bluuebunny/crossref_metadata_2025 huggingface dataset:
PENDIDIKAN DAN PELATIHAN SISTEM INFORMASI GEOGRAFI UNTUK ANGGOTA MUSYAWARAH GURU MATA PELAJARAN GEOGRAFI DI KABUPATEN SUKOHARJO DAN KABUPATEN SRAGEN PROPINSI JAWA TENGAH
Authors: Cholil Munawar , Priyono Priyono , Hardjono Imam
Published: February 2020

Keberhasilan pembelajaran banyak dipengaruhi oleh kemampuan guru. Artinya, di pundak gurulah keberhasilan pembelajaran dibebankan. Sementara realitas yang ada dan terjadi di lapangan, ada kesan bahwa kemampuan guru masih rendah. Sebagian besar dari mereka masih berpredikat sebagai pelaksana kurikulum, bahkan diantara kegiatan-kegiatan yang mereka lakukan lebih bersifat rutinitas. Guru belum siap menghadapi berbagai perubahan, di samping terbatasnya akses pada materi pembelajaran mutakhir. Motivasi dan kesiapan belajar peserta didik juga rendah. Kurangnya waktu belajar, lingkup materi yang sangat luas, serta laju/akselerasi perubahan (change) di bidang ilmu, teknologi dan seni berjalan begitu cepat. Mata pelajaran geografi mulai tahun  ajaran 2008/2009 adalah salah satu materi ujian nasional, sehingga diperlukan peningkatan kualitas guru geografi untuk menunjang proses pembelajarannya. Pendidikan dan pelatihan SIG di kalangan guru-guru yang tergabung dalam Musyawarah Guru Mata Pelajaran(MGMP) Geografi, dengan peragaan dan praktek dibarengi simulasi GIS diharapan akan dapat memperlancar dan mempermudah proses pembelajaran geografi khususnya SIG. Bahwa melalui media pendidikan dan keterampilan SIG akan dapat terjalin kerja sama yang erat antara Fakultas Geografi dengan stake holder (sumber input mahasiswa baru) dengan harapan akan semakin meningkatkan minat belajar ilmu geografi di kalangan masyarakat, khususnya kepada peserta didik atau siswa-siswa smu tempat guru anggota MGMP Geografi tersebut bekerja . Hasil kegiatan ini adalah peserta Guru-guru Geografi  mampu membuat peta tematik yang merepresentasikan wilayahnya yaitu Kabupaten Karanganyar dan Kabupaten Sragen. Luaran peta tematik dalam bentuk hardcopy dan softcopy.
PENGUATAN LITERASI DI SEKOLAH
Authors: Superman Superman , Purmintasari Yulita Dewi , Agustina Rini
Published: February 2020

Pokok permasalahan yang dialami mitra dalam kegiatan pengabdian ini ialah masih rendahnya minat baca siswa, sarana kegiatan literasi di sekolah masih minim ditandai dengan belum adanya perpustakaan yang representatif. Tujuan dilakukannya pengabdian ini ialah untuk meningkatkan kapasitas serta tata kelola kegiatan literasi di sekolah. Metode yang digunakan ialah dengan pembenahan sarana fisik dan pelatihan tata kelola program GLS. Hasil dari kegiatan pengabdian ini siswa memiliki minat literasi dengan disediakannya pojok literasi di kelas dan dibuatkanya perpustakaan yang memadai bagi siswa untuk belajar di perpustakaan. Adanya pojok literasi dan perpustakaan mendorong terlaksananya Gerakan Literasi Sekolah di SMP Pancasila Sungai Kakap.
Role of Intracellular Ca2+-overload in Cardiac Dysfunction in Heart Disease
Authors: Nusier Mohamad , Ozcelikay A Tanju , K Shah Anureet , S Dhalla Naranjan
Published: February 2020

Various heart diseases such as genetically-determined heart failure, acute myocardial infarction, ischemia-reperfusion injury and catecholamine-induced cardiomyopathies are associated with cardiac dysfunction, cellular damage, subcellular derangements and metabolic alterations. Since increase in myocardial Ca2+ is accompanied by these abnormalities, it is generally held that intracellular Ca2+-overload plays an important role in the pathogenesis of cardiac dysfunction as well as cellular and metabolic defects in different cardiovascular diseases. This view is supported by observations in hearts subjected to Ca2+-paradox, where reperfusion of Ca2+-free perfused hearts with Ca2+-containing medium was found to produce a marked increase in myocardial Ca2+-content, cellular damage and cardiac contracture. The intracellular Ca2+-overload in the heart has also been shown to produce mitochondrial Ca2+-overload, depress ATP production, release different toxic substances and induce cardiomyocyte apoptosis. By virtue of its ability to depress cardiac gene expression and increase proteolysis of sarcolemma (SL) sarcoplasmic reticulum (SR) and myofibrils (MF), the intracellular Ca2+-overload has been reported to reduce SL, SR and MF protein content and activities. Such remodeling of subcellular organelles is associated with dramatic alterations in Ca2+ -handling by SL and SR membranes as well as interaction of Ca2+ with MF for the impairment of cardiac function. Thus, it is evident that mitochondrial Ca2+-overload, and subcellular remodeling for Ca2+-handling defects are responsible for the occurrence of cardiac dysfunction, metabolic derangements and cellular damage during the development of heart disease.
Paradigm Shift from Conventional to Islamic Banking System: A Case of the Conversion of Taqwa Islamic Banking in Pakistan
Authors: Ahmed Muhammad Mushtaq , Khan Javed , Fazl e Haq
Published: February 2020

The paradigm shift in banking industry from conventional to Islamic system of banking has been evident in previous decade. Conventional institutions are also either setting-up Islamic subsidiaries or converting conventional set-up into Islamic. The bank of Punjab started Taqwa Islamic Banking-(TIB) by converting its 1st branch into Islamic banking in 2012. In 2014, the bank completed one of the largest conversion project by converting 24 conventional into Islamic banking. In this paper, the regulatory guidelines of SBP in respect to conversion is discussed and procedure adopted by the bank of Punjab-TIB- is studied and analyzed. Practical complications and key problems faced by BOP-TIB and its possible solution is also presented. The study will provide a clear view of the conversion and the method adopted by BOPTIB. The study will further guide institutions intends to adopt conversion of its business from conventional model into Islamic model.
Correlation between the Anthropometric Measures and Performance of the Cricket Pull Shot- A Case Study of the Malaysian National Batsmen
Authors: Zia Ul Haq Muhammad , Habib Muhammad Badar , Nazeer Muhammad
Published: February 2020

