bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis and Design of Photovoltaic Nonlinear System: A Delta Operator Fuzzy Control Scheme
Authors: Lin He , Shao Zhenhua , Wang Xingyi
Published: January 2020

Aims:

The paper is concerned with the problem of robust H∞ output feedback control for
photovoltaic nonlinear system.

Background:

The PV systems are built to transform sun irradiance into electrical power. The dc-dc
converters, such as buck type, boost type, and buck-boost type, have been widely implemented in
the PV systems. Linear controllers for dc-dc converters are often designed based on mathematical
models. To get a desired performance objective, an accurate model is essential.

Objective:

There has been increasing interest in the scheme of digital controller design for dc-dc
converters. However, most of the research efforts are focused on the representation based on the
standard forward-shift operator approach, which are of inherently ill-conditioned when datum are
taken at high sampling rates. Compared with the forward-shift operator, the delta operator has many
virtues which can be applied as a better representation of the underlying physical model under high
sampling rates. Despite the delta operator possessing the superior high sample rate performance has
been recognized in the past two decades, there exists little literature discussing the analysis and synthesis
of photovoltaic nonlinear systems by using delta operator fuzzy control method, which motivates
us to make an effort in this topic.

Methods:

We propose a Fuzzy Dynamic Output Feedback (FDOF) controller, and introduce a novel
Lyapunov-Krasovskii Functional (LKF) in delta domain, the framework of robust H∞ output feedback
control is investigated.

Results:

Sufficient conditions are derived for the existence of the desired FDOF controllers in terms
of Linear-Matrix Inequalities (LMIs). A numerical example is used to illustrate the design procedure
of the present method.

Conclusion:

This paper has studied the problems of robust H∞ output feedback control for photovoltaic
nonlinear system with interval time-varying delay and parametric uncertainties. Based on the
formulated fuzzy system and the FDOF controller, we introduced a Lyapunov-Krasovskii function
in delta domain, the scheme of FDOF was proposed. Sufficient conditions for the existence of the
FDOF controller were derived in terms of LMIs. A numerical example was used to demonstrate the
effectiveness of our proposed methods.
Digital Health Coaching Programs Among Older Employees in Transition to Retirement: Systematic Literature Review (Preprint)
Authors: Stara Vera , Santini Sara , Kropf Johannes , D'Amen Barbara
Published: January 2020

BACKGROUND

The rapid increase of the aging population is pushing many national governments to reshape retirement legislation in order to extend older adults’ working life. Once retired, older adults can be invaluable resources for the community as family carers, as volunteers, or by returning to work. Healthy aging is one of the main conditions for being able to work longer and being active after retirement. The latter, indeed, represents a very sensitive life transition, which can entail psychological and social difficulties. Interventions for promoting older workers’ health and well-being and supporting the transition to retirement are on the top of the policy agenda of most European countries. Recently, computer-based and digital health interventions have been seen as promising means to reach this purpose.

OBJECTIVE

This systematic literature review aimed to explore studies on digital health coaching programs for older workers that followed a user-centered design approach and evaluated their effectiveness in providing older adults with guidance for adopting a healthy lifestyle and being active in the community.

METHODS

The search identified 1931 papers, and 2 relevant articles were selected by applying specific eligibility criteria.

RESULTS

To our knowledge, only few digital health coaching programs have targeted the population of older workers to date; there is an insufficient number of studies on the efficacy of such programs. The results show the difficulties of assessing the efficacy of digital coaching itself and with respect to older employees. The 2 studies suggest that digital health programs for workplaces can improve various aspects of older employees’ well-being; however, they considered health mainly from a physical perspective and neglected contextual, social, psychological, and cultural factors that can influence older workers’ health and general well-being. Future digital health coaching programs should adopt the healthy aging paradigm as a multidimensional lens for interpreting the impact of eHealth technology on aging and retirement. The literature around this issue remains at an embryonic state, and this gap needs to be filled by further investigations that apply a user-centered approach for designing the technology, test innovative research methodologies, and adopt new technical solutions for high-quality interaction design.

CONCLUSIONS

Further digital health coaching programs aimed at supporting healthy and active living for older workers and retirees are necessary. The user-centered design approach is recommended in order to fully address the users’ health needs and the technological requirements throughout development. Moreover, the healthy aging perspective allows inclusion of physical, social, and psychological factors influencing the transition from work to retirement, as well as the experiences and interactions of individuals with the technology.
Determining the Topic Evolution and Sentiment Polarity for Albinism in a Chinese Online Health Community: Machine Learning and Social Network Analysis (Preprint)
Authors: Bi Qiqing , Shen Lining , Evans Richard , Zhang Zhiguo , Wang Shimin , Dai Wei , Liu Cui
Published: January 2020

BACKGROUND

There are more than 6000 rare diseases in existence today, with the number of patients with these conditions rapidly increasing. Most research to date has focused on the diagnosis, treatment, and development of orphan drugs, while few studies have examined the topics and emotions expressed by patients living with rare diseases on social media platforms, especially in online health communities (OHCs).

OBJECTIVE

This study aimed to determine the topic categorizations and sentiment polarity for albinism in a Chinese OHC, Baidu Tieba, using multiple methods. The OHC was deeply mined using topic mining, social network analysis, and sentiment polarity analysis. Through these methods, we determined the current situation of community construction, identifying the ongoing needs and problems experienced by people with albinism in their daily lives.

METHODS

We used the albinism community on the Baidu Tieba platform as the data source in this study. Term frequency–inverse document frequency, latent dirichlet allocation models, and naive Bayes were employed to mine the various topic categories. Social network analysis, which was completed using the Gephi tool, was employed to analyze the evolution of the albinism community. Sentiment polarity analysis was performed using a long short-term memory algorithm.

