bluuebunny/crossref_metadata_2025 huggingface dataset:
The effect of groundwater petroleum hydrocarbons contaminants on chlorine removal in Basra city (south of Iraq): An application of mixed technology of permeable reactive barrier
Authors:   College of Engineering, University of Basrah, 61004, Basra city, Iraq, Abu-Alhail Arab Saad , Mohammed Rusul Naseer ,   College of Engineering, University of Basrah, 61004, Basra city, Iraq
Published: May 2021

Petroleum hydrocarbon contaminants in groundwater are among the most impactful environmental problems in oil production in southern Iraq, especially Basra city. Petroleum hydrocarbon contaminants affect related projects surrounding the primary pollution site. Benzene, toluene, and dimethylbenzene are the most toxic pollutants affecting the removal of perchloroethene (Cl2C=CCl2) and trichloroethene (C2HCl3) in groundwater. These pollutants have high solubility in water, leading to their transport over long distances in groundwater and difficult removal. The influence of petroleum hydrocarbons on the chlorine removal of perchloroethene and trichloroethene was studied using a polytetrafluorethylene column packed with zero-valent iron (ZVI). Batch experiments were implemented to investigate the equilibrium supply of mixtures between the aqueous and solid stages in packed column systems. It was designated using the Freundlich isotherm expression, and the result showed that R2 was greater than 0.97 for benzene, toluene, and xylene. The column study noted that the reaction constant was decreased in all columns by approximately 48 % when the pore volume was between 50 and 205, which reflects the dechlorination priority of P-CE over T-CE. These findings indicate that benzene and toluene are more effective for adsorption on the ZVI particle surfaces owing to disparate influences.
A simplified formula for determination of relative pressure in the precision forging of spur gears
Authors:   Mechanical Engineering Department, Gaziantep University, Gaziantep, 27310, Turkey., Eyercioglu Omer , F. Yılmaz Necip F. Yılmaz ,   Mechanical Engineering Department, Gaziantep University, Gaziantep, 27310, Turkey.
Published: May 2021

In this study, the relative forging pressures of spur gears were evaluated. The precision forging of spur gears was analyzed by using the upper bound method considering corner filling and bulging effect. Numerical and experimental studies were performed to investigate the effects of various parameters, such as the number of teeth, modules, facewidth, bore diameter, and friction factor on the relative forging pressure of spur gears. The results were compared with the previous studies and a simplified formula was suggested to predict the relative pressure of precision forging of spur gears. The predicted relative forging pressures obtained by the suggested formula are shown much closer to the experimental results for the complete filling of the die cavity.
Optimal location of UPFC based on sensitivity of CDF with power system’s stochasticity
Authors:   State Grid Jiangsu Electric Power CO. LTD Research Institute, Nanjing 211103, China, Zhang Ningyu , Zhao Jingbo ,   State Grid Jiangsu Electric Power CO. LTD Research Institute, Nanjing 211103, China, Zhou Qian ,   State Grid Jiangsu Electric Power CO. LTD Research Institute, Nanjing 211103, China
Published: May 2021

In this paper, a stochastic sensitivity algorithm is introduced to optimize the location of unified power flow controller (UPFC) in large scale power grid. The stochastic sensitivities are defined as the total operation cost of power system to control parameters of UPFC. Firstly, probability optimal power flow (POPF) model with power system’s randomness is established. Then point estimate method (PEM) is utilized to solve the above problem, so that the stochastic sensitivities of UPFC in all possible transmission lines could be obtained. Finally, by sorting the influence degree of UPFC at different locations to cumulative distribution function (CDF) of operation cost, the optimal location for UPFC could be selected correspondingly. To this end, IEEE-5 and IEEE-14 systems are employed to verify our proposed approach. The results show that installing UPFC by the method in this paper could significantly reduce the probability distribution of operation cost in higher region.
Innovative survey of defense machinery against Sybil attacks over wireless ad hoc network on IoT
Authors:   Asst. Professor, College of Computing and Informatics, Saudi Electronic University, Kingdom of Saudi Arabia, KSA, Singh Arun Kumar
Published: May 2021

Integrating IoT with Wireless Ad hoc Network (WANET) capabilities can solve several problems. However, because they both rely on identity nodes to communicate with each other, they are both vulnerable to Sybil attacks. Sybil attackers illegally change into several different identities (attackers) to carry out various malicious activities such as damaging data aggregation, voting, and disrupting routing. Several defense machineries have been proposed for Sybil attacks on WANET, which are mostly based on cryptography, location or position, network behavior, resource testing, and trust. However, the drawbacks are that not all machinery are suitable for use in networks with limited resources. This paper presents a survey, classification, and comparison of various defense machineries that have been proposed for non-IoT WANETs. The author emphasizes the issue of the advantages and disadvantages of this defense mechanism when applied to the IoT infrastructure and how each method can effectively recognize properties of Sybil attacks.
Influence of the new tender law on construction project bid prices and durations in Kuwait
Authors:   Department of Civil and Environmental Engineering, Kuwait University, Kuwait., Al-Sabah Ruqaya , Abdulrahim Fatema ,   Department of Civil and Environmental Engineering, Kuwait University, Kuwait.
Published: May 2021

