bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of the relationship between the age of the rams and the quality of their ejaculates obtained outside the breeding season
Authors: Andreeva Madlena , Stefanov Rossen
Published: January 2021

The present study aims to research the effect of age on the quality of
ejaculates of rams from Synthetic population of Bulgarian dairy breed. Rams
divided into two age groups were used for the experiment: G1 (2.5 years)
versus G2 (6 years). Ejaculates were obtained by the method of artificial
vagina and diluted with medium 6A-G. The tested ejaculates were obtained
outside the breeding season. A Sperm Class Analyzer (SCA Microptic,
Barcelona, Spain) was used to study sperm motility. The biochemical activity
of the enzymes lactate dehydrogenase (LDH) and gamma-glutamyl transferase
(GGT) was determined using an automatic Mindrai BA88 spectrophotometer. The
activity of the enzymes was studied in sperm plasma, in aqueous and tritonic
extract. Significant differences between the groups were found in total
sperm motility (P?0.05) and LDH enzyme activity in sperm plasma (P?0.01).
Regarding the efficiency of the LDH enzyme in aqueous and tritone extract,
no significant differences between the groups was found. No significant
differences were found between groups for GGT activity, while age had
significant impact on LDH enzyme in sperm plasma.
A discussion on a Pata type contraction via iterate at a point
Authors: Karapınar Erdal , Fulga Andreea , Rakocevic Vladimir
Published: January 2021

In this paper, we introduce the notion of Pata type contraction at a point
in the context of a complete metric space. We observe that such contractions
possesses unique fixed point without continuity assumption on the given
mapping. Thus, is extended the original results of Pata. We also provide an
example to illustrate its validity.
Perturbation theory, M-essential spectra of operator matrices
Authors: Abdelmoumen Boulbeba , Yengui Sonia
Published: January 2021

In this paper, we will establish some results on perturbation theory of block
operator matrices acting on Xn, where X is a Banach space. These results are
exploited to investigate the M-essential spectra of a general class of
operators defined by a 3x3 block operator matrix acting on a product of
Banach spaces X3.
Systems of k Boolean inequations and a Boolean equation
Authors: Marovac Ulfeta , Bankovic Dragic
Published: January 2021

In this paper elementary generalized systems of Boolean equations are
investigated. The formula for solving systems of k Boolean inequations and a
Boolean equation is presented. This systems have many applications in
computer science for solving logical problems. Presented formulas can
accelerate application of elementary generalized systems of Boolean
equations.
Convolution of two harmonic mappings in the right-half plane
Authors: Wu Dongdong , Chen Xingdi
Published: January 2021

This paper is to give a univalent criterion and a geometric property of the
convolution of two right half-plane harmonic mappings f0(z) and f (z), where
f0(z) is canonical and the second complex dilatation w(z) of f (z) is of the
form w(z) = - z-a/1-az z-b/1-bz.
Volterra-type operators from F(p,q,s) space to Bloch-Orlicz and Zygmund-Orlicz spaces
Authors: Liang Yuxia , Zeng Honggang , Zhou Ze-Hua
Published: January 2021

In this paper, we discussed the equivalent conditions for the boundedness
and compactness of several Volterra-type operators acting from general F(p,q,s) space to Bloch-Orlicz and Zygmund-Orlicz spaces.
Aqueous extract of strawberry (Fragaria x ananassa Duch.) leaves as a stabilizing agent in the synthesis of bio-active silver nanoparticles
Authors: Stevanovic Marija , Stanojevic Ljiljana , Danilovic Bojana , Stojanovic Sanja , Najman Stevo , Cakic Milorad , Cvetkovic Dragan
Published: January 2021

The aim of the presented work was to investigate the potential of aqueous extract of cultivated strawberry (Fragaria x ananassa Duch.) leaves for stabilization of silver nanoparticles (AgNPs-E) synthesized at room (RT) and boiling temperature (BT). The synthesis and stability of AgNPs-E were monitored by UV-Vis spectroscopy confirming high stability of the AgNPs-E in the dark at room temperature. The Fourier-transform infrared spectra suggest that molecules containing oxygen and nitrogen functional groups (NH, (NH)C=O, CNO, C-O-C and OH) participate in the reduction and stabilization of formed nanoparticles. As determined by the DPPH test, AgNPs-E synthesized at RT exerted higher antioxidant activity as compared to AgNPs-E synthesized at BT (EC50 values of 0.025 and 0.039 mg cm-3, respectively). Also, the AgNPs-E synthesized at RT exerted higher antibacterial activity against Escherichia coli, Staphylococcus aureus, Listeria monocytogenes, Bacillus subtilis and Bacillus luteus. Examination of the AgNPs-E on HeLa and MDCK cell lines showed concentration-dependent and cell line specific effects on the cell viability as evaluated by the MTT test. The obtained results indicate that synthesized AgNPs-E can be used as a base material in production of pharmaceutical preparations for potential skin applications.
COVID-19, mobility and self-isolation. Experiences of the Serbia’s citizens in the times of global pandemic
Authors: Pesic Jelena
Published: January 2021

The COVID-19 pandemic caused by the SARS-Cov-2 virus and closing the state
borders across the world led to the mass return of the citizens of Serbia
immediately before and after the declaration of the state of emergency in
March 2020. The measure of placing under health supervision and the
obligation of self-isolation, were the key means of mobility management in
the situation of the health crisis in Serbia. How were the given measures
implemented? How did they affect the citizens who returned to the country?
What resources did they have at their disposal and in what way did they meet
their basic needs during self-isolation? How was their experience of
self-isolation shaped by public media perceptions of diaspora by
representatives of the authorities and by their own social environment
during the state of emergency? The aim of this paper is to answer these
questions relying on the results of the online survey of 305 returnees,
conducted during April and May 2020 by the researchers from the Institute
for Sociological Research of the Faculty of Philosophy in Belgrade.
Cultural and spiritual significance of nature: guidance for protected and conserved area governance and management
Authors: Verschuuren Bas , Mallarach Josep-Maria , Bernbaum Edwin , Spoon Jeremy , Brown Steve , Borde Radhika , Brown Jessica , Calamia Mark , Mitchell Nora , Infield Mark , Lee Emma
Published: January 2021