This study was conducted to examine the correlation between the anthropometric measure and kinematic of pull shot. Eighteen cricket batsmen were recruited for data collection. The variables were recorded as stature, body mass, skinfolds, girths, bone lengths, breadths and physical strengths. The pull shots were recorded with two video cameras and Aerial Performance Analysis System (APAS) software for the kinematic of the pull shot. All kinematic were not significantly correlated with the pull shot performance except the bat angle. It was concluded that the girths and breadths of upper and lower limbs are associated with higher perforamnce of pull shot at the moment of batball contact. The wider arms help to maintain the body position to execute a successful pull shot. The extension of the knee, hip and elbows assist batsmen to keep body position against the short of length ball for an accurate pull shot.
EVALUASI IN VITRO-IN VIVO FILM TRANDERMAL DILTIAZEM HCL DENGAN PENINGKAT PENETRASI PEG 400 SEBAGAI ANTIHIPERTENSI
Authors: Windriyati Yulias Ninik , Fithria Risha Fillah , Kurniawati Fitria Dwi , Mukaromah Ulfa Risalatul
Published: February 2020

ABSTRACTDiltiazem HCL is an antihypertensive that low oral bioavailability of 40%, so developed to transdermal preparations. A matrix type of transdermal patch of diltiazem HCl was prepared using polyvinyl alcohol and ethyl cellulose with PEG 400 as penetration enhancer. In vitro-in vivo evaluation were conducted to asses drug permeation through the skin and determine the effectiveness of transdermal film as an antihypertensive drug. Transdermal patches of diltiazem HCl were evaluated for physicochemical characteristics weight variation, thickness, folding endurance, moisture uptake, and drug content. In vitro permeation study was conducted using commercial semi permeable membrane in Franz diffusion cell. In vivo activity study was evaluated on male rat Wistar that induced NaCl with CODA non-invasive blood pressure method. Transdermal patches of diltiazem HCl were found no significant differences in terms of physicochemical characteristics. The in vitro skin permeation profiles showed increased flux values with the increase of PEG 400 as a penetration enhancer. The in vivo evaluation showed a reduction in systolic and diastolic blood pressure within one hour after the drug administration. Diltiazem HCl was able penetration into skin, absorbed in blood circulation and effective as antihypertensive via transdermal route.Keywords : antihypertension, diltiazem HCl, PEG 400, transdermal patch
FORMULASI DAN KARAKTERISASI FISIK MASKER GEL PEELOFF EKSTRAK LENGKUAS (Alpinia galanga, (L.) Sw)
Authors: Sholikhah Mar’atus , Apriyanti Rahayu
Published: February 2020

ABSTRACT

Alpinia galanga (L.) Sw or galangal is widely used by Indonesian people as a spice in cooking.

The content of catechins and 1-acetoxicavicol acetate in the extract is known to have antioxidant

activity. The ability of these antioxidants needs to be applied to pharmaceutical dosage forms to

improve aesthetics and ease of use. One of the topical drug delivery systems that is in accordance

with the needs of the community today is the preparation of peel-off gel mask. The purpose of this

study was to determine the effect of variations in PVA gelling agent concentration as a mask base

on the physical characteristics of galangal extract peel-off gel masks. Three mask formulations

were made based on variations in the concentration of PVA in the range of 5% -15%. The physical

characterization of the preparations included organoleptic tests, homogeneity, pH, viscosity,

adhesion, dispersion, and drying time. Homogeneity and organoleptic parameters were analyzed

descriptively. The parameters of viscosity, drying time, pH, spreadability, and adhesion were

analyzed statistically using Anova Single Factor with a confidence level of 95%. The results

showed that the F1 and F2 formulas with PVA concentrations of 10% and 12.5% were the optimum formulas as a mask base. Based on statistical tests, variations in the concentration of PVA

significantly influence the parameters of mask adhesion with a p-value of 0.0001 (
SITUASI KEBAHASAAN DI WILAYAH PANGANDARAN (TELAAH PERGESERAN DAN PEMERTAHANAN BAHASA)
Authors: Herlina Eli
Published: February 2020

Bahasa adalah alat komunikasi yang hanya dimiliki manusia. Seiring perkembangan zaman, tidak menutup kemungkinan terjadi pergeseran bahasa.Pergeseran bahasa biasanya terjadi dalam komunitas bilingual atau multilingual yang disebabkan karena adanya kontak bahasa. Banyak faktor yang menyebabkan terjadinya pergeseran bahasa, antara lain pengaruh budaya global, migrasi, industrialisasi, perubahan ekonomi, urbanisasi, dan prestise. Oleh karena itu, peneliti tertarik untuk meneliti situasi kebahasan di wilayah wisata Pangandaran. Mengingat masyarakat Pangandaran adalah komunitas yang plural. Komunitas di Pangandaran tidak hanya didominasi oleh penduduk asli yang beretnis Sunda, tetapi juga para pendatang seperti dari Jawa, karena letak geografisnya yang berbatasan dengan wilayah Jawa Tengah. Selain itu, karena sebagian besar wilayahnya berupa pantai sehingga banyak para nelayan dari pulau lain yang datang dan menetap di Pangandaran.
PENGARUH KONSENTRASI DAN SUHU LARUTAN OSMOTIK TERHADAP PENYUSUTAN VOLUME, KEKERASAN DAN WARNA PADA BUAH NAGA
Authors: Spetriani  , Fathurahmi Siti
Published: February 2020

Osmotic dehydration is one of the methods in making of  intermediate moisture food. Osmotic dehydration is done by immersing the material in a osmotic solution in the form of a sugar solution. The purpose of this research is to investigate the effect of concentration and temperature of osmotic solution on volume shrinkage, hardness and color change during the process of osmotic dehydration of dragon fruit.Dragon fruit has been immersed in osmotic solution with varying concentrations of 30 oBrix, 50 oBrix, and 70 oBrix and a solution temperature of 30 oC, 40 oC, and 50 oC. The average value of the largest to the smallest volume shrinkage in succession is in the treatment of 70 oBrix, 50 oBrix, and 30 oBrix. The lowest level of material hardness during osmotic dehydration is found in the treatment of 70 oBrix and 50 oC (B3T3). The CIELAB diagram values ​​show that the average color of the material for all treatments is in the purple-red color column. Based on anova test, the difference in concentration and temperature of the solution did not have a significant effect on the discoloration of dragon fruit after osmotic dehydration.
ANALISIS PENYUSUNAN ANGGARAN DAN REALISASI BELANJA DAERAH PADA BADAN PERENCANAAN PENELITIAN DAN PENGEMBANGAN DAERAH KOTA MANADO
Authors: Mentang Fanda , Sabijono Harijanto , Pangerapan Sonny
Published: February 2020

