bluuebunny/crossref_metadata_2025 huggingface dataset:
HUBUNGAN PEMAHAMAN KONSEP ARITMATIKA SOSIAL DENGAN HASIL BELAJAR IPS MATERI PPH
Authors: Rahmawati Nurina Kurniasari , Kusuma Arie Purwa
Published: May 2020

Matematika tidak terlepas dari konsep-konsep yang bersifat abstrak, penguasaan konsep-konsep matematika merupakan prasyarat untuk dapat memahami dan mengembangkan cabang ilmu-ilmu yang lain. Matematika juga memiliki hubungan antara ilmu satu dengan yang lain sehingga dalam setiap memperkenalkan konsep yang baru diperlukan konsep selanjutnya yang lebih tinggi. Sebagai ilmu yang universal, matematika tidak dapat terpisahkan dari berbagai disiplin ilmu lain. Salah satu ilmu atau matapelajaran yang memiliki keterkaitan dengan matematika adalah Ilmu Pengetahuan Sosial (IPS). Penelitian ini bertujuan untuk mengetahui apakah terdapat korelasi positif antara pemahaman konsep aritmatika sosial dengan hasil belajar IPS pada materi PPH. Metode yang digunakan dalam penelitian ini adalah metode deskriptif kuantitatif dengan teknik survey melalui pendekatan korelasi. Populasi yang digunanakan dalam penelitian ini adalah siswa kelas VIII yang berjumlah 30 siswa. Teknik pengumpulan data yang digunakan adalah dengan tes berbentuk pilihan ganda sebanyak 30 butir soal. Teknik analisis data yang digunakan untuk menguji hipotesis adalah teknik korelasi product moment. Hasil penelitian ini menunjukkan bahwa terdapat hubungan yang signifikan antara pemahaman konsep matematika materi aritmatika sosial dengan hasil belajar IPS materi PPH, dimana rhitung  sebesar 0.90 sedangkan r table dengan n = 30 adalah 0.361 dengan taraf signifikan 0,05.
PENERAPAN HASIL BELAJAR MATEMATIKA MENGGUNAKAN METODE DRILL DAN RESITASI PADA MATERI BANGUN DATAR SEGITIGA
Authors: Nawi Abdul Rahman , Rahmawati Nurina Kurniasari , Iswadi Iswadi
Published: May 2020

Penelitian ini diharapkan dapat membuktikan perbedaan hasil belajar matematika khususnya dalam materi Bangun Datar Segitiga, antara siswa yang diajar dengan menggunakan MetodeDrill dibandingkan dengan siswa yang diajar dengan menggunakan Metode Resitasi. Penelitian ini dilaksanakan selama tigabulan tepatnya yaitu bulan April sampai dengan bulan juni 2018, dengan jumlah sampel sebanyak 60 orang siswa, tepatnya 30 orang siswa kelas VII-1 yang diberi pembelajaran dengan menggunakan metode Drill, dan 30 orang siswa kelas VII-2 yang diberi pembelajaran dengan menggunakan metode Resitasi, pemilihan sampel penelitian dilakukan secara cluster random sampling. Berdasarkan perhitungan diperoleh data bahwa rata-rata hasil belajar siswa melalui metode Drill memiliki rata-rata 74,67, simpangan baku 7,16, median 72,63, serta modus 72,83. Selanjutnya hasil belajar siswa yang diajar melalui metode Resitasi memiliki rata-rata 66,17, simpangan baku 7,15, median 65,88 serta modus 64,5. Berdasarkan uji hipotesis diperoleh nilai thitung= 4,64 > ttabel = 2,002. Maka diperoleh kesimpulan bahwa H1 diterima dan H0 ditolak. Kesimpulan penelitian ini adalah terdapat perbedaan yang signifikan antara hasil belajar matematika siswa yang diajar menggunakan metode Drill dengan hasil belajar matematika yang menggunakan metode Resitasi pada materi Bangun Datar Segitiga di Kelas VII SMP Fatachilah Grogol, Jakarta Barat.
TINGKAT PENGUASAAN SISWA KELAS X SMA ISLAM PARLAUNGAN SIDOARJO DALAM MENYELESAIKAN SOAL CERITA BERBASIS GAYA BELAJAR
Authors: Ardianik Ardianik , Martono Boedi , Setiawan Windi
Published: May 2020

