bluuebunny/crossref_metadata_2025 huggingface dataset:
Mayores universitarios y usos de Facebook.
Authors: Feijoo Fernández Beatriz
Published: October 2018

Mientras que el consumo de redes sociales, especialmente de Facebook, se estanca entre los jóvenes, su penetración crece entre las personas mayores, quienes duplicaron su presencia desde 2010 (Pew Research Center, 2015), lo que convierte a este público sénior en el nuevo nicho de mercado para las redes sociales. Con el objetivo de conocer los principales usos que estos mayores activos realizan de las redes sociales, en concreto de Facebook, así como sus principales motivaciones para proceder o no a su empleo, se realizaron entrevistas en profundidad que revelaron a una audiencia que se convierte en usuario pasivo por el temor a sufrir una exclusión digital.
Martin Heidegger en El Rincón de las Fresas Salvajes (Smultronstället, Ingmar Bergman, 1957): narrativas audiovisuales para mostrar la temporalidad.
Authors: Rodríguez Serrano Aarón
Published: October 2018

El presente trabajo pretende explorar la posible traducción cinematográfica del término heideggeriano Temporalidad (Zeitlichkeit) tal y cómo queda reflejada en la película Fresas Salvajes (Smultronstället, Ingmar Bergman, 1957). Para ello, se propondrá en primer lugar una aproximación a la problemática estética de Heidegger en su aplicación cinematográfica. Posteriormente, se estudiarán algunos de los diferentes recursos audiovisuales usados por Bergman para encarar la mostración de la temporalidad desde tres perspectivas narrativas diferentes: la presentación del personaje principal, la escritura simbólica de elementos relacionados con el tiempo y su vivencia, y finalmente, la problemática relacionada con el encuentro ante los otros.
Nuevas formas de Comunicación Política
Authors: PEDREIRA SOUTO Elena
Published: October 2018

Presentación
Usos ciudadanos de Twitter en eventos políticos relevantes.La #SesiónDeInvestidura de Pedro Sánchez
Authors: MARCOS GARCÍA Silvia , ALONSO MUÑOZ Laura , CASERO RIPOLLÉS Andreu
Published: October 2018

Twitter está introduciendo importantes novedades en la comunicación política y se ha tornado un espacio en el que los ciudadanos debaten sobre cuestiones de interés público. Esta investigación analiza el empleo que la ciudadanía hace de Twitter durante un acontecimiento político relevante: la investidura del candidato socialista a la presidencia, Pedro Sánchez. Se aplica un análisis de contenido a través de la etiqueta #SesiónDeInvestidura. Los resultados señalan que los ciudadanos utilizan esta red social para criticar y mostrar su  descontento con la política y su atención se centra en los aspectos personales de los diputados y no en sus propuestas.
Los issues de PSOE y Podemos en Twitter durante la campaña electoral de mayo de 2015 en España
Authors: MACHADO FLORES Neiky , CAPDEVILA GÓMEZ Arantxa
Published: October 2018

Este artículo toma posición respecto a los “issues” que reciben tratamiento en Twitter, durante la campaña electoral española de mayo de 2015. Se hace con la mira puesta, fundamentalmente, en los “hashtags” producidos por las cuentas del PSOE y Podemos, para comparar el tratamiento realizado por partidos tradicionales y noveles. Por tanto, sistematiza el empleo de los “issues” en los “hashtags” y también en sus tuits y retuits. Para el análisis se utilizan dos programas informáticos, creados para la captura y almacenamiento de tuits y para procesar cuantitativamente los datos. Se aplica el análisis de contenido cuantitativo y el cualitativo.
Propuesta de un modelo de análisis cinematográfico integral y aplicación del modelo a rear window, (La ventana indiscreta, 1954) de Alfred Hitchcock
Authors: DEL VALLE MORILLA Ana María
Published: October 2018

El cine de Alfred Hitchcock, como relato clásico, también como acto de comunicación y expresión, reclama una nueva perspectiva para su análisis que responda al carácter integral de la experiencia fílmica, que acoja las dimensiones narrativa y estética como un diálogo entre el director,  representado por la enunciación desde la cámara y el montaje, y el espectador.Se presenta un modelo de análisis que pretende ser aplicable a cualquier película de cine clásico y se pone en práctica sobre una secuencia de RearWindow (Hitchcock, 1954).
YouTube como herramienta significativa para la estrategia de comunicación de marcas: caso de estudio de engagement, insight y creatividad de las cinco campañas más relevantes a nivel mundial de la plataforma de video
Authors: ANTOLÍN PRIETO Rebeca , CLEMENTE Jorge
Published: October 2018

YouTube además de ser la plataforma de vídeo más usada del mundo, se ha convertido en una herramienta imprescindible para la estrategia de comunicación y publicidad de las marcas, ya que en YouTube pueden generar un contenido audiovisual realmente relevante, con posibilidad de ser interactivo, comentado y compartido. A través de las cinco campañas mundialmente más vistas en la última década en YouTube, buscamos los parámetros que comparten las cinco campañas de cinco marcas distintas. Analizaremos su engagement, su insight, su creatividad, lo que realmente les ha hecho ser virales y cómo han conseguido estos anunciantes y publicitarios que esos vídeos de sus campañas hayan querido ser buscados, vistos ycompartidos por los usuarios.
La exhibición cinematográfica en España. Cincuenta años de cambios
Authors: PÉREZ SERRANO María José
Published: October 2018

GARCÍA SANTAMARÍA, José VicenteCátedra. Madrid, 2015. 380 pp.
La información en radio. Contexto, géneros, formatos y realización
Authors: SÁNCHEZ RODRÍGUEZ Gabriel
Published: October 2018

MARTA-LAZO, Carmen y ORTIZ SOBRINO, Miguel Ángel (editores)Editorial FRAGUA, Madrid, 2016, 235 pp. ISBN: 978-847074-721-2
Engagement y compromiso humano: los “lugares” de la promesa
Authors: De Dios Larrú Dr. Juan
Published: October 2018