Expenditure is one component that is of public concern in the Budget Realization Report. This study aims to: (1) find out the procedures for preparing the budget for the Manado City Regional Research and Development Planning Board (2) find out the consideration factors in preparing the budget for the Manado City Regional Research and Development Planning Board (3) Analyze the difference between the realization with a budget for the Manado City Regional Research and Development Planning Agency. The analytical method used in this thesis research is a descriptive method in which all data relating to the budget are collected to be analyzed and then drawn a conclusion. The results obtained show that the procedures for preparing the budget and the factors considered in preparing the budget are good, even in the implementation of the preparation are in accordance with the guidelines and the results of the analysis of variance (deviations) from the 2016-2018 fiscal year are still profitable because the realization is still lower than budgeted.
Threonine in mammals: indispensability and transamination
Authors: Malinovskiy Andrey
Published: February 2020

As is known, amino acid threonine is not synthesized in the vertebrates when it does not come with food and the decomposition of threonine under the action of threonine dehydratase is irreversible process. Some facts point to the presence of insignificant threonine synthesis in animals. The question arises about the possibility of biosynthesis of threonine in animals in the absence of it in food, that is, its interchangeability. Research on this issue is important for compiling the diet of animals. The article shows that the threonine cannot be synthesized by reversibility of the reaction of its decomposition as well why threonine dehydrogenase in the tissues of mammals cannot be used in threonine biosynthesis. It is concluded that some quantity of threonine is involved in transamination.
Non-Christian currents in modern Ukraine
Authors: Tytarenko Vita Volodymyrivna
Published: February 2020

Non-traditional religious entities are no longer a marvel on the territory of Ukraine. Some are on the margins, and some, including non-Christians, are quite active and talkative. Non-Christianity in religious literature means those religious trends that occur within traditional Christianity, modernizing it in the context of secularization of social consciousness, scientific and technological and information revolution, social and ecological cataclysms, and offering to man a spiritual and fundamental basis, which is a spiritual and spiritual basis, a world of answers to constant existential inquiries.
Nachman Bratslavsky and his interpretation of tsadicism as spiritual leadership in the context of Hasidic doctrine
Authors: Moskalenko L.M.
Published: February 2020

From the late 1990s, Hasidism in Ukraine has increasingly become a means of attracting mostly secular Ukrainian Jewry (104,000, according to the most recent All-Ukrainian Population Census), to religious and national values.

Every year, Ukraine becomes a center of pilgrimage for religious Jews from all over the world. About 20,000 Bratislava Hasidim come to Uman for the grave of their spiritual leader Nachman Bratslavsky. The pilgrimage attracts the attention of the media, the public and the media. Talking about the Bratslav Hasidic, they draw attention to the external attributes of this spiritual stream, to scandals related to burial and almost nothing - to the religious and philosophical meaning of Nachman Bratslavsky's teachings, to his socio-psychological and socio-cultural phenomenon. Elements of this doctrine have not yet been the subject of special studies by Ukrainian religious scholars. Meanwhile, in the West and in Israel, the spiritual heritage of Rabbi Nachman arouses the continued interest of philosophers, historians and anthropologists, and his works are intensively published and reprinted.
On the Question of the Philosophical-Theological Interpretation of the Institute of Monasticism, the Practice of Ascension and Asceticism in the Works of Domestic Thinking Monks
Authors: Klymov Valeriy Volodymyrovych
Published: February 2020

Monuments of spiritual and material culture of the Kievan Rus state, later periods of national history show that the general principles of Christian monasticism became known here at the same time as the first information about Christianity itself - first spontaneously, spontaneously, through the Greek colonies of Crimea, trade routes from the south, to the south. Greece, Macedonia and Serbia, and later, under the official baptism of Vladimir - through monasticism, clergy, hierarchs in Greek-Byzantine missions and the clergy settled in Kyiv cities - already as a conscious enyy and steady process of transferring the n soil of the new religion and its basic spiritual and material institutions.
Traditional Churches of Ukraine in the System of International Interreligious Dialogue
Authors: Fylypovych Liudmyla O.
Published: February 2020

International inter-religious dialogue is one of the directions of modern foreign policy of any church. Until recently, the latter was determined by narrow church interests. Due to the changes taking place in the religious sphere, in particular its globalization, which itself responds to the challenges of today, the field of external interests of the church extends to single-religious (say, the danger of non-religious proselytism) or even all-religious (for example, shared threat) clean water or planetary warming). Therefore, the list of tasks defined as elements of the church's international activity includes not only spiritual guardianship and protection of their believers abroad, missionary work among unbelievers and non-believers, pastoral visits to the diaspora, but also friendly communication with the brotherly churches, contacts with theologians spiritual leaders of other religions, consultations with prominent statesmen and public figures, scholars, politicians, representation in international interreligious associations, etc.
The Effects of Histone Deacetylase (HDAC) Inhibitors on FASN Intracellular Localization in Cancer Cells
Authors: Colvin Elizabeth , Liao Daiqing
Published: February 2020

Understanding mechanisms underlying cancer biology is crucial for discovering novel and effective therapies to improve patient outcome. Increased lipid production is a major metabolic feature in cancer. The fatty acid synthase (FASN) is a key enzyme for lipid synthesis and is upregulated in cancer. Although fatty acid synthesis is generally thought to take place in the cytoplasm, it has been reported that this enzyme also localizes to the nucleus in cancer cells. We hypothesize that the intracellular localization FASN could be a potential target to decrease lipid synthesis and ultimately halt cell proliferation. Protein acetylation has been shown to regulate protein intracellular localization. We aim to assess the impact histone deacetylase inhibitors (HDACi) have on the intracellular location of FASN with the goal of reducing de novo lipid production and cancer cell proliferation. We have examined intracellular localization of FASN in cells using immunofluorescence microscopy in cancer cells treated with HDACi and did not detect obvious HDACi-induced changes in FASN localization. FASN is also regulated by other mechanisms such as phosphorylation. Future studies will examine effects of kinase inhibitors on FASN intracellular localization.
Improving PM Collection of EPA Other Test Method (OTM) 36 Precutter
Authors: Udvardy Joshua
Published: February 2020