Penelitian ini bertujuan untuk mendeskripsikan  sejauh mana tingkat penguasaan siswa kelas X SMA Islam Parlaungan berbasis gaya belajar  visual, auditori, dan kinestetik dalam menyelesaikan soal cerita sistem persamaan linear tiga variabel. Penelitian ini termasuk jenis penelitian deskriptif dengan pendekatan kualitatif. Subjek dalam penelitian ini adalah  siswa kelas X SMA Islam Parlaungan  Sidoarjo yang berjumlah 49 siswa, yang berbasis gaya belajar visual ada 21 siswa, gaya belajar auditori ada 16 siswa, dan gaya belajar kinestetik ada 12 siswa.Metode pengumpulan data yang digunakan dengan memberikan angket gaya belajar dan metode tes. Metode analisis data yang digunakan  yaitu  analisis data hasil tes dengan mengklasifikasikan tingkat penguasaan siswa berdasarkan nilai kriteria kelulusan minimal (KKM) mata pelajaran matematika  yaitu 75 dan mengklasifikasikan tingkat penguasaan siswa berdasarkan nilai mean dan standar deviasi. Hasil penelitian menyimpulkan bahwa: (1) Tingkat penguasaan materi berdasarkan nilai KKM, menunjukkan bahwa tingkat penguasaan siswa visual pada materi soal cerita sistem persamaan linear tiga variabel ada 8,2% yang menguasai dan ada 34,7% yang tidak menguasai. Tingkat penguasaan materi siswa auditori ada 6,1 % yang menguasai dan ada 26,5% yang tidak menguasai. Tingkat penguasaan materi siswa kinestetik tidak ada  0%  yang menguasai dan ada 24.5% yang tidak menguasai; (2) Tingkat penguasaan materi  berdasarkan nilai mean dan standart deviasi, menunjukkan bahwa tingkat penguasaan siswa visual pada materi soal cerita sistem persamaan linear tiga variabel tergolong klasifikasi tinggi ada 8,2%, tergolong klasifikasi sedang ada 28,6%, dan tergolong klasifikasi rendah ada 6,1%. Tingkat penguasaan materi siswa auditori yang tergolong klasifikasi tinggi ada 6,1%, tergolong klasifikasi sedang ada 26,5%, dan tidak ada 0% yang tergolong klasifikasi rendah. Tingkat penguasaan materi siswa kinestetik tergolong klasifikasi tinggi tidak ada (0%), tergolong klasifikasi sedang ada 14,3%, dan yang tergolong klasifikasi rendah  ada 10,2%.
PENGARUH MEDIA MAPLE TERHADAP KOMUNIKASI MATEMATIKA PADA MATERI INTEGRAL
Authors: Andriani Desi Gita , Indrayany Eka Sri
Published: May 2020

Pada pembelajaran matematika kemampuan komunikasi matematika sangat diperlukan, karena untuk mengemukakan idea - idea matematis secara benar, namun komunikasi matematika di SMA Pawyatan Daha Kediri kurang terasah. Tujuan penelitian ini adalah untuk mengetahui pengaruh media maple terhadap komunikasi matematika siswa pada materi integral. Penelitian ini merupakan penelitian eksperimental dengan desain nonequivalent control grop desain Populasi penelitian ini adalah siswa kelas XI SMA Pawyatan Daha Kediri. Pengambilan sampel penelitian ini menggunkan teknik pengambilan sampel dalam penelitian ini menggunakan cluster random sampling.  Metode pengunpulan data yang digunakan adalah metode tes, yang digunakan untuk mengetahui komunikasi matematika siswa. Teknik analisis data yang digunakan adalah Idependent Sample t Test. Hasil penelitian ini menunjukkan bahwa ada pengaruh media maple terhadap komunikasi matematika siswa pada materi integral, dengan thitung = 6,039> ttabel, 5%;66 = 2,010.
The Economics and Politics of Social Democracy: A Reconsideration
Authors: Storm Servaas
Published: May 2020

Questions about the decline of Social democracy continue to excite wide interest, even in the era of Covid-19. This paper takes a fresh look at topic. It argues that social democratic politics faces a fundamental dilemma: short-term practical relevance requires it to accept, at least partly, the very socio-economic conditions which it purports to change in the longer run. Bhaduri’s (1993) essay which analyzes social democracy’s attempts to navigate this dilemma by means of ‘a nationalization of consumption’ and Keynesian demand management, was written before the rise of New (‘Third Way’) Labor and before the Great Financial Crisis of 2007-8. This paper provides an update, arguing that New Labor’s attempt to rescue ‘welfare capitalism’ entailed a new solution to the dilemma facing social democracy based on an expansion of employment, i.e. an all-out emphasis on “jobs, jobs, jobs”. The flip-side (or social cost) of the emphasis on job growth has been a stagnation of productivity growth—which, in turn, has put the ‘welfare state’ under increasing pressure of fiscal austerity. The popular discontent and rise of ‘populist’ political parties is closely related to the failure of New Labor to navigate social democracy’s dilemma.
performance of the Mocean M100 wave energy converter described through numerical and physical modelling
Authors: McNatt J. Cameron , Retzler Christopher H.
Published: May 2020

Mocean Energy has designed a 100-kW hinged-raft wave energy converter (WEC), the M100, which has a novel geometry that reduces the cost of energy by improving the ratios of power per size and power per torque. The performance of the M100 is shown through the outputs of frequency-domain and time-domain numerical models, which are compared with those from 1/20th scale wave-tank testing. Results show that for the undamped, frequency-domain model, there are resonant peaks in the response at 6.6 and 9.6 s, corresponding to wavelengths that are 1.9 and 3.7 times longer than the machine. With the inclusion of power-take-off and viscous damping, the power response as a function of frequency shows a broad bandwidth and a hinge flex amplitude of 12-20 degrees per meter of wave amplitude. Comparison between the time-domain model and physical data in a variety of sea states, up to a significant wave height of 4.5 m, show agreements within 10% for average power absorption, which is notable because only simple, nonlinear, numerical models were used. The M100 geometry results in a broad-banded, large amplitude response due to its asymmetric shape, which induces coupling between modes of motion.
novel wave-energy device with enhanced wave amplification and induction actuator
Authors: Bokhove Onno , Kalogirou Anna , Henry David , Thomas Gareth P.
Published: May 2020