The cultural and spiritual significance of nature has been defined as the spiritual, cultural, inspirational, aesthetic, historic and social meanings, values, feelings, ideas and associations that natural features and nature in general have for past, present and future generations of people – both individuals and groups. These guidelines respond to a growing need to make conservation more inclusive, effective and socially just by accommodating multiple worldviews; by treating natural and cultural heritage as interlinked; and by suggesting ways for engaging and empowering all relevant groups and stakeholders in protected area design, governance and management. The guidelines also assist with creating common ground, resolving conflicts and implementing rights-based approaches that recognise human rights and legal pluralism.
STATE-RECOGNIZED MARRIAGE AND LIBERAL NEUTRALITY
Authors: Reitan Eric
Published: January 2021

While Ralph Wedgwood has recently argued that state recognition of marriage can be justified in a way consistent with the demands of political liberalism, Clare Chambers argues that such a policy violates the politically liberal state’s requirement of neutrality with respect to diverse reasonable conceptions of the good—and she thinks Wedgwood’s case to the contrary relies on a “lax” reading of the neutrality requirement, not the “strict” reading that preserves political liberalism’s distinctiveness. I argue that there is a way of reading Wedgwood that sees his defense of state-recognized marriage as attempting to meet the requirements of strict neutrality—a reading that sees state recognition of marriage as a “neutral facilitating policy,” that is, a policy that helps marriage-affirming reasonable doctrines overcome a disadvantage they would face (relative to other reasonable doctrines) absent policy intervention by the state. I conclude, however, that a state policy that refuses to recognize polyamorous marriages may not qualify as a neutral facilitating policy, and hence that Wedgwood’s argument may fail to support the policy regime he favors but might support a more permissive marital policy.
DO DIVISION PUZZLES PROVIDE A REASON TO DOUBT THAT YOUR ORGANISM WAS EVER A ZYGOTE?
Authors: Hershenov David , Hershenov Rose
Published: January 2021

A number of philosophers maintain that the destruction of an embryo in the first 2 weeks after fertilization is not morally problematic as it is metaphysically impossible for any human organism to then have existed. We contend that the typical adult human organism was once a zygote so there is no metaphysical shortcut to justify early abortion. We show that five arguments against human organisms ever having been zygotes fail. All of the arguments have to do with one variant or another of the zygote or early embryo dividing. They do not provide any reason to believe that since some adult organisms are not identical to zygotes due to earlier divisions, none could have been.
Central Nervous System Infections
Authors: Caulfield Anna Finley , Blackburn Brian G.
Published: January 2021

Central nervous system (CNS) infections are associated with a high morbidity and mortality. Fortunately, the incidence of acute community-acquired bacterial meningitis has declined with the advancement and implementation of vaccination programs over the past 30 years. Treatment with corticosteroids, along with initial antimicrobial therapy, has also decreased the morbidity and mortality of patients with acute Streptococcus pneumoniae meningitis in developed countries. Molecular diagnostic testing may become a helpful tool to identify bacterial pathogens for targeted treatments. This review covers common CNS infections with a focus on the diagnosis and initial management of the adult patient suspected of having acute meningitis and encephalitis. 
Key words: acute meningitis, brain abscess, chronic meningitis, encephalitis, ventriculitis
Substance Use Disorders
Authors: Moeller F Gerard
Published: January 2021

There is a consistent body of evidence showing that substance abuse and dependence can worsen preexisting medical conditions, can temporarily mimic medical and psychiatric disorders, and can themselves cause medical problems, including life-threatening overdose. Substance use disorders are common in young and middle-aged persons: the lifetime prevalence of these syndromes, including alcoholism, is over 20% for men and about 15% for women. This chapter discusses dependence, abuse, substance use disorder, and substance-induced disorders involving depressants, stimulants, opioids, cannabinoids, hallucinogens, N-methyl-D-aspartate (NMDA) receptor channel blockers, and inhalants. Epidemiology, etiology, pathophysiology, diagnosis (including clinical assessment and laboratory tests), and treatment are reviewed. Treatment of intoxication, overdose, withdrawal, and rehabilitation is discussed. A figure illustrates the neurocircuitry of addiction. Tables describe the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) diagnostic criteria for abuse and dependence; frequently misused drugs; neural effects of commonly abused drugs; the natural history of drug dependence; conditions affecting the outcome of urinary drug tests; and pharmacologic options for treatment of drug overdose.
This chapter contains 1 figure , 6 tables and 112 references
Alteration of Biodiesel Properties and Automotive Diesel Engine Performance due to Temperature Variation of the Transesterification Process
Authors: Widjanarko Dwi , Kusumaningtyas Ratna Dewi , Fathoni Ahmad Afwan
Published: January 2021

This study aimed to examine the effects of transesterification reaction temperature on the biodiesel properties and diesel engine performance. Biodiesel properties evaluated in this work included viscosity, density, and methyl ester content. Meanwhile, the diesel engine performance testing comprised the examination of the engine’s torque and power. The research was conducted in several stages, viz. producing biodiesel from fresh cooking oil with variations in transesterification temperature of 45℃, 55℃, and 65℃; testing the characteristics of biodiesel produced; blending biodiesel with petroleum diesel to result in B30 biodiesel fuel; and testing biodiesel fuel (B30) in diesel-engined vehicles. It was revealed that the higher transesterification temperature led to the lower biodiesel viscosity, the decreasing value of biodiesel density values, and the higher methyl ester content. Furthermore, it was also demonstrated that increase of the transesterification temperature resulted in the higher value of torque and power generated. However, compared to the petroleum diesel fuel (B0), biodiesel fuel (B30) exhibited the lower values of the engine’s torque and power. The highest average values of torque and power of B30 fueled diesel-engine were 108.11 Nm and 43.51 kW, respectively, provided by the biodiesel produced at the transesterification reaction temperature of 65℃.of 65℃.
Electroanalytical Performance of Graphene Paste Electrode Modified Al(III)-TiO2 Nanocomposites in Fipronil Solution
Authors: Nurdin Muhammad , Arham Zul , Rahayu Sri , Agus Salim La Ode , Maulidiyah Maulidiyah
Published: January 2021