The Environmental Protection Agency (EPA) regulates the amount of particulate matter (PM) emitted by different industrial processes to protect human health and the environment. EPA Test Method 5 is the standard method to determine PM emissions from stationary sources. However, moisture present in emission sources can yield overestimated PM concentrations when using EPA Method 5. Alternatively, EPA Other Test Method (OTM) 36 regulates the method used for determining the concentration of PM2.5 emissions, which are particles with a diameter of less than 2.5 micrometers, from moisture-saturated stationary source gas streams. The EPA has found that the OTM 36 sampling train measures lower PM concentrations than actual concentrations in the emission source. This is because the sampling train’s precutter nozzle, which is the first instrument of a sampling train placed into an emission source, collects particles at smaller sizes than intended, preventing these particles from being measured by the sampling train. The purpose of this research is to create a new precutter nozzle design that allows the PM sampling train to more accurately measure PM to reflect actual concentrations in emission sources tested by OTM 36. By using computational fluid dynamics (CFD) simulations in ANSYS Fluent program, the collection efficiency of different dimensions of the new precutter nozzle was calculated to choose the best design that more accurately collects PM. Based on this objective, a precutter nozzle with a 7-degree half-cone angle and 3-cm throat length was chosen as the most viable design.
Teacher School Mental Health Literacy Survey: A Validation Study
Authors: Mastrorio Courtney R. , Trainor Kathryn M. , Splett Joni W.
Published: February 2020

Since teachers play an instrumental role in identifying students with social-emotional or behavioral (SEB) concerns, there is a need to assess and improve teachers’ knowledge in relation to children’s mental health.  This study examines the psychometric properties of one such measure Teacher School Mental Health Literacy Survey (TSMHLS) within a sample of pre-service teachers (n = 38.) The survey assesses the mental health literacy of teachers as it relates to students and within the classroom context. Data analyses were run to explore the internal reliability, discriminant validity, and feasibility of the survey. Analyses indicate moderate to high reliability (Cronbach’s alpha=.743), providing psychometric support for the use of the TSMHLS with pre-service teachers. Pre-service teachers’ discrimination between clinical symptomology and typical development was significant, providing further support for the survey’s use in understanding pre-service teachers’ knowledge of SEB concerns. Finally, feasibility was assessed through average completion time for the online survey (24 minutes), and results indicate that the survey could be feasibly implemented during pre-service teacher training. These findings lend support to the TSMHLS as an appropriate measure to evaluate pre-service teachers’ knowledge of student mental health.
Pink Filter: Gender Effects in Meaningful and Meaningless Product Differentiation
Authors: Vincent de Urquiza Camila , Cooke Alan
Published: February 2020

A simple Google search of the term “Pink Tax” pulls up thousands of results regarding “the cost of being a female consumer.” There is a belief that women’s products are priced more highly than men’s products to reap the benefits of women preferring female-targeted products. We sought to determine the prevalence of these beliefs and the efficacy of such marketing practices. We consider the impact of both meaningful (e.g., different product features) and meaningless (e.g., labelling) differentiation on consumers’ attitudes towards products. We propose that women have become skeptical towards meaningless product differentiation directed towards them. Whereas they respond favorably to products that target women through different ingredients and functionality, they respond more negatively to products that target women purely through packaging. We specifically looked at response to three products: sunscreen, razors, and protein bars and manipulated each product to isolate the effects of product features vs. the product advertising. Results were then measured to determine if different types of gender marketing affected women more strongly than they affected men. The results of this research have implications for product marketing campaigns and for public policy.
The LBO-SBO Relationship
Authors: Brockman Keegan Parker
Published: February 2020

Since the beginning of the private equity industry in the 1980s, it has evolved and adopted new strategies and methods for generating returns to investors. As the industry grew, deals became harder to find as the buyer market grew immensely and what deals remained appeared picked over. Enter the secondary buyout (SBO). This strategy involves one financial sponsor buying a portfolio company from another financial sponsor. This thesis attempts to fill a gap in the field of research in two ways. First, this thesis analyzes the difference in value creation using a longitudinal and matched-sample approach. This approach is unique in that I will only analyze data for which information on the SBO, the preceding LBO, and the following exit are all available. Second, this thesis looks specifically at the relationship between LBOs and SBOs in an attempt to provide a practical application of the analysis. Additionally, most studies stray away from performing analysis on the U.S. market due to the limited data availability, but this approach ignores one of the largest private equity markets in existence. This thesis will look solely at U.S. buyouts. I find no significant difference in the relative change in enterprise value from acquisition to exit for LBOs or SBOs. Further, there is a statistically significant negative relationship between the holding period and annualized change in EV for both LBOs and SBOs. Finally, while the results were not significant, there is a slight negative relationship between the EV change of LBOs to the EV change of SBOs.
Extracellular Vesicles Support the Survival of Serum-dependent cells in vitro
Authors: Mikhael Christy , Holliday Shannon , Han Guanghong
Published: February 2020

Extracellular vesicles (EVs) are 30-150 nm in diameter and are released by cells into the extracellular environment. They facilitate intercellular communication and may be involved in cell survival. Although serum-dependent cells are not obviously affected by depletion of EVs from the serum, we previously reported that cells in serum that contain EVs were more resistant to the drugs, enoxacin and bis-enoxacin, compared to cells in serum without EVs. This change in resistance led us to examine whether EVs are sufficient to maintain serum dependent cells in vitro. Here, we tested the effect of EVs on the survival RAW 264.7 cells and on 4T1 murine breast cancer cells. EVs were isolated by differential centrifugation. EVs were counted over various time periods. Cells were grown in alpha or Dulbecco’s minimal essential media supplemented with FBS, EVs from various sources, or with no supplements. Cell growth was determined by cell counts. In media without supplementation, the RAW 264.7 cells and 4T1 cells died by three days. Media supplemented with EVs from FBS allowed the cells to survive in the absence of FBS for one week or more.  Being able to perform experiments on cells supported by EVs will simplify the interpretation of experiments. Efforts are underway to determine their mechanism by which EVs support cell survival.
DBS Artifact Removal Through Template Subtraction
Authors: Vazquez Marco Emilio , Opri Enrico , Parks Brandon , Aysegul Gunduz
Published: February 2020

Deep Brain Stimulation (DBS) typically results in the formation of large signal artifacts in electrophysiological recordings in the surrounding regions of the stimulated area. This can prove to be problematic, as it makes the study of physiological responses in Local Field Potentials (LFPs), and consequently Event Related Potentials (ERPs) quite challenging. Research has been done in attempts to attenuate the effects of these large artifacts through various ways, most commonly through blind suppression, function fitting, template subtraction, and adaptive filters. However, many of these methods have proven to only be useful within the context of surface recordings (EEGs) and not for LFPs. In our research, we utilize template subtraction and extend it to the context of LFPs, in an attempt to uncover more effectively the underlying physiological responses to DBS.
Pembangkit Listrik Electron Power Inverter (EPI) Dengan Memanfaatkan Buah Belimbing Wuluh Dan Kulit Pisang
Authors: Widyaningsih Wiwik Purwati
Published: February 2020

