bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH REGULASI DIRI TERHADAP PROKRASTINASI AKADEMIK PADA SISWA SMA
Authors: Dwi Kencana Wulan Putri Ramadhani Ayu Ardina,
Published: August 2017

Academic procrastination is one of the problems student usually faced, caused by fatigue or boredom. While in the other side, students needs the ability to regulate themselves for striving their goals. This study aims to determine the influence of self-regulation towards academic procrastination using quantitative method with psychological scale in questionnaire form. This research instrument was developed based on the theory of academic procrastination by Ferrari and self-regulation theory by Barkley. This research was conducted in June 2016. The samples of this study were the tenth grade students of SMA Negeri 10 Jakarta (State Senior High School of Jakarta). The sampling technic used was cluster random sampling. The analytical statistic used to test the hypothesis was regression analysis using SPSS program verse 19 and Rasch Model. The Result of this study indicates that there is negative effect of self-regulation towards academic procrastination. It shows that the higher self-regulation performed, then the lower academic procrastination will become. The influence which resulted by self-regulation towards academic procrastination is 29,3% and the rest 70,7%, is caused by another factor.
PEMBELAJARAN MENULIS DI SEKOLAH DASAR
Authors: Yarmi Gusti
Published: August 2017

The aims of this study is to find out the teacherâ€™s understanding of the application of learning to writing in Islamic Primary School Jerapah Kecil, East Jakarta. Using ethnographic methods (Spradley model), this qualitative study was conducted in March-July 2013. The results of this study indicate that the teaching of writing in Islamic Primary School Jerapah Kecil has a unique in the learning objective. The students are expected to have writing skills through contextual writing practice and to enjoy writing. Through various writing activities the teacher builds positive attitude on the students. Beside the communicative and the whole language approaches, the teaching also implements student-centered approach. The studentsâ€™ writing skills are developed through several kinds of writing activities at school and out of school. The studentsâ€™ writing performance is asseesed not only based on their product but also writing process. Then assessment covers cognitive and affective aspects. Using a variety of learning resources in writing, such as museum, can develop the studentsâ€™ positive attitudes.
MODEL KONSELING KELOMPOK COGNITIVE BEHAVIOR UNTUK MENINGKATKAN SELF ESTEEM SISWA SMK
Authors: Habsy Bakhrudin All
Published: August 2017

The purpose of this research is to test effectiveness of Cognitive Behavior Group Counseling to increase self esteem of vocational high school students. The research was conducted from November to January 2016. In this research, a researcher used exsperiment structure with design pretest and posttest control group. Grounded on result of measure inventory self esteem issues twelve students identification as students have characteristic low self esteem. Furthermore comb out subject for group experiment and group control used by random with amount six students for every group. There are two kinds of instrument are used those are instument treatment and measure. Instrument treatment as project implementation group counseling cognitive behavior, whereas instrument measure as inventory self esteem which has validity value grain total with value R on top of 0,32, and realibility are 0,945 can be concluded inventory self esteem reliable and worth as a research instrument. The data is analyzed with test statistic nonparametrik Two Independent Sample Test Mann Whitney U. The income hypothesis get value Z is -2,242 and figure Asymp. Sig. (2-tailed) is 0,025 < 0,05, so Ho is refused, which meaning effectiveness of Cognitive Behavior Group Counseling to increase self esteem of Vocational high school. Based on the analysis of the found the research (1) to counselor: Cognitive Behavior Group Counseling can be carried out to increase self esteem of vocational high school students, and can be principle to understanding of grown students; and 2) to next researcher: This research applicate Cognitive Behavior Group Counseling with cognitive restructuring, problem solving and homework technique, for the Next researcher can test the effectiveness by using the other technique that relevant, or may be the researcher can use the other design as single subject design, action research in guidence and counseling, or the other exsperiment research that model Cognitive Behavior Group Counseling can be test the effectiviness.
PENGARUH STRES SITUASI KERJA TERHADAP PSYCHOLOGICAL WELL-BEING PADA GURU HONORER MADRASAH IBTIDAIYAH DI KOTA TANGERANG
Authors: Raisata Makbulah Fitri Lestari Issom,
Published: August 2017

This study aims to determine the effect of stress on the job situation of psychological well-being. The population in this study is a honorary teachers in Islamic Elementary School in the City of Tangerang. This study uses a quantitative method with a sample of honorary teachers in Islamic Elementary School in the City of Tangerang amounted to 55 respondents. The sampling technique used was cluster sampling with 55 respondents. This study uses two scale that a scale of psychological well-being and stress scale were arranged by researcher based on the theories of stress advanced by Robbins & Judges (2013), Gibson, Ivancevich, Donelly & Konopaske (2012) and Newstrom & Davis (2002). Test hypothesis in this study using a regression analysis one predictors. Based on the analysis of data, this means that there is influence between stress on the job situation to the psychological well-being on a honorary teacher Islamic Elementary School (MI) in the city of Tangerang. The resulting negative influence, meaning that if the work situation of high stress levels, the levels of psychological well-being will be lower.
PENGARUH KOMUNIKASI INTERPERSONAL, PENGETAHUAN TENTANG LINGKUNGAN DAN MOTIVASI PENINGKATAN PENDAPATAN TERHADAP PARTISIPASI DALAM PELESTARIAN LINGKUNGAN WISATA
Authors: Sitanggang H.D. Melva Meinaria
Published: August 2017

