scholarly journals IRRIGATION - THE BASIS FOR INCREASING THE STABILITY OF ENTOMOCENOSES IN ARID CONDITIONS OF SOUTHEAST OF RUSSIA

2019 ◽  
Vol 14 (1) ◽  
pp. 34-39
Author(s):  
Виктор Мелихов ◽  
Viktor Melihov ◽  
Евгений Комаров ◽  
Evgeniy Komarov ◽  
Ольга Комарова ◽  
...  
Keyword(s):  
Species Abundance ◽  
Agricultural Landscapes ◽  
Physiological Indicators ◽  
Air Temperatures ◽  
Irrigated Crops ◽  
Microclimatic Conditions ◽  
The Difference ◽  
Pesticide Load ◽  
The Stability ◽  
The Relationship

The article presents materials of perennial (1988–2017) studies on solving problems of stabilizing the phytosanitary situation in irrigated agrocenoses. The paper presents the results of studying the species abundance and insects, the patterns of their change under the influence of irrigation in the Lower Volga region. The effect of irrigation on the change in environmental conditions by the parameters of productivity of agrobiocenoses and microclimate is shown. The difference in air temperature in irrigated by sprinkling and non-irrigated agrocenoses immediately after watering reaches 7-8° C. In general, during the growing season, the average daily air temperatures in the irrigated agrocenosis were 2-4° C lower, compared to the non-irrigated. More mesophytic microclimatic conditions, which are formed under the influence of irrigation, are the leading factor determining the increase in the biodiversity of the entomocomplexes of irrigated agrocenoses due to an increase in species abundance and the number of mesophilic and hygrophilic insects. An increase in species diversity and abundance of meso-and hygrophilic in irrigated agricultural landscapes due to the emergence of new micro-sites (canals, spillways, storage ponds, etc.) is also shown. The formation of irrigated conditions in poly-dominant entomological communities, which increase the balance of the agroecosystem, including by optimizing its trophic structure. The changing ecological situation in irrigated agricultural landscapes determines the cultivation of plants with optimized physiological indicators, and the biological characteristics of the development of harmful and beneficial insects change under irrigation conditions. All this directly affects the relationship between phytophages and plants, as well as their survival, fertility, life expectancy of individual phases and other biological features of populations. It is noted that on irrigated crops there is a more favorable relationship between entomophages and pests, making it possible to self-regulate the entomofauna due to increased activity of entomophages. This creates a real opportunity to save the crop and reduce the pesticide load by 40-50% on irrigated crops.

New Boundaries, New Relationships

2020 ◽  
pp. 79-97
Author(s):  
LaTonya J. Trotter
Keyword(s):  
Registered Nurses ◽  
Nurse Practitioner ◽  
Power Relations ◽  
Medical Work ◽  
Nurses And Physicians ◽  
Signal Changes ◽  
The Difference ◽  
The Stability ◽  
The One ◽  
The Relationship

This chapter evaluates how the presence of the nurse practitioner (NP) does not just signal changes in nursing work; it portends changes in medical work. Although real tensions exist between nurses and physicians, broadly speaking, they have worked collegially alongside one another for well over a century. This collegiality has endured despite significant changes in what both physicians and nurses do for patients. Its endurance, however, has been predicated on the one thing that has not changed: the power relations between the two. It is the difference in authority, and not just the difference in work, that undergirds the stability of the relationship between the two professions. The NP threatens to disrupt that stability. When registered nurses (RNs) become NPs, they are not just learning new skills; they are crossing lines of authority that they had previously learned to treat as constitutive of their profession. The chapter then looks at the voices and experiences of the NPs of Forest Grove Elder Services. Their narrated and actual practices negotiated physician authority in very different ways.

Regulatory capital and stability of Islamic and conventional banks

2017 ◽  
Vol 10 (3) ◽  
pp. 312-330 ◽  
Author(s):  
Fakhri Korbi ◽  
Khemaies Bougatef
Keyword(s):  
Islamic Banks ◽  
Regulatory Capital ◽  
Bank Stability ◽  
Content Type ◽  
Failure Risk ◽  
Negative Effect ◽  
The Difference ◽  
Conventional Banks ◽  
The Stability ◽  
The Relationship