Aki merupakan alat yang dapat menyimpan energi listrik dalam bentuk energi kimia. Aki banyak digunakan pada kendaraan bermotor dan untuk menyalakan lampu rumah saat terjadi pemadaman. Komponen aki terdiri dari elektroda dan elektrolit. Cairan elektrolit aki yang digunakan yaitu cairan asam sulfat (H2SO4) atau biasa disebut aki zuur. Penelitian ini bertujuan untuk memanfaatkan campuran buah belimbing wuluh dengan kulit pisang sehingga dapat dijadikan pengganti alternatif elektrolit yang ramah lingkungan. Metode yang digunakan adalah menentukan perbandingan persentase volume dari buah belimbing wuluh dengan kulit pisang sehingga dapat menghasilkan tegangan DC dan arus yang maksimal kemudian diubah menjadi tegangan AC dengan menggunakan inverter. Perbandingan campuran buah belimbing wuluh dan kulit pisang dengan perbandingan 90%:10%;80%:20%;70%:30%. Aki dengan persentase buah belimbing wuluh dan kulit pisang 90% : 10% merupakan aki terbaik yang mempunyai ketahanan waktu selama 24 Jam dengan nilai tegangan sebelum dibebani yaitu 12,1 Volt, tegangan setelah dibebani yaitu 7,8 Volt dan arusnya sebesar 0,019 Ampere. Sedangkan 5 box aki menggunakan inverter dengan persentase 90% : 10% menghasilkan gelombang AC dengan tegangan 1,8 Volt ketika dibebani menjadi 1,4 Volt dengan arus listrik 0,0186 Ampere ketika beban 75 Ohm.
Solar Tracking Dual – Axis Berbasis Arduino Uno Dengan Menggunakan Lensa Fresnel Guna Meningkatkan Efisiensi Pengfokusan Cahaya Matahari
Authors: Margana Margana
Published: February 2020

Solar Tracking Dual-Axis Berbasis Mikrokontroler dengan Menggunakan Lensa Fresnel Guna Meningkatkan Efisiensi Pemfokusan Cahaya Matahari ini merupakan sebuah alat yang dirancang untuk mengarahkan Solar cell ke cahaya matahari. Alat ini bekerja dengan menggunakan 4 buah sensor LDR (Light Dependent Resistor) dan dua Motor Servo MG996 sebagai aktuator/penggeraknya. Sistem ini dikendalikan oleh Arduino Nano yang menjalankan program yang ditanamkan oleh software Arduino IDE (Integrated Development Environment). Hasil pengujian menunjukkan perbandingan tegangan dan arus yang dihasilkan Solar cell, sehingga dapat dihitungan nilai daya yang dihasilkan. Daya maksimum pada Solar Tracking (Pmax) dengan menggunakan lensa Fresnel sebesar 6,865 Watt dan tanpa lensa Fresnel sebesar 5,987 Watt. Pada Solar Tracking dengan menggunakan lensa Fresnel nilai efisiensinya sebesar 68,65 % dan tanpa lensa Fresnel nilai efisiensinya sebesar 59,9 %. Dari hasil tersebut menunjukkan bahwa efisiensi yang dihasilkan Solar cell dengan lensa Fresnel lebih baik dibanding tanpa menggunakan lensa Fresnel.
水利水电工程中电气自动化的应用
Authors: 宫 晓辉
Published: February 2020

人民日常生活的维持以及国家经济的稳定发展都离不开水利水电工程这一重要保障,而保证水利水电工程的正常运行就是对电气自动化的应用,电气自动化技术除了确保水利工程的安全、稳定运行,同时还能实现工程自动化的运转目标。本文就电气自动化如何应用到水利水电工程中的问题进行了探讨。
刍议水利水电工程建筑施工技术与管理
Authors: 吴 卫民
Published: February 2020

随着我国城镇化水平的不断提高,水利水电工程也得到了前所未有的发展动力和前景。在当前发展趋势下水利水电工程更应该沿着时代发展的方向,向着更高水平的工程质量发展,不断创新和发展新技术新材料,不断提升我国的水利水电项目的工程质量,进而提升其经济效益和社会效益。作者也是针对我国目前的水利水电项目发展现状展开了深入的分析并相应的提出了一系列的改进方案,希望对我国的水利水电工程发展有所帮助。
水利堤防工程施工及其质量管理的探讨
Authors: 纪 雯中
Published: February 2020

堤防工程可以缓解暴雨造成的洪涝灾害,因此其对水利建设、城市安全的防护工作发挥着至关重要的作用,同时,堤坝工程质量的优劣也与水利工程发挥的效益紧密相关。为了积极响应国家的号召,全力做好民生的保障工作,杜绝堤坝建造过程中的偷工减料行为,推动堤坝工程的科学建设,国家则需加强对堤坝工程建设工作的管理,制定相对完善的质量监督管理体系,做好防洪防涝的充分保障工作。
水利工程建设中的土方填筑施工分析
Authors: 张 海标
Published: February 2020

水是国家主要能源之一,为国家经济发展做出巨大贡献。同时也与人们安全紧密相关,为了进一步提高工作质量,要从防渗与加工技术方面入手,积极引入先进加固措施,以确保水利工程施工水平不断提高。
超超临界汽轮机设备常见故障及处理方法
Authors: 王 亚江
Published: February 2020

目前我国引进消化生产的超超临界1000MW机组均由上海电气、东方电气和哈尔滨电气三大动力集团公司生产,上海电气生产机型为引进德国西门子技术,东方电气生产机型为日本日立公司技术,哈尔滨电气生产机型为日本东芝技术。目前各发电厂使用口碑均认为上海电气西门子机型优于日立和东芝,本课题主要研究方向以上海电气生产1000MW机型为主。本文首先以上汽超超临界机组为例对汽轮机本体及主要参数做了全面的介绍,然后就汽轮机设备常见故障进行原因分析,并提出了处理方法。可为同类型机组的日常维护及定期检修提供技术参考和指导。
探析渠道渗漏的影响因素与防渗施工要点
Authors: 张 玲
Published: February 2020

农业灌溉节水的重点在于做好渠道防渗工作,但是目前很多灌区渠道工程出现了程度不同的渗漏情况,因此需要合理进行防渗施工。基于此,本文阐述了渠道防渗施工的优势特点以及影响渠道工程渗漏的主要因素,结合某渠道工程,对渠道防渗施工要点进行了探讨分析,旨在保障渠道工程的有效运行。
大型灌区现代化建设探讨
Authors: 金 汉林
Published: February 2020

