bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH NPL, LDR DAN BOPO TERHADAP ROA PADA PT BANK PEMBANGUNAN DAERAH SUMATERA UTARA 2014 - 2018
Authors: Kumar Arun , Karin Marshella , Gunawan Felix
Published: July 2020

Perbankan ialah suatu lembaga keuangan yang bersifat intermediary financial. Menghimpun harta dari orang umum yang berbentuk tabungan dan uang yang dikumpulkan disalurkan dalam bentuk pinjaman. Laporan keuangan didapat saat kunjungan langsung yang dilakukan oleh tim peneliti dipakai dalam pengujian ini. Tim peneliti menggunakan metode kuantitatif. Sample pengujian ini Return On Asset pada PT Bank Sumut 2014-2018. Dari penelitian yang dilakukan dapat diketahui bahwa NPL berdampak positif dan signifikan terhadap ROA. LDR tidak berdampak dan tidaklah signifikan terhadap ROA. BOPO berdampak negatif dan serta terhadap ROA. Dari uji serempak, dapat dikatakan bahwa NPL, LDR dan BOPO serentak berdampak signifikan dan positif terhadap ROA.
PERLINDUNGAN HUKUM TERHADAP PEMILIK TANAH SERTIFIKAT HAK MILIK ATAS GUGATAN ORANG LAIN
Authors: Hadiyanto Ide Prima , Anggraini Fika
Published: July 2020

Dalam masyarakat, perolehan hak atas tanah lebih sering dilakukan dengan peralihan hak, yaitu dengan melalui jual beli. Syarat-syarat materiil jual beli sangat menentukan akan sahnya jual beli tanah tersebut. Jika salah satu syarat materiil ini tidak dapat dipenuhi, atau dikatakan penjual bukan merupakan orang yang berhak atas tanah yang  dijualnya atau pembeli tidak memenuhi syarat menjadi pemilik hak atas tanah menurut Undang-undang atau tanah yang diperjualbelikan sedang dalam sengketa atau merupakan tanah yang tidak boleh diperjualbelikan, maka jual beli tanah tersebut adalah tidak sah. Sertifikat merupakan surat tanda hak yang kuat akan tetapi sertifikat bukan satu-satunya surat tanda bukti pemegang hak atas tanah namun masih ada bukti lain tentang kepemilikan yang mampu membuktikan ketidakabsahan sertifikat tanah tersebut. Dalam hal sertifkat hak atas tanah yang diterbitkan oleh Kantor Pertanahan Kabupaten/Kota telah berusia 5 (lima) tahun tidak berarti hak menggugatnya hilang bagi orang yang merasa dirugikan atas diterbitkannya sertifikat hak atas tanah tersebut. Semua tanah yang termasuk tanah yang telah dilekatkan hak dapat dimohonkan pembatalan apabila terdapat putusan Pengadilan yang telah berkekuatan hukum tetap maupun adanya cacat hukum administrasi.
PENILAI AGUNAN HAK CIPTA DALAM PERBANKAN DI INDONESIA
Authors: Ibrahim Muhammad Yusuf
Published: July 2020

Hak Cipta sebagai suatu benda bergerak tidak berwujud dapat menjadi agunan pada perbankan dalam jaminan fidusia. Pengaturan Hak Cipta dapat dijadikan jaminan fidusia terdapat pada ketentuan pada pasal 16 ayat (3) Undang-Undang Nomor 28 Tahun 2014 tentang Hak Cipta (UUHC). Pasal tersebut memunculkan penafsiran, karena tidak ada pengaturan lebih lanjut menyangkut teknis penilaian agunan di dalam UUHC maupun didalam Undang-Undang Nomor 42 Tahun 1999 Tentang Jaminan Fidusia (UUJF). Pasal 40 ayat (1) UUHC jika dikaitkan terhadap Pasal 16 ayat (3) UUHC menyangkut penilaian agunan memunculkan Penafsiran bahwa tidak semua ciptaan yang dilindungi oleh Hak Cipta dapat dijadikan objek jaminan fidusia. Terjadi kekosongan peraturan pelaksana menyangkut penilaian agunan, maka dalam pelaksanaannya perbankan tidak menerima hak cipta sebagai objek jaminan fidusia. Pasal 16 ayat (3) UUHC tidak dapat diterapkan dikarenakan tidak adanya penilai agunan hak cipta dalam perbankan di Indonesia. Penelitian ini menggunakan penelitian hukum. Preskripsi dari penelitian ini, bahwa harus dibentuk lembaga yang berfungsi sebagai penilai agunan Hak Cipta, sehingga ketentuan bahwa Hak Cipta dapat dijadikan sebagai objek jaminan fidusia dapat terwujud secara nyata.
PEMBINAAN ADMINISTRASI DESA DI DESA WAJAJAYA
Authors: Asmanang La Ode , Herman Herman , Tawakal Faris , Indra Indra , Puadji Fahrul , Setianingsi Eka , Sa’ban L.M Azhar , Hastuti Hastuti
Published: July 2020