The objective of this research is to know the effect of level interpersonal communication,enviromental knowledge and motivation increasing income which participation people in eternal a tour. Theresearch is done by using survey method to 80 respondents are inhabitants around Danau Toba from 2 (two)district; Simalungun and Samosir, North Sumatera.The results this research are : 1. There is direct effect of interpersonal communication to peopleâ€™smotivation increasing income; 2. There is direct effect of enviromental knowledge to peopleâ€™s motivationincreasing income; 3. There is direct effect of interpersonal communication to peopleâ€™s participation ineternal a tour; 4. There is direct effect of environmental knowledge to peopleâ€™s participation in eternal ator; 5. There is direct effect of peopleâ€™s motivation increasing income to peopleâ€™s participation in eternal atour.Results of this research give implication that peopleâ€™s participation to eternal a tour is highlydetermined by interpersonal communication, environmental knowledge, and motivation increasing income.
PENGARUH TRI GURU, PERSEPSI MENGENAI TRI HITA KARANA, NILAI BUDAYA, DAN MOTIVASI TERHADAP PERILAKU BERWAWASAN LINGKUNGAN: Studi Kausal Pada Krama Desa Pakraman Sukawati Kecamatan Sukawati Kabupaten Gianyar Provinsi Bali
Authors: Suastawa I Ketut Pande
Published: August 2017

This research is aim at finding out direct effect of Three Teachers (Tri Guru) on environmentally soundbehavior and to identify indirect effect of Tri Guru on environmentally sound behavior through perception aboutThree Balance Concept (Tri Hita Karana), cultural value, and motivation of villagers in Sukawati Village,District Sukawati, Gianyar Regency, Bali in 2009.Data was collected by questionnaire. The item validity of instruments was tested by Product MomentCorrelation; and the reliability was tested by Alpha Cronbach. The total sample of 251 was recruited during thestudy. Data analyses applied to test the model matching was Structural Equation Modeling.The result of analysis finds out that Tri Guru affects environmentally sound behavior significantly throughperception about Tri Hita Karana, cultural value, and motivation in greater value than direct effect of Tri Guruon environmentally sound behavior. The Model match test shows that the modified path model have achievedthe criteria of model matching, because matching test indicators achieve minimum cut-off value.Based on these findings, it could be concluded that any changing or variation on environmentally soundbehavior have been directly affected by villagers evaluation on Tri Guru, indirectly affected by perception aboutTri Hita Karana, cultural value of environmental care, and motivation to preserve the function of environment.Therefore, when we want to increase environmentally sound behavior of villagers, these factors such as TriGuru, perception, cultural value and motivation are necessary to be taken into account.
PENGARUH STRATEGI PEMECAHAN MASALAH DAN PEMAHAMAN BUDAYA TERHADAP PARTISIPASI MASYARAKAT DALAM PELESTARIAN KAWASAN LINDUNG TROWULAN, MOJOKERTO
Authors: Yulianto Kresno
Published: August 2017

A lot of damage due to excessive exploitation has been done on the prominent archaeological site ofTrowulan, and this may partly be attributable to the minimum involvement of the community in the conservationefforts. The experimental study aims to assess the different effects of the two community- based conservationmethodsâ€”Participation Rural Appraisal (PRA) and Rapid Rural Appraisal (RRA)â€”on the communityparticipation in the preservation of the site. Four questions were raised as to (1) whether there is any differencebetween the participation of the community applying the PRA method and that of the community applying theRRA method; (2) whether there is any difference between the participation of the community with high levelcultural understanding applying the PRA method and that of the community with high level culturalunderstanding applying the RRA method; (3) whether there is any difference between the participation of thecommunity with low level cultural understanding applying the PRA method and that of the community with lowlevel cultural understanding applying the RRA method; and (4) whether there is any interaction between problemsolving strategy and cultural understanding in the participation of the community in the conservation of theTrowulan archaeological site. The 2x2 factorial design was applied on a sample consisting of 60 randomlyselected adult and married respondents from two villages in Kecamatan Trowulan. The study found (1) asignificant difference between the participation of the community applying the PRA method and that of thecommunity applying the RRA method; (2) no difference between the participation of the community with highlevel cultural understanding applying the PRA method and that of the community with high level culturalunderstanding applying the RRA method; (3) no difference between the participation of the community with lowlevel cultural understanding applying the PRA method and that of the community with low level culturalunderstanding applying the RRA method; and (4) interaction between problem solving strategy and culturalunderstanding in the participation of the community in the conservation of the Trowulan archaeological site.
PENGARUH PENGETAHUAN TENTANG HUKUM LINGKUNGAN DAN PENILAIAN ATAS REGULASI PEMERINTAH TERHADAP PARTISIPASI PELAKU INDUSTRI DALAM MENGELOLA KAWASAN INDUSTRI DI KOTA SINGKAWANG
Authors: Hassim Rudi Agustian
Published: August 2017

The objective of this research is to analyze the effects of knowledge about environmental law andassessment of government regulations on industrial doersâ€™ participation in managing the industrial area inSingkawang city. The sample of this research were 48 persons which randomly taken. The data were analyzed byusing ANAVA 2 X 2. Findings of the research indicated that the industrial doers who were knowledgeable aboutenvironmental law and had positive assessment of government regulations participated better in industrialmanagement than those who had negative assessment. Therefore, the two variables should be taken intoconsideration to increase the doersâ€™ participation in managing industrial area.
THE EFFECT OF GENDER DIFFERENCES ON PRO ENVIRONMENTAL BEHAVIOR IN DIRECTORATE GENERAL BINAPENTA&PKK, MINISTRY OF MANPOWER, 2016
Authors: Pronityastuti Meyrina
Published: August 2017

The purpose of this research is to determine the effect of gender differences on pro environmental behavior among employees of Directorate General Binapenta and PKK, Ministry of Manpower. Samples of 126 respondents were taken by taking a simple random sampling technique from the employees. This research used non test instruments, measuring pro environmental behavior.

