bluuebunny/crossref_metadata_2025 huggingface dataset:
Epidemiological, Clinical characteristics and Drug resistance situation of Culture-confirmed Children TBM in Southwest of China: A 6-Year Retrospective Study
Authors: Wang meidong , Liao Yi , Li Feng-Qing , Zhu Ma , Wu Hui-Gui , XU Hong-Yuan , Luo Jia , Li Jie-Ying , Zhong Jing
Published: May 2019

Background: There are little data on the disease in children. This study aimed to analyze the epidemiological, clinical characteristics and drug resistance situation of culture-confirmed children TBM in Southwest of China，and hope this study will provide some recommendations to readers in clinical or related fields.
Methods: We performed a retrospective study including children <14 years of age with cerebrospinal fluid (CSF) culture-confirmed TBM between January 2013 and December 2018 at Public Health Clinical Center of Chengdu (PHCCC). Nontuberculosis Mycobacteria (NTM) were excluded. Mycobacterium tuberculosis (MTB) drug sensitivity testing (DST) was performed using the MicroDSTTM method. The age, gender, family history of tuberculosis, status of Bacillus Calmette–Guérin (BCG) vaccination, residential areas information, clinical, laboratory and radiological features were recorded. Data were analyzed using SPSS Statistics Client 19.0, and the change in drug resistance rate was analyzed using the chi-square (2) test.
Results: From 3467 probable TBM patients recruited, 295 cases were Mycobacterial culture-positive, the positive rate of 8.5 per 100 patients, included 253 adults and 42 children. We included all the 42 children <14 years of age for this study, the median age was 9 years, sex distribution was equal, of which 1/42 (2.38%) died. The geographical distribution of children's TBM in southwest of China is mainly concentrated in the minority areas of western Sichuan. Thirty-four (81.0%) children TBM patients is the population of China's ethnic minorities, only 2/42 (4.76%) had BCG vaccination histories. All the 42 patients had varying degrees of Chest X-rays changes and 18/42(42.9%) merger of extracranial TB. Fever and headache are the most common presenting symptom. Thirty-five (83.3%) with neck stiffness and 30/42(71.4%) with high CSF pressure. DST results showed that the resistance rate was high, to any anti-tuberculosis drug (ATD) resistance was 18 (42.9%), to multidrug-resistant tuberculosis (MDR-TB) and pre-XDR rate were 1 (2.4%) respectively.
Conclusions: TBM in Children in Southwest China were mainly concentrated in the minority areas of western Sichuan, presents with nonspecific clinical features and all with positive chest X-ray findings. High rates of drug resistance were founded. More than 95% of patients were lack of BCG vaccination at birth.
Chromophore Assisted Retinal Break Detection To Manage Challenging Situations In Retinal Detachment Redo Surgery
Authors: Berarducci Antonio , Colasante Martina , Laborante Antonio
Published: May 2019

BACKGROUND: The purpose of this case series is to demonstrate that subretinal blue dye injection, with and without 180 degree endolaser retinopexy, can be considered a useful tool in finding occult rhegmatogenous retinal breaks in eyes with recurrent retinal detachment.
CASE PRESENTATION: Three patients with recurrent retinal detachment were treated between January and March 2018. In all cases the intraoperative internal search did not demonstrate any obvious break or hole. Membraneblu-dual (Trypan Blue 0,15% + Brilliant Blu G 0,025% + 4% PEG) was then injected into the subretinal space using a 41 Gauge cannula. The eye was rotated such that the dye was pushed through a tiny break which was causing the retinal detachment. A 180 degree laser retinopexy was performed on a single eye. After silicon oil removals and absorption of the gas tamponade respectively, retinas remained attached at three months follow up.
CONCLUSIONS: Chromophore assisted occult retinal break detection can be considered a useful and safe surgical technique in managing some unexpected and challenging intraoperative situations.
Keywords: chromophore, subretinal, occult, retinal, detachment
Evaluation of Drug Resistance from Sputum Specimens of Suspected Tuberculosis Patients attending a District Hospital, Abuja
Authors: Anzaku Abbas Abel
Published: May 2019

Background: This study evaluated the prevalence of drug resistant tuberculosis infection among suspected tuberculosis patients attending Asokoro District Hospital (ADH), Abuja, Nigeria. Methods: A total of 301 AFB+/- sputum specimens from suspected TB patients were collected for the study following study approval from Asokoro District Hospital Ethic Committee. Eighty-nine (89) identified Mycobacterium tuberculosis complex were isolated after morphological and biochemical testing. Sputum specimens collected from the patients were processed, cultured on Lowenstein-Jensen (LJ) media and subjected to in-vitro antimicrobial susceptibility testing. The eighty-nine (89) identified M. tuberculosis complex isolates were challenged with Rifampicin (RIF), Isoniazid (INH), Ethambutol (EMB) and Streptomycin (SM) drugs respectively. Results: Out of the total 89 samples analyzed, 13 (14.6%) showed resistance to the first-line drugs while 76 (85.4%) were susceptible. Drug resistance was identified in 10 (11.8%) of the new tuberculosis case (primary drug resistance cases) and 3 (75%) in re-treatment cases (secondary or acquired resistance). Prevalence of mono-resistant, double resistant and triple resistant patterns were 5 (5.7%), 6 (6.7%) and 2 (2.2%) respectively. Multi-drug resistant (resistant to both RIF and INH, the two most potent anti-tuberculosis drugs, with or without resistant to other drugs) was 1.1%. No isolate was resistant to all the four drugs. Conclusion: Drug resistance were observed in the cultures of M. tuberculosis complex, however no isolate showed resistance to all the four first-line drugs used. This study therefore recommends strict adherent to medication for tuberculosis patients as poor compliance or inappropriate use of drugs could induce resistance.
Keywords: Drug resistance, M. tuberculosis complex, antimicrobial susceptibility, Abuja, sputum, first-line drugs.
The effect of IFRS adoption on the value relevance of accounting information: evidence from South Korea
Authors: Hoon Ki Do , Bin Leem Wook , Hoon Yuk Jee
Published: May 2019