RESULTS

We identified 8 main topics discussed in the community: daily sharing, family, interpersonal communication, social life and security, medical care, occupation and education, beauty, and self-care. Among these topics, daily sharing represented the largest proportion of the discussions. From 2012 to 2019, the average degree and clustering coefficient of the albinism community continued to decline, while the network center transferred from core communities to core users. A total of 68.43% of the corpus was emotional, with 35.88% being positive and 32.55% negative. There were statistically significant differences in the distribution of sentiment polarity between topics (P<.001). Negative emotions were twice as high as positive emotions in the social life and security topic.

CONCLUSIONS

The study reveals insights into the emotions expressed by people with albinism in the Chinese OHC, Baidu Tieba, providing health care practitioners with greater appreciation of the current emotional support needed by patients and the patient experience. Current OHCs do not exert enough influence due to limited effective organization and development. Health care sectors should take greater advantage of OHCs to support vulnerable patients with rare diseases to meet their evidence-based needs.
Perceptions and Opinions of Patients About Mental Health Chatbots: Scoping Review (Preprint)
Authors: Abd-Alrazaq Alaa A , Alajlani Mohannad , Ali Nashva , Denecke Kerstin , Bewick Bridgette M , Househ Mowafa
Published: January 2020

BACKGROUND

Chatbots have been used in the last decade to improve access to mental health care services. Perceptions and opinions of patients influence the adoption of chatbots for health care. Many studies have been conducted to assess the perceptions and opinions of patients about mental health chatbots. To the best of our knowledge, there has been no review of the evidence surrounding perceptions and opinions of patients about mental health chatbots.

OBJECTIVE

This study aims to conduct a scoping review of the perceptions and opinions of patients about chatbots for mental health.

METHODS

The scoping review was carried out in line with the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) extension for scoping reviews guidelines. Studies were identified by searching 8 electronic databases (eg, MEDLINE and Embase) in addition to conducting backward and forward reference list checking of the included studies and relevant reviews. In total, 2 reviewers independently selected studies and extracted data from the included studies. Data were synthesized using thematic analysis.

RESULTS

Of 1072 citations retrieved, 37 unique studies were included in the review. The thematic analysis generated 10 themes from the findings of the studies: usefulness, ease of use, responsiveness, understandability, acceptability, attractiveness, trustworthiness, enjoyability, content, and comparisons.

CONCLUSIONS

The results demonstrated overall positive perceptions and opinions of patients about chatbots for mental health. Important issues to be addressed in the future are the linguistic capabilities of the chatbots: they have to be able to deal adequately with unexpected user input, provide high-quality responses, and have to show high variability in responses. To be useful for clinical practice, we have to find ways to harmonize chatbot content with individual treatment recommendations, that is, a personalization of chatbot conversations is required.
A Digital Substance-Use Harm Reduction Intervention for Students in Higher Education (MyUSE): Protocol for Project Development (Preprint)
Authors: Dick Samantha , Vasiliou Vasilis S , Davoren Martin P , Dockray Samantha , Heavin Ciara , Linehan Conor , Byrne Michael
Published: January 2020

BACKGROUND

Digital interventions have been identified as a possible tool for reducing the harm caused by illicit drug use among students attending higher education (ie, college students). However, the success of interventions in this area has been hampered by a lack of user involvement and behavior change theory in their design. The My Understanding of Substance use Experiences (MyUSE) project combines a rigorous user-centered design (UCD) methodology and a robust behavioral change framework to develop a digitally delivered harm reduction intervention for illicit drug use among students in higher education.

OBJECTIVE

This project aims to design and develop a digital intervention that targets drug use–related harm among students in higher education.

METHODS

The MyUSE project will take place over 3 phases. The first phase was exploratory in nature, involving 3 systematic reviews, a large survey, and student workshops to gather a comprehensive evidence base to guide the project. The second phase is the development stage of the project, involving the use of the Behavior Change Wheel theoretical framework to determine the behavior change techniques of the intervention and the use of the UCD methodology to guide the development of the digital intervention. The third phase is the evaluation stage, whereby the intervention will undergo a 5-stage evaluation process to comprehensively evaluate its impacts.

RESULTS

The exploratory phase 1 of the MyUSE project was completed in December 2018. Phase 2 is currently underway, and phase 3 is due to begin in September 2020.

CONCLUSIONS

Higher education institutions (HEIs) are ideally placed to intervene and support students in the area of illicit drug use but are constrained by limited resources. Current digital interventions in this area are sparse and have several weaknesses. The MyUSE project combines a UCD approach with a robust behavior change framework to develop a digitally delivered intervention that is economically viable, effective in changing behavior, usable and acceptable to students, and able to sustain long-term implementation in HEIs.

INTERNATIONAL REGISTERED REPORT

DERR1-10.2196/17829
Evaluasi Kinerja Rotary Air Preheater dengan Metode ε-NTU pada Pengaruh Sudut Seal (Halaman 14 s.d. 17)
Authors: Tajudin Alhijri Wildan , Hady Ariwibowo Teguh
Published: January 2020

Rotary air preheater memanfaatkan gas buang sisa pembakaran pada boiler. Kalor gas buang dipindahkan ke matriks kemudian dipindahkan udara pembakaran. Efektifitas rotary air preheater dipengaruhi oleh sudut seal. Seal berfungsi sebagai pembatas antara aliran panas dan dingin. Efektifitas rotary air preheater dihitung menggunakan metode persamaan ε-NTU. Penggunaan metode ε-NTU memerlukan nilai koefisien perpindahan panas konveksi yang terdapat pada aliran panas maupun dingin. Untuk mendapatkan nilai koefisen perpindahan panas, analisa matriks tunggal dilakukan pada kondisi heat flux konstan. Sudut seal  aliran panas diatur tetap 30°, sedangkan pada aliran dingin diubah mulai dari 0° sampai 120°. Pengaturan sudut seal mempengaruhi luasan permukaan perpindahan panas pada matriks. Kecepatan aliran yang rendah memiliki waktu bersinggungan dengan matriks lebih lama sehingga laju perpindahan kalor meningkat. Pengaturan sudut seal aliran dingin 0° menghasilkan nilai efektifitas tertinggi yaitu 43,7% pada Cr* 24. Nilai efektifitas berbanding lurus dengan nilai NTU.
Penentuan Umur Sisa Pipa (Tube) Pada Pengilangan Minyak (Halaman 18 s.d. 22)
Authors: Mulyana Cukup , Hi Saad Aswad , Nurhilal Otong , Farhan Yusuf M.
Published: January 2020