The research results show that there were diffences of pro environmental behavior which affected by the gender.. Based on the result, the pro environmental behaviors of female employees are better than male employees. Therefore, in order to improve pro environmental behavior of employees, gender of the employees should be considered as influential factors.
ANALISIS KOMPARATIF MANAJEMEN STRATEGIS GREEN OFFICE ANTARA BADAN PENGEMBANGAN DAN PEMBERDAYAAN SDM KESEHATAN (BPPSDMK) DAN SEKRETARIAT JENDERAL (SEKJEN) DI LINGKUNGAN KEMENKES RI
Authors: Mufidah Ida Umarul
Published: August 2017

This research aims to know the Comparative strategic management and implementation of green office among the development and empowerment of human resources for health (BPPSDMK) and the Secretariat-General (GENERAL SECRETARY) of the Ministry of health of the Republic of Indonesia in the Green Office Guideline Standards and Healthy. The research method used was multiple case study approach to comparative analysis. Research conducted in November 2016 s/d in March 2017.The research results of the implementation of strategic management BPPSDMK better than the SECRETARY-GENERAL in meeting the guidelines of the Office of the Green and healthy, it is also corroborated by scoring a total of strategic management BPPSDMK 15 (75%) while the total performance of the SECRETARY-GENERAL of 9 (45%) total performance.
PENGEMBANGAN ALAT PERAGA MATEMATIKA UNTUK MENINGKATKAN MINAT DAN MOTIVASI BELAJAR MATEMATIKA SISWA SEKOLAH DASAR
Authors: Murdiyanto Tri , Mahatama Yudi
Published: August 2017

Kegiatan pengabdian kepada masyarakat dikuti oleh 24 orang guru  Sekolah Dasar yang ada di sekitar SMAN V Kabupaten Garut pada tanggal 20 Septemberr 2014.   Alat Peraga yang ditawarkan  kepada peserta untuk dirancang, dibuat dan digunakan antara lain: model bangun datar, model bangun ruang, model kerangka bangun ruang, model bangun ruang trasparan dan Model Kartu Pecahan Biasa-Persen.
Perbandingan Latihan Joging dan Lompat Tali terhadap Denyut Nadi Istirahat pada Atlet Klub Bola Voli Taruna Bekasi
Authors: Pradana Willy , Hermawan Iwan , Fitrianto Eko Juli
Published: August 2017

PERBANDINGAN LATIHAN JOGING DAN LOMPAT TALI TERHADAP DENYUT NADI ISTIRAHAT PADA ATLET KLUB BOLA VOLI TARUNA BEKASI

 

Willy Pradana1

Iwan Hermawan2, Eko Juli Fitrianto2

 

1Program Studi Ilmu Keolahragaan

2Fakultas Ilmu Keolahragaan Universitas Negeri Jakarta, Kampus B, Jakarta

 

Abstrak. Penelitian ini bertujuan untuk mengetahui latihan mana yang lebih efektif antara latihan joging dan latihan lompat tali  terhadap denyut nadi istirahat pada Atlet Klub Bola Voli Taruna Kota Bekasi. Pertemuan dilakukan sebanyak 3 kali selama 1 minggu. Total pertemuan latihan berjumlah 18 kali pertemuan. Metode penelitian yang digunakan dalam penelitian ini adalah metode eksperimen. Sampel yang digunakan dalam penelitian ini adalah Atlet Putra Klub Bola Voli Taruna Kota Bekasi yang berjumlah 20 orang. Teknik analisis data yang digunakan adalah teknik statistik dengan uji-t pada taraf signifikan Î± = 0,05, teknik analisa data yang digunakan adalah analisa uji-t mulai dari menghitung t-hitung untuk dibandingkan dengan nilai  t-tabel pada taraf signifikan 5%. Data tes akhir latihan joging dan latihan lompat tali diperoleh standar perbedaan antara dua mean (SE ) = 0,47 nilai tersebut menjadi t-hitung diperoleh = 2,55. Kemudian hasil perhitungan tersebut diujikan dengan tabel pada derajat kebebasan (dk) = (N1 + N2) â€“ 2 = (10 + 10) â€“ 2 dan taraf kepercayaan Î± = 0,05 diperoleh nilai kritis t-tabel 2,101 ( t-hitung = 2,55 Ëƒ t-tabel = 2,101). Dengan demikian terdapat perbedaan yang diperoleh melalui penelitian ini adalah latihan joging lebih efektif dari pada latihan lompat tali terhadap denyut nadi istirahat pada Atlet Klub Bola Voli Taruna Kota Bekasi.

Kata Kunci : Latihan, Joging, Lompat tali, Denyut Nadi Istirahat.
Modificaciones en el nivel de anión superóxido en leche materna, según la ingesta de flavonoides y carotenoides
Authors: Marchesino Mariana A , Cortez Mariela V , Albrecht Claudia , Aballay Laura R , Soria Elio A
Published: August 2017

Objetivo. Asociar la ingesta de flavonoides y carotenoides con el nivel en leche materna del anión superóxido, como marcador de estrés oxidativo. Material y métodos. Durante el periodo 2013-2015 se estudió a 100 mujeres lactantes de Córdoba (Argentina), dentro los primeros seis meses posparto; se evaluaron sus datos sanitarios, ingesta alimentaria y nivel lácteo del anión con regresión logística múltiple. Resultados. La ingesta de flavonoides, carotenoides provitamínicos y carotenoides no provitaminas fue de 72 (61) mg/día, 1 813 (1 657) μg/día y 5 427 (3 664) μg/día, respectivamente. El anión se asoció con la ingesta de flavanoles (RM=1.081; IC95 1.001-1.167) y flavanonas (RM=1.025; IC95 1.001-1.048). No se observó este efecto con otros flavonoides ni con los carotenoides. Conclusiones. La ingesta de flavanoles y flavanonas aumenta el riesgo de oxidación láctea, lo cual es relevante para realizar recomendaciones dietéticas.
Elementos regulatorios sobre la marihuana, a consideración para la efectiva protección a la salud de la población
Authors: Santos-Burgoa Carlos
Published: August 2017

