bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGARUH WAKTU AGING TERHADAP SIFAT HIDROFOBISITAS SILIKA XEROGEL TERMOFIDIFIKASI TRIMETILKLOROSILAN (EFFECT OF AGING TIME ON THE HYDROPHOBICITY OF SYNTHESIZED TRIMETHYLCHLOROSILANE-MODIFIED SILICA XEROGE)
Authors: Wahyudi Pendi , Alimuddin Andi Hairil , Shofiyani Anis 
Published: March 2022

Silica xerogel is a multi-functional material that is useful in many industrial applications. In this research, we synthesized surface-modified silica xerogel and studied the effect of aging time, i.e., 0, 3, 6, 12, and 18 hours to the hydrophobicity of the synthesized material. The synthesis was conducted by the sol-gel method using sodium silicate precursors and a citric acid catalyst. Meanwhile, the surface modification was carried out through the silylation reaction using trimethylchlorosilane (TMCS) reagent. The resulting materials were characterized using infrared spectrophotometry (FTIR) and X-ray diffraction (XRD) methods. Hydrophobicity was measured by the contact angle formed by the water droplet with the xerogel surface and the spreading time of the droplet to be dispersed entirely on the surface. The silica xerogel produced at all aging time variations has an amorphous phase, characterized by 2θ = 22-26o of the XRD pattern. Si-CH3 and C-H vibrations at 848 cm-1 and 2962 cm-1 present in the FTIR spectrumconfirm the success of surface modification. The increasing aging time enhances the contact angle and spreading time of water droplets on xerogels, viz., 130o to 135o,and 3h 10min to 3h 28 min, respectively. Thus, the xerogels produced by this research are hydrophobic.
KARAKTERISASI KOMPONEN DESTILAT MINYAK SEREH WANGI (Cymbopogon nardus l. Rendle) DARI KECAMATAN KUALA BEHE KABUPATEN LANDAK
Authors: Omarta Omarta , Jayuska Afghani , Silalahi Imelda Hotmarisi 
Published: March 2022

Tanaman Sereh Wangi (Cymbopogon nardus l. Rendle) merupakan tanaman dari famili Poaceae yang telah lama dikenal sebagai penghasil minyak atsiri. Pemanfaatan minyak atsiri sereh wangi telah banyak diteliti sebagai pestisida nabati. Penelitian ini bertujuan untuk mengetahui persen rendemen minyak sereh wangi dan mengetahui pengaruh variasi suhu dan waktu fraksinasi terhadap komposisi senyawa yang terkandung dalam minyak sereh wangi. Minyak sereh wangi yang digunakan berwarna kuning pucat jernih dengan dengan berat jenis 0,8662 gram. Hasil identifikasi GC-MS menunjukkan bahwa minyak sereh wangi sebelum didestilasi mengandung 10 puncak senyawa dengan 3 puncak senyawa mayor berdasarkan area dominan yaitu alpha-pinene 79,07%; beta-ocimene 8,80%; dan sitronelal 6,42 %. Hasil fraksi minyak setelah didestilasi yaitu pada destilat pertama luas area alpha-pinene 90,38%; beta-ocimene 5,42%; dan sitronelal 0,47%. Destilat kedua alpha-pinene 88,11%; beta-ocimene 6,88%; dan sitronelal 0,63%. Destilat ketiga alpha-pinene 84,37%; beta-ocimene 9,40%; dan sitronelal 0,98%
PLAN DE NEGOCIOS PARA LA EXPORTACIÓN DE CAFÉ A EUROPA DURANTE LA PANDEMIA EN LA COOPERATIVA APROCASSI – SAN IGNACIO
Authors: Huamán silva María Irene 
Published: March 2022

La presente investigación surge por las dificultades que se presentaron en la cosecha de café y el proceso de exportación en la Cooperativa de Servicios Múltiples Aprocassi durante la cuarentena que estableció el Gobierno Central en el 2020 para hacer frente a la Covid-19.
Los directivos y socios de la organización indicaron que pese a todos los inconvenientes nunca dejaron de exportar. No obstante, como todas las instituciones públicas y privadas, no se encontraron preparados cuando se decretó el aislamiento social obligatorio a nivel nacional. En ese sentido, lo que se busca es crear un plan de negocios de exportación, que le sirva a Aprocassi como una guia durante el tiempo que dure la pandemia y les permita estar preparados en esta nueva normalidad y ante las secuelas que dejará consigo a la Covid-19 cuando se vacune a la mayor parte de la población.
CONCIENCIA TURÍSTICA PARA FORTALECER LA IDENTIDAD CULTURAL EN LOS POBLADORES DEL DISTRITO MANUEL ANTONIO MESONES MURO – FERREÑAFE
Authors: Córdova Tafur Bella Milagros 
Published: March 2022