Telah tejadi kerusakan pada pipa pemanas di sebuah pengilangan. Pipa terbuat dari baja karbon menengah. Kerusakan ditandai dengan pecahnya pipa baris 2 no 4 yang mengakibatkan terhentinya produksi. Setelah dilakukan kajian analisa kegagalan, penyebab utama kegagalan adalah short term overheat, sementara pipa di sekitarnya masih terlihat baik. Untuk menghindari kerusakan serupa pada pipa disekitarnya, dilakukan kajian  umur sisa dengan uji creep yang dipercepat dan uji korosi. Dari hasil uji creep dengan metoda Larson Miller pada temperatur 400ºC diperoleh umur sisa pipa di atas 100 tahun, pada temperatur 500ºC umur sisanya 24 tahun sedangkan pada temperatur 700ºC umurnya tinggal 1,33 jam. Di atas 700°C terjadi short term overheat. Dari hasil uji SEM dan EDAX ditemukan produk korosi FeO, SO3, ZrO2.  Dengan menghitung ketebalan minimum  yang diijinkan dan mengukur ketebalan pipa dengan UT diperoleh laju korosi 0,0067 mm/tahun, dan umur sisa pipa tinggal 21 tahun.
Analisis Pola Scaffolding Pada Tes Mata Pelajaran Fisika Untuk Mendeskripsikan Kemampuan Analogi Siswa Kelas IX SMP Negeri 13 Yogyakarta Tahun Pelajaran 2013/2014 (Halaman 43 s.d. 46)
Authors: Febryani Kurnia , Artha Kusumaningtyas Dian
Published: January 2020

Scaffolding yang diberikan dalam pengerjaan soal sangat penting untuk mendeskripsikan kemampuan analogi siswa. Penelitian ini dilakukan dikelas IX SMP Negeri 13 Yogyakarta Tahun Ajaran 2013/2014 pada materi gaya dan hukum newton. Penelitian ini menggunakan dua kelas dengan dua pola scaffolding yaitu pola scaffolding1 dan scaffolding2. Soal yang diberikan berjenis soal isomorfik dengan tipe deskriptif dan skema. Analisis data yang digunakan meliputi analisis uji instrumen dan analisis Oneway Anova uji Post-Hoc LSD. Hasil penelitian menunjukkan untuk soal deskriptif kelas yang diberikan pola scaffolding2 memiliki tingkat kemampuan analogi siswa lebih baik, yaitu sebesar 63%, pola scaffolding1 sebesar 56% dan kelas tanpa scaffolding sebesar 41%. Sedangkan untuk soal skema, kelas scaffolding1 memiliki tingkat kemampuan analogi siswa lebih tinggi yaitu sebesar 67%, scaffolding2 sebesar 63% dan tanpa scaffolding sebesar 43%. Uji post-hoc LSD menunjukkan adanya perbedaan yaitu antara kelas tanpa scaffolding dengan scaffolding1 sebesar 0,001 dan antara kelas tanpa scaffolding dengan scaffolding2 sebesar 0,000297.
Pengembangan Sistem Sensor Rasa Berbasis Membran Selektif Ion untuk Klasifikasi Buah Jeruk (Halaman 9 s.d. 13)
Authors: Surya Wibowo Bagas , Tazi Imam , Triyana Kuwat
Published: January 2020

Sebuah sistem sensor rasa dengan sifat selektivitas global atau yang lebih dikenal sebagai lidah elektronik (e-tongue) berbasis pada larik sensor ion-selektif membran (ISMS)telah dibuat dan diterapkan untuk menganalisis secara kualitatif tiga macam buah jeruk (jeruk peras, jeruk siam dan jeruk nipis). E-tongue dilengkapi dengan sistem pengenal pola berbasis principle component analysis (PCA). Enam jenis lipid yang digunakan untuk membuat membrane selektif ion terdiri atas: asam oleat (OA), dioktil phosphat (DOP), desil alkohol (DA), dodesilamin (DDC), dan metil amonium klorida trioctyl (Toma). Setiap membran selanjutnya dipasang pada bagian dari tabung teflon yang memiliki lubang pada ujungnya, sehingga bagian dalam silinder terisolasi dari luar. Ujung tabung tersebut disegel dengan stopper yang memegang kawat Ag / AgCl. Sistem akuisisi data dalam e-nose dibangun menggunakan mikrokontroler. Agar dapat digunakan, tabung-tabung tersebut diisi dengan larutan KCl dengan konsentrasi 100 mM. Berdasarkan analisis PCA, e-hidung dapat mengklasifikasikan semua pola respon dari empat rasa dasar, yaitu, kepahitan (MgCl2), asin (NaCl), asam (HCl) dan kelezatan atau umami (MSG), ditunjukkan oleh nilai total komponen utama (PC1 dan PC2) sebesar 95,1%. Selanjutnya, e-tongue juga mampu mengklasifikasi tiga jenis buah jeruk yang ditunjukkan oleh nilai total komponen utama sebesar 88,6%. Dengan demikian, e-nose memiliki peluang sebagai alat untuk kendali mutu pada industri minuman berbahan buah jeruk.
Problem Solving dengan Metode Identifikasi Variabel berdasarkan Skema: Tinjauan terhadap Formulasi Hukum Pertama Termodinamika
Authors: Suryantari Risti
Published: January 2020