This study investigates whether the value relevance of accounting information was changed after IFRS adoption in South Korea. Related prior studies have found mixed empirical evidence depending on research methodologies or research periods. Moreover, the effect of IFRS adoption on value relevance can be different between Korean stock markets (KSE and KOSDAQ) because they have different characteristics. Also, the main financial statements reported by Korean firms had changed from individual financial statements to consolidated financial statements after IFRS adoption. Thus, this study analyzes the effect of IFRS adoption on the value relevance of individual and consolidated accounting numbers expanding research periods (5 years before and after IFRS adoption) and comparing changes in explanatory powers of Ohlson (1995) model on each listing market. The empirical results indicate that the value relevance of Korean listed firms generally decreased after IFRS adoption. However, the value relevance of KSE listed firms decreased, while the value relevance of KOSDAQ listed firms increased after IFRS adoption. In addition, it was found that the effects of IFRS adoption on value relevance of individual and consolidated financial information were different depending on listed markets. This implies that different level of demand for information environment may induce differential effects of IFRS adoption on value relevance.
Optimizing the dynamic response of pressure reducing valves to transients in water networks
Authors: Zaki Khaled , Imam Yehya , El-Ansary Amgad
Published: May 2019

Pressure reducing valves (PRVs) are typically used to regulate excessive pressure in water distribution networks. During transient events, the dynamic response of PRVs may adversely affect pressure fluctuations in distribution networks. In this study, the dynamic response of PRVs was analyzed by developing a numerical model that coupled an existing water-hammer model and a two-parameter dynamic PRV model. PRV parameters were calibrated, and the model was validated using previous experimental observations. The model was then used to study the effect of PRV dynamics during transient events in a distribution network. To optimize the rate of PRV opening and closure and control its dynamic response, the model was interfaced with an optimization algorithm based on shuffled complex evolution. The applied objective function gave PRV parameters that accelerated damping of the transient pressure waves and minimized the root-mean-square deviation from post-transient steady pressure at all nodes in the network. The results of this study indicate the importance of accounting for PRV response when simulating transients in water distribution networks. This study also highlights the need for PRV manufacturers to include in their product catalogs dynamic PRV parameters for use in transient analysis.
Possibilities and prospects of hypothermia in the treatment of ischemic stroke
Authors: Fartakov E. , Tarkova A. , Kretov E. , Lomivorotov V. , Zykov I.
Published: May 2019

Today the Russian Federation has one of the worst indicators in the world in terms of morbidity and mortality from stroke. Currently, two methods are used to treat ischemic stroke: thrombolysis and thrombextraction. However, despite their effectiveness, the methods have limited use due to the presence of strict indications and contraindications. In this regard, the search for new methods of treating ischemic stroke, which can be effective both with independent use and as an addition to already existing methods, is an urgent task. The purpose of this paper is to review research studies on the use of hypothermia in ischemic stroke. Hypothermia has a proven neuroprotective effect in cerebral ischemia. In this context, interest is the method of intracarotid selective cerebral hypothermia, which, according to a number of preclinical studies, significantly reduces the volume of cerebral infarction after ischemic stroke. The advantage of this method is the rapid achievement of the target temperature, a targeted effect on the brain and a minimal effect on the system temperature. Thus, intracarotid selective cerebral hypothermia is a very promising method for the treatment of ischemic stroke and deserves further study. In this regard, the authors decided to conduct a preclinical study on this subject.
Received 9 October 2018. Revised 25 January 2019. Accepted 30 January 2019. Published online 11 March 2019.
Funding: The work was funded by the Russian Foundation for Basic Research (grant No. 18-415-540025).
Conflict of interest: Authors declare no conflict of interest.
ORCID IDE.I. Fartakov, https://orcid.org/0000-0002-1847-7291A.R. Tarkova, http://orcid.org/0000-0002-4291-6047E.I. Kretov, http://orcid.org/0000-0002-7109-9074V.V. Lomivorotov, https://orcid.org/0000-0001-8591-6461I.S. Zykov, http://orcid.org/0000-0001-6253-9026
Pulmonary Hypertension: A Common Complication of Left Heart Disease
Authors: Champion Hunter C.
Published: May 2019

Pulmonary hypertension (PH) commonly results as a complication of left heart failure (systolic or nonsystolic dysfunction). It is important to note that there is a distinct difference between PH as a whole and pulmonary arterial hypertension (PAH), which have the same criteria with regard to mean pulmonary artery pressure (mPAP) as PAH with the critical difference of the pulmonary capillary wedge pressure (PCWP) measurement. Table 1 shows the most common causes of RV dysfunction. The issue of management of right ventricular (RV) failure has recently become more important with increased awareness of RV failure symptoms in the setting of PH. Moreover, with growing consideration for surgical left ventricular support (left ventricular assist device, LVAD) and the need for RV functional competence, the need to better understand the role of RV function is becoming more paramount.
Oral Therapies for PAH: State-of-the-Art and Investigational Approaches
Authors: Beutz Michelle A. , Bull Todd M. , Badesch David B.
Published: May 2019