A novel wave-energy device is presented. Both a preliminary proof-of-principle of a working, scaled laboratory version of the energy device is shown as well as the derivation and analysis of a comprehensive mathematical and numerical model of the new device. The wave-energy device includes a convergence in which the waves are amplified, a constrained wave buoy with a (curved) mast and direct energy conversion of the buoy motion into electrical power via an electro-magnetic generator. The device is designed for use in breakwaters and it is possible to be taken out of action during severe weather. The new design is a deconstruction of elements of existing wave-energy devices, such as the TapChan, IP wave-buoy and the Berkeley Wedge, put together in a different manner to enhance energy conversion and, hence, efficiency. The idea of wave-focusing in a contraction emerged from our work on creating and simulating rogue waves in crossing seas, including a "bore-soliton-splash". Such crossing seas have been recreated and modelled in the laboratory and in simulations by using a geometric channel convergence. The mathematical and numerical modelling is also novel. One monolithic variational principle governs the dynamics including the combined (potential-flow) hydrodynamics, the buoy motion and the power generation, to which the dissipative elements such as the electrical resistance of the circuits, coils and loads have been added a posteriori. The numerical model is a direct and consistent discretisation of this comprehensive variational principle. Preliminary numerical calculations are shown for the case of linearised dynamics; optimisation of efficiency is a target of future work.
FRENECTOMY: A CASE REPORT
Authors: Dr. Shakir Hussain Rather  , Dr. Neeraj Kant Panwar  , Dr. N. Nisanth
Published: May 2020

High frenum attachment is a very common problem in the population and causes various problems in
function and aesthetics. It is managed by procedures such as frenotomy and frenectomy. Aberrant frenum can be removed by any of the modification techniques that have been proposed, a functional and an aesthetic outcome can be achieved by a proper technique selection, based on the type of the frenal attachment.
KEYWORDS: Labial frenectomy, midline diastema.
ENTREPRENEURSHIP EDUCATION AND MANAGERIAL COMPETENCE AMONG SMES IN ANAMBRA STATE, NIGERIA
Authors: Ndubuisi-Okolo Purity.U  , Attah Emmanuel Yusuf  , Chime .U.F
Published: May 2020

Business activities among traders in Anambra State seem to be changing from what it was formerly known for especially the Small Scale businesses. This is because of globalization, inadequate financial resources, poor business connections, paucity of experience, inability to cope with competition, poor sales and high stock of inventory, high operating costs as a result of poor infrastructure, inefficient management, poor business education. This study set out to ascertain the extent to which entrepreneurship education affects managerial competence among traders in Anambra State; to ascertain the effect of participating in business workshop on performance of SMES in Anambra State; and to determine the effect of acquired technical know-how on the turnover of SMES in Anambra State. Research questions and hypotheses were set in line with the objectives of the study. The study adopted a survey research design and a sample size of 196 respondents were drawn from a total population of 386 SMEs of the two selected cities in Anambra State. Although 180 copies of the questionnaire were correctly filled, returned and used for the analysis. Descriptive statistics was used for the analysis. Findings showed that there is a significant positive relationship between performance of SMES and entrepreneurship education as indicated by r- value of = 0.79 at 0.05 level of significance. Also, acquired technical know-how has improved traders’ business turnover showing a value of r = 0.75 at 0.05 level of significance. The study concluded that entrepreneurship education is the major ingredient that traders in Anambra State need in order to improve their business, technical know-how, mindset, turnover and other aspects of their businesses to achieve maximum profit. The study recommended that government of Anambra State need to create a conducive entrepreneurship centers within the business eco-systems to enable SMEs operators attend workshops when slated. Government agencies in charge of Trade and Commerce in Anambra State need to guide and assist traders by offering them financial aid, infrastructure as required and less taxation.
On the subject of influence of dissipative and permanent momentums on stability of uniform rotations of two elastically connected free gyroscopes of Lagrange
Authors: Kononov Yuri , Sviatenko Yaroslav
Published: May 2020

In many works, there are studies of the asymptotic stability of rotation of a free Lagrange gyroscope in a resisting medium. This article generalizes this problem to the case of uniform rotations of two free Lagrange gyroscopes connected by an elastic restoring spherical hinge. The rotation of each gyroscope is maintained by a constant moment in an inertial coordinate system. The characteristic equation of the perturbed motion is presented in the form of an algebraic equation of the fourth degree with complex coefficients. Based on the innor approach, conditions of asymptotic stability are obtained in the form of a system of three inequalities. The left-hand side of these inequalities is represented, respectively, in the form of determinants of the third, fifth, and seventh orders. Up to first-order values of smallness, relative to the reciprocal of the stiffness coefficient, a study is made of the effect of the joint stiffness on stability conditions. From the conditions of positivity of the highest coefficients in three inequalities, it is shown that for a sufficiently large rigidity, the stability conditions are determined by only one inequality. Cases of degeneration of an elastic spherical joint into a spherical inelastic, cylindrical, and universal elastic joint (Hooke's joint) are considered. In the case of an inelastic spherical joint, the system of three inequalities is slightly simplified. The greatest simplification arises in the case of a cylindrical hinge. In this case, the characteristic equation is represented as a quadratic equation with complex coefficients. According to the innoric approach, the conditions of asymptotic stability are written in the form of a single inequality, the left side of which is presented in the form of third-order determinants. It is shown that this inequality coincides with the inequality obtained earlier for the case of a sufficiently large rigidity of the hinge. If the angular velocities of the proper rotations of the gyroscopes coincide, the inequality obtained for the cylindrical hinge coincides with the well-known inequality for one gyroscope. In the case of a universal elastic hinge (Hooke's hinge), the first inequality is represented as a square inequality with respect to the angular velocity of proper rotation.
Collectives of automata on infinite grid graph with deterministic vertex labeling
Authors: Sapunov Seregy
Published: May 2020