Al hablar del abordaje de salud pública al uso de la marihuana se soslaya la complejidad de la protección a la población a través de intervenciones regulatorias rigurosas. Considerando la experiencia de gobiernos donde ya existen estas prácticas, se introduce la regulación como una función esencial de la salud pública, haciendo explícitos siete propósitos para el control de la marihuana. Se detallan luego los elementos técnicos, de capacidad institucional (incluyendo la capacidad técnica y financiera) y de gobernanza que deben cumplirse para cualquier regulación rigurosa de su uso. Se señala la dificultad de regular sustancias psicoactivas considerando que la capacidad de control de otras actualmente legales se ha traducido en su creciente consumo. Se expone también que no debe minimizarse la necesidad del fortalecimiento institucional y gobernanza de la autoridad regulatoria para la regulación efectiva de la marihuana.
Critical Review of Mechanistic and Empirical (Semimechanistic) Models for Particle Removal From Sandbed Deposits in Horizontal Annuli With Water
Authors: Bizhani M.. , Kuru E..
Published: August 2017

An experimental study was conducted to investigate turbulent flow of water over a cuttings bed by use of a large-scale horizontal-flow loop. A nonintrusive laser-based-imaging technique was used to determine instantaneous local velocity near the stationary sandbed/fluid interface in the horizontal annulus. The velocity measured directly at the sandbed/fluid interface was then used for critical evaluation of the accuracy of the assumptions and correlations commonly used for development of mechanistic and semimechanistic sediment-transport models. In particular, effects of turbulent velocity fluctuations on the magnitude of the hydrodynamic drag and lift forces and the interfacial (bed) shear stress are investigated.
PENGEMBANGAN MODUL PEMBELAJARAN BERBANTU WOLFRAM MATHEMATICA DAN FLIPBOOK MAKER DENGAN MODEL TIME GAME TOURNAMENT PADA MATERI TURUNAN KELAS XI SMA
Authors: Sutrisno Ali Shodiqin Fiqi Annisa Indrawati
Published: August 2017

Penelitian pengembangan ini bertujuan untuk menghasilkan produk berupa modul pembelajaran berbantu Wolfram Mathematica dan Flipbook Maker dengan model Time Game Tournament yang teruji kevalidan dan keefektifannya untukmeningkatkan hasil belajar peserta didik pada materi turunan kelas XI Semester II SMA Negeri 1 Juwana tahun ajaran 2014/2015. Jenis penelitian yang digunakan adalah jenis penelitian pengembangan (research and development), dengan model pengembangan yang dipilih adalah model pengembangan Borg and Gall. Metode pengumpulan data menggunakan lembar validasi, angket dan tes hasil belajar. Hasil penelitian ini adalah : 1) Hasil review dari ahli materi menyatakan modul pembelajaran berada pada kualifikasi sangat layak. 2) Ahli media memberikan tanggapan modul pembelajaran berada pada kualifikasi sangat layak. 3) Hasil tanggapan peserta didik diperoleh persentase tingkat pencapaian berada pada kualifikasi layak. 4) Pengembangan modul pembelajaran ini efektif meningkatkan hasil belajar matematika peserta didik kelas XI di SMA Negeri 1 Juwana. Hal ini ditunjukkan melalui uji kesamaan dua rata-rata yaitu uji t satu pihak kanan bahwa hasil belajar peserta didik menggunakan modul pembelajaran berbantu Wolfram Mathematica dan Flipbook Maker dengan model TGT  materi Turunan lebih baik dari pada hasil belajar peserta didik yang tidak menggunakan modul pembelajaran berbantu Wolfram Mathematica dan Flipbook Maker dengan pembelajaran konvensional.
PENINGKATAN KUALITAS PEMBELAJARAN IPA MELALUI MODEL PROBLEM BASED LEARNING (PBL) MENGGUNAKAN AUDIOVISUAL
Authors: Sri Hartati Endang Eka Wulandari,
Published: August 2017

Tujuan Penelitian ini untuk meningkatkan kualitas pembelajaran IPA pada siswa kelas IV melalui model PBL menggunakan audiovisual. Penelitian ini menggunakan desain penelitian tindakan kelas yang berlangsung dalam tiga siklus. Data dianalisis dengan menggunakan teknik analisis deskriptif kuantitatif dan kualitatif. Hasil penelitian menunjukan bahwa (1) Keterampilan guru pada siklus I mendapat skor 18, siklus II skor 22, meningkat pada siklus III skor 25.(2) Aktivitas siswa pada siklus I skor 16,8, pada siklus II skor 22, meningkat menjadi 24,4 pada siklus III. (3) Respon siswa pada siklus I dengan persentase 71% siklus II dengan persentase 78%, meningkat 92% pada siklus III (4) Hasil belajar siswa pada siklus I mengalami ketuntasan klasikal sebesar 60%, siklus II sebesar 73%, dan mengalami peningkatan pada siklus III menjadi 94%. Kesimpulan penelitian ini menunjukan model PBL menggunakan audiovisual dapat meningkatkan kualitas pembelajaran IPA yang ditandai dengan meningkatnya keterampilan guru, aktivitas siswa, respon siswa dan hasil belajar siswa.
A hybrid linear–nonlinear approach to predict the monthly rainfall over the Urmia Lake watershed using wavelet-SARIMAX-LSSVM conjugated model
Authors: Farajzadeh Jamileh , Alizadeh Farhad
Published: August 2017