Metode identifikasi variabel berdasarkan skema merupakan  salah satu metode problem solving dalam fisika terkait formulasi.  Metode ini telah diterapkan bagi formulasi kecepatan relativistik, serta panjang dan waktu relativistik. Pada penelitian kali ini akan diterapkan metode serupa bagi topik termodinamika,. Hukum Pertama Termodinamika melibatkan tiga variabel yaitu kalor, usaha dan perubahan energi dalam. Terdapat dua jenis proses dalam sistem termodinamika , yaitu kalor dan usaha diberikan pada sistem atau dihasilkan oleh sistem. Pada berbagai buku referensi, hal tersebut dicirikan dengan tanda positif dan negatif. Permasalahan yang ditemui adalah kemungkinan terjadinya kesalahan pada perhitungan, terutama jika  siswa tidak menentukan tanda positif atau negatif tersebut dengan benar. Skema akan membantu siswa dalam menyelesaiakan soal terkait formulasi ini, tanpa harus memikirkan tanda positif atau negatif pada variabel kalor dan usaha. Metode ini akan diterapkan pada contoh-contoh soal sederhana dan diimplementasikan terhadap mahasiswa Program Studi Fisika Universitas Katolik Parahyangan Bandung. Hasil penelitian menunjukkan seluruh mahasiswa dapat menyelesaikan soal dengan benar dan berpendapat bahwa metode ini lebih mudah untuk dipahami. Guru atau para pengajar fisika dapat menggunakan metode ini sebagai variasi dalam pembelajaran, sehingga formulasi tidak lagi dianggap sulit dalam fisika.
Pengaruh Jumlah Iterasi dan Nilai Parameter Relaksasi Terhadap Signal to Noise Ratio (SNR) pada Rekonstruksi Citra Metode SIRT (Halaman 13 s.d. 16)
Authors: Anam Choirul , Edi Widodo Catur
Published: January 2020

Kualitas citra hasil rekonstruksi metode Simultaneous Iterative Reconstruction Technique (SIRT) ditentukan oleh jumlah iterasi dan nilai parameter relaksasi (λ). Nilai λ ini biasanya diperoleh secara coba-coba. Penelitian ini bertujuan mengevaluasi pengaruh jumlah iterasi dan nilai λ terhadap nilai signal to noise ratio (SNR). Rekonstruksi menggunakan obyek fantom Shepp-Logan ukuran 50x50. Proyeksi dilakukan untuk setiap sudut 100menggunakan mode berkas paralel. Pertama ditentukan pengaruh jumlah iterasi terhadap SNR. Selanjutnya dilakukan penentuan nilai SNR untuk variasi  λ  pada jumlah iterasi tertentu. Diperoleh bahwa semakin banyak iterasi dan semakin besar nilai parameter relaksasi menghasilkan nilai SNR semakin tinggi, namun setelah iterasi dan nilai λ tertentu, nilai SNR mengalami saturasi. Citra dengan kualitas optimal (kekaburan dan stripping paling kecil), diperoleh pada iterasi antara 5 hingga 10 dan nilai parameter relaksasi antara 0,5 hingga 1.
Bentuk Fungsional Energi Elektron Bloch pada Potensial Periodik Semikonduktor (Halaman 31 s.d. 34)
Authors: Agustino Rinto , Farchani Rosyid Mochammad
Published: January 2020

Telah dilakukan kajian bentuk fungsional energi elektron Bloch pada potensial periodik dengan sistem terdistribusi Fermi-Dirac terdegenerasi.
Pemodelan Struktur Bawah Permukaan 3D Purwokerto dan Sekitarnya Berdasarkan Data Anomali Gravitasi Bouguer Lengkap
Authors: Indrarini Wulandari Feni , Setiawan Ari
Published: January 2020

Zona subduksi di selatan Jawa Timur merupakan bagian dari subduksi panjang yang terbentuk akibat tumbukan lempeng Indo-Australia dan Eurasia. Keberadaan subduksi tersebut menjadi menarik untuk dikaji karena turut mempengaruhi aktivitas gunungapi dan potensi bencana alam di daerah tersebut. Pengkajian zona subduksi dan gunungapi dilakukan dengan melakukan pemodelan struktur bawah permukaan menggunakan anomali gravitasi dengan bantuan program Grablox dan Bloxer. Pemodelan dilakukan terhadap data sekunder anomali regional, dan anomali lokal. Data anomali gravitasi diperoleh dari Bureau Gravimetrique Internationale (BGI). Pembuatan model dilakukan dengan teknik inversi menggunakan metode Singular Value Decomposition (SVD) dan optimasi Occam. Hasil penelitian menunjukkan adanya penipisan kerak samudera rata-rata dari 20 km menjadi 15 km ke arah utara. Penipisan tersebut disebabkan adanya lapisan mantel atas yang menonjol dan mendesak kerak yang disebut flexural bulge. Ketebalan batuan sedimen pada cekungan busur belakang sebesar 4; 50 km, dan semakin ke timur nilainya semakin berkurang. Keberadaan dapur magma pada busur gunungapi di Jawa Timur pada umumnya diperkirakan pada kedalaman 6 km.kata kunci: anomali gravitasi; zona subduksi dan gunung api, Grablox ;Bloxer; pemodelan anomaligravitasi
Deteksi Frekuensi Akustik pada Buah Kelapa Magelang (Cocos nucifera) Menggunakan Software Spectra PLUS-DT
Authors: Afiatun Nafi’ah Widhi , - Mitrayana
Published: January 2020