Desa Wajajayaya merupakan salah satu desa yang belum melakukan penataan administrasi pemerintahan desa sebagaimana yang diatur dalam Permendagri Nomor 47 Tahun 2016 Tentang Pedoman Administrasi Pemerintahan Desa.  Untuk menciptakan keteraturan penyelenggaraan pemerintahan, desa harus memiliki Buku Administrasi Umum, Buku Administrasi Kependudukan, Buku Administrasi Keuangan, Buku Administrasi Pembangunan, dan Administrasi Lainnya sesuai kebutuhan desa. Kegiatan Pengabdian Kepada Masyarakat ini bertujuan untuk memberikan pendampingan dan pembinaan kepada aparat pemerintahan desa Wajajaya Kecamatan Lasalimu Selatan Kabupaten Buton Selatan. Hasil Pengabdian ini, aparatur pemerintah desa Wajajaya dapat memahami dan mengetahui tentang tata kelola administrasi pemerintahan desa yang baik dan benar sesuai dengan Permendagri No 47 tahun 2016, administrasi pemerintahan desa di desa Wajajaya yang selama ini tidak lengkap, tidak tertata dan teratur, berubah menjadi lebih baik dengan terciptanya buku-buku administrasi pemerintahan desa, yang secara terus menerus diisi oleh staf kantor desa untuk mengahasilkan data dan informasi desa yang up-todate dan akurat.
PELATIHAN MAHASISWA DI UNIT PELAYANAN BIMBINGAN DAN KONSELING UNINDRA: PEMAHAMAN SELF CONCEPT REMAJA MELALUI DOODLE ART
Authors: Folastri Sisca , Solihatun Solihatun
Published: July 2020

Konsep diri merupakan sifat unik yang pada manusia, sehingga dapat digunakan untuk membedakan manusia dari makhluk hidup lainnya. Sesuai dengan kondisi yang ditemui oleh tim, masih ditemui individu yang tidak mampu mengendalikan dirinya karena kekurangpahaman individu tersebut terhadap dirinya (self concept), tidak mengetahui kemampuan yang dimiliki. Oleh karena itu, kegiatan pengabdian dilakukan untuk memahami bagaimana konsep diri melalui Doodle Art. Kegatan pengabdian masyarakat ini dilakukan selama dua hari pada mahasiswa asisten UPBK Unindra. Pelaksanaan kegiatan dilakukan dengan metode ceramah, tanya jawab, diskusi dan praktik pemahaman konsep diri melalui Doodle Art. Hasil evaluasi kegiatan yang sudah dilakukan terungkap bahwa kegiatan Doodle Art berhasil dan memberikan kebermanfaatan kepada individu dalam mengarahkan konsep diri yang positif. Hal ini terihat dari antusias dan keikutsertaan peserta selama kegiatan Doodle Art.
EDUKASI PENCEGAHAN PENYAKIT MENULAR DAN PEMANTAUAN TUMBUH KEMBANG ANAK DI TEMPAT PENITIPAN ANAK PADA STAF GRIYA ANAK SURABAYA
Authors: Rambung Etha , Silitonga Hanna T. Hasianna , Rahadiyanti Melania , Wardhani Dyah Kusuma , Messakh Gusto B. Yakobus , Nggebu Irene Sisilia Filipin
Published: July 2020

Griya anak adalah tempat penitipan anak dan sekaligus pendidikan anak usia dini di Kecamatan Rungkut, Surabaya. Griya anak memiliki visi menjadi partner orang tua yang terpercaya dalam mendidik anak-anak sehingga berkembang dan bertumbuh sesuai tingkat perkembangannya baik secara fisik, mental, psikologis dan spiritual. Permasalahan yang ditemukan pada Griya Anak  adalah terbatasnya pengetahuan staf tentang penyakit menular anak, tumbuh kembang anak dan belum ada ruang peralihan dari luar ke dalam ruang Griya Anak untuk meminimalisir terjadinya infeksi dari luar. Kegiatan ini bertujuan memberikan solusi atas permasalahan yang dihadapi Griya Anak dengan memberikan edukasi cara pencegahan penyakit menular pada anak, cara memantau tumbuh kembang anak, dan membuat ruang peralihan untuk pencegahan infeksi dari luar. Metode pelaksanaan yang dilakukan adalah penyuluhan, diskusi, pendampingan, membuat desain dan membuat ruangan pencegahan infeksi. Hasil kegiatan menunjukkan peningkatan pengetahuan staf untuk deteksi dini penyakit menular dan gangguan tumbuh kembang anak serta pencegahannya dan tersedianya ruang pencegahan infeksi di Griya Anak.
EDUKASI LITERASI KEUANGAN BAGI MAHASISWA DI KOTA PALEMBANG
Authors: Setiawan Budi
Published: July 2020

