bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of a Comparison Method of Sonar Systems for Surface Platforms
Authors: Cortes Ciro Andrés , Pinzón Villarroel Ennio Emanuel
Published: August 2017

This work sought to study the models of acoustic signal propagation in marine environments according toopen literature currently available, by interpreting the different effects occurring during their propagationand their characteristic principal parameters; identifying models of underwater acoustic propagation thatmay occur and its corresponding simulation for its understanding. Software, denominated BELLFAT,was developed in Matlab, which permits predicting, evaluating, and analyzing the capabilities of anactive sonar system. Such can function by taking depth, temperature, salinity in the sea of any referencearea and the characteristics of the sonar to evaluate. Thus, this computational tool is established to studymarine sonar systems sought to be developed or as a key piece to establish the characteristics active sonarmust have for the purposes of a surface platform.
Infrared Signature Analysis of Surface Ships
Authors: Marrugo Llorente Stefany del P. , Díaz Charris Vladimir , Gómez Torres José M.
Published: August 2017

The process of analyzing IR signature of a vessel is described in this document, which was developed using the ShipIR/NTCS software. As important aspect of the process, highlighting the pre-processing stages of the geometry under study and characterization of the environment. This document contains the results obtained for different background conditions, varying the type of sensor used, their distances and height measuring speed vessel under study and the time of day.
A method for track fusing using data association in naval combat system
Authors: Oh Eunmi
Published: August 2017

In today battlefield multi-sensors installed on naval ship are acquiring too much information. Information is used through naval combat system to improve reaction capability to threat more quickly and precise. For acting to threat, we have to make a decision whether same ones what each target from multi sensor and execute track fusion according to result of judgment. So in this paper, we propose the track fusion method using track’s varied information. We predicted and estimated the target state based on dynamic information using data association filter so made valid measurement area what is assumed that track exists. This algorithm can set up the criterion what is adaptive current status of track. Second we selected track among existing tracks in valid area by attributing weighting. The weight considers track’s information like identification, category and so on. We would like to execute more precisely track fusion through this fusion algorithm.
Analysis of Operational and Seakeeping aspects in the Design of PSV type for the Colombian Caribbean Sea
Authors: Cabrera Jairo H. , Medina Cinthya Marcela
Published: August 2017

Colombia is currently searching for oil and gas at sea as new exploratory frontiers so as to incorporate new reserves. With the beginning of maritime operations comes the need for large offshore structures that allow the extraction and separation of oil and gas before transporting it to land. Most of these platforms require specific support and supply vessels, carrying a variety of loads, from liquid and bulk up general cargo, and various specific activities such as towing, rescue staff in case of accidents, firefighting and positioning anchor handling. In the offshore industry, these are known as PSV (Platform Supply Vessels). e main purpose of this work is the hydrodynamic PSV considering the environmental and operational conditions of the Colombian Caribbean including a case study.
New implementation of Work Sampling Analysis for validating the Present Idle Time Indicator of Maintenance and Ship Repairing Business Line of Cotecmar
Authors: Ochoa Carlos , Murcia Henry , Fuciños Raúl , Domínguez Karen
Published: August 2017

This article is focused on the implementation of the Work Sampling technique at the Science and Technology Corporation for the development of the Naval, Maritime and Riverine Industry – COTECMAR, more specifically in the Production Department of the Maintenance and Ship Repair Management located in Mamonal facilities; in order to know the percentage of idle times in performed productive processes and to identify the main triggers, through the estimation of the proportion of time played in specifics activities in a certain period of time, using instantaneous observations of work areas and employing probability sampling to generalize the findings.
Diseño de embarcaciones de alto desempeño usando Simulaciones
Authors: Grannemann Aufforth Fritz , Bertram Volker
Published: August 2017

Simulation-based design increasingly replaces traditional experience-based design. This article gives an overview of techniques now used in advanced industry practice, with particular focus on navy applications. The article covers the basics of the techniques, illustrating approaches and state of the art with applications taken from the experience of Germanischer Lloyd.
Modelo Predictivo Borroso de la Aceleración de Cabeceo de Buque de Alta Velocidad
Authors: Gil Navia Francisco , Contreras Montes Juan
Published: August 2017

An adaptable fuzzy inference technique is being described in order to generate predictive models of the acceleration of the pitching of a high speed vessel, from the data obtained from the web on an experiment conducted by the University of Iowa. The geometry of interest in the experiment is a scale model of the type 1/46.6 of the DTMB model 5415 (DDG-51). The fuzzy algorithm for the generation of the predictive model uses a triangular partition with a 0.5 overlapping and consequents of the Singleton type. The consequents are adjusted in an automatic fashion by using recursive least squares. The algorithm shows a very low computational complexity rate which allows for it to be used for on line identification.
Aplicación de Muestreo basado en Modelos de Control Predictivo a un Vehículo Autónomo Subacuático
Authors: Caldwell Charmane V. , Dunlap Damion D. , Collins Emmanuel G.
Published: August 2017