Penelitian tentang spektrum bunyi buah kelapa pada berbagai tingkat kematangan menggunakan Software SpectraPLUS-DT telah dilakukan. Penelitian ini dilakukan untuk mengetahui nilai frekuensi rerata buah kelapa dengan merekam bunyi ketukan buah kelapa pada berbagai tingkat kematangan buah menggunakan perekam yang telah diuji. Kemudian, bunyi ketukan tersebut dianalisis menggunakan Software SpectraPLUS-DT untuk mengetahui nilai frekuensi rerata. Setiap sempel buah kelapa ditimbang dan dikorelasikan dengan nilai frekuensi buah kemudian volume air serta ketebalan daging buah diukur. Hasil penelitian menunjukkan bahwa massa rerata buah kelapa pada tiga tingkat kematangan adalah (3,7 +- 0,7) kg, (3,2 +- 0,3) kg, (1,4 +- 0,2) kg, volume air rerata buah kelapa pada tiga tingkat kematangan adalah (697 +- 73) ml, (646 +- 82) ml, (305 +- 103) ml, ketebalan daging rerata buah kelapa pada tiga tingkat kematangan adalah (4,5 +- 1,0) mm, (8,1 +- 0,8) mm, (12,0 +- 0,7) mm, dan frekuensi rerata buah kelapa pada tiga tingkat kematangan adalah (79 14) Hz, (107 10) Hz, dan (150 +- 15) Hz. Hasil penelitian membuktikan bahwa nilai frekuensi buah mampu mengindikasikan volume air dan ketebalan daging buah kelapa.kata kunci: frekuensi; bunyi; kematangan buah kelapa; SpectraPLUS-DT
PETROFISIKA UNTUK ORGANIC SHALE, CEKUNGAN KUTAI BAGIAN ATAS, FORMASI BATU AYAU
Authors: Nouval Andre , Setyowiyoto Jarot , Anggara Ferian , Iskandar Yusup
Published: January 2020

Jumlah cadangan minyak dan gas bumi konvensional menjadi landasan atas studi sumberdaya migas non-konvensional, salah satunya adalah organic shale sebagai alternatif untuk memenuhi kebutuhan energi fosil yang masih sangat tinggi di Indonesia. Cekungan Kutai Bagian Atas merupakan salah satu cekungan yang cukup tua dan satu dekade terakhir dilirik sebagai target organic shale. Formasi Batu Ayau yang berada di Cekungan Kutai Bagian Atas merupakan target utama sebagai potensi sumber daya organic shale dibuktikan dengan hasil analisa geokimia serta perannya sebagai batuan induk dalam sistem petroleum konvensional di Cekungan Kutai Bagian Atas. Interval organic shale dari Formasi Batu Ayau berada pada asosiasi fasies delta plain dan delta front dengan terdapat dua interval prospek didalamnya (BA3 & BA2). Analisa dilakukan menggunakan data dua sumur MAAU-1 dan TENGKAWANG-1 di Blok B Cekungan Kutai Bagian Atas. Analisa petrofisika secara umum untuk memperoleh nilai shale volume sebesar 50-60 %, porositas 8-30 %, dan water saturation 60-70 %, hal ini kemudian diterapkan untuk identifikasi organic shale dengan mengoptimalkan penggunaan dari standard triple combo log. Pada organic shale petrofisika dilakukan untuk memperoleh hasil akhir besaran nilai TOC dan Brittleness Index (BI). Nilai TOC diperoleh dengan menggunakan metode Passey dengan diperoleh nilai 0.7-3.2 wt% dan nilai BI menggunakan metode Anderson yang diperoleh nilai 51-58 %. Dengan analisa tersebut diharapkan agar diperoleh hasil representatif dari kualitas organic shale berdasarkan metode petrofisika di Formasi Batu Ayau.
Persebaran TOC dan Porositas Total Menggunakan Seismik Inversi pada Shale Piniya, Cekungan Akimeugah, Papua
Authors: Wijayanti Janna Azizah , Setyowiyoto Jarot , Anggara Ferian
Published: January 2020

Migas non-konvensional saat ini mulai menjadi sumber energi yang penting mengingat menurunnya sumber migas konvensional secara global. Salah satu jenis migas non konvensional adalah hidrokarbon shale. Eksplorasi hidrokarbon shale akan menjadi sukses apabila analisis data awal dilakukan dengan baik. Data well log dan data seismik biasanya merupakan data utama dalam fase eksplorasi. Analisis yang dilakukan adalah analisis porositas total dan Total Organic Carbon (TOC). Analisis estimasi TOC akan menggunakan pendekatan petrofisika yaitu dengan metode Passey (1990). Dalam tulisan ini, fokus pembahasan adalah pada shale formasi Piniya sebagai reservoir non-konvensional yang merupakan anggota dari Kelompok Kembelangan, Cekungan Akimeugah. Dalam membuat model persebaran porositas total dan TOC, akan digunakan metode seismik inversi berupa model based. Hubungan empiris antara Impedansi Akustik (AI) dan parameter porositas total serta TOC akan digunakan dalam melakukan persebaran parameter, yaitu dengan mengubah cube seismik AI menjadi cube seismik porositas total dan TOC.Kata kunci : porositas total, TOC, inversi, piniya, akimeugah.
El constructo del negro en René Depestre y Achille Mbembe
Authors: García Martínez Mónica Raquel
Published: January 2020

A partir de los trabajos de René Depestre y Achille Mbembe, el artículo busca reconocer los procesos en los cuales las africanas, los africanos y sus descendientes en las Américas pasaron de una identidad impuesta en la época colonial el negro a la resignificación de la misma. Desde distintas disciplinas y contextos, Depestre y Mbembe identificaron los procesos de construcción del negro1 adentrándose en concepciones antropológicas, donde la idea de humanidad colapsa y se inauguran niveles de lo no humano. Esa deshumanización forzada, que implicó la esclavización de millones de personas provenientes de cientos de etnias del continente africano, es lo que está implícito en la identidad, primero impuesta y luego dignificada.
Daniel Inclán, Lucia Linsalata y Márgara Millán (coordinadores), Modernidades alternativas
Authors: Talavera Baby Natalia E.
Published: January 2020

