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For any real number y, let [y] be the largest integer not exceeding y. Petrov and Tolev conjectured that there exists a constant c 0 > 1 such that if 1 < c < c 0 , then every sufficiently large natural number N can be represented as N = [ p c ] + [ m c ] , where p is a prime and m is a natural number having at most 2 prime factors. And, they proved that when c is close to 1, specifically when 1 < c ≤ 1485 / 1484 = 1.00067 ⋯ , every sufficiently large natural number N can be represented as N = [ p c ] + [ m c ] with m having at most 53 prime factors. In this paper, we show that if 1 < c ≤ 1.0198 , then every sufficiently large natural number N can be written as N = [ p c ] + [ m c ] , where p is a prime and m is a natural number having at most 10 prime factors. This improves the result of Petrov and Tolev. [ABSTRACT FROM AUTHOR]

Copyright of Ankara Üniversitesi Dil ve Tarih-Cografya Fakültesi Dergisi DTCF Dergisi is the property of Ankara Universitesi Dil ve Tarih-Cografya Fakultesi (DTCF Dergisi) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper extends the threshold regression to threshold effect in varying coefficient model. We allow for either cross-section or time series observations. Estimation of the regression parameters is considered. An asymptotic distribution theory for the regression estimates (the threshold and the regression slopes) is developed. The distribution of threshold estimates is found to be non-standard. Under some sufficient conditions, we show that the proposed estimator for regression slopes is root-n consistent and asymptotically normally distributed, and that the proposed estimator for the varying coefficient is consistent and also asymptotically normal distributed but at a rate slower than root-n. Consistent estimators for the asymptotic variances of the proposed estimators are provided. Monte Carlo simulations are presented to assess the performance of the asymptotic approximations. The empirical relevance of the theory is illustrated through an application to the relationship between environmental regulation and regional technological innovation study. [ABSTRACT FROM AUTHOR]

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The battery component with the most important role is the separator. The separator is used as a battery cell to store a source of electricity and separate the cathode and anode. The separator in a battery is often damaged because its material is easily crushed or broken. This study aimed to create a new separator cell using a porous ceramic made from a mixture of zeolite sand and corn flour. This porous ceramic as a battery separator is sought to increase the ionic conductivity and thermal stability of the battery. The ceramic is divided into 4 grain size variables, namely grain size using 100; 30; and 16mesh sieves and grain size without using a sieve, or coarse grain. The making process begins with zeolite sand sifting. The sifted zeolite is then mixed with corn flour. The composition of the mixing is 92 % zeolite and 8 % corn flour. The resulting porous ceramics are assembled onto batteries. The finished batteries are then tested for mains voltage. The porous ceramics are micro-photo tested. The results of the stress test show that the 100-mesh sieve zeolite variation has a voltage of 3.97 volts, the 30-mesh sieve zeolite variation has a voltage of 3.72 volts, and the 16-mesh sieve zeolite variation has a voltage of 3.43 volts. Furthermore, the results of the micro-photo test show that for the 100-mesh sieve zeolite variation, the pores are relatively tight; for the 30mesh sieve zeolite variation, there are several more pores when compared to the 100mesh sieve; and for the 16mesh sieve zeolite variation, the most (largest) pores among the three grain size variables are found. [ABSTRACT FROM AUTHOR]

The sieve of Eratosthenes is a method for finding all the prime numbers less than some maximum value M by repeatedly removing multiples of the smallest remaining prime until no composite numbers less than or equal to M remain. The sieve provides a means of partitioning the natural numbers. We examine this partition and derive an expression for the densities of the constituent "Eratosthenes sets". The densities must sum to unity, yielding an interesting result, equation (14), that may be new. [ABSTRACT FROM AUTHOR]

In this work and its sister paper (Friedlander and Iwaniec (2023)), we give a new proof of the famous Linnik theorem bounding the least prime in an arithmetic progression. Using sieve machinery in both papers, we are able to dispense with the log-free zero density bounds and the repulsion property of exceptional zeros, two deep innovations begun by Linnik and relied on in earlier proofs. [ABSTRACT FROM AUTHOR]