The public construction industry is a complex industry that mandates many restrictions, consists of different prolonged phases, and involves various approvals, a great number of authorities, and party associations. The tender stage is crucial in any construction project; it sets the basis of the second party selection to a contract, which is essential for the success of the project. The State of Kuwait issued The New Tender Law (No. 49 of 2016) aligning with the rapid development of laws and regulations. The New Tender Law has introduced twenty modifications, which were included in a survey distributed to a number of participants with experience in the public construction industry in Kuwait. Ninety-three completed surveys were gathered and included in the research’s analysis. Box plot and weighted average, along with the standard deviation, were used to sort the twenty tender law modifications according to their influence on bid price and overall project duration. Encouragement of foreign investment, changing contractor classifications, lengthy award processes, and prequalification and the possibility of rebidding are common tender law modifications that have significant impacts on both attributes.
An AAC tablet application for children with language impairment
Authors:   Kuwait Institute for Scientific Research, Ghurair Noura Al , Alnaqi Ghada ,   Kuwait Institute for Scientific Research, Doush Iyad Abu ,   American University of Kuwait
Published: May 2021

People with communication impairment need an alternative communication channel to complete daily activities. Augmentative and alternative communication (AAC) systems can help provide a communication medium to support such users. The involvement of speech and language pathologists (SLPs) who work in rehabilitation centers can help develop better solutions. This paper presents the development of an AAC tablet application that uses pictures on the screen and voice feedback to help children with language impairment improve the efficiency in their communication. The proposed solution maps the sentences commonly used by children into appealing symbols. The children can use these symbols instead of constructing sentences from scratch, as done by most of the previously proposed solutions in the literature. The application was evaluated by SLPs on six children with language impairment. This research presents a design methodology when providing such a solution for touch screen devices for people with language impairment. A set of accessibility guidelines is proposed for AAC computer-based solutions, which can help researchers and practitioners. The obtained results prove that the proposed system improves the children’s stimulation to communicate and decreases communication time. Such a solution can assist therapists as a resource to improve their patients’ communication.
Development of sustainable solutions to sand encroachment on roads in Kuwait using numerical modeling
Authors:   Civil Engineering Department, Kuwait University, Kuwait, Abdullah Waleed , Alzaza Ahmad ,   Fiber and Particle Engineering, Faculty of Technology, University of Oulu, Finland, Misak Rafaat ,   Kuwait Institute for Scientific Research, Kuwait, Amjad Mohammed ,   Civil Engineering Department, Kuwait University, Kuwait
Published: May 2021

Site reconnaissance of the threat of sand encroachment in Kuwait outlined major roads that were closed or partially closed for long periods of the year. These roads are AlSubia, AlWafra–Mena Abdallah, and AlWafra-AlZoor. Site surveys of the affected roads were undertaken to investigate the types and thicknesses of accumulated sand layers that were exposed to wind erosion. Soil samples were also collected to assess the particle size distribution. Wind data over the past 35 years were analyzed, which indicated that the prevailing direction is northwest with an average speed of 6–8 m/s. A preliminary concept design based on a composite system of natural and artificial elements was developed to be a sustainable protective system, which included double porous fences and green belts as major elements. Testing of the concept design model was performed in a virtual wind tunnel with different fence porosities and afforestation systems with the aid of the Autodesk Flow numerical model. Virtual wind tunnel results revealed that adopting 50% porosity led to the optimum wind reduction (≈75%), no turbulence area, and maximum sheltered area with no sand accumulation over the fences. The final design adopted was a composite made of artificial fences, green-belt trees, and gravel-stabilized areas, accompanied by removing the street barriers, achieving the aerodynamics concept to provide a long-term sustainable solution for the sand encroachment in those areas.
Numerical evaluation of discharge coefficient and energy dissipation of flow over a stepped morning glory spillway
Authors:   Department of Civil Engineering, College of Technological Studies/ Kuwait, Alkhamis Mohammad , Sabbagh-Yazdi Saeed Reza ,   Professor of Civil Engineering Department of KNToosi University of Technology, Ranjbar-Malekshah Mohsen ,   MSc Graduate of Civil Engineering Department of KNToosi University of Technology
Published: May 2021

A morning glory spillway usually has an ogee shaped crest and conveys spill water flow to its downstream vertical shaft followed by a horizontal tunnel. The ungated morning glory spillways should convey variable discharges, which nonlinearly depends on the reservoir water elevation. The variation of discharge for unit length of the crest may cause challenges on design of downstream crest curve (which affects coefficient of discharge and downstream crest negative pressure). Furthermore, formation of a horizontal vortex flow affects the spillway discharge. In this paper, in order to resolve these problems by energy dissipation and water flow aeration, variable size steps are mapped to downstream of the curved ogee crest of morning glory spillway. A finite volume base numerical flow solver is used to investigate the effects of the considered configurations on the hydraulic design parameters. In this work, having verified the pressure and aeration of the flow over an ordinary stepped spillway, the characteristics of flow over geometry of an ordinary morning glory spillway, as well as stepped spillway, are modelled and compared to the available measurements on laboratory hydraulic models. Finally, an existing ordinary morning glory spillway is computationally modelled by considering an alternative design of variable sized steps at downstream crest (by mapping their edges to the ordinary profile of the morning glory spillway). The stepped morning glory spillway alternatives are numerically simulated for various flow rates, and the computed discharge coefficients and energy dissipations are compared with simulation results for ordinary morning glory spillway of the case.
The embedded framework for securing the Internet of Things
Authors:   Department of MCA, C. Abdul Hakeem College of Engineering and Technology, Melvisharam, India, Khan A.B Feroz , G Anandharaj ,   PG and Research Department of Computer Science, Adhiparasakthi College of Arts and Science, Kalavai, India.
Published: May 2021