Purpose The purpose of this paper is twofold. First, it attempts to determine the factors that influence the stability of Islamic and conventional banks. Second, it focuses on the relationship between the regulatory capital and bank soundness. Design/methodology/approach Thus, the authors use the Z-score to assess the stability of Islamic and conventional banks operating in the Middle East and North Africa region over the period 1999 to 2014. Findings The comparative analysis reveals that Islamic banks seem to be less stable than their conventional peers. With regard to the determinants of bank stability, the findings suggest that the regulatory capital represents the primordial factor that reinforces the soundness of banking systems. The authors also find that bank stability depends on both bank-specific variables as well as macroeconomic and institutional variables. Interestingly, the corruption level turns out to have a significant negative effect on financial strength in the both types of banks. Originality/value The authors believe that investigating the relationship between regulatory capital and the failure risk in a comparative study between Islamic and conventional banks deserves a particular attention and looks very interesting because it will allow them to identify the difference between the factors explaining the failure risk of each type of banks. The authors also believe that the analysis of the relationship between corruption and bank stability is very interesting because corruption can be seen as an example of moral hazard which forces Islamic banks to use non-PLS instruments.

scholarly journals Effect of Localization on the Stability of Mutualistic Ecological Networks

2015 ◽  
Author(s):  
Samir Suweis ◽  
Jacopo Grilli ◽  
Jayanth Banavar ◽  
Stefano Allesina ◽  
Amos Maritan
Keyword(s):  
Species Abundance ◽  
Interaction Network ◽  
Species Interaction ◽  
Interaction Networks ◽  
Ecological Communities ◽  
Weighted Degree ◽  
Perturbation Propagation ◽  
The Stability ◽  
The Impact ◽  
The Relationship

The relationships between the core-periphery architecture of the species interaction network and the mechanisms ensuring the stability in mutualistic ecological communities are still unclear. In particular, most studies have focused their attention on asymptotic resilience or persistence, neglecting how perturbations propagate through the system. Here we develop a theoretical framework to evaluate the relationship between architecture of the interaction networks and the impact of perturbations by studying localization, a measure describing the ability of the perturbation to propagate through the network. We show that mutualistic ecological communities are localized, and localization reduces perturbation propagation and attenuates its impact on species abundance. Localization depends on the topology of the interaction networks, and it positively correlates with the variance of the weighted degree distribution, a signature of the network topological hetereogenity. Our results provide a different perspective on the interplay between the architecture of interaction networks in mutualistic communities and their stability.

scholarly journals Evaluation of the Stability of Small Ruptured Aneurysms with a Small Neck after Embolization with Guglielmi Detachable Coils

2006 ◽  
Vol 12 (1_suppl) ◽  
pp. 91-96 ◽  
Author(s):  
Y. Kai ◽  
J. Hamada ◽  
M. Morioka ◽  
S. Yano ◽  
J. Kuratsu
Keyword(s):  
Endovascular Surgery ◽  
Guglielmi Detachable Coils ◽  
Ruptured Aneurysms ◽  
Detachable Coils ◽  
The Mean ◽  
The Difference ◽  
The Stability ◽  
The Relationship ◽  
Ruptured Intracranial Aneurysms

It is difficult to predict the compaction of Guglielmi detachable coils (GDC) after endovascular surgery for aneurysms. Therefore, we studied the relationship between the coil packing ratio and compaction in 62 patients with acute ruptured intracranial aneurysms that were small (<10 mm) had a small neck (<4 mm) and were coil-embolized with GDC-10. We recorded the maximum prospective coil length, L, as the length that correspond with the volume of packed coils occupying 30% of the aneurysmal volume. L was calculated as L (cm) = 0.3 × a × b × c and the coil packing ratio expressed as packed coil length/L × 100, where a, b, and c are the aneurysmal height, length, and width in mm, respectively. Angiographic follow-up studies were performed at three months and one and two years after endovascular surgery. Of the 62 patients, 16 (25.8%) manifested angiographic coil compaction (ten minor and six major compactions); the mean coil packing ratio was 51.9 ± 13.4%. The mean coil packing ratio in the other 46 patients was 80.5 ± 20.2% and the difference was statistically significant (p<0.01). In all six patients with major compaction the mean packing ratio was below 50%. We detected 93.8% of the compactions within 24 months of coil placement. In patients with small, necked aneurysms, the optimal coil packing ratio could be identified with the formula 0.3 × a × b × c. The probability of compaction was significantly higher when the coil packing ratio was under 50%. To detect coil compaction post-embolization, follow-up angiograms must be examined regularly for at least 24 months.