The new composite material Al(III)-TiO2 has been synthesized and applied as a modifier of graphene paste electrode for the determination of fipronil pesticide by cyclic voltammetry. The methods were to synthesis of Aluminum-Titanium dioxide (AT), preparation of graphene paste electrode with mass varied Al(III)-TiO2 (GAT) (0.05 g, 0.1 g, 0.2 g), and fipronil electroanalytic respons. Addition of Al(III)-TiO2 to the graphene paste electrode shows redox properties which are well characterized by a fast electron transfer process. Based on the results of measurements in a solution containing fipronil, it is known that fipronil is oxidized at a potential value of 0.26 V. Furthermore, the fipronil oxidation process on the GAT surface is influenced by diffusion control, this is powered by R2 value 0.91 when plotted between peak oxidation currents (Ip­a) vs. root scan rate. Other results show that measurement linearity is in the range 0.01 to 0.09 µg/L with a limit of detection (LOD) value of 0.0164 μg/L. Moreover, GAT shows good stability in the determination of fipronil with% RSD equal to 5%.
Preparation and Characterization of Activated Carbon Made from Robusta Coffee Skin (Coffea Canephora)
Authors: Raihan Raudhatul , Setiawan Adi , Hakim Lukman , Muhammad Muhammad , Arif Muhammad , Hosseiniamoli Hadi
Published: January 2021

Indonesia is one of the coffee-producing countries where production tends to increase from year to year. Currently, residuals from coffee-fruit processing such as coffee-skin and husks are thrown away without any use and this biomass residual contains several toxic chemicals such as alkaloids, tannins, and polyphenols. One of potential uses of coffee-industry by-product is to make activated carbon (ACs), which is made through a carbonation process and followed by an activation process. In this study, chemical activation was carried out using chemical activators ZnCl2 and NaOH. The purpose of this study is to prepare and investigate the characteristics of chemically activated coffee skin bio-char focusing on the surface properties and iodine adsorption capacity. Prior to carbon activation, a purpose built pilot-scale reactor was fabricated and tested at temperatures of 400 °C and 500 °C. The difference in carbonation temperature and variations in activator concentration alter the absorption properties. The results showed that the coffee-skin pyrolyzed at 500 °C and activated by 2% NaOH solution exhibits the highest absorption value of 720.2 mg/g. Lower absorption values were observed in any ZnCl2 activator samples. SEM-EDS analysis result suggests significant changes in composition of the ACs before and after activation. Most of impurities are gone during activation and washing. The value of C atoms increases and the pores structure of the activated carbon are expanding showing suitable properties for adsorbent.
Adsorption of Mercury Using Different Types of Activated Bentonite: A Study of Sorption, Kinetics, and Isotherm Models
Authors: Naswir Muhammad , Jalius Jalius , Natalia Desfaur , Arita Susila , Wibowo Yudha Gusti
Published: January 2021

Mercury is a hazardous element because of its toxicity and harmful effects on human health. Various traditional and low-cost methods have been developed to remove mercury from wastewater. This study used local raw material as an alternative adsorbent to treat mercury-contaminated wastewater. Activated bentonite was prepared using different chemical activators (H3PO4, HCl, and ZnCl2) in various concentrations. Then, it was dried at 200°C for an hour. The materials were characterized by SEM-EDS. Its percent removal and isotherm models were analyzed. In this study, the most effective activator was H3PO4 and the experimental data matched the Freundlich model.
The Impact of Covid-19 Pandemic on the Global Trade
Authors: Vo Thuy Dung , Tran Manh Dung
Published: January 2021

Human being is currently dealing with a pandemic known as COVID-19, a highly contagious pandemic with unprecedented health crisis worldwide. This crisis has seriously affected communications, jobs, manufactures, commerce, consumption and human life. Affected international transport sector resulted in the disruptions of shipping, along with the new policies toward economy, travel restriction and border shutdowns, led to a dramatic increase in the trade costs. In the first quarter of 2020, this had a significant impact on global trade. This paper is utilizing an analytical methodology that aggregates, collects and categorizes relevant domestic and international reports on the COVID-19 pandemic, government policies, the degree of uncertainty of economic policies and its effect on trade costs. In the present study, we first brightly described the travel restriction measures taken by WTO members, secondly, the impact of the COVID-19 pandemic on trade costs, government pandemic response policies in the early stages of the COVID-19 pandemic were discussed ultimately we analyzed the effect of the significant increased trade costs on the global trade and its relevant roots. In this paper we used an integrated analysis method to collect and classify domestic and international reports on the COVID-19 pandemic through reports of WTO and the member countries.
RESPON POC HERBAFARM DAN KOMPOS TANDAN KOSONG KELAPA SAWIT TERHADAP DUA JENIS MENTIMUN MERCY (Cucumis sativus L.)
Authors: Fathurrahman F , Mulyani Sri , Saputra Jumaidi BZ
Published: January 2021

Peluang pengembangan budidaya sayuran mentimun cukup baik di Indonesia. Untuk meningkatkan produksinya dilakukan  upaya perbaikan dalam teknik penambahan unsur hara. Varietas baru seperti mentimun (Cucumis sativus L.)  hasil mutasi memiliki daya tarik tersendiri misalnya terdapat karakter morfologi yang menarik. Penelitian bertujuan melihat respon  POC herbafarm dan kompos tandan kosong kelapa sawit terhadap dua jenis mentimun mercy (Cucumis sativus L.). Menggunakan rancangan acak lengkap (RAL) secara faktorial terdiri dari dua faktor dan tiga ulangan. Pertama: POC Herbafarm  4 taraf yaitu  tanpa  herbafarm, 5, 10 dan 15 ml/l air. Faktor Kedua: pupuk kompos TKKS 4 taraf yaitu tanpa kompos TKKS,  kompos TKKS 15, 20 dan 25 ton/ha. Hasil pengamatan tinggi tanaman pada mentimun mercy F1 pada perlakuan kombinasi H2T2A1 membuktikan konsentrasi herbafarm dan dosis kompos TKKS yang terbaik pada mentimun mercy F1. Selain itu juga pada pengamatan umur berbunga merupakan perlakuan yang terbaik bersama kombinasi H3T1A1. Jumlah buah tertinggi  diperoleh dari perlakuan H3T3A2 untuk mercy mutan. Perlakuan H3T3A1 dan H2T2A1 membuktikan menghasilkan berat dan panjang buah tertinggi  pada mentimun mercy F1. Hasil pengamatan brix  konsentrasi POC herbafarm dan dosis kompos TKKS tertinggi mempengaruhi untuk kedua jenis mentimun.
DAYA INFEKSI DAN EFEKTIVITAS FUNGI MIKORIZA ARBUSKULAR Gigaspora margarita PADA TANAMAN JAGUNG DENGAN MASA SIMPAN YANG BERBEDA
Authors: Rini Maria Viva , Andriyyani Lita , Arif M. A. Syamsul
Published: January 2021