El libro Modernidades alternativas es una propuesta política que nos invita a pensar
desde el lugar de la contingencia. Esto es, desde una posición abierta a la provisionalidad, al conflicto y a la confrontación de fuerzas colectivas que buscan
apropiarse del sentido de la vida en comunidad y que se desenvuelven en un trayecto que es, ante todo, histórico. Así, como señalan los autores, “lo realmente existente no tiene mayor derecho de ser lo que pudo ser” sino que “puede ser pensado también como siendo sólo en potencia” (Inclán y Millán, p. 11). Reflexionar desde esta propuesta nos permite considerar aquellos proyectos colectivos, actualmente sometidos e invisibilizados por la normatividad de fuerzas dominantes, como potencialidades que ponen en cuestión la promesa de un destino y que son capaces de reapropiarse y de reinventar su realidad vital, social y política.
IMPLEMENTASI PENGENDALIAN VEKTOR DBD DI PROVINSI JAWA TENGAH
Authors: Widiarti Widiarti , Setiyaningsih Riyani , Pratamawati Diana Andriyani
Published: January 2020

ABSTRACT 

Central Java Province is one of the provinces with considerable dengue cases in Indonesia. One of the strategic efforts that have been implemented is controlling mosquitoes with fogging and larviciding with temephos at water reservoirs. However, cases remain increase or outbreaks  occur in several districts/cities. The study was conducted to determine the causes of the high dengue fever cases in Central Java Province  as to improve the implementation of such programs. Data related to the implementation of vector control were collected from various sources. The results showed that the PSN program in several districts did not optimally run because the community did not routinely do it. Larviciding with temephos was only carried out in the event of outbreaks and in the endemic areas. Fogging, which should be implemented in two cycles, was generally implemented only in one cycle due to limited insecticides availability and wide area coverage. It can be concluded that the high dengue fever cases in Central Java Province was caused by the gap between the program and the implementation in the field.

Keywords: Dengue vector, larvaciding, sogging

 

ABSTRAK

Provinsi Jawa Tengah merupakan salah satu provinsi yang menyumbang kasus demam berdarah dengue (DBD) cukup besar di Indonesia. Salah satu upaya strategis yang telah dilakukan adalah mengendalikan nyamuk dengan pengasapan dan larvasidasi dengan temephos pada Tempat Penampungan Air (TPA). Upaya tersebut belum memberikan hasil yang optimal  karena masih terjadi peningkatan kasus atau Kejadian Luar Biasa (KLB) di beberapa kabupaten/kota. Kajian secara deskriptif dilakukan untuk mendapatkan gambaran permasalahan tingginya kasus DBD di Provinsi Jawa Tengah dalam rangka perbaikan dan  pengembangan kebijakan pengendalian vektor DBD. Data dan informasi yang dikumpulkan berupa dokumen yang meliputi pelaksanaan pemberantasan sarang nyamuk (PSN), larvasidasi yang dilakukan, fogging, dan data lain yang berkaitan dengan pengendalian vektor. Hasil kajian menunjukkan bahwa program PSN tidak berjalan optimal di beberapa kabupaten di Jawa Tengah karena masyarakat tidak melakukannya secara rutin. Larvasidasi dengan temephos hanya dilakukan pada saat terjadi KLB dan hanya di daerah endemis DBD. Fogging pada umumnya dilakukan hanya dalam satu siklus kehidupan vektor, yang mana seharusnya dilakukan dalam dua siklus. Hal ini disebabkan karena keterbatasan insektisida dan cakupan wilayah cukup luas. Dapat disimpulkan bahwa tingginya DBD di Provinsi Jawa Tengah disebabkan adanya kesenjangan antara program yang telah dicanangkan dengan implementasi di lapangan.

Kata kunci: Vektor DBD, larvasidasi, pengasapan
UPAYA PENINGKATAN PEMBERIAN ASI EKSKLUSIF DAN KEBIJAKANNYA DI INDONESIA
Authors: Safitri Amalia , Puspitasari Dwi Anggraeni
Published: January 2020

ABSTRACT
Breast milk is the best nutrition for infants aged 0-6 months because it contains all the nutrients needed for growth and development of the baby. But not all mothers realize this is evidenced by the low rate of exclusive breastfeeding. The purpose of this study is to know the efforts that have been made to improve exclusive breastfeeding and to review the policies that have been done by the government. The data were collected from literature studies and interviews with resource persons. The result of this study is maternal knowledge is a factor that much influence exclusive breastfeeding and efforts that have been done in the form of counseling, mentoring by family and hypnolaktasi. For the policy, the result is that the government has made a regulation that supports the implementation of exclusive breastfeeding but there has never been any monitoring and evaluation since its implementation is submitted to the local government. The conclusion of this study is that counseling on mothers and families is the most successful effort and proven successful in increasing the percentage of exclusive breastfeeding. Related policies in Indonesia need to be re-examined so that local governments are more concerned with the right of mothers in giving exclusive breastfeeding. 
Keywords: exclusive breastfeeding, counseling, policy
 