IntroductionPeanut (Arachis hypogaea L.) is an annual plant of the legume genus that is cultivated in 109 countries due to its high-quality oil and seed protein. In Iran, this crop is cultivated on an area of 3000 hectares, with an average yield of 4 tons per hectare. Threshing performance significantly affects seed loss and physical damage, including cracking and crushing of seeds during harvest. Therefore, over the last century, extensive research has been conducted on different types of threshing methods, as well as the design and development of various threshing machines.Research on seed crops such as cereals and seeds suggest that factors such as the rotational speed of the thresher, threshing-concave distance, feeding rate, and shape of threshing teeth play a crucial role in determining the threshing efficiency and quality of the threshed seeds. Although limited research has been conducted on peanut threshing, there are currently no combine-machines available for this crop on global markets. Therefore, this study aims to investigate several working parameters of an experimental peanut thresher, including the effect of sieve angle, sieve range of movement, and suction speed on the separation unit.Materials and MethodsThe relevant experiments were conducted in the Parsabad Moghan region of Ardabil province (latitude 39.65 North, longitude 47.91 East). To conduct the experiments and separate the seeds from the pods, we used a peanut threshing machine cultivar Nc2, which is commonly cultivated under agricultural conditions in Ardabil and Gilan Agricultural Research Centers.To achieve the aims of this research, we investigated several effective parameters in the performance of the machine, including sieve angle, sieve movement range, and fan suction speed, to obtain the best settings for maximum threshing performance and separation efficiency. It is worth noting that the average seed weight per kilogram of peanut plant was between 300-400 grams, and the moisture content of the seeds in the tested cultivar was 45%. Before using the machine, workers must first dig up the plants and place them on the ground in a coupe, after which another worker must feed the plants into the machine through the feeder.Results and DiscussionThe study found that changes in sieve angle, sieve movement range, and suction speed significantly affect the separation efficiency and peanut loss rate at a 1% significance level. Increasing the sieving angle leads to a higher speed of material movement on the sieve, which results in insufficient time for separating straw from the seed. Similarly, increasing the sieve movement range causes a rapid decrease in cleaning efficiency. To achieve better straw-seed separation, it is necessary to apply impact shocks to the products located on the sieve within a short period. However, as the range of movement increases, the time interval between impact shocks also increases, which disrupts the straw's separation from the seed.The study found that increasing the sieve range and suction speed leads to a higher rate of peanut loss. This is due to the fact that when the suction speed and sieve movement range are increased, the product spends less time on the sieve, which results in insufficient time for proper separation. Additionally, high speed may exceed the limit of peanut seed and cause it to move out of the machine with the straw. Increasing the sieve movement range leads to a more uniform movement of straw and seed on the sieve; however, achieving better separation of straw from the sieve requires dynamic shocks and sudden acceleration, which decreases as the sieve movement range increases. The optimal farm capacity and material capacity were achieved with a 5-degree slope at 0.55 hectares per hour and 509 kilograms per hectare, respectively, using a sieve range of 3.5 centimeters and a fan suction speed of 8 meters per second.ConclusionThe study concluded that the sieve movement range has the most significant impact on cleaning efficiency, while the sieve angle has the least effect. Similarly, the sieve movement range has the most significant influence on the rate of peanut loss, while the sieve angle has the least effect.

Exposure to flour dust remains one of the leading causes of occupational asthma in Great Britain (GB). The average annual incidence rate per 100,000 bakers and flour confectioners in GB was 47.8 for the 3 yr period 2017 to 2019 compared with 0.53 for all occupations. There are many processes in commercial bakeries that can cause exposure to flour dust. Exposures are typically controlled by using local exhaust ventilation or respiratory protective equipment. The aim of this study was to evaluate the potential to reduce exposure to inhalable flour dust in commercial bakeries by modification of the process by use of a conical sieve in place of a round sieve; and substitution of traditional wheat flour (TWF) with 'low dust' flours LD1 and LD2 for dusting surfaces. Two simulated commercial bakery tasks were performed in a laboratory whilst dust exposures were measured in the breathing zone of the operator using an Institute of Occupational Medicine (IOM) sampler, button sampler and a real-time direct reading monitor. Analysis of variance tests were used to assess whether differences in mean exposures were statistically significant with the different control approaches. A qualitative visual exposure assessment was also undertaken using Tyndall illumination. Substituting TWF with LD1 and LD2 reduced exposure to inhalable flour dust by 86% and 53% respectively when sieving and by 78% and 67% respectively when filling a hopper. There was no statistically significant difference between dust emissions for all 3 flours when using the conical sieve instead of the round sieve for flour dusting tasks. This laboratory study has shown that substituting TWF with low-dust flour may reduce inhalable dust exposures when dusting surfaces in bakeries. [ABSTRACT FROM AUTHOR]