The smart devices connected on the internet turn to be the internet of things, which connect other objects or devices through unique identifiers with the capability of transferring and receiving the information over the internet. There are numerous applications in different areas such as healthcare, home automation, transportation, military, agriculture, and still so many sectors that incorporate cutting-edge technologies of communication, networking, cloud computing, sensing, and actuation. With this huge increase in the number of connected devices, a strong security mechanism is required to protect the IoT devices. Hence, it is required to focus on the challenges and issues of IoT enabled applications to safeguard the entire network from the outside invasion. This paper discusses some of the challenges in building IoT applications, a detailed study of the existing security protocols, and its issues, and the potential of the IoT.
Geomorphological Analysis and Development of Ohře River Valley Meanders in the Mostecká pánev (Basin)
Authors: Balatka Břetislav , Červinka Pavel
Published: May 2021

The article gives a survey of results of geomorphological research on clinched and abandoned Ohře valley meanders and bends in the Mostecká pánev (Basin) and brings notes about their genesis. These on the Czech Republic territory exceptional forms were developing since the end of the Middle Pleistocene (Mindel 2) in appropriate lithological environment of the Terciary basin in connexion with neotectonic movements and with Mindel 2 displacement of the lower Ohře course into its present direction.
Landscape Structure Change of the Czech Rural Landscape
Authors: Lipský Zdeněk
Published: May 2021

Land use and landscape structure changes were investigated on the example of an agricultural landscape in Central Bohemia. The attention has been paid particularly to deep changes which occurred during recent 40 years of socialist collectivization. The analysis of the landscape development shows that not only the ratio of arable lands, grasslands and forests, but particularly their spatial composition significantly influence the landscape stability.
COMPREHENSIVE FILTRATION SYSTEM FOR CLOSED HYDROSYSTEMS OF AGRICULTURAL EQUIPMENT
Authors: Gunko Iryna , Stadnik Mykola , Shargorodskiy Serhiy , Rutkevych Volodymyr
Published: May 2021

The article the issue of increasing the durability and reliability of units of closed hydraulic systems of agricultural equipment by ensuring the purity of the working fluid is considered. The analysis of existing systems of filtration of working liquid for the closed hydraulic systems of the agricultural equipment is resulted. It is noted that the basis of the created and implemented filtration systems are filtration installations in pressure mains, including with automatic washing, which provide filtration fineness up to 50 μm, filter elements which have high strength, reliability and are capable of countercurrent washing at working pressure of hydraulic system.
The complex system of filtration of working liquid for the closed hydraulic systems of the agricultural equipment is offered. The filtration system of the working fluid provides for the use of filters with backwash and filtration elements with a slit-like brass wire of round cross section. The total length of the filtration gap of one filtration element with a width of 0.05 mm is 40 m
The filter provides passive cleaning technology - countercurrent flushing, as the simplest in design, easy to manufacture and sufficiently efficient and cheap.
Feature of the filtration installation is a possibility of washing of its filtration elements by a countercurrent of working liquid. The signal for flushing is the occurrence of a pressure drop on the filter, which can be used to judge the degree of contamination and the readings of manometers installed at the inlet and outlet of a closed hydraulic system of agricultural equipment.
It is noted that the developed complex filtration system for closed hydraulic systems of agricultural equipment will increase the reliability of control hydraulics at least twice and reduce costly downtime of agricultural machinery due to failure of sealed elements of hydraulic equipment.
ORGANIZATION OF OPERATION AND MAINTENANCE OF VEHICLES AND MACHINES IN UKRAINE AND ABROAD
Authors: Hrushetskiy Sergiy , Yaropud Vitaliy , Tokarchuk Oleksii
Published: May 2021

The current state of agricultural machinery in the agro-industrial complex shows that service as a direction of production activities aimed at maintaining machinery in working order has ceased to exist. Foreign and domestic experience in the operation of equipment shows that maintaining equipment in working order for consumers is an important economic task. In the current market conditions in Ukraine, technical service in the agro-industrial complex should be considered as a strategic direction to ensure the efficiency of equipment during operation from the standpoint of legal, economic, regulatory, technical, technological and personnel support, as an integral link between producer and consumer. techniques. The issues of problems in technical operation of vehicles and machines and foreign experience in organizing technical service in order to comprehensively study the basics of operational reliability of equipment, advanced technologies of technical service used in the agro-industrial complex of Ukraine and abroad. The experience of the organization of repair and maintenance in foreign countries, which is based on reducing the cost of agricultural mechanization. It is established that in modern economic conditions one of the main resources is information about the market, production technologies, various "know-how", which are the result of combining the efforts of scientists and specialists in various fields of production, etc. It is determined that for the effective implementation of scientifically sound methods of management, promotion of knowledge-intensive technologies in production, analysis of the information environment in which the enterprise operates, it is necessary to have a separate subject of market relations, which could perform such work. The set of services provided to the consumer is called a technical service. The motivating motive for improving the technical service is not to lose a potential buyer of its products, to attract a new buyer, to win a competition with a competitor, to ensure its survival and prosperity.
DEVELOPMENT OF A DEVICE FOR MILLING TILLAGE WITH SIMULTANEOUS APPLICATION OF FERTILIZERS
Authors: Sereda Leonid , Kupchuk Ihor , Kovalchuk Dmytro , Zamrii Mykhailo
Published: May 2021