The development of intravenous epoprostenol was an exciting advance in treating pulmonary arterial hypertension, offering patients improved functional capacity and prolonged survival. However, this form of therapy is complicated, requiring an indwelling central venous catheter, with attendant risks of infection, thrombosis, and dislodgement. The desire to simplify therapy and improve safety has led to a variety of oral agents, generally classified as endothelin receptor antagonists and phosphodiesterase inhibitors. An oral prostanoid is also under development.
Potential Roles of Siglecs in the Regulation of Allo-Immune Reaction
Authors: Cai Songjie , Zhao Jing , Ueno Takuya , Chandraker Anil
Published: May 2019

Siglecs are mammalian sialic acid (Sia) recognizing immuno-globulin-like receptors expressed
across the major leukocyte lineages, and function to recognize ubiquitous Sia epitopes on the
cell surface. Many Siglecs are inhibitory receptors expressed on innate immune cells, they also have a
role in maintaining B cell tolerance as well as modulating the activation of conventional and plasmocytic
dendritic cells. Through these and other roles they contribute directly and indirectly to the regulation
of T cell function. Siglecs have been identified to play key roles in several forms of blood cancers,
autoimmune and infection deceases. So far as we know, there’s no Siglecs related research works on
solid organ transplantation. In this review, we describe our understanding of the potential roles of
Siglecs in the regulation of immune cell function, which may be crosslinked to allo-rejection and
ischemia-reperfusion injury.
Electrochemical Detection of ct-dsDNA on Nanomaterial-modified Carbon Based Electrodes
Authors: Bozal-Palabiyik Burcin , Dogan-Topal Burcu , Moghaddam Abdolmajid Bayandori , Ozkan Sibel A. , Kazemzad Mahmood , Uslu Bengi
Published: May 2019

Background:

Nanomaterials have a significant role in improving the performance of electrochemical
sensing systems. Unique physical and chemical properties have extended the application of
nanomaterials in the fields of engineering, materials and biomedical science. In the last few years, these
materials with unique properties have been preferred in the design of experimental approaches for the
analysis of metal ions, proteins, biomarkers and pharmaceutical compounds. This paper reports preparation,
characterization of two different nanomaterials and their electrochemical application on doublestranded
calf-thymus DNA signals.

Methods:

The multi-walled carbon nanotubes were functionalized with amine groups (MWCNTs-NH2)
by employing the dielectric barrier discharge plasma treatment and then applied as MWCNTs-
NH2/glassy carbon electrode. Moreover, the synthesized mesoporous silica MCM-41 was chemically
amine functionalized and used as MCM-41-NH2/carbon paste electrode. For biosensor preparation, a
thin layer of calf thymus double stranded deoxyribonucleic acid (ct-dsDNA) was immobilized over the
modified electrodes.

Results:

The influence of dsDNA immobilized substrate was investigated based on the electrochemical
signals. While dsDNA/MCM-41-NH2/carbon paste biosensor showed a selective effect for guanine
signals, the dsDNA/MWCNTs-NH2/glassy carbon biosensor presented electrocatalytic effect for dsDNA
signals. Both dsDNA modified electrodes were employed to explore the interaction between the
dsDNA and the anticancer drug etoposide (ETP) in aqueous solution through voltammetric techniques.
By increasing the interaction time with ETP, the adenine peak current was quenched in the presence of
MWCNTs-NH2 based glassy carbon electrode. Whereas, in the presence of MCM-41-NH2 based CP
electrode, selective interaction with guanine occurred and oxidation peak intensity was diminished.

Conclusion:

The selective effect of MCM-41-NH2 can be used when the studied substances give a signal
with the same potential of adenine.
APPLICATION OF OBLIQUE IONOSPHERIC SOUNDING TO INCREASE THE ACCURACY CHARACTERISTICS OF THE OVER-THE-HORIZON RADAR
Authors: Vlasov Yu. M. , Glinkin I. A. , Litvinov S. V.
Published: May 2019

The over-the-horizon radar stations of the space wave are sensitive to changes in the ionosphere. For the accurate operation of such radars, it is necessary to have up-to-date information on the ionosphere at the reflection point of radio waves. The article gives an example of the implementation of a network of ionospheric stations working in the interests of the FG of the radar station with the example of the Australian system JORN. It is proposed to use the Russian vertical ionosondes Parus-A for ionospheric support of the radar. These ionosondes are also capable of performing oblique sounding at distances up to 2000 km. The results of oblique sounding by these ionosondes are shown on various routes on the territory of Russia: in the European part of the country, in Siberia and in the Far East. The features are explained and the analysis of the data is carried out. It is concluded that the problem is topical and that it can be solved. The potential is shown in the ionosonde Parus-A at the development stage and implemented later.
EFFICIENCY OF MOTION CONTROL OF SPACE SENSOR PHOTOGRAPHING LOW ORBITAL SPACE OBJECTS
Authors: Vakhitov E. N. , Lagutkin V. N. , Lukyanov A. P.
Published: May 2019

Principles of observations and design of onboard equipment for obtaining optical images of low-orbiting space objects during flight at crossed courses are considered. It is noted that photographing from the distance of about 50 km allows to obtain images of space objects with linear resolution of about 1 dm. Simulation model of observation process by satellites-photographers was developed for the modes of their passive and controlled movement. The statistics of observability by one and two satellitesphotographers of low-orbiting space objects are calculated: dynamics of growth of the number of observed objects from distances of 30 and 50 km during one-year observation cycle, and the difference in dynamics in the modes of passive and controlled movement. An algorithm of controlling the motion of satellite-photographer for increasing productivity of obtaining photographs is proposed and described. The simulation of this algorithm has shown that control of the movement of satellite-photographer with reserve of characteristic velocity of 100 m/s provides significant increase in the number of photographed low-orbiting space objects. At distances to the object not exceeding 50 km the effectiveness of observations due to control increases from 80 to 98%, and the proportion of rendezvous from distance of 30 km will be 93%.
THE IDEA OF APPLICATION THE DEGREE OF A CONTINUOUS MAPPING FOR EARTHQUACKE PREDICTION
Authors: Glivenko E. V. , Fomochkina A. S. , Prokhorova T. V.
Published: May 2019