Introduction Peanut (Arachis hypogaea L.) is an annual plant of the legume genus that is cultivated in 109 countries due to its high-quality oil and seed protein. In Iran, this crop is cultivated on an area of 3000 hectares, with an average yield of 4 tons per hectare. Threshing performance significantly affects seed loss and physical damage, including cracking and crushing of seeds during harvest. Therefore, over the last century, extensive research has been conducted on different types of threshing methods, as well as the design and development of various threshing machines. Research on seed crops such as cereals and seeds suggest that factors such as the rotational speed of the thresher, threshing-concave distance, feeding rate, and shape of threshing teeth play a crucial role in determining the threshing efficiency and quality of the threshed seeds. Although limited research has been conducted on peanut threshing, there are currently no combine-machines available for this crop on global markets. Therefore, this study aims to investigate several working parameters of an experimental peanut thresher, including the effect of sieve angle, sieve range of movement, and suction speed on the separation unit. Materials and Methods The relevant experiments were conducted in the Parsabad Moghan region of Ardabil province (latitude 39.65 North, longitude 47.91 East). To conduct the experiments and separate the seeds from the pods, we used a peanut threshing machine cultivar Nc2, which is commonly cultivated under agricultural conditions in Ardabil and Gilan Agricultural Research Centers. To achieve the aims of this research, we investigated several effective parameters in the performance of the machine, including sieve angle, sieve movement range, and fan suction speed, to obtain the best settings for maximum threshing performance and separation efficiency. It is worth noting that the average seed weight per kilogram of peanut plant was between 300-400 grams, and the moisture content of the seeds in the tested cultivar was 45%. Before using the machine, workers must first dig up the plants and place them on the ground in a coupe, after which another worker must feed the plants into the machine through the feeder. Results and Discussion The study found that changes in sieve angle, sieve movement range, and suction speed significantly affect the separation efficiency and peanut loss rate at a 1% significance level. Increasing the sieving angle leads to a higher speed of material movement on the sieve, which results in insufficient time for separating straw from the seed. Similarly, increasing the sieve movement range causes a rapid decrease in cleaning efficiency. To achieve better straw-seed separation, it is necessary to apply impact shocks to the products located on the sieve within a short period. However, as the range of movement increases, the time interval between impact shocks also increases, which disrupts the straw's separation from the seed. The study found that increasing the sieve range and suction speed leads to a higher rate of peanut loss. This is due to the fact that when the suction speed and sieve movement range are increased, the product spends less time on the sieve, which results in insufficient time for proper separation. Additionally, high speed may exceed the limit of peanut seed and cause it to move out of the machine with the straw. Increasing the sieve movement range leads to a more uniform movement of straw and seed on the sieve; however, achieving better separation of straw from the sieve requires dynamic shocks and sudden acceleration, which decreases as the sieve movement range increases. The optimal farm capacity and material capacity were achieved with a 5-degree slope at 0.55 hectares per hour and 509 kilograms per hectare, respectively, using a sieve range of 3.5 centimeters and a fan suction speed of 8 meters per second. Conclusion The study concluded that the sieve movement range has the most significant impact on cleaning efficiency, while the sieve angle has the least effect. Similarly, the sieve movement range has the most significant influence on the rate of peanut loss, while the sieve angle has the least effect. [ABSTRACT FROM AUTHOR]

A sieve machine is used to separate groups of granules based on size. Most separation sieves on two groups of sifted/filtered grains move immediately, but the unfiltered grains are removed by the operator turning the sieve sideways or lifting the unfiltered material. In addition, the sifted material is usually poured directly on the sieve wire. This slows the sifting process, and the buildup can damage the sieve. On the other hand, sieve materials, such as corn rice products, require two sizes of sieve wire holes. Design, make, and study the function, "The Sieve Machine's two-channel Equipped with Directions for Rice Corn". The specification of the sieve machine is as follows; it has two sifting channels, the sieve filter can be replaced, a swing arm drives the filter, the dynamo operates on 3/4 hp, rotation 1400 rpm, the capacity for one stage is ± 44.8 kg/hour, the capacity for corn rice ± 22 kg/hour (it's time to change the sieve). The study of engine performance on several variables showed that the smaller the lightening angle, the capacity increases; it is inversely proportional to the length of the spring and rotation. At angle 50 sieve capacity is 23.3 kg/hour, with the length of the spring being 90.5 mm, and on the size of the spring becoming 100.5 mm, the sieva capacity of 24.6 kg/hour. For angle 150, the capacity is reduced by 20.4 kg/hour. At rotation 230 rpm, 50 angles, decreased capacity, only 20.3 kg/hour, spring length 90.5 mm

The sieve, as a household item, plays an important role in the ritual life of a person. The word "sieve" has a rich phraseological use, which reveals the ambiguity and miraculous properties of the household item in question. The sieve, associated with the sky and closely associated with the heavenly bodies, the sun, the moon, the stars, is widely used in the folk and Christian system of holidays, beliefs and has its numerous manifestations in Armenian folklore. The sieve, as a miraculous object, is used in the belief system of the people, in the rain making rite, folk medicine and magic. In some ethnographic regions of Armenia, divination is done with the help of a sieve. One of these actions, "placing an arrow", is practiced in Shirak to this day. [ABSTRACT FROM AUTHOR]