The present study aimed to develop a hybrid model to predict the rainfall time series of Urmia Lake watershed. For this purpose, a model based on discrete wavelet transform, ARIMAX and least squares support vector machine (LSSVM) (W-S-LSSVM) was developed. The proposed model was designed to handle linear, nonlinear and seasonality of rainfall time series. In the proposed model, time series were decomposed into sub-series (approximation (a) and details (d)). Next, the sub-series were predicted separately. In the proposed model, sub-series were fed into SARIMAX to be predicted. The residual of predicted sub-series (error) of the rainfall time series was then fed into LSSVM to predict the residual components. Then, all predicted values were aggregated to rebuild the predicted time series. In order to compare results, first a classic modeling was performed by LSSVM. Later, wavelet-based LSSVM was used to capture the peak values of rainfall. Results revealed that Daubechies 4 and decomposition level 4 (db(4,4)) led to the best outcome. Due to the performance of db(4,4), it was selected to be applied in the proposed model. Based on results, it was observed that the W-S-LSSVM's performance was improved in comparison with other models.
Compressed sensing based optimal sensor placement for leak localization in water distribution networks
Authors: Xie Xiang , Zhou Quan , Hou Dibo , Zhang Hongjian
Published: August 2017

The performance of model-based leak detection and localization techniques heavily depends on the configuration of a limited number of sensors. This paper presents a sensor placement optimization strategy that guarantees sufficient diagnosability while satisfying the budget constraint. Based on the theory of compressed sensing, the leak localization problem could be transformed into acquiring the sparse leak-induced demands from the available measurements, and the average mutual coherence is devised as a diagnosability criterion for evaluating whether the measurements contain enough information for identifying the potential leaks. The optimal sensor placement problem is then reformulated as a {0, 1} quadratic knapsack problem, seeking an optimal sensor placement scheme by minimizing the average mutual coherence to maximize the degree of diagnosability. To effectively handle the complicated real-life water distribution networks, a validated binary version of artificial bee colony algorithm enhanced by genetic operators, including crossover and swap, is introduced to solve the binary knapsack problem. The proposed strategy is illustrated and validated through a real-life water distribution network with synthetically generated field data.
Optimizing DMAs' formation in a water pipe network: the water aging and the operating pressure factors
Authors: Chondronasios Apostolos , Gonelas Konstantinos , Kanakoudis Vasilis , Patelis Menelaos , Korkana Panagiota
Published: August 2017

Dividing a water distribution network (WDN) into district metered areas (DMAs) is the first vital step towards pressure management and real losses reduction. However, other factors of water quality such as the water age must be taken into account while forming DMAs. The current study uses genetic algorithm (GA) optimization methods to achieve the desired WDN segmentation conditions in terms of: (a) reducing the operating pressure, thus reducing the system's real losses; and (b) reducing the water age, thus improving the feeling of water freshness and preventing growth of disinfection byproducts. Techniques based on GA are a proven way to provide a very good solution to optimization problems. The solution is obtained using an objective function and setting boundary constraints. The formation of the objective functions is tested through Matlab's optimization toolbox. The logic of the objective functions' formulation for both the operating pressure and the water age optimization is recorded and analyzed. The method's application utilized a sample network model assisted by EPANET and Bentley's WaterGEMS software tools. The morphology of the DMAs is presented for each scenario, as well as the results of the network's segmentation according to the operating pressure and the water age.
Forming DMAs in a water distribution network considering the operating pressure and the chlorine residual concentration as the design parameters
Authors: Gonelas Konstantinos , Chondronasios Apostolos , Kanakoudis Vasilis , Patelis Menelaos , Korkana Panagiota
Published: August 2017

Dividing a water distribution network (WDN) in the optimal district metered areas (DMAs) formation is one task that usually troubles water utility managers. The present paper utilizes optimization methods to achieve desired segmentation conditions in terms of (a) operating pressure reduction, thus reducing the system's real water losses and (b) residual chlorine concentration reduction thus preventing disinfection byproducts' growth. Exploiting the numerous possibilities offered by the inter-connection of Matlab and EPANET software tools, an algorithm is developed in C++ language. The algorithm reads all significant data of a WDN as an output of EPANET. The first algorithm calculates the optimal allocation of a given number of closed isolation valves in terms of water losses' reduction, considering restrictions for network's proper operation. The second algorithm calculates the optimal formation of DMAs in terms of water quality improvement. Both algorithms can be applied in any WDN. The outcome is the optimal set of closed pipes that leads to the optimal formation of DMAs in a given network. The closing of pipes (by installing isolation valves) determines the optimal formation of DMAs. The basic concept of both algorithms and their application in a case study network's hydraulic model are presented.
Comparative Photocatalytic Degradation of Organic Dyes Using Silver Nanoparticles Synthesized from Padina tetrastromatica
Authors: Selvi Barnabas Clara Gnana , Theerthagiri Jayaraman , Santhanam Amutha
Published: August 2017

Background:

Seaweeds, being abundant sources of active components have attained
much interest in recent times. The seaweeds are routinely used in life science research and are well
known for their biological applications. In addition to that, the synthesis of metallic nanoparticles
from these natural resources has its own attraction in drug delivery and was observed by using 2 mL
of Ag NP colloids.