Unmanned Underwater Vehicles (UUVs) can be utilized to perform difficult tasks in cluttered environments such as harbor and port protection. However, since UUVs have nonlinear and highly coupled dynamics, motion planning and control can be difficult when completing complex tasks. Introducing models into the motion planning process can produce paths the vehicle can feasibly traverse. As a result, Sampling-Based Model Predictive Control (SBMPC) is proposed to simultaneously generate control inputs and system trajectories for an autonomous underwater vehicle (AUV). The algorithm combines the benefits of sampling-based motion planning with model predictive control (MPC) while avoiding some of the major pitfalls facing both traditional sampling-based planning algorithms and traditional MPC. The method is based on sampling (i.e., discretizing) the input space at each sample period and implementing a goal-directed optimization (e.g., A*) in place of standard numerical optimization. This formulation of MPC readily applies to nonlinear systems and avoids the local minima which can cause a vehicle to become immobilized behind obstacles. The SBMPC algorithm is applied to an AUV in a 2D cluttered environment and an AUV in a common local minima problem. The algorithm is then used on a full kinematic model to demonstrate the benefits.
CFD modeling of 2D impact with symmetric entry
Authors: Algarín Roberto , Bula Antonio , Tascón Oscar
Published: August 2017

The 2D impact phenomenon in calm water, considering symmetric entry with vertical velocity is studied. The analysis was performed by using commercial STAR-CCM+ computational fuid dynamics software. Thee results obtained from the simulations are pressure distribution and force during impact. The study was carried out for typical planning of boat sections. The results are compared with models and data obtained from some authors and they present very good agreement.
Ship maneuverability: full-scale trials of colombian Navy Riverine Support Patrol Vessel
Authors: Carreño Moreno Jorge E. , Sierra Vanegas Etty Y. , Jiménez González Victor H.
Published: August 2017

Methodology and results of full scale maneuvering trials for Riverine Support Patrol Vessel “RSPV”, built by COTECMAR for the Colombian Navy are presented. This ship is equipped with a “Pump – Jet” propulsion system and the hull corresponds to a wide-hull with a high Beam – Draft ratio (B/T=9.5). Tests were based on the results of simulation of turning diameters obtained from TRIBON M3˝ design software, applying techniques of Design of Experiments “DOE”, to rationalize the number of runs in different conditions of water depth, ship speed, and rudder angle. Results validate the excellent performance of this class of ship and show that turning diameter and other maneuvering characteristics improve with decreasing water depth.
CFD modeling of 2D asymmetric entry impact along with horizontal velocity
Authors: Algarín Roberto , Bula Antonio , Tascón Oscar
Published: August 2017

The 2D impact phenomenon in calm water, considering asymmetric entry and asymmetric entry withhorizontal velocity is studied. The analysis was performed by using a commercial CFD software (STARCCM+©). The results obtained from the simulations are: pressure distribution, force and roll moment.The study was carried out for typical planing boat sections. Furthermore, the critical conditions requiredfor flow separation from the keel are also determined. The results are compared with models and resultsobtained from some authors and they present very good agreement.
Research in offshore transfer cargo operations; challenges, developments, and new frontiers
Authors: Suell Dutra Max , Lache Ivanovich , Ellermann Katrin , Ramírez Heredia Ricardo
Published: August 2017

Currently, offshore operations are considered activities with high impact on the economy, which standsin direct relation to the products of great importance and value for diverse economic sectors. Thus, itbecomes necessary to implement new technologies that make the manipulation of these products fasterand easier. In this work, the authors introduce the problem in offshore cargo transfer operations. Thisproblem involves different kinds of areas: logistics, dynamics, and control are some of them. The authorspresent an approach for the last two. In the dynamic problem is presented a study on the dynamics of asuspended load connected to a crane via a mechanism with two prismatic degrees of freedom. The studiesshow the complex large-amplitude motion of the load given the visibly nonlinear behavior of the ship.Therefore, the development of a fuzzy controller was necessary to decrease oscillations and position theload in one definitive point of interest. The work presents the test results, demonstrating that this typeof manipulator in combination with an effective control strategy allows for the reduction of oscillationsin offshore activities.
New technological surveillance and benchmarking theories and tools applied to sustainable and strategic planning of the naval industry
Authors: Álvarez Esther , Sánchez Luis Enrique , Molins Santiago
Published: August 2017

Since their beginning, companies establish procedures to observe their competitors. Methods for obtaining this kind of information have evolved with the internet era; a plethora of tools is nowadays available for this job. As a consequence, a new problem has emerged: documentary noise, keeping companies from being able to process and benefit from the huge amount of information gathered. Strategic planning mainly relies on obtaining environmental knowledge, so companies need help on dealing with this documentary noise; technological surveillance and benchmarking are preferred methodologies to achieve this objective, coping with data produced by automatic internet tools like search engines and others. Qualified results of better nature are produced by bringing new theories on information gathering and processing intoboth tools. This article exposes empirical results on the application of a demonstrative technological surveillance system based on different R&D management structures, relying on benchmarking indicators for the naval and aeronautics industries.
Shooting simulator for fluvial combat training
Authors: Rodríguez Carlos F. , Hernández José Tiberio , Figueroa Pablo
Published: August 2017