It is stated that the secondary processing can achieve a lot of advantages in order to stagnate and produce a cheap source of rich materials, raw materials and non-natural materials. In addition, it is clear that having been squandered into too much of a middle ground, the outputs of mankind’s technogenic activities are likely to become problematic. On the other hand, the natural resources of our planet are limited and are constantly being used up and cannot be replenished in terms equal to the hour of the founding of civilization. Also considered are the products that involve the processing of glass containers for repeated recovery through turning around the outputs of the production process. And you yourself will have to achieve the goal of using a second-grade glass container when selecting a glass for new dances. Slo is a material that is widely used in the manufacture of windows, dishes, packaging and other items. This is due to its versatility, clarity and ability to melt at high temperatures. The melting temperature of the warehouse varies from 650 to 1500 ⁰C in storage of components. The melted layer becomes viscous, making it easy to process and create new products. One of the key aspects is that the recycling of tableware is significant, it is an environmental benefit. Stain, as a non-collapsible material, can accumulate on waste materials and in nature for a decade, causing damage to the environment. Reprocessing broken glass into new processes can significantly change the quantity of outputs that go to waste disposal plants and in combustion plants. This emits a change in carbon dioxide, which is seen when a new glass is formed from the original cheese. In addition to environmental benefits, recycling of warehouses can also be a significant economic benefit. The production of raw materials from raw materials requires significant expenditure of energy and resources. The process of recycling broken glass can be 40% cheaper compared to the production of new warehouse. This is due to the smaller amount of energy required to melt the already formed material, and to the smaller amount of vicorized ore. In addition, warehouse processing can create new opportunities for business and development. Enterprises that specialize in the collection and processing of waste products create work places and promote the development of the local economy. Also, recycling of waste is of great importance both for the environment and for the economy. Replacement of primary resources, reduction of waste and creation of new opportunities for the recovery of outputs - this is only a step from the advantages that the processing of warehouses provides. In general, this process plays an important role in the creation of a more environmentally friendly society. The article describes a section of the line for sorting glass dances by color and recycling them using the method of further processing and recycling. The length of the line consists of the following sequentially expanded machines: a stitch conveyor, a crusher of cursed dances (2 pcs), a straight sleeve, a screw conveyor (2 pcs). Stitch conveyor is used for transporting and sorting dances into dances from a clear fold, for example, from dances filled with barnyard in green colors. The crusher is intended for fine graining and sifting through a sieve, which can be replaced in storage according to the required size of the granular glass. Stored under 50...60 0, screw conveyors are used for transporting the detailed warehouse with the method of further packaging in containers and delivery to the production site for the production of cursed dances. The armchair was dismantled and the anterior debranching was carried out. [ABSTRACT FROM AUTHOR]

This article extends spatial autoregressive model with spatial autoregressive disturbances (SARAR(1,1)) which is the most popular spatial econometric model to the case of an arbitrary finite number of nonparametric additive terms and spatial autoregressive models with spatial autoregressive disturbances of arbitrary finite order (SARAR(R,S)). We propose a sieve two-stage least squares (S2SLS) regression and generalized method of moments (GMM) procedure of the high-order spatial autoregressive parameters of the disturbance process. Under some sufficient conditions, we show that the proposed estimator for the finite dimensional parameter is n consistent and asymptotically normally distributed. We show that each proposed estimator for the additive terms is consistent and also asymptotically normally distributed at a rate slower than n. Consistent estimators for the asymptotic variances of the proposed estimators are provided. In addition, using asymptotic properties to make statistical inference for the parametric and additive is also considered. Monte Carlo evidence suggests that the estimation procedure performs reasonably well in small samples and the proposed approach has some practical value. The proposed method is applied to analyzing factors which affect haze pollution. [ABSTRACT FROM AUTHOR]

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: To improve the separation efficiency of constricted clam shell and meat. Methods: Taking Lianyungang double-headed razor as the test object, taking frequency, amplitude, and sieve surface inclination as the test factors, and taking the screening efficiency and the ratio of the shell in the meat as the main control targets, a single-factor test was carried out, and the test results were analyzed by Design-Expert software. An analysis of variance was performed to establish a regression model matching the frequency, amplitude, and inclination of the screen surface to the screening efficiency and the ratio of husks in the meat. Using the response surface optimization analysis method, the optimal matching of working parameters for the separation and screening device of constricted razor shell and meat was obtained. Results: When the discharge rate was controlled at 1.2 kg/s, the shell opening rate was controlled at 97%, the frequency was set at 21.6 Hz, the amplitude was set at 3.6 mm, and the screen inclination angle was set at 9°, the screening efficiency of constricted razor was improved, with the screen efficiency of 97.60%, and the shell-on ratio of the meat of 4.52%. Conclusion: The designed vibrating screening device for constricted razor has high screening efficiency and good adaptability, which can meet the preliminary processing requirements.