ABSTRAK
Air susu ibu merupakan nutrisi yang paling baik untuk bayi berusia 0-6 bulan karena mengandung semua unsur zat gizi yang diperlukan untuk pertumbuhan dan perkembangan bayi. Namun tidak semua ibu menyadarinya, hal ini terbukti dengan masih rendahnya angka pemberian air susu ibu (ASI) eksklusif. Tujuan dari kajian ini adalah untuk mengetahui upaya yang sudah dilakukan untuk meningkatkan pemberian ASI eksklusif serta mengkaji kembali kebijakan yang sudah dilakukan pemerintah. Data diperoleh dari kajian beerbagai literature dan wawancara dengan narasumber. Hasil dari kajian ini adalah faktor pengetahuan ibu merupakan faktor yang banyak mempengaruhi pemberian ASI eksklusif dan upaya yang sudah banyak dilakukan berupa konseling, pendampingan oleh keluarga dan hipnolaktasi. Untuk kebijakan didapatkan hasil bahwa pemerintah telah membuat peraturan yang mendukung pelaksanaan pemberian ASI eksklusif namun belum pernah ada monitoring dan evaluasi karena implementasinya diserahkan ke pemerintah daerah. Kesimpulan dari kajian ini adalah konseling atau penyuluhan pada ibu dan keluarga merupakan upaya yang paling banyak dilakukan dan berhasil meningkatkan minat ibu untuk pemberian ASI eksklusif. Sedangkan untuk kebijakan pemberian ASI eksklusif di Indonesia, tidak semua pemerintah daerah melaksanakan kebijakan tersebut dan belum ada sanksi bagi yang melanggar. [Penel Gizi Makan 2018, 41(1):13-20]
Kata kunci: air susu ibu (ASI) eksklusif, konseling, kebijakan
KUALITAS DAGING BEKU, DINGIN DAN SEGAR: PH DAN ZAT GIZI MAKRO
Authors: Ernawati Fitrah , Imanningsih Nelis , Nurjanah Nunung , Sahara Ema , Sundari Dian , Arifin Aya Yuriestia , Prihatini Mutiara
Published: January 2020

ABSTRACT
Beef is one of the animal livestock that contain nutrient with a good bioavalibility. The objective of the study was to evaluate the nutrient content of frozen, cold, and fresh beef. The material of the study was cube roll, chuck dan blade. The location of beef sampling was done in three traditional markets and three supermarkets by 2016. The design of the study was cross-sectional study. The observed variables were  market type, beef condition and beef section, while the dependent variable includes pH, proximat (water content, ash content, fat, and protein). The data were  analyzed by t-test and ANOVA. The results showed that nutrient content did not differ between frozen, cold and fresh beef in both traditional markets and supermarkets, except the protein. Protein content in cold beef was higher than frozen beef (p <0.05). Beef had a water content of 63,39-74,66 %; ash content 2,91-4,19 % dry weight; protein 54,42-79,18 % dry weight; fat 9,57-37,32 % dry weight and had a pH of 5,23-5,64. Fresh, cold and frozen beef that came from traditional markets and supermarkets still had a good quality. Freezing beef that does not exceed a month could  maintain the nutritional quality of beef.
 
Keywords: freezing beef, fresh beef, frozen beef, nutrient content
 
ABSTRAK
Daging merupakan salah satu bahan pangan asal ternak yang mengandung zat-zat gizi  dengan mutu yang sangat baik. Tujuan dari penelitian adalah untuk mengevaluasi kandungan zat gizi daging beku, dingin, dan segar. Desain penelitian adalah potong lintang. Lokasi sampling daging dilakukan di tiga pasar tradisional dan tiga pasar swalayan, pada tahun 2016. Variabel bebas terdiri dari jenis  pasar, kondisi daging, bagian daging, sedangkan variabel terikat meliputi  pH, proksimat (kadar air, kadar abu, lemak dan protein). Analisis data menggunakan uji T (t-test) dan analisis varians (ANOVA). Hasil penelitian menunjukkan bahwa kandungan gizi tidak berbeda antara daging segar, dingin, dan beku baik di pasar tradisional maupun swalayan, kecuali kadar protein. Kandungan protein pada daging dingin lebih tinggi dibandingkan daging beku (p<0,05). Daging memiliki kandungan air 63,39-74,66 %; abu 2,91-4,19 % berat kering; protein 54,42-79,18 % berat kering; lemak 9,57-37,32 % berat kering dan memiliki kadar pH 5,23-5,64. Daging segar, dingin dan beku yang berasal dari pasar tradisional dan pasar swalayan masih memiliki kualitas yang baik. Pembekuan daging yang tidak melebihi satu bulan dapat mempertahankan kualitas gizi daging.
 
Kata kunci:  daging beku, daging dingin, daging segar, pembekuan daging, kadar protein
Founder succession and firm performance in the luxury industry
Authors: Campa Domenico , Torchia Mariateresa , Marcheselli Chiara Rachele Caterina , Sargenti Patrice
Published: January 2020

Top management succession may be a real threat to the long-term profitability of companies, in particular when it involves the founder whose name also identifies their brand and their products. This is extremely important in the luxury sector where loyalty, trust and the image of brands in consumers’ minds may be affected by the succession process, especially when the founder has no direct heir to ensure continuity of the family firm. Through an analysis of three case studies, as well as a questionnaire distributed to active consumers of luxury products, this study aims to understand whether and how a brand can successfully survive after the death of its founder and whether the purchasing behaviour of customers changes after a founder succession takes place. Our findings reveal that the lack of a clear and structured succession plan may significantly threaten the survival of companies. In addition, our evidence indicates that the purchasing intention of luxury consumers is linked more to the bond and the values that they share with the founder than to the quality of the goods purchased. Accordingly, our results provide insights and suggestions concerning the optimal approach to follow when companies with heirless founders are planning a succession and highlights that the success and the survival of such entities is linked to consumers’ perceptions of the extent to which there are continuity and alignment between the values of the founder and those of their successors.
Structural breaks in finance growth nexus: the study of Indonesia
Authors: Mukhopadhyay Bidisha
Published: January 2020

This paper empirically investigates the finance-growth nexus for an annual data set of Indonesia during the last two decades. The purpose is to examine the causal relationship between financial development and economic growth in Indonesia and also to test the structural breaks in the finance-growth relationship to investigate the change in policy regimes. To examine the causal relationship between financial development and economic growth, the newly proposed ARDL bound testing approach by Pesaran et al. (1996) has been applied .The estimated results support the view of Lucas (1988) that finance doesnâ€™t matter for economic growth. Structural break is identified in the year 1997 in Indonesia with the estimated finance-growth relationship. The stability of the estimated relationship is examined with break-point Chow tests (F tests).
Value Added Tax & Export: the Case of Selected Countries around the World
Authors: Samimi Ahmad Jafari
Published: January 2020