Fungi mikoriza arbuskular (FMA) merupakan salah satu tipe mikoriza yang sangat luas penyebarannya dan membentuk simbiosis mutualisme dengan akar tanaman. Saat ini, pupuk hayati berbahan dasar spora mikoriza sudah banyak dikembangkan, namun laporan tentang berapa lama pupuk ini dapat disimpan tanpa spora kehilangan daya infeksi dan efektivitasnya sangat sedikit. Oleh karena itu, penelitian ini dilakukan dengan tujuan untuk mengevaluasi pengaruh masa simpan terhadap (1) daya infeksi spora Gigaspora margarita dan (2) pertumbuhan tanaman jagung. Spora G. margarita yang telah disimpan selama 0, 6, dan 22 bulan diinokulasikan ke akar kecambah jagung dan ditanam dalam pot bervolume 450 ml berisi media tanam campuran pasir steril dan zeolite (2:1 berdasarkan volume).  Infeksi akar diamati pada 1, 2, dan 3 minggu setelah inokulasi FMA. Untuk studi efektivitas, kecambah jagung diinokulasi dengan spora G. margarita dan ditanam dalam polibag yang berisi 8 kg media dan dipelihara di rumah kaca selama 8 minggu.  Hasil penelitian menunjukkan bahwa waktu simpan mempengaruhi daya infeksi FMA G. margarita. Spora G. margarita pada semua masa simpan berhasil menginfeksi akar lebih dari 50% 8 minggu setelah inokulasi dan mampu meningkatkan pertumbuhan tanaman jagung.
PENGARUH SISTEM OLAH TANAH DAN PEMBERIAN MULSA TERHADAP KEHILANGAN UNSUR HARA (N,P,K) DAN C-ORGANIK AKIBAT EROSI PADA PERTANAMAN KACANG HIJAU MUSIM TANAM KETIGA
Authors: Putra Rio Anugrah , Banuwa Irwan Sukri , Supriatin Supriatin , Utomo Muhajir
Published: January 2021

Penelitian ini bertujuan untuk mengetahui pengaruh sistem olah tanah, penggunaan mulsa, dan interaksi antar keduanya terhadap kehilangan unsur hara (N, P, K) dan C-organik akibat erosi pada lahan pertanaman kacang hijau.  Penelitian ini dilakukan pada Maret sampai Juni 2017 di Laboratorium Lapang Terpadu Fakultas Pertanian Universitas Lampung.  Rancangan yang digunakan adalah Rancangan Acak Kelompok Lengkap (RAKL) dengan dua faktor perlakuan yaitu sistem olah tanah dan pemberian mulsa, dan empat kali ulangan.  Hasil penelitian menunjukkan bahwa perlakuan sitem olah tanah konservasi, perlakuan mulsa dan interaksi antara keduanya tidak berpengaruh nyata terhadap kandungan N-total, P-tersedia, K-dd dan C-organik dalam sedimen.
PENGARUH JENIS DAN KONSENTRASI ZAT PENGATUR TUMBUH ALAMI PADA PERTUMBUHAN SEEDLING MANGGIS (Garcinia mangostana L.)
Authors: Nabila Tia Nur , Rugayah Rugayah , Karyanto Agus , Widagdo Setyo
Published: January 2021

Bibit manggis (Garcinia mangostana L.) yang berasal dari biji lebih diminati dibandingkan dari sambung pucuk karena memiliki struktur tanaman yang kokoh dan akar primer yang kuat.  Namun demikian, pertumbuhan awal seedling manggis tergolong lambat akibat minimnya akar-akar lateral.  Oleh karena itu perlu diupayakan cara untuk mempercepat pertumbuhan seedling manggis.  Penelitian ini bertujuan untuk mendapatkan teknologi yang efektif untuk mengoptimalkan pertumbuhan seedling manggis dengan penggunaan zat pengatur tumbuh alami ekstrak bawang merah dan ekstrak kecambah dengan berbagai konsentrasi.  Penelitian ini dilaksanakan di Rumah Kaca Fakultas Pertanian, Universitas Lampung dari bulan Oktober 2018 hingga Maret 2019.  Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan faktor tunggal tidak terstruktur dengan perlakuan yaitu, ekstrak bawang merah pada konsentrasi 250, 500, dan 750 g/L dan ekstrak kecambah pada konsentrasi 100, 200, dan 300 g/L.  Data yang diperoleh dianalisis dengan analisis ragam dan dilakukan pemisahan nilai tengah dengan uji orthogonal kontras pada taraf nyata 5%.  Hasil penelitian menunjukkan bahwa pemberian ekstrak kecambah konsentrasi 100 g/L menghasilkan panjang akar primer lebih panjang dan jumlah akar sekunder lebih banyak dibandingkan konsentrasi 200 dan 300 g/L.  Pemberian ekstrak bawang merah konsentrasi 500 g/L secara agronomis lebih meningkatkan pertumbuhan tajuk (diameter batang dan luas daun) dibandingkan konsentrasi 250 dan 750 g/L.
KERAGAMAN DAN HERITABILITAS KARAKTER VEGETATIF CABAI MERAH (Capsicum annum L.) VARIETAS LARIS GENERASI M2 HASIL IRADIASI SINAR GAMMA
Authors: Suwandana Erik , Rugayah Rugayah , Ardian Ardian , Sa'diyah Nyimas
Published: January 2021