Striped Venus clam (Chamelea gallina) fishery is intensively carried out on the Black sea coast of Turkey using a hydraulic dredge. For this reason, this study aimed to determine the selectivity of the spiral sieves used in this fishery and the factors affecting the selectivity depending on the structure of the sieve. Samplings were carried out on the coast of the South Black sea onboard a commercial clam vessel from 3 to 15 December 2019. The covered codend method was applied, and the between haul variations were taken into account by using CC2000 and ECmodel software. Thus, the L50 results of the Standard Sieving Process (SSP), Cycle per minute (CPM), and Flow rate (FR) were determined as 15.17 mm, 15.49 mm, and 17.06 mm, respectively. Besides, only one factor (FR) affects selectivity. The SR values were found to be quite high for all sieving processes. The proportion of individuals below the minimum legal size in landed catches was determined as quite high. Therefore, the design of a new different sorting sieve system would be more appropriate for striped Venus clam fishery. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Polytechnic is the property of Journal of Polytechnic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This Paper discusses the Paradox in the Novel: "Taghreebatu Qariyeh", ( A Village Agony), written by Mohammad Obeidat, in which the incidences took place in Kafr Soum village, at the northern part of Jordan, and the ordeal that befell it and its people, following the burning of the sieve that United States installed for some villages around there, as a result of protesting against the Baghdad Pact, then it was punished again after some years when people demonstrated and called for unity with Egypt and Syria, influenced by the nationalist movement in the sixties of 20th century. This paper focuses on a specific aspect of a novel, that is the paradox. It defines the novel then moves on to present the various definitions of the paradox, and refers to its examples. This paper concludes that the novel was based on a paradoxical structure and exploited it through a capable and conscious style, due to the importance of such function in the novel construction, and addressed a message by the writer which was: condemnation of what had happened and what is happening now, then impeded these incidences in the minds of young and new generation, so he discovered what they needed in the paradox that revealed much of what the victims had hidden. [ABSTRACT FROM AUTHOR]

Aiming at the current problem of the high rate of impurity and loss in the cleaning device of corn seed harvesters in China, this paper took the cleaning device of 4YZL-6 self-propelled corn seed harvester as a sample and analyzed the movement law of the material on the sieve. Box-Behnken response surface experimental design theory was used for the orthogonal tests. Wind inlet angle, airflow velocity, and crank angular velocity were selected as influencing factors, and the impurity rate and loss rate as the evaluation index of operation quality. A regression mathematical model between each influencing factor and indicator was established, and the model was also integrated and optimized. The optimal parameter combination was obtained as follows: the wind inlet angle was 37.95o, the airflow velocity was 11.3 m/s, and the crank angular velocity was 4.1 r/s. The corresponding impurity rate was 0.87% and the loss rate was 0.34%. Verification tests were conducted on the optimization results, and the test results showed that under the optimal combination of parameters, the impurity rate was 0.89% and the loss rate was 0.35%. The relative errors of each evaluation index and its model prediction were 2.29% and 2.94%, respectively. [ABSTRACT FROM AUTHOR]

Various vibrating screens are often applied in various industries, e.g., mining, agriculture, and others. The complex shapes of the screen trajectories in the oscillating motion strongly affect the best processing properties of such machines. One of the possible methods for obtaining such complex shapes is the application of double-frequency vibrators on such screens. The goal of the present study was to analyze the dynamical behavior of the prototype sifter sieve elaborated. The simulation model of such a sifter sieve and the research stand for studies on its sifter trajectories were elaborated. Simulations of sifter motion were conducted, and their results were compared with those obtained from measurements on the research stand. The recommendations as to the frequency ratio of vibrators enabling obtaining a high complexity of sieve movement have been formulated and included in the paper. Particularly, the multiple of the value equal to one third for the ratio of angular velocities under their reverse synchronization for two rotary vibrators exciting the screen analyzed was the best among all analyzed values of such a ratio. [ABSTRACT FROM AUTHOR]

The paper describes archaeological excavations in the Bandkeramik settlement of Olteni in Transylvania. Remains of early Neolithic longhouses were discovered, which are the first evidence of such structures in Romania. The ceramic finds allow dating the site to the later Notenkopf phase of the Linearbandkeramik. In addition, Olteni yielded the most extensive collection of anthropomorphic and zoomorphic sculptures in the entire Eastern Bandkeramik milieu. The excavations also included traces of the Boian and Precucuteni I cultures, as well as an Iron Age cemetery. [Extracted from the article]

