Estabilidad de los docentes curriculares de institutos privados reconocidos o adscriptos a la enseñanza oficial : en tiempos de normalidad y en el de la pandemia.

En tiempo de pandemia, el DNU Nº329/2020(B.O.,31/3/2020) del Poder Ejecutivo nacional se dictó en el marco de la emergencia sanitaria por el coronavirus y sus prórrogas decididas por el DNU Nº487/2020 (B.O.,19/5/2020) y el DNU Nº 624/2020 (B.O.,29/7/2020) prohibieron los despidos sin justa causa y por causas económicas y por fuerza mayor por el plazo de 60 días contados a partir de la fecha de su publicación en el Boletín Oficial, desde el 31 de marzo hasta el 29 de mayo de 2020, luego hasta el 28 de julio y más tarde hasta el 26 de setiembre de 2020. Se ha establecido un régimen de estabilidad propia o absolutapara todos los trabajadores privados a los que alcanzan esos DNU, incluidos los docentes privados de cualquier nivel, curriculares o no- pero pro tempore, porque es limitada al plazo de veda. La decisión del Poder Ejecutivo Nacional aparece como constitucional y convencional, adecuada a normas supra legales que él mismo cita y a otras ut supra referidas, como a la jurisprudencia de la CSJN y la CIDH. Pasada la emergencia y la vigencia del DNU, la incógnita está en si se volverá para todos los trabajadores privados en Argentina al sistema de estabilidad relativa impropia o se podrá pasar a una intermedia, como es la que acompaña a los docentes privados mencionados desde 1947, parecida a la del Estatuto de los Trabajadores español para el caso de despido improcedente, o laexcepción del DNU se volverá regla.ABSTRACT: In times of pandemic, DNU No. 329/2020 (BO, 3/31/2020) of the national Executive Power was issued within the framework of the health emergency caused by the coronavirus and its extensions decided by DNU No. 487/2020 (BO, 19 / 5/2020) and DNU No. 624/2020 (BO, 7/29/2020) prohibited dismissals without just cause and for economic reasons and force majeure for a period of 60 days from the date of its publication in the Official Gazette, from March 31to May 29, 2020, then until July 28 and later until September 26, 2020. A regime of own or absolute stability has been established for all private workers to those who reach these DNU, including private teachers of any level, curricular or not - but pro tempore, because it is limited to the closed period. The decision of the National Executive Power appears as constitutional and conventional, adequate to supra-legal norms that it cites itself and to other supra-referred ones, such as the jurisprudence of the CSJN and the IACHR. After the emergency and the validity of the DNU, the question is whether it will return for all private workers in Argentina to the system of improper relative stability or it will be possible to move to an intermediate one, such as the one that accompanies the private teachers mentioned since 1947, similar to that of the Spanish Workers' Statute in the case of unfair dismissal, or the exception of the DNU will become the rule.

Indoor radon levels in Hungarian kindergartens

Annual average indoor radon activity concentration was studied in 88 Hungarian kindergartens in 76 towns of 10 different counties. Annual average indoor radon activity concentration in the kindergartens was 61 Bq m− 3, maximum was 160 Bq m− 3. In the kindergartens the seasonal variation of radon is not so strong like in dwellings, because of the permanent ventilation and the closed period during the summer break.

Application of Ubiquitous Devices for Fishery Control of Endangered Species

Recognition of fish species is of great importance to marine biology and aquaculture. Ubiquitous devices represent an efficient solution for the preservation of species through the monitoring of fish in the risk of extinction. This approach is essential for endangered population assessment as well as for ecosystem preservation. Several methods have been assessed in these devices to solve the complex task of identifying at-risk of overfishing. As an alternative, the convolutional neural networks (CNNs) represent an accurate method for pattern recognition. Hence, this paper proposes the performance evaluation of a fish recognition model based on CNNs in ubiquitous devices, focusing on the preservation of these species principally during the closed period.

Distribution and fate of trawling-induced suspension of sediments in a marine protected area

Bottom trawls suspend sediments by physical contact and the drag created by the gear when towed over the seafloor. Increased turbidity and redistribution of sediments may be of concern as some organisms are vulnerable to increased levels of sediment particles in the water column. This study investigates the distribution and fate of trawling-induced suspension of sediments in a coastal marine protected area (MPA). Bottom trawling is allowed in a deep trench of the MPA and regulated to weekdays with weekend closures. We use the closed period as controls to experimentally investigate sediment resuspension generated by the trawling fleet. We find that the turbidity is elevated at trawled depths and originates from small particles of silt–mud seafloor origin that remain suspended for days preventing background levels to be reached during closures. Peaks in the plumes behind trawlers reach levels critical to organisms but decays within hours. Currents in the trench are too weak to resuspend sediments; however, wind-induced resuspension events of elevated turbidity likely originating from nearby shallower areas may occur. Short-term closures and small-scale MPAs are concluded to be of limited use as management tools to reduce effects of resuspension by bottom trawling.