The paper describes the possibility of constructing continuous mappings and calculating the degree of mapping with reference to the prediction earthquakes. At the beginning of the article, a definition of the degree of mapping is given. Then several approaches to the construction of possible vector fields are described. It is assumed that the fixed point of these vector fields will be destructive earthquake. In the first approach, the vector fields under consideration describe the geological behavior of the Earth, namely its motion and the plane of discontinuity in the epicenters of earthquakes. In the second approach fields connect foreshocks that are earthquakes that precede the destructive event. At the end of the article, examples of the successful and unsuccessful application of second approach are given. The study based on data from catalog of the NEIC (National Earthquake Information Center).
USE OF MULTIPROCESSOR COMPUTING PLATFORM WITH HETEROGENEOUS ARCHITECTURE FOR SOLVING THE PROBLEMS OF HYDROACOUSTICS AND RADIOLOCATION
Authors: Baranov L. D. , Lobanov V. N. , Cheldiev M. I.
Published: May 2019

One of the main directions to increasing efficiency of computing systems related with making of heterogeneous platform which allow more effectively to use computing resources of conventional processors, graphics processing units and coprocessors based on FPGA for performance of massively-parallel computing oriented tasks. The creation of task-oriented solutions, allowing the user to configure computing technique for solving specific application tasks and giving a chance to quickly and with a low cost to reconfigure the system to another type of task is an actual problem. The domestic computing platform that can simultaneously use modules with different architectures in different configurations to solve a common problem is described in the article. The description and results of the simulation software aimed at solving problems in the field of hydroacoustics and radiolocation in order to implement the joint interaction of computing resources of different architecture and to assess the prospects of further application of the platform in resource-intensive applications are presented in the article.
METHOD OF DIFFERENTIAL CORRECTION OF THE NAVIGATIONAL FIELD OF SHORT-RANGE NAVIGATION AND LANDING SYSTEMS WITH USE GLONASS
Authors: Baburov V. I. , Ivantsevich N. V. , Sauta O. I.
Published: May 2019

The effective requirements of the International Civil Aviation Organization (ICAO) for accuracy and reliability of aircraft (AC) positioning, especially in case of flights in the airfield area, make it particularly relevant to harmonize the accuracy characteristics of various radio systems so that any of them can be utilized during the flight. AC positioning accuracy amounts to several metres for standard GNSS modes or several centimetres for differential modes. At the same time, positioning errors for traditional short-range navigation and landing systems (VOR/DME, SHORAN or ILS), especially away from land-based radio beacons, are much higher than GNSS errors and may reach dozens, even hundreds of metres. The inferior accuracy of traditional navigation and landing systems is commonly associated with radio signal reflections from stationary land-based objects and with changes in terrain characteristics along the radio wave path. The paper presents a technique for improving radio navigation field accuracy for short-range navigation and landing on the basis of philosophy of differential correction and GLONASS technologies. The offered method of shaping of matrix of errors of navigational field of systems for short-range navigation and landing is illustrated on example of correction the abnormal error of the instrumental landing system (ILS).
AUTONOMOUS HEAT SUPPORT SYSTEM OF ELECTRONIC BLOCKS OF SPACE APPLIANCES
Authors: Gorbunov A. V. , Zhukov Yu. A. , Korotkov E. V. , Lekanov A. V. , Porpylev V. G. , Slobodzyan N. S.
Published: May 2019

The vast majority of electronic devices on-Board Russian spacecraft is placed on a temperature-controlled mounting surface is ON, however, in some tasks there is a necessity to place a separate electronic units out thermostated panels on remote spacecraft design. The article presents an autonomous system of providing thermal regime of electronic blocks of spacecraft and objects of space technology that require maintaining the operating temperature and are unable to be installed on the thermostatic landing surfaces of spacecraft. The proposed autonomous system of providing thermal regime can operate autonomously in the extended operating temperature range of the installation surface from -80 to +80 °C when the supply voltage changes in the range from 75 to 550% of the nominal value. The review of the existing solutions is presented, the substantiation of the proposed decision is given, the structural scheme of autonomous system of providing thermal regime is given and its description and an example of application is given.
COMPUTER AIDED DESIGN SYSTEM FOR SPACECRAFT ONBOARD NETWORKS
Authors: Olenev V. L. , Lavrovskaya I. Ya. , Kurbanov L. I. , Korobkov I. L. , Sheynin Yu. E.
Published: May 2019

Modern spacecraft onboard networks consist of a large number of nodes which interact with each other via a communication network. SpaceWire is a new generation technology which is being integrated into new spacecraft systems. In order to check network operation on the early stages of network design it is reasonable to perform its software simulation. The paper provides an analysis of existing simulation tools for the on-board and local area networks. We overview the main abilities of the existing software and then propose the computer-aided design (CAD) system for SpaceWire onboard networks design and simulation - SANDS. This software will solve important tasks, which spacecraft developers face with during implementation of satellites and other space vehicles. SANDS system will support the full on-board network design and simulation flow, which begins from the network topology automated generation and finishes with getting the network structure, configuration and parameters setting, simulation results and statistics.
Control of Rice Stem Borer Scirpophaga sp. Using Trichogramma sp.
Authors: Afifah Lutfi , Muhammad Bayfurqon Fawzy , Latifatus Siriyah Siti
Published: May 2019