Literasi keuangan memiliki kontribusi penting tidak hanya bagi pelaku bisnis tapi juga untuk semua kalangan masyarakat. Masyarakat dengan tingkat literasi keuangan yang tinggi akan menerka dampak minimal saat terjadi krisis keuangan. Selain itu, tingkat literasi keuangan yang tinggi memberikan informasi penting agar dapat menjangkau berbagai sumber pendanaan dan juga informasi seputar instrumen keuangan di Indonesia. Instrumen investasi di sektor keuangan ini menjadi penting karena dapat memberikan manfaat bagi banyak pihak, baik pemerintah maupun masyarakat. Investasi yang meningkat mampu mendorong ekspansi usaha dan menciptakan lapangan kerja, serta pendorong pertumbuhan ekonomi. Bagi masyarakat, pemahaman tentang investasi memberikan ruang alternatif agar uang mereka bisa bertumbuh setiap waktu. Mahasiswa merupakan generasi muda yang akan menjadi aset masa depan bangsa dan perlu memiliki pengetahuan seputar literasi keuangan agar mereka bisa mengambil keputusan keuangan dengan tepat.
PELATIHAN MELALUI WEB SEMINAR TERKAIT PENULISAN ARTIKEL BERBASIS BIBLIOGRAPHICAL RESEARCH METHOD DALAM BIDANG AKUNTANSI UNTUK PUBLIKASI PADA JURNAL INTERNASIONAL BEREPUTASI
Authors: Firmansyah Amrie , Arham Amardianto , Qadri Resi Ariyasa
Published: July 2020

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberikan pelatihan bagi dosen, mahasiswa, dan para peneliti mengenai penulisan artikel jurnal dengan basis bibliographical research method sebagai salah satu alternatif untuk mempublikasikan artikel penelitian dalam kondisi pandemi Covid-19. Adanya kewajiban bagi dosen dan mahasiswa untuk melakukan publikasi artikel penelitian memerlukan suatu metode penelitian alternatif yang memungkinkan untuk digunakan dalam kondisi work from home. Pelatihan ini dilaksanakan melalui web seminar karena adanya kondisi pandemi Covid-19 yang tidak memungkinkan untuk memberikan pelatihan secara konvensional. Penyelenggara kegiatan ini adalah Universitas Pamulang di Tangerang Selatan, Banten. Kegiatan ini diikuti oleh dosen dan mahasiswa yang tidak hanya berasal dari Pulau Jawa tetapi juga dari luar Pulau Jawa. Metode pelaksanaan kegiatan pengabdian kepada masyarakat ini terdiri atas beberapa tahap. Tahap pertama adalah tahap perencanaan melalui diskusi dengan perwakilan kampus penyelenggara, penyusunan materi, serta diskusi internal tim seputar materi. Tahap kedua adalah pemaparan materi dan diskusi melalui web seminar yang dilakukan dengan aplikasi Google Meet. Tahap ketiga adalah diskusi lebih lanjut secara online dengan peserta-peserta yang membutuhkan penjelasan tambahan mengenai materi yang telah disampaikan.  Berdasarkan hasil diskusi dan feedback yang diperoleh dari para peserta, beberapa peserta kegiatan termotivasi untuk melakukan penelitian dengan menggunakan bibliographical research method khususnya dosen yang memiliki kewajiban untuk mempublikasikan hasil penelitian pada jurnal ilmiah.
Alcohol Cues and their Effects on Sexually Aggressive Thoughts
Authors: Leboeuf Julie , Linden-Andersen Stine , Carriere Jonathan
Published: July 2020

Alcohol and its effects on aggression have been the subject of many discussions and research papers. Despite this fact, there is still a debate surrounding what it is exactly about alcohol that causes aggression. The current study sought to replicate the past finding by Bartholow and Heinz (2006), that alcohol cues without consumption increase the accessibility of aggressive thoughts, which can then influence aggressive behaviors. In the present study, participants had to complete a lexical decision task that was set up to assess whether aggressive words were detected faster in the presence of alcohol-related pictures compared to neutral pictures. The results of this study did not replicate the expected finding as only a main effect of word type was found in which participants detected neutral words faster than aggressive words. Furthermore, the study aimed to assess the role of gender stereotype acceptance levels in this association, but due to faulty design considerations, such analyses were not possible. The results are discussed in terms of the limitations of the study, and propositions for future directions are addressed.
A new Systemic Taxonomy of Cyber Criminal activity
Authors: Babič Matej , Purković Damir
Published: July 2020

Cybercrime commonly refers to a broad range of different criminal activities that involve computers and information systems, either as primary tools or as primary targets. Cybercrime Science combines the methodology of Crime Science with the technology of Information Security. The few existing taxonomies of Cybercrime provide only general insights into the benefits of information structures; they are neither complete nor elaborated in a systemic manner to provide a proper framework guided by real system-principles. The main problem with such taxonomies is the inability to dynamically upgrade, which is why there is no timely cybersecurity actions. The current and past approaches were based mainly on the technical nature of cyberattacks and such approaches classified the impact of the activities from a criminological perspective. In this article, we present a systemic taxonomy of Cybercrime, based on definitions of the field items and the related data specifications. We develop a new method for estimating the fractal dimension of networks to explore a new taxonomy of Cybercrime activity. This method can serve to dynamically upgrade taxonomy and thus accelerate the prevention of cybercrime.
Experimental study on silver nanoparticles: synthesis, photo-degradation and analysis
Authors: Shah Tariq , Saeed Khalid
Published: July 2020