Automata walking on graphs are a mathematical formalization of autonomous mobile agents with limited memory operating in discrete environments. Under this model broad area of studies of the behaviour of automata in finite and infinite labyrinths (a labyrinth is an embedded directed graph of special form) arose and intensively developing. Research in this regard received a wide range of applications, for example, in the problems of image analysis and navigation of mobile robots. Automata operating in labyrinths can distinguish directions, that is, they have a compass. This paper examines vertex labellings of infinite square grid graph thanks to these labellings a finite automaton without a compass can walk along graph in any arbitrary direction. The automaton looking over neighbourhood of the current vertex and may move to some neighbouring vertex selected by its label. We propose a minimal deterministic traversable vertex labelling that satisfies the required property. A labelling is said to be deterministic if all vertices in closed neighbourhood of every vertex have different labels. It is shown that minimal deterministic traversable vertex labelling of square grid graph uses labels of five different types. Minimal deterministic traversable labelling of subgraphs of infinite square grid graph whose degrees are less than four are developed. The key problem for automata and labyrinths is the problem of constructing a finite automaton that traverse a given class of labyrinths. We say that automaton traverse infinite graph if it visits any randomly selected vertex of this graph in a finite time. It is proved that a collective of one automaton and three pebbles can traverse infinite square grid graph with deterministic labelling and any collective with fewer pebbles cannot. We consider pebbles as automata of the simplest form, whose positions are completely determined by the remaining automata of the collective. The results regarding to exploration of an infinite deterministic square grid graph coincide with the results of A.V. Andzhan (Andzans) regarding to traversal of an infinite mosaic labyrinth without holes. It follows from above that infinite grid graph after constructing a minimal traversable deterministic labelling on it and fixing two pairs of opposite directions on it becomes an analogue of an infinite mosaic labyrinth without holes.
Analisis Tarif Dan Besarnya Pajak Bahan Bakar Kendaraan Bermotor Di Indonesia
Authors: Lim Setiadi Alim , Indrawati Lilik
Published: May 2020

Fossil-fueled motor vehicles play an important role in supporting the economicactivities of society. Besides having a positive effect on a country's economicgrowth, the operation of fossil-fueled motor vehicles also has a negative impact.These negative effects impose costs on society which are usually known asexternal costs and consist of air pollution costs, congestion costs, accident costs, noise costs and climate change costs. Conceptually, the external costs ofoperating these fossil fuel vehicles must be charged to motor vehicle usersthrough the imposition of various taxes, one of which can be in the form of MotorVehicle Fuel Tax. In Indonesia the Motor Vehicle Fuel Tax is levied as a RegionalTax at a rate of 5% of the Selling Value of Motor Vehicle Fuel and is notdifferentiated for petrol or diesel fuels. Research conducted shows that the MotorVehicle Fuel Tax that is collected in Indonesia is still too small, both from itsabsolute value and its tariffs, when compared with European countries, OECDand non OECD member countries and countries in the Southeast Asia Region. Inaddition, the value of the Motor Vehicle Fuel Tax collected is still insufficient to cover the external costs of operating a fossil-fueled motorized vehicle. Therefore,the tax rates for motor vehicle fuels in Indonesia must be increased and the ratesmust be separated between gasoline fuel which must be higher than diesel fuel.
Analisis Minat Beli Toko Kelontong Di Kecamatan Wonokromo, Surabaya Dengan Pendekatan Store Atmosphere
Authors: Yoseph Y. F Deograsias
Published: May 2020

The grocery store industry is still facing a form of economic business that hasgood prospects, even in a crisis. However, in the same period many took thegrocery that went bankrupt, because they were no longer able to maintain sales.There needs to be a fundamental change in the grocery store in order, but thegrocery store is starting to rise from behind. As Indonesian people, are we ready to help by diverting shopping at grocery stores. By agreeing to Store Atmosphere,it is expected that willingness to buy from grocery stores will increase.
Total Phenolic and Flavonoid Content of Elaeis guineensis Leaves Treated with Different Amount of Nitrogen-Potassium Fertilizer
Authors: HASAN Hazrina , ABD MANAN Fazilah
Published: May 2020

The amount of fertilizer used as source of nutrients play an important role for successful growth of oil palm. In this study, the effect of different amount of nitrogen (N) and potassium (K) fertilizer on the biochemical properties of oil palm were studied. The fertilizer consist of constant amount of Bayovar rock phosphate (BRP), Kieserite (KS), and Foliar Boron (F’Bor), as well as different levels of muriate of potash (MOP) and ammonium sulphate (AS). The treatments were labeled as T1, T2 and T3. Six planting materials indicated as A, B, C, D, E and F were tested. The total phenolic content (TPC) and total flavonoid content (TFC) in the leaves of the oil palm trees were analyzed using folin-ciocalteu method and aluminium chloride method, respectively. Results showed that the leaves of planting material A and F showed significant responses towards fertilizer levels where the TPC ad TFC contents reduced at the highest fertilizer level. Planting material C and D responded quite similar in terms of TPC content with planting material A and F, respectively. Overall, different planting materials showed different pattern of responses specifically for TPC and TFC towards fertilizer level.
A Theological Analysis of Issues Arising from the Christian Asante Chief’s Relationship with the Black Stool (Akonwa Tuntum)
Authors: Ofori Samuel
Published: May 2020