La sociedad contemporánea atraviesa una aguda crisis antropológica que se manifiesta en el miedo y la incapacidad para comprometerse. La ausencia de generatividad que ello provoca se ha convertido en el principal desafío social. El presente artículo desea profundizar sobre el significado de la experiencia de la promesa e indicar algunos lugares fundamentales donde el hombre puede redescubrir la grandeza de su vocación y aprender a vivir la promesa como fuente de esperanza.
¿Dos caras de la misma moneda?: una reflexión sobre la relación entre engagement y participación en medios
Authors: Bergillos Dr. Ignacio
Published: October 2018

Este texto presenta las principales disciplinas y aproximaciones teóricas que estudian el engagement en medios y adopta una comprensión interdisciplinar del término. A través de una extensa revisión bibliográfica se trata de problematizar el engagement atendiendo a los matices que aportan otros conceptos vinculados a él, como la interactividad, la economía afectiva, el compromiso y, fundamentalmente, la participación. Se apunta finalmente a la necesidad de interpretar los complejos fenómenos comunicativos que involucran a las audiencias partiendo de la base de una relación de confianza y respeto mutuo que reconozca sus desequilibrios de poder y sus implicaciones morales y afectivas.
Engagement y Fuerzas Armadas: Una reflexión acerca del compromiso y la lealtad de lo militar con la opinión pública
Authors: Cervera Fantoni Dr. Ángel Luis
Published: October 2018

El término engagement lo conocemos habitualmente como asociado a compromiso o lealtad, pero no existe un claro consenso en la definición y naturaleza del mismo, a pesar de ser ampliamente utilizado en las comunicaciones referidas al marketing y la empresa. Este artículo se aleja de esas perspectivas tradicionales para entrar en una nueva dimensión, aunque menos conocida, y que es la referida al ámbito de las Fuerzas Armadas, donde el significado del término adquiere otro bien diferente, y que ha servido para delinear las nuevas políticas del uso de la fuerza de la ONU en operaciones de ayuda humanitaria, alivio a desastres, operaciones de búsqueda y rescate; evacuación de no combatientes; apoyo militar a autoridades civiles; implementación de sanciones y embargos; operaciones de demostración de fuerza y protección de fronteras.
El compromiso en Comunicación y Humanidades del siglo XXI
Authors: Musicco Dra. Daniela
Published: October 2018

Presentación
Study on the deep conductive geologic structure by magnetovariational method
Authors: Nguyen Van Thanh , Vo Lieu Nguyen Nhu
Published: October 2018

In the magnetotelluric method, along with the magnetotelluric response functions originating from linear relations between components of the electric and magnetic fields we can determine the magnetovariational response functions derived from linear relations between components of the magnetic field Hx, Hy, Hz. This consideration may significantly enhance the capabilities of the magnetotellurics, since at low frequencies the magnetic field becomes free of nearsurface distortions and shines a nondeceptive light on the deep geoelectric structures. The components of the magnetic field are represented by Wiese–Parkinson matrix 𝑊 . From the matrix, we use the transformations to construct Vozoff tipper 𝑉 , tipper phase ψ, and tipper ellipticity of magnetic field H   to study the electrical heterogeneity. We obtain more information than previous methods because V gives two parameters: direction and amplitude, |V| > |ReW| and |V| > |ImW|; therefore data interpretation has many advantages over previous methods. The results allow us to give meaningful conclusions about the geology, such as mapping some deep conductive geologic structures of the crust.
РЕШЕНИЕ ЗАДАЧИ СТАБИЛИЗАЦИИ ТЕМПЕРАТУРЫ ВОЗДУХА В КАБИНЕ ТРАНСПОРТНОГО СРЕДСТВА
Authors: Пасичник Сергей Николаевич , Сокол Дмитрий Вадимович
Published: October 2018

The subject matter of the article is the processes of synthesis of the automatic stabilization system (ASS) of the temperature in the vehicle cabin simulator using the vortex energy separator (VES) as the executive element of the system. The goal is to correct element synthesis of the ASS (CEs), which provides stability and quality of stabilization with the intensive change in the thermal load. The tasks to be solved are: to construct the functional scheme of the ASS which consist of the positioning circuit of the modes of the VES and the air temperature stabilization circuit in the cabin simulator; applying the results of solving the problem of synthesis of the automatic positioning system (APS) of modes of the VES, construct the structural diagram and mathematical model of the ASS of the temperature in the form of interval transfer functions (TF); perform the static calculation of the system to ensure the accuracy in steady-state and transient modes with linearly varying input influences; solve the problem of ensuring stability and dynamic levels of quality of the temperature stabilization using interval logarithmic amplitude-frequency characteristics (LAFC) and indirect levels of quality of the system's functioning in the frequency domain. The applied methods are: LAFC, real frequency characteristics. The following results were obtained: the functional and structural schemes of the ASS of the temperature in the vehicle cabin simulator are constructed, the interval transfer functions of the open-loop and closed-loop system are determined according to the referencing and disturbing influences. The static calculation of the system is performed to determine the required value of the transfer coefficient of the open-loop ASS based on the condition of ensuring the accuracy of the system in the steady-state mode of operation and with the intensive change in the thermal load. The dynamic calculation of the system was performed, as a result of which the structure and parameters of the CEs were determined based on the analysis of the dependence of the phase stability margin and the cut-off frequency on the values of the parameters of the CEs in accordance with the requirements for dynamic levels of quality. Conclusions. The scientific novelty of the results obtained is following: the frequency method of synthesis of the ASS using interval LAFC has been further developed by investigating the behavior of the logarithmic characteristics on the boundaries of the intervals of parameters of the transfer function of close-loop APS of the of the VES
ОЦІНКА НАДІЙНОСТІ РАКЕТНОГО ДВИГУНА ЯК СКЛАДНОЇ ТЕХНІЧНОЇ СИСТЕМИ ЗА НЕДОСТАТНЬОЇ СТАТИСТИЧНОЇ ІНФОРМАЦІЇ
Authors: Габрінець Володимир Олексійович , Подольчак Сергій Михайлович
Published: October 2018