Produktivitas cabai nasional yang terus menurun dapat diatasi dengan penggunaan perakitan varietas unggul diawali dengan keragaman salah satu cara meningkatkan keragaman yaitu dengan mutasi buatan dengan cara iradiasi sinar gamma pada benih cabai.  Penelitian ini bertujuan untuk mengetahui (1) besaran keragaman karakter vegetatif tanaman cabai merah varietas Laris generasi M2 hasil iradiasi sinar gamma dan (2) besaran nilai heritabilitas karakter vegetatif tanaman cabai merah varietas Laris generasi M2 hasil iradiasi sinar gamma. Iradiasi sinar gamma dilakukan di Pusat Penelitian dan Pengembangan Teknologi Isotop dan Radiasi, Pasar Jumat, Jakarta pada tanggal 15 Juni 2016, sedangkan penanaman benih M2 dilakukan di Lapangan Terpadu, Fakultas Pertanian, Universitas Lampung pada bulan September 2017 sampai dengan bulan Maret 2018. Penelitian ini menggunakan metode single plant. Hasil penelitian menunjukkan bahwa pengamatan kecepatan perkecambahan dan presentase bibit normal pada generasi M2  lebih baik dibandingkan M0, sedangkan pengamatan presentase perkecambahan dan keserempakan perkecambahan generasi M2 lebih rendah dibandingkan dengan M0. Keragaman fenotipe yang luas terdapat pada karakter tinggi bibit dan tinggi dikotomus tanaman saat berbunga, sedangkan keragaman genotipe semua karakter menunjukkan kriteria yang sempit. Besaran nilai duga heritabilitas yang tinggi ditunjukkan pada karakter jumlah cabang primer dan diameter batang, untuk parameter tinggi bibit, tinggi tanaman saat berbunga, dan panjang cabang primer menunjukkan kriteria yang rendah.
PENGARUH SISTEM OLAH TANAH DAN PEMUPUKAN NITROGEN JANGKA PANJANG TERHADAP PERMEABILITAS TANAH PADA PERTANAMAN JAGUNG (Zea mays L.) DI LAHAN POLITEKNIK NEGERI LAMPUNG
Authors: Putri Kinar Yoshie , Utomo Muhajir , Afrianti Nur Afni , Afandi Afandi
Published: January 2021

Penelitian ini bertujuan untuk mengetahui pengaruh sistem olah tanah dan pengaruh pemupukan nitrogen jangka panjang serta interaksinya terhadap permeabilitas tanah. Penelitian ini merupakan penelitian jangka panjang tahun ke-32 yang dilaksanakan pada bulan November 2018 sampai Februari 2019 di lahan Politeknik Negeri Lampung. Penelitian ini disusun secara faktorial (2x3) dalam rancangan acak kelompok (RAK) dengan 4 ulangan.  Faktor pertama adalah dosis pemupukan Nitrogen dengan 0 kg N ha-1 (N0) dan 200 kg N ha-1 (N2). Faktor kedua adalah sistem olah tanah yaitu Olah Tanah Intensif (OTI), Olah Tanah Minimum (OTM), dan Tanpa Olah Tanah (TOT). Variabel pengamatan meliputi Permeabilitas tanah, C-organik tanah, Berat volume tanah (Bulk Density), Porositas Tanah. Hasil penelitian menunjukkan bahwa kelas permeabilitas tanah tidak dipengaruhi oleh sistem olah tanah dan pemupukan nitrogen dan tidak terjadi interaksi antara kedua perlakuan, kelas Permeabilitas tanah pada semua kombinasi perlakuan masuk ke dalam kelas sedang.
TINGKAT TOLERANSI TANAMAN NANAS (Ananas comosus [L] Merr.) TERHADAP KONSENTRASI Fe PADA MEDIA HIDROPONIK
Authors: Agustian Defry , Ginting Yohannes C , Timotiwu Paul B , Widagdo Setyo
Published: January 2021

Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi Fe terhadap perakaran dan pertumbuhan bibit nanas serta mengetahui tingkat toleransi tanaman nanas terhadap konsentrasi Fe.  Penelitian ini dilaksanakan di Rumah Kaca Fakultas Pertanian Universitas Lampung, Gedong Meneng, Bandar Lampung pada bulan Desember 2018 hingga Maret 2019.  Penelitian ini disusun dengan menggunakan Rancangan Kelompok Teracak Sempurna (RKTS) dengan tiga ulangan sebagai kelompok dan terdapat lima taraf konsentrasi Fe.  Hasil penelitian menunjukkan bahwa: semakin meningkat konsentrasi Fe maka pertumbuhan bibit nanas akan semakin terhambat.  Peningkatan konsentrasi Fe di atas 10 ppm mengakibatkan semakin menurunnya pertumbuhan dari akar tanaman nanas. Tanaman nanas toleran terhadap keracunan Fe pada konsentrasi 5 ppm.
PENGARUH PEMBERIAN PUPUK ORGANIK DAN PUPUK HAYATI TERHADAP RESPIRASI TANAH PADA PERTANAMAN TOMAT CHERRY (Lycopersicum esculentum Mill) DI DESA SUKABANJAR KECAMATAN GEDONG TATAAN
Authors: M Junaidi , Yusnaini Sri , Hendarto Kus , Buchari Henrie
Published: January 2021