本文从用水管理、供水方式与信息化建设、生态环境几个方面分析了我国大型灌区现状,大型灌区存在的问题以及大型灌区进行现代化建设的必要性,结合我国大型灌区实际情况,阐述了大型灌区现代化建设思路。
水利水电工程施工质量控制要点的相关研究
Authors: 方 振飞
Published: February 2020

水利水电工程是我国社会发展中的基础设施之一,并发挥着十分重要的作用,如防涝灌溉、防洪防旱[1]。在水利工程项目建设过程中,水利施工质量管理部门需要引进先进的工程质量管理手段,大力推广并创新先进技术,提高水利水电工程项目建设的整体质量,文章主要研究了水利水电工程施工质量控制要点。
分析灌区节水改造工程中的渠道防渗关键技术
Authors: 王 克黎
Published: February 2020

基于对灌区节水改造工程中渠道防渗关键技术的探讨研究,本文以某灌区节水改造工程为例,首先对工程概况进行了简要介绍,在提出灌区节水改造工程渠道防渗改建方案的基础上,对提高灌区节水改造工程渠道防渗水平的策略展开分析。与此同时,文章还包括灌区节水改造工程渠道防渗施工的技术要求,希望能为有关人士提供帮助。
刍议农村饮水安全
Authors: 张 文鹏
Published: February 2020

农村经济的发展虽然最大改进了农村居民的生活水平与经济条件,但接踵而至的工业污染、生活污染乃至供水不能获得保障等,对农村生活饮水供水造成了许多安全隐患,饮水工程的管理工作也因此而受到了影响,这对农村居民身体健康与生命安全都产生了极大的威胁。显而易见,研讨目前饮水问题是非常有必要的。基于此,本文就农村饮水安全进行探究。
水利工程运行管理的影响因素及对策
Authors: 张 晓东
Published: February 2020

水利工程是国家经济发展的基础工程直接关系着国计民生,其运行管理在很大程度上影响着水利工程的使用年限、综合效益的有效发挥。在现代化社会的发展中,相关部门需要加大水利工程运行管理力度,提高水利工程运行管理的整体效率。但是,在我国水利工程运行管理过程中仍存在一系列问题,相关人员需要对其中的影响因素进行分析,总结相应的对策予以解决,文章主要对水利工程运行管理的影响因素及对策进行了研究。
关于农田水利排水沟设计要点
Authors: 张 涛
Published: February 2020

针对农田水利排水沟设计需要考虑的因素,如合理确定排水沟底宽与水深、明确排水沟校核滞涝要求、满足沟道灌溉引水校核要求等等,进行多角度分析,并简要介绍排水沟设计原则,如因地制宜设计原则、生态学设计原则等,提出提升农田水利排水沟设计水平的途径,希望可以给相关工程项目提供良好借鉴。
解析水利水电工程移民长期补偿机制与新农村建设的有效契合
Authors: 阿迪力 尼扎木 •
Published: February 2020

本文简要分析了传统以土安置水利水电工程移民方式存在的缺陷,论述了水利水电工程移民长期补偿机制的基本概念,以及其中存在的各类问题与诱因,之后提出切实可行的移民长期补偿机制与新农村建设协调发展策略,以供借鉴。
绿色发展理念下水电站标准化建设管析
Authors: 张 兆雄
Published: February 2020

加强水电站标准化建设,既是提升水电站建设与运行质量的内在要求,也是提升水电站经济、社会与生态效益的必由路径。基于绿色发展理念,应通过强化标准化意识、确立标准化目标、发挥标准化效益,推动水电站标准化建设与高质量发展。
玛纳斯河流域水土流失格局及其空间结构分析
Authors: 钟 强
Published: February 2020

玛纳斯河流域水土流失以微度为主,占区域面积的77.62%,强度水土流失呈斑点离散分布；土地利用对土壤侵蚀具有显著意义,水土流失量与旱地、园地、裸地和建设用地结构比呈正相关,与草地、林地呈负相关关系。Moran’s I表明,微度水土流失区空间自相关性好、结构性稳定,应是区域水土流失防控法重点。
水利水电工程施工现场安全管理
Authors: 张 洪彬
Published: February 2020

水利水电是一项民生工程,具有综合性、复杂性等特点,若是在施工中发生安全事故,不但会影响工程施工进度,也可能会造成重大经济损失,甚至是造成人员伤亡,所以必须加强水利水电工程施工现场安全管理。本文阐述了施工现场安全管理重要性,以及安全管理的基本原则,并分析了安全管理影响要素,然后提出了几点加强水利水电工程施工现场安全管理对策。
关于对抽水泵站降低能源单耗的措施及维护探讨
Authors: 翟 建锋 , 杨 艳
Published: February 2020

东雷抽黄灌区已运行四十余年,我们已经改造了部分落后高耗能的水泵电机及配套的高低压配套设备,为灌区可持续发展奠定基础。
对中小型水电站运行管理提高经济效益方法的探讨
Authors: 万 雅男
Published: February 2020

本文首先介绍了中小型水电站运行管理中存在的主要问题,主要问题包括开发过程较为随意,造成大量的资源浪费；运行管理混乱,容易出现安全隐患；盲目进行投资,造成工程融资困难。文章紧接着分析了对提升中小型水电站经济效益的建议,主要内容包括根据项目实际需求合理选择使用设备；根据河流状况引用不同水系的流量提升效率；根据上游水资源状况合理组建水电站运行体系；推动新技术的应用,提升水电站运行管理成效；选择经济性高的开发方案,有效的进行无功补偿。
河道采砂防洪建设双收益
Authors: 张 钧锋
Published: February 2020

砂石资源是经济社会建设和发展不可缺的国有资源之一。河道采砂与河道行洪安全关系十分紧密,疏浚性采砂,疏通河床,理顺河势十分必要。“治理与经营兼顾、疏浚与采砂结合”原则,渭河宝鸡段构建“政府主导,国有经营,统一管理”的采砂管理经营新模式,河道疏浚,砂石料供应充分,防洪建设双收益。
水位遥测系统在水情测报中的运用研究
Authors: 郑 军
Published: February 2020

