bluuebunny/crossref_metadata_2025 huggingface dataset:
Pääoman alkulähteillä
Authors: Kabata Miika
Published: November 2022

Artikkeli tarkastelee Friedrich Engelsin varhaista panosta marxilaisen poliittisen taloustieteen kritiikin muodostumisessa. Artikkelissa pureudutaan niiden metodologisten ja sisällöllisten ideoiden juurille, jotka pian alkoivat jäsentää erityistä marxilaista tutkimusotetta. Samalla se valottaa kysymystä, millaista tietoa ja millä tavoin Karl Marx ja Engels pyrkivät saavuttamaan kriittisen yhteiskuntatieteellisen tutkimusprojektinsa avulla. Engelsin vuoden 1843 nuoruuden kirjoitelmaa Ääriviivoja kansantaloustieteen arvosteluksi (Umrisse) voi pitää marxilaisen poliittisen taloustieteen kritiikin ensimmäisenä ituna. Marx näki Umrissen olleen “nerokas luonnostelma taloudellisten kategorioiden kritiikiksi”. Engels muotoilee teoksessa ensi kertaa metodologisia ja sisällöllisiä ideoita, jotka kuuluvat marxilaisen kapitalismikritiikin erottaviin tunnuspiirteisiin. Marxin Pääoman teoreettisten ideoiden tarkastelu Umrissessa esiintyvien muotoilujen valossa osoittaa, että Engelsin näkyvä ja näkymätön merkitys Marxin poliittisen taloustieteen kritiikin muodostumisessa on ollut moninainen. Engelsin Umrissessa esittämät muotoilut toimivat Marxille metodologisina avaimina hahmotettaessa arvolakia yhteiskunnallisena luonnonlakina, pääoman perustaa ihmistyössä ja kapitalismille ominaisten yhteiskunnallisten muotojen kehkeytymistä tältä pohjalta, arvon ja vaihtoarvon välttämätöntä eroa tavarantuotannon perustalla sekä työttömyyden sääntelelevän roolin keskeisyyttä kapitalistisessa kasautumisessa. Engelsin jälki Pääoman innoittajana tulee esiin myös epäsuorasti Marxin tavassa analysoida ḱapitalistisen kilpailun ja maankoron erityispiirteitä sekä kysynnän ja tarjonnan suhdetta ja kriisien välttämättömyyttä kapitalismissa. Vaikka Umrissea voi pitää vain hahmotelmana, joka sisältää myöhemmän arvo- ja lisäarvoteorian kannalta ristiriitaisia muotoiluja, sen avulla on mahdollista nostaa esille monia tärkeitä teemoja, joita ei ole Pääoman sisältöä ja metodologiaa tarkasteltaessa aina tarpeeksi painotettu.
Innovaatio nykykapitalismin ideologisena arvona
Authors: Ampuja Marko
Published: November 2022

Artikkelissa tarkastellaan kriittisesti innovaatioita koskevia valtavirtanäkemyksiä nyky­kapitalismille ominaisina ajatusmuotoina. Esitys nojautuu ns. Projekt Ideologie-Theo­rien (PIT) kehittelemään ideologiateoreettiseen näkökulmaan ja käsitteistöön. Ideologia­teoreettisesta perspektiivistä innovaatiota voi luonnehtia ”ideologiseksi arvoksi”, johon eri ideologiset mahdit vetoavat pyrkiessään organisoimaan hegemoniaansa. Artikkelissa käydään aluksi läpi hallitsevia tapoja ymmärtää innovaatioita. Tarkastelen yhtäältä suo­malaisen innovaatiopolitiikan kehitystä ja toisaalta taloustieteellisesti suuntautuneen in­novaatiotutkimuksen päälinjoja. Tätä seuraa kuvaus siitä, miten teknologisen innovoin­nin asemaa kapitalismissa on lähestytty marxilaisessa tutkimusperinteessä, minkä jälkeen analysoin innovaatiopuhetta kapitalismin uusliberaalille suhdanteelle ominaisena ilmiönä. Artikkelini keskeisenä väitteenä on, että valtavirtaisella innovaatiopuheella on poliittisesti ja ideologisesti merkittävää populaaria vetovoimaa, joka perustuu sen loihtimille mieliku­ville luovuudesta, yrittäjyydestä, kilpailukyvystä ja talouskasvusta. Ne muodostavat posi­tiivisen markkinaliberaalin vastinparin uusliberalismin autoritaarisille ja kurinalaistaville piirteille. Artikkelin lopussa pohdin sitä, uhkaako uusliberalismin nykyinen ”orgaaninen kriisi” hallitsevien markkinavetoisten innovaationäkemysten asemaa sekä tarkastelen sitä, minkälaisia vaihtoehtoja niille on esitetty.
Evaluation of Von Willebrand Factor and other Coagulation Homeostasis Profile of Patients with Sickle Cell Anaemia attending a Tertiary Hospital at Enugu, Nigeria
Authors: Onoja Solomon Oloche , Eluke Blessing Chukwube , Dangana Amos , Musa Sanusi , Abdullahi Idris Nasir
Published: November 2022

Background:

Sickle cell anaemia (SCA) is a genetic disorder that has been shown to facilitate certain forms of coagulopathy. However, there is a paucity of data that demonstrated these features in Nigerian Sickle cell anaemic patients.

The objective of study:

This prospective study aims to determine the plasma level of vWF, APTT, PT, platelet count and haematological parameters of SCA patients in steady state in comparison with apparently healthy individuals attending the University of Nigeria Teaching Hospital, Enugu, Nigeria.

Materials and Methods:

A total of 85 participants were enrolled in this study. This comprised of 35 homozygous SCA in steady-state as test subjects (HbSS) and 50 apparently healthy individuals of Hb AA as the control group. Blood samples were collected from all participants; both PT and APTT were analysed using Quick and kaolin methods, respectively., vWF was assayed using Enzyme-Linked Immunosorbent Assay (ELISA). Haematological parameters were analysed through the use of an automated haematology analyser.

Results:

There was significant elevation of mean±SD of vWF, APTT and platelet count among SCA patients (52.53 ± 1.45 iu/dl), (48.40 ± 4.99 s) and (287.68 ± 21.43 x109/l) when compared with the mean value in control group (40.16 ±1.50 iu/dl), (33.88 ± 1.34 s) and (219.67 ± 13.9 x109/l) (p< 0.05). However, there were significant decrease in PCV, haemoglobin concentration and red blood cell count among SCA patients, (24.00 ± 0.82 l/l), (7.89 ± 0.24 g/l) and (2.97 ± 0.8 x 1010/l) when compared with control group (40.95 ± 0.73 l/l), (12.44 ± 0.26 g/l) and (4.81 ± 0.11 x 10/l) (p˂ 0.05) respectively. In addition, significant elevation of mean ±SD MCH and MCHC with mean values of (26.63±0.93 pg) and (33.28 ± 0.52 g/l) among subjects when compared with control groups (25.68± 0.47 pg), (30.30 ± 0.18 g/l) (p˂0.005). However, there were no significant differences in WBC, PT and MCV in both study groups.

Conclusion:

Findings from this study demonstrated prolonged coagulation profile, thrombocytosis and leucocytosis among SCA patients in steady state.
ETIKA BERKOMUNIKASI DALAM ISLAM
Authors: Adzah Zahzuli
Published: November 2022

Konsep sistem komunikasi Islam tidak terbatas dalam konteks Islam. Selain itu, konsep komunikasi  memiliki etika, yang merupakan landasan moral bagi sikap dan perilaku manusia ketika berkomunikasi. Al- Qur'an adalah sumber komunikasi, dan komunikasi interpersonal antar kelompok orang adalah salah satu bentuknya. Yang bertujuan untuk menjalin komunikasi interpersonal. Selain itu, Al-Qur'an menggunakan ungkapan Al-Qaul dan Qauan Sadidan untuk berkomunikasi, dan kemampuan berbicara atau berkomunikasidengan baik. Allah swt menyuruh manusia untuk selalu berbicara jujur dan benar.Menurut W.J.S. Poerwadarminta (1991:278), etika memiliki pengertian yang berkaitan dengan pengertian pengetahuan akhlak. Dalam Surah Ar-Rahman ayat 1-4, orang yang berakhlakmulia tidak pernah melupakan tanggung jawabnya, yang meliputi berpegang pada prinsip-prinsip moral yang mendasar dan berbuat apa yang terbaik bagi manusia. Melalui komunikasi, sebuah hubungan dapat terbentuk antara dua orang. Namun, ada kalanya kitaberkomunikasi tanpa memperhatikan etika yang baik. Dalam Q.S. An-Nisa: 9 Allah swt menciptakan hati, atau Fu'ad, agar manusia dapat berpikir dan merasakan. Allah swt telah menyatakan, di mana telah dijelaskan, bagaimana berkomunikasi secara etis secara positifdengan menggunakan bahasa yang benar atau kebohongan.
El Financiamiento de la Expansión Urbana a través de la Documentación del Banco de la Provincia de Córdoba. 1880/1895
Authors: Boixadós María Cristina
Published: November 2022

Se estudia en este artículo la relación entre la actividad del Banco de la Provincia de Córdoba y algunos de sus clientes que participaron notoriamente en los negocios inmobiliarios urbanos, durante la década del ochenta. Se trata en principio, de seguir a través de las Actas del Directorio y de otros papeles públicos el otorgamiento de préstamos y descuento de documentos, muchas veces en condiciones especiales, que suponemos se utilizaron en la compraventa de tierra urbana. En otro plano, queremos corroborar la hipótesis que sostiene que el ejercicio de cargos políticos y de responsabilidad del Banco por un grupo de empresarios y/ o políticos, facilitaron el otorgamiento de créditos ventajosos y luego de la crisis de 1890, permitieron arreglos que contribuyeron a sanear su patrimonio. Se trata en verdad, de una primera aproximación al estudio del problema, ya que se reduce al análisis de algunos casos.
Los Determinantes del Aprendizaje y la Asignación de Recursos Escolares
Authors: Delfino José A.
Published: November 2022

Algunas evaluaciones importantes se dedicaron fundamentalmente a examinar logros educativos, sin considerar el nivel y el impacto de los diferentes factores que componen el proceso de enseñanza. Este trabajo intenta cubrir esa falencia empleando una amplia prueba objetiva que proporciona alguna infor-mación sobre el nivel socioecónomico de los alumnos, complementada con datos sobre las condiciones de los maestros y algunas características de las escuelas.
El Deterioro Organizacional (La Industria Metalmecánica de Córdoba entre 1979/82).
Authors: Alvarez Héctor F.
Published: November 2022

El objetivo de este trabajo es tratar dedetectar, en un grupo de empresas de la rama metalmecánica, si hubo disfunciones que pudieran provocar su deterioro en el período desde 1979 a 1982.
Maurice Allais Premio Nobel de Economía 1988
Authors: Dagum Camilo
Published: November 2022

Discurso de presentación del professor Maurice Allais, Premio Nobel de Ciencias Económicas 1988, en la Universidad de Ottawa, el 23 de Mayo de 1989.
¿Es posible pronosticar la crisis empresarial?
Authors: Alvarez Héctor F.
Published: November 2022

EI pronóstico de la crisis puede atender cualquiera de los orígenes y la existencia de instrumentos que permitan dicho pronóstico. Los aspectos externos comprenden diversos temas: el ciclo económico, la situación del sector al que pertenece una empresa, la política económica de turno y la situación de los mercados. La visión interna de la crisis sugiere que ella proviene desde el interior de la empresa,que se expresa como la incapacidad para atender sus obligaciones financieras a causa de la actuación de sus directivos para enfrentar nuevas situaciones. En cuanto a la predicción de la crisis empresaria existen una diversidad de modelos: modelos contables, modelos estocásticos, modelos de mercado de capitales, modelos basados en la dinámica de sistemas ,modelos basados en la teoría de las catástrofes y el diagnótico de los expertos. Los modelos contables: ratios contables en un contexto univariado, medidas de descomposición de balances, análisis multidiscriminante y modelo "Iogit" son los más conocidos. Nuestra posición es, que sin negar la validez de dichos instrumentos, son algo complejos y no considerán ciertos rubros que consideramos estratégicos para una empresa.
Sustituibilidad de activos y crédito, intermediación financiera y los efectos de perturbaciones monetarias
Authors: Cottani Joaquín A.
Published: November 2022

En este trabajo discutiremos los efectos de perturbaciones monetarias y financieras sobre las tasas de interés, las reservas internacionales y el tipo de cambio nominal en un marco simple de equilibrio de activos en una economía abierta. Nuestro modelo difiere de los convencionales en el sentido de que toma en consideración la intermediación financiera (dinero interno) y plantea una distinción analítica entre sustituibilidad de activos y de préstamos (externos vs. internos).
Normas Contables
Authors: García Norberto
Published: November 2022

El objetivo de este trabajo es analizar la evolución de la teoría contable y su influencia en la confección de normas contables tanto, desde el punto de la literatura internacional como la de nuestro país. La tarea a desarrollar se centrará en los aspectos conceptuales y no es el pro´pósito, en esta oportunidad, referimos a casos concretos en particular.
Noticias de la Facultad. Nomina de trabajos elaborados en el Instituto de Economía y Finanzas
Authors: Instituto de Economía y Finanzas -
Published: November 2022

Trabajos elaborados en el Instituto de Economía y Finanzas. Facultad de Ciencias Económicas - UNC.
El Grado de Desarrollo de la Teoría y la Investigación Contable en la Argentina
Authors: García Norberto
Published: November 2022

El objetivo de este trabajo es determinar en qué etapa del desarrollo de la teoría e investigación contable se éncuentra nuestro país en relación con aquellos que están en los primeros peldaños del conocimiento de dicha disciplina, tales como EE.UU, Inglaterra y Australia, entre otros. Para lograr dicho propósito utilizaremos como marco de referencia la ciencia de los signos o semiótica. Observando y analizando la evolución del pensamiento contable en la Argentina y en dichos países, descubriremos en qué medida se ha hecho uso de los distintos niveles o dimensiones de esta ciencia. De la correspondiente comparación surgirá con bastante claridad la brecha existente en el conocimiento contable, sirviendo por ello para iluminar el camino que deberemos recorrer para estrecharla.
La investigación empírica en contabilidad. Los enfoques en presencia
Authors: Tua Pereda Jorge
Published: November 2022

En los últimos años, la investigación contable,ha apostado decididamente por los trabajos empíricos. Por ello, el momento puede ser bueno, no sólo para animar a los investigadores sino, también, para repasar la trayectoria que, en aquellos países foráneos, ha seguido en las últimas décadas la materia que nos ocupa. Este artículo trata de contribuir modestamente a tales objetivos, analizando brevemente las causas del auge que ha experimentado la investigación empírica relacionada con la información financiera y clasificando someramente los enfoques en presencia, bajo las que pueden clasificarselos muy numerosos trabajos realizados hasta la fecha en relación con este tema en el seno de nuestra disciplina.
Predicting aboveground biomass carbon sequestration potential in hybrid poplar clones under afforestation plantation management in southern Ontario, Canada
Authors: Bazrgar Amir Behzad , Sidders Derek , Thevathasan Naresh
Published: November 2022

Afforestation systems as a pathway for natural climate solutions contributing to terrestrial C sequestration are influenced by agroclimatic conditions, tree species and clones. This study validated a regression equation to predict aboveground biomass C (AGBC) sequestration potentials of hybrid poplar clones under afforestation plantation and compared these clones’ adaptability to three levels of land suitability in four afforestation sites in southern Ontario, Canada. Results validated the proven ability of the GenOnBio model to reasonably predict AGBC content in all tested clones. This research suggests that DN154 and FFC1 having C sequestration rates of 2.19 and 2.13 Mg C ha-1 y-1, respectively, are suitable for marginal lands having high land suitability condition. In contrast, DTAC29, and DTAC26 (0.56 and 0.88 Mg C ha-1 y-1, respectively) should not be selected for the above land suitability. On marginal lands with severe limitations, NM6 (1.53 Mg C ha-1 y-1) showed the highest adaptability for AGBC sequestration. Our findings confirm that poplar afforestation on marginal lands in southern Ontario, at least up to the age of 15 years, can significantly contribute to AGBC sequestration, which in turn can have significant positive influence on the current 2 billion tree planting program initiated by the federal government.
Diverse temperate riparian buffer types promote system-level carbon sequestration in southern Ontario, Canada
Authors: Ofosu Enoch , Bazrgar Amir , Coleman Brent , Deen Bill , Gordon Andrew , Voroney Paul , Thevathasan Naresh
Published: November 2022

Riparian buffer systems (RBSs) can sequester atmospheric carbon dioxide into terrestrial carbon (C) pools. C stocks and C sequestration potential of diverse RBSs are not adequately reported. This study, therefore, quantified: (a) C stocks in various RBSs and (b) system-level C sequestration potentials (SLCSP) [SLCSP= ΔSOC + Biomass C Pools] in southern Ontario, Canada. Results showed significant differences (p < 0.05) in system-level C stocks between tree buffers (765.8 Mg C ha-1) and grass buffers (291.7 Mg C ha-1) and between natural forest buffers (935.9 Mg C ha-1) and rehabilitated buffers (595.6 Mg C ha-1), but no difference (p > 0.05) between coniferous buffers (722.4 Mg C ha-1) and deciduous buffers (809.1 Mg C ha-1) were recorded. Tree buffers had higher SLCSP (633.5 Mg C ha-1) than grass buffers (126.7 Mg C ha-1). Natural forest buffers had higher SLCSP (806.7 Mg C ha1) than rehabilitated buffers (460.3 Mg C ha-1). There was no difference (p > 0.05) in SLCSP between coniferous buffers (615.0 Mg C ha-1) and deciduous buffers (652.1 Mg C ha-1). Results from this study confirm that the establishment of RBSs within agricultural watersheds can significantly contribute to create new terrestrial C sinks.
Symbolic Dynamics in the Free-Fall Equal-Mass Three-Body Problem
Authors: Mylläri Aleksandr , Martynova Alija , Orlov Victor , Chernin Arthur
Published: November 2022

Free-fall equal-mass three-body systems are numerically studied using symbolic dynamics. We scan the two-dimensional homology map of initial configurations in steps of 0.001 along both axes. States of binary and triple encounters as well as changes of configuration are used to construct symbolic sequences. Symbolic sequences are characterized by Shannon and Markov entropies. Different ergodic components corresponding to different distinct peaks on the histograms of these entropies are revealed.
On the Vertex Separation of Cactus Graphs
Authors: Markov Minko
Published: November 2022

This paper is part of a work in progress whose goal is to construct a fast, practical algorithm for the vertex separation (VS) of cactus graphs. We prove a \main theorem for cacti", a necessary and sufficient condition for the VS of a cactus graph being k. Further, we investigate the ensuing ramifications that prevent the construction of an algorithm based on that theorem only.
A Computer Algebra Application to Determination of Lie Symmetries of Partial Differential Equations
Authors: Pulov Vladimir , Chacarov Edy , Uzunov Ivan
Published: November 2022

A MATHEMATICA package for finding Lie symmetries of partial differential equations is presented. The package is designed to create and solve the associated determining system of equations, the full set of solutions of which generates the widest permissible local Lie group of point symmetry transformations. Examples illustrating the functionality of the package's tools are given. The results of the package application to performing a full Lie group analysis of coupled nonlinear Schrödinger equations from nonlinear fiber optics are presented. Comparisons with earlier published computer algebra implementations of the Lie group method are discussed.
Improving the Watermarking Process with Usage of Block Error-Correcting Codes
Authors: Berger Thierry , Todorov Todor
Published: November 2022

The emergence of digital imaging and of digital networks has made duplication of original artwork easier. Watermarking techniques, also referred to as digital signature, sign images by introducing changes that are imperceptible to the human eye but easily recoverable by a computer program. Usage of error correcting codes is one of the good choices in order to correct possible errors when extracting the signature. In this paper, we present a scheme of error correction based on a combination of Reed-Solomon codes and another optimal linear code as inner code. We have investigated the strength of the noise that this scheme is steady to for a fixed capacity of the image and various lengths of the signature. Finally, we compare our results with other error correcting techniques that are used in watermarking. We have also created a computer program for image watermarking that uses the newly presented scheme for error correction.
Conceptual Information Compression and Efficient Pattern Search
Authors: Angelova Galia , Mihov Stoyan
Published: November 2022

This paper introduces an encoding of knowledge representation statements as regular languages and proposes a two-phase approach to processing of explicitly declared conceptual information. The idea is presented for the simple conceptual graphs where conceptual pattern search is implemented by the so called projection operation. Projection calculations are organised into off-line preprocessing and run-time computations. This enables fast run-time treatment of NP-complete problems, given that the intermediate results of the off-line phase are kept in suitable data structures. The experiments with randomly-generated, middle-size knowledge bases support the claim that the suggested approach radically improves the run-time conceptual pattern search.
Solving Ratio-Dependent Predator-Prey System with Constant Effort Harvesting using Variational Iteration Method
Authors: Barari Amin , Ghotbi Abdoul R. , Omidvar Mehdi , Ganji Davood Domiri
Published: November 2022

Due to wide range of interest in use of bio-economic models to gain insight into the scientific management of renewable resources like ﬁsheries and forestry,variational iteration method (VIM) is employed to approximate the solution of the ratio-dependent predator-prey system with constant eﬀort prey harvesting.The results are compared with the results obtained by Adomian decomposition method and reveal that VIM is very eﬀective and convenient for solving nonlinear differential equations.
Use of Start Pages for Building a Mashup Personal Learning Environment to Support Self-Organized Learners
Authors: Ivanova Malinka
Published: November 2022

The paper explores the functionalities of eight start pages and considers their usefulness when used as a mashable platform for deployment of personal learning environments (PLE) for self-organized learners. The Web 2.0 effects and eLearning 2.0 strategies are examined from the point of view of how they influence the methods of gathering and capturing data, information and knowledge, and the learning process. Mashup technology is studied in order to see what kind of components can be used in PLE realization. A model of a PLE for self-organized learners is developed and it is used to prototype a personal learning and research environment in the start pages Netvibes, Pageflakes and iGoogle.
On Solving the Maximum Betweenness Problem Using Genetic Algorithms
Authors: Savić Aleksandar
Published: November 2022

In this paper a genetic algorithm (GA) is applied on Maximum Betweennes Problem (MBP). The maximum of the objective function is obtained by finding a permutation which satisfies a maximal number of betweenness constraints. Every permutation considered is genetically coded with an integer representation. Standard operators are used in the GA. Instances in the experimental results are randomly generated. For smaller dimensions, optimal solutions of MBP are obtained by total enumeration. For those instances, the GA reached all optimal solutions except one. The GA also obtained results for larger instances of up to 50 elements and 1000 triples. The running time of execution and finding optimal results is quite short.
Computing with the Square Root of NOT
Authors: De Vos Alexis , De Beule Jan , Storme Leo
Published: November 2022

To the two classical reversible 1-bit logic gates, i.e. the identity gate (a.k.a. the follower) and the NOT gate (a.k.a. the inverter), we add an extra gate, the square root of NOT. Similarly, we add to the 24 classical reversible 2-bit circuits, both the square root of NOT and the controlled square root of NOT. This leads to a new kind of calculus, situated between classical reversible computing and quantum computing.
Operational Methods in the Environment of a Computer Algebra System
Authors: Spiridonova Margarita
Published: November 2022

The presented research is related to the operational calculus approach and its representative applications. Operational methods are considered, as well as their program implementation using the computer algebra system Mathematica. The Heaviside algorithm for solving Cauchy’s problems for linear ordinary differential equations with constant coefficients is considered in the context of the Heaviside-Mikusinski operational calculus. The program implementation of the algorithm is described and illustrative examples are given. An extension of the Heaviside algorithm, developed by I. Dimovski and S. Grozdev, is used for finding periodic solutions of linear ordinary differential equations with constant coefficients both in the non-resonance and in the resonance cases. The features of its program implementation are described and examples are given. An operational method for solving local and nonlocal boundary value problems for some equations of the mathematical physics (the heat equation, the wave equation and the equation of a free supported beam) is developed and the capabilities of the corresponding program packages for solving those problems are described. A comparison with other methods for solving the same types of problems is included and the advantages of the operational methods are marked.
One-Parameter Bifurcation Analysis of Dynamical Systems using Maple
Authors: Borisov Milen , Dimitrova Neli
Published: November 2022

This paper presents two algorithms for one-parameter local bifurcations of equilibrium points of dynamical systems. The algorithms are implemented in the computer algebra system Maple 13 © and designed as a package. Some examples are reported to demonstrate the package’s facilities.
Geografías de la paternidad no residente : ¿ausente o vinculado?
Authors: Brullet Cristina
Published: November 2022

Las familias catalanas están cambiando rápidamente. A pesar de que España es un país donde las tasas de divorcios han permanecido bajas en comparación con otros países europeos, en Cataluña, más de un 13% de adolescentes de entre doce y dieciséis años viven en un hogar monoparental. A este dato, hay que añadir otro 6% de hijos que residen con un solo progenitor y su nueva pareja (hogar reconstituido). La tendencia indica que, en los próximos años, un mayor número acabará residiendo en algún momento sólo con la madre o también con su nueva pareja. Este artículo explora el papel del padre no residente en el hogar como proveedor de cuidados, apoyo económico y educativo después de una ruptura conyugal. La investigación previa ha relacionado la ausencia del padre biológico con niveles más altos de angustia emocional, desvinculación escolar y con un aumento en índice de delincuencia. A partir de una explotación específica de datos del Panel de Familias e Infancia, nuestra investigación explora la frecuencia y la calidad de la interacción entre los adolescentes y su padre no residente en el hogar habitual de los hijos. Trabajamos con una muestra de 521 adolescentes que viven en hogares monoparentales o reconstituidos (con su madre) y que fueron entrevistados en la primera ola de la encuesta (2006). Basados en análisis estadísticos, nuestros resultados muestran que el apoyo paterno tiene una influencia positiva en los resultados educativos de los adolescentes, además de otras influencias, cuando los vínculos se mantienen fuertes a pesar de vivir en hogares diferentes.
El divorcio como nudo biográfico : una revisión de la literatura reciente desde la perspectiva de la vulnerabilidad postdivorcio
Authors: García Pereiro Thaís
Published: November 2022

En el presente artículo, se plantea un nuevo enfoque teórico para el estudio del postdivorcio que encuentra sus bases conceptuales en la perspectiva de la vulnerabilidad, y sus bases empíricas, en una revisión de la literatura más reciente acerca de las consecuencias del divorcio en los ámbitos económico, de la salud y del bienestar general. Se entiende el proceso de divorcio como un nudo biográfico que marca la entrada a un contexto de riesgo en el que los actores deben forzosamente replantearse su proyecto vital. Dentro del enfoque de vulnerabilidad postdivorcio, entran en juego una serie de factores que afectan al proceso de ajuste a dicha situación. Por una parte, están los factores activadores, que son leídos como señales de la vulnerabilidad, y, por otra, los factores mediadores, que potencian o disminuyen la capacidad de respuesta de los individuos que han experimentado la ruptura. La comprensión del postdivorcio como un proceso generador de vulnerabilidades constituye un desarrollo novedoso y un aporte necesario para avanzar en el conocimiento científico del mismo desde un punto de vista sociodemográfico.
Electrochemical sensors for the safety and quality control of cosmetics: An overview of achievements and challenges
Authors: Dodevska Totka , Hadzhiev Dobrin , Shterev Ivan
Published: November 2022

Due to the rapid growth of the cosmetic industry in recent years, the development of new, reliable, cost-effective, ease of use and rapid methods to assay cosmetics’ quality is of particular importance. Modern electrochemistry provides powerful analytical techniques with excellent sensitivity, instrumental simplicity and portability, providing reliable alter­natives to conventional analytical methods. This review aims to give readers a clear view of advances in areas of electrode modification, successful strategies for signal amplification, and miniaturization techniques used in electro­analytical devices for cosmetics control and safety. We have summarized recent trends in the nonenzymatic electrochemical sensor sys­tems applied in the analysis of cosmetic products revealing that there are a variety of ef­ficient sensors for whitening agents, preservatives, UV filters, heavy metals, etc. In con­clu­sion, current challenges related to the sensors design and future perspectives are outlined.
Connaissances ethnoécologiques des variétés locales de Mangifera indica L. dans l’Atacora au Bénin : usages, diversité et perceptions du changement climatique
Authors: ADJACOU Dowo Michée , HOUEHANOU Thierry Dehouegnon , GOUWAKINNOU Gérard Nounagnon , NATTA Armand Kuyema
Published: November 2022

Les variétés locales de Mangifera indica sont des anciens fruitiers, cultivés en Afrique de l’Ouest et qui contribuent à la sécurité alimentaire. Malgré les diverses potentialités et atouts de ces variétés, elles sont peu connues de la recherche comparativement aux variétés améliorées. Pour une valorisation, une conservation et une gestion durable de cette importante ressource phytogénétique au Bénin, une étude ethnoécologique a été conduite et vise à documenter les connaissances locales liées aux usages des variétés locales, leurs caractéristiques distinctives et les perceptions sur l’effet des changements climatiques. Ainsi, une enquête ethnoécologique basée sur une approche participative a été conduite dans 15 villages choisis dans trois communes de l’Atacora : Natitingou, Tanguiéta, et Toucountouna. Au total, 115 personnes ont été enquêtées à base d’un questionnaire semi-structuré. Les données ont été traitées avec les indices ethnobotaniques et analysées avec le test exact de Fisher, le test Khi-2 d’indépendance et les analyses multivariées.  L’étude a révélé que la population reconnaît deux variétés locales et que les raisons liées aux choix de ces variétés sont la facilité d’acquisition des fruits et la contribution de l’espèce au revenu. La forme des fruits était le principal critère de différenciation des deux variétés. L’alimentation et la médecine traditionnelle constituent les deux catégories d’usages les plus importantes suivies des bois d’énergie et le service d’ombrage. La population percevait le changement climatique à travers principalement la rareté des pluies, les poches de sécheresse, l’arrêt précoce des pluies et le retard des pluies alors que   les pertes de fruits et les pourritures de fruit sont perçues comme les principaux effets du changement climatique sur l’espèce. Les connaissances ethnoécoloqiques évaluées peuvent servir de base pour une caractérisation morphologique et d’outils pour la gestion durable et la conservation des variétés locales de Mangifera indica au Bénin.
Ultrasound measurement of the optic nerve sheath diameter in traumatic brain injury: a narrative review
Authors: Natile M , Simonet O , Vallot F , De Kock M
Published: November 2022

Background : Raised intracranial pressure (ICP) needs to be investigated in various situations, especially in traumatic brain injury (TBI). Ultra-sonographic (US) measurement of the optic nerve sheath diameter (ONSD) is a promising noninvasive tool for assessing elevated ICP. Objectives : This narrative review aimed to explain the history of and indications forUS measurement of ONSD. We focused on the detection of elevated ICP after TBI and discussed the possible improvements in detection methods. Conclusions : US measurement of ONSD in TBI cases provides a qualitative but no quantitative assessment of ICP. Current studies usually calculate their own optimum cutoff value for detecting raised ICP based on the balance between sensitivity and specificity of the method when compared with invasive methods. There is no universally accepted threshold. We did not find any paper focusing on the prognosis of patients benefiting from it when compared with usual care. Another limitation is the lack of standardization. US measurement of ONSD cannot be used as the sole technique to detect elevated ICP and monitor its evolution, but it can be a useful tool in a multimodal protocol and it might help to determine the prognosis of patients in various situations.
Expansão da cana-de-açúcar e as mudanças no uso da terra nas mesorregiões de Araraquara, Assis e São José do Rio Preto: um estudo de mudanças no uso da terra a partir de modelo shift-share.
Authors: José Piacente Fabricio , de Cillos Silva Vanessa
Published: November 2022

The objective of this study is analyze the changes in land use in mesoregions of Araraquara, Assis and São José do Rio Preto caused expansion of the sugarcane and other important agricultural activities. Were used shift-share method, which allowed the analysis of the variation of cultivated areas, broken down into effects scale and replacement. The analysis occured in two distinct periods: expansion of sugar cane (2000-2009) and crisis in the sugarcane industry (2010-2014). The growing participation of sugarcane occured basically by the incorporation of new cultivable areas and the replacement areas occupied by various crops, especially areas cultivated with pastures.
Levantamento censitário por unidades de produção agropecuária 2016/17.
Authors: Azarias Martins Vagner , Viani Caser Denise , Alberto Angelo José , José Coelho Paulo , José Torres Antonio
Published: November 2022

The 2016-17 Census Survey by Agricultural Production Units (LUPA) is the third conducted by the Secretary of Agriculture and Supply of the State of São Paulo (SAA-SP) through the Institute of Agricultural Economics (IEA) and the Sustainable Regional Development Coordination Office (CDRS). The census depicts São Paulo's agriculture in quantitative terms, thus being a source for several studies and the development of public policies for the sector. Specifically, this article brings the innovations used in this census and the main statewide results, such as the 4.6% expansion in the number of agricultural production units, reaching almost 340 thousand; the growth of natural vegetation areas, and the improvement in rural landowners’ education.
Phyllanthus tenellus Roxb. and Kaempferia parviflora Wall. ex Baker compounds as inhibitors of SARS-CoV-2 main protease and RNA-dependent RNA polymerase: A molecular docking study
Authors: Supian Suhaina , Ahmad Muhamad Aizuddin , Rozano Lina , Chandradevan Machap , Rahman Zuraida Ab
Published: November 2022

Context: The outbreak of a novel coronavirus, SARS-CoV-2 has caused an unprecedented COVID-19 pandemic. To put an end to this pandemic, effective antivirals should be identified or developed for COVID-19 treatment. However, specific and effective antivirals or inhibitors against SARS-CoV-2 are still lacking. Aims: To evaluate bioactive compounds from Phyllanthus tenellus and Kaempferia parviflora as inhibitors against two essential SARS-CoV-2 proteins, main protease (Mpro) and RNA-dependent RNA polymerase (RdRp), through molecular docking studies and to predict the drug-likeness properties of the compounds. Methods: The inhibition potential and interaction of P. tenellus and K. parviflora compounds against Mpro and RdRp were assessed through molecular docking. The drug-likeness properties of the compounds were predicted using SwissADME and AdmetSAR tools. Results: Rutin and ellagic acid glucoside from P. tenellus and 4-hydroxy-6-methoxyflavone and 5-hydroxy-3,7,4’-trimethoxyflavone from K. parviflora exhibited the highest binding conformations to Mpro by interacting with its substrate binding site that was predicted to halt the Mpro activity. As for RdRp, ellagitannin and rutin from P. tenellus and peonidin and 5,3’-dihydroxy-3,7,4’-trimethoxyflavone from K. parviflora were the best-docked compounds that bound to the RdRp catalytic domain (Asp760 and Asp761) and NTP-entry channel that were anticipated to stop RNA polymerization. However, in the context of drug developability, 4-hydroxy-6-methoxyflavone, 5-hydroxy-3,7,4’-trimethoxyflavone, peonidin and 5,3’-dihydroxy-3,7,4’-trimethoxyflavone from K. parviflora were highly potential to be oral active drugs compared to rutin, ellagic acid glucoside and ellagitannin from P. tenellus. Conclusions: P. tenellus and K. parviflora compounds, particularly the aforementioned compounds, were suggested as potential inhibitors of SARS-CoV-2 Mpro and RdRp.
The Current Status of Metal-Organic Frameworks (MOFs) for Use in Liquid Chromatography
Authors: Bell David S.
Published: November 2022

Metal-organic frameworks (MOFs) are self-assembled combinations of metals and inorganic ligands that result in a relatively young class of highly ordered, porous materials. Because of the number of structural and chemical possibilities, high surface area, controlled pore volume, and favorable thermal properties, MOFs are being investigated in several fields, including chromatography. Because of the enormous interest in a 2018 “Column Watch” article on the subject and the high level of research in the field, this article explores recent (2019–present) activity specifically toward the application of MOFs for liquid chromatography (LC).
Pengaruh Pemberian Temulawak (Curcuma xanthoriza,roxb) dalam Pakan terhadap Penampilan Produksi Ayam Broiler
Authors: Sariati Sariati , Nuraini Nuraini , Pagala Muh Amrullah
Published: November 2022

Produktivitas ayam broiler ditentukan oleh kuantitas dan kualitas pakan yang dikonsumsi, termasuk bahan-bahan yang ditambahkan dalam pakan seperti temulawak. Penelitian ini bertujuan untuk mengetahui pengaruh temulawak dalam pakan terhadap penampilan produksi ayam broiler. Penelitian menggunakan 80 ekor ayam broiler yang dipelihara selama 5 minggu dengan pakan komersial BP11 dan temulawak. Penelitian  menggunakan rancangan acak lengkap (RAL) dengan 4 perlakuan yakni P0 (BP11 tanpa temulawak), P1 (BP11 + temulawak 1%), P2 (BP11 + temulawak 2%), P3 (BP11 + temulawak 3%) dengan 4 ulangan. Variabel yang diteliti adalah konsumsi pakan, pertambahan bobot badan (PBB), dan konversi pakan. Hasil penelitian menunjukkan bahwa pemberian temulawak 1-3% pada pakan ayam broiler menunjukkan pengaruh yang tidak nyata (P>0,05) terhadap konsumsi pakan, PBB, dan konversi pakan  ayam  broiler
Pengaruh Pemberian Aminovit® Terhadap Bobot Telur, FCR dan Produksi Telur Ayam Kampung Fase Layer
Authors: Irwan Irwan , Has Hamdan , Saili Takdir
Published: November 2022

Ayam kampung (Gallus domesticus) berasal dari ayam hutan merah (Gallus gallus) yang telah berhasil dijinakkan dan merupakan salah satu ayam yang mampu bereproduksi dengan pemberian pakan yang bernutrisi rendah namun produksi telur masih relatif rendah. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian AMINOVIT® terhadap peningkatan produksi telur ayam kampung. Materi penelitian ini menggunakan 20 ekor ayam kampung betina fase layer dengan bobot badan rata-rata 1629,40±65,43 gram. Bahan pakan yang digunakan berupa jagung, dedak dan konsentrat gold (BP 12) dan AMINOVIT®. Perlakuan penelitian adalah dosis aminovit yang berbeda terdiri atas P0 (0 gram/ekor/hari), P1 (0,062 g/ekor/hari), P2 (0,125 g/ekor/hari), P3 (0,188 g/ekor/hari). Rancangan penelitian ini menggunakan rancangan acak lengkap (RAL) 4 perlakuan dan 5 ulangan, data yang diperoleh dianalilis dengan menggunakan analilis ragam dengan tingkat kesalahan 5%. Data yang berpengaruh nyata diuji menggunakan beda nyata terkecil (BNT). Variabel yang diamati yaitu: produksi telur, bobot telur, dan FCR. Hasil penelitian menunjukan bahwa pemberian feed suplemen AMINOVIT® tidak berpengaruh nyata (P<0,05) terhadap bobot telur, tetapi dapat menurunkan FCR dan meningkatkan produksi telur ayam kampung. kesimpulan dalam penelitian ini yaitu AMINOVIT® dapat digunakan hingga taraf 0,188 g/ekor/hari.
Mosquito Repellent Property of “Ylang-Ylang” (Cananga odorata) Essential Oil in Urea-Formaldehyde Microencapsulated Cotton Fabric
Authors: Reyes Eriko Lois , Menor Marvin , Munsayac Michelle , Notario John Bryan , Ogaco Gianne Henriette , Perez Jueliand Peter , Ramos Eleanor Kay , Tengco Susan Geraldine , Rio Phyllis , Hilario Allan
Published: November 2022

Common mosquito-borne diseases in the Philippines include dengue, Chikungunya, Japanese encephalitis, malaria, and filariasis. Mosquito repellents are effective protective measures against mosquito bites and microencapsulation of essential oils to fabric is currently an emerging trend for mosquito repellency. Accordingly, “ylang-ylang” (Cananga odorata) is a fast-growing tree endemic to the Philippines and found to have mosquito repellent properties. This study aimed to determine the mosquito repellency of microencapsulated ylang-ylang oil applied to cotton fabrics. The difference in the mosquito repellent property between untreated and treated fabrics in different concentrations of microencapsulated ylang-ylang oil was tested. The prepared microcapsules containing 10 mL and 2.5 mL ylang-ylang oil were applied to separate cotton fabrics using a bath exhaustion method. The fabrics were examined using a scanning electron microscope and showed irregularly shaped and rough-walled microcapsules with sizes ranging 50–100 μm. The fabrics were then tested for mosquito repellency using the World Health Organization (WHO) cone test in five replicates. An untreated fabric served as negative control. The test of significance used the one-way analysis of variance (ANOVA), and the p-value was set at p < 0.05. The fabrics treated with 10 mL and 2.5 mL microcapsules showed increasing rates of mosquito repellency from 80 ± 10% to 88 ± 8.37% and from 64 ± 5.48% to 82 ± 8.37%, respectively (p < 0.05). The mosquito percent repellency showed a significantly higher % repellency in treated than the untreated fabric (p < 0.05). The fabric with microcapsules containing 10 mL of ylang-ylang oil has greater mosquito repellency than that of 2.5 mL (p < 0.05). In conclusion, this study suggests the potential of urea-formaldehyde microencapsulation as an effective method in making cotton fabrics with mosquito repellent properties using ylang-ylang (Cananga odorata) essential oil.
Resistance Screening and Influence of Fruit Physico-biochemical Properties of “Carabao” and Other Mango Varieties Against Oriental Fruit Fly, Bactrocera dorsalis (Diptera: Tephritidae), in the Philippines
Authors: Sison Maria Luz , Cortaga Cris , Barcos Ana Kristine , Laurel Niño , Mateo John Marty , dela Cueva Fe
Published: November 2022

The Philippines is one of the major exporters of fresh and dried mangoes in the world, with “Carabao” (Mangifera indica L.) as its flagship variety. Among the most damaging pests that attack this cultivar is the oriental fruit fly, Bactrocera dorsalis Hendel, which limits the country’s export potential drastically. The control and management of this pest have been developed, however, the search and use of resistant cultivars have not been explored in the Philippines. In this study, a total of 33 mango accessions consisting of “Carabao” and other varieties were evaluated for resistance against B. dorsalis over a period of four years (one trial per year) through ‘choice’ tests. Repeated trials showed that accessions 12-209 (“Carabao” – Tree 203), 12-127 (“Carabao” – Tree 30), 12-103 (“Farrales”), and 16-010 (GES 77 NSIC Carabao variety) exhibited promising resistance ratings (i.e. no damage to moderately susceptible) against oriental fruit fly. Overall correlation analysis of fruit physico-biochemical properties revealed that insect visit is moderately affected by flesh flavonoid content. Meanwhile, adult emergence correlated to peel physicobiochemical properties, especially peel firmness, which considerably affected insect reproduction. Comparison between the most resistant and most susceptible accessions suggests that, apart from high flesh flavonoids and peel firmness, high flesh phenolics and low pH (acidic) levels may also play a defensive role in mango against oriental fruit fly. The accessions characterized can be used as stop-gap varieties or as parental lines for the breeding of resistant “Carabao” mango.
Cytological Observations and In Vitro Germination of Nipa (Nypa fruticans Wurmb., Arecaceae) Pollen
Authors: Mantiquilla Junaldo , Chispa Keren Mnhz , Ladjahassan Salsabel , Abad Reynaldo
Published: November 2022

The staminate rachillae from laterals of nipa (Nypa fruticans Wurmb.) at different stages of inflorescence development were sampled for cytological observations using squash technique, with 2% acetocarmine as the stain. Results showed that the dividing microsporocytes exhibited a tetrad in tetragonal shape enclosed in thick callose walls at the end of meiosis II. The microspore products consisted not only of uninucleate but also of binucleate and trinucleate pollen during anthesis. Meiotic stages were interpreted as highly normal, which suggests high pollen viability. In vitro germination observed every 4-h intervals for 24 h showed that sucrose level at 15% attained significantly highest germination at 53%. The germinated pollen developed a knob protrusion instead of an elongated pollen tube. There was a significant difference in pollen knob length at 15% sucrose measuring 9.6 µm, the longest observed, compared to the control. With significant interaction between sucrose and boron levels, 10% and 15% sucrose levels achieved higher in vitro germination when combined with 0.01% and 0.005% boron, respectively. Indeed, sucrose and boric acid consisting of the liquid medium can initiate nipa pollen germination, confirming earlier results with lower concentrations.
Comparative Study of Heuristic Algorithms for Electrical Impedance Tomography
Authors: Velasco Arrianne Crystal , Darbas Marion , Mendoza Renier , Bacon Monica , de Leon John Cedrick
Published: November 2022

Based on electrical measurements from electrodes placed around the boundary of a body, electrical impedance tomography (EIT) is an imaging procedure that recovers the spatial distribution of the conductivities in the interior of a body. Recent studies have shown promising results in reconstructing EIT images using heuristic algorithms. This work presents a study of the applicability of six heuristic algorithms – firefly algorithm (FA), novel bat algorithm (NBA), genetic algorithm with new multi-parent crossover (GA-MPC), success history-based adaptive differential evolution with linear population size reduction with semiparameter adaptation hybrid with covariance matrix adaptation evolutionary strategy (LSHADE-SPACMA), ensemble sinusoidal differential covariance matrix adaptation (LSHADE-cnEpSin), and effective butterfly optimizer with covariance matrix adapted retreat phase (EBOwithCMAR) – for the EIT image reconstruction problem. These algorithms have never been employed to solve the EIT inverse problem. Series of numerical tests were carried out to compare the performance of the selected algorithms.