This community services activity was conducted together with a partner that is Benong II Farmers Group, in the Kalibuaya Village, Telaga Sari, Karawang. The problem that faced by partners is a lack of understanding of plant pest organisms (OPT), especially plant pests and diseases, as well as a lack of knowledge about the natural enemies. Knowledge and skills of the Benong II Farmers Group in the Kalibuaya Village, Telaga Sari, Karawang regarding the management and control of rice stem borer that environmentally friendly, especially biological control using parasitoid Trichogramma sp. needs to be improved. The evaluation results show that counselling and training on the breeding of natural enemies Trichogramma sp. resulting in the development and progress of the behavior, attitudes, and skills of farmers. There are four main results of the research. The results are (1) farmer more understand of the use of biological agents for IPM-based rice pest and disease control; (2) want to implement the control of rice stem borer Scirpophaga sp. by using Trichogramma sp.; (3) more skilled in monitoring the presence or absence of pests in rice plantations in the field; and (4) more active in finding out to community service teams, farmer group leaders, and POPT / field extension officers about how to mass culture theTrichogramma sp. and it’s release techniques in the field.
Fix Desalination System Technology as Development of Creative and Innovative Capabilities of Youth Community
Authors: Prayetno Eko , Putra Risandi Dwirama , Kurniawan Dedy , Ghutowo Edwin , Adji Soedrajad Haryo , Hidayah Ricky Try Noer , Adih Adih
Published: May 2019

Community service activity is conducted in the region of KKN-PPM Universitas Maritim Raja Ali Haji (UMRAH) in the Malang Rapat Village, Bintan Regency.  Malang Rapat Village was chosen because of the location on the coastal area and have a concern about the management of hydrology, clean water resources and the management of limited water resources.  The lack of information and transfer of knowledge to the community in the coastal areas will produce some difficulties to solve the problems, especially in solving the problems regarding the adequacy and need for clean water. Then the general condition of the youth village in the coastal areas is not goal oriented. Based on those exercising their Community Services activities are carried out using the learning development by including the principle of 4C (Creative, Collaborative, Communicative and Competitive). It is expected that with the development of scientific principles that incorporate the principle of the transfer of the value of creativity, collaborative, communicative and competitive will give a very good impact to the target object for the long term. In this case, appropriate technology was designed for a public event in the Region KKN-PPM Malang Rapat Village in helping to resolve the problem of clean water needs for consumption is making Fix Desalination System. Fix Desalination System designed structure mica glass/acrylic which has a volume of 1 m3 to produce 15.95 ml distilled fresh water in the tank within 6 hours.
The Causality between Foreign Direct Investment and Economic Growth in Botswana: A Multivariate Analysis
Authors: Owusu Erasmus L
Published: May 2019

The paper empirically investigates the short and long-run causal relationship between foreign direct investment, credit to the private sector, trade openness, gross national expenditure and economic growth in Botswana. In doing this, the paper employs multivariate Granger-Causality within an ARDL-bounds approach to co-integration and unrestricted error correction model (UECM). The paper finds that FDI inflow does not spur economic growth but rather, it is economic growth which promotes FDI inflow, credit to the private sector, trade and national expenditure. However, the paper finds a bi-directional relationship between FDI inflow and credit to the private sector both in the short and the long runs. Thus, policies should be targeted at improving the investment climate for existing domestic and foreign investors through infrastructure development and that external capital inflow should be complemented by domestic savings and investors on other to boost economic growth in Botswana.
Modelos Cuantitativos en Ciencias de la Vida y la Tierra
Authors: Allier Ondarza Alicia
Published: May 2019

Una de las asignaturas del Bachillerato a Distancia de la UNAM es Modelos Cuantitativos en Ciencias de la vida y la Tierra. En ella se favoreció una visión más profunda e integrada de los fenómenos y principios fundamentales de ciertos contenidos de Biología, Medicina, Física y Química, al trabajar procedimientos generales para la construcción de algunos modelos matemáticos accesibles para nivel bachillerato, tanto relacionados con el azar como con el concepto de función. Esto contribuye a que el estudiante valore las Matemáticas como un instrumento de conocimiento para las ciencias de la vida e incremente sus posibilidades de argumentar, discutir y transmitir ideas, tanto en el lenguaje materno como en lo que a Matemáticas se refiere. Todo ello pretende incidir en la formación cognitiva del estudiante.
Acciones en evaluacion: Bachillerato a Distancia, Sistema de Universidad Virtual, U de G
Authors: Ochoa Reynoso Rosa Marcela
Published: May 2019

Todo proceso educativo contempla necesariamente el momento de la evaluación, de lo contrario no podríamos valorar en su justa dimensión los resultados obtenidos, las metas logradas ni los incidentes que pueden presentarse a lo largo de cualquier proceso tales como las dificultades, las oportunidades, los aprendizajes y los retos; elementos sin los cuales sería estéril la toma de decisiones correspondiente.

El Sistema de Universidad Virtual, de la Universidad de Guadalajara, consciente de ello, cuenta en su estructura orgánica con la Coordinación de Evaluación, que diseña, integra, coordina y sistematiza diversos procesos evaluativos a nivel institucional. Sin embargo, al ser la evaluación una tarea transversal, existe la colaboración interinstitucional de diversas Coordinaciones de la Dirección Académica del SUV. En este documento se comentarán seis experiencias de evaluación en el Sistema de Universidad Virtual, que impacta no sólo al Bachillerato a Distancia sino a los demás programas educativos de UDG Virtual.