由于水汛的到来,一般情况下,会在防洪预警中发挥出显著的作用,如水位遥测系统的作用,从而实施水情自动预测和报警,其成为现阶段水利水库管理机构的主要工作。通常在水库上游河道建立超声波自动水位遥测系统,并且进行定时定点的预测与报警,把相关的数据与信息快速的传输到监控中心,进而可以提高预测和报警的准确性。根据这一情况,本文首先分析了遥测系统在水库河道水情测报中发挥的主要作用,接着对水位遥测系统的基本组成结构进行相应的阐述,最后分析了具体的应用,希望给相关人士带来一定的借鉴意义。
原子荧光光度法测定水中硒的精密度偏性试验分析
Authors: 杨 苗苗
Published: February 2020

精密度偏性试验是实验室内质量控制的基础实验。采用空白检验、加标回收、变异检验、总标准差检验等精密度偏性试验方法对原子荧光光度法测定硒的准确性与精密度进行评价,并绘制质控图以分析试验数据的受控状态。结果表明：该方法测定硒不受水体干扰物质及环境条件的影响,实验人员具备相应的检测水平,检测数据准确可靠,整个分析过程均在质量控制范围内,说明实验室具备了相应的质量管理能力。
Aplicações das Nanopartículas Lipídicas no Tratamento de Tumores Sólidos: Revisão de Literatura
Authors: Correia de Oliveira Lidiane , Fleury Taveira Eliseu José , Gomes Souza Leonardo , Neves Marreto Ricardo , Martins Lima Eliana , Fleury Taveira Stephânia
Published: February 2020

Introdução: Os nanocarreadores lipídicos são sistemas utilizados para direcionar fármacos especificamente para seu sítio de ação e têm atraído bastante atenção da comunidade científica por serem biocompatíveis e biodegradáveis. Esses sistemas podem direcionar fármacos para os tumores sólidos, possibilitando uma liberação prolongada no sítio de ação e, com isso, ampliando a utilidade da quimioterapia antineoplásica. Objetivo: Revisar a literatura disponível sobre os estudos in vivo envolvendo nanocarreadores lipídicos contendo fármacos citotóxicos, voltados ao tratamento de tumores sólidos. Método: Pesquisa realizada na base de dados PubMed®, no período temporal de 2007 até 2011, utilizando os descritores: liposomes; lipid nanoparticles; cancer; in vivo; com o operador booleano and entre eles, em inglês. Resultados: Foram encontrados 1.595 trabalhos relacionados com o uso de lipossomas e 77 relacionados as nanopartículas lipídicas. Poucos trabalhos tem relatado a avaliação in vivo das nanopartículas lipídicas (28 trabalhos), comparado ao observado para os lipossomas (472 trabalhos), desde que os lipossomas foram desenvolvidos duas décadas antes das nanopartículas lipídicas. Quatro medicamentos com lipossomas já estão aprovados e são utilizados na clínica, ao passo que apenas uma preparação com nanopartículas lipídicas esta sob investigação clínica, em fase I. Conclusão: De forma geral, o número de trabalhos relativos ao uso da nanotecnologia para o tratamento do câncer tem aumentado rapidamente, tornando importante saber diferenciar os diversos tipos de nanocarreadores e, principalmente, conhecer quais já estão em uso na clínica. Existem poucos estudos clínicos com os nanocarreadores lipídicos, entretanto esses sistemas apresentam enorme potencial para melhorar a prática clínica na oncologia.
Cardiotoxicidade nas Terapias Neoadjuvante e Adjuvante do Câncer de Mama
Authors: Pina Livia Christina de Oliveira , Axelband Flavia , Barbosa Maria Fernanda , Silva Mario Jorge Sobreira da
Published: February 2020

Introdução: O câncer de mama é o mais comum entre as mulheres em todo o mundo, representando quase 25% de todos os casos de câncer. Alguns fármacos possuem características peculiares relacionadas à cardiotoxicidade. Objetivo: Analisar a incidência, as características clínicas e os fatores de risco associados à ocorrência de cardiotoxicidade em pacientes submetidas ao protocolo doxorrubicina e ciclofosfamida seguido ou não de taxanos e naquelas que realizaram o mesmo protocolo associado ao trastuzumabe. Método: Trata-se de um estudo de coorte realizado em um hospital público do Rio de Janeiro. Foram incluídas 153 pacientes que iniciaram tratamento entre os meses de setembro e novembro de 2012. A cardiotoxicidade foi definida com base nos critérios do Cardiac Review and Evaluation Committee e da Sociedade Brasileira de Cardiologia. Foi calculado o risco relativo (RR), utilizando-se um intervalo de confiança (IC) de 95%. Resultados: A incidência de cardiotoxicidade foi de 17%. Observou-se queda da fração de ejeção do ventrículo esquerdo em 31,3% e 52,2% das pacientes nos grupos human epidermal growth factor receptor-type 2 (HER-2) negativo e positivo, respectivamente. Foram identificados três casos de insuficiência cardíaca, sendo dois em pacientes HER-2 positivas. As pacientes que utilizaram trastuzumabe apresentaram maior risco de desenvolver cardiotoxicidade (RR=3,53; IC 95%: 1,84-6,79) em comparação com as mulheres do grupo HER-2 negativo. Conclusão: Foi possível verificar a ocorrência de casos de cardiotoxicidade em ambos os grupos com maior incidência para o grupo HER-2 positivo.
Importância da Prática de Atividade Física para Prevenção do Risco de Cardiotoxicidade: Revisão Sistemática
Authors: Dos Santos Corrêa Marcos Vinicius , Soares Marcos da Cunha Chermont Sergio Luiz , Abelin Saldanha Marinho Tatiana , Pena Quintão Mônica Maria
Published: February 2020

Introdução: A cardiotoxicidade pode afetar de forma direta a capacidade funcional, a ventilação pulmonar e a força muscular e, também, de forma indireta, outros órgãos e sistemas. O exercício físico é sugerido como uma estratégia não farmacológica efetiva e de baixo custo para minimizar ou prevenir dano miocárdico associado ao tratamento com antraciclinas. Objetivo: Discutir os efeitos do exercício físico em pacientes com risco para cardiotoxicidade pós-tratamento oncológico com quimioterapia e/ou radioterapia. Método: Realizada pesquisa nas bases de dados SciELO, PEDro e PubMed, nos idiomas português e inglês, por artigos científicos publicados entre 2007 e 2018. Resultados: Foram encontrados 256 abstracts foram selecionados para uma leitura na integra por atenderem aos critérios de inclusão, 25 artigos foram excluídos por não se enquadrarem nos critérios de inclusão e somente nove apresentaram associação dos efeitos do exercício na presença de cardiotoxicidade. Conclusão: A melhora do consumo máximo de oxigênio (VO­­2­ max/pico) e da distância percorrida em 6 minutos (DP6M) foi mais evidente no treinamento contínuo e, assim como no exercício resistido, permaneceu por médio e longo prazo. As medidas da DP6M e do VO­­2­ max/pico e de ausência foram os parâmetros indicativos de melhora.
Insuficiência Cardíaca no Paciente Oncológico: Preditores de Risco
Authors: Abelin Tatiana , Jose Pereira Renni Marcos
Published: February 2020