Objective:

In this study, the synthesis of silver nanoparticles (Ag NPs) using Padina tetrastromatica
has been evaluated for their catalytic activity in the degradation of organic dye.

Method:

The catalytic activity of the biosynthesized Ag NP colloid was studied for the degradation
of Methylene blue (MB) and Acridine orange (AO) dye. The degradation of methylene blue and
acridine orange was observed at regular time interval by using UV-vis absorption spectra at 664 nm
and 490 nm respectively.

Results:

The percentage of dye degradation increased in the presence of NaBH4. It was observed that
80.09% of MB dye reduction was observed by using 2 mL of Ag NP colloids. The acridine orange
dye showed reduction of 83.06%. The rate constants for the reduction of Methylene blue (MB) and
acridine orange (AO) dye using 2 mL Ag NPs colloids are 0.077 and 0.090 min-1, respectively.
Coating of L-Arginine Modified Silica on Magnetite through Two Different Sol-Gel Routes
Authors: Amaria Amaria , Suyanta Suyanta , Nuryono Nuryono
Published: August 2017

In this research, magnetite coated with L-arginine modified silica (Fe3O4/SiO2-GPTMS-Arg) has been synthesized through a sol-gel process at a room temperature in two Routes. In Route 1, a precursor of sodium silicate solution (source of SiO2), 3-glycidoxypropyltrimethoxysilane (GPTMS) as a coupling agent and L-arginine (Arg) as the source of functional groups were added sequentially to magnetite nanoparticles (Fe3O4). Gelling was carried out by adding HCl solution dropwise to the mixture to reach pH of 7.0. The product was washed with water and ethanol and then dried at 65 °C for 1 day. In Route 2, sodium silicate solution was added to a mixture of GPTMS and L-arginine, and then the sol obtained was added into magnetite nanoparticles. The results were characterized with FTIR spectroscopy, X-ray diffraction, atomic absorption spectroscopy and volumetric method to identify functional groups, crystal size, iron ions released and amino groups content, respectively. The results showed that Fe3O4/SiO2-GPTMS-Arg has been successfully synthesized through both two routes. Route 1, however, gave product of Fe3O4/SiO2-GPTMS-Arg more stable and more content of amino groups than Route 2. The presence of amino groups leads to the application of the product for metal ion removal from aqueous solution.
Humic Acid Coated Fe3O4 Nanoparticle for Phenol Sorption
Authors: Koesnarpadi Soerja , Santosa Sri Juari , Siswanta Dwi , Rusdiarso Bambang
Published: August 2017

The coating Fe3O4 using humic acid (HA) to form HA-coated Fe3O4 (Fe3O4/HA) was conducted and applied for phenol sorption. Fe3O4/HA was prepared using co-precipitation method in an alkaline condition using ammonium hydroxide and the addition of HA with mass ratios of Fe3O4 and HA=20:1, 10:1, 10:2, 10:3. The HA from peat soil in Sambutan village, East Kalimantan, Indonesia and was extracted in NaOH 0.1 M solution. The FT-IR characterization indicated that the coating of HA on the surface of Fe3O4 was successfully synthesized by forming a bond between the carboxylate group of HA and iron of Fe3O4. The coating of HA on the surface of Fe3O4 did not change the crystal structure of Fe3O4, but had lower peak intensities than Fe3O4 if added with HA with mass ratios 20:1, 10:1, 10:2, 10:3. The saturation magnetization of Fe3O4 decreased with the increased content of HA. SEM image indicated the magnetic particle size was almost homogenous by 10-18 nm. Iron and HA in Fe3O4/HA materials synthesized using different mass ratios were stable in pH range of 3.0-11.0 and 1.0–11.0, respectively. The phenol sorption on Fe3O4 was optimum at pH 5.0 and on Fe3O4/HA with mass ratios of 20:1, 10:1, 10:2, 10:3 were optimum at pH 5.0-6.0. The kinetics model for phenol adsorption on Fe3O4 and Fe3O4/HA with mass ratios of 20:1, 10:1, 10:2, 10:3 could be described using pseudo second-order equation and was in accordance with the Langmuir isotherm model with maximum adsorption capacity of 0.45 mmol/g for Fe3O4 and 0.55, 0.56, 0.58, 0.56 mmol/g respectively for Fe3O4/HA with mass ratios of 20:1, 10:1, 10:2, 10:3. The adsorption capacity increased with the increased content of HA, but the adsorption energy decreased except Fe3O4/HA with a mass ratio of 10:3. Generally, the performance of Fe3O4/HA materials was much higher than of bare Fe3O4.
Cobalt Oxide-Modified Titanium Dioxide Nanoparticle Photocatalyst for Degradation of 2,4-Dichlorophenoxyacetic Acid
Authors: Yuliati Leny , Roslan Nur Azmina , Siah Wai Ruu , Lintang Hendrik Oktendy
Published: August 2017

2,4-dichlorophenoxyacetic acid (2,4-D) has been recognized as a possibly carcinogenic compound to human, therefore, 2,4-D should be treated before it is discharged to the environment. Photocatalytic degradation of 2,4-D has been proposed as one of the best methods that offer environmentally safe process. In the present research, titanium dioxide (TiO2) was modified with cobalt oxide (CoO) and tested for photocatalytic degradation of 2,4-D under UV light irradiation. Different amounts of CoO (0.1, 0.5, 1 and 5 mol%) were added onto TiO2 by an impregnation method. The photocatalytic reaction was monitored and analyzed by measurement of 2,4-D absorbance using UV spectrophotometer. After 1 h photocatalytic reaction, it was confirmed that the sample with low loading of 0.1 mol% gave the highest photocatalytic activity among the bare and modified TiO2 photocatalysts. The photocatalytic activity was decreased with the increase of CoO loading, suggesting that the optimum amount of CoO was an important factor to improve the performance of TiO2. Based on fluorescence spectroscopy, such addition of CoO resulted in the reduced emission intensity, which showed the successful decrease in the electron-hole recombination.
Formation of Ketoprofen-Malonic Acid Cocrystal by Solvent Evaporation Method
Authors: Wicaksono Yudi , Setyawan Dwi , Siswandono Siswandono
Published: August 2017