Virtual shooting training has become very attractive because of possible cost reductions and precise evaluation. This article describes the development of a shooting simulator to train soldiers in fluvial combat. This simulator combines the motion of a mechanical platform with virtual imagery and sound to produce an immersive scenario for training purposes. Our prototype, which is in its last phase of construction, has four training tasks with three levels of difficulty. Initially, each task is defined in terms of a virtual trajectory, used by our custom-based motion platform to produce realistic movements, based on a simple dynamic model from real measurements. Our visualization, sound effects, and metrics are implemented on the Torque game engine. Finally, a postprocessor system computes a metrics report.
Accessibility applied to ships, case study Riverine Ambulatory Care Center (RACC)
Authors: González Diana Lorena , Areiza Frieri Priscilla
Published: August 2017

Accessibility as a design concept is generally applied in land constructions; however, the medical character of the case study requires it to be considered in the design process as of its conceptual stage. The riverine ambulatory care center (RACC) is a mobile health unit to carry out medical missions in populations located on the riverbanks; given the RACC dimensions, these have limited medical services to primary care and health brigades. Physical barriers1 are the causes for an environment being inaccessible; to eliminate them, from the RACC, an analysis and redesign was performed of the conceptual proposal, based on standards for accessibility, medical spaces, and ships. Two basic moments were taken for intervention, access and interior circulation, yielding as a result the design of an integrated system of products that eliminate the physical barriers from the environment, permitting boarding and offering medical services under equal, comfortable, and safe conditions. Accessibility as modifier of the environment to improve the quality of life of users should not only be applied in medical ships, this study opens an opportunity for industry to optimize the physical environment of other types of ships by applying this concept.
Smoothing warships movements based on wavelets
Authors: Riola J.M. , Girón J.M. , Díaz J.J.
Published: August 2017

In seakeeping terminology, the Quiescent Period is known as the period of calm in rough waters to allow the ship to perform operations such as landing aircrafts and unmanned aerial vehicles (UAVs), aswell as the entry of landing crafts in the basin. Quiescence refers to the interval of time where all ship motions are within acceptable limits to perform a desired activity. Among the key issues for Quiescent Period Prediction is to be able to measure waves from a suitable distance and predict ship motions in response to waves encountered; both aspects are crucial and must be taken into account. Many of the opearations performed at sea are carried under severe weather conditions, as a result of this situation there is a need to determine this called “window of opportunity” that allows carrying them out. The paper aims to explain from the point of view of Quiescent Period Prediction, the most promising wave measurement systems, which are currently based on radar, but the main question is that if we want predictions a few seconds ahead, it will be appropriate to measure waves at a distance of some hundreds of meters, describing the new mathematical model based on wavelets in determining the spread of the waves from their initial measurement until they reach the vessel.
Underwater Multi-influence Measurements as a Mean to Characterize the Overall Vessel Signature and Protect the Marine Environment
Authors: Sánchez García Antonio , Hernández Solano Adolfo , Rodrigo Saura Francisco J. , Muñoz Esparza Patricio
Published: August 2017

The overall signature of a vessel comprises acoustic, magnetic, electric-field, pressure, and seismic radiations. Over the past years, the international community’s efforts have mainly centered on reducing the acoustic influence with the dual aim of decreasing the vessel’s detectability and reducing the levels of acoustic pollution generated in the marine environment. Nowadays, the need to act not only on the acoustic radiation but against the overall set of the vessel’s radiations is becoming increasingly clear, both in the military and the civilian fields, based on aspects like vessel stealthiness, security of harbor and critical infrastructures, and environmental protection. As a key element to achieve this goal, it is greatly important to have at our disposal highly modular and adaptable measurement systems covering the overall set of the vessel’s radiations, with a high capacity of data transmission to base centers to have the capacity to make measurements in all kinds of marine environments.
La pertenencia de género como un capital discursivo para la legitimación: El caso de las presidentas Michelle Bachelet (Chile) y Cristina Fernández (Argentina)
Authors: Valenzuela Mariana
Published: August 2017

Con el aumento del número de mujeres en posiciones de liderazgo político, los estudios han comenzado a indicar que la pertenencia de género se ha convertido en un recurso que las mismas mujeres en política están utilizando como un capital discursivo para la construcción de sus figuras. Bajo la premisa del uso de la pertenencia de género como un elemento para la legitimación de sus figuras de liderazgo político se analiza una selección de discursos oficiales y entrevistas de la mandataria chilena Michelle Bachelet (2006-2010) y de la presidenta argentina Cristina Fernández (2007-2011) durante sus primeros períodos presidenciales. La pertenencia de género en la primera fue utilizada para la instalación de una imagen de liderazgo renovado, mientras que en la segunda fue un recurso para la construcción de un perfil asociado a la figura de las mujeres como luchadoras.

Palabras clave: género, capital discursivo, legitimación, Bachelet, Fernández 

 

 

Membership gender as as capital of discursive legitimation: The case of president Michelle Bachelet (Chile) an Cristina Fernández (Argentina)

With the increasing number of women in positions of political leadership, studies have begun to suggest that gender membership has become a resource that the same women in politics have used as a discursive capital for the construction of his figures. Under the premise of using gender membership as an element to legitimize their political leadership, is analyzed a selection of official speeches and interviews, during her first presidential term, of Chilean President Michelle Bachelet (2006-2010) and of Argentinian President Cristina Fernandez (2007-2011). In the first, gender membership was used for the installation of an image of renewed leadership, while for the second was a resource for building a profile associated with the figure of women as contender.