The subject matter of the article is an analysis of methods for assessing the reliability of a complex technical system applicable to a rocket engine for solving the problem of estimating the reliability of a rocket engine at an early stage of its development. The goal is to determine the method of estimating the reliability of a rocket engine with insufficient statistical information. The tasks to be solved: to carry out the analysis of existing methods for assessing the reliability of a complex technical system; to justify the expediency of their application for assessing the reliability of the rocket engine at an early stage of its development; choose an effective method for solving the problem. In work the analysis of following methods was carried out: a method of rationing reliability taking into account the complexity of the system and the importance of the elements belonging to the system; method of "weighting factors"; method of accounting for a priori information when using the model "parameter – one-way tolerance field". The following results obtained during the research. As a result of the analysis of existing methods for assessing the reliability of a complex technical system, it argues that they can apply to a rocket engine in terms of the availability of sufficient information When determining the method for estimating the reliability of a rocket engine with insufficient statistical information, a reliability chosen model that allows estimating the level of reliability of a rocket engine at an early stage of its development with insufficient information.  Conclusions. The scientific novelty of the results is following: the proposed method makes it possible to assess the level of reliability of rocket engines of new developments when the designers do not have sufficient statistical information on the results of reliability tests, that is, at the very beginning of the development of the rocket engine; developed methods for assessing reliability of a complex technical system applied to a rocket engine with the use of the "parameter – one-way tolerance field" model was further developed, thanks to the availability of a priori information, which makes it possible to use them for various approaches to assess the reliability of a rocket engine, depending on the amount of information available
МЕТОДОЛОГИЧЕСКИЙ ПОДХОД К ЭНЕРГОСБЕРЕГАЮЩЕМУ ХЛАДОСНАБЖЕНИЮ СИСТЕМ КОНДИЦИОНИРОВАНИЯ ВОЗДУХА АДАПТАЦИЕЙ К ТЕКУЩИМ КЛИМАТИЧЕСКИМ УСЛОВИЯМ
Authors: Трушляков Євген Іванович
Published: October 2018

The methodological approach was suggested to define a rational heat load of the air conditioning system (ACS) with taking into consideration the current climatic conditions of operation. The proposed approach is based on the hypothesis of sharing the current changeable heat load on the relatively stable share as the basic one for choosing installed (designed) refrigeration capacity of the refrigeration machine, operating with high energy efficiency in nominal or similar modes, and unstable heat load, corresponding to ambient air precooling at changeable current temperatures. To prove the methodological approach to defining a rational heat load of the ACS was carried out the analysis of current values of heat loads of the refrigeration machine ACS during cooling ambient air from its changeable current temperature to the temperature of 10, 15 and 20 ºС . It is shown that due to the different rates of annular refrigeration capacity production increment to cover the current heat loads with increasing the installed refrigeration capacity of the refrigeration machine, caused by the changes in heat load according to current climatic conditions during all the year round, it is necessary to choose a such heat load on the refrigeration machine of ACS (its installed refrigeration capacity), that provides a maximum or similar annular refrigeration capacity production at relatively high rates of its increment. Therein, the value of heat load for ambient air precooling is calculated according to remained principle as the difference between the rational total heat load and its basic relatively stable share. The proposed method is useful for defining a basic installed refrigeration capacity of the refrigeration machine of ACS with the accumulation of excessive (unapplied) refrigeration capacity at lowered current heat loads on ACS and its application for ambient air precooling, that is for covering unstable heat load share on ACS
ИССЛЕДОВАНИЕ ЛОГИСТИКИ УПРАВЛЕНИЯ ПРОИЗВОДСТВОМ ВЫСОКОТЕХНОЛОГИЧЕСКОЙ ПРОДУКЦИИ ВИРТУАЛЬНОГО ПРЕДПРИЯТИЯ
Authors: Федорович Олег Евгеньевич , Сломчинский Олег Викторович , Пуйденко Вадим Алексеевич
Published: October 2018

It is stated and solved the complex task related to the arrangement and management of the virtual enterprise (VE) in the aerospace industry where high-tech innovative products produced. The complex task divided into several stages. At the first stage, the task of building a portfolio of VE orders solved. In order to do this, the state of the high-tech products market is analyzed to identify the competitive products. The alternatives of the order portfolio compared and evaluated considering the costs, timing, and risks of output. The composition of the VE enterprises selected at the second stage of the built portfolio of orders. For this purpose, the enterprises selected according to the principle of subject orientation considering the possible costs associated with the adaptation of the selected enterprises to fulfill the order portfolio. The info-communication links to manage the VE formed at the third stage. The cost and capacity of the communication equipment for transmission of control and technological information within the framework of the VE taken into consideration. The production cycle of the VE formed at the fourth stage considering the logistics requirements. The characteristics of the logistics chain "supply-production-sale" for each enterprise in the composition of the VE taken into consideration. At the fifth stage, the quality management system of the VE production considered. In order to ensure the quality, the corresponding activities that affect not only the quality of the product in the logistics chain but also the whole production processes (both basic and auxiliary) are carried out. At the sixth stage, the logistics processes of VE supplying and marketing optimized. The optimization of supply and marketing processes provides a reduction of product cost as well as the increased competitiveness in the market of high-tech products. The proposed tasks are logically related to each other and aimed at ensuring the competitiveness of domestic machine-building enterprises (aircraft construction, shipbuilding, etc.). In order to solve the proposed complex problem the methods of system analysis, integer optimization, simulation, agent and knowledge-oriented modeling are used. The proposed approach allows to justify the order portfolio, make the organizational structure of the enterprise, build the info-communication interaction between the executors, justify the quality requirements and also to organize the logistics chain of supply, supply, production and marketing of high-tech products, taking into account the terms of fulfilling the order portfolio and optimizing costs that is very important for domestic aircraft building
Concepciones de educadores en formación sobre la autorregulación del aprendizaje y la práctica profesional
Authors: Ivet García Montero , Castellanos Simons Doris
Published: October 2018