La presente investigación se desarrolló con la finalidad de fortalecer la identidad cultural en los pobladores del Distrito Manuel Antonio Mesones Muro- Ferreñafe, se observó la escases de conocimiento e interés de su identidad cultural no fortalecida., más que todo en generaciones jovenes que se estan perdiendo. Se planteó como objetivo principal, Proponer un programa de conciencia turística para fortalecer la identidad cultural en los pobladores del Distrito; de acuerdo al propósito y problemática de la investigación, se utilizó una investigación de tipo Descriptiva-Propositiva, y a su vez un diseño No Experimental – Transversal, con un enfoque cuantitativo. Para la recolección de información se empleó la técnica de la encuesta y como instrumento el cuestionario, siendo aplicado a una muestra de 369 pobladores, de acuerdo a la base de datos de INEI (2017) ,conformado de 17 preguntas con la escala de Likert, llegando a determinar que el nivel de identidad cultural., se encuentra con un nivel medio de 57.18% con tendencia baja de 26.56%, por lo que se tendría que trabajar en esta variable. Llegando a la conclusión, de que las dos variables se han analizado y se hallaron fallas en la identidad cultural como falta de conocimientos, valores y temas de turismo que se podrían prevenir para garantizar un mejor desarrollo de la misma. Motivo por el cual se propone un programa de conciencia turística.
LA DOGMÁTICA JURÍDICO PENAL
Authors: Rodríguez Medina José Luis , Torrejon Alva Jheisy Loydith 
Published: March 2022

El presente ensayo propone una respuesta a las aspectos ambiguos en los caracteres conceptuales, históricos y metódicos de esta afamada ciencia jurídica penal, teniendo en consideración que de forma aquiescente e instituida, la dogmática jurídica penal y su determinación exegética de los dispositivos pragmáticos penales en su concepción de otrora, en la simbiosis mutual de los derechos y sus restricciones, ha dejado de ser una mera institución de extensiones sintéticas y se ha transformado en una herramienta jurídica auténtica que está orientada a la hermenéutica, sistematización, desarrollo de los cánones normativos, las convicciones y juicios de naturaleza científica en la esfera del derecho penal, todo esto, con la concepción teleológica de proporcionar seguridad jurídica en el ordenamiento normativo, en el paradigma de un Estado constitucional de derecho. Esta ciencia jurídica, plantea cuestiones relativamente complejas, tanto en su evolución histórica, su contenido, sus métodos y su proyección exegética en el campo de la teoría del delito y los axiomas punitivos. Aunado a esto está el hecho de que la dogmática aporta a la coherencia en la justificación interior y exterior de las sentencias judiciales, más allá del costo que tiene la realizar la búsqueda de los fallos judiciales validadas en derecho; es en merito a esto que, a fin de tener una clara percepción y entendimiento de esta ciencia, resulta necesario hacer el presente ensayo a fin de dilucidar estas cuestiones de carácter sustancial para el campo del derecho, tomando en consideración los estudios a posteriori ya pregonados en el campo del derecho.
FACTORES QUE INCIDEN EN LA DESERCIÓN UNIVERSITARIA
Authors: Uriol Castillo Gaudy Teresa , Mego Sánchez Betsy Anilú 
Published: March 2022

El estudio tuvo como objetivo determinar la principal causa que incide en la deserción universitaria, identificando aquellos factores que promueven la deserción estudiantil, además de la ponderación de estos, vinculando de manera trasversal como un indicador incide en otro y estos en su conjunto al momento de dejar las aulas. El estudio responde a un enfoque cuantitativo de tipo descriptivo – no experimental; la técnica aplicada fue la encuesta, con un cuestionario de 17 preguntas como instrumento. La muestra fue de 77 estudiantes universitarios. La investigación concluye identificando como fuerza predominante en la deserción de los estudiantes al factor socioeconómico, justificado en el 58% de universitarios que se apartaron de las aulas, fue como respuesta a limitaciones económicas, relacionado con el 61% de estudiantes que autofinancian sus estudios, y solo el 39% cuentan con apoyo de algún familiar, excluyendo en términos ponderativos a los factores académicos e institucionales.
Pengaruh Metode Bercerita Menggunakan Boneka Tangan terhadap Perkembangan Emosi Usia 5-6 Tahun
Authors: Insani Aulia 
Published: March 2022