The aim of present study was waste water treatment via advanced oxidation process (AOP). Wet chemical precipitation method was used to prepare silver nanoparticles (Ag NPs). The Ag NPs were employed for photo catalytic degradation of Congo red (CR) dye in aqueous medium. The scanning electron microscopy (SEM) investigation shows agglomerated form of Ag NPs. The average sizes of agglomerations are below 600 nm. Energy dispersive X-rays spectroscopy (EDX) and ultraviolet light visible spectroscopy (UV/Vis) also established the formation of Ag NPs. The photo-degradation study reveals that Ag NPs degraded by 73% of CR dye in 480 min. Catalytic dosage study shows the dye degradation was increased vice versa as increased the amount of Ag NPs and then almost level off after 0.025 g of catalyst. In pH study it was observed that degradation of CR dye increased as pH increased. The recovered catalyst study also significantly degraded the CR dye.
Ukrainian translation and adaptation of Kharshak numerals test
Authors: Zabolotny Dmitry , Lutsenko Viktor , Belyakova Irina , Svitlychna Evgenyja , Berestova Alla , Kholodenko Tetiana , Hradiuk Nataliya
Published: July 2020

The article substantiales the rationale for the Ukrainian translation of Kharshak numerals test. The authors noted the conditions they adhered to maintain phonetic balance. The description of the adaptation process of Kharshak numerals test and the final version of the translation into Ukrainian are given. The authors describe area for future research for the most effective test implementation in practice.
Design assessment of ship strength safety in case of collision
Authors: Гайкович А.И. , Родионов А.А. , Хтве В.Ян.В.
Published: July 2020

В статье описывается подход к оценке прочности судна при столкновении на начальных стадиях проектирования. Показывается, что требования Российского Морского Регистра Судоходства (РМРС) по непотопляемости определяют такую величину расчетной пробоины, при которой часть продольных связей судна будет неминуемо разрушена. Возникает опасность потери общей прочности судна при продольном изгибе, поэтому уже в начальных стадиях проектирования необходима оценка прочности тараненного судна. Таким способом оценки может стать расчет продольной прочности судна с использованием приведенных толщин продольных связей корпуса. Проведено статистическое исследование приведенных толщин основных продольных связей корпуса в функции толщины обшивки днища. Показана возможность оценки момента сопротивления с использованием предложенных зависимостей на примере сухогрузного судна проекта 1590. Для оценки прочности тараненного судна с произвольным типом конструктивного мидель-шпангоута создан пакет программ в оболочке Delphi. С его помощью рассчитывали напряжения в продольных связях корпуса в зависимости от глубины пробоины. Приведен график, показывающий результат такого исследования. Предложена оценка уровня безопасности судна при столкновении.

The article describes the approach to assessing the strength of a vessel in a collision at the initial stages of design. It is shown that the requirements of the Russian Maritime Register of Shipping (RMRS) on the unsinkability of the op-distribution of such a value of the design hole, at which part of the vessel 's longitudinal connections will be inevitably broken once and for all. There was a risk of losing the overall strength of the vessel at longitudinal bending, so an assessment of the strength of the defective vessel was needed in the initial design. This method of evaluation may be to calculate the longitudinal strength of the vessel using the reduced longitudinal bond thicknesses of the hull. Static analysis of the reduced thickness of the main longitudinal ties of the housing as a function of the thickness of the bottom skin was carried out. The possibility of estimating the resistance moment using the proposed dependencies is shown in the example of a dry cargo vessel of project 1590. A Delphi shell software package has been created to assess the strength of a carriage vessel with an arbitrary type of const-hose midframe. It calculated the stresses in the longitudinal ties of the housing depending on the depth of the hole. A graph showing the result of such a study is given. Proposed is assessment of ship safety level in case of collision.
A Conceptual Framework for Entrepreneur Competence and Entrepreneur Performance: The Role of Gender
Authors: Iskamto Dedi , Ghazali Puspa Liza , Afthanorhan Asyraf
Published: July 2020

This study examines the impacts on Entrepreneur Performance (EP) of Entrepreneur Competence (EC) aspects. The EC dimension identified are oppoturnities competencies, organizing competencies, strategic competencies, relationships competencies, commitmet competencies and conceptual competencies. This essay attempts to describe how the EC and measurements affect the success of entrepreneurs with gender as moderator. The EC-SMEs Performance relation has proven as indicated by using the Structural Equation Model (SEM). Therefore, the inference may be made dependent on the concept of the suggested work and literature review. That entrepreneurial success would especially promote entrepreneurial development in Indonesia, so that unemployment is projected to be reduced and competitiveness improved. An additional gain of efficiency and productivity development.
An Asymmetric Effect of Economic Growth, Foreign Direct Investment and Financial Development on the Quality of Environment in Nigeria
Authors: Hassan Jakada Aminu , Mahmood Suraya
Published: July 2020