El artículo presenta los avances de un proyecto más amplio que se desarrolla en una unidad de la Universidad Pedagógica Nacional, México, con 32 estudiantes de la Licenciatura en Intervención Educativa, con miras a fortalecer la calidad de los procesos de formación profesional y de aprendizaje desde una perspectiva integradora que tome en cuenta factores diversos. En particular, se reportan aquí resultados parciales de una etapa que tuvo como objetivos identificar sus concepciones sobre el proceso de autorregulación y el papel que tiene en la formación profesional, así como conocer sus representaciones acerca de su futura práctica educativa, las exigencias que la impactan y las necesidades formativas propias en el contexto sociocultural actual. El estudio se enmarca en el modelo cualitativo; su diseño corresponde a la investigación acción participativa, cuya consecución posibilitó la participación activa de los estudiantes en las acciones de reflexión, problematización y de búsqueda de solución práctica de sus necesidades. Se emplearon grupos focales, la observación participante, cuestionarios y entrevistas. Los resultados muestran que los estudiantes poseen escasos conocimientos acerca de la autorregulación y de su papel en sus procesos formativos. Se concluye que la importancia de comprender la autorregulación es un proceso complejo, cuya formación se relaciona tanto con procesos psicológicos, como con factores socioculturales y educativos diversos que deben ser desarrollados para promover nuevas competencias de estructuración, contextualización y gestión de los saberes, que los estudiantes necesitan para transformar su realidad y transformarse a sí mismos en su trayecto académico.
Inhibición conductual, memoria de trabajo y planificación en adolescentes entre 12 y 14 años
Authors: Orozco Zevada María Elena , Tellez Bernarda
Published: October 2018

El objetivo del presente estudio fue comparar la ejecución de adolescentes entre los 12 y los 14 años en tres tareas asociadas a funciones ejecutivas: inhibición conductual, memoria de trabajo y planificación. Se trabajó con tres grupos (12, 13 y 14 años) cada uno con 62 participantes. Se empleó la tarea Stop signal para la inhibición conductual, para la memoria de trabajo la tarea N-Back (1,2) y para la planeación la Torre de Londres modificada. Se encontró mayor número de aciertos a los 14 años que a los 12 años en la tarea de inhibición y en la de memoria de trabajo, mientras que en la planificación no hubo diferencias. Estos hallazgos deben considerarse al realizar investigaciones del desarrollo para no agrupar esas edades sólo por un criterio aritmético. Adicionalmente, estos resultados proporcionan información para el diagnóstico e intervención en casos de retrasos en el desarrollo de las funciones evaluadas.
Shallow Gas Features Based on Interpretation of Bottom Profilling Records at Topang Delta, Meranti Regency, Riau Province
Authors: Raharjo Purnomo , Djaja Andrian Willyan , Usman Ediar
Published: October 2018

One of the tasks in conducting a renewable energy research is finding a shallow gas contained commonly in river deltas. The location chosen is in Topang Delta,, Meranti District, Riau Province in 2015. The research was conducted by using sub-bottom profiling (SBP) method. Biogenic gas indications could be observed in the SBP records in the forms of free reflector, acoustic plumes and acoustic blanket. The shallow biogenic gas at research area is trapped in A and B sequences. Sequence A is characterized by plume gas and acoustic blanket, while B-type biogenic gas is showed by free-reflector feature of 10-15 meters depth. Sediment which does not have porocity such as old clay is required environment for anaerobic bacteria as catalyst in the formation of biogenic gas to be evolved. Old clay sediment is potential as a biogenic gas source rock afterwards migrated to a layer of sand as a reservoir rock. Some parts of biogenic gas does not appear to the surface because there have been traped in cap rock in form of young clay sediment.Keywords: Topang Delta, Biogenic Gas, free reflector, acoustic plumes, acoustic blanket Salah satu tugas dalam melakukan penelitian energi terbarukan adalah pecarian gas dangkal yang biasa terdapat di delta-delta sungai. Lokasi yang terpilih adalah di delta TopangÂ  Kabupaten Kepulauan Meranti, Provinsi Riau pada tahun 2015. Penelitian yang dilakukan salah satunya menggunakan metoda sub bottom profilling (SBP). Indikasi gas biogenik tampak dalam rekaman subbottom profilling berupa reflektor bebas pantul, terobosan gas dan selimut akustik. Keterdapatan gas biogenik dangkal di lokasi penelitian terjebak dalam sekuen sedimen A dan B. Sekuen A dicirikan dengan kenampakan berupa terobosan gas dan selimut akustik, sedangkan biogenik gas tipe-B dicirikan dengan kehadiran reflektor bebas pantul dengan ketebalan 10-15 meter. Sedimen yang tidak memiliki porositas seperti lempung tua merupakan lingkungan yang dimungkinkan untuk bakteri anaerobik sebagai katalisator dalam pembentukan gas biogenik. Endapan lempung tua berpotensi sebagai batuan sumber biogenik gas kemudian bermigrasi ke lapisan sedimen pasir sebagai tempat tersimpannya gas biogenik. Sebagian gas biogenik tidak dapat muncul ke permukaan hingga lapisan atas karena terjebak dalam lapisan sedimen penutup berupa lempung muda.Kata Kunci : Delta Topang, Gas Biogenik, bebas pantul, terobosan gas, selimut akustik
Rare Earth Elements Vapor Transport By Fumaroles in the Post Caldera Complex of Weh Island Submarine Volcano, Aceh Province Northern Sumatra
Authors: Kurnio Hananto , Usman Ediar
Published: October 2018