Constructing solid electrolyte interphase (SEI) layer is a highly desirable strategy to tackle Zn dendrite and side reactions. However, sluggish diffusion kinetics of Zn2+ within SEI layer limits the high-current performance of Zn anodes. Herein, multifunctional SiO 2 dense nanopore sieves are synthesized to protect Zn anodes. It mitigates corrosion and hydrogen evolution, increases exchange current density and Zn2+ transference number, and reduces activation energy and nucleation overpotential. The cycling lifespan of symmetrical cells is extended to 4000 h at 10 mA cm−2/1 mAh cm−2, 500 h at 20 mA cm−2/1 mAh cm−2, 232 h at 50 mA cm−2/1 mAh cm−2. Coulombic efficiency of asymmetrical cell is increased to 99.78 % after 7679 cycles at 5 mA cm−2/1 mAh cm−2. In Zn//MnVO full cells, SiO 2 dense nanopore sieve significantly enhances cycling stability and rate capability, achieving a reversible capacity of 76 mAh g−1 after 1000 cycles at 3 A g−1. As evidenced experimentally and theoretically, SiO 2 dense nanopore sieve facilitates efficient and homogeneous transport of high-flux Zn2+, eliminates water-mediated parasitic reactions, and shields SO 4 2−/OH− anions, resulting in dendrite-free, uniform and reversible Zn deposition with a preferred Zn (002) orientation. This is attributed to unique dense nanopores, hydroxyl groups and surface negative charges. • SiO 2 dense nanopore sieve is presented as a SEI protective layer for Zn anode. • Dense nanopores enable the swift uniform transport of high-flux Zn2+ ions. • Highly hydrophilic hydroxyl groups aid in desolvation and dehydration. • Negative surface charges induce an electrostatic shielding effect against SO 4 2− ions. [ABSTRACT FROM AUTHOR]

In the agroindustry, sieving is a unit operation of great value, this work aims to make a literature review on sieving in cereals, a search equation was carried out in the Scopus database with the keywords sieve, screen, food process, and cereal that resulted in 132 articles and 174 patents. Of the articles, 44 were directly related to sieving and 14 more had something to do with sieving; of the patents, in the last 10 years only 7 were directly related to sieving. To find new trends, raw materials, patent analysis, and information analysis, tables were built with name, year, author, keywords, countries, quartile, journal, relationship with the agroindustry, and purpose. Among the most important conclusions was the application of sieving in raw materials such as Rice, Corn, Wheat, Cotton, Millet, Quinoa, Almonds, Barley, Potato, Yucca, Microorganisms, Oats, Cotton, Protein, Peppers, and Chia Seed. Furthermore, the use of rotating and vibrating sieves was identified, and also their positive effects on the physicochemical, standardization, and classification of raw materials were identified. The different types of equipment or methods focused on sieving, that has been granted use or design patent, were also recognized.

Semantics is meaning communicated through language (Saeed I.J.). Semantics is the study of relationship between words and their meanings; it is directly linked with the conceptual meaning of words, and the associative meaning. Semantic sieve as a concept is an innovative phenomenon. This linguistic phenomenon is a process whereby a word is dispersed through a semantic tunnel which in some cases produces different meaning. This is explained through different models. The semantic sieve is related to translation, where the deep structure of words differs from the surface structure. There are some concepts and words in Akan and English that are absent in Russian, others are known in Akan but virtually absent in the English language.

As a composer and theorist, Iannis Xenakis has raised the level and quality of mathematics involved in music to unprecedented heights. He inspired generations of composers and also stimulated research and development in the theory of music. The present paper explores how influential some of his ideas have proved to be in numerous domains. [ABSTRACT FROM AUTHOR]

Recently, Li (Int J Number Theory, 2020) obtained an asymptotic formula for a certain partial sum involving coefficients for the polynomial in the First Borwein conjecture. As a consequence, he showed the positivity of this sum. His result was based on a sieving principle discovered by himself and Wan (Sci China Math, 2010). In fact, Li points out in his paper that his method can be generalized to prove an asymptotic formula for a general partial sum involving coefficients for any prime p > 3 . In this work, we extend Li's method to obtain asymptotic formula for several partial sums of coefficients of a very general polynomial. We find that in the special cases p = 3 , 5 , the signs of these sums are consistent with the three famous Borwein conjectures. Similar sums have been studied earlier by Zaharescu (Ramanujan J, 2006) using a completely different method. We also improve on the error terms in the asymptotic formula for Li and Zaharescu. Using a recent result of Borwein (JNT 1993), we also obtain an asymptotic estimate for the maximum of the absolute value of these coefficients for primes p = 2 , 3 , 5 , 7 , 11 , 13 and for p > 15 , we obtain a lower bound on the maximum absolute value of these coefficients for sufficiently large n. [ABSTRACT FROM AUTHOR]

A strainer is an autonomous utensil (sieve or colander) or an integral part (filter) of a utensil designed to separate mixtures based on grain size. In the southern Levant, strainer vessels made of clay are known since the Early Chalcolithic period, albeit few in number. The onset of the Late Chalcolithic period reflects a significant increase in the numbers and distribution of these particular vessels even though their numbers per site remain relatively low. This paper surveys foremost Late Chalcolithic strainer vessels from the southern Levant, discussing their morphology, significance and possible role as straining and sifting devices for liquids (e.g., olive or other oils, herbal or botanical mixtures, and alcoholic beverages) and solid substances (e.g., fats and flour). While results from our ongoing organic residue analysis concerning this and other types of Late Chalcolithic vessels are yet to come, we can already suggest that these vessels entail a variety of tasks and that they were used in a number of different contexts based on the variability of strainer vessel types and the strainer morphology. [ABSTRACT FROM AUTHOR]