One of several issues of contention that have created a gulf between Christianity and the traditional Asante chieftaincy institution is the chief’s relationship with the black stool. The general perception of Christians is that the black stool is an object of worship, it is demonic and should be avoided by Christian chiefs. This paper theologically analyzes the issues of contention in the Christian chief’s relationship with the black stool and presents a Christian response to guide them. This is an empirical qualitative study, and it uses a phenomenological approach to understand the phenomena related to the issues of contention in the Christianity-chieftaincy encounter. The method of obtaining information included interviews of fifty (50) Christian Asante chiefs, a representative group obtained by the purposeful sampling method. Information was also obtained through personal observation of some of the traditional religious rituals they perform. The issues of contention were then examined in the light of scripture in order to help bridge the seeming gulf between Asante chieftaincy and Christianity. This research has established the fact that the black stool is not a demonic object. In fact, the issues of contention in the Christianity and chieftaincy encounter, relating to the black stool, have arisen not only from a lack of understanding and proper appreciation of the traditional rituals, but also from lack of proper understanding and poor interpretation of scriptural texts used in relating the gospel to the chieftaincy institution.
A Free-floating or Wide-orbit Planet in the Microlensing Event OGLE-2019-BLG-0551
Authors: Mróz Przemek , Poleski Radosław , Han Cheongho , Udalski Andrzej , Gould Andrew , Szymański Michał K. , Soszyński Igor , Pietrukowicz Paweł , Kozłowski Szymon , Skowron Jan , Ulaczyk Krzysztof , Gromadzki Mariusz , Rybicki Krzysztof , Iwanek Patryk , Wrona Marcin ,   (OGLE Collaboration), Albrow Michael D. , Chung Sun-Ju , Hwang Kyu-Ha , Ryu Yoon-Hyun , Jung Youn Kil , Shin In-Gu , Shvartzvald Yossi , Yee Jennifer C. , Zang Weicheng , Cha Sang-Mok , Kim Dong-Jin , Kim Hyoun-Woo , Kim Seung-Lee , Lee Chung-Uk , Lee Dong-Joo , Lee Yongseok , Park Byeong-Gon , Pogge Richard W. ,   (KMT Collaboration)
Published: May 2020

High-cadence observations of the Galactic bulge by the microlensing surveys led to the discovery of a handful of extremely short-timescale microlensing events that can be attributed to free-floating or wide-orbit planets. Here, we report the discovery of another strong free-floating planet candidate, which was found from the analysis of the gravitational microlensing event OGLE-2019-BLG-0551. The light curve of the event is characterized by a very short duration (≲3 days) and a very small amplitude (≲0.1 mag). From modeling of the light curve, we find that the Einstein timescale,

day, is much shorter, and the angular Einstein radius,

μas, is much smaller than those of typical lensing events produced by stellar-mass lenses (

days,

mas), indicating that the lens is very likely to be a planetary-mass object. We conduct an extensive search for possible signatures of a companion star in the light curve of the event, finding no significant evidence for the putative host star. For the first time, we also demonstrate that the angular Einstein radius of the lens does not depend on blending in the low-magnification events with strong finite source effects.
Del Adriático al Atlántico: Venecia y Cádiz entre navegación, diplomacia y comercio (siglos XIV-XV)
Authors: González Arévalo Raúl
Published: May 2020

Entre las comunidades italianas en la Andalucía medieval, la veneciana es la menos conocida. El presente artículo se propone abordar su presencia en el Golfo de Cádiz desde una perspectiva global e integradora, tratando el territorio como una unidad histórica, tomando en consideración fuentes ita­lianas e ibéricas de diferente naturaleza: públicas y privadas, económicas, institucionales y narrativas. Para ello se abordará la estrategia institucional de la República, articulada mediante la diplomacia y la acción consular; posteriormente, la navegación institucional de las galeras mercantiles; a continuación, la navegación privada, prácticamente desconocida en esas aguas; por último, las informaciones sobre el comercio recogidas en regis­tros privados y manuales de mercancías específicamente venecianos. El resultado es una imagen mucho más rica, variada y compleja de lo que per­mitía vislumbrar el paso anual de los convoyes mercantiles, que invita a repensar la posición y el papel de Castilla para Venecia en Europa occiden­tal, y la de los venecianos en el panorama mercantil andaluz.
Los asentistas de galeras genoveses y la articulación naval de un imperio policéntrico (siglos XVI-XVII)
Authors: Maréchaux Benoît
Published: May 2020

Este artículo analiza la función que la escuadra de los asentistas de galeras genoveses desempeñó en la articulación de varios componentes territoria­les del imperio hispánico entre la segunda mitad del siglo XVI y la primera mitad del siglo XVII. Mientras los estudios sobre la flota mediterránea de la Monarquía se han focalizado generalmente en el ejercicio de la guerra naval, este artículo muestra que, más allá de esta actividad, la escuadra de los genoveses fue clave para el transporte de soldados, metales preciosos, élites de gobierno e información entre la Península Ibérica y el norte de Ita­lia. Este papel fue particularmente relevante durante la guerra de los Ochenta Años (1568-1648), cuando la situación en el Atlántico obligó a la Corona a utilizar el Mediterráneo como plataforma logística para la movi­lización de recursos hacia el norte de Europa. A través del análisis de la aportación de la escuadra hispano-genovesa a esta tarea de articulación naval, este trabajo pretende contribuir a un mayor entendimiento de las ins­tituciones de tipo transnacional que fomentaban la conexión y la circula­ción entre los diferentes componentes de un imperio policéntrico.
Monarquía absoluta y desamortización municipal: los traspasos a censo perpetuo de Fernando VII
Authors: Linares Luján Antonio Miguel
Published: May 2020