The purpose of this work was to explore the formation of ketoprofen-malonic acid cocrystal by solvent evaporation method. Early detection of cocrystal formation was conducted by hot stage microscopy and solid-liquid phase diagram. Cocrystal were prepared by solvent evaporation method by using isopropyl alcohol as solvent. Characterization of cocrystal was done by Powder X-Ray Diffractometry (PXRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared (FTIR) Spectroscopy and Scanning Electron Microscopy (SEM). The results of hot stage microscopic and solid-liquid phase diagram indicated formation of ketoprofen-malonic acid cocrystal. PXRD and DSC measurements showed stoichiometric ratio of cocrystal ketoprofen-malonic acid (2:1). The ketoprofen-malonic acid cocrystal had melting point at 86.2 °C and unique peaks of PXRD pattern at 2θ of 6.1°, 17.8°, 23.2° and 28.6°. FTIR spectra indicated the formation of cocrystal due to interaction of C=O ketone group of ketoprofen with MA molecule. SEM images show that ketoprofen-malonic acid cocrystal have multi-shaped particles with rough surfaces.
Competitive and Comparative Advantages Analysis of Organic Rice Farming in Karanganyar Regency, Central Java Province
Authors: Suharyati Anita , Hartono Slamet , Waluyati Lestari Rahayu
Published: August 2017

In era of the free trade which increasingly competitive, it is important to understandthe competitiveness of foodstuff commodity by every country. Public awareness of health hazards and adverse environmental impacts, as well as the trend of consumers choosing safe foodstuffs, lead to a shift to the cultivation of organic systems. This paper uses Policy Analysis Matrix (PAM) analysis to determine whether rice farming system has a comparative and competitive advantages when produced with organic farming practices. The purposes of this paper are to (1) Analyse the financial and economic advantages of organic rice farming in Karanganyar. (2) Analyse competitiveness of organic rice in Karanganyar Regency viewed from competitive advantage and comparative advantage. Based on the data analysis,results show that the organic rice farming in Karanganyar Regency has a competitive advantage and comparative advantage, indicated by PCR and DRC value that is less than one. The competitive advantage of organic rice in Karanganyar Regency is greater than the comparative advantage. PCR coefficient amount of 0.74 and DRC coefficient amount of 0.56. Thus organic rice farming in Karanganyar Regency is worth developing and has good competitiveness in domestic market as well as international market.
Proline Activity and Growth of Oil Palm affected by Aluminium Toxicity and Silica as Ameliorant
Authors: Khoiriyah Annisa , Putra Eka Tarwaca Susila , Yudono Prapto
Published: August 2017

The research aims to investigate the effects of silica (Si) as an ameliorant on the proline compound concentration and the growth response of oil palm exposed to aluminum toxicity. The research was arranged in a complete randomized block design with 8 blocks as replications. The first factor was Al toxicity which consisted of two levels as without and with Al toxicity. Al toxicity treatment was applied by giving 300 ppm of Al concentrate along with watering activity regularly. The second factor was the application of silica which consisted of four levels as 0, 32, 64 g/plant. Proline and growth activities of leaf area, plant height, number of leaves, and dry weight were observed in the research. The data subjected to analysis of variance (ANOVA) at 5% test level. If the result of ANOVA showed significant differences among treatments, then the data would have been analyzed by Duncan’s Multiple Range Test (DMRT) at 5% test level. The results of the research provide information that Al toxicity increases proline compound in the plant tissues and decreases leaf area, plant height, number of leaves, and dry weight of Oil Palm. Applying Si at the level of 64 g/plant could increase proline concentrate and dry weight of oil palm exposed to A1 toxicity. Proline compound in the plant tissues did not have any correlation with the growth of oil palm. Thus, this case indicated that proline was a product and not a plant tolerant mechanism of Al toxicity.
Effect of The Substitution of Compound Fertilizer With Single Fertilizer and Mycorrhizal Inoculation on The Growth and Yield of Soybean Among Eucalyptus
Authors: Sinaga Apresus , Indradewa Didik , Suryanto Priyono
Published: August 2017

The efforts to improve the productivity of soybean can be done through technological innovation by the provision of chemical fertilizers and mycorrhizae. This study were aimed to obtain information on the effect of a single fertilizer, which can provide the same or higher level of soybean crops if compared with those compound fertilizers, as well as to find out the effect of mycorrhizae to the improvement of efficiency in the use of inorganic fertilizers. It is expected that the mycorrhizae inoculation can reduce single fertilizer’s dose to the level equivalent to the compound fertilizer given by farmers. The study was conducted in Bleberan Village, Playen Subdistrict, Gunung Kidul Regency, Yogyakarta from February to May 2015. It was conducted by using a two-factors factorial design arranged in a randomized block design with three replications. The first factor was inorganic fertilizer (N, P2O5 and K2O), consisting of 5 levels, i.e. without fertilizer (0-0-0 kg/ ha), Phonska fertilizer (45-45-45 kg/ha), single fertilizer (45 -45-45 kg/ha), a low single fertilizer (23-36-30 kg/ha) and high single fertilizer (23-108-90 kg/ha). The second factor was mycorrhizal inoculation, consisting of three levels, i.e. without mycorrhizae (0 g), medium dose (2.5 g) and high dose (5 g). Data were analyzed using Analysis of Variance (ANOVA) at a significance level of 5%. If there was a significant difference, analysis was followed by Duncan Multiple Range Test with a significance level of 5%. The relationship between variables observed was examined by a correlation analysis. The results showed that there was no interaction between inorganic fertilizer and mycorrhizal application. The dose of single fertilizer which was equivalent to the dose of compound fertilizer given to soybean could increase crops by 1.37 t/ha compared with plants treated with a compound fertilizer 1.13 t/ha. The results of correlation analysis among parameters showed that there were correlations between the grain crops and height (r = 0.506**), stem diameter (r = 0.303*), and the number of pods per plant (r = 0.313*).
Analysis of Susceptance Storey Level Damage of Coral Reefs in Territorial Water of Archipelago in Karimunjawa by Using Geographical Information System
Authors: Jumadi J , Priyono Kuswaji Dwi
Published: August 2017