Keywords:gender, discursive asset, legitimitation Bachelet, Fernández

 

 
Autoridad y escuela. Un análisis histórico desde las experiencias del Instituto Nacional 1973-2010
Authors: Subiabre Paula
Published: August 2017

El presente artículo busca analizar las transformaciones que ha sufrido la autoridad del profesor en la escuela chilena a través de un estudio de caso. Para ello se analizará la noción de autoridad desde una perspectiva histórica en la cultura escolar del Instituto Nacional a través de 4 periodos: 1973-1977, 1982-1986, 1990-1994, 2006-2010. A partir de entrevistas realizadas a ex alumnos del Instituto Nacional se observarán las maneras en que se ha concebido la autoridad en las distintas épocas y las transformaciones que se han producido en los periodos señalados. Durante las últimas décadas se han producido cambios sociales caracterizados por una nueva manera de entender la autoridad, caracterizada por el dialogo, el consenso, la comprensión etc. Esto ha favorecido la democratización de las relaciones sociales y por tanto ha influido en las formas en que se ejerce la autoridad.

Palabras clave: cultura escolar, transformaciones, Instituto Nacional

 

Authority and school. A historical analysis from the experiences of the National Institute, 1973-2010

This article seeks to analyze the transformations that has experienced the teacher’s authority in chilean schools through a case study. In order to do this, the notion of authority will be analyzed from a historic perspective in the
school culture of the Instituto Nacional through four periods: 1973-1977, 1982-1986, 1990-1994, 2006-2010. Starting from interviews performed to Instituto Nacional’s former students, ways in which authority has been conceived in different times will be observed, and the transformations that have been produced during the indicated periods. Over the past decades there have been social changes characterized by a new understanding of the authority, characterized by dialogue, consensus, understanding etc. This has encouraged the democratization of social relations and, therefore, has influenced the ways in which authority is exercised.

Keywords: authority, school culture, transformations, Instituto Nacional

 

 
Movimiento de Economía Social y Solidaria de Ecuador. Circuitos Económicos Solidarios Interculturales
Authors: Jiménez Jhonny
Published: August 2017

El presente artículo hace referencia a la construcción de los Circuitos Económicos Solidarios Interculturales (CESI), como una herramienta metodológica política para el fomento de sistemas económicos solidarios que promuevan la reproducción ampliada de la vida, en búsqueda del sumak ally kawsay (Buen Vivir). Los CESI parten del reconocimiento de la existencia de prácticas económicas ancestrales basadas en la reciprocidad y la redistribución, las cuales están presentes en las diferentes culturas, particularmente en los pueblos andinos. La propuesta de los CESI, al contrario de las cadenas productivas, se construyen en los territorios para satisfacer las necesidades fundamentales de las familias, impulsando prácticas productivas que promuevan el cuidado de la naturaleza, el consumo y la intermediación solidaria. La estrategia de los circuitos es la articulación de diversas prácticas solidarias a través del estímulo de su relación con el mercado y el trabajo en red.

Palabras clave: Circuitos de Economía Solidaria, territorio, consumo solidario, sociedades de mercado, interculturalidad, Buen Vivir (sumak ally kawsay)

 

 

Social movement of Ecuador and Solidarity Economy. Intercultural Circuits of Solidarity Economy 

This article refers to the construction of Economic Solidarity Intercultural Circuits (CESI) as a methodological political tool to promote economic systems that advance solidarity expanded reproduction of life, in search of Good Living (sumak kawsay ally). The CESI based on the recognition of the existence of ancient economic practices based on reciprocity and redistribution, which are present in different cultures, particularly in the Andean peoples. The proposal of the CESI, contrary to the productive chains, are built in the territories to meet the basic needs of families, promoting productive practices that foster care for nature, consumption and solidarity intermediation. The strategy of the circuits is the articulation of various solidarity practices through encouragement of their relationship with the market and networking.

Keywords: Circuits of Solidarity Economy, territory, solidarity consumption, market societies, multiculturalism, Good Living

 

 
Contemporary Latin American Inequality: Class Struggle, Decolonization, and the Limits of Liberal Citizenship
Authors: Webber Jeffery R.
Published: August 2017

Weberian sociological approaches dominate the contemporary study of inequality in Latin America. Theoretically, the major works in the area suffer from a conflation of liberalism and democracy and offer flawed conceptions of capitalism, class, and other social relations of oppression. This article offers an exegesis and critique of several recent influential texts written within the Weberian tradition. It then proposes as an alternative a Marxian-decolonial theoretical framework for understanding inequality and the totalizing power of capital. It demonstrates how such a framework can better account for the complexity of class relations and other internally related forms of social oppression—such as gender, sexuality, and race—in Latin America today. Finally, the article shows the utility of the Marxist-decolonial framework by way, first, of a concrete investigation into the highly contested dynamics of twenty-first-century extractive capitalism in the region, and, second, through an exposition of the life story and activism of Luis Macas, an indigenous activist and intellectual in Ecuador. The core element of Macas’s political subjectivity is an underlying utopian-revolutionary dialectic through which he draws on elements of a precapitalist past in looking forward to an anticolonial and socialist future.
Student Mobilization, Higher Education, and the 2013 Protests in Brazil in Historical Perspective
Authors: Snider Colin M.
Published: August 2017