The purpose of the present paper is to compare the impact of implementing Value Added Tax on Export of goods and services in selected countries. In this paper, we used four different indices for export; export of goods and services, export of goods and services (BOP), export of goods and services (annual % growth), export of goods and services (% of GDP) to investigate the sensitivity to different definitions .To do so, study concentrated on a sample of 140 countries that have applied Value Added Tax in their tax system from 1990 to 2008. Findings of the study based on Mean Difference Statistical Test in a two threeyear periods before and after introduction of VAT. In general, the results show that, in different indices, the impact of VAT on export is positive. Therefore, it is suggested that other countries have not yet introduced the VAT to reform their tax system by introducing the VAT.
Domestic Fuel Price and Economic Sectors in Malaysia
Authors: Brenda Hui-Siang JEE , . Chin-Hong PUAH , . Shazali ABU MANSOR
Published: January 2020

This study empirically examines the relation between the domestic fuel prices with the ten disaggregated economic sectors in Malaysia with the spanning of data from 1990:Q1 to 2007:Q4. We found that only three sectors (agriculture, trade and other services sectors) are cointegrated with the fuel price and fuel price does Granger cause these sectors. Despite the evidence of non-cointegrated in most of the economic sectors, fuel price able to influence these sectors over a longer period. Policy recommendation from this study includes the utilization of the renewable energy (RE) as a strategic plan is the long-term solution due to the high dependency and increasing demand of energy. While energy prices have experienced some correction in response to signs of slower global growth, sufficient government enforcement and support need to be established to facilitate successful renewable energy implementation in Malaysia.
The Dividend Policy in Manufacturing Sector of Pakistan: The Perception of Corporate Managers
Authors: Haleem Fazli , . Attiya Y. Javid
Published: January 2020

Using a survey approach, this paper examines the perceptions of managers of dividend-paying firms listed on Karachi Stock Exchange (KSE) on factors influencing dividend policy, issues relating dividend policy and the corporate governance practices. The survey shows that the most important factors that affect dividend policy are; the level of current earnings, the projection about the future state of the economy, the stockholders characteristics, concerns about the stock prices, need of current stockholders. From a practical perspective, there is little discrimination among the top ranked factors. All the surveyed firms formulate their dividend policies according the theoretical model of Lintner (1956). The survey also shows that there is no difference in responses about these factors with respect to various titles of the respondents such as chief financial officer or Chief Exceptive Officer. The survey also finds strong support for the life cycling theory followed by agency theory, signaling theory and the catering theory respectively. The survey also shows the presence of corporate governance practices in the surveyed firms.
Review of Management Challenges for the 21st Century
Authors: Ali Bakhtiar , . Jamila Khatoon Warsi , . Shoaib Bin Naeem
Published: January 2020

Its a Book review. Check out full PDF instead
Distinction between Informal and Unorganized Sector: A Study of Total Factor Productivity Growth for Manufacturing Sector in India
Authors: Bairagya Indrajit
Published: January 2020

Since its very onset, the concept and definition of the informal sector has been a subject of debate both at the national and international levels. Existing literature uses the terms â€˜informal sectorâ€™ and â€˜unorganized sectorâ€™ interchangeably. However, in India, the characteristics of enterprises in the informal and non-informal unorganized manufacturing sectors are different and, thus, it is not justifiable to consider the informal and unorganized sector interchangeably for the manufacturing sector. Thus, the objective of this paper is to test the hypothesis on whether or not the total factor productivity growth (TFPG) of the informal manufacturing sector is different from the non-informal unorganized manufacturing sector. TFPG is decomposed into technical efficiency change and technological change. Later, technical efficiency change is further decomposed by pure efficiency change and scale efficiency change. Results show that the average TFPG of the non-informal sector is higher than the informal sector. The informal sector heavily concentrates in own account small enterprises, whereas the non-informal unorganized sector concentrates only in directory manufacturing enterprises (DME). Due to large in size, DME avails the advantages of economies of scale, which, in turn, helps the units for more growth in terms of total factor productivity growth. The main reason for productivity decrease of the enterprises, besides technology regress and the lack of adequate investments, is the limitation of activities and scale along with the optimal allocation of resources. This study provides a basis on how policies can be designed for enhancing the total factor productivity growth of the informal sector.
Bidding Behaviors in eBay Auctions: Secret Reservation Price and Endogenous Entry
Authors: Jiao Feng
Published: January 2020

This paper analyzes the secret reservation price in eBay auctions. Under the assumptions of secret and public reservation price, the bidders choose the optimal bidding function and the seller selects equilibrium reservation price. This model argues that the choice of secret reservation price is rational for the seller, as they can generate higher revenue in certain conditions. It predicts that, under endogenous entry, secret reservation price leads to higher revenue since it attracts more bidders to the auction. This effect is more noticeable for luxury goods. However, secret and public reservation prices generate identical revenue for the seller if entry is exogenous. Furthermore, the results are supported by numerous recent empirical works.
Comparing the Volatility Clustering Of Different Frequencies of Stock Returns in an Emerging Market: A Case Study of Pakistan
Authors: Rafique Amir
Published: January 2020

This study compares the volatility behavior and variance structure of daily, weekly and monthly returns of the KSE-100 index. The study uses seventeen years data covering the period from 1991 to 2008. By employing ARCH (1) model, the study finds significant asymmetric shocks to volatility in the three series but the intensity of the shocks are not equal for all the series. The study finds that the statistical properties are also substantially different from one another. The stylized fact of volatility clustering is found in the market but is sensitive to the frequencies of data.