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Digital (droplet) microfluidics (DμF) is a powerful platform for automated lab-on-a-chip procedures, ranging from quantitative bioassays such as RT-qPCR to complete mammalian cell culturing. The simple MEMS processing protocols typically employed to fabricate DμF devices limit their functionality to two dimensions, and hence constrain the applications for which these devices can be used. This paper describes the integration of vertical functionality into a DμF platform by stacking two planar digital microfluidic devices, altering the electrode fabrication process, and incorporating channels for reversibly translating droplets between layers. Vertical droplet movement was modeled to advance the device design, and three applications that were previously unachievable using a conventional format are demonstrated: (1) solutions of calcium dichloride and sodium alginate were vertically mixed to produce a hydrogel with a radially symmetric gradient in crosslink density; (2) a calcium alginate hydrogel was formed within the through-well to create a particle sieve for filtering suspensions passed from one layer to the next; and (3) a cell spheroid formed using an on-chip hanging-drop was retrieved for use in downstream processing. The general capability of vertically delivering droplets between multiple stacked levels represents a processing innovation that increases DμF functionality and has many potential applications.

J. Kubilius developed the model for transferring the problems related to the value distributions of arithmetical functions to those for independent random variables. The key step consists of approximation of number-theoretic frequencies by probabilistic measures using the sieving methods. We present a sieve result for rational numbers as an analogue of that in the Kubilius model. [ABSTRACT FROM AUTHOR]

Deceased human remains are often buried as a forensic countermeasure or method of disposal by homicide perpetrators. Owing to this, the excavation of clandestine grave sites is a task that forensic crime scene teams may only encounter a few times a year. Not all crime scene units have specialised teams for this task, and even those that do, may not have specific protocols for the optimal recovery of forensic traces retained within grave fill as procedures such as sieving require optimisation for the specific soil conditions of the jurisdiction. This study aimed to define the optimal sieving conditions for a sandy environment when searching for minute traces of paint, glass, hair and fibres. Furthermore, this study justifies the practice of retaining grave fill and examining it under controlled laboratory conditions, rather than in-situ adjacent to the grave site. The results demonstrate that using sieve mesh sizes as fine as 0.1 mm can recover up to 82% of the deposited traces and almost all paint, hair and glass traces. The processing of grave fill in the laboratory lead to increased yield of forensic evidence, which on a case-basis may warrant the increased time needed. These findings merit consideration for clandestine grave crime scenes where evidence is scarce or the case is likely to become cold. • With sieve mesh sizes as fine as 0.1 mm, up to 82% of deposited traces were recovered. • Retaining grave fill and examining in a laboratory environment improved recovery of traces. • Almost all traces were recovered from grave fill using 0.5 mm sieve mesh. [ABSTRACT FROM AUTHOR]

INTRODUCTION: In the face of sudden events with many victims, various types of medical segregation systems were created. Their aim is to set the treatment and transport priority of patients by giving them appropriate urgency codes considering their general condition and vital parameters. The study is aimed at comparing the effectiveness of selected medical segregation systems. MATERIAL AND METHODS: The research tool consisted of one hundred virtual patients, whose condition was categorized according to the START system (Simple Triage and Rapid Treatment) for four urgency codes - 25 persons for each of four categories. Then they were segregated by assigning the wounded to individual urgency codes using the SIEVE and CAREFLIGHT systems. To the statistical analysis was used the Mann-Whitney U test. All results were considered significant at p

Various vibrating screens are often applied in various industries, e.g., mining, agriculture, and others. The complex shapes of the screen trajectories in the oscillating motion strongly affect the best processing properties of such machines. One of the possible methods for obtaining such complex shapes is the application of double-frequency vibrators on such screens. The goal of the present study was to analyze the dynamical behavior of the prototype sifter sieve elaborated. The simulation model of such a sifter sieve and the research stand for studies on its sifter trajectories were elaborated. Simulations of sifter motion were conducted, and their results were compared with those obtained from measurements on the research stand. The recommendations as to the frequency ratio of vibrators enabling obtaining a high complexity of sieve movement have been formulated and included in the paper. Particularly, the multiple of the value equal to one third for the ratio of angular velocities under their reverse synchronization for two rotary vibrators exciting the screen analyzed was the best among all analyzed values of such a ratio.