This article analyzes student mobilization and public discourse on higher education during the June 2013 protests in Brazil in an effort to situate the protests historically. I argue that higher education was a major, yet overlooked, component of the 2013 protests, and that concerns over the failings and shortcomings of Brazil’s university system had deeper roots in institutional problems and student discourses on education, society, and democracy. These historical inequalities combined with institutional memories that offered students models and examples of past mobilization and allowed them to tie their present-day concerns to past examples of student politics. I consider the ways in which the often-overlooked question of educational reform offers insights into ongoing social inequalities in Brazil, the failure of various regimes to address structural issues, and how students in 2013 looked to the past while simultaneously drawing on their own particular educational contingencies. This article situates 2013 historically while exploring the ways in which higher education in the twenty-first century has transformed, even as it remains an important part of political and social struggles between society and the state. Finally, this article explores how the 2013 protests in Brazil reflect ongoing struggles to define the role of the state in society, not just in Brazil but in the Americas more generally.
A Cross Sectional Study to Assess Liver Fibrosis in Patients with Diabetes and Metabolic Syndrome
Authors: Ghori Syed Safiullah , Khalid Hafsa , Alim Mohammed , Quddus Mohammed Abdul
Published: August 2017

The present study was conducted in Osmania General Hospital,Hyderabad.The study included evaluation of liver fibrosis in patients with diabetes and metabolic syndrome. Liver fibrosis is now being considered as reversible process which is characterized by excessive accumulation of extra cellular matrix. The use of non-invasive methods to assess liver fibrosis in patients with HCV, Non-Alcoholic Fatty Liver Disease (NAFLD) and alcohol abuse has been well validated. However use of these non-invasive methods in patients with diabetes mellitus and metabolic syndrome assessed might develop fibrosis during asymptomatic stages. Hence we tried to use these non-invasive methods in patients with diabetics and metabolic syndrome who are at high risk of developing NAFLD or liver fibrosis in routine clinical practice. This was a single center, prospective study. 50 patients with diabetes and metabolic syndrome attending the endocrinology department of Osmania General Hospital were assessed for fatty liver and enrolled in to the study. NAFLD fibrosis score was used to assess liver fibrosis and BARD score was used for staging of fibrosis as per metavir classificationThe mean age of the patients was 50.8 ± 8.2 with 22 males and 28 females. 90% of the population was found to have some degree of fibrosis. 56% of the patients were at advance fibrosis stage as per the BARD score.Patients with diabetes and metabolic syndrome should be constantly evaluated for liver fibrosis apart from development of diabetes and other complications and to prevent any adverse effects due to waning of liver functions.
In Vitro Preliminary Phytochemical Screening and Free Radical Scavenging Ability of Drosera indica L.
Authors: Asha K. R. , Hemmalakshmi S. , Priyanga S. , Devaki K.
Published: August 2017

Aim: The present study is carried out to explore the preliminary phytochemical screening and free radical scavenging activity of the whole plant Drosera indica L. Methods: a) Phytochemical screening – The qualitative analysis of secondary metabolites is carried out by the standard qualitative methods. b) In vitro free radical scavenging activity of the ethanolic and aqueous extract of the whole plant Drosera indica L is used for the analysis .Various concentrations (100 – 500mcg/ml) of the ethanol and aqueous extracts of Drosera indica L. are used in the various antioxidant assay methods such as reducing power, ferric reducing antioxidant power assay (FRAP), nitric oxide (NO) radical,2,2’ azinobis-3 ethylbenzothiozoline-6 sulfonic acid (ABTS+) radical, hydroxyl radical (OH.), 1,1-diphenyl-2-picryl hydroxyl (DPPH) radical , super oxide radical and hydrogen peroxide (H2O2) is carried out with the standard protocols. In all the assays ascorbic acid is used as the standard antioxidant. Results: Phytochemical screening of the plants reveal the presence of numerous chemicals including flavanoids, tannins, polyphenols, cardiac glycosides and saponins. The ethanolic extract of Drosera indica L. shows better ability to scavenge ,1,1-diphenyl-2-picryl hydroxyl( DPPH)radical, hydroxyl radical, hydrogen peroxide, nitric oxide radical and superoxide radical. FRAP and the reducing power abilities of the ethanolic extract is increased with the increase in concentration of the plant extract. Conclusion: The ethanolic extract of Drosera indica L. shows better ability to scavenge the free radicals than the aqueous extract. From this study, a conclusion is drawn that Drosera indica L. can have more beneficial effects with respect to the presence of many active secondary metabolites which may likely to combat with the oxidative stress diseases like diabetes, cancer, cardio-vascular diseases and in general boost the immune system.
A Preliminary Novel Findings on Invitro Anti-Coagulant Activity of Acalypha Indica Linn Leaf Extracts
Authors: U. Ashwini , S. Asha
Published: August 2017