Com o avanço das novas terapias em oncologia, um número considerável de pacientes sobreviventes ao câncer permanece em atendimento em nossas unidades de saúde, em razão dos efeitos deletérios desses tratamentos ao miocárdio. Descritos como cardiotoxicidade (CDTX), esses efeitos são considerados quando ocorre uma queda da Fração de Ejeção (FE) pelo ecocardiograma (ECOTT) em mais de 10%.  As terapias utilizadas podem promover insuficiencia cardíaca (IC), hipertensão arterial, arritmias ou outros mecanismos cardiotóxicos ainda não completamente compreendidos.  Muito tem sido estudado e discutido a respeito, no intuito de identificar biomarcadores preditores desse dano miocárdico, bem como novas terapias que permitam não só tratar aqueles indivíduos acometidos, como também que o paciente permaneça em condições de submeter-se ao seu tratamento oncológico. Do mesmo modo, ainda não existe um escore de risco específico e universal que possa predizer com maior confiabilidade os pacientes mais suscetíveis ao desenvolvimento de IC secundária ao uso de quimioterápicos, apesar dos esforços das diversas sociedades envolvidas com a Cardio-Oncologia. Avanços tecnológicos viabilizaram a utilização do exame de ECOTT, incluindo os parâmetros de deformidade miocárdica por meio do strain 2D, que permite uma avaliação mais precoce do dano miocárdico, comparado ao exame convencional. Precisa-se de um “escore de risco” específico para predizer a CDTX capaz de detectar lesões subclínicas passíveis de intervenção e que permita reverter esse dano cardíaco em uma fase mais inicial.
Avaliação do Risco Nutricional de Pacientes Oncológicos Atendidos no Ambulatório da Unacon em um Hospital de Referência por meio da ASG-PPP
Authors: Da Silva Mota Elenise , Marques Monteiro Regina Cely , Siqueira Menezes Keyce Lianne
Published: February 2020

Introdução: O câncer e uma doença crônica multicausal, caracterizando-se pelo crescimento desordenado, rápido e invasivo das células, alterando o seu material genético. Esta associado a diversas alterações no trato gastrintestinal, podendo levar o paciente a desnutrição e a caquexia. Objetivo: Avaliar o risco nutricional, utilizando a Avaliação Subjetiva Global produzida pelo Próprio Paciente (ASG-PPP) de pacientes oncológicos em tratamento quimioterápico. Método: Estudo transversal, analítico, realizado com pacientes em tratamento quimioterápico atendidos no ambulatório com dados coletados da ASG-PPP. Resultados: Dos 78 pacientes analisados, a maioria era do sexo feminino (68,82%) com idade entre 54+15 anos. Os tumores prevalentes foram do esôfago e gástrico (23,08%) e mama (23,08%). As pacientes com tumor localizado na mama (52,38%) apresentaram náuseas, vômitos e os odores provocavam enjoo. Observou-se que um percentual importante de pacientes relatou que estava comendo menos do que o normal, 44,83% do sexo masculino e 32,64% do sexo feminino. Na analise do risco nutricional, o risco critico foi recorrente entre os pacientes do estudo, sendo o grupo do tumor no rim o de maior participação (100%). Não houve diferença significativa na avaliação do diagnostico nutricional (p<0,05), entretanto, foi verificado que grande parte dos pacientes apresentou algum tipo de necessidade de intervenção nutricional ao unir as três primeiras categorias. Conclusão: A realização da avaliação e do acompanhamento nutricional nos pacientes pode evitar ou minimizar os efeitos das alterações decorrentes da doença, proporcionando um impacto positivo na  qualidade de vida do paciente oncológico.
Narguilé: o que sabemos?
Authors: Tavares de Moraes Atty Adriana
Published: February 2020

O livro, resultado de uma parceria entre a Organização Pan-Americana da Saúde, a Organização Mundial da Saúde e o INCA, reuniu evidências científicas sobre o narguilé e as organizou em 15 capítulos.
Contribuições dos Métodos de Revisão para o Desenvolvimento do Conhecimento Científico em Oncologia
Authors: Sobreira da Silva Mario Jorge , Lopes Tavares de Lima Fernando
Published: February 2020

Desde janeiro de 2018, a Revista Brasileira de Cancerologia (RBC) vem reestruturando sua política editorial com o intuito de ampliar o conhecimento científico em oncologia, assegurando a disseminação de manuscritos com qualidade. Neste sentido, ao longo de 2019, o Conselho Editorial da RBC optou por publicar apenas artigos de revisão que utilizem métodos “sistematizados” de pesquisa. A escolha do tipo de revisão depende dos objetivos do autor e do objeto de estudo. Uma vez tendo definido o modelo de revisão “sistematizada”, é fundamental que os autores sigam os parâmetros definidos na literatura, buscando assim a desejada qualidade no relato científico. Esperamos que as orientações fornecidas neste editorial possam fomentar a submissão de estudos com o uso de revisões “sistematizadas” para a RBC nos próximos anos.
Dividend Policy and Share Price Volatility Among Insurance Companies Listed at Nairobi Securities Exchange
Authors: Chepngetich Rono Carolyne , Omoro Nixon Oluoch
Published: February 2020

The major objective of any firm is to maximize the shareholders wealth. This is evidence through dividend yield and payout ratio and this encapsulate into the dividend policy of a company. The research purpose aimed at examining the influence that dividend policy has on the volatility of share prices among the listed insurance corporations in Kenya. Research design, approach and method: Data was collected from listed insurance corporations over a 10-year period with a total of 49 data points. The Pearson correlation and ordinary regression analysis were employed. The results reveal the existence of a positive link among the study variables. The correlations were found to be substantial at ninety-five percent confidence level. It is worth noting that the model summary shows forty-three-point one percent of changes in the volatility of stock price are explicated by dividend yield and payout ratio. ANOVA statistics which examines whether the analytical model as set out in the study explains variations in the dependent variable concluded that the model is analytically substantial. The outcome revealed a statistically significant positive link between stock price variations and the ratio of dividend payout. Research also established a statistically substantial negative interrelation between volatility of stock prices and dividend return. Results therefore recommend that companies should have dividend policies which are mapped to shareholders wealth maximization objective. The study suggests further studies be undertaken to determine whether there exists an analytically substantial difference between the dividend policies of various sectors in the economy.