Respirasi tanah merupakan pencerminan aktivitas mikroorganisme tanah.  Pengukuran respirasi tanah (mikroorganisme tanah) merupakan cara yang pertama kali digunakan untuk menentukan aktivitas mikroorganisme tanah. Penetapan respirasi tanah berdasarkan jumlah CO2 yang dihasilkan oleh mikroorganisme tanah dan jumlah O2 yang digunakan oleh mikroorganisme tanah.  Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk organik, aplikasi pupuk hayati, dan interaksi antara kedua pupuk tersebut terhadap respirasi tanah pada pertanaman tomat cherry (Lycopersicum esculentum Mill).  Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) yang disusun secara faktorial, faktor pertama jenis pupuk organik (K) dan faktor kedua konsentrasi pupuk hayati (M), setiap perlakuan diulang sebanyak tiga kali sehingga diperoleh 36 petak satuan percobaan.  Data yang diperoleh dianalisis dengan sidik ragam pada taraf 5% yang terlebih dahulu diuji homogenitas ragamnya dengan menggunakan Uji Bartlett dan additivitasnya diuji denga Uji Tukey. Rata-rata nilai tengah dari data diuji dengan Uji BNT pada taraf 5%.  Hubungan antara pH tanah, kadar air tanah, suhu tanah, dan C-organik dengan respirasi tanah diuji dengan uji korelasi.  Hasil penelitian menunjukan bahwa perlakuan pupuk organik dan  pupuk hayati berpengaruh nyata terhadap respirasi tanah, tetapi tidak terjadi interaksi antara pupuk organik dan pupuk hayati baik pada fase vegetatif maupun pada fase pasca panen.  Berdasarkan uji BNT 5% pupuk organik dan pupuk hayati menghasilkan nilai respirasi tanah yang lebih tinggi dibandingkan dengan kontrol.
PENGARUH PENAMBAHAN SURFAKTAN DAN WAKTU TURUN HUJAN SETELAH APLIKASI TERHADAP DAYA KENDALI HERBISIDA GLIFOSAT
Authors: Mustikawati Meylita , Sembodo Dad R. J. , Sanjaya Purba , Pujisiswanto Hidayat
Published: January 2021

Aplikasi herbisida glifosat banyak dipilih untuk mengendalikan gulma karena memiliki spektrum pengendalian yang luas. Hujan merupakan salah satu faktor yang dapat menurunkan efektivitas herbisida glifosat sedangkan penambahan surfaktan dalam aplikasi herbisida glifosat dapat meningkatkan efektivitas herbisida tersebut. Tujuan penelitian untuk mengetahui pengaruh penambahan surfaktan dan waktu turun hujan setelah aplikasi serta interaksinya terhadap daya kendali herbisida glifosat. Penelitian menggunakan rancangan petak terbagi dengan 14 perlakuan dengan 5 ulangan yang diujikan pada gulma Paspalum conjugatum, Setaria plicata, Asystasia gangetica, Praxelis clematidea, Cyperus rotundus, dan Cyperus kyllingia. Petak utama yaitu tanpa penambahan surfaktan dan penambahan surfaktan 0,1% sedang anak petak yaitu waktu turun hujan setelah aplikasi dengan waktu turun hujan 0, 1, 2, 3, 4, dan tanpa hujan setelah aplikasi. Data dianalisis ragam dan diuji lanjut dengan uji Beda Nyata Terkecil (BNT) taraf 5%. Hasil penelitian menunjukkan bahwa penambahan surfaktan dapat meningkatkan daya kendali herbisida glifosat, dan waktu turun hujan setelah aplikasi dapat menurunkan daya kendali herbisida glifosat. Penambahan surfaktan pada aplikasi herbisida glifosat yang diikuti hujan setelah aplikasi memiliki daya kendali yang lebih tinggi dibandingkan dengan aplikasi herbisida tanpa surfaktan.
A Technique For Lock-In Prediction On A Fluid Structure Interaction Of Naca 0012 Foil With High Re
Authors: Arini Nu Rhahida , Turnock Stephen R. , Tan Mingyi
Published: January 2021

A numerical lock-in prediction technique of a NACA 0012 hydrofoil, immersed in a flow having a Re of 3.07x106 is proposed in this paper. The technique observes the foil’s response as part of a fluid-structure interaction analysis. The response is modelled by foil’s vibration which is represented by spring and damper components. The technique identifies and predicts the foil’s lock-in when it vibrates. The prediction is examined using the Phase Averaged Method which employs the Hilbert Transform Method. The aim of this paper is to propose a numerical way to identify a lock-in condition experienced by a NACA 0012 foil in a high Reynolds number flow. The foil’s mechanical properties are selected and its motions are restricted in two modes which are in the pitch and heave directions. The rotational and transverse lock-in modes are identified in the model. The existence of lock-in is verified using pressure distribution plot, the history of trailing edge displacement and fluid regime capture. The history of total force coefficients is also shown to justify the result. The result shows that the technique can predict reliably the lock-in condition on the foil’s interaction. Three main fluid induced vibration frequencies are generated in the interaction. None of them are close to natural frequency of the foil and lock-in is apparently not found in the typical operational condition.
PERKARA MAFQUD DI PENGADILAN AGAMA DI PROVINSI RIAU DALAM PERSPEKTIF KEADILAN GENDER
Authors: Hardani Sofia , Asmiwati Asmiwati , Nofrita Dewi
Published: January 2021

Tulisan ini bertujuan untuk mengungkapkan bagaimana kasus-kasus mafqud yang diajukan ke Pengadilan Agama di Provinsi Riau, bagaimana proses penyelesaian perkaranya, dan bagaimana analisis gender terhadap kedua permasalahan tersebut. Di Pengadilan Agama di provinsi Riau, peristiwa mafqud disebut dengan suami ghaib, yaitu kepergian suami dalam waktu yang lama tanpa diketahui keberdaannya. Kasus-kasus mafqud yang terjadi sangat terkait dengan kondisi personal dan kondisi rumah tangga pasangan. Hal ini meliputi tingkat pendidikan, tradisi, usia perkawinan, pekerjaan, dan hubungan dalam rumah tangga. Proses perkara ghaib lebih lama pada tahap pemanggilan dibanding perkara cerai gugat, akan tetapi proses sidangnya cukup singkat karena tidak adanya pihak tergugat, dan diputus dengan verstek. Dalam perspektif gender, ghaibnya suami adalah salah satu bentuk perbuatan yang zalim dan tidak bertanggung jawab.Akan tetapi hal tersebut tidak terlepas dari kondisi latar belakang personal dengan tingkat pendidikan yang rendah, kurangnya pengetahuan akan hukum-hukum agama, tidak memiliki pekerjaan tetap, dan rendahnya penghasilan.Oleh karenanya, mereka perlu mendapatkan penyadaran akan tanggung jawab berumah tangga, mendapatkan pembinaan mental dan keagamaan serta pekerjaan yang layak. Perempuan yang ditinggal ghaib perlu mendapatkan perlindungam, baik sosial, psikis, maupun ekonomi
AGENSI PEREMPUAN DALAM MANAJEMEN PENDIDIKAN MADRASAH: BELAJAR DARI PONDOK PESANTREN NURUL JADID PROBOLINGGO
Authors: Rifa’i Moh. , Diyah Wardatul Mila
Published: January 2021