This research is motivated by discovering and underpinning genetic causes for the progression of a bilateral eye disease, age-related macular degeneration (AMD), of which the primary outcomes, progression times to late-AMD, are bivariate and interval-censored due to intermittent assessment times. We propose a novel class of copula-based semiparametric transformation models for bivariate data under general interval censoring, which includes the case 1 interval censoring (current status data) and case 2 interval censoring. Specifically, the joint likelihood is modeled through a two-parameter Archimedean copula, which can flexibly characterize the dependence between the two margins in both tails. The marginal distributions are modeled through semiparametric transformation models using sieves, with the proportional hazards or odds model being a special case. We develop a computationally efficient sieve maximum likelihood estimation procedure for the unknown parameters, together with a generalized score test for the regression parameter(s). For the proposed sieve estimators of finite-dimensional parameters, we establish their asymptotic normality and efficiency. Extensive simulations are conducted to evaluate the performance of the proposed method in finite samples. Finally, we apply our method to a genome-wide analysis of AMD progression using the Age-Related Eye Disease Study data, to successfully identify novel risk variants associated with the disease progression. We also produce predicted joint and conditional progression-free probabilities, for patients with different genetic characteristics. [ABSTRACT FROM AUTHOR]

We show that a positive proportion of the primes have the property that if any one of its digits in base 10, including its infinitely many leading 0 digits, is replaced by a different digit, then the resulting number is composite. [ABSTRACT FROM AUTHOR]

In this paper, we derive some formulae involving coefficients of polynomials which occur quite naturally in the study of restricted partitions. Our method involves a recently discovered sieve technique by Li and Wan (2010) [12]. Based on this method, by considering cyclic groups of different orders we obtain some new results for these coefficients. The general result (see Theorem 4.1) holds for any group of the form Z N where N ∈ N and expresses certain partial sums of coefficients in terms of expressions involving roots of unity. By specializing N to different values, we see that these expressions simplify in some cases and we obtain several nice identities involving these coefficients. We also use a result of Sudler (1964) [17] to obtain an asymptotic formula for the maximum absolute value of these coefficients. [ABSTRACT FROM AUTHOR]

In this article, we describe the implementation of fitting partially linear functional-coefficient panel models with fixed effects proposed by An, Hsiao, and Li [2016, Semiparametric estimation of partially linear varying coefficient panel data models in Essays in Honor of Aman Ullah (Advances in Econometrics, Volume 36)] and Zhang and Zhou (Forthcoming, Econometric Reviews). Three new commandsxtplfc, ivxtplfc, and xtdplfc are introduced and illustrated through Monte Carlo simulations to exemplify the effectiveness of these estimators. [ABSTRACT FROM AUTHOR]

Abstract In this study we investigated the distribution of Macrobrachium olfersii (Wiegmann, 1836) along ~150 km of the Ribeira de Iguape river, São Paulo, Brazil. We compared the abundance and spatio-temporal distribution, and checked for differences in size and proportion of each sex in the collections, using two sampling methods. Shrimps were collected monthly at four sites (Eldorado, Sete Barros, Registro, and Iguape), from January to December 2007, using traps and sieves. We obtained a total of 23,818 individuals. The abundance was significantly higher at the Iguape-site, which was the closest to the estuary. There was a positive cross-correlation between abundance and rainfall, indicating an increase in abundance with a decrease in rainfall. The body size increased significantly upstream, suggesting a juvenile upstream migration, controlled by the rainfall regime and the amphidromous behavior of M. olfersii. More than 95% of the individuals were captured by sieving through the marginal vegetation of the river. The average size and sex ratio of each sample varied depending on the capture method: traps captured more and larger males than the sieve. Therefore, we recommend the combined use of these methods to obtain a better coverage of the population biology of freshwater shrimps.

Different designs of separators are used for separating seeds. The principle of separator operation is based on various physical, mechanical and aerodynamic properties of seeds. Gravitational separators are promising because energy is not spent on separation process in this type of separators. A gravity-cascade separator was proposed, in which the separator sections are connected like “scissors”. The sieve length was theoretically justified, taking into account the condition for passing a small fraction of seeds into the sieve holes. The influence of sieves tilt angle and seed flow rate from hopper on the quality index of separation process was studied experimentally. [ABSTRACT FROM AUTHOR]

Denote by P the set of all primes and by P + (n) the largest prime factor of integer n ⩾ 1 with the convention P + (1) = 1. For each η > 1 , let c = c (η) > 1 be some constant depending on η and P a , c , η : = { p ∈ P : p = P + (q − a) for some prime q with p η < q ⩽ c (η) p η }. In this paper, under the Elliott-Halberstam conjecture we prove, for y → ∞ , π a , c , η (x) : = | (1 , x ] ∩ P a , c , η | ∼ π (x) or π a , c , η (x) ≫ a , η π (x) according to values of η. These are complement for some results of Banks-Shparlinski [1] , of Wu [12] and of Chen-Wu [2]. [ABSTRACT FROM AUTHOR]