The study looks at the asymmetric impact of macroeconomic variables on quality of environment in Nigeria. The analysis incorporates data from the annual time series covering the 1970-2018 periods and applies the non-linear ARDL method for the empirical analysis. The findings show that negative and positive GDP escalates the quantity of carbon emissions, thereby worsening environmental sustainability. Through positive as well as negative shocks, FD leads to carbon emissions and FDI increases carbon emissions through positive shocks and decreases them by negative shocks. The positive shock from the FDI increases the CO2 emissions in Nigeria, resulting in environmental degradation. The research suggests implementing technology to promote the productive use of resources that would help boost environmental efficiency, increase long-run productivity and save energy. The lenders will ease financing for the energy sector and devote financial resources to ecologically friendly companies, rather than investing them in financing customers. FDI inflows should be tracked to curb CO2 emissions.
Surface Processing of Polyethylene Terephthalate for Orientation of Nematics in Display Devices
Authors: Barzic Andreea Irina , Albu Raluca Marinica , Nechifor Cristina Delia , Postolache Mihai , Logigan Cristian , Dorohoi Dana Ortansa
Published: July 2020

Thermoplastic polymers have found widespread applicability in electronic industry owing to their facile processing and relatively low costs. Transparent polymer foils, like polyethylene terephthalate (PET), can be utilized in manufacturing components for liquid crystal display (LCD) devices. This work is focused on surface processing of PET through different procedures. The induced surface modifications of polymer samples were analyzed by optical microscopy. Contact angles of nematic drops on PET film are measured to evaluate how the method of surface modification reveals that the surface texturing affects the interactions of polymer with the liquid crystal. The influence of created surface anisotropy on the work of adhesion at polymer/liquid crystal interface is analyzed. Preliminary assessment of nematic orientation on the surface of modified PET foils is performed using polarized light. The results were discussed in regard with the used methodology to adapt the surface of the PET films to achieve optimal orientation of nematic molecules. The obtained data will open new perspectives on processing polymer foils as alignment layers used in LCD devices.
Subcoronary Technique for Orthotopic Implantation of Aortic Scaffold Reinforced with Polytetrafluoroethylene Strips in Sheep: A pilot Study
Authors: Hussein Hussam Al , Hussein Hamida Al , Harpa Marius , Sircuta Carmen , Cotoi Ovidiu S. , Man Adrian , Deac Radu , Suciu Horatiu , Brinzaniuc Klara , Simionescu Dan
Published: July 2020

Over the time, numerous studies have been reported describing successful pulmonary valve replacement, either with xenografts or allografts, performed in sheep model. In contrast, comparable results have not been achieved yet for aortic valve replacement in orthotopic position, which involves a more difficult surgical technique, high hemodynamic demands for the implanted valve and poor survival of animals undergoing this kind of surgery. To our knowledge, in Romania, these were the first orthotopic allogeneic aortic root implantations using the subcoronary technique, carried out by our team. We established feasible perioperative, anesthetic and surgical protocols, which will be used in future studies to evaluate the in vivo functional performances of decellularized valves compared with autologous adipose derived stem cells seeded valves. Therefore, a unique research core was created, which is currently the only center of this kind in our country, by joining a multidisciplinary team consisting of biomedical engineers, cardiovascular surgeons, anesthesiologists, cardiologists, pathologists, microbiologists and veterinarians, who will continue the research activity in the field of tissue engineering and translate experimental results into clinical activity.
Experimental and Numerical Study on the Behavior of Dyneema� HB26 Composite in Compression
Authors: Bucur Florina , Rotariu Adrian , Matache Liviu , Baciu Florin , Jiga Gabriel , Trana Eugen
Published: July 2020

In the last decades as the need for high economical and technical efficiency items/applications became acute, lightweight, high strength and low-cost materials development and investigation emerged as a logical and promising course of action. With high potential for both military and civil sector, the ultra-high molecular weight polyethylene (UHMWPE) is considered a new class of material. Among this class, the Dyneema� HB26 composite is of most interest for the present study. The present paper focuses on the static and dynamic investigation of the HB26 mechanical behavior experiencing an out of plane compressive load. For experimental purposes, using a 15 mm thickness panel two types of samples (cylindrical and cubic samples) were processed. For compression test Instron Testing Machine and the Split Hopkinson Pressure Bar (SHPB) were used. The experimental tests were then compared against the numerical findings highlighting a good consistency.
The Influence of the Preparation Method on the Characteristics of a New Cosmetic Gel Based on Hyaluronic Acid and Matrix-Forming Polymers
Authors: Birsan Magdalena , Bibire Nela , Panainte Alina Diana , Silasi Oana , Antonoaea Paula , Ciurba Adriana , Cristofor Ana Caterina , Wroblewska Magdalena , Sosnowska Katarzyna
Published: July 2020