The current study focuses on anticoagulant activity of leaf extract of Acalypha indica (A.indica) and to identify the active constituents present and responsible for the anti-coagulation activity. On sequential extraction of plant materials with petroleum ether, chloroform, ethyl acetate, n-butanol, ethanol and aqueous, crude extracts were obtained and screened for anti-coagulant activity. Anticoagulant activity of six different leaf extracts of A.indica was tested using prothrombin time (PT). In vitro anticoagulation assays were performed with different concentrations of the leaf extract on citrated plasma obtained from healthy volunteer donors. The different concentrations of crude extract tested in the present study were 0.062, 0.125, 0.25 and 0.5 gm/ml. The anti-coagulant activity of six extracts exhibited a concentration dependent activity. Among the six tested extracts, petroleum ether exhibited a highest activity by increased prothrombin time of 60min and 5 sec at 0.5gm/ml compared to positive and negative control. This is followed by aqueous, n-butanol, chloroform and ethyl acetate extract. It was also noted that ethanol extract showed no prolonged prothrombin time and it was within the normal level as compared to the control. Phytochemical screening of different extracts revealed the presence of steroids, terpenoids, tannin, phenols, flavonoids and alkaloids as secondary metabolites. From the results, for the first time it was highlighted that the A.indica leaf extracts affects the intrinsic pathway of coagulation cascade and thus prolongs the clotting time, hence this plant can be used in the management of blood clotting diseases.
Self-Assembling Peptides- Notion and Medical Applications: A Review
Authors: Sharma Anoojnya , Gowda D. V. , Gupta N. Vishal Kumar , Osmani Riyaz Ali M.
Published: August 2017

Peptides are the building blocks which are widely used owing to their biology as well as their chemistry. They provide a vast platform in the area of medicine. Self-assembling peptides are peptide biomaterials which are pacing in the field of diagnosis, therapeutics, tissue regeneration and vaccine. Self-assembling peptides provide an excellent alternative to the conventional methods for the drug delivery and the treatment. In this article, we discuss about the various medical applications of self-assembling peptide as they have excellent biocompatibility and resemblance with the proteins in the biological system. These are constructed and modified using various amino acid sequences depending upon the type of the application for which it is being used
EFEKTIFITAS SUPLEMENTASI Zn DALAM PENINGKATAN TINGGI BADAN DAN SKOR Z TB/U PADA BALITA STUNTING
Authors: Dyah Kusudaryati Dewi Pertiwi , Prananingrum Ratih
Published: August 2017

Defisiensi Zn dikaitkan dengan pertumbuhan yang tidak optimal. Salah satu dampak dari kegagalan pertumbuhan pada balita ditunjukkan dengan terjadinya stunting (pendek). Tujuan penelitian ini untuk mengetahui efektifitas suplementasi Zn dalam peningkatan tinggi badan dan skor Z TB/U pada balita stunting. Penelitian ini menggunakan desain eksperimen dengan randomized pretest posttest design. Sebanyak 18 balita stunting diberkan suplemen Zn 4 mg tiga kali seminggu selama 12 minggu. Hasil yang diperoleh diketahui sebesar 38,9% subyek berstatus gizi yang semula stunting menjadi normal setelah suplementasi Zn. Uji paired t test menunjukkan ada perbedaan tinggi badan dan skor Z TB/U sebelum dan setelah suplementasi Zn (p = 0,000 dan p = 0,004), secara berurutan) dengan peningkatan tinggi badan rata-rata 2,8 cm dan skor Z TB/U rata-rata 0,2 SD. Kesimpulan dalam penelitian ini bahwa suplementasi Zn efektif dalam meningkatkan tinggi badan dan skor Z TB/U balita stunting.
HUBUNGAN FREKUENSI OLAHRAGA AEROBIK DENGAN KEJADIAN DISMENORE PADA REMAJA PUTRI
Authors: Haryanti Rusiana Sri
Published: August 2017

Dismenore adalah nyeri saat haid, biasanya dengan rasa kram dan terpusat di abdomen bawah. Keluhan nyeri haid dapat terjadi bervariasi dari yang ringan sampai berat. Angka kejadian dismenore di Jawa Tengah mencapai 56 %. Latihan olahraga aerobik mampu mengurangi gejala gangguan menstruasi seperti dismenore.Berdasarkan studi pendahuluan yang dilakukan di Aerobic Syariah Surakarta, mayoritas remaja tidak teratur mengikuti senam aerobik mengalami dismenore.Mengetahui hubungan frekuensi olahraga aerobik dengan kejadian disminore pada remaja putri.Metode penelitian ini menggunakan analisis korelasi dengan pendekatan cross sectional. Sample pada penelitian ini yaitu 30 responden dengan tekhnik sampel menggunakan purposive sampling. Instrumen penelitian menggunakan cheklist. Analisa data menggunakan chi square.Mayoritas remaja dengan frekuensi olahraga aerobik tidak teratur yaitu ada 19 orang (63,3%), sedangkan mayoritas dengan kejadian nyeri dismenore dalam kategori sedang yaitu ada 15 orang (50.0%). Nilai N = 30, df = 2 dan α = 5% diperoleh x2 hitung 7,177, sedangkan x2 tabel 5,99, sehingga disimpulkan bahwa x2 hitung (7,177) > x2 tabel (5,99) ha diterima dan ho ditolak. Terdapat hubungan antara frekuensi olahraga aerobik dengan kejadian dismenore pada remaja putri.
Appraisal of an innovative word game to release stress by positional shift
Authors: Ghosh Asit Ranjan
Published: August 2017