In all developed countries of the world there is a search for new technological methods of tillage, aimed at protecting it from erosion, preserving and increasing fertility, reducing costs. The main means that can prevent the loss of soil fertility is the introduction of energy-saving and fertility-saving technologies. The factors of soil trauma and the maximum coverage of the soil with plant residues are laid down. The most well-known technologies are technologies that are quite common in the United States and Canada, where more than 50% of the land is cultivated, as well as in Argentina, where they account for more than 50%. In Europe, countries such as Germany, France and the United Kingdom will cultivate about 10% of the land, and in Ukraine - only about 5%.
The functionality of machines is expanding, the design is becoming more complicated, their weight is increasing. In all developed countries of the world there is a search for new technological methods of tillage, aimed at protecting it from erosion, preserving and increasing fertility, reducing costs. Various methods of minimizing tillage are widely implemented, as well as the partial replacement of dump plowing with dumpless tillage, research and practical actions aimed at finding effective, alternative, modern tillage technologies to maintain and increase the fertility of the land, which articles.
Thus, in order to preserve the soil fertility of the lands of Ukraine, theoretical studies of modern tillage technologies were conducted and the authors proposed the design features of the device for strip or continuous tillage with simultaneous application of fertilizers prior to design and design, the main results of which are presented in articles.
2. A Responsibility to Seek the Truth: Revisiting Averroes’s Decisive Treatise for Academic Freedom’s Missing Imperative
Authors: Gibbs Alexis
Published: May 2021

Abstract: This article argues that, in contemporary formulations of academic freedom, insufficient attention has been given over to the responsibility to seek the truth, as one which provides a moral precondition for the more common assertion of academic freedom as the right
to speak the truth. The article seeks to restore something of this balance by looking at Averroes’s text the Decisive Treatise (c. 1180), an apologia for philosophy in the face of the charge that it constitutes a heretical pursuit. Averroes argues that, because the law compels
“reflection upon all existing things,” reflection must include the work and ideas even of those predating the Prophet Muhammad. Indeed, Averroes goes further in suggesting that those who would prevent access to the ancients’ work are themselves barring people from reflection
upon knowledge of God. Some thoughts on the implications of Averroes’s argument for academic freedom are offered in the conclusion.
3. The Meaning of a Liberal Arts and Sciences Education in the United States: Anachronistic Lessons from a Parochial Past
Authors: Kramer Eli , Fried Robert
Published: May 2021

Abstract: Although the United States is often heralded as the leader in the liberal arts and sciences model of higher education, the idea of a “liberal education” itself remains both loaded and vague. Do we yet have a consensus on its meaning and application today
that does not rely on some appeal to a vaguely defined and putatively historic tradition? In this article, we sketch out the problem and trace its historic origins in the United States to better address one of the enduring and valuable meanings of a US liberal higher education. Our purpose
is to illuminate the essential holistic and student-centered dimension of US small liberal arts college (SLAC) education, and why it is worth preserving through the current crises and pandemic. We draw from this dimension of the US liberal education tradition several helpful suggestions about
how to escape our confusion surrounding the meaning of the idea: focusing on the character formation of individuals that can serve their communities, shifting curriculum away from mere breadth and depth in disciplinary knowledge and to breadth and depth of character development, supporting
teacher tracks in higher education to foster this kind of student-centered learning, exploring the possibilities for liberal holistic learning in other contexts and at distance, and finally being unafraid to defend a robust holistic liberal education even if it demands a lot to carry out well.
4. Toward a Theory of the Study of Higher Education
Authors: Thacker Russell , Freeman, Jr. Sydney
Published: May 2021

Abstract: From the inception of the field, scholars of higher education have routinely borrowed theory from other disciplines and fields to inform their work. Consequently, scholars have struggled to find a permanent academic home for their craft and continue to debate whether
the study of higher education should be organized as a field or a discipline. This theoretical proposal begins the establishment of a guiding theory of the study of higher education by examining the governing ideas which shape how scholars of higher education approach their research. Four
propositions are identified which together distinguish the approach of scholars of higher education from those of other traditions. We apply these propositions to one contemporary issue, leadership development, for higher education leaders to demonstrate how research into higher education
issues can be enhanced. Additional scholarship and further development of the theory is invited.
Ekonomi Kreatif melalui Masyarakat Cerdik dalam Mengelola Sampah dengan Baik
Authors: Kurniasari Chanif
Published: May 2021

