state sanitary and epidemiological supervision of which was carried out by Rospotrebnadzor and Federal Medical Biological Agency of Russia. In the article also were used data obtained within the framework of Radiation-Hygiene Passportization. In 2020, 19 737 organizations dealing with technogenic sources of ionizing radiation submitted forms No. 1-DOZ with the information on the doses to personnel with a total number of 230 318 persons, of which 230 318 persons belonged to the personnel group A and 21 303 persons belonged to the personnel group B. For these groups, the doses were assessed based on results of individual dosimetric control. In 2020, according to Unified System of Individual Dose Control of the Russian Federation citizens data, the average individual annual effective dose of technogenic exposure to the personnel group A was 1.11 mSv, and for the personnel group B it was 0.63 mSv. In 2020, 6 cases of exceeding the average annual effective dose limit (20 mSv) for Group A personnel and 18 cases of exceeding the average annual effective dose limit (5 mSv) for Group B personnel were registered. The total number of X-ray and radiological diagnostic procedures performed in the Russian Federation in 2020 exceeded 275.4 million, or 1.83 procedures per a citizen. The average annual effective dose of medical radiation exposure per one resident of Russia in 2020 was 0.81 mSv, and per procedure – 0.44 mSv. The average annual effective dose of radiation to residents of the Russian Federation from natural sources, according to all measurements for the period from 2001 to 2020, was 3.36 mSv. More than 59% of this dose is associated with the inhalation of radon and its progenies. The average individual annual effective radiation dose to residents the Russian Federation subjects in 2020 ranged from 2.47 mSv (Kamchatka Krai) to 9.06 mSv (Altai Republic) with an average value for the Russian Federation of 4.18 mSv. For eight subjects of the Russian Federation, the average individual annual effective dose to public in 2020 exceeded 5 mSv: the Republics of Buryatia (5.31 mSv), Altai (9.06 mSv), Tyva (6.31 mSv), Magadan (5.07 mSv) and Irkutsk (6.13 mSv) regions, Stavropol (6.31 mSv) and Zabaykalsky (8.19 mSv) krai and the Evreiskaya Autonomous oblast (6.77 mSv).


2021 ◽  
Vol 12 (4) ◽  
pp. 94
Author(s):  
Dirar Abdul-Hamid Al-Toum Al-Otaibi ◽  
Hossam Hosney Abdul Aziz ◽  
Shady Mohamed Shawky Abdel-mawgoud

Economic growth is always seen as one of the chief economic goals countries try to achieve, in order to develop its economics. Economic growth takes different forms following the varying economic theories, and it's mostly defined as achieving increase in average share of individual from the real gross national income at certain time period. One of the most frequently used indexes to measure economic growth is: Measuring economic growth based on the expected – no the real – income, especially in countries that possess rich resources. And based on gross domestic product at fixed price and one year, and the average individual share from real income.


Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7260
Author(s):  
Emmanouil Mavrogeorgis ◽  
Harald Mischak ◽  
Agnieszka Latosinska ◽  
Justyna Siwy ◽  
Vera Jankowski ◽  
...  

In recent years, capillary electrophoresis coupled to mass spectrometry (CE-MS) has been increasingly applied in clinical research especially in the context of chronic and age-associated diseases, such as chronic kidney disease, heart failure and cancer. Biomarkers identified using this technique are already used for diagnosis, prognosis and monitoring of these complex diseases, as well as patient stratification in clinical trials. CE-MS allows for a comprehensive assessment of small molecular weight proteins and peptides (<20 kDa) through the combination of the high resolution and reproducibility of CE and the distinct sensitivity of MS, in a high-throughput system. In this study we assessed CE-MS analytical performance with regards to its inter- and intra-day reproducibility, variability and efficiency in peptide detection, along with a characterization of the urinary peptidome content. To this end, CE-MS performance was evaluated based on 72 measurements of a standard urine sample (60 for inter- and 12 for intra-day assessment) analyzed during the second quarter of 2021. Analysis was performed per run, per peptide, as well as at the level of biomarker panels. The obtained datasets showed high correlation between the different runs, low variation of the ten highest average individual log2 signal intensities (coefficient of variation, CV < 10%) and very low variation of biomarker panels applied (CV close to 1%). The findings of the study support the analytical performance of CE-MS, underlining its value for clinical application.


2021 ◽  
Vol 9 (10) ◽  
pp. 235-251
Author(s):  
Shahajahan Ali ◽  
Jahedur Rahman ◽  
Nazrul Islam ◽  
Razzab Ali ◽  
Mofazzal Hossain ◽  
...  

Nutrient solution and its nutritional compositions may have the effect on growth and fruit quality attributes of cherry tomato. To avoid the build-up of toxins, mineral deficiencies, nutrition abnormalities, or the spread of disease, producers should use optimum level of nutrient solution. Therefore, the present experiment was conducted to identify a suitable strength of nutrient solution for cherry tomato in hydroponic system. Treatment considered six levels of nutrient solution [viz., S1: ½ strength Rahman and Inden (2012), S2: ¾ strength Rahman and Inden (2012), S3: Full strength Rahman and Inden (2012), S4: ½ strength Hoagland and Arnon No. 2(1940), S5: ¾ strength Hoagland and Arnon No. 2 (1940) and S6: Full strength Hoagland and Arnon No. 2 (1940)] and two varieties [viz., V1: Local market cherry tomato (red), V2: Irelands cherry tomato (yellow)]. Growth and yield contributing characters, quality parameters, physiological traits and biochemical composition were analyzed.  The maximum plant height, number of leaves per plant, first flowering, number of flowers per cluster, number of fruit per cluster, number of cluster per plant, average individual fruit weight and average cluster weight per plant were found in S3. Meanwhile, V2 performed better in respect of plant height, number of leaves per plant, first flowering, number of flowers per cluster, number of fruit per cluster, number of cluster per plant, average individual fruit weight and average cluster weight per plant. Therefore, cherry tomato cv. V2 can be cultured in hydroponic system with applying S3 (Full strength Rahman and Inden nutrient solution).