La presente investigación pretende acabar con la idea de que la vuelta al trono de Fernando VII a partir de 1814 supuso la parálisis total de la política de desamortización municipal desarrollada en España por las Cortes de Cádiz. Las fuentes utilizadas para cumplir con esta pretensión proceden de las indagaciones que llevó a cabo la Dirección General de Propios y Arbitrios del Reino entre 1824 y 1833 para legitimar las ventas espontáneas producidas durante la Guerra de la Independencia. Estas averiguaciones, contrastadas con la escasa bibliografía existente para la monarquía fernandina, permiten detectar la presencia de una institu­ción abiertamente partidaria de la privatización integral de la riqueza concejil y comunal en las entrañas mismas de la administración absolu­tista, así como la realización de decenas de transferencias en enfiteusis, autorizadas por la Corona y repartidas por toda la nación. La conclu­sión más relevante al respecto es que el doble reinado del último monarca absoluto (1814-1820 y 1823-1833) no solo no dejó en suspenso el proceso enajenador, reavivado al calor del conflicto napoleónico, sino que, hasta cierto punto, contribuyó a legitimarlo e, incluso, a diver­sificarlo con nuevos modelos de traspaso.
La Camarería Mayor en la corte de Fernando VII: Un espacio nobiliario de poder informal y capital simbólico
Authors: Moral Roncal Antonio Manuel
Published: May 2020

El objetivo de este artículo es valorar si una de las secciones de la Real Casa fue un espacio de poder informal y acumulación de capital simbó­lico para las mujeres de la nobleza española en el reinado de Fernando VII. Se trata de un periodo intermedio entre la sociedad cortesana del siglo XVIII y las transformaciones que el liberalismo provocó en la misma, a partir de 1833. El autor pretende comenzar a rellenar ese vacío, necesa­rio para comprender la evolución del entorno femenino de la corte, basán­dose en la documentación existente en el Archivo General del Palacio Real de Madrid. Resulta también sustancial conocer el papel que el monarca atribuyó al personal femenino. Analizando la composición, reglamentos y personal de la Camarería Mayor podemos concluir que, en todo caso, ese espacio muestra a las mujeres nobles alejadas de una con­cepción cultural pasiva y estática.
«El hambre le impulsara»: La crisis de subsistencias y el auge de delitos contra la propiedad en Galicia durante la década de 1850
Authors: Carballo Gende Enrique
Published: May 2020

En la década de 1850 los tribunales gallegos se encontraron con un impor­tante incremento de los delitos contra la propiedad, tanto en términos absolutos como relativos, que coincide con la crisis de subsistencias y el aumento del precio de los alimentos. Aumentaron los robos y hurtos come­tidos por individuos asentados dentro de su comunidad y sin anteceden­tes, en especial provenientes del proletariado rural. Delinquieron para subsistir en un contexto en el que los riesgos asociados a este tipo de cri­men eran altos y el sistema judicial no se mostraba tolerante con el delito de supervivencia. La persecución no partió mayoritariamente de los cuer­pos policiales. Los primeros pasos para llevarlos a los tribunales los die­ron los ciudadanos: las víctimas, vecinos, y, en alguna ocasión, familiares de los delincuentes. Sobre todo en el campo, recurrieron principalmente a las élites locales ligadas a la administración municipal para la denun­cia. El castigo hacia los delincuentes pasó, tanto o más que por las con­denas de cárcel, por los gastos asociados al juicio, tan onerosos que arruinaban a los acusados totalmente aunque no fuesen condenados.
La Unión de Rabassaires y las respuestas de los viticultores catalanes frente a la crisis vinícola de comienzos del siglo XX
Authors: Planas Jordi
Published: May 2020

Durante el primer tercio del siglo XX, el sector vitícola se vió sumido en una grave crisis, como resultado de una sobreproducción estructural a escala internacional. Este artículo centra su atención en las vías de acción colectiva de los viticultores catalanes como respuesta a la crisis y, en especial, en la Unión de Rabassaires que, desde su creación en 1922, fue la principal organización sindical agraria de Cataluña y una de las más importantes de España. Se analizan las relaciones entre la Unión de Rabassaires y la Unión de Viticultores de Cataluña, una organización que pretendía agrupar al conjunto de los viticultores, destacando sus coinci­dencias y divergencias en su lucha contra la crisis vinícola. También se analizan las relaciones de la Unión de Rabassaires con el cooperativismo vitivinícola, que en Cataluña se hallaba en expansión a comienzos de los años veinte, y se explican las razones de su desarrollo muy independiente del sindicalismo rabassaire.
Arabic Sign Language Recognition through Deep Neural Networks Fine-Tuning
Authors: Saleh Yaser , Issa Ghassan Farid
Published: May 2020

Sign Language is considered the main communication tool for deaf or hearing impaired people.  It is a visual language that uses hands and other parts of the body to provide people who are in need to full access of communication with the world.  Accordingly, the automation of sign language recognition has become one of the important applications in the areas of Artificial Intelligence and Machine learning.  Specifically speaking, Arabic sign language recognition has been studied and applied using various intelligent and traditional approaches, but with few attempts to improve the process using deep learning networks.  This paper utilizes transfer learning and fine tuning deep convolutional neural networks (CNN) to improve the accuracy of recognizing 32 hand gestures from the Arabic sign language.  The proposed methodology works by creating models matching the VGG16 and the ResNet152 structures, then, the pre-trained model weights are loaded into the layers of each network, and finally, our own soft-max classification layer is added as the final layer after the last fully connected layer.  The networks were fed with normal 2D images of the different Arabic Sign Language data, and was able to provide accuracy of nearly 99%.
A Review Paper on Different Application of Genetic Algorithm for Mobile Ad-hoc Network (MANET)
Authors: Shi Jinfa , Habib Misbah , Yan Hai
Published: May 2020

A Genetic algorithm is a search algorithm depends on the methodology of natural selection and natural genetics. A Mobile Ad hoc network (MANET) is a type of wireless nodes (Devices) which are free to move anywhere in the network without any constraints. The nodes which are in range can communicate each other through radio waves and those who are not in range use any routing algorithm for communication. In this review paper, we focus on the problems of MANET that has been solved by applying GA for it and highlights the characteristic and challenges of MANET in the literature. More specifically, we present the summary of review papers and basic solutions that use and in the last, we present some future direction. Consequently, we concluded that modification in Fitness function (Evaluation function) according to the problem is the base of Genetic algorithm and variation in algorithm parameters can give solutions in a reasonable time.
Development of Teaching Materials by Using Thinking Map on Embryology Learning
Authors: Haviz M
Published: May 2020

The purpose of this study is to develop learning materials by using thinking map in integrative learning model. The research method is educational design research which consist of three stages of preliminary, prototyping and assessment. The data obtained with the validation and test of learning result were analyzed by descriptive statistics. The study participants were 69 students and 3 experts. The result of preliminary research shows that there is diversity of student characteristic in Embryology learning. The teaching material prototype uses a thinking map designed and validated by 3 experts with a valid average result. The results of the implementation test show that the achievement of student learning outcomes on embryology learning with good average value. These results show that the designed prototype matches expectations with the results found. These results also show that the designed product has good internal relevance and consistency. So it is concluded that the learning material is obtained using thinking map on the integrative learning model with good internal relevance and consistency.
Design of Identity-Based Blind Signature Scheme Upon Chaotic Maps
Authors: Tahat Nedal Mohammad , Tahat Ashraf , Albadarneh Ramzi , Edwan Talal
Published: May 2020

Cryptosystems relying on chaotic maps have been presented lately. As a result of inferred and convenient connections amongst the attributes of conventional cryptosystems and chaotic frameworks, the concept of chaotic systems with applications to cryptography has earned much consideration from scientists working in the various domains. Hence, we suggest a novel IDentity-based Blind Signature (ID-BS) based technique in this paper that relies on a pair of hard number theoretic problems, namely, the Chaotic Maps (CM) and FACtoring (FAC) problems. The technique is immune to attacks, in addition to its efficiency in application. Relative to other related schemes, it requires fewer module operations. In summary, our proposed technique is superior to similar schemes within the cryptosystems domain.
Vegetable Waste and Food Waste Treatment Using Modified Aerobic Composting Reactor
Authors: Yuriandala Yebi , Laily Nujumul , Maziya Fina Binazir
Published: May 2020

Sleman Regency, Yogyakarta Province, Indonesia has around 1,056.87 tons of unmanaged waste per day, with 74.22% of its composition is food waste. This phenomenon can be reduced by using an efficient composting method using modified aerobic reactors. The purpose of this research is to identify the quality and quantity of compost as well as larvae (maggots) produced. The research was done for 30 days using two reactors that have different feedstock composition, i.e., the comparison of food waste: vegetable waste of 1:3 (first reactor) and 3:1 (second reactor). The initial mass of each feedstock was 8 kg. The result of composting showed that the compost weight was shrinking by 92.5% in reactor one and 89% in reactor two. The results of the analysis also showed that the second compost reactor had better qualities than reactor one, but the maggot protein content of the first reactor is better than the second reactor. The moisture content in the first reactor did not meet the standards (Indonesian National Standard/SNI of compost), whereas in the second reactor, the standards were achieved with the moisture content being 20.63%; P 1.55%; K 1.45% and C/N 14.03%. The content of NPK in liquid compost produced from the first reactor was 0.18% N; 0.05% P and 0.76% K, while the liquid compost in the second reactor contained 0.30% N; 0.04% P and 0.58% K.
Piloted Simulation Evaluation of Tracking Mission Task Elements for the Assessment of High-Speed Handling Qualities
Authors: Klyde David H. , Pitoniak Sean P. , Schulze P. Chase , Ruckel Paul , Rigsby James , Fegely Cody E. , Xin Hong , Fell William C. , Brewer Roy , Conway Frank , Mulato Ray , Horn Joe , Ott Ltc Carl R. , Blanken Chris L.
Published: May 2020

Updates to the military rotorcraft handling qualities specification are currently being considered that address the high-speed flight regime envisioned for the Future Vertical Lift platform of the U. S. Army. A team that features industry and academia has developed and evaluated a set
of mission task elements (MTEs) that are defined to address vertical takeoff and landing (VTOL) high-speed handling qualities. Following the mission-oriented approach upon which ADS-33E-PRF is based, the MTEs were designed to meet different levels of precision and aggressiveness. Tracking
MTEs based on a sum-of-sines (SOS) command signal were defined for precision, aggressive, and precision, nonaggressive applications. The command signals were derived from fixed-wing analogs that have long been used to evaluate aircraft handling qualities. While the precision, aggressive SOS
tracking tasks, the primary subject of this paper, are surrogates for air-to-air tracking and nap-of-the-earth tracking, the known forcing function allows for complete open- and closed-loop pilot—vehicle system identification. The MTE objectives, descriptions, and performance criteria
were assessed and refined via several checkout piloted simulation sessions. Formal evaluations were then conducted by Army test pilots at four simulator facilities, each featuring a unique high-speed platform including a generic winged-compound helicopter, two tiltrotor configurations, and
a compound helicopter with coaxial rotors. To aid in the MTE evaluation process, baseline VTOL configurations were varied to achieve different handling qualities levels. Quantitative measures based on task performance and qualitative measures based on pilot ratings, comments, and debrief questionnaires
were used to assess MTE effectiveness. The piloted simulation results demonstrated that the SOS tracking MTEs provided an effective means to discern precision, aggressive handling qualities in high-speed flight.
A Review on Smart Helmet for Accident Detection using IOT
Authors: Impana H.C. , Hamsaveni M. , Chethana H.T.
Published: May 2020

As we know that accidents are increasing day by day, we can also notice that many laws and regulations are posed by government in order to avoid this accidents. Accidents can be defined as the unplanned event or the mistake that may occur resulting in injury and sometimes it also leads to death. The accidents in case of two wheelers are more compared to other vehicles. This may be avoided by wearing helmets and riding vehicles without consuming alcohol. This survey is on smart helmet for accidence avoidance and also examining various related techniques. This research also helps us to understand IOT technology which is being emerged now a days. From the literature survey we find that the method proposed using microcontroller RF transmitter and other sensors is cost effective but we find the system proposed using Raspberry pi module, Pi camera, Pressure Sensor, GPS system which uses image processing algorithms is most efficient since the image processing is included so that we can easily detect the use of helmet from the rider. Smart helmet system helps to provide safety and security to the two wheeler riders.
The Higson–Roe sequence for étale groupoids. I. Dual algebras and compatibility with the BC map
Authors: Benameur Moulay-Tahar , Roy Indrava
Published: May 2020

We introduce the dual Roe algebras for proper étale groupoid actions and deduce the expected Higson–Roe short exact sequence. When the action is co-compact, we show that the Roe

C^*

-ideal of locally compact operators is Morita equivalent to the reduced

C^*

-algebra of our groupoid, and we further identify the boundary map of the associated periodic six-term exact sequence with the Baum–Connes map, via a Paschke–Higson map for groupoids. For proper actions on continuous families of manifolds of bounded geometry, we associate with any

G

-equivariant Dirac-type family, a coarse index class which generalizes the Paterson index class and also the Moore–Schochet Connes’ index class for laminations.
О некоторых достаточных условиях гиперболичности
Authors: Glyzin Sergey Dmitrievich , Kolesov Andrei Yurevich , Rozov Nikolai Khristovich
Published: May 2020

Рассматривается произвольный диффеоморфизм $f$ класса $C^1$, действующий из некоторого открытого подмножества $U$ риманова многообразия $M$ размерности $m$, $m\ge 2$, в $f(U)\subset M$. Пусть $A$ - компактное подмножество из $U$, инвариантное для $f$, т.е. $f(A)=A$. Предлагаются различные достаточные условия, при выполнении которых $A$ является гиперболическим множеством диффеоморфизма $f$.
Гeльдерова непрерывность и неравенство Харнака для $p(x)$-гармонических функций
Authors: Alkhutov Yuriy Alexandrovich , Surnachev Mikhail Dmitrievich
Published: May 2020

Получено достаточное условие на измеримый показатель $p(x)$, обеспечивающее гeльдерову непрерывность и неравенство Харнака для $p(x)$-гармонических функций.
Алгебра дифференцирований в некоммутативных групповых алгебрах
Authors: Arutyunov Andronick Aramovich
Published: May 2020

Изучаются алгебры дифференцирований в групповой алгебре для, вообще говоря, бесконечной некоммутативной дискретной группы $G$ в терминах характеров на некотором группоиде, связанном с группой. Получены необходимые условия того, что характер задает дифференцирование. С использованием данных условий разбираются некоторые примеры. В частности, строится описание алгебры дифференцирований для случая, когда группа является нильпотентной группой ранга $2$.
Достаточные условия оптимальности гибридных систем переменной размерности
Authors: Bortakovskii Aleksandr Sergeevich
Published: May 2020

Рассматривается задача оптимального управления гибридной системой, непрерывное движение которой чередуется с дискретными изменениями (переключениями), при которых меняется размерность пространства состояний. Моменты переключений, а также их количество заранее не заданы. Они определяются в результате минимизации функционала, в котором учитываются затраты на каждое переключение. Смена пространства состояний происходит, например, при изменении количества управляемых объектов, что характерно, в частности, для задач управления группами летательных аппаратов переменного состава. Получены достаточные условия оптимальности таких систем. Выведены уравнения для синтеза оптимальных траекторий. Применение условий оптимальности демонстрируется на академических примерах.
Три типа аттракторов и смешанная динамика неголономных моделей движения твердого тела
Authors: Gonchenko Sergei Vladimirovich , Gonchenko Alexander S , Kazakov Aleksei Olegovich
Published: May 2020

Статья представляет собой обзор недавних результатов по теории динамического хаоса с точки зрения топологической динамики. В ней обсуждается концепция трех типов динамики: консервативной, диссипативной и смешанной, а также представлены сравнительно простые примеры аттракторов и репеллеров всех трех типов. Обсуждаются их сходство и различие с другими известными типами аттракторов и репеллеров (максимальными аттракторами и аттракторами Милнора). Также представлены элементы качественной теории смешанной динамики обратимых (реверсивных) систем. В качестве примеров таких систем рассмотрены три неголономные модели движения твердого тела: волчок Суслова, резиновый диск и кельтский камень. Показано, что наблюдаемая в них смешанная динамика имеет разный характер; в частности, модель резинового диска демонстрирует смешанную динамику, чрезвычайно трудно отличимую от консервативной.
Локализованное асимптотическое решение волнового уравнения с переменной скоростью на простейшем декорированном графе
Authors: Tsvetkova Anna Valerievna , Shafarevich Andrei Igorevich
Published: May 2020

Рассматривается волновое уравнение с переменной скоростью на простейшем декорированном графе, полученном приклейкой луча к трехмерному евклидову пространству, с локализованными начальными условиями на луче. Волновой оператор должен быть самосопряженным, что дает некоторые граничные условия в точке склейки. Описана старшая часть асимптотического решения рассматриваемой задачи с использованием конструкции канонического оператора Маслова. Результат получен для всех возможных граничных условий в точке склейки.