Sampah telah menjadi permasalahan nasional sehingga mengelolaannya perlu dilakukan secara komprehensif dan terpadu dari hulu ke hilir agar memberikan manfaat secara ekonomi, sehat bagi masyarakat dan aman bagi lingkungan serta dapat mengubah perilaku masyarakat. Pengelolaan sampah merupakan bagian dari penanganan sampah. Efek yang diakibatkan oleh sampah terhadap lingkungan makin hari sudah semakin parah, oleh sebab itu sebagai manusia sudah sepantasnya untuk bisa mengelola sampah-sampah tersebut. Tujuan dari kegiatan kegiatan ini adalah untuk memberikan pengetahuan cara mengolah sampah dengan baik dan benar. Metode kegiatan ini melalui penyampaian penyuluhan dan pelatihan pengolahan sampah untuk di daur ulang sesuai dengan kebutuhan masyarakat sekitar dengan menggunakan leaflet dan penyampaian materi melalui power point. Sasaran kegiatan ini adalah masyarakat Dusun Tegallayang Caturharjo Pandak Bantul Yogyakarta yang berjumalah 40 orang. Hasil dari pelatihan ini masyarakat lebih memahami arti ekonomi kreatif dari mengelola sampah dengan baik dan benar.
A new record of the freshwater turtle Mauremys rivulata (Valenciennes, 1833) in the Ofkos river, Cyprus: Conservation actions required
Authors: Nicolaou Haris
Published: May 2021

A range extension of the native Balkan terrapin Mauremys rivulata is documented along the Ofkos river at the upper part of the Morfou plain, in Cyprus. Several individuals of both sexes and of different age, were caught using turtle net traps in late April 2021; different measurements were recorded, including length, width and weight. The area where the terrapins were discovered consists of deep ponds on the Ofkos riverbed, which maintain permanent and semi-permanent aquatic refugia, even during prolonged periods of drought. This is the 5th river location in Cyprus, where M. rivulata has been documented. It is assumed that this particular population has been isolated from other populations, since there is very little chance of frequent dispersal over land between the nearest existing populations of the Klimos and Pedieos rivers, respectively. Since the majority of this type of river habitat in Cyprus rapidly dries out during the long drought season, this area is of high conservation value for M. rivulata, as well as for other aquatic and wetland species. Therefore, it is of vital importance that this location falls within a proposed newly planned protected area.
Some new resuts concering strong convergence of Fejér means with respect to Vilenkin systems
Authors: Tutberidze G. , Persson L.-E. , Tephnadze G. , Wall P.
Published: May 2021

UDC 517.5
We prove some new strong convergence theorems for partial sums and Fej\'er means with respect to the Vilenkin system.
On the dynamics of the impulsive predator-prey systems with Beddington – DeAngelis type functional response
Authors: Pelen N. N.
Published: May 2021

UDC 517.9
In this study, the two-dimensional predator-prey system with Beddington–DeAngelis type functional response with impulses is considered in a periodic environment. For this special case, necessary and sufficient conditions are found for the considered system when it has at least one -periodic solution. This result is mainly based on the continuation theorem in the coincidence degree theory and to get the globally attractive -periodic solution of the given system, an inequality is given as the necessary and sufficient condition by using the analytic structure of the system.
Про асимптотику розв’язків диференціальних рівнянь другого порядку зі швидко змінними нелінійностями
Authors: Evtukhov V. M. , Chernikova A. G.
Published: May 2021

УДК 517.925
Встановлено нові результати про умови існування одного класу розв'язків двочленного неавтономного диференціального рівняння другого порядку зі швидко змінною нелінійністю, що суттєво доповнюють результати попередніх досліджень.
Нерівності типу Бернштейна – Нікольського для алгебраїчних поліномів у просторі Бергмана в областях комплексної площини
Authors: Аbdullayev F. G. , Gün C. D.
Published: May 2021

УДК 517.5 Вивчаються оцінки типу Бернштейна та Нікольського для довільного алгебраїчного полінома в областях комплексної площини.
Критерії існування систем підпросторів, що пов'язані з певним класом уніциклічних графів
Authors: Strilets O. V. , Popova N. D.
Published: May 2021

УДК 512.552.4
Досліджуються конфігурації підпросторів гільбертового простору, пов'язані з уніциклічним графом, що є циклом довжини до кожної вершини якого приєднано ланцюги довжини Вершинам графа відповідають підпростори. Якщо вершини поєднані ребром, то кут між підпросторами дорівнює деякому числу з інтервалу інакше підпросториортогональні. За допомогою теореми про редукцію уніциклічного графа доведено, що такі ненульові конфігурації існують тоді і тільки тоді, коли Отримано формули дляпідрахунку і показано, що
Picone’s identity for -Laplace operator and its applications
Authors: Luyen D. T.
Published: May 2021

UDC 517.9We prove a nonlinear analogue of Picone's identity for -Laplace operator. As an application, we give a Hardy type inequality and Sturmian comparison principle.We also show the strict monotonicity of the principle eigenvalue and degenerate elliptic system.
Density and capacity of balleans generated by filters
Authors: Brzeska A.
Published: May 2021

UDC 519.51
We consider a ballean with an infinite support and a free filter on and define for every and The ballean will be called the ballean-filter mix of and and denoted by It was introduced in [O. V. Petrenko, I. V. Protasov, Balleans and filters, Mat. Stud., 38, No. 1, 3–11 (2012)] and was used to construction of a non-metrizable Frechet group ballean. In this paper some cardinal invariants are compared. In particular, we give a partial answer to the question: if we mix an ordinal unbounded ballean with a free filter of the subsets of its support, will the mix-structure's density be equal to its capacity, as it holds in the original balleans?
Assassiner un député, un crime de lèse-nation et/ou un parricide (1789-1795) ?
Authors: Biard Michel
Published: May 2021

À partir de 1789, les incriminations de lèse-majesté et de parricide servent avant tout des effets rhétoriques, comme lors des assassinats de deux membres de la Convention en 1793, Le Peletier et Marat. Il s’agit alors de présenter tout « attentat » contre un député comme un crime contre les « pères du peuple », donc contre la souveraineté nationale. Pourtant, au fil des épurations successives de cette Assemblée, les deux incriminations se font plus discrètes, avant de resurgir au printemps 1795 avec l’assassinat d’un député (Féraud) au sein même de la Convention. Ce viol de la représentation nationale déclenche une sévère répression ainsi qu’un retour au premier plan des deux incriminations, ce dont Louis-Philippe se souviendra en 1830.
Parlementaire et saint laïque. La mort publique de Carlo Poerio (Italie, 1867)
Authors: Delpu Pierre-Marie
Published: May 2021

L’article étudie la mise en martyr du parlementaire napolitain Carlo Poerio à l’occasion de ses funérailles intervenues en 1867, alors que sa mort interrompt son mandat de député. À partir de la documentation parlementaire, de la littérature d’hommage parue en son honneur et des archives municipales de Naples et de Florence, il s’agit de retracer le processus d’édification qui a conduit à reconnaître son statut de martyr du patriotisme italien. L’orchestration de ses funérailles, les traitements faits de sa dépouille sont révélateurs des constructions sacrales qui accompagnent le culte des grands hommes. Ils posent la question de son statut de saint laïque et du sens donné à cette identification, intégrée à la pédagogie politique du nouvel État italien.
Protéger le corps des morts : les parlementaires face aux atteintes à l’intégrité du cadavre
Authors: Malivin Amandine
Published: May 2021

En 1810, le délit de « violation de sépulture » est intégré au code pénal pour répondre à l’obligation morale de respect dû à la mémoire des morts. Mais son manque de précision se heurte à la réalité et montre son incapacité à assurer la protection du corps des morts. Le délit d’atteinte à l’intégrité du cadavre n’entre dans la loi qu’en 1992. L’examen des débats parlementaires montre les difficultés à faire coïncider loi et exigence morale quand il est question du corps mort.
« Croyez-vous que cette date-là ne mérite pas d’être fêtée ? » Débats parlementaires sur la commémoration des morts de la Grande Guerre et de la victoire du 11 novembre 1918
Authors: Theodosiou Christina
Published: May 2021

En France, les bases de la politique commémorative de la Grande Guerre sont jetées durant la période charnière de 1915-1916. Les premières initiatives législatives convergent vers une individualisation de la mort, par l’inscription des noms des victimes dans l’espace public, et vers la mise en valeur du deuil de masse. S’opposant au Sénat au sortir de la guerre, la Chambre cherche à relier la commémoration des morts à la victoire. Le débat parlementaire se réoriente alors vers la commémoration de l’armistice du 11 novembre 1918 avec l’Allemagne. À partir de 1920, sous l’impulsion notamment des députés anciens combattants, les projets de loi sur le 11 novembre mettent en exergue les sacrifices consentis par tous les artisans de la victoire. Au cours des débats, deux visions de la mort sacrificielle au combat se dégagent alors.
Les miracles sont-ils des fictions ?
Authors: Pouivet Roger
Published: May 2021

Les eaux se séparent au passage de la Mer rouge par les Hébreux. L’eau est transformée en vin par Jésus lors des Noces de Cana. Pour les chrétiens, ces événements miraculeux sont réellement ou vraiment arrivés. Mais les miracles ne sont-ils pas plutôt des fictions pleines d’un sens profond ? Les chrétiens ne sont-ils pas alors invités à faire comme si les miracles avaient eu lieu ? Les miracles ne sont-ils pas des fictions ? La thèse du fictionalisme répond positivement à ces questions. Cette thèse est parfois un présupposé de l’herméneutique du récit biblique. Le fictionalisme peut être théologique, c’est-à-dire complet : Dieu lui-même est une fiction ; il peut être partiel : les miracles seuls sont des fictions, pas Dieu. L’article montre cependant qu’un chrétien ne peut adhérer au fictionalisme. Il doit assumer la réalité des miracles. Il ne peut en faire une simple affaire d’interprétation et de sens profond. Il doit croire que les eaux se sont séparés quand le peuple juif a fui l’Égypte, que Jésus a bien changé l’eau en vin à Cana.
Hume : le remède-miracle (contre les miracles)
Authors: Clavier Paul
Published: May 2021