Research found out that fumaroles and solfataras are rare earth element (REE) vapor transport agents in Weh Island submarine volcano – Aceh. Shallow high resolution single channel seismic was used to map the distribution of seafloor fumaroles surrounding the submarine volcano. Samples of REE depositions were taken from Jaboi geothermal field, and mineralization zone at Pria Laot coast; as well as seafloor surrounding active fumaroles by divers.  Rare earth elements (REE) were analysed using ICP – MS (inductively coupled plasma – mass spectrometry) with detection limits ranged from 0.05 to 0.1 ppm (part per million).The central part of Weh submarine volcano is the most active REE deposition. This area is build by normal faults and grabens oriented north – south of open character which acted as channel for hydrothermal fluids reaching seafloor surface.Some REE abundances such as La, Ce, Pr, and Nd due to its location in the central of hydrothermal activity. This proximity explains such abundances of this andesitic component sample of agglomerate.  Keywords: REE, vapor transport, fumaroles, Weh Island, Aceh.Penelitian mendapatkan bahwa fumarole dan solfatara adalah sebagai agen transportasi uap Logam Tanah Jarang (LTJ) di gunungapi bawah laut Pulau Weh – Aceh, Provinsi Nanggroe Aceh Darussalam (NAD). Seismik saluran tunggal dangkal resolusi tinggi digunakan untuk memetakan fumarole dasarlaut di sekitar gunungapi bawah laut tersebut.Bagian tengah gunungapi bawah laut Pulau Weh merupakan area paling aktif pengendapan LTJ. Bagian ini dibangun oleh sesar-sesar normal dan graben berorientasi utara – selatan dengan karakter terbuka sebagai saluran untuk fluida hidrotermal mencapai permukaan dasar laut.Kelimpahan unsur tanah jarang La, Ce, Pr dan Nd dikarenakan posisinya pada pusat aktivitas hidrotermal. Kedekatan dengan pusat hidrotermal ini menjelaskan kelimpahan REE dari contoh komponen andesitic yang diambil dari aglomerat ini.Kata kunci: UTJ (Unsur Tanah Jarang), transportasi uap, fumarol, PulauWeh, Aceh.
The Identification of Land Subsidance by Levelling Measurement and GPR Data at Tanjung Emas Harbour, Semarang
Authors: Raharjo Purnomo , Yosi Mira
Published: October 2018

Recently, the main problem in Semarang City is flood. This area has low relief that consists of coastal alluvial deposits, swamp and marine sediments. The coastline is characterized by muddy, sandy, and rocky coasts, and mangrove coast. Ground Penetrating Radar (GPR) records, show that subsurface geological condition of northern part of Semarang is coastal alluvial deposit and in the south is volcanic rocks. The aims of this this research is to determine land subsidence by levelling measurement in 2005 in Tanjung Emas Harbour area built on 1995. During ten years, there are various land subsidance in this area: in Coaster Street (21 – 41 cm), container wharf (62 – 94 cm), north breakwater (64 – 79 cm), west breakwater (74 – 140 cm), east groin (76 – 89 cm), and stacking area ( 77 – 109 cm). According to this research, it is concluded that one reason causes of flooding in this area is land subsidence.Keywords : flood, land subsidence, levelling, Tanjung Emas Harbour, Semarang Permasalahan yang berkembang di Kota Semarang saat ini adalah terjadinya banjir. Kawasan ini berelief rendah yang disusun oleh endapan aluvial pantai, rawa dan sedimen laut. Karakteristik garis pantai dicirikan oleh pantai berlumpur, berpasir dan berbatuan, serta pantai berbakau. Rekaman Ground Penetrating Radar (GPR) menunjukkan kondisi geologi bawah permukaan utara kota Semarang merupakan endapan aluvial pantai dan bagian selatan disusun oleh batuan vulkanik. Tujuan penelitian ini adalah untuk mengetahui kondisi penurunan tanah melalui pengukuran sifatdatar yang dilakukan pada tahun 2005, di kawasan Pelabuhan Tanjung Emas yang dibangun pada tahun 1995. Dalam kurun waktu 10 tahun, diketahui bahwa terdapat variasi penurunan tanah di kawasan ini: ruas jalan Coaster (21-41 cm), di kawasan dermaga peti kemas (62-94 cm), pemecah gelombang sebelah utara (64-79 cm), pemecah gelombang sebelah barat (74-140 cm), penahan gelombang sebelah timur (76-89 cm), dan pelataran peti kemas (77-109 cm). Berdasarkan penelitian ini, maka dapat disimpulkan bahwa salahsatu penyebab banjir di kawasan ini adalah akibat penurunan tanah.Kata Kunci : banjir, penurunan tanah, sipatdatar, Pelabuhan Tanjung Emas, Semarang
Seismic Facies of Pleistocene–Holocene Channel-fill Deposits in Bawean Island and Adjacent Waters, Southeast Java Sea
Authors: Albab Ali , Aryanto Noor Cahyo Dwi
Published: October 2018

The late Pleistocene-Holocene stratigraphic architecture of the Bawean Island and surrounding waters, southeast Java Sea has been analyzed by using sparker seismic profiles. Geological interpretation of these seismic profiles revealed the widespread distribution of paleochannels with different shape and size in the present-day Java Sea. Two channel types can be distinguished based on its morphology: U-shaped channels in the western part and V-shaped channels in the eastern part. The stratigraphic successions were grouped into two major seismic units separated by different seismic boundaries. Characters of marine and fluvial deposits were determined based on seismic boundaries and internal reflectors. Three seismic facies can be identified within late Pleistocene – Holocene incised channel fills associated with SB2. The internal structure of incised-channels consist of chaotic reflector at the bottom, covered by parallel–sub parallel and almost reflection-free indicating the homogenous sediment deposited during the succession.Keywords : Pleistocene-Holocene channel fills, sparker seismic profiles, seismic boundaries, incised–channel, Java Sea. Rekaman seismik sparker digunakan untuk menganalisis endapan stratigrafi berumur Plistosen Akhir–Holosen di Perairan Pulau Bawean dan sekitarnya. Berdasarkan interpretasi geologi dari rekaman seismik tersebut teridentifikasi sebaran alur purba yang berbeda bentuk dan ukuran dengan kondisi Laut Jawa sekarang. Berdasarkan morfologinya, dua tipe alur purba yang terdentifikasi adalah alur purba berbentuk U di bagian barat dan berbentuk V yang terbentuk di bagian timur daerah penelitian. Suksesi stratigrafi kemudian dibedakan menjadi dua grup unit seismik utama yang dibatasi oleh perbedaan batas seismik, yaitu endapan asal darat dan laut yang ditentukan berdasarkan batas sikuen dan reflektor internal. Pada unit Pleistosen–Holosen teridentifikasi tiga tipe fasies seismik yang berkorelasi pada batas sikuen SB2. Struktur internal alur purba yang tertoreh terdiri dari reflektor kaotik yang di bagian bawah, kemudian ditutupi oleh reflektor paralel - sub paralel sampai hampir bebas refleksi yang mengindikasikan terendapkannya sedimen homogen selama suksesi tersebut.Kata kunci : Pengisi alur Plistosen - Holosen, penampang seismik sparker, batas seismik, alur tertoreh, Laut Jawa.
KECEPATAN PENGANGKATAN PULAU BUTON DAN JEJAK PERUBAHANMUKA AIR LAUT DI ZAMAN KUARTER
Authors: Astjario Prijantono , Siregar D.A.
Published: October 2018

