high threshold
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Author(s):  
Stephen U. Ufoaroh ◽  
Kelvin N. Nnamani ◽  
Azubuike N. Aniedu

One ideal performance of this design is in the areas of decimation where a decimation factor of 10, 45-order and pass band ripple of 1dB and interpolation of sampled rates where a sinusoidal signal input produced a ripple free output with interpolation factor of 10, 52-order and stopband attenuation of 60dB. Owing to the multiple samples of filter length of 200, the filter performed down sampling preceded with filtering as well as up sampling preceded with filtering, hence multi-rate filter by allowing a low threshold of frequency of  to be passed, blocking a high threshold of   and vice versa. There was resampled output increased to 150% preceded by filtering. The filter coefficients for low pass and high pass Digital FIR filter, through the least square regression method, parks McClellan Algorithm and window methods were employed for easy optimization. More so, there was creation of 2-4-5 filter channel banks through the 2nd-level convolution of their down sampling and up sampling filtering techniques during the multi-irate filtering to ensure the design of error-free Digital FIR Filter using MATLAB File editor(M-File) and tool boxes for writing the C-programming of the design. In the analysis, the mean and standard deviation of the low pass Digital FIR Filter output during decimation and interpolation are (0.26, 6.13) and (0.004,1.22) respectively.


Author(s):  
Jialiang Liu ◽  
Yu Jin ◽  
Yujie Zhu ◽  
Jinyang Li ◽  
Xuguang Zhang ◽  
...  

AbstractHigh-pressure water jet crushing concrete has significant advantages in safety, quality and environmental protection, which has a broad application prospect in the maintenance and reconstruction of concrete building. Nevertheless, it still has some problems such as high threshold pump pressure and large specific energy consumption. Water jet breaking concrete with liquid nitrogen (LN2) cold shock assistance combined with the low-temperature-induced fracturing and hydraulic impact can effectively reduce the working pressure of water jet and improve the energy utilization rate. On account of the unclear cracking characteristics and mechanism of concrete under the LN2 cold shock, this research carried out the following systematic research focusing on the key scientific issues above based on mechanical tests, scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR). Results indicate that the total mass of concrete exfoliated blocks after compression failure increases as the LN2 cold shock time and the number of shock cycles goes up, and the uniaxial compressive strength decreases from 8.27 to 21.96%. Through SEM and NMR analysis, it is found that LN2 cold shock can cause more micro-cracks to develop inside the concrete, and the pore development increases as the cold shock time and the cycle number increase. Additionally, under the condition of water jet pump pressure of 150 MPa, the maximum width and depth of crater for cold shock of 5 min increase by 41.79% and 20.48%, respectively, and those for cold shock of 10 min increase by 76.72% and 40.43%, respectively, compared with the original sample.


2021 ◽  
Vol 9 ◽  
Author(s):  
Mona I. Kidon ◽  
Soad Haj Yahia ◽  
Diti Machnes-Maayan ◽  
Yael Levy ◽  
Shirli Frizinsky ◽  
...  

Peanut allergy is an increasing concern in younger children. Available bedside diagnostic tools, i.e., prick tests with commercial extracts or peanut-containing foods have only limited predictive values. In a cohort of preschoolers with both a history of allergic reactions and sensitization to peanut proteins, we aimed to characterize the impact of skin tests with a novel composition of peanuts LPP-MH. Almost one quarter (27/110) of preschool children, with a history of allergic reactions to peanuts and positive standard IgE-mediated tests for peanut allergy, can tolerate the reintroduction of peanut proteins into their diet after resolving their allergy and, thus, can avoid adverse health outcomes associated with the false diagnosis. In the younger age group, a quarter of peanut allergic children, display a relatively high threshold, potentially enabling an easier and safer oral immunotherapy protocol in this window of opportunity in childhood. The use of the novel diagnostic skin test, LPP-MH, significantly improves the predictive value of outpatient evaluation for the outcomes of peanut challenge as well as the expected threshold at which the PA child will react, thus, making for a better informed decision of how, when, and where to challenge.


Grotiana ◽  
2021 ◽  
Vol 42 (2) ◽  
pp. 335-353
Author(s):  
Dire Tladi

Abstract The concept of a Grotian moment remains rather obscure in international law. On the one hand, it can refer simply to an empirical fact which galvanises the ordinary law-making processes, whether treaty-making or State practice, resulting in major shifts in international law. On the other hand, a Grotian moment might be seen as an event so significant that it results in an extraordinary shift in international law without full adherence to the processes for law-making. The former understanding has little legal significance, while the latter, which would be legally significant, would be controversial and without legal basis. Against this background the article discusses the intersections between peremptory norms and Grotian Moments. It does this by looking at the intersection between the two concepts as well as the intersection between Grotian Moments, on the one hand and, on the other hand, particular jus cogens norms. With respect to the former, for example, the article will consider whether the high threshold of peremptory status facilitates and hinders Grotian moments. With respect to the latter, the article will consider particular norms that have been said to have shifted on account of the Grotian moments, namely the right to use of force in self-defence as well humanitarian intervention.