Because hyaluronic acid (HA) cosmetic gels are the most commonly used gels in the cosmetic industry, the purpose of this study was to develop a new gel formulation of HA in carboxymethyl cellulose sodium (Carmellose, CMC Na), prepared in three different ways and to characterize the gel obtained in terms of texture, pH, thixotropy and decide which preparation method is optimal for obtaining a cosmetic gel. The gel formulations were prepared by dispersing CMC Na in water and glycerol and mixing it in three different ways with HA (at the same time, after gelling and 24 h after gel preparation). The pH, rheological properties and texture of hydrogels were evaluated. The study demonstrated that the formulation prepared with CMC Na has higher viscosity and stability at a pH = 6-9. The viscosity depends on the preparation method of hydrogels, the highest values of the mechanical parameters were recorded in the formulation in which CMC Na and HA were added at the same time. The present study showed that the difference on the texture was realised by the used preparation method. In conclusion the preparation method of a hydrogel with CMC Na 4% and 1% HA has a significant influence on the texture profile and the viscosity characteristics.
Custom Hip Stem Additive Prototyping Using Smart Materials
Authors: Braileanu Patricia Isabela , Simion Ionel , Bou-Said Benyebka , Prisecaru Delia Alexandra , Crisan Nicoleta
Published: July 2020

Although a standardized hip joint prosthesis is a quick and easy solution to repair most diseases related to the hip joint, it never satisfies the patient s personal needs due to the uniqueness of the human anatomy. Femoral hip stem geometry is one of the factors that have an important impact on prosthesis lifespan or the revision surgery frequency that occurs due to postoperative complications, such as impingement or dislocation after THR (Total Hip Replacement). In this sense, the development of a custom hip stem prosthesis starting from a standardized femoral stem can bring benefits to the patient in time, being able to reduce the failure percentage of THR. The purpose of this article is the development of a custom prosthesis based on patient s CT (Computer Tomographic) scans in order to be 3D printed with biocompatible materials, being able to serve as a study model in both engineering and medicine. Also this study represents a first step in understanding how to apply the unique distribution of mechanical properties in human bone, in order to manufacture a hip prothesis that can mimic them.
An Experimental Investigation of Thermal Properties of Fabric Reinforced Epoxy Composites
Authors: Birsan Iulian Gabriel , Bria Vasile , Bunea Marina , Circiumaru Adrian
Published: July 2020

Specific heat and thermal linear expansion coefficient of epoxy composites reinforced with carbon, aramid, glass and hybrid fabrics with unfilled and filled stratified matrices were studied. The thermal measurements of specific heat were performed with Differential Scanning Calorimeter (DSC instrument) and those of thermal coefficient of linear expansion were realized with Thermomechanical Analyzer (TMA instrument). It was analyzed the influence of fiber orientation at various angles (�15�, �30� and �45�) and the effects of two types of filler mixtures added into polymeric matrix on the thermal behavior of composite materials. It was found that in case of epoxy matrix the added filler mixtures reduced its thermal coefficient of linear expansion and had an insignificant influence on specific heat. In case of epoxy composites reinforced with fabrics, the fiber orientation and fillers addition showed different effects on the investigated thermal parameters in dependence of the used reinforcement types.
Laser Marking of PLA FDM Printed Products
Authors: Savu Ionel Danut , Savu Sorin Vasile , Sirbu Nicusor-Alin , Ciornei Mirela , Marin Robert Cristian , Tudose Daniela Ioana
Published: July 2020

The paper aimed to reveal, qualitatively and quantitatively, the modifications suffered by the PLA during the complex heating cycle specific to the 3D printing followed by laser marking. The obtained results showed that the melting point of the PLA decreases from 162.2oC (which is specific to PLA filament) to 153.1oC after the 3D printing process and to 149.7oC after the laser heating. The glass transition suffered the same lowering after the printing process but an important increasing after the laser heating. The elastic modulus evolution proved a decreasing of the plasticity and that is hapenning when the material suffers an increasing of its rigidity. The elongation viscosity was analyzed and its values were decreasing with the increasing of the temperature that happened on the material. The decreasing was produced by the reduction of the elasticity, when the chain branches are decreasing their length. The decreasing is more pronounced with the increasing of the temperature. The ratio between the loss modulus to the storage modulus and quantifies the way in which the PLA absorbs and disperses energy moves its peak from 65oC (curve specific to the PLA filament) to 45oC (curve specific to the last layer deposited by 3D printing process and re-heated by laser beam for marking). The peak means the lowest storage modulus, which is a measure of elastic response of a material, so the transition from glass to high elasticity moves to the lower temperatures.
Composite Resins - Multifunctional Restorative Material and Practical Approaches in Dental Field
Authors: Murariu Alice , Dinu Ciprian , Forna Doriana Agop , Stefanescu Victorita , Topor Gabi , Forna Norina Consuela , Fotea Silvia , Gurau Gabriela , Iordache Cristina
Published: July 2020

With a wide range of composite resins available today, clinicians can benefit from knowledge of the infrastructure of a particular material in order to determine which type will work best in a specific clinical situation. The purpose of this study is to analyze the biomechanical behavior of four types of composite resins, two of them used in direct restorations and the other two for prosthetic restorations created in the lab.The deformations, hardness and elasticity were analyzed under the same conditions, namely at 200 Mpa, as these are very important parameters for the biomechanical behavior of the analyzed biomaterials, the specificity elements being correlated with the biomaterial structure, polymerization time and polymerization modality. As a synthesis of the biomechanical behavior outcome related to the used resins versus the resins used in the lab of dental technique using indirect means, a relatively wide range of higher value parameters stands out with regard to resistance for the lab composites compared to those used in direct restorations.
Traceability of Volatile Organic Compounds from Hypericum perforatum in Fresh and Dried Form and in Essential Oil
Authors: Balea Ana , Pojar-Fenesan Maria , Ciotlaus Irina
Published: July 2020

Microextraction in solid phase from headspace and GC-MS analysis was the method of studying the flowers of Hypericum perforatum in fresh and dry form.The essential oil obtained by hydrodistillation was also analyzed by GC-MS. Identification of the substances was made by comparison of mass spectra with NIST library and standard alkanes were used for the calculation of the linear retention index. The identified compounds were grouped into classes of substances: monoterpene hydrocarbons, sesquiterpene hydrocarbons, oxygenated monoterpenes, oxygenated sesquiterpenes, non-terpene hydrocarbons. The main common constituents were as follows: caryophyllene, β-ocimene, α-pinene, β-pinene, octane-2-methyl. The abundance of the majority compounds, common to the three forms of the plant: essential oil,fresh, and dried plants, was compared.
Comparison of an Artificial Neural Network and a Multiple Linear Regression in Predicting the Heat of Combustion of Diesel Fuel Based on Hydrocarbon Groups
Authors: Younis Younis M. , Abbas Salman H. , Najim Farqad T. , Kamar Firas Hashim , Nechifor Gheorghe
Published: July 2020

A comparison between artificial neural network (ANN) and multiple linear regression (MLR) models was employed to predict the heat of combustion, and the gross and net heat values, of a diesel fuel engine, based on the chemical composition of the diesel fuel. One hundred and fifty samples of Iraqi diesel provided data from chromatographic analysis. Eight parameters were applied as inputs in order to predict the gross and net heat combustion of the diesel fuel. A trial-and-error method was used to determine the shape of the individual ANN. The results showed that the prediction accuracy of the ANN model was greater than that of the MLR model in predicting the gross heat value. The best neural network for predicting the gross heating value was a back-propagation network (8-8-1), using the Levenberg�Marquardt algorithm for the second step of network training. R = 0.98502 for the test data. In the same way, the best neural network for predicting the net heating value was a back-propagation network (8-5-1), using the Levenberg�Marquardt algorithm for the second step of network training. R = 0.95112 for the test data.
Effect of Zn Content on Orthopedic Mg aAlloy as Smart Implant
Authors: Khalifa Omyma Ramadan Mohammed , Ali Abdel-Wahab Abd Elhamid , Kassab Aisha , Tilp Amal Hemida , Esmail Marwa Mohamed Mohamed Mohamed
Published: July 2020

In recent years, smart implants take the most attention in the field of bone manufacturing. Our study seeks to develop the biodegradability of Mg alloys to use orthopedic implants for the biomedical applications to avoid post removal of the implant. Mg and Zn are very important to human body and have no toxicity. Mg - 6% wt Zn biodegradability is studied in simulated body fluid for two and four weeks. Four electro-deposition bathes are used to deposit a coat on the substrate to improve the corrosion resistance of this alloy in the media of simulated body fluid. The following analyses were studied to emphasize the research aim. Scanning electron microscope (SEM), Energy dispersive X-Ray (EDX) analysis shows the surface morphology and the elements of the coat phases components. The results also confirmed by X-Ray diffraction Pattern (XRD) that show the phases that confirmed the formation of hydroxyapatite HA phase, Fourier-Transform Infrared Spectroscopy (FTIR) to investigate the functional groups of the phases coats that confirm the formation of hydroxyapatite and the electrochemical measurements that investigate the improvement of corrosion resistance. The results indicated that the fourth bath gives the best coat and four weeks immersion gives more corrosion resistance than two weeks.
Expression of Antioxidant Enzymes and Changes in Some Physiological Parameters Following the Short-term Heavy Metal Application in Wheat
Authors: Yildir Hulya , Sanal Filiz
Published: July 2020

The aim of this study was to investigate the changes of some biochemical parameters during the amelioration after period o short term treatment of wheat with arsenic, cadmium and lead. A decrease was observed in the experimental groups, in which 15 μM, 30 μM, and 60 μM (arsenic, lead, and cadmium) metal ion mixture was applied, in terms of the germination rate depending on the increased concentration, and a decrease was observed in the root and stem dry weights of the plants in all groups. MDA levels were determined to increase at all doses. It was determined that heavy metals accumulated by increasing in the tissues due to the increased concentration of heavy metals in the heavy metal ion-applied groups. There were significant changes in the expression levels of antioxidant enzymes. As a result, it was determined in the study that there were significant changes in some biochemical and physiological parameter�s which are the primary response to oxidative stress in plants exposed to heavy metals, depending on the stress. This reason it can be concluded that arsenic, lead and cadmium contents in media can be the responsible for growth inhibition.
The Role of Molecular Typing for DQ2 and DQ8 Alleles Using Polymerase Chain Reaction Amplification in Children with Autoimmune Conditions
Authors: Belei Oana , Dobrescu Andreea , Iacob Emil Radu , Iacob Daniela , Amaricai Elena , Marginean Otilia
Published: July 2020

The aim was to determine the prevalence of celiac disease (CD) in a pediatric population with juvenile idiopathic arthritis (JIA) and autoimmune hepatitis (AIH) compared to controls and to evaluate the clinical forms and human leukocyte antigen (HLA) alelles. Between September 2009-November 2019, 74 pediatric patients with JIA (1), 62 AIH (2) and 60 controls were assessed for CD. All children with one or more positive CD antibodies were submitted to gastrointestinal endoscopy with intestinal biopsy. All patients underwent HLA molecular assessment for DQ2/DQ8 alleles. Celiac prevalence after screening was 6.7% in the first group, 6.4% in the second group and 0% among controls. The results didn�t reveal significant differences regarding the CD prevalence among patients with JIA and AIH (p = 0.94). The majority of cases associated the silent form of disease (77.7). DQ2/DQ8 haplotypes were found in all CD cases. Of 69 children with JIA and no CD, three (4.3%) had DQ2 haplotype. Of 58 patients with AIH and no CD, 37 children (63.8%) presented DQ2/DQ8. According to the high prevalence obtained in this study, JIA and AIH are good parameters for stratification of asymptomatic cases in order to perform CD serologic screening. The absence of DQ2 or DQ8 haplotypes will make CD diagnosis unlikely and no further tests will be required.
The Impact of Endocrine-Disrupting Chemicals on Female Fertility
Authors: Petca Aida , Maru Nicoleta , Dumitrascu Mihai Cristian , Sighencea Madalina , Sandru Florica , Farcasanu Patricia Delia , Mehedintu Claudia , Petca Razvan-Cosmin
Published: July 2020

Nowadays, infertility is a prevalent problem among couples. Exposure to endocrine-disrupting chemicals (EDCs) may influence the female reproductive outcomes through multiple mechanisms, being one of the important causes of infertility. These compounds may interfere with some fertility and fecundity markers, leading to increased time to pregnancy, increased risk of spontaneous abortion, shorter menstrual cycles, early age at menopause, anovulation or delayed ovulation, smaller preovulatory follicles, increased serum FSH, decreased synthesis of estradiol and progesterone, low plasma levels of anti-Mullerian hormone and decreased antral follicle count. Endocrine-disrupting chemicals may also impair in vitro fertilization outcomes, being responsible for: a lower probability of implantation, reduced fertilization rates, diminished probability of clinical pregnancy, and near term pregnancies after in vitro fertilization. Another mechanism of altering the female reproductive function is through the disorders induced by EDCs, such as polycystic ovary syndrome, uterine fibroids, and endometriosis. Those conditions may finally lead to infertility.
COVID-19 Vaccine: A Global Race
Authors: Earar Kamel , Atudorei Vania , Mahmoud Isteqlal Sami Nazmi , Arbune Manuela , Harabor Valeriu Romulus , Schipor Ovidiu , Bratu Ana Magdalena , Serban Cristina , Dragosloveanu Serban , Fotea Silvia , Nechita Aurel
Published: July 2020

The emergence of the new coronavirus SARS-CoV-2, at the end of 2019, triggered the worst pandemic of the last century, called COVID-19. Unlike SARS-CoV-1, which developed as an epidemic in 1996 but was limited to Asia, the new SARS -CoV-2 spread rapidly to millions of people worldwide, with a high mortality rate. Deciphering the structure of the viral S and SARS-CoV genome-2 allowed the identification of targets for vaccination, the most important being the viral protein S. The development of -COVID-19 vaccines is based on use innovative biotechnologies, some even experimental. Experience in vaccines SARS-CoV-1-MERS-CoV and may be useful for designing bad vaccine by emerging virus of SARS-CoV-2. Developing a vaccine anti-COVID-19 efficient, safe and accessible in the shortest possible time, remains the biggest challenge overall, in the race to limit pandemic today.
Influence of Excess Biological Sludge Disintegration Processes on Pharmaceutical Compounds, Hormones and PAH Concentrations from Anaerobic Stabilized Sludge
Authors: Ionescu Ioana Alexandra , Patroescu Viorel , Stefanescu Mihai , Iancu Vasile , Chiriac Florentina Laura , Damian Constantin
Published: July 2020

This paper shows the influence of certain biological sludge disintegration processes over the concentrations of emerging pollutants, including classes of structurally different compounds such as pharmaceuticals, hormones and polycyclic aromatic hydrocarbons from anaerobic stabilized sludge. Three processes for sludge disintegration were tested: ultrasonic, ultrasonic + electrokinetic and ultrasonic + electrokinetic + microbubble generation. Activated sludge from an urban wastewater treatment plant was used in the experiments. Both pharmaceuticals from the analgesic and antipyretic classes, as well as the identified hormones (estrone) and polycyclic aromatic hydrocarbons (PAHs), were sensitive to the disintegration processes applied, the experimental results showing the decrease of their concentration correlated with the increase of the disintegration energy.
Research on Shrinkage Chemical Properties of Cement Stabilized Macadam Material Based on a Multi-dimensional Expansion and Shrinkage Tester
Authors: Fei Aiping , Zhang Wensheng , