bluuebunny/crossref_metadata_2025 huggingface dataset:
Putting Cities in the Framework of Sustainable Development; Evolution, Evaluation and Features of SDG 11
Authors: METAXAS Ioannis , METAXAS Theodore
Published: July 2023

The purpose of this paper is to analyze in first basis, how the International Community, reached the adoption of the SDG’s goals, and to discuss the assets and the problems, the omissions of these goals. Then, this text will give emphasis to the inclusiveness, resilience, safety and sustainability of the cities, and will indicate the extent that those goals were well – promoted and protected under the Millennium Sustainable Development Goals (MDGs) and the Sustainable Development Goals. Moreover, this assignment, will trace the upgrade and integration of these goals into an entrenched and united goal (Goal 11 of Sustainable Development) and the current developments and problems that seem to emerge, mostly regarding the sustainability of the cities. Furthermore, this paper will try to prove the strong linkage between SDG 3 (Good Health – Well Being) and SDG 11.
Land Areas Management for Development of Tourism Different Types
Authors: SHAIMERDENOVA Aigul , NURPEISSOV Madi , AKHMETOVA Kamshat , GARKUSHINA Valentina
Published: July 2023

This paper discusses the importance of the use of land resources for the development of tourism and recreational activities. The study of economic mechanisms of nature management stimulates interest in various forms of tourism, such as ecotourism, agrotourism, forest tourism. The expansion of the tourism industry, combined with a decrease in international tourist flows, leads to an increase in the number of specially protected natural areas. Land management is a system of measures aimed at compliance with land legislation, regulation of land relations and ensuring the rational use and conservation of land resources. The influence of factors connected with natural and cultural features of tourist places influences the development of land resources. In this paper, some researches are conducted to analyze how an efficient land management can stimulate different types of tourism.
Tourism Development and Local Community Welfare: A Case Study of the Mandalika Special Economic Zone
Authors: YULI Sri Budi Cantika , SEPTIANI Emilia , PRAMUJA Risky Angga , SUPIANDI Supiandi , NAJMUDIN Mohamad
Published: July 2023

This study aims to investigate the impact of tourism development on the welfare of local communities in the Mandalika Special Economic Zone (SEZ), Indonesia. Data were collected through semi-structured interviews with key informants, as well as a review of secondary sources. The results indicate that the development of tourism in Mandalika has had a positive impact on the welfare of the local community, specifically in the areas of education, economy, and health. The increase in the number of schools and training programs for entrepreneurship has equipped individuals with the necessary knowledge and skills to become self-sufficient entrepreneurs, which has fostered an entrepreneurial mindset. Additionally, there has been an increase in income and employment opportunities for the local community, with the opening of various types of jobs both informally and formally. Finally, tourism has contributed to improving health facilities such as hospitals, health centers, and clinics. However, this study is limited by the small sample size and the focus on a specific area, which may not be generalizable to other contexts. Future research should explore the impact of tourism development on other aspects of local community welfare and consider the potential negative impacts of tourism development on the environment and cultural heritage.
Brain Glutathione Increase and Seizure Burden Decrease in Patients with Intractable Epilepsy on Ketogenic Diet
Authors: Hazany Saman , DeClouette Brittany , Lowe Jessica , Hwang Darryl H , Kim Paul E , Bluml Stefan , Partikian Arthur
Published: June 2023

Background and Purpose: Ketogenic diet (KD) improves seizure control in patients with drug-resistant epilepsy. As increased mitochondrial levels of glutathione (GSH) might contribute to a change in seizure susceptibility, we quantified changes of absolute GSH levels in the brain by in vivo 1H magnetic resonance spectroscopy (1H MRS) and correlate that with degree of seizure control in patients on KD.Methods: Five cognitively normal adult patients with drug-resistant epilepsy were initially included and 2 completed the study. Each patient was evaluated by a neurologist and registered dietitian at baseline, 1, 3, and 6 months for seizure status and diet adherence after initiation of a modified atkins diet. Multiple metabolites including GSH were quantified using LCModel (version 6.3-1P; Stephen Provencher, Oakville, ON, CA) on a short echo time single-voxel 1H MRS in parieto/occipital grey matter and parietal white matter on a 3 Tesla General Electric magnet prior to starting the ketogenic diet and at 6 months.Results: Both patients (42-years-old male and 35-years-old female) demonstrated marked increases in absolute GSH level in both gray matter (0.12 to 1.40 and 0.10 to 0.70 international unit [IU]) and white matter (0.65 to 1.50 and 0.80 to 2.00 IU), as well as 50% improvements in seizure duration and frequency. Other metabolites including ketone bodies did not demonstrate consistent changes.Conclusions: Markedly increased levels of GSH (7-fold and 14-fold) were observed in longitudinal prospective study of two adult patients with intractable epilepsy with 50% seizure improvement after initiation of ketogenic diets. This pilot study supports the possible anticonvulsant role of GSH in the brain.
A comparative study on the mechanical properties of African teff and snake grass fiber-reinforced hybrid composites: effect of bio castor seed shell/glass/SiC fillers
Authors: Manickaraj K. , Ramamoorthi R. , Sathish S. , Johnson Santhosh A.
Published: June 2023

The environmental awareness and sustainable nature of plant-based fibers have forced material researchers and automakers to use natural fibers instead of petroleum-based fibers for various industrial applications. The need for environmentally and biodegradable fibers has created a demand in the transportation industry. In this study, bio castor seed shell (C), glass fiber (G), and SiC (SC) fillers in a constant weight fraction (10 %) were reinforced separately with varying weight fractions (5–25 %) of African teff and snake grass fibers to improve the mechanical properties of the hybrid composites. Both African teff and snake grass fibers were subjected to alkaline treatment to remove amorphous elements such as hemicellulose, lignin, and wax, resulting in high surface roughness. The hybrid composites were fabricated by the compression molding technique and their mechanical properties were characterized as per ASTM standards. The fractured surface of the treated fiber was examined by scanning electron microscopy. From the results, it was found that SC10SG20AT showed maximum mechanical properties compared to C10SG20AT and G10SG20AT due to higher load-bearing capacity of SiC filler. Therefore, SC10SG20AT can be recommended for lightweight applications.
Provable security against generic attacks on stream ciphers
Authors: Moch Alexander
Published: June 2023

Recent lightweight hardware-based stream cipher designs keep an external non-volatile internal state that is not part of the cipher’s hardware module. The purpose of these so-called small-state ciphers is to keep the size of the hardware and the power consumption low. We propose a random oracle model for stream ciphers. This will allow us to analyse the recent small-state stream cipher designs’ resistance against generic attacks and, in particular, time-memory-data tradeoff attacks. We analyse the conventional construction underlying stream ciphers like Grain and Trivium, constructions continuously using the external non-volatile secret key during keystream generation like Sprout, Plantlet, Fruit, and Atom, constructions continuously using the external non-volatile IV, and constructions using a combination of the IV and the key like DRACO. We show the tightness of all bounds by first presenting the time-memory-data tradeoff attacks on the respective constructions, establishing the upper bound on security, and then presenting the proof of security to establish the lower bound on security. In this work, we extend the theoretical work done by Hamann et al. who introduced the DRACO stream cipher at FSE 2023. We use the same random oracle model as the aforementioned work and apply it to the earlier work by Hamann et al. presented at SAC 2019, which showed security for two of the four constructions we consider in this work. Our model is equivalent but allows for a much simpler proof of security. Furthermore, we provide a proof of security for stream ciphers continuously using the secret key during keystream generation, giving upper and lower bounds for all four generic stream cipher constructions proposed so far.
Numerical investigation of ice crystal melting characteristic and icing risk in an axial compressor
Authors: Jia Wei , Yang Bowen , Zheng Miao , Kong Qingguo
Published: June 2023

The ingestion of ice crystals in aero-engine will cause engine surge, flameout, thrust loss, and even in-flight shutdown in the extreme cases, which seriously endanger the flight safety. In order to quantitatively investigate the ice crystal melting characteristic in the compressor, a method based on the compressor mean line flow was developed and validated. Results showed that the wet-bulb temperature increases as the temperature offset increases. The increase in temperature offset or decrease in particle size result in earlier or faster melting of the ice crystals in the low-pressure compressor. The rate of increase in melting ratio decreases with the increase of ice water content at the descent condition. The ambient temperature and ice crystal property are both the important factors affecting the icing risk in the compressor. Higher ambient temperature, smaller particle size or higher ice water content can increase the icing risk in the low-pressure compressor.
The impact of the COVID-19 pandemic on cross-border shopping tourism: the case of Hungary
Authors: Tömöri Mihály , Staniscia Barbara
Published: June 2023

By today the smooth functioning of the global economy has been highly dependent on the uninterrupted flow of factors across borders. The free flow of tourists is also inevitable for the proper functioning of the global tourism industry. However, tourism and various forms of cross-border (tourism) activities were put under unprecedented pressure due to the COVID-19 pandemic, since most countries, including Hungary, introduced serious restrictions on mobility to slow down the spread of the virus. This paper focuses on a relatively under-researched topic, cross-border shopping tourism in the context of the COVID-19 pandemic. Before the outbreak of the pandemic, shopping tourism was deemed to be an increasingly important component of the tourism value chain. Several studies have demonstrated that shopping has become one of the most favourable activities among tourists and one of the major categories of tourists’ expenditure. Based on the review of the relevant literature, the paper introduces the notion and forms of shopping tourism and discusses the major research topics with special regard to the effects of the pandemic and other types of crisis events. The impact of the pandemic on shopping tourism is observed through the example of Hungary, whereby the effects of restrictions, exchange rate fluctuations, and price-level differences on the number of in- and outbound shopping trips, and the related expenditures, are evaluated. Results show that re-bordering processes due to the pandemic have not only resulted in an unprecedented decline in cross-border shopping tourism, but they also contributed to the spatial restructuring of shopping (tourism) and retailing. The pandemic not only sustained cross-border differentials vital to shopping tourism but sometimes even created new forms of them; these differences, however, could not counter the negative effects of restricted international mobility. The paper aims to contribute to the literature on cross-border tourism by reviewing the effects and consequences of COVID-19 and related restrictions on shopping tourism.
Statističke analogije između potresa, mikropotresa u metalima i lavina u 1D Burridge-Knopoff modelu
Authors: Kuki András , Lipcsei Sándor , Gere István , Járai-Szabó Ferenc , Gergely Attila , Ugi Dávid , Ispánovity Péter Dusán , Dankházi Zoltán , Groma István , Néda Zoltán
Published: June 2023

Universalities and intriguing analogies in the statistics of avalanches are revealed for three physical systems defined on largely different length and energy scales. Earthquakes induced by tectonic scale dynamics, micro-scale level quakes observed from slipping crystallographic planes in metals and a one-dimensional, room-scale spring-block type Burridge-Knopoff model is studied from similar statistical viewpoints. The validity of the Gutenberg-Richter law for the probability density of the energies dissipated in the avalanches is proven for all three systems. By analysing data for three different seismic zones and performing acoustic detection for different Zn samples under deformation, universality for the involved scaling exponent is revealed. With proper parameter choices the 1D Burridge-Knopoff model is able to reproduce the same scaling law. The recurrence times of earthquakes and micro-quakes with magnitudes above a given threshold present again similar distributions and striking quantitative similarities. However, the 1D Burridge-Knopoff model cannot account for the correlations observed in such statistics.
Contracts in the field of providing medical services with the use of assisted reproductive technologies
Authors: Stefanyshyn N.M.
Published: June 2023

The proposed article is devoted to the study of contracts in the field of providing medical services with the use of assisted reproductive technologies. The author notes that the development of social relations affects all spheres of social life, and, at the same time, poses a number of problems that need to be solved. One of these fields, of course, is medicine. Today, medicine has reached such a level of development of medical technologies that allows, for the most part, every patient to receive high-quality medical service and achieve the set goal. People who, for various reasons, are deprived of the opportunity to have children can get a sense of parenthood through the use of assisted reproductive technologies (DRT).Covid-2019, the brutal war that began in Ukraine on February 24, 2022, the ongoing anti-terrorist operation that took place in our country since 2014, etc., lead to the deterioration of the environment and ecological security and do not make it impossible, but also contribute to the appearance of various diseases that worsen the state of human health, negatively affect the functioning of all systems of the human body, including the reproductive system, which is reflected in the low birth rate in Ukraine and the demographic situation in general. Therefore, the proposed topic should be investigated in its entirety based on moral and ethical and legal norms, applying knowledge of psychology, sociology and history.Having conducted a scientific study, the author comes to the conclusion that the most successful construction in the civil-law plane, which will regulate social relations for the provision of assisted reproductive technologies, is the construction of a civil-law contract. However, relations with the use of assisted reproductive technologies require proper civil law regulation at the state level, but it is necessary to take into account that such relations are of a special nature, which is related to the personal life of an individual and his natural rights, which are inviolable and inalienable - the right to motherhood and paternity, the right to life, the right to health care, which are guaranteed by the Basic Law of the State - the Constitution of Ukraine and the Universal Declaration of Human Rights.
Un estudio comparado del razonamiento proporcional de estudiantado costarricense y español en tareas de comparación de razones
Authors: Hernández-Solís Luis Armando , Batanero Carmen
Published: June 2023

[Objetivo] El objetivo del trabajo fue evaluar el nivel de razonamiento proporcional y estrategias en problemas de comparación de razones de estudiantado costarricense y español entre 11 y 16 años. [Metodología] Mediante un enfoque de investigación interpretativo, se propone a 704 estudiantes uno de dos cuestionarios con tres ítems sobre comparación de razones (en total seis niveles diferentes de razonamiento proporcional, según Noelting). Se presenta el porcentaje de respuestas correctas y niveles de razonamiento proporcional y el resultado de un análisis de contenido de las estrategias correctas e incorrectas. [Resultados] La mayoría de estudiantes responden correctamente a los problemas de menor nivel de razonamiento proporcional de Noelting (IA a IIA), disminuyendo esta proporción en los cursos 6º a 8º de Educación General Básica al aumentar el nivel de razonamiento proporcional del problema. Resultados similares se obtienen respecto a las estrategias correctas. Las estrategias incorrectas más frecuentes fueron la comparación de los primeros términos de las razones y las comparaciones aditivas. Prácticamente la totalidad de estudiantes alcanza los dos primeros niveles de razonamiento proporcional de Noelting, y conforme avanza el curso, una proporción mayor consigue los siguientes niveles de razonamiento, pero una cantidad pequeña de estudiantes, ni siquiera en el décimo curso de Educación Diversificada llega al nivel IIIA correspondiente a las operaciones formales. [Conclusiones] Se concluye la necesidad de reforzar en la enseñanza el razonamiento sobre comparación de razones, y tenerlo en cuenta en los temas matemáticos basados en este razonamiento.
Ultrasonic wave parameter changes during propagation through poplar and spruce reaction wood
Authors: Saadat-Nia Mohammad A. , Brancheriau Loic , Gallet Philippe , Enayati Ali Akbar , Pourtahmasi Kambiz , Honarvar Farhang
Published: June 2023

Ultrasonic tests were performed in the main directions at 300 kHz in poplar and spruce reaction wood and normal wood. The experiments were conducted on 2 x 2 x 10 cm3 specimens selected from the pith to the bark. The same phase velocity values were measured in poplar tension wood and normal wood. In compression wood, the phase velocity was lower in the longitudinal direction and higher in the transverse direction. The group velocity measured in the longitudinal direction in tension wood was greater than in normal wood, but lower values were obtained in compression wood in comparison to those obtained in normal wood. The results showed that wave attenuation cannot be significantly affected by the structural properties of reaction wood. A better wave energy transfer pathway (RMS voltage) was found in poplar and spruce reaction wood than in normal wood. Acoustic radiation in reaction wood of both species was lower than levels obtained in normal wood in all anisotropic directions. The results obtained when comparing reaction wood and normal wood of both species indicated that sound velocity decreased as moisture content increased, but the attenuation coefficients increased slightly.
Preparation and characterization of organic aerogels from a lignin – resourcinol – formaldehyde copolymer
Authors: Chen Feng , Xu Min , Wang Lijuan , Li Jian
Published: June 2023

Lignin can be used as a cheap natural raw material to prepare organic aerogels based upon gelation and supercritical drying in ethanol. The aerogels were prepared from a mixture of the raw materials with lignin (L), resorcinol (R), and formaldehyde (F), followed by a reaction catalyzed by NaOH(C). The effect of the preparation conditions, such as the LRF concentration, the mass ratio of LR to NaOH (LR/C), the mole ratio of LR to F (LR/F), and the gelation temperature, on the gelation ability and the bulk density were studied. The results showed that the density of LRF aerogels increased with increasing reactant concentration and catalyst content. The microstructure of the porous carbon aerogels was investigated by SEM and TEM. The specific surface area and pore size distribution of LRF and RF aerogels were studied by nitrogen adsorption-desorption analysis. The pore width of LRF aerogels ranged from 1 nm to 100 nm. Most of the pores were about 50 nm wide, as is typical for mesoporous materials.
Nanofiller reinforcement effects on the thermal, dynamic mechanical, and morphological behavior of HDPE/rice husk flour composites
Authors: Kord Behzad
Published: June 2023

Polymer nanocomposites reinforced with lower volume fractions of nanofiller have recently attracted steadily growing interest due to their peculiar and fascinating properties as well as their unique applications in commercial sectors. In this study, composites based on high density polyethylene and rice husk flour with different loading of nanoclay were fabricated in an internal mixer. The influence of nanofiller at four levels (0, 2, 4, and 6 per hundred compounds (phc)) on the thermal and rheological behavior was studied. The morphology of nanoclay was determined by X-ray diffraction (XRD), and the effect of morphology on the thermal and dynamic mechanical properties were considered. Results indicated that the crystallization temperature, crystallization enthalpy, and crystallinity level increased with increase of nanoclay up to 2 phc and then decreased. Also, the dynamic mechanical behavior of composites was improved by the addition of nanofiller. X-ray diffraction patterns (XRD) revealed that the nanocomposites formed were intercalated. Morphological findings showed that samples containing 2 phc of nanoclay had higher order of intercalation and better dispersion. It seems that the thermal and dynamic mechanical properties of the HDPE/rice husk flour composites were improved by increasing addition of coupling agent.
Role of some treatments on enhancing the eco-friendly utilization of lignocellulosic wastes in production of cement-fiber bricks
Authors: Basta Altaf H. , Sefain Magdy Z. , El-Rewainy Iman
Published: June 2023

Rice straw (RS) and sawdust (SD) were evaluated for the manufacturing of fiber-cement bricks. The utilization of these bio-wastes will contribute to the reduction of the environmental impact of waste disposal. Pre-treating the fiber wastes, mechanically and/or chemically, was carried out before mixing them with cement and the appropriate amount of water. This approach was done for trials to reduce the tendency of fibers to absorb water, and consequently overcome the side effects of exposing the fiber-bricks to humidity. Different chemical treating agents, based on organic and inorganic materials, were used, e.g., gelatin-hexamine mixture, sodium silicate, and linseed oil. The results obtained show that the investigated organic treatments, especially linseed oil, were effective to reduce the water retention value (WRV) of RS and SD by 60% and 65%, respectively. The treatment provided bricks with compressive strengths of 4.9 MPa and 5.4 MPa, respectively. According to the Engineering Encyclopedia of Building standards, these values are suitable for construction purposes. The bricks manufactured from linseed oil-treated fibers with cement and Nitobond AR may be suited for load-bearing walls, since the compressive strength reached is 7.8 to 8.6 MPa.
Precios de mercado y demanda de medicamentos esenciales en el distrito de Ate durante la pandemia del COVID-19
Authors: Saenz Herrera José Ángel , Arteaga Poma Zaida Anabel
Published: July 2023

Objetivo: Comprender la relación entre los precios de mercado y la variación de la cantidad demandada de los medicamentos esenciales durante la pandemia del COVID-19 en el distrito de Ate. Método: Se utilizó un enfoque cuantitativo, con alcance descriptivo y diseño no experimental. Con el propósito de recabar las percepciones de los químicos farmacéuticos en el distrito de Ate, con respecto al comportamiento de los precios y la cantidad demandada de medicamentos, se encuestó a 73 químicos farmacéuticos directamente relacionados con lo suscitado, y se presentaron cuadros estadísticos para su análisis e interpretación. Resultados: Los precios de mercado muestran una volatilidad notable generada a partir de la demanda de medicamentos por parte de los consumidores en el distrito de Ate. Conclusión: Los precios de mercado desempeñaron un rol significativo en la demanda de los medicamentos, específicamente como efecto de su valor monetario, libre mercado y comportamiento del propio consumidor.
Box-Behnken Experimental Design for Electrochemical Aptasensor Optimization on Screen Printed Carbon Electrode/Silica-Ceria
Authors: Zakiyyah Salma Nur , Eddy Diana Rakhmawaty , Firdaus Muhammad Lutfi , Subroto Toto , Hartati Yeni Wahyuni
Published: June 2023

This study aims to optimize the epithelial sodium channel (ENaC) electrochemical aptasensor with the Box-Behnken experimental design. ENaC is a protein that plays a role in sodium ion transport in several epithelial tissues and is associated with hypertension. The ENaC protein aptamer is held in place in the electrochemical aptasensor by a modified screen-printed carbon electrode (SPCE) of silica-ceria composite (SiO2-CeO2). The unique structure of a silica matrix with high biocompatibility can form composites through a hydrothermal process. The Box-Behnken (BBD) experimental design is an efficient optimization method of factors that affect the experiment at three levels. The FTIR results of the silica-ceria composites were 549.35 cm-1 (Ce-O), 1095.3 cm-1 (Si-O-Si), and 491.28 cm-1 (Si-O). Meanwhile, SPCE/silica-ceria characterized by differential pulse voltammetry (DPV) showed an increase in peak current [Fe(CN)6]3-/4- from 3.190 μA to 9.073 μA. Three experimental factors, aptamer concentration, streptavidin incubation time, and aptamer incubation time, were optimized with BBD and obtained at 0.5 μg.mL-1, 30 minutes, and 1 hour. The optimum conditions observed resulted in a selective current response for ENaC protein detection. The optimization results can be applied to aptamer-based ENaC protein detection in samples.
Synthesis of Iron Oxide (Fe2O3)-Xanthan Gum Nanoparticle Composites Its Potential as a Chemical Flooding Media in Enhanced Oil Recovery (EOR)
Authors: Sriwijaya Yong Richard , Ratri Paramita Jaya , Mayangsari Tirta Rona , Adharis Azis , Riswati Shabrina Sri
Published: June 2023

Increasing oil consumption in Indonesia encourages an improvement of production using chemical flooding of Enhanced Oil Recovery (EOR) technology. Chemical flooding is an injection method of materials based on polymer and nanoparticles such as α-Fe2O3-xanthan gum nanocomposite into the reservoir. In this study, α-Fe2O3 nanoparticles were synthesised and then blended to xanthan gum by sonochemical method through an ex-situ process. The α-Fe2O3-xanthan gum nanocomposite X-ray diffraction (XRD) shows that there are no additional peaks. Only the α-Fe2O3 and the xanthan gum peaks are detected with the crystallite size of around 16-20 nm. The particle size of α-Fe2O3-xanthan gum (1:1) nanocomposite as measured by Particle Size Analyzer (PSA) was 228.43 nm with the type of polydisperse. The functional group of the nanocomposite is a combination of the α-Fe2O3 and xanthan gum functional groups which shows there are no other compounds detected in IR spectra. The EOR test showed that xanthan gum had a significant effect on increasing the viscosity of the α-Fe2O3-xanthan gum nanofluid to 1.964 cP at a 1:2 composition. Based on these results, α-Fe2O3-xanthan gum nanofluid is the potential material used in the chemical flooding process in the reservoir.
Use of CoO/ZnAl2O4 Catalysts and Microwaved Assisted in Vanillin Synthesis
Authors: Birhi Damiana Nofita , Iftitah Elvina Dhiaul , Warsito Warsito
Published: June 2023

Vanillin is a main component in vanilla, which is widely used in the industrial world. Market demand for vanillin extract continues to increase, while the availability of vanilla pods is decreasing. To overcome this problem, research on the synthesis of vanillin continues to be carried out and develops every year. This research aims to examine the conversion level and selectivity of the catalyst as well as microwave radiation efficiency usage in vanillin synthesis. Catalyst CoO/ZnAl2O4 was synthesized from CoO and ZnAl2O4 using the impregnation method, then analyzed using FTIR, XRD, and SEM-EDX. Vanillin synthesis was conducted in two steps, incorporating microwave usage at 120oC, underwent 30 minutes to be completed then followed by oxidation around 10- and 15-minutes involving nitrobenzene also 1%, 4%, and 7% of catalysts CoO/ZnAl2O4. The result showed that during 10 and 15 minutes, the selectivity value and various yield percentages for each time variation and catalyst loading of vanillin had been successfully 100% converted. The best result was obtained using CoO/ZnAl2O4 with 4% catalyst loading for 15 minutes. The selectivity value and yield percentages were 67.78% and 7.5%. A one-step vanillin synthesis with conventional reflux could also be a comparison. The reactions were done at 130oC for 2 and 3 hours with 4% catalyst loading.
Status Epilepticus
Authors: Freedman Daniel A. , Roach E. Steve
Published: July 2023

Status epilepticus is a neurologic emergency defined as a seizure that lasts longer than 5 minutes. This is the most common neurologic emergency in children, and it is associated with significant morbidity and mortality. Initial seizure management focuses on stabilization of the patient, followed by medication to terminate the seizure. Benzodiazepines, levetiracetam, fosphenytoin, valproic acid and other antiseizure medications can effectively halt status epilepticus. There is a narrow but important differential diagnosis, including prolonged psychogenic nonepileptic seizure, status dystonicus, and nonconvulsive status epilepticus. Focused laboratory testing, neuroimaging, and electroencephalography can be useful in the evaluation of status epilepticus. Sequelae include focal neurologic deficits, cognitive impairment, and behavioral problems. Pediatricians play an important role in the early recognition and treatment of status epilepticus, thereby preventing the acute and chronic harm that can be associated with status epilepticus.
Estado de sitio de Elvira Hernández: notas sobre poesía y ciudadanía
Authors: Hernández O. Biviana
Published: June 2023

El presente artículo aborda los engranajes entre escritura y ciudadanía que plantea el poemario de Elvira Hernández, Estado de sitio. Para ello, considera los factores de orden sociocultural que acompañaron su producción, circulación y recepción crítica, en el contexto del estallido social de octubre 2019 en Chile, la coyuntura feminista y el actual proceso constituyente. Hitos de nuestra historia reciente frente a los cuales la poeta se posiciona ética y estéticamente desde una concepción política de la palabra como litigio, esto es, una disputa –discursiva y social– por la enunciación de (en) lo común.
Biliteracidad en la universidad para futuros traductores: percepciones y correlaciones
Authors: dos Santos Marques Ana Laura , Singer Contreras Nestor
Published: June 2023

El objetivo del presente trabajo es describir las percepciones de estudiantes y profesores de pregrado en traducción inglés-español-portugués acerca del desarrollo de la escritura académica en sus lenguas de formación. Para este propósito, se conceptualiza el término biliteracidad (Hornberger, 1990; 2003; 2013) relacionándolo con las características identificadas por los participantes con base en sus experiencias con la escritura de géneros académicos en su primera lengua (L1), el español, y en las lenguas adicionales (LA), portugués e inglés. El diseño metodológico se fundamenta en un estudio de caso en la primera etapa de un estudio longitudinal. Para este artículo, han sido seleccionados datos obtenidos en entrevistas semiestructuradas que buscaban explorar cuáles contenidos, en qué medios y cómo se conforman los contextos de escritura requeridos para la producción de significados en las referidas lenguas en la universidad. Las respuestas fueron clasificadas en dos categorías: contextos de escritura y el dominio de los géneros requerido por la universidad. Los resultados destacados revelan que los estudiantes transitan por contextos de biliteracidad inglésespañol-portugués, según los propósitos específicos de sus tareas con limitaciones para aproximar sus producciones al registro académico y correlacionar sus experiencias de escritura con sus lenguas de formación. En cuanto a los profesores, se constata la preocupación por la práctica de escritura vinculada con sus asignaturas en un abordaje esencialmente monolingüe. Se resaltan las implicaciones lingüísticas y pedagógicas acerca del desarrollo particular y compartido de las experiencias con la escritura académica tanto en las LA como en la L1 de los participantes.
Una nota sobre los nombres abstractos
Authors: Polakof Ana Clara
Published: June 2023

En esta nota, defenderemos que los nombres abstractos denotan lo abstracto si se encuentran en un sintagma determinante subespecificado. Argumentaremos que la ausencia de la frase clasificadora será la responsable de que denoten lo abstracto. Por lo tanto, será la estructura y no el nombre abstracto en sí mismo la que nos permitirá denotar lo abstracto. Argumentaremos, asimismo, que la ausencia de dicha frase se relaciona con el conocimiento del mundo. Como no podemos percibir lo abstracto, no podemos porcionarlo. Así, no tenemos una frase clasificadora y la estructura del sintagma determinante refleja, en cierto sentido, el conocimiento del mundo.
Die andere Seite des Praktikums: Die SUB Hamburg als Praktikumsbibliothek
Authors: Kuper Elisabeth
Published: June 2023

In diesem Artikel wird das Studien-Praktikum aus Sicht der Praktikumseinrichtung Staats- und Universitätsbibliothek Hamburg geschildert. Er bietet Einblick in die organisatorischen Abläufe und zeigt auf, welche Abteilungen, Praxiskenntnisse und Aufgaben Bachelorstudierende während ihres Praxissemesters kennenlernen.
Auf dem Weg zum Urban Knowledge Hub
Authors: Green Miriam , Herrle Isabel Rosa Marie
Published: June 2023

Im Auftrag der Behörde für Wissenschaft, Forschung, Gleichstellung und Bezirke (BWFGB) startete der Landesbetrieb Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky (SUB) im August 2020 das Raumentwicklungsprojekt „Wissen Bauen 2025“. Ausgehend von der Frage, wie große wissenschaftliche Bibliotheken mit der Bedeutung der SUB räumlich aufgestellt sein müssen, um ihre Aufgaben unter den Vorzeichen der digitalen Transformation zukünftig erfüllen zu können, wurde die SUB als Wissensraum und Lernwelt neu betrachtet. Das Projekt war als Prozess Offener Gesellschaftlicher Innovation organisiert. In einem breiten Dialog mit Nutzer*innen, Stakeholdern, Mitarbeiter*innen und Expert*innen aus Wissenschaft, Kultur, Bildung, Stadtgesellschaft und Bibliotheken wurden über drei Stufen hinweg Bedürfnisse und Erwartungen aufgenommen, weiterentwickelt und daraus ein fachlich unterlegtes Raumkonzept inklusive Raumprogramm und Funktionsschema erarbeitet. Dabei wurden die Grenzen zwischen den einzelnen Gruppen bewusst offen gehalten, um Perspektivwechsel und kreativen Austausch zu ermöglichen.
The Library of the Norwegian University of Science and Technology (NTNU) and its work with Open Science
Authors: Gastinger Almuth
Published: June 2023

The article describes the library of the Norwegian University of Science and Technology and its work with Open Science. It gives a brief overview over the university and the library and presents the new organisational structure of the library. Afterwards, important strategy documents and guidelines for Open Science, Open Access, and Research Data Management at NTNU are introduced and the practical work with it is described. In the end, a selection of other projects and focus areas are mentioned.
“Criar como si no trabajáramos y trabajar como si no tuviéramos hijos”, reflexiones sobre la integración laboral de las madres migrantes que crían en Chile
Authors: Castillo Lucia Odette
Published: June 2023

A la par de sus saberes y experiencias, las prácticas de crianza de las madres migrantes son influenciadas por la precariedad de sus espacios de subsistencia. Desde los supuestos teóricos de la interseccionalidad, referentes a las redes conformadas por el género, la etnia-raza y la clase, que establecen relaciones de desigualdad entre las superestructuras sociales y las madres-migrantes, se plantea responder al objetivo general de analizar la influencia de la precarización laboral de las madres migrantes en la crianza de sus hijos e hijas en Chile. Desde una perspectiva latinoamericana, se aspira a aperturar la discusión relativa a un fenómeno local como manifestación de un saber situado y, a su vez, a visibilizar la discriminación, la subordinación y el sometimiento de las mujeres madres migrantes, lo cual explica la desestimación general de su integración al país donde la crianza de su progenie tiene lugar. Por medio de una metodología cualitativa basada en el interaccionismo simbólico, se realizaron 39 entrevistas semiestructuradas a madres migrantes venezolanas, peruanas y haitianas; luego, los datos fueron sometidos a un análisis temático y teorizados según los objetivos de investigación definidos. Como resultados se obtuvo que las madres migrantes tienden a acceder a empleos precarizados e informales frente a los que despliegan distintas estrategias, desde el abandono laboral, la renuncia a sus derechos de maternidad, hasta la aceptación de la doble presencia y la conformación de cadenas globales de cuidado para compatibilizar la crianza con el trabajo. Las conclusiones exponen que la integración laboral de las madres migrantes en Chile dibuja prácticas de crianza a partir de una negociación permanente entre la subsistencia y la mantención de los vínculos y los acervos culturales, así, las dimensiones de género, raza y clase perfilan la intensidad de estas transacciones que manifiestan la ubicación social de subalternidad de las madres migrantes, intensificada en el caso de las madres haitianas, por cuanto en ellas se corporiza la mayor representación de otredad.
Desigualdad de género y paternidad adolescente en dos comunidades indígenas de Chiapas, México
Authors: Vázquez-Solís Ezequiel , Nazar-Beutelspacher Austreberta , Ramírez-López Dulce Karol , Salvatierra-Izaba Ernesto Benito , Estrada-Lugo Erín Ingrid Jane
Published: June 2023

Introducción: La paternidad adolescente ha sido considerada un importante problema social que recientemente ha empezado a estudiarse desde la construcción sociocultural de las masculinidades y la desigualdad de género. Este trabajo contribuye a documentar la experiencia de la paternidad adolescente en las comunidades rurales indígenas Ch’oles y Tseltales del estado de Chiapas, México. Metodología: El estudio fue realizado a través de un enfoque cualitativo, la técnica de acopio de información consistió en entrevistas semiestructuradas y la selección de las personas participantes fue mediante la técnica de bola de nieve lineal. Se completó un total de 25 entrevistas. En específico, se entrevistó a 16 personas menores de 20 años que fueron padres o madres en la adolescencia; a cinco varones de 24 a 40 años; y a cuatro varones de 50 años o más. Resultados: La paternidad adolescente se asocia con la construcción de las masculinidades soportada en normas socioculturales tradicionales, como el pago por la novia, la poliginia y el intercambio de mujeres. El embarazo adolescente se asocia con la importancia de la paternidad para los hombres, pese a la resistencia de las mujeres a unirse y embarazarse tempranamente. Conclusiones: Diversas condiciones facilitan la ocurrencia de la paternidad adolescente no como un fenómeno individual, aislado, sino en el contexto de la producción (económica) de las estructuras familiares y de la subordinación de las mujeres, el cual se ha mantenido más allá de algunos cambios generacionales.
Religious value-based strategy model on steel construction businesses performance
Authors: Nugraha Sukma , Rahayu Agus , Disman Disman , Wibowo Lili Adi , Tawami Tatan
Published: July 2023

While the importance of implementing value-based strategies has been widely researched, empirical research on applying such strategies to create a religious atmosphere that can improve workers’ performance in companies is limited. Therefore, this study aims to generate a Value-Based Strategy Model for creating a religious atmosphere and examine its influence on steel construction businesses' performance in Indonesia. The model is based on the concept of religious-based values, which provide a competitive advantage for companies by affecting the performance of workers and the overall company performance. The population for this study was 120 steel construction companies in Indonesia, and the SEM-PLS technique was used for analysis. The findings demonstrate that a value-based strategy that creates a religious atmosphere significantly and positively affects the business performance of steel construction companies in Indonesia.
PENGARUH MODUL KESETIMBANGAN KIMIA BERBASIS INKUIRI TERSTRUKTUR DENGAN TIGA LEVEL REPRESENTASI TERHADAP MODEL MENTAL SISWA
Authors: Nurhasanah Nurhasanah , Azhar Minda , Alizar Alizar
Published: June 2023

Students find it difficult to understand the material of chemical equilibrium. One of the efforts to overcome these student difficulties is to use a structured inquiry-based module equipped with three levels of representation. This study aims to determine the effect of using the module on students' mental models. This study used a posttest-only control design conducted in two schools. In the design, each school had two groups, namely the experimental group and the control group. The two-tier diagnostic test instrument was used to test the mental models of 134 students. The hypothesis was tested by ttest using the SPSS 16.0 program. The results of the ttest for each school were 0.011 at SMAN 3 Padang and 0.008 at SMAN 13 Padang, with a 0.05 significance level. The results of the t-test showed that the use of the module affected students' mental models.
PENERAPAN MODEL PEMBELAJARAN PROJECT BASED LEARNING (PJBL) PADA PEMBUATAN KOLOID UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS DAN KEMANDIRIAN BELAJAR SISWA
Authors: Desiana Gita Annissa , Sulastri Sulastri , Syahrial Syahrial
Published: June 2023

Critical Thinking Skills (CTS) and student learning independence are two things related to the learning process. The low independence of student learning affects critical thinking skills in solving a learning problem. A project-based learning model can improve critical thinking skills and independent learning. This study aims to analyze the application of the PjBL model to manufacture colloids to improve students' critical thinking skills and independent learning at MAN 1 Banda Aceh. The type of research used is quasi experimental. The samples of this study were students of natural science two 11th grade as control class and students of natural science four 11th grade as experimental class, which had normal distribution and had the same variance. The instruments of this research are the CTS test questions and learning independence questionnaires. The results show that applying the PjBL model can improve critical thinking skills (CTS) with an average N-gain value in the medium category, then the CBC analysis of indicators is in the high category. The results of testing the CTS hypothesis for experimental class and control class students are also significantly different, meaning that the CTS model can improve students' critical thinking skills. The analysis of student learning independence results obtained an average score of N-gain, including the medium category. The results of the hypothesis test of student learning independence in the experimental and control classes are also significantly different, meaning that the PjBL model can increase learning independence. The results obtained prove that the PjBL model can improve CTS and learning independence better than in the control class.
Development of E-module Application Smartphone with Socioscientific Issue (SSI) in Biofuels
Authors: Rohayu Erny , Louise Isana Supiah Yosephine
Published: June 2023

This research is motivated by the lack of ability of chemistry teachers to prepare online learning media that requires students to achieve 4.0 technological developments. This research aims to create a valid and practical socio-scientific issue-based learning media. The development of this socioscientific-based e-module is carried out by applying the ADDIE (analysis, design, development, implementation and evaluation) development model. The data collection technique used in product validation is the questionnaire method. Theoretical validation in this study was carried out by expert lecturers, chemistry teachers, and peer reviewers. The validation of expert lecturers is described descriptively to the criticisms and suggestions given. Based on the validation result of the chemistry teachers and peer reviewers, respectively 88.8% and 87.9%, it was stated that the electronic module (e-module) was very eligible. The practicality of the e-module is known from the results of the student response questionnaire, which was a very eligible category. Based on the overall assessment results, the e-module product is feasible to be implemented in chemistry learning.
Development of Google Sites-based Multiple Representations Learning Media on Benzene and Its Derivatives Topic
Authors: Wiguna Muhammad Anarda , Zamhari Muhammad
Published: June 2023

COVID-19 pandemic accelerated the transformation of education and forced the digitalization of education to create effective learning. The understanding of complex chemical structures and reactions holds great significance in the realm of chemistry education. Benzene and its derivatives are particularly challenging topics that require a robust representation approach. The research aims to develop and assess the feasibility of Google Sites-based multiple representations learning media on benzene and its derivatives material. The research utilized the Research and Development (R&D) approach, adhering to the ADDIE (analysis, design, development, implementation, and evaluation) development model. The research was carried out until the development stage. The developed learning media effectively integrated three levels of chemical representation for benzene and its derivatives, utilizing various features such as text, animation, video, 3D molecular simulation, and images. The validation conducted by content and media experts indicated that the learning media is valid with scores of 95.8% and 92.5%, respectively, with excellent category. Furthermore, the product quality assessment conducted by experts and students' responses showed that media could be used practically, with percentages of 95% and 95% as excellent categories. These findings confirm the suitability of the developed learning media for facilitating students' understanding of benzene and its derivatives during the learning process.
Teologia em (per)versões: sentidos e sujeitos à margem do cristianismo
Authors: Costa Dilermando Moraes
Published: June 2023

Este artigo apresenta como tema a constituição de uma teologia indecente (queer) e objetiva refletir quanto às condições de produção que possibilitaram a emergência de uma perspectiva indecente nos estudos teológicos cristãos na segunda metade do século XX. Como objetivos específicos, buscamos: a) discutir a (per)versão dos sentidos; b) apresentar a constituição da teologia cristã enquanto saber racional e relacional acerca de Deus e dos humanos; e c) debater a proposta de uma teologia indecente como oposição aos processos de exclusão das diversidades sexual e de gênero do cristianismo. Teoricamente, recorremos à Análise de Discurso, à Teologia da Libertação, à Teologia Feminista e à Teologia Queer para a fundamentação deste trabalho.