AbstractThis research is based on the background that the importance of emotional skills in TK Aisyiyah 46 Surabaya at the age of 5-6 years. Initial observations were made during the language learning process using puppet media, when children were asked to come forward to retell the child did not want to do it, there were some children who came forward and cried, there were also children who ran when they were appointed to go forward. The purpose of this study was to improve emotional abilities through the cheerful method using hand puppets. The research design used a pre-experimental one shot case study. The research subjects were 25 children aged 5-6 years, in this study using observation and documentation data collection techniques. Data analysis used the T test with the help of SPSS 20. From the results of the above calculations carried out on Group B students in Aisyiyah Kindergarten 46 Surabaya by conducting a pretest and posttest with the use of hand puppets it was concluded that, sig 0.000 <0.05 then Ha was accepted so there were differences in emotional development using hand puppets through the storytelling method. Based on the data collected and the results of the calculation of the data for each treatment, it can be seen that there is an increase in emotional development through storytelling using hand puppets.Keywords: Children, telling stories, hand puppets, emotional development AbstrakPenelitian ini didasari oleh latar belakang bahawa pentingnya kemasmpuan emosi di TK Aisyiyah 46 Surabaya pada usia 5-6 tahun. Observasi awal dilakukan saat proses pembelajaran bahasa menggunakan media boneka, saat anak diminta maju kedepan untuk menceritakan kembali anak tidak mau melaksanakannya, ada beberapa anak maju dan menangis, ada pula anak yang berlari saat ditunjuk untuk maju. Tujuan dari penelitian ini adalah untuk meningkatkan kemampuan emosi melalui metode berceria menggunakan boneka tangan. Desain penelitian menggunakan pre eksperimen one shot case study. Subjek penelitianya adalah anak dengan usia 5-6 tahun sebanyak 25 anak, dalam penelitian ini menggunakan tenik penggumpulan data observasi dan dokumentasi.. Analisis data menggunakan uji T dengan bantuan SPSS 20. Dari hasil perhitungan diatas yang dilakukan terhadap peserta didik Kelompok B di TK Aisyiyah 46 Surabaya dengan melakukan pretest dan postes dengan perlakuan penggunaan Boneka tangan disimpulkan bahwa, sig 0.000<0.05 maka Ha diterima jadi ada perbedaan perkembangan emosi menggunakan boneka tangan melalui metode bercerita. Berdasarkan data yang terkumpul serta hasil perhitungan data setiap perlakuan dapat menunjukan bahwa ada peningkatan dalam perkembangan emosi melalui bercerita menggunakan boneka tangan.Kata kunci: Anak, bercerita, boneka tangan, perkembangan emosi
Analisis Pembiasaan Berbahasa Terhadap Perkembangan Bahasa Anak Usia Dini
Authors: Nafiah Qotrun Nada , Maemonah Maemonah 
Published: March 2022