Beberapa indikasi menunjukan adanya jejak muka laut cukup tinggi di zaman Kuarter, ketinggiannya mencapai Â±250 meter diatas muka laut masa kini, ditemukan pada kawasan pantai Tira hingga Tanjung Labokeh, Buton bagian selatan. Jejak tersebut terrekam pada permukaan terumbu karang yang membentuk undak laut di kawasan pantai Buton Selatan. Tujuh buah hasil pentarikhkan Radiokarbon memberikan tiga contoh berumur 1500 hingga 3000 tahun dan contoh terumbu karang lainnya berumur lebih tua dari 40.000 tahun sebelum saat ini. Runtunan data Radiokarbon secara garis besar menunjukan kesesuaian dengan perubahan muka laut pada zaman Kuarter yang telah di prakirakan oleh teori astronomi perubahan cuaca masa lalu. Jika dibandingkan data Radiokarvbon dengan data urutan undak laut menunjukan bahwa rata-rata aktivitas tektonik pengangkatan dikawasan pantai Tira hingga Tanjung Labokeh adalah 0,7 = 0,8 mm/tahun. Pengangkatan rata-rata Pulau Buton tampak lebih cepat dari Pulau Muna akibat adanya sesar aktiv diantara kedua pulau tersebut.

Several indicators of a slightly higher Quaternary sea-level, reaching about Â± 250 meters above the present situation have been found along the coastas of Tira to Cape Labokeh. South Buton. They are corrals in growth position on the surface of reef platform of South Buton. Seven Radiocarbbon datings have provided ages of three samplewsa are 1500 to 3000 and the other four samples are more older than 40.000 years BP. The Radiochronological data are thus broadly consistent with the timing of sea-level fluctuations predicted by the astronomical theory of paleoclimates. Comparision with the data from terraces sequences and from Radiocarbon dating records indicates that the average tectonic uplift rate at Tira and Cape Labokeh, South Buton is on the order of 0,7 â€“ 0.8 mm / years. The uplift rate of Buton is more faster than Muna because of the active fault in between.
TINJAUAN GEOLOGI LANDAS KONTINEN INDONESIA DI LUAR 200 MIL LAUT SEBELAH SELATAN PERAIRAN PULAU SUMBA
Authors: Astjario Prijantono , Silalahi Imelda R.
Published: October 2018

Indonesia berkehendak untuk mengeksplorasi dan mengeksploitasi potensi sumber daya alam di Zona Landas Kontinen di luar 200 mil laut dengan mengajukan batas Landas Kontinennya sesuai dengan ketentuan yang telah ditetapkan dalam United Nations Convention on the Law of the Sea (UNCLOS III, 1982) hingga jarak 350 mil laut. Hasil studi data geologi dan geofisika menunjukkan bahwa Indonesia memiliki prospek untuk melaksanakan submisi landas kontinen di luar 200 mil di tiga lokasi, dalam hal ini salah satunya adalah di sebelah selatan perairan Pulau Sumba. Tinjauan geologi ini dilaksanakan dalam upaya menggali dan menghimpun data serta informasi yang berkaitan dengan hak kedaulatan Indonesia atas potensi sumberdaya alam dari Landas Kontinen Indonesia di luar 200 mil sebelah selatan perairan Pulau Sumba. Adapun tujuan dari tinjauan ini adalah untuk pengembangan data dan informasi kelautan untuk pemanfaatkan potensi sumberdaya alam dari Landas Kontinen Indonesia di luar perairan 200 mil sebelah selatan Pulau Sumba. Data geologi dan geofisika di daerah tinjauan menunjukkan ketebalan sedimen yang tipis yaitu antara 1â€“ 1,8 %. Tinjauan geologi ini memberikan pula dugaan adanya cekungan yang memiliki ketebalan sedimen yang cukup tebal yang dapat ditelusuri lebih lanjut sesuai dengan pola batimetri perairan selatan Sumba.

Kata kunci: Landas kontinen, 200 mil laut, submisi, UNCLOS, sedimen.

Indonesia willing to explore and exploit the natural resources in Continental Shelf Zone beyond 200 nautical miles to the limit of its continental shelf in accordance with the provisions stipulated in the United Nations Convention on the Law of the Sea (UNCLOS III, 1982) up to a distance of 350 nautical miles. The result of geological and geophysical data study shows that Indonesia has the prospect to implement submission of the continental shelf beyond 200 miles in three locations, where one of which is in the southern waters of Sumba Island. Geological review was conducted in order to explore and collect data and information relating to the rights of Indonesian sovereignty over natural resources of the Indonesian Continental Shelf beyond 200 miles south of Sumba Island waters. The purpose of this review is for the development of marine data and information for the exploitation of natural resources of the Continental Shelf beyond Indonesian waters 200 miles south of the island of Sumba. Geological and geophysical data from the study area shows that the sediment thickness is between 1 to 1.8%. This study also provides the present of a basin with the sediment thickness that can be traced further in accordance with the pattern of bathymetric pattern of south Sumba waters.