The Pay and Conditions of Merchant Seamen

2012 ◽  
pp. 127-152
Author(s):  
Ralph Davis
Keyword(s):  
Social Security ◽  
Slave Trade ◽  
Lump Sum ◽  
Legislative Regulation ◽  
The Difference ◽  
The Stability ◽  
The Relationship

This chapter studies the conditions of crewmen during the seventeenth and eighteenth centuries through the systems of payment and wages. It explores the methods by which wages were calculated - such as through shares of the ship’s earnings or payment in lump sum, often the case for shorter voyages. It finds that peace and wartime rates differed, and seeks to determine the reasons for the stability of peacetime wages. It then breaks down the crew roles and their payment rates, and compares the difference between master, mate, and carpenter wages. It give further attention to legislative regulation; advance payments; contributions to social security; and portage. The relationship between wages for slave trade cargoes also comes under consideration, due to disputes over crew requests to carry slaves freight free. Finally, it looks at the difficulties and dangers of the seafaring life, in order to determine why so many men took the risks involved in a career at sea.

scholarly journals UPAYA PENINGKATAN KADAR HEMOGLOBIN REMAJA PUTRI SMK WIDYA PRAJA UNGARAN PADA PEMBERIAN KUDAPAN BERBASIS TEPUNG TEMPE

2020 ◽  
Vol 8 (1) ◽  
pp. 52-59
Author(s):  
Arintina Rahayuni ◽  
Astidio Noviardhi ◽  
Dyah Nur Subandriani
Keyword(s):  
Treatment Group ◽  
Study Participant ◽  
Iron Protein ◽  
Nutritional Anemia ◽  
Nutritional Problem ◽  
Nutrients Intake ◽  
The Difference ◽  
The Stability ◽  
And Control ◽  
The Relationship

Background : Anemia is a nutritional problem in Indonesia which was characterized by a condition where the  red blood cells or hemoglobin levels is lower than the normal value. Nutritional anemia is caused by deficiency nutrients that play a role in the formation of hemoglobin, due to inadequate consumption or absorption disorders. These nutrients are iron, protein, vitamin B12 which act as catalysts in hem synthesis in hemoglobin molecules, vitamin C, zinc which affect iron absorption and vitamin E which affect the stability of the red blood cell membrane. Most of these are iron nutrient anemia. Females adolescent are more susceptible to anemia compared than men. The minimum of hemoglobin levels in females adolescent to diagnose as anemia is when hemoglobin levels are less than 12 g / dl.Objective : To increase hemoglobin levels of females adolescents by providing tempeh flour-based snacksMethod : In this study, an attempt had made to create tempe-based formula in the form of pizza which was high in iron and protein, the availability of tempe flour was great because the absorption disturbing agent was damaged by the fermentation process. The analysis was carried out to observe the difference in Hb levels in the treatment group (given tempe flour pizza) and control (given a regular pizza) and the relationship between BMI, nutrients-intake and consumption compliance with Hb levels.Result : The results showed there was an increase in Hb levels of 1.21 g% in the treatment group (61.54%). Nevertheless, the increase did not statistically significant. There was no relationship between BMI, nutrients intake and compliance with pizza consumption to increase Hb levels.Conclussion : Administration of tempeh fluor-based pizza for a month could increase Hb levels by 1.21 g/dl in most study participant, but it did not statistically significant.

Comparative Study of Microclimate Diversity and Transition Characteristics Focused on the Living Environment in the Cold-Winter and Hot-Summer Area of China

2013 ◽  
Vol 409-410 ◽  
pp. 695-698
Author(s):  
Zu Kang Lei ◽  
Zhi Qiang Gao
Keyword(s):  
Indoor Environment ◽  
Building Envelope ◽  
Living Environment ◽  
Cold Winter ◽  
Interior Spaces ◽  
Living Space ◽  
Air Temperatures ◽  
The Difference ◽  
The Stability ◽  
Main Factor

This article surveys mainly the microclimate diversity and transition characteristics of air temperatures and relative humiditys differences between exterior and different interior spaces at a typical Chinese residence in the cold-winter and hot-summer area by summer and winter, which is under the situation without air conditioning. According to the results, building envelope is the main factor of affecting the stability of indoor environment, limited impact on the relative humidity. The closed state of living space and ventilation are also the origin of causing the difference of RH.