AbstractRegional languages are cultural heritage that must be preserved. In the midst of such rapid developments, the habit of using Javanese language is an alternative to maintain the sustainability of regional culture. It's not surprising that many parents get used to the Javanese language to communicate with their children, both Javanese as the main language, or it is deliberately used for children, because getting children to use Javanese, especially the ability to use Javanese manners is easier if you get used to it from an early age. This study aims to analyze Javanese language habituation towards early childhood language development through literature study. The sources of this research are journals and books related to the theme. From this research, it can be concluded that Javanese language habituation is included in the scope of bilingualism which according to previous research will slow children's language development. one of the languages that the child learns will be weak because the child is dominant in the language he encounters more often.Keywords: Javanese language, early childhood, language development. AbstrakBahasa daerah merupakan warisan budaya yang harus dijaga eksistensinya. Di tengah perkembangan zaman yang begitu pesat, pembiasaan berbahasa jawa menjadi salah satu alternatif untuk menjaga keberlangsungannya budaya daerah. Tidak heran banyak orang tua yang membiasakan bahasa jawa untuk berkomunikasi dengan anak, baik bahasa jawa sebagai bahasa utama, maupun memang sengaja dibiasakan untuk anak, karena membiasakan anak menggunakan bahasa jawa terutama kemampuan menggunakan bahasa jawa krama lebih mudah apabila dibiasakan sejak dini. Penelitian ini bertujuan menganalisis pembiasaan berbahasa jawa terhadap perkembangan bahasa anak usia dini melalui studi literatur. Adapun metode penelitian yang digunakan dalam penelitian ini adalah kajian pustaka atau library research, yaitu penelitian yang bersumber dari jurnal dan buku yang terkait dengan tema. Literatur yang ditemukan kemudian digunakan untuk mengisi celah pada penelitian sebelumnya. Dari penelitian ini dapat diketahui bahwasannya pembiasaan berbahasa jawa termasuk dalam lingkup bilingual yang menurut penelitian terdahulu akan memperlambat perkembangan bahasa anak. salah satu bahasa yang dipelajari anak akan lemah karena anak dominan terhadap bahasa yang lebih sering ia temui.Kata kunci: Bahasa Jawa, anak usia dini, perkembangan bahasa.
Influence of Fiber Hybridization on Strength and Toughness of RC Beams
Authors: Meera Sahib Mohammed Muneer , Rasia Salim Surumi 
Published: March 2022

This paper focuses on the experimental investigation designed to study the behavior of hybrid fiber-reinforced concrete (HFRC) beams under flexure and impact loading. The addition of fibers to concrete can improve a number of its properties. For optimal response, different types of fibers may be suitably combined to produce HFRC. Optimized combinations of different fiber types in concrete can produce a composite with better engineering properties than that with only one type. The study compared the mechanical properties of fresh and hardened HFRC, Steel Fiber Reinforced Concrete (SFRC), and conventional concrete to arrive at the optimum fiber content for improved behavior of concrete by testing 135 specimens. Subsequently, the behavior of steel fiber-reinforced concrete beams was investigated with and without fiber hybridization under flexural and impact loading, followed by a comparison of the results. Fiber hybridization was achieved by developing concrete containing a combination of steel and polypropylene fibers. Eighteen beam specimens of size 1650×200×150 mm were tested in the investigation. Test outcomes demonstrated that the inclusion of fibers in a hybrid form could ensure superior composite performance in terms of flexure and impact resistance when compared to the incorporation of a single type of fibers in reinforced concrete. Doi: 10.28991/CEJ-2022-08-03-010 Full Text: PDF
Influence of Compaction Energy on Cement Stabilized Soil for Road Construction
Authors: Sadek Younes , Rikioui Tayeb , Abdoun Toufik , Dadi Abdellah 
Published: March 2022

Compactness is an important feature to ensure subgrade stability where temperature and water infiltration exist in semi-arid areas. Chemical soil stabilization can improve soil properties. This research studies the impact of compaction energy on stabilized subgrade soil and how to improve its geotechnical characteristics in the experimental tests on both unstabilized and stabilized soil samples by adding ordinary Portland cement and sulfate-resistant cement, in percentages by the soil's weight, in order of identification and classification, to the strength properties tests: compaction at multiple energies, CBR, and UCS. A test protocol was followed to assess the relationship between cement soil treatment, mechanical characteristics, and compaction parameters at different energy levels. Findings show that the higher UCS values were recorded with an increase in compaction energy. The MDD of cement stabilized soil increases as compaction energy increases, whereas the OMC decreases, the UCS improves, and the CBR increases. These improvements have a positive influence on the performance of soil used as a subgrade. The combination of cement stabilization and a high compaction level for subgrades using weak soil can improve strength parameters throughout any phase of earthwork construction design that leads to strengthening subgrades, reducing the thickness, and, as a result, low construction cost. Doi: 10.28991/CEJ-2022-08-03-012 Full Text: PDF
Rehabilitation of Composite Column Subjected to Axial Load
Authors: Hassooni Anas Nahidh , Al-Zaidee Salah R. 
Published: March 2022