No abstract available
Law enforcement and cardiovascular risk: Findings of a cross-sectional study from Rural Karnataka
Authors: George Carolin Elizabeth , Gift Norman , Mukherjee Devashri , Maddipati Tatarao
Published: August 2017

Background: Police personnel experience job-related factors that put them at risk of heart disease. Close encounter with difficult situations and unpredictability of working hours posethem with high stress which can increase the chance of heart disease. Aims and Objective: The current study aims to find out the prevalence of individual and aggregated cardiovascular disease (CVD) risk factors and a10 year risk prediction of a fatal or non-fatal cardiac events using the Framingham risk score.Materials and Methods: A cross sectional study was conducted among 60 police personnel of Devanahalli Taluk in Bangalore rural district. The study comprised a pre tested semi structured questionnaire; body mass index, waist circumference, waist hip ratio systolic and diastolic blood pressure measurements, and random plasma glucose estimation. Pearson’s correlation coefficients were calculated for Framingham risk score with individual CVD risk factors. Multivariate logistic regression was done to measure the association of CVD risk factors with Framingham risk score.Results: The prevalence of aggregated cardiovascular risk was high, 85% of them had a combination of 2 or more risk factors. Greater age (> 50 years), smoking, waist circumference, waist hip ratio and presence of hypertension were significantly associate with high 10 year CVD risk categories. Age and systolic blood pressure showed a significant positive correlation with CVD risk.Conclusion: An alarming 40% of the police personnel had a high risk of a fatal or non-fatal cardiac event in the next 10 years. This warrants the need for regular CVD risk factor screening and targeted health education programs along with lifestyle modification counselling.Asian Journal of Medical Sciences Vol.8(3) 2017 49-54
A Study on the Efficacy of Immunotherapy with Purified Protein Derivative for the Treatment of Recalcitrant Warts
Authors: Puri Neerja
Published: August 2017

Introduction: There are many treatment modalities of warts, but most of them are destructive therapies which have propensity to cause scarring. Many antigens especially purified protein derivative (PPD)  of tuberculin bacilli are being used for the regression of warts.Aims: To study the efficacy of purified protein derivative of tuberculin bacilli in the treatment of warts.Methods A randomized controlled trial was done in which 25 patients of recalcitrant warts were taken up for the study. In all the patients, 2.5 units of PPD was injected in each wart and upto maximum of 25 units PPD was given and the injections were given every 3 weeks for a total of 3 sessions.Results: Commonest type of wart seen in our study was verruca vulgaris in 15(60%) patients, verruca plana in 5(20%) patients, palmoplantar warts in 3 (12%) patients and genital warts in 2 (8%) patients.  Regarding the number of warts 15 (60%) patients had more than 20 warts, 5 (20%) patients had number of lesions between 11 – 20 and  another 5(20%) patients had lesions between 1 – 10. Complete clearance of lesions after 3 sessions was seen in 18 (72%) patients, partial clearance of lesions was seen in 4 (16%) patients and no response was seen in 3 (12%) patients.Conclusion: Immunotherapy with PPD causes boosting up of the cell mediated immunity of the patients which causes spontaneous regression of the warts.
A Study of the Efficacy of Skin Needling and Platelet Rich Plasma in the Treatment of Acne Scars
Authors: Ranjan Shivani , Gupta RS , Gupta S
Published: August 2017

Introduction: Permanent scars are the major complications of acne. Correction of scars is the priority for acne patients. Platelet-rich plasma (PRP) may be useful in the treatment of atrophic acne scars by promoting collagen deposition. Skin needling also releases growth factors, initiate a cascade of wound healing resulting in collagen production. Hence, skin needling and PRP should act synergistically to improve acne scars.Objective: To assess the effectiveness of the combined use of skin needling and PRP application in acne scar treatment.Material and Methods: The study enrolled 10 patients of acne scars. Platelet rich plasma therapy with needling was given to them at monthly interval for a therapeutic period of 6 months. The effects of therapy were evaluated based on photographic assessment and patient’s satisfaction.Results: Mean age of the patients was 28.10 ± 5.065. Twenty percent of patients showed excellent response, 80% showed good response. The results were found to be significant with p value < 0.014. Pain and edema were major complaints which subsided in 1-2 days.Conclusion: Platelet rich plasma therapy combined with skin needling is a safe and effective treatment for management of acne scars.
Lewandowski & Lutz Syndrome: A Rare Case Entity
Authors: Mohan Rikta , Gahalaut P , Soodan HS , Mishra N , Rastogi MN
Published: August 2017

Epidermodysplasia verruciformis (EV), first described in 1922 by Lewandowski and Lutz, is a rare inherited genetic disease. The disease usually manifests in childhood with highly polymorphic, widespread lesions.We report a case of a fifteen year old boy, who presented to us with multiple flat topped, hypopigmented papules of a seven year duration on his body. He was diagnosed with EV on a skin biopsy, after ruling out differential diagnosis of pityriasis versicolor, verruca vulgaris and acrokeratosisverruciformis. The patient was resistant to known treatment options.Key message: sun protection and lifelong observation for diagnosis and improved prognosis of malignant or premalignant lesions of EV.
Rabbit Neutering in Primary-Care Education: Insights from a Surgical Clinic
Authors: Benato Livia , Hammond Jennifer
Published: August 2017