• Evaluación de los aprendizajes

• Acreditación por competencias

• Proceso de selección de los aspirantes

• Evaluación del desempeño docente

• Sistema de gestión de la calidad

• Acreditación de la licenciatura en Educación
LA LABOR DEL DISEÑADOR INDUSTRIAL EN B@UNAM
Authors: Oropeza Mota Juan
Published: May 2019

La labor del diseñador instruccional nunca es sencilla, más aún cuando se trata de trabajar en un programa de bachillerato a distancia tan ambicioso como el ofrecido por la UNAM. En el presente escrito se describe, a grandes rasgos, dicha labor, en la cual deben tomarse en cuenta varios aspectos para lograr, por un lado, los propósitos de las asignaturas y por otro, que los alumnos aprendan y se sientan constantemente motivados para continuar sus estudios en esta modalidad.
Seguimiento al aprendizaje en el Bachillerato a Distancia de la UNAM. Caso: propedéuticos del GDF
Authors: Hernández Gutiérrez Myrna
Published: May 2019

La Coordinación de Bachillerato a Distancia de la UNAM ha desarrollado un modelo educativo innovador en el ámbito de la enseñanza media superior. En este modelo, el seguimiento al aprendizaje de los alumnos que realizan los tutores en colaboración con los asesores es fundamental. La estrategia de gestión de dicho seguimiento que se presenta aquí, se centra en los cursos propedéuticos del proyecto del Gobierno del Distrito Federal y tiene como característica distintiva la atención a poblaciones de miles de alumnos.
Experiencia pedagógica de cultura física y salud en Preparatoria a Distancia
Authors: López Lucio, María Enriqueta
Published: May 2019

La asignatura Cultura Física y Salud de la Preparatoria a Distancia de la UANL, pretende que el estudiante conozca y desarrolle de manera gradual y sistemática sus capacidades físicas, lo que le permitirá una maduración física y mental equilibrada. Está diseñada para la modalidad a distancia a través de un CD interactivo y con sesiones presenciales para realizar la práctica deportiva recreativa y el programa de acondicionamiento físico que contribuirán a su desarrollo integral de manera divertida. También tiene el objetivo de fomentar en el estudiante una alimentación adecuada y hábitos que le permitan llevar un estilo de vida saludable.
Escuela Virtual de Florida
Authors: Young Julie
Published: May 2019

Durante el ciclo escolar 1996, el condado de Orange en Florida piloteó una “escuela web” con cinco cursos en línea. El Departamento de Educación de Florida (DEF) actuó como un catalizador para impulsar la alianza entre los condados de Orange y Alachua. En noviembre de ese año el DEF aportó a dos distritos 200 mil dólares en lo que constituyó un financiamiento llamado “Rompa el Molde” para desarrollar el proyecto Florida High School (FHS). Después de un intenso periodo de planeación y desarrollo, FHS fue lanzada, con siete miembros del equipo de trabajo, en agosto de 1997.
Quantum process tomography of a high-dimensional quantum communication channel
Authors: Bouchard Frédéric , Hufnagel Felix , Koutný Dominik , Abbas Aazad , Sit Alicia , Heshami Khabat , Fickler Robert , Karimi Ebrahim
Published: May 2019

The characterization of quantum processes, e.g. communication channels, is an essential ingredient for establishing quantum information systems. For quantum key distribution protocols, the amount of overall noise in the channel determines the rate at which secret bits are distributed between authorized partners. In particular, tomographic protocols allow for the full reconstruction, and thus characterization, of the channel. Here, we perform quantum process tomography of high-dimensional quantum communication channels with dimensions ranging from 2 to 5. We can thus explicitly demonstrate the effect of an eavesdropper performing an optimal cloning attack or an intercept-resend attack during a quantum cryptographic protocol. Moreover, our study shows that quantum process tomography enables a more detailed understanding of the channel conditions compared to a coarse-grained measure, such as quantum bit error rates. This full characterization technique allows us to optimize the performance of quantum key distribution under asymmetric experimental conditions, which is particularly useful when considering high-dimensional encoding schemes.
Política económica regional e impactos sociales: el caso de la maquinaria agrícola argentina
Authors: Vigil José , Sacchi Melina
Published: May 2019

El artículo propone una exploración empírica en Argentina sobre la manera en que se conforma una región económica, la forma como en dicha construcción se articulan políticas nacionales y regionales, y las relaciones que existen entre la dinámica económica de la región conformada y sus impactos sociales. Así entonces, se analiza la región argentina de producción de maquinaria agrícola ubicada en el corazón de la pampa húmeda argentina, que “emergió” con mayor fuerza en el mapa político y económico argentino durante el nuevo modelo desarrollista que intentó un proceso de reindustrialización de la economía a partir de 2001; ello permite mostrar que la región tuvo un comportamiento favorable en sus indicadores sociales.
El mercado laboral argentino en la posconvertibilidad (2003 - 2015): entre la crisis neoliberal y los límites estructurales de la economía
Authors: Arakaki Agustín , Graña Juan M. , Kennedy Damián , Sánchez Matías A.
Published: May 2019