The Efficiency of Peroxides for Curing Silicone Elastomers

1993 ◽  
Vol 66 (4) ◽  
pp. 605-622 ◽  
Author(s):  
J. B. Class ◽  
R. P. Grasso
Keyword(s):  
Free Radical ◽  
Hydrogen Abstraction ◽  
Tensile Modulus ◽  
Entire Concentration Range ◽  
Silicone Elastomers ◽  
Heat Curing ◽  
The Difference ◽  
The Stability ◽  
The Relationship ◽  
Insight Into

Abstract Peroxides are preferred for heat curing vinylmethylsilicone (VMQ) elastomers because the free-radical-initiated crosslink does not reduce the inherent stability of the polymer. The objectives of this work were (1) to obtain information on the relationship between peroxide concentration and the physical properties of heat-cured silicone elastomers, and (2) to explain the suspected difference in efficiency of two peroxides, α,α′-di(tert-butylperoxy)-m/p-diisopropylbenzene (DBPIB) and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (DBPH). VMQ bases and gums were cured with DBPIB and DBPH over a range of peroxide concentrations. Higher tensile modulus and higher delta torque (oscillating disk rheometer data) were observed when curing with DBPIB over the entire concentration range. This indicates that DBPIB produces a higher crosslink density than DBPH at equivalent molar concentrations. A series of calculations were performed, using computational chemistry techniques, to gain insight into the reason for the observed difference in crosslinking efficiency between DBPIB and DBPH. These calculations show that DBPIB is not more efficient than DBPH in abstracting hydrogen from the methyl groups of sihcone elastomers. The predominant cause for the difference in efficiency is related to the stability of the DBPH free radical. This radical is formed from hydrogen abstraction at the central ethylene moiety of DBPH by neighboring peroxy fragments. Therefore, DBPH is more susceptible to hydrogen abstraction, which consumes radicals in nonproductive (noncrosslinking) pathways This difference in peroxide efficiency may apply to other polymers.

Comparison of In-the-Ear and Over-the-Ear Hearing Aid Fittings

1986 ◽  
Vol 51 (4) ◽  
pp. 362-369 ◽  
Author(s):  
Donna M. Risberg ◽  
Robyn M. Cox
Keyword(s):  
Hearing Aids ◽  
High Frequency ◽  
Comparative Evaluation ◽  
Speech Intelligibility ◽  
Hearing Aid ◽  
Hearing Aid Fitting ◽  
The Difference ◽  
Functional Gain ◽  
The Relationship

A custom in-the-ear (ITE) hearing aid fitting was compared to two over-the-ear (OTE) hearing aid fittings for each of 9 subjects with mild to moderately severe hearing losses. Speech intelligibility via the three instruments was compared using the Speech Intelligibility Rating (SIR) test. The relationship between functional gain and coupler gain was compared for the ITE and the higher rated OTE instruments. The difference in input received at the microphone locations of the two types of hearing aids was measured for 10 different subjects and compared to the functional gain data. It was concluded that (a) for persons with mild to moderately severe hearing losses, appropriately adjusted custom ITE fittings typically yield speech intelligibility that is equal to the better OTE fitting identified in a comparative evaluation; and (b) gain prescriptions for ITE hearing aids should be adjusted to account for the high-frequency emphasis associated with in-the-concha microphone placement.

Relationship between total plasma homocysteine and the risk of aneurysms – a meta-analysis

VASA ◽  
2020 ◽  
pp. 1-6
Author(s):  
Hanji Zhang ◽  
Dexin Yin ◽  
Yue Zhao ◽  
Yezhou Li ◽  
Dejiang Yao ◽  
...  
Keyword(s):  
Large Scale ◽  
Meta Analysis ◽  
Single Species ◽  
Total Plasma ◽  
Control Groups ◽  
Randomized Controlled ◽  
Randomized Controlled Studies ◽  
The Difference ◽  
The Relationship ◽  
Healthy Participants

Summary: Our meta-analysis focused on the relationship between homocysteine (Hcy) level and the incidence of aneurysms and looked at the relationship between smoking, hypertension and aneurysms. A systematic literature search of Pubmed, Web of Science, and Embase databases (up to March 31, 2020) resulted in the identification of 19 studies, including 2,629 aneurysm patients and 6,497 healthy participants. Combined analysis of the included studies showed that number of smoking, hypertension and hyperhomocysteinemia (HHcy) in aneurysm patients was higher than that in the control groups, and the total plasma Hcy level in aneurysm patients was also higher. These findings suggest that smoking, hypertension and HHcy may be risk factors for the development and progression of aneurysms. Although the heterogeneity of meta-analysis was significant, it was found that the heterogeneity might come from the difference between race and disease species through subgroup analysis. Large-scale randomized controlled studies of single species and single disease species are needed in the future to supplement the accuracy of the results.

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