SERIEs ◽  
2021 ◽  
Author(s):  
Monica Martinez-Bravo ◽  
Carlos Sanz

AbstractUsing two novel online surveys collected in May and November 2020, we study the consequences of the COVID-19 pandemic on Spanish households. We document a large and negative effect on household income. By May 2020, the average individual lived in a household that had lost 16% of their pre-pandemic monthly income. Furthermore, this drop was highly unequal: while households in the richest quintile lost 6.8% of their income, those in the poorest quintile lost 27%. We also document that the pandemic deepened the gender-income gap: on average, women experienced a three-percentage point larger income loss than men. While this is consistent with previous findings in the literature, in this paper we document that this effect is driven by women from middle-income households with kids. Finally, we provide evidence that Spanish individuals experienced moderate declines in their levels of psychological well-being. This effect is not different for individuals living in rich or poor households, but the reasons behind well-being losses do differ: richer individuals are more concerned about loss of contact with dear ones, while low-income individuals are more likely to mention loss of income and employment as a key source of emotional distress.


2021 ◽  
Author(s):  
Eitan Bachmat ◽  
Sveinung Erland ◽  
Florian Jaehn ◽  
Simone Neumann

When boarding an aircraft, it is often assumed that minimizing the total boarding time meets economic objectives and passenger satisfaction. However, there are indications that not only the total boarding time should be considered in order to satisfy passengers. In “Air passenger preferences: an international comparison affects boarding theory,” a large survey among airplane passengers, which was conducted in Germany, Israel, and the United States, confirms that a significant share of passengers prefers short individual boarding times. Interestingly, if boarding is restricted to two boarding groups that differ by the passengers’ speed of taking their assigned seat (e.g., passengers with and without hand luggage), “slow-first” is best for minimizing the total boarding time, but “fast-first” is best for minimizing average individual boarding time. Thus, the paper presents a new boarding strategy called “slow-back-first,” where the resulting total boarding time and the resulting average individual boarding time are both close to their respective optimum.


2021 ◽  
Vol 1 (2) ◽  
pp. 41-54
Author(s):  
Nelson Tajudeen Adewale Abd'Razack ◽  
◽  
Samuel O Medayese ◽  
Itunu Valda Martins ◽  
Idowu O.O ◽  
...  

Nigeria is an unsustainable country due to an ecological deficit arising from the excessive utilization of natural resources. Resources are consumed more than their bio-capacity. Lifestyle and variation in the needs of households have exerted demands on the natural resources and eventually on the global environment. This research therefore aimed at estimating the Ecological Footprints of the average individual in a household in the urban and rural areas of the Minna region in Nigeria. It identifies the types of resource consumption; the impact of consumption on the EF and compares the EF of both about the level of sustainability. Data were collected employing primary and secondary sources for the study. A total of 400 households was selected for the study. Questionnaire administration was employed to collect the data and random sampling was employed. The data were analyzed through explanatory and inferential statistics. The result of the study shows that the EF of Minna and Maikunkele were 1.10 and 0.892 gha. Households require an average of 0.91 and 0.74 planets to sustain their living standard and generate 6.2 and 4.3 tonnes of CO2 annually. 9 and 6 factors influence EF. It is recommended that the lifestyle of the household in the Minna region has to be modified to reduce pressure on environmental resources and the emission of GHG for sustainable development.


2021 ◽  
Vol 79 (3) ◽  
pp. 119-123
Author(s):  
Antonia Kurtela

Abstract Rainbow trout Oncorhynchus mykiss (Walbaum 1792) larvae that first started active feeding were separated into 3 replicate batches (1A, 1B, 1C) with 100 individuals each, while four days later, the fry that last started active feeding were also distributed in 3 replicate batches (2A, 2B, 2C) with 100 individuals. Four measurements were performed with an interval of four days between the first and second measurements, as well as between the third and fourth measurements, to compare the initial masses of individuals by groups (1ABC and 2ABC) on the same day from the beginning of active feeding. The average initial body weight of the fry per batch in each measurement was generally higher in the first group (1ABC) than in the second group (2ABC). However, when comparing the weight of both groups for the same number of days from the beginning of active feeding, it is noticed that the second group (2ABC) has a higher average individual weight than the first group (1ABC). There was no statistically significant difference (one-way ANOVA, p>0.05) in SGRw between the groups in the first three measurements, while there is a statistically significant difference (one-way ANOVA, p<0.05) in SGRw in the fourth measurement. Group 2ABC has a significantly higher SGRw (5.0064%day−1±0.05394) than group 1ABC (4.7711%day−1±0.01715). This leads to the conclusion that in the second group 2ABC, the backlog of 4 days in mass was compensated. It is also noted that mortality in the first group (1ABC) was only 1%, while in the second group (2ABC) it was 3.7%. Consequently, a higher density of the fry in the first group (1ABC) could have an impact on a lower growth rate.


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