Hume, dans l’examen de la recevabilité d’un témoignage en faveur d’un prétendu miracle, énonce un critère simple : S est crédible en relatant M dans la mesure où la probabilité que S mente ou se trompe est plus faible que la probabilité que M ne se soit pas produit. L’application de ce critère se révèle malaisée. Elle met d’ailleurs Hume en porte-à-faux avec sa notion de lois de la nature. L’expérience, jusque-là ouverte à tout ce qui n’est pas contradictoire, devient tout à coup « solide et inaltérable ». En outre, si Hume suggère deux définitions du miracle, il ne fait jouer que celle qui omet l’intervention surnaturelle ! Hume évalue la probabilité des miracles en l’absence de considérations sur les raisons que la divinité aurait ou non de produire, et à quelle fréquence. La fin de non-recevoir est ici patente.
Polymerase chain reaction-based assays facilitate the breeding and study of mouse models of Klinefelter syndrome
Authors: Zhang Hai-Xia , Zhou Yu-Lin , Xu Wen-Yan , Chen Xiao-Lu , Jiang Jia-Yang , Zhou Xiao-Man , Wang Zeng-Ge , Ke Rong-Qin , Guo Qi-Wei
Published: May 2021

Klinefelter syndrome (KS) is one of the most frequent genetic abnormalities and the leading genetic cause of nonobstructive azoospermia. The breeding and study of KS mouse models are essential to advancing our knowledge of the underlying pathological mechanism. Karyotyping and fluorescence in situ hybridization are reliable methods for identifying chromosomal contents. However, technical issues associated with these methods can decrease the efficiency of breeding KS mouse models and limit studies that require rapid identification of target mice. To overcome these limitations, we developed three polymerase chain reaction-based assays to measure specific genetic information, including presence or absence of the sex determining region of chromosome Y (Sry), copy number of amelogenin, X-linked (Amelx), and inactive X specific transcripts (Xist) levels. Through a combined analysis of the assay results, we can infer the karyotype of target mice. We confirmed the utility of our assays with the successful generation of KS mouse models. Our assays are rapid, inexpensive, high capacity, easy to perform, and only require small sample amounts. Therefore, they facilitate the breeding and study of KS mouse models and help advance our knowledge of the pathological mechanism underlying KS.
Prognostic value of PTEN in de novo diagnosed metastatic prostate cancer
Authors: Zhang Jun-Yu , Kong Yun-Yi , Wang Qi-Feng , Yang Yun-Jie , Liu Zheng , Lin Nan , Ye Ding-Wei , Dai Bo
Published: May 2021

The purpose of our study is to investigate the prognostic value of phosphatase and tensin homolog on chromosome 10 (PTEN) expression in patients with de novo metastatic castration naïve prostate cancer (mCNPC). A total of 205 patients with mCNPC at Fudan University Shanghai Cancer Center (Shanghai, China) were retrospectively examined. Immunohistochemical staining of PTEN was performed on prostate biopsy samples of these patients. Associations among clinicopathological features, patient survival and PTEN protein expression were analyzed. PTEN loss occurred in 58 of 205 (28.3%) patients. Loss of PTEN was significantly correlated with high metastatic volume (P = 0.017). No association between PTEN expression and Gleason score was observed. Patients with PTEN loss had significantly shorter progression-free survival (PFS, P < 0.001) and overall survival (OS, P < 0.001) compared with patients with intact PTEN expression. Multivariate analysis showed that elevated alkaline phosphatase, high metastatic volume and PTEN loss were independent poor prognostic factors for PFS. The Eastern Cooperative Oncology Group performance status (ECOG PS) ≥2 and PTEN loss were independent poor prognostic factors for OS. The adjusted hazard ratio of PTEN loss for PFS and OS was 1.67 (95% confidence interval [CI]: 1.14–2.43, P = 0.008) and 1.95 (95% CI: 1.23–3.10, P = 0.005), respectively. PTEN loss was also significantly associated with shorter PFS (P = 0.025) and OS (P < 0.001) in patients with low-volume metastatic disease. Our data showed that PTEN loss is an independent predictor for shorter PFS and OS in patients with de novo mCNPC.
Transradial access for anterior circulation deployment of pipeline embolization device
Authors: Werner Cassidy D. , Mathkour Mansour , Scullen Tyler A. , McCormack Erin P. , Lockwood Joseph D. , Amenta Peter S.
Published: May 2021

Common femoral artery (CFA) transfemoral access (TFA) has been the traditional route for neuroendovascular intervention with flow diversion including the pipeline embolization device (PED) for the treatment of wide-necked aneurysms. Successful deployment requires significant catheter support, thus making alternative access challenging. A 56-year-old-female presented with subarachnoid hemorrhage secondary to a large ruptured posterior communicating artery (PCOM) aneurysm as well as found to have an unruptured left superior cerebellar artery (SCA) aneurysm. Endovascular embolization of PCOM aneurysm via TFA was complicated by a right CFA pseudoaneurysm. The SCA aneurysm was treated 8 weeks later via left TFA with consequent development of a left CFA pseudoaneurysm. Contrasted magnetic resonance angiography revealed recurrence at the neck of the PCOM aneurysm at 4-month follow-up, treated via transradial access (TRA) PED flow diversion to avoid additional groin complications. Anatomic, procedural, and clinical considerations for TRA anterior circulation flow diversion using the PED are reviewed.
Effect of remote ischemic preconditioning on cerebral vasospasm, biomarkers of cerebral ischemia, and functional outcomes in aneurysmal subarachnoid hemorrhage (ERVAS)
Authors: Sangeetha R. P. , Venkatapura Ramesh J. , Kamath Sriganesh , Christopher Rita , Bhat Dhananjaya Ishwar , Arvinda H. R. , Chakrabarti Dhritiman
Published: May 2021