Concrete Filled Double Steel Tube (CFDST) columns are a modern technique of composite structural element that has fire resistance and has been adopted in high-rise building structures. The Concrete Filled Steel Tube (CFST) columns also have high strength and ductility due to composite action. This type of column CFST can sustain a heavy load with high performance and has been adopted in recent years in many countries around the world. The aim of the present work is to study the behavior and strength of rehabilitation of composite columns that are made from concrete core and surrounded steel tubes under the effect of axial compression loads with different height to diameter ratios such as 5.46, 10.91, and 16.37, respectively, by experimental tests. Double skin methodology is adopted to repair the damaged columns that were tested up to 85% of the ultimate load. Strength column capacity of double skin columns, axial and buckling deformations with axial and buckling strains are investigated. Test results showed that the repaired specimens up to 85% of the ultimate load had the same strength carrying capacity as compared with the control specimens, which had the same geometry. The ductility of an 800 mm specimen’s height is greater than the other tested specimens, while the stiffness of short specimens becomes high. Doi: 10.28991/CEJ-2022-08-03-013 Full Text: PDF
Rotation of Stresses in French Wheel Tracking Test
Authors: Djenane Mohamed , Demagh Rafik , Hammoud Farid 
Published: March 2022

The main function of a pavement is to distribute the traffic-induced load over its different layers. While the flexible pavement design methods are based on a linear elastic calculation, the real behavior of the different layers is highly non-linear and elastic. They can also, in some cases, be plastic and viscous. This research aims to develop a three-dimensional numerical model that is closely similar to the test FWTT conditions. The model will have a real geometry wheel footprint (rather than a rectangular shape). As a substitute for incremental loading, the wheel movement during its passage over the specimen will be simulated by a horizontal displacement. These important characteristics of the model represent the novelty and the major difference between the current research and previous studies. The current model, which is based on the finite elements method, uses Abaqus software and a viscoelastic constitutive model. The materials' viscoelastic properties have been described by the Prony series, also called the relaxation modulus, which is a function of time. This parameter can be defined in most computer-aided engineering (CAE) software. The procedure for calculating the Prony series from experimental data is explained. The results obtained agree with the stress signal amplitude, the stress rotation principal, and the total displacement rotation when the load approaches the node considered and located in the middle of the specimen. Doi: 10.28991/CEJ-2022-08-03-03 Full Text: PDF
Estimation of Overall Fatigue Life of Jack-up Leg Structure
Authors: Quang Cuong Dinh , Dan Chinh Vu 
Published: March 2022

Jack-up platforms are designed to work in three conditions: Transit, Preloading and Operating. The fatigue life of the jack-up platforms in operating condition will be determined to be similar to that of offshore fixed steel structures. In preloading conditions, fatigue damage is usually ignored. Up to now, the fatigue damage of the jack-up leg structure in transit conditions has been calculated at approximately 20% of the total fatigue damage of the jack-up leg structure in two conditions (transit and operating). The approximate calculation method is usually accepted by consultants and register agencies. If the approximation is used, the fatigue life of the jack-up leg structure will be calculated only as for the jacket structure of the fixed offshore structure, with 80% of the allowable fatigue life based on standards. The approximation proved to have many disadvantages: the different travel times of each jack-up rig cannot be mentioned; hot spots that need to be maintained during the transit condition have not been pointed out; it is difficult to guarantee the safety of the jack-up leg structures in the transit condition. In order to overcome the limitations of the approximation method, this paper will propose a method to predict the overall fatigue life of the jack-up leg structure in three main problems. Firstly, we use the analysis method of fatigue of fixed steel offshore structures for jack-up leg structures in operating conditions. Secondly, we suggest a method to analyze the fatigue of the structures in transit conditions. Herein, motion analysis and determination of inertia forces on the leg structure are performed by the Boundary Element Model (BEM) in SACS software. Then the inertia forces are assigned to a Finite Element Model (FEM) in SACS to decide the internal forces of the structures. Hotspot stresses are determined by combining nominal stress from FE analysis results with a concentrated stress factor from the analysis of joint local models in the ANSYS program. Then, fatigue damage and fatigue life of hotspots of the structure are determined in the transit condition. Finally, a formula is suggested to determine total fatigue damage in operating conditions and transit conditions with different cases in relation to different fraction factors. These results are used to predict fatigue life corresponding to the most dangerous cases of structural joints. These new suggestions are applied to fatigue analysis for jack-up Tam Dao 05. Currently, the Tam Dao 05 platform has been operating in the Vietnam East Sea. Doi: 10.28991/CEJ-2022-08-03-06 Full Text: PDF