This research aim to determine susceptance storey level damage of coral reefs in Territorial Water of Archipelago of Karimunjawa. Method which used in this research is special data analysis which in the form of data of sekunder by using Geographical Information System. Pursuant to analysis known that research area there are six especial stressor which menace coral reefs for example: Port, Airport, Center Dive, Coastal Wisata, Resident, and Appliance Catch. Pursuant to spasial analysis which have can be determined that equal to 69.50% from entire coral reefs research area in a condition do not susceptance, namely there are in territorial water region of Island: Kembar, Parang, Kumbang, Katang, Nyamuk, Krakal Besar, Krakal Kecil, Geleang, Burung, Bengkoang, Menyawakan, Cemara Besar, Cemara Kecil, Sintok, Gundul, Cendikian, Genting, Seruni, and Sambangan. As for the rest equal to 30.50% enough natural rentan of damage, there are at territorial water of islands owning high resident activity storry level, namely around in Island: Kemujan, Karimunjawa, Menjangan Besar, and Menjangan Kecil.
Total Suspended Load and Sediment Yield of Kayan River, Bulungan District, East Kalimantan
Authors: Dibyosaputro Suprapto
Published: August 2017

This research was carried out the the drainage system of Kayan river, Bulungan District, East Kalimantan. The purpose of the research were to study the physical conditions of the Kayan catchment area, calculate the suspended sediment load, and to define the total sediment yield of Kayan River. Observation method were used in this research both of direct field observation as well as laboratory observation. Data acquired in this study were include of climatic data, geology, geomorphology, soil and land cover data. Besides also rain-fall data, temperature, river discharge and suspended sediment load. The total sediment yield were calculated by mean of mathematical and statistical analysis especially of linier regression analysis. The result of the research show that total the sediment yield of Kayan River with drainage area of 6,329.452 km² is about 236,921.25 m³/km²/year. The interesting result of the statistical analysis was that the existing negative correlation between river discharge and suspended sediment load. It is the effect of the location of discharge and suspended measurement. This condition caused by sea tide effect on river discharge at the apex delta. During high tide water river trend rising up on discharge but not on suspended sediment load. Instead, also existing setting down processes takes places of the suspended sediment load into the river bottom upper stream and the apex.
Rural Settlement Development and Environment Carrying Capacity Changes in Progo River Basin
Authors: Ritohardoyo Su , Priyono P
Published: August 2017

Generally the broader rural settlement the heavier population pressure on agricultural land. It indicates that carrying capacity of the rural environment threatened lower. The spatial distribution of the threat in a river basin is quite important as one of the river basin management inputs. Therefore, this article aims at exposing result of research about influence rural population growth and rural settlement land changes to environment carrying capacity. This research was carried out in the rural area in Progo river basin consists 56 sub districts (34 sub districts part of Jawa Tengah Province, and 22 sub districts part of Yogyakarta Special Region). The whole sub districts are such as unit analysis, and research method is based on secondary data analysis. Several data consist Districts Region in Figure 1997 and 2003 (Temanggung, Magelang, Kulon Progo, Sleman and Bantul) such as secondary data analysis. Data analysis employs of frequency and cross tabulation, statistics of regression and test. Result of the research shows that population growth of the rural areas in Progo river basin are about 0.72% annum; or the household growth about 3.15% annum as long as five years (1996-2003). Spatial distribution of the population growth in the upper part of the Progo river basin is higher than in the middle and lower part of the basin. The number proportion of farmer in every sub district area in this river basin have increased from 69.95% in 1997 to 70.81% in the year of 2003. It means that work opportunities broadening are still sluggish. However, the number proportion of farmers in the upper part of the Progo river basin is lower than in the middle and lower part of the basin. The rates of settlement land areas changes (0.32 ha/annum) as long as five years (1997-2003) is not as fast as the rates of agricultural land areas changes (0.47 ha/annum). Spatial land settlement areas changes in the lower (6.1 ha/annum) and middle parts (2.4 ha/annum) faster than upper part of the river basin, as a consequence the different accessibility to urban area. Environment carrying capacity of every sub district areas in this river basin becomes lower as long as five years (1997-2003). In the upper part of the basin however, the index of environment carrying data (0.13) higher than in the lower part of this river basin (0.09), especially in the several sub districts surrounding urban area. The environment carrying capacity of Progo river basin depends on the land settlement and the growth of household number changes. However, influence of the land settlement area changes is stronger than the growth of household number changes to the environment carrying capacity. This result of research shows that spatial and temporal characteristics of settlement environment degradation in the lower and middle parts wider than in the upper part of Progo river basin in the coming twenty five of years.