BACKGROUND:

Cerebral vasospasm can complicate aneurysmal subarachnoid hemorrhage (aSAH), contributing to cerebral ischemia. We explored the role of remote ischemic preconditioning (RIPC) in reducing cerebral vasospasm and ischemia and improving outcomes after aSAH.

MATERIALS AND METHODS:

Patients with ruptured cerebral aneurysm undergoing surgical clipping and meeting the trial criteria were randomized to true RIPC (n = 13) (inflating upper extremity blood pressure cuff thrice to 30 mmHg above systolic pressure for 5 min) or sham RIPC (n = 12) (inflating blood pressure cuff thrice to 30 mmHg for 5 min) after ethical approval. A blinded observer assessed outcome measures-cerebral vasospasm and biomarkers of cerebral ischemia. We also evaluated the feasibility and safety of RIPC in aSAH and Glasgow Outcome Scale-Extended (GOSE).

RESULTS:

Angiographic vasospasm was seen in 9/13 (69%) patients; 1/4 patients (25%) in true RIPC group, and 8/9 patients (89%) in sham RIPC group (P = 0.05). Vasospasm on transcranial Doppler study was diagnosed in 5/25 (20%) patients and 1/13 patients (7.7%) in true RIPC and 4/12 patients (33.3%) in sham RIPC group, (P = 0.16). There was no difference in S100B and neuron-specific enolase (NSE) levels over various time-points within groups (P = 0.32 and 0.49 for S100B, P = 0.66 and 0.17 for NSE in true and sham groups, respectively) and between groups (P = 0.56 for S100B and P = 0.31 for NSE). Higher GOSE scores were observed with true RIPC (P = 0.009) unlike sham RIPC (P = 0.847) over 6-month follow-up with significant between group difference (P = 0.003). No side effects were seen with RIPC.

CONCLUSIONS:

RIPC is feasible and safe in patients with aSAH and results in a lower incidence of vasospasm and better functional outcome.
Wasp sting – Causing a fatal menace
Authors: Karri Madhavi , Ramasamy Balakrishnan , Perumal Santhosh , Kannan Karthik Thamarai
Published: May 2021

Wasp stings are seen routinely in emergency setup, especially in developing countries. They result in varied manifestations, including both local and systemic reactions. Neurological complications, like stroke, are infrequent in the presentation. A 40-year-old healthy male presented with two episodes of generalized tonic-clonic seizures with left dense hemiplegia after 6 h of massive wasp stings. Local manifestations of urticaria, redness, and itching were present over the face, neck, and upper limbs. Magnetic resonance imaging showed massive infarct in the anterior and middle cerebral artery regions with right internal carotid artery thrombosis. An echocardiogram showed severe left ventricular dysfunction with no evidence of clot, and the carotid duplex study was normal. Systemic manifestations such as anaphylactic shock, stroke, and myocarditis are rare, fatal, and life-threatening. We must be aware of these most unusual and possible complications following a hymenopteran sting.
The 100 most cited articles in the endovascular treatment of brain arteriovenous malformations
Authors: Yang Runlin , Ren Yifan , Maingard Julian , Thijs Vincent , Le Dustin Viet Anh , Kok Hong Kuan , Lee Michael J , Hirsch Joshua A , Chandra Ronil V , Brooks Duncan Mark , Asadi Hamed
Published: May 2021

BACKGROUND:

The literature base for endovascular treatment of brain arteriovenous malformations (BAVMs) has grown exponentially in recent decades. Bibliometric analysis has been used to identify impactful articles in other medical specialties. The aim of this citation analysis was to identify and characterize the top 100 most cited articles in the field of endovascular BAVM treatment.

METHODS:

The top-cited papers were identified by searching selected keywords (“endovascular treatment,” “interventional treatment,” “brain arteriovenous malformation,” “emboliz(s)ation”) on the Web of Science platform. The top 100 articles were ranked according to their number of citations. Each article was further evaluated to obtain predefined characteristics including citation(s) per year, year of publication, authorship, journal-title and impact factor, article topics, article type, and level of evidence.

RESULTS:

The top 100 most cited articles for endovascular BAVM treatment were published between 1960 and 2014. The total number of citations for these articles ranged from 56 to 471 (median 85.5). Most articles (76%) were published between 1990 and 2009 in three journals (56%), originated in the USA (52%) followed by France (16%). The most common topic related to embolization agents and the majority of articles constituted level IV or V evidence.

CONCLUSIONS:

This study provides a comprehensive overview of the most cited articles in the field of endovascular BAVM treatment. Our analysis recognizes key contributions from authors and institutions in the field and leads to a better understanding of the evidentiary framework for BAVM treatment.