Keadilan dan kesetaraan gender hingga saat ini masih terus diperjuangkan untuk menempatkan perempuan pada posisi yang setara dengan laki-laki. Hasilnya telah banyak ditunjukkan dengan banyaknya perempuan menduduki posisi penting sebagai pengambil kebijakan bersama-sama dengan laki-laki. Demikian juga dalam bidang pendidikan. Tulisan ini menjelaskan tentang bagaimana kontribusi perempuan dengan laki-laki dalam memanajemen pendidikan madrasah. Pelaksanaan penelitian ini bertempat di pondok pesantren Nurul Jadid. Penelitian ini menggunakan pendekatan kualitatif merupakan metode yang memiliki prosedur penelitian yang menghasilkan data deskriptif berupa kata-kata tertulis dan lisan dari orang atau bahkan dari perilaku orang yang dapat diamati. Hasil penelitian menunjukkan bahwa kontribusi perempuan dalam pelaksanaan program serta pengawasannya pondok pesantren Nurul Jadid memfungsikan kaum perempuan berperan sebagai perpanjangan tangan dari pengasuh dalam mengelola pesantren, pada posisi wakil ketua, sekretaris dan bendahara. Peran laki-laki masih sebagai “raja” sedangkan perempuan sebagai manajer yang bertanggung jawab dalam mengatur santri
MENGAPA MENGHARGAI IBU ? Analisis Psikologi Indijinus pada Pelajar Sekolah Menengah Atas di Provinsi Riau
Authors: Widyastuti Ami , Munthe Ricca Angreini
Published: January 2021

Tujuan penelitian adalah mencari tahu alasan menghargai ibu dari perspektif anak. Jenis penelitian kualitatif deskriptif dengan menggunakan pendekatan Indigenous Psychology, yang melihat dari sudut pandang budaya lokal setiap fenomena sesuai konteks terkait. Menggunakan metode Survey, data dikumpulkan dengan kuesioner berisi pertanyaan terbuka dan tertutup yang dikembangkan oleh Kim (2006) dan telah disesuaikan dengan Center for Indigeonus Psychology (CIPP) Fakultas Psikologi UIN Sultan Syarif Kasim Riau. Responden penelitian adalah 224 pelajar Sekolah Menengah Atas di Propinsi Riau. Data dianalisis dengan pengkategorisasian berdasarkan persamaan tema, ditabulasi silang dengan jenis kelamin responden. Hasil penelitian menemukan bahwa ada 7 alasan seseorang menghargai sosok ibunya yaitu : (1) orang yang terbaik (31,9%), (2) orang penting/kunci (21,8%0, (3) pecinta (17,9%), (4) penanggung jawab (13,0%), (5) tulang punggung keluarga (8,3%), (6) model perilaku (5,6%), dan (7) pemberi motivasi (1,9%). Temuan ini perlu dijadikan referensi bagi calon ibu agar dihargai anak
EKSISTENSI PERAN PEREMPUAN SEBAGAI KEPALA KELUARAGA (Telaah terhadap Counter Legal Draf-Kompilasi Hukum Islm dan Qira’ah Mubadalah)
Authors: Santoso Lukman Budi
Published: January 2021

Diskriminasi gender terkesan timbul pada aturan yang menyebutkan bahwa suami adalah kepala keluarga dan istri adalah ibu rumah tangga. Artinya, jika dikaitkan dengan fenomena yang terjadi pada saat ini sudah tidak lagi relevan.Tulisan ini bertujuan untuk menganalisis eksistensi peran perempuan sebagai kepala keluarga ditinjau dari perspektif CLD-KHI dan Qira’ah Mubadalah.Jenis penelitian ini adalah penelitian pustaka dengan menggunakan metode kualitatif dan analisis gender, yang menghasilkan data secara deskriptif analitis. Hasil penelitian menunjukan bahwa di dalam CLD-KHI kedudukan, hak, dan kewajiban suami istri adalah setara baik dalam kehidupan rumah tangga maupun kehidupan masyarakat. Suami dan isteri dapat berperan baik sebagai kepala keluarga pencari nafkah atau mengurus rumah tangga dalam wilayah domestik. Dalam perspektif qira’ah mubadalah kebutuhan nafkah keluarga pada prinsipnya adalah tanggung jawab suami dan istri. Masing-masing dapat berbagi peran secara fleksibel, dan saling bekerja sama dalam mengemban tugas dan amanah rumah tangga
RUHANA KUDDUS PELOPOR GERAKAN ENTERPRENEUR PEREMPUAN DI MINANGKABAU
Authors: Hanani Silfia
Published: January 2021

Ruhana Kudus is one of the developer of women’s economic movement in Minangkabau in colonial era. One of the movement is establish an economic organization which can motivate the women to have entrepreneur spirit. The economic organization that established by Ruhana Kuddus is Amai Setia handicraft. In this organization, the women get guidance to make many handicrafts that earn and run the economy, then those handicrafts will be sold in the market. The profit of the handcraft selling will be used as women prosperity strengthening and also as one of the helper in running life at economic section. The  Economic activities that established by Ruhana Kuddus is in handcraft skill, so it mastered by the women, then it becomes one of house hold trading that still exist till now.
Testing of the Influence of the Spray Cooling System on the Air Cooler Efficiency
Authors:   Faculty of Mechanical Enginnering, Belgrade, University, Belgrade, Serbia, Otović Milena , Milovančević Uroš , Genić Srbislav , Mitrović Nenad , Černicin Vladimir , Otović Srđan , Antić Milan
Published: January 2021