Characterisation of dairy soiled water in a survey of 60 Irish dairy farms

Dairy farming in Ireland generates an effluent known as dairy soiled water (DSW), which consists of a relatively dilute mixture of cow faeces, urine, spilt milk and detergents that is typically applied to grassland. However, relatively little is known about the volumes generated, nutrient content and management factors that influence volume and concentration. Sixty dairy farms that had a separate storage tank for storing DSW were selected for this study. The spatial distribution of the farms reflected the spatial distribution of dairy cows across the 26 counties of the Republic of Ireland, with each farm representing between 10,000 and 20,000 dairy cows. Samples were analysed for biochemical oxygen demand (BOD), ammonium N (NH4-N), total nitrogen (TN), potassium (K), phosphorus (molybdate-reactive and total) (MRP and TP) and dry matter (DM) content. Management characteristics and parlour properties were quantified. Factors influencing volume and concentration of DSW were determined using mixed model multiple regression analysis. On average, 9784 l (standard error 209 l) of DSW, including rainfall, was produced cow−1year−1and this contained significant quantities of total N, P and K (587, 80 and 568 mg l−1, respectively). A typical Irish dairy farm stocked at 1.9 cows ha−1could therefore supply approximately 13, 2 and 12 kg ha−1of total N, P and K, respectively, across the farm, annually to meet some of the nutrient requirements for herbage production and potentially replace some of the synthetic fertilizer use. Seventy one percent of samples were within the regulated concentration limits of soiled water for BOD (<2500 mg l−1), rising to 87% during the closed period for slurry spreading (mid October to mid-late January), while 81% were within the concentration limits for DM (<1% DM), rising to 94% during the closed period. The efficiency of a milking parlour (cows per unit, time taken) plays a key role in determining the volume of DSW generated. This, in turn, also influences the concentration of nutrients and other chemicals. Large variability was found in nutrient concentrations and this presents a challenge for effective nutrient management to maximise the fertilizer replacement value of DSW.

Bifurcation of Water Column Oscillator Behavior Simulating Reactor Safety System: 2nd Report, Analytical Model

Behavior of a water column oscillator with a cover gas system was studied experimentally and analytically. One of the free water surfaces was sealed with the cover gas, while the other was open to the atmosphere. The cover gas was supplied with a constant rate, and it was ejected through a valve when the water level reached a certain point. As soon as the level reached another point, the valve closed and the cover gas quantity increased again. In the experiment, a bifurcation-like phenomenon was observed; the valve closed period usually had a single value, while it took two values under certain conditions. In order to examine the cause of this bifurcation-like phenomenon, a numerical analysis model was developed which described the system behavior precisely. The analytical result revealed that the bifurcation-like phenomenon was not bifurcation but an abrupt change of the value dimmed by superimposed noise. Finally the numerical model predicts that the water column oscillator behaves chaotically at certain conditions.

Numerical Investigation of Bifurcation in Water Column Oscillator

Behavior of a water column oscillator with a cover gas system was studied experimentally and analytically. One of the free water surfaces was sealed with the cover gas, while the other was open to the atmosphere. The cover gas was supplied with a constant rate, and it was ejected through a valve when the water level reached a certain point. As soon as the level reached another point, the valve closed and the cover gas quantity increased again. In the experiment, a bifurcation-like phenomenon was observed; the valve closed period usually had single value, while it took two values under certain conditions. In order to examine the cause of this bifurcation-like phenomenon, a numerical analysis model was developed which described the system behavior precisely. The analytical result revealed that the bifurcation-like phenomenon was not bifurcation. Very small noise superimposed on the singular characteristic of the system was found to cause the two duration values under the conditions; the duration changed abruptly by an uncontrollable slight variation of the system conditions. It is likely to be confused with bifurcation by observers who could not perceive the uncontrollable noise.

Preliminary assessments of stocks of the Western Australian crayfish, Panulirus cygnus George

Total catch of Panulirus cygnus in Western Australia rose from 0.6 million lb in 1944-45 to 21.4 million Ib in 1962-63. Fishing effort increased rapidly with the result that the catch per unit effort declined progressively. Effort has been limited by regulation since 1963. From records of catch and effort from specified areas at intervals of one month throughout each season, estimates were made of mortality coefficients (Z1, F, and M1) and catchability coefficient (q). Stock size, recruitment, and exploitation rates were then estimated. As the seasonal catch per unit effort followed the same trend throughout all fishing areas, the detailed results from the selected areas have been applied to the whole fishery. The fishable stock, originally of approximately 140 million lb, had declined to some 35 million lb by 1963. Exploitation rate rose as effort was increased, and then levelled off (generally at above 60%), further increase in fishing effort resulting in a fall in the catchability coefficient rather than a change in the exploitation rate. Because of the high exploitation rate in recent years, the fishable stock available on the grounds at the opening of a season is largely dependent on recruitment (by growth) of juveniles during the preceding closed period. This recruitment has been diminishing from year to year, apparently because of mortality of undersize (pre-recruit) crayfish handled in fishing pots. Provision of escape gaps in all fishing pots is recommended. A sustainable level of catch might be 16,000,000±2,000,0001b per year if recruitment can be stabilized. Some further restriction of fishing effort might be necessary.