Geosphere ◽  
2021 ◽  
Author(s):  
Jeremy P. Richards ◽  
Matthew Leybourne

Arc magmas globally are H2O-Cl-S–rich and moderately oxidized (ΔFMQ = +1 to +2) relative to most other mantle-derived magmas (ΔFMQ ≤ 0). Their relatively high oxidation state limits the extent to which sulfide phases separate from the magma, which would otherwise tend to deplete the melt in chalcophile elements such as Cu (highly siderophile elements such as Au and especially platinum-group elements are depleted by even small amounts of sulfide segregation). As these magmas rise into the crust and begin to crystallize, they will reach volatile saturation, and a hydrous, saline, S-rich, moderately oxidized fluid is released, into which chalcophile and any remaining siderophile metals (as well as many other water-soluble elements) will strongly partition. This magmatic-hydrothermal fluid phase has the potential to form ore deposits (most commonly porphyry Cu ± Mo ± Au deposits) if its metal load is precipitated in economic concentrations, but there are many steps along the way that must be successfully negotiated before this can occur. This paper seeks to identify the main steps along the path from magma genesis to hydrothermal mineral precipitation that affect the chances of forming an ore deposit (defined as an economically mineable resource) and attempts to estimate the probability of achieving each step. The cumulative probability of forming a large porphyry Cu deposit at any given time in an arc magmatic system (i.e., a single batholith-linked volcanoplutonic complex) is estimated to be ~0.001%, and less than 1/10 of these deposits will be uplifted and exposed at shallow enough depths to mine economically (0.0001%). Continued uplift and ero­sion in active convergent tectonic regimes rapidly remove these upper-crustal deposits from the geological record, such that the probability of finding them in older arc systems decreases further with age, to the point that porphyry Cu deposits are almost nonexistent in Precambrian rocks. A key finding of this paper is that most volcanoplutonic arcs above subduction zones are prospective for porphyry ore formation, with prob­abilities only falling to low values at late stages of magmatic-hydrothermal fluid exsolution, focusing, and metal deposition. This is in part because of the high threshold required in terms of grade and tonnage for a deposit to be considered economic. Thus, the probability of forming a porphyry-type system in any given arc segment is relatively high, but the probability that it will be a large economic deposit is low, dictated to a large extent by mineral economics and metal prices.


2021 ◽  
Author(s):  
◽  
Sean Mallett

<p>Section 102 of the Sentencing Act 2002 gives judges’ only limited discretion when sentencing for stage-1 murder: the discretion to rebut the presumption of life imprisonment in circumstances where the sentence would otherwise be “manifestly unjust”. This is a high threshold, and the Court of Appeal has said that it will be met only in exceptional cases. The judgment in R v Cunnard is the first time that a person who derived their conviction of murder from a principal offender has had the presumption displaced, and this essay explores whether or not this decision has lowered the threshold to establish manifest injustice. Although Miller J’s judgment conforms to the common features that exist in the few cases where the presumption has been successfully displaced, it is not without criticism. There are issues as to whether an overall assessment of the circumstances of the offence and the offender were made, as well as significant concerns regarding the emphasis the judge placed on sentence parity between co-offenders.</p>


2021 ◽  
Author(s):  
◽  
Sean Mallett

<p>Section 102 of the Sentencing Act 2002 gives judges’ only limited discretion when sentencing for stage-1 murder: the discretion to rebut the presumption of life imprisonment in circumstances where the sentence would otherwise be “manifestly unjust”. This is a high threshold, and the Court of Appeal has said that it will be met only in exceptional cases. The judgment in R v Cunnard is the first time that a person who derived their conviction of murder from a principal offender has had the presumption displaced, and this essay explores whether or not this decision has lowered the threshold to establish manifest injustice. Although Miller J’s judgment conforms to the common features that exist in the few cases where the presumption has been successfully displaced, it is not without criticism. There are issues as to whether an overall assessment of the circumstances of the offence and the offender were made, as well as significant concerns regarding the emphasis the judge placed on sentence parity between co-offenders.</p>


2021 ◽  
Author(s):  
◽  
Stella Kasoulides Paulson

<p>This paper examines the proposition that general anti-avoidance rules achieve their purpose better when drafted in broad terms. Several jurisdictions have included misuse and abuse requirements in their GAARs in order to provide certainty and a high threshold for the GAAR’s operation. Others have enumerated their GAAR to add precision and certainty to its terms. While misuse and abuse requirements and enumeration have the appearance of adding precision to an uncertain area of law, in practice this is doubtful. The general anti-avoidance provisions of four jurisdictions are compared, namely Australia, Canada, New Zealand and the United Kingdom. This article comes to two conclusions; that adding a misuse and abuse requirement to a GAAR does not significantly alter the substance of the inquiry; and that adding further details and precisions to a GAAR does more harm than good. These two conclusions promote the main proposition of this paper, that general anti-avoidance rules work best when drafted in broad terms. The international trend is heading towards more enumerated general anti-avoidance provisions; this paper aims to counter some of the arguments in favour of that trend.</p>


2021 ◽  
Author(s):  
◽  
Stella Kasoulides Paulson

<p>This paper examines the proposition that general anti-avoidance rules achieve their purpose better when drafted in broad terms. Several jurisdictions have included misuse and abuse requirements in their GAARs in order to provide certainty and a high threshold for the GAAR’s operation. Others have enumerated their GAAR to add precision and certainty to its terms. While misuse and abuse requirements and enumeration have the appearance of adding precision to an uncertain area of law, in practice this is doubtful. The general anti-avoidance provisions of four jurisdictions are compared, namely Australia, Canada, New Zealand and the United Kingdom. This article comes to two conclusions; that adding a misuse and abuse requirement to a GAAR does not significantly alter the substance of the inquiry; and that adding further details and precisions to a GAAR does more harm than good. These two conclusions promote the main proposition of this paper, that general anti-avoidance rules work best when drafted in broad terms. The international trend is heading towards more enumerated general anti-avoidance provisions; this paper aims to counter some of the arguments in favour of that trend.</p>


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