On the hitherto installed chillers/rooftopunits/dry coolers and air coolers, a significant improvement in cooling wasnoticed in the summer mode when the pipe bundle is sprayed with water. Tests have been performed on systems that produce water mist (micron-sized water droplets), which are formed by spraying water under high pressure through the nozzles/nozzle openings. When a drop of micron-sized water comes in contact with warm air, it evaporates very quickly, absorbing a certain amount of heat, which results in cooling the air. This improves the operation of the cooler in critical periods when the ambient air temperatureis very high. The aim of the test is to determine the im-provement of the cooler operation under operating conditions with the application of the described system in relation to the operating mode without water spraying (dry operating mode).
Air-to-Water Heat Pump Operation Analysis
Authors:   Faculty of Mechanical Enginnering, Belgrade, University, Belgrade, Serbia, Malić Ljubomir , Paunović Aleksandra , Milovančević Uroš , Otović Milena
Published: January 2021

The aim of this paper is a theoretical analysis of the operation of an air-to-water heat pump located in the Labo-ratory for Thermal Science at the Faculty of Mechanical Engineering in Belgrade. This results provide the basis for further experimental analyzes of this installation.The paper gives a comparative overview of the performance of a scroll and reciprocating compressor when pro-pane (R290) is used as a refrigerant. Also, the analysis of the influence of internal subcooling on the thermodynamic cycle is presented. Finally, according to the developed model of the heat pump performances investigation, the change in the average values of Coefficient of Performance (COP) during the average heating season, forthe period 2014 –2018, is shown.
Characteristics of R718 Thermal Systems and Possibilities for Implementation in Refrigeration / Heat Pump Systems in Buildings
Authors:   Faculty of Mechanical Engineering,Ss. Cyril and Methodius University, Skopje, Republic of Macedonia, Gjerasimovski Aleksandar , Sharevska Maja , Gjerasimovska Natasha , Sharevska Monika , Šarevski Milan
Published: January 2021

Regulations for CFCs and HCFCs refrigerants phase out and HFCs and HFEs reduction and renewed interest in natural refrigerants (water R718, CO2 R744, ammonia R717, air, hydrocarbons etc.) are discussed. Thermodynamic properties of water (R718) are analyzed and benefits of applicationas well as challenges in the implementation of R718 systems are explained. Deep vacuum operating conditions and low specific volumetric cooling capacity of R718 are peculiarities that cause large and extremely large volumetric flow rates for the temperature range of refrigeration / heat pump air –conditioning applications. The required pressure ratio for a given temperature lift is high. The high value of the water isentropic exponent causes high temperature at the compressor discharge. The specifics in the R718 turbo compressors caused by that reasons are analyzed and the range of optimum application of R718 refrigeration / heat pump systems are estimated
The Categories of Utterances Used by Male and Female Teachers
Authors: Dalimunthe Maharani . , Pulungan Anni Holila , . Zainuddin .
Published: January 2021

This study focus on investigating utterances used by male and female teachers in teaching learning process based on inquiry model. It is a qualitative research design. The subjects were six teachers in SMP AL-Wasliyah 29 Medan. There are three male teachers and three female teachers. The data of this research is collected by recording, transcribing and analysing. Recording was applied to record utterances of male and female teachers in teaching learning process based inquiry model. Transcribing was applied to transcribe the utterances of male and female in teaching learning process based on inquiry model. And analysing was to analyse the utterances of male and female in teaching learning process based on inquiry model. The study proposed by Tanen’s theory. The problem of the study are how the categories of male and female teachers’ utterances realized and why realized in the ways they are. The data were analysed by using Miles and Huberman. The result of this study revealed that: Male and female teachers were different in delivering their utterances. It could be seen from the categories showed on their utterances. Male teachers showed the categories of male utterances, such as support, intimacy, understanding, feeling, and proposal in their utterances to their students. While female teachers showed status, advice, and orders.Keywords: Gender Differences, Inquiry Model, Teaching Learning Process, Male and Female
UPAYA GURU MENUMBUHKAN PERILAKU BERTANGGUNG JAWAB SISWA DALAM BELAJAR DI MI MUHAMMADIYAH 12 NGAMPEL PONOROGO JAWA TIMUR
Authors: Marzuqi Muhammad , Muslich Ahmad , Aryanto Ayok
Published: January 2021

This research was conducted to know the factors that cause fifth-grade children to be less responsible in their learning at Madrasah Ibtidaiyah 12 Ngampel and the teacher efforts of the teacher in fostering responsible behavior in classroom children’s learning. This type of research is qualitative research with a case study approach. The subjects of this study were all students of grade V, totaling 14 students, the principal of the class teacher. Religion teacher and MADIN/TPA teacher. Data collection methods used included an interview, observation, and documentation. Meanwhile, the data analysis used included: data reduction, data presentation, and concluding data validation using triangulation and member checking techniques. The results of this study are as follows (1) the factor that causes less responsibility the learning of class children V Madrasah Ibtidaiyah 12 Ngampel, namely the ability of the student is low. The level of student awareness is low in the importance of learning responsibility and the lack of attention of parents toward children’s education. (2) teacher effort in fostering responsible behavior in learning for grade V student in Madrasah Ibtidaiyah 12 Ngampel, that is student introduced to the importance of responsibility in taking responsibility for learning and collaboration between the school and parent in caring for and educating children.
PENGARUH KETERLIBATAN ORANG TUA TERHADAP MOTIVASI BELAJAR SISWA KELAS IV DAN V MI ALAM ISLAMIC CENTER PONOROGO
Authors: Rofi’i Andik Muhammad , Susanto Happy , Aryanto Ayok
Published: January 2021

This study aims to determine the influence of parental involvement on the learning motivation of grade IV and V students at MI Alam Islamic Center Ponorogo. In this study, the total population was 42 students in class IV and V of MI Alam Islamic Center Ponorogo which included 11 children in class IV A, 12 children in class IV B, and 19 in class V. Because the number of class IV and V MI Alam Islamic Center Ponorogo is 42 students, the population sample in this study is all of them. In measuring the research variables, the researcher first tested the instrument, namely the validity test and the reliability test. Meanwhile, in measuring the effect of the two variables using the correlation formula and simple linear regression using SPSS 20 to determine the results of the data that has been done. Based on the data processing that has been done, there is a significant influence between the involvement of parents on student motivation at MI Alam Islamic Center Ponorogo amounting to 32.7% while the remaining 67.3% is influenced by other aspects