Keywords: Continental shelf, 200 nautical miles, submissions, UNCLOS, sediments.
MODEL EMPIRIS HARI TENANG VARIASI MEDAN GEOMAGNET DI STASIUN GEOMAGNET TONDANO MANADO
Authors: Arifin Lukman , Maspupu John
Published: October 2018

Penentuan model empiris hari tenang variasi medan geomagnet dikonstruksi berdasarkan data geomagnet dari stasiun geomagnet (SG) Badan Meteorologi Klimatologi dan Geofisika (BMKG) Tondano, Manado. Hari tenang variasi medan geomagnet dinyatakan sebagai fungsi dari keempat komponen atau variabel yang mempengaruhinya yaitu: aktivitas matahari SA (solar activity), hari dalam setahun DOY (date of year), usia bulan LA (lunar age) dan waktu lokal LT (local time). Dalam bentuk matematis ditulis sebagai, EMQD ( SA, DOY, LA, LT ) = f(SA). g(DOY). h(LA). m(LT). Model empiris yang didasarkan pada fungsi kecocokan ini terdiri dari 270 bentuk ekspresi matematik. Sedangkan bentuk-bentuk ekspresi matematik ini juga mencakup proses-proses non-linier yang tak dapat diabaikan dalam model empiris hari tenang variasi medan geomagnet tersebut. Model empiris ini dapat ditiru atau dikonstruksi kembali pada suatu selang waktu yang relatif panjang (misalnya satu siklus matahari), asalkan kondisi geomagnet selalu berada dalam keadaan tenang. Kontribusi dari model empiris hari tenang ini akan memberikan informasi tentang gangguan geomagnet yang ada di stasiun geomagnet Tondano (Nilai Gangguan geomagnet = Nilai variasi medan geomagnet yang terukur â€“ Nilai model empiris hari tenang). Dengan demikian model ini akan memberikan informasi gangguan geomagnet untuk operasi survey geomagnet disekitar stasiun geomagnet Tondano, Manado.

Kata kunci : Model empiris, Hari tenang, Variasi medan geomagnet.

The determination an empirical model of the quiet daily geomagnetic field variation that is constructed based on geomagnetic data from Tondano, Manado station geomagnetic This quiet daily of geomagnetic field variation was described as a function of four variables that its influence, these are solar activity (SA), day of year (DOY), lunar age (LA) and local time (LT). In the mathematically writes: EMQD ( SA, DOY, LA, LT ) = f(SA). g(DOY). h(LA). m(LT). The empirical model based on this fitting function consist of 270 coefficients which included in expression form of mathematic. While, expression form of this mathematic also comprise nonlinear processes which can not minimized in the empirical model of the quiet daily geomagnetic field variation. This empirical model can be reconstructed on the time interval that is long relative (for example one solar cycle). Provided that, under geomagnetic quiet conditions. Contribution of this empirical model of the quiet daily variation is can give information about the existence of geomagnetic disturbance at Tondano (value of geomagnetic disturbance equal value of measurable geomagnetic field variation minus value of empirical model of the quiet daily variation). Thus, information about the existence of this geomagnetic disturbance very useful for necessity geomagnetic survey at Tondano, Manado geomagnetic station.

Keywords: Empirical model, the quiet daily variation, geomagnetic field variation.
PENGARUH CO2 TERHADAP LAJU PERTUMBUHAN DAN KANDUNGAN LIPID BOTRYOCOCCUS BRAUNII PADA MEDIA AIR LAUT
Authors: Wargadalam Verina J. , Saadudin Edi , Fitri Silvy R.
Published: October 2018

Mikroalga sebagai salah satu opsi penyedia sumber bahan bakar nabati telah banyak diteliti. Salah satu yang perlu diperhatikan untuk keberlajutannya adalah sangat besarnya kebutuhan air yang harus disediakan dalam proses budidaya. Untuk menghindari kompetisi kebutuhan air tersebut, budidaya mikroalga dalam media air laut/salin dapat dipertimbangkan. Penelitian ini mempelajari pengaruh penambahan CO2 terhadap laju pertumbuhan dan kandungan lipid mikroalga Botryococcus braunii KÃ¼tzing strain NIES-836 yang dibudidaya dalam media salin dengan sistem terbuka. Penambahan CO2 sebesar 2% hingga 20% meningkatkan laju pertumbuhan spesifik, dengan nilai tertinggi dicapai pada penambahan 2% CO2, yaitu 0,53/hari, dan laju pertumbuhan mulai menurun signifikan pada penambahan 20% CO2. Produksi lipid tertinggi yang dapat dipulihkan juga dicapai pada penambahan 2% CO2, yaitu sebesar 0,34 g/L. Kandungan asam lemak dalam total lipid diketahui hanya mencapai 25% dengan komposisi utamanya Metil Palmitat, Metil Palmitoleat dan Metil Oleat.Kata kunci: Botryococcus braunii, CO2, laju pertumbuhan, lipid, air laut Microalgae as an alternative resource for biofuel have attracted many research works, and one of the concerns is its sustainability due to the need of a huge amount of water in the cultivation process. To avoid such water competition, cultivation of microalgae in media of saline/sea water can be considered. In this works, the effects of CO2 on the growth and lipid accumulation of Botryococcus braunii KÃ¼tzing strain NIES-836 in sea water/saline media and open system have been studied. The CO2 additions of 2% to 20% were found to increase the specific growth rate. The highest value was reached at 2% CO2 addition, i.e.: 0.53/day, whereas, the specific growth rate started to decrease significantly at 20% CO2 addition. The highest lipid production that could be recovered was 0.34 g/L, and that was observed at 2% CO2 addition. The fatty acid content in the total lipid was 25%, mainly consists of Methyl Palmitate, Methyl Palmitoleate, and Methyl Oleate. Keywords: Botryococcus braunii, CO2, growth rate, lipid, sea water
PENENTUAN LOKASI TURBIN PEMBANGKIT LISTRIK TENAGA ARUS LAUT SKALA KECIL DI PERAIRAN SELAT LIRUNG, TALAUD, SULAWESI UTARA
Authors: Rachmat Beben , Ilahude Delyuzar
Published: October 2018