El artículo se propone estudiar la evolución del mercado laboral argentino en la posconvertibilidad, así como sus principales transformaciones. Para ello, se analizan diferentes variables (empleo, salario, calidad del vínculo laboral, evolución del sector informal urbano) a partir de considerar a la renta de la tierra y el rezago de productividad de la economía argentina como los determinantes estructurales del proceso de acumulación de capital argentino. Entre los resultados se observa una importante reversión de las tendencias que operaron desde mediados de la década de 1970, particularmente hacia la de 1990, de modo que el periodo se cerró con niveles sustancialmente mejores. No obstante, dicha recuperación se estancó hacia 2011 - 2012, lo cual, desde una perspectiva de largo plazo, muestra una población trabajadora atravesada por una diferenciación en sus condiciones de reproducción, mucho más profundas que las existentes en el pasado.
Pendidikan Seni Musik Tradisional Manggarai dan Pembentukan Kecakapan Psikomotorik Anak
Authors: Leonangung Edu Ambros , Tarsan Vitalis
Published: May 2019

Salah satu unsur budaya yang menjadi aset orang Manggarai adalah seni musik tradisional. Bagi generasi sekarang, aset budya ini cenderung termajinalisasi. Rasa cinta anak-anak Manggarai untuk bermain music tradisional makin memudar. Partisipasi anak-anak dalam membawakan music tradisional budaya Manggarai memprihatinkan. Anak-anak kurang mengenal birama musik tradisional Manggarai seperti takitu, kedendit, concong, mbata, ndundu ndake, mumere. Jika fenomena ini terus dibiarkan maka lambat laun generasi anak Manggarai kehilangan warisan kekayaan leluhur yang sangat berharga. Kegiatan Pengadian kepada Masyarakat  PkM) ini dimaksudkan untuk menumbuhkembangkan dan melestarikan musik tradisional Manggarai. Selain itu, kegiatan PkM ini juga dimaksudkan untuk memperkuat dan meningkatkan kecakapan motorik anak SD Barang Cibal, melalui pelatihan birama music tradisional Manggarai: ndundu ndake, concong, kedindit, dan takitu. Kegiatan ini didasarkan pada analisis situasi problematik yang dihadapi mitra, anak-anak SD di Kampung Barang Cibal. Pendekatan yang dipakai dalam kegiatan ini adalah pendekatan edukasi melalui pelatihan. Metode yang dipakai adalah pelatihan yang dikemas dalam suasana fun learning. Tempat pelatihan dipusatkan di rumah gendang, rumah adat Manggarai, kampong Barang Cibal. Dalam proses pelaksanaannya, kegiatan pelatihan ini melewati beberapa tahap: persiapan; rancangan kegiatan PkM; dan pelaksanaan
Peningkatan Ekonomi Keluarga Melalui Pemanfaatan Tanaman Toga Sebagai Jamu Keluarga
Authors: Lestari Siti , Roshayanti Fenny , Purnamasari Veryliana
Published: May 2019

Fokus program kegiatan adalah peningkatan penghasilan anggota Keluarga Mitra melalui program unggulan budidaya tanaman toga sebagai jamu kelurga. Pembentukan kluster dalam program kegiatan ini, meliputi: (1). Kluster budidaya tanaman toga sebagai bahan baku jamu, dan (2). Kluster diversifikasi produk dari limbah jamu. Kluster ini terdiri atas dosen, mahasiswa, pemerintah kabupaten, dan masyarakat / mitra kerja yang bekerja secara sinergis dan terpadu untuk menghasilkan budidaya tanaman toga dan olahan limbah jamu. Penjaminan berkelanjutan program dilakukan melalui pengembangan kerjasama dengan berbagai elemen masyarakat, akademisi, stake holder, dan industri. Pelaksanaan program didasarkan pada riset yang telah dilakukan oleh dosen, instansi terkait, dan mahasiswa TIM KKN-PPM Universitas PGRI Semarang yang terdiri atas berbagai disiplin ilmu. Hasil dari kegiatan KKN PPM ini adalah tersedianya bahan baku melalui budidaya tanaman toga di Kelurahan Wonolopo, diversifikasi produk dari limbah jamu berupa sabun rempah dan pupuk organik cair, dan pemasaran secara online produk jamu dan olahan dari limbah jamu. Kegiatan ini dapat menambah penghasilan masyarakat Kelurahan Wonolopo dan menciptakan 2 UMKM baru yaitu UMKM Sabun Rempah dan UMKM Pupuk Organik Cair yang berbahan baku limbah jamu
Histórias em quadrinhos como ferramenta de contextualização de conceitos matemáticos
Authors: Araujo Junior Francisco de Paula Santos de , Trindade Anna Karla Barros da , Oliveira Lindon Johnson do Nascimento
Published: May 2019

A falta de contextualização da matemática dificulta a assimilação de seus conceitos, impedindo a aprendizagem significativa do aluno. Histórias em quadrinhos são ótimas ferramentas de contextualização, capazes de fazer com que o aluno aproprie-se da matemática e a veja como aliada. Este trabalho tem por objetivo apontar as possibilidades de aprendizagem da matemática por meio da contextualização de seus conteúdos usando as histórias em quadrinhos como recurso pedagógico. A partir de uma revisão bibliográfica, fundamentada nos estudos de MCCLOUD (2018), RAMA (2010), VERGUEIRO (2010, 2012), e outros que repercutem o potencial de uso das HQ’s na educação, argumenta-se a forma como as HQ’s podem ajudar na contextualização dos conceitos matemáticos, servindo de recurso ambientador, mediando o diálogo entre aluno, professor e o conceito matemático. Na pesquisa foram encontrados diversos fatores que apontam o uso benéfico das histórias em quadrinhos em sala, bem como sua importância como recurso didático disponível ao professor.
FRACTAIS: possibilidades pedagógicas na escola básica
Authors: Suleiman Amal Rahif
Published: May 2019