Involvement in canine and feline surgical neutering clinics is generally considered to be a key element of primary-care veterinary education, yet opportunities for veterinary students to develop their surgical skills with rabbit patients are uncommon. This is despite the fact that rabbits are currently estimated to be the third most popular companion animal species and the fact that the British Small Animal Veterinary Association (BSAVA) recommends that all non-breeding rabbits be neutered soon after they attain sexual maturity. We describe a pilot rabbit-neutering clinic designed to provide high-quality care for rabbit patients while offering opportunities for undergraduate surgical and case-management skills development. We report on the clinical outcomes for patients. Rates of morbidity (n=18) and mortality (n=1) were low. Of complications reported, the majority (n=16) were considered minor. Challenges included ensuring that staff and students were trained in the specific features of rabbit anesthesia and recovery behavior. We conclude that rabbit surgical clinics offer excellent learning opportunities for undergraduate veterinary students. With prior training in handling and close individual supervision, it is possible to achieve good clinical outcomes and to have a positive impact on the welfare of companion animal populations.
Phase equilibria of the Mo–Al–Ho ternary system
Authors: Li Yitai , Chen Xiaoxian , Liu Hao , Zhan Yongzhong
Published: August 2017

Investigation into the reactions and phase equilibria of transition metal elements (i. e. Mo, Zr, Cr, V and Ti), Al and rare earths is academically and industrially important for the development of both refractory alloys and lightweight high-temperature materials. In this work, the equilibria of the Mo–Al–Ho ternary system at 773 K have been determined by using X-ray powder diffraction and scanning electron microscopy equipped with energy dispersive X-ray analysis. A new ternary phase Al4Mo2Ho has been found and the other ternary phase Al43Mo4Ho6 is observed. Ten binary phases in the Al–Mo and Al–Ho systems, including Al17Mo4 rather than Al4Mo, have been determined to exist at 773 K. The homogeneity ranges of AlMo3 and Al8Mo3 phase are 7.5 at.% and 1 at.%, respectively. According to the phase-disappearing method, the maximum solubility of Al in Mo is about 16 at.%.
Modeling of hardening and fracture behavior in Gr.65 steel after intercritical heat treatments
Authors: Ma Kuan , Yang Jun , Li Wen , Liao Fang F. , Song Yong H. , Xie Xiao L. , Zou De N.
Published: August 2017

For high strength low alloys, intercritical heat treatment processes are usually used to obtain the dual phase steel. In this work, a micro–macroscopic model was developed for describing the hardening and fracture behavior of such steels after the heat treatments. In the microscopic model, a description of flow curves was established based on a 2D representative volume element from a real microstructure, whereas in the macroscopic model, the Gurson–Tveergard–Needleman approach was used to simulate the failure process. Furthermore, the simulation flow curves and true stress–strain curves were compared with the experimental observations. The results demonstrate that such a multiscale model can accurately predict the work hardening and fracture behavior of steels after the intercritical heat treatments.
Design Guidance for J-Turns on Rural High-Speed Expressways
Authors: Claros Boris , Zhu Zhongyuan , Edara Praveen , Sun Carlos
Published: August 2017

Owing to the J-turn’s safety effectiveness, it has become a viable alternative to replace high-crash, two-way, stop-controlled intersections on high-speed expressways. National guidance on the design of J-turns on high-speed highways is limited. What is the safety effect of spacing between the intersection and the U-turn? Under what circumstances is the provision of acceleration lanes recommended? This study answered these questions through a safety assessment on the basis of ( a) an examination of crashes that occurred at 12 J-turn sites in Missouri and ( b) a simulation-based assessment of the effect of various design variables and traffic flows. The crash review revealed the proportions of the five most frequently occurring crash types at J-turn sites: ( a) major road sideswipe (31.6%), ( b) major road rear-end (28.1%), ( c) minor road rear-end (15.8%), ( d) loss of control (14%), and ( e) merging from U-turn (10.5%). The crash rates, accounting for exposure, decreased with the increase in the spacing to the U-turn for sideswipe and rear-end crashes; J-turns with a spacing of 1,500 ft or greater experienced the lowest crash rates. The crash rates were lower for J-turn sites with acceleration lanes for minor road traffic merging onto the major road than for sites without acceleration lanes. A calibrated simulation model analysis revealed that the presence of acceleration lanes reduced conflicts for all volumes and designs, including low volumes. The simulation analysis also reinforced the crash analysis results that safety improved with an increase in spacing between the main intersection and the U-turn.
Beyond Homopolymer Errors: a Systematic Investigation of Nanopore-based DNA Sequencing Characteristics Using HLA-DQA2
Authors: Sárközy Péter , Molnár Viktor , Fogl Dóra , Szalai Csaba , Antal Péter
Published: August 2017

Electronic, nanopore based single molecule real-time DNA sequencing technology offers very long, albeit lower accuracy reads in sharp contrast to existing next-generation sequencing methods, which offer short, high-accuracy reads in abundance. We provide a systematic review of the error characteristics of this new sequencing platform, and demonstrate the most challenging aspects in the field of whole gene sequencing through the human HLA-DQA2 gene using long-range PCR products on multiplexed samples. We consider the limitations of these errors for the applications of this technology, and also indicate prospective improvements and expected thresholds with respect to these errors.