Selat Lirung adalah selat yang terletak antara Pulau Salibabu dan Pulau Karakelong, Kepulauan Talaud. Penelitian potensi energi arus laut telah dilakukan di lokasi ini, untuk mengkaji kemungkinan dikembangkannya Pembangkit Listrik Tenaga Arus Laut (PLTAL) skala kecil (2 kW) dengan model turbin sumbu vertikal. Salah satu tahapan dalam implementasi PLTAL skala kecil adalah penentuan lokasi penempatan turbin. Beberapa kriteria teknis yang dipersyaratkan harus dipenuhi pada tahapan ini. Untuk maksud tersebut dilakukan kajian awal dengan melakukan analisis data kedalaman laut, Sea Bottom Profiling (SBP), arus bergerak, arus insitu, pasang surut, dan meteorologi. Data tersebut direpresentasikan dalam data kecepatan arus laut, morfologi dasar laut, kedalaman laut, durasi waktu kecepatan arus kuat, jarak terhadap garis pantai, dan pengaruh gelombang laut. Berdasarkan hasil analisis data tersebut diperoleh 2 (dua) lokasi yang paling representatif. Lokasi pertama di alur antara P. Sara Besar dengan Sara Kecil pada kedalaman laut sekitar 25 m dengan kecepatan arus maksimum sebesar 1.0 m/det-1.75 m/det. Sedangkan lokasi kedua di alur antara P. Sara Besar dengan P. Salibabu pada kedalaman laut antara 25 m-35 m dengan kecepatan arus maksimum sebesar 1.0 m/det-1.3 m/det. Kata kunci Tenaga arus laut, turbin, kecepatan arus, morfologi dasar laut, kedalaman laut The Lirung Strait is a strait located between the Salibabu Island and Karakelong Island, Talaud. Energy potential of marine current research has been done in this location, to examine the possibility of the development of Marine Current Power Plant (MCPP) small scale (2 kW). One of the stages in the implementation of MCPP small scale is determining the location of the turbines placement. Some technical criteria required to be met at this stage. For the purpose of initial studies to perform data analysis depth of the sea, Sea Bottom Profiling (SBP), the current is moving, insitu currents, tides, and meteorology. That data are represented within the sea current speed, the morphology of the seabed, ocean depth, duration of strong current speed, distance to the coastline,and the influence of waves. Based on the results of the analysis of the data obtained two (2) most representative locations. The first location is in the groove between the Sara Besar Island with Sara Kecil Island at the depths between 25 m with the maximum current speed of 1.0 m/s-1.75 m/s. The second location is in the groove between the Sara Besar Island with Salibabu Island at the depths between 25 m - 35 m with the maximum current speed of 1.0 m/s-1.3 m/s. Keywords: Power of marine currents, turbines, current speed, seabed morphology, ocean depths
KETERDAPATAN MINERAL DAN UNSUR JARANG PADA SEDIMEN PANTAI DAN PERMUKAAN DASAR LAUT DI PERAIRAN SELAT PULAU BATAM DAN PULAU BINTAN
Authors: Setiady Deny , Faturachman Faturachman
Published: October 2018

Sedimen dasar laut Selat Batam - Bintan tersusun oleh pasir kerikilan yang terdapat di sepanjang pantai dan lepas pantai P. Batam, dan kerikil pasiran yang dijumpai di sepanjang dekat pantai P. Bintan. Pasir menempati bagian tengah daerah selidikan. Sebaran sedimen tersebut menunjukkan bahwa sumber sedimen berasal dari Pulau Batam dan P. Bintan, dengan ukuran butir menghalus ke arah lepas pantai. Hasil analisa mineral berat menunjukkan bahwa terdapat 12 jenis mineral berat di daerah selidikan Magnetit, Kasiterit, Zirkon, Monasit, Hornblenda, Tourmalin, Pirit, Ilmenit, Hematit, leokosen, augit, diopsid. Mineral magnetit dominan terdapat pada sedimen Pasir lanauan (BT-34), dan pasir (BT-11), sedangkan mineral kasiterit dominan terdapat pada sedimen pasir kerikilan (BT-4) dan pasir lanauan (BT-34). Analisis kandungan unsur jarang sepanjang pantai barat P. Batam menunjukkan bahwa kandungan Barium (561 ppm) lebih tinggi dibandingkan unsur Sn (16 ppm), Sr (42 ppm), Nb (13 ppm) dan Zn (186 ppm). Sedangkan di pantai P. Bintan Timur Kandungan dijumpai tinggi unsur Ba (761 ppm), Nb (480 ppm) Sr (200ppm) dan Zr (300 ppm) pada contoh Pbn-1.
POLA SEBARAN SEDIMEN MENGANDUNG GAS BERDASARKAN INTERPRETASI SEISMIK PANTUL DANGKAL DI PERAIRAN UJUNG PANGKAH, GRESIK, JAWA TIMUR
Authors: Lugra Wayan , Wahib Abdul , Astawa Nyoman
Published: October 2018

Dari hasil interpretasi seismik di daerah penelitian dapat dikenali 4 runtunan yaitu runtunan A, B C dan Runtunan D serta sedimen mengandung gas (gas charged sediment) dengan konfigurasi rekaman adalah bebas pantul (free reflection). Pola sebaran sedimen mengandung gas menempati 2 zona yaitu zona I di sebelah selatan Tanjung Wedora dan zona II sebelah utara Tanjung Wedora sampai Ujung Pangkah.
Sebaran sedimen mengandung gas hanya dapat dikenali secara lateral, sedangkan secara vertikal sangat sulit untuk dikenali. Keterdapatan sedimen mengandung gas diperkirakan menempati runtunan C yang tersebar secara merata di daerah telitian.

Shallow seismic interpretation indicate that the stratigraphy of , the study area can be divided into 4 sequences namely sequence A, B, C and D, In the study area, the gas charged sediments also were indicated. The spreading of gas charged sediment occupied at two zones those are zone one in the south off Tanjung Wedora and zone two in the north off Tanjung Wedora extend to Ujung Pangkah.
Spreading trends of the gas charged sediment can be recognized laterally, while vertically is quit dificult. While the existing of gas charged sediment is suggested in sequence C which is spreading on the whole of study area.