Neste artigo apresentamos elementos da Geometria Fractal que podem estar presentes na Natureza, assim como os que podem ser construídos por algoritmos matemáticos. Tem por objetivos refletir sobre os aspectos gerais dos fractais, sobre a revisão bibliográfica, as pesquisas atuais, sobre sua alta aplicabilidade no mundo digital e tecnológico. Abordamos a ilustração de exemplos para calcular perímetro e área de um fractal. Nesse sentido, apresentamos duas possibilidades pedagógicas que podem ser aplicadas na Escola Básica: o Jogo do Caos e Fractais com Múltiplos no Triângulo de Pascal. Além do conhecimento matemático, destacamos ainda, mediante essas e outras atividades, a relevância de que a Geometria Fractal seja inserida como conteúdo nos programas da Matemática Escolar do Estado de São Paulo, como já ocorre em outros estados do país.
Los primeros registros geológicos y paleontológicos del Neuquén: la expedición de Luis de la Cruz y Goyeneche en 1806
Authors: AGUIRRE URRETA María Beatríz , Ramos Victor A.
Published: May 2019

Luis de la Cruz y Goyeneche realizó en 1806 un viaje de reconocimiento comisionado por las autoridades de Chile y del Virreinato del Río de la Plata. A principios del siglo XIX se propiciaba la búsqueda de un camino más directo entre Buenos Aires y el centro-sur de Chile, con la finalidad de mejorar la actividad comercial, atravesando territorios desconocidos y habitados por los indios. Aquí se analiza el recorrido en el territorio de la actual provincia del Neuquén a la que ingresó por el paso Pichachén, también conocido como boquete de Antuco, y siguió el curso del río Reñileuvú por su margen sur hasta su desembocadura en el río Neuquén. Luego se dirigió hacia el sur, recorriendo Treuco, pasando por el cerro Caicayén y por Truquicó para llegar a la unión de los ríos Curi Leuvú y Neuquén. Siguió viaje hacia Auquinco y desde allí atravesó la vega de Tril, con rumbo norte hasta Coboleuvú. A lo largo del camino describió diferentes litologías y en varias localidades hizo referencia a diversos tipos de moluscos petrificados, así como también a troncos y restos fósiles de grandes vertebrados. Estas precisas observaciones corresponden a los primeros registros geológicos y paleontológicos del Neuquén, lo que modifica algunas afirmaciones previas en la literatura geológica de la cuenca Neuquina y remonta por muchos años hallazgos fosilíferos de esta región de lo que hoy es la Argentina, en aquellas épocas aún parte del Virreinato del Río de La Plata.
Carlos F. Stubbe (1884-1964): Minero, bibliófilo, escritor
Authors: Alonso Ricardo N. , Solís Natalia G. , Silva Emilia del V.
Published: May 2019

El ingeniero de minas sueco Carlos Federico Stubbe (1884-1946), tuvo una importante y a la vez desconocida actuación en nuestro país. Se presentan en este trabajo datos biográficos inéditos producto de una minuciosa búsqueda en archivos y viejos documentos mineros. Stubbe se radicó en la provincia de Tucumán y fue colaborador de Abel Peirano en la década de 1930. Era políglota. Tradujo del sueco el libro del conde Eric von Rosen, ?Un mundo que se va?. Tradujo del alemán los principales trabajos de Federico Schikendantz. Realizó traducciones del inglés para los ?Cuadernos de Mineralogía y Geología? que editaba entonces la Universidad Nacional de Tucumán. Publicó un valioso ?Vocabulario Minero Antiguo?. Dejó inéditos dos libros sobre minería, mineralogía e historia de la minería que se conservan como manuscritos. Reunió una amplia bibliografía que forma el núcleo fundacional de la actual biblioteca del Instituto de Geología y Minería de la Universidad Nacional de Jujuy. En su homenaje se ha propuesto bautizar dicha biblioteca con el nombre de ?Ing. Carlos F. Stubbe?. Su ?Vocabulario Minero?, la traducción del ?von Rosen? y el hallazgo del yacimiento de fluorita Mina ?DAL? en Catamarca, constituyen tres piedras angulares sobre las que se asienta la valiosa obra de este olvidado minero sueco.
El petróleo de San Cristóbal. ¿Realidad o leyenda?
Authors: Calegari Ricardo Juan , Reinante Sara
Published: May 2019

El presente trabajo tiene como objetivo hacer un resumen de las actividades exploratorias desarrolladas en la zona de San Cristóbal, provincia de Santa Fe (República Argentina) desde el año 1913 a la actualidad. Trata de valorar, dentro del análisis del Sistema Petrolero, las manifestaciones de hidrocarburos descriptas tanto en el pozo N° 8, perforado por el Ministerio de Agricultura  en la búsqueda de agua para el ferrocarril del Estado, como en el perforado por Yacimientos Petrolíferos Fiscales (YPF) entre los años 1933 y 1935.Es importante destacar que con la perforación del pozo San Cristóbal-1 se inició formalmente la exploración de petróleo en el sector argentino de la cuenca Chacoparaná. Las manifestaciones de hidrocarburos descriptas en ambos pozos durante la perforación, desataron en su momento expectativas en la sociedad y fueron responsables de grandes títulos en la prensa provincial y nacional sobre lo que podría constituirse en un nuevo yacimiento de petróleo. Pero lamentablemente no fue así. Sin embargo, la lectura crítica realizada sobre legajos de pozos, informes técnicos y diarios de la época, como también la incorporación de nuevos datos de laboratorio, han posibilitado mejorar el análisis de los elementos y procesos del Sistema Petrolero. Estos avances permiten aseverar que niveles de areniscas de probable edad mesozoica del sondeo San Cristóbal-1, cercanos a la profundidad de 1.350 mbbp, han estado expuestos a procesos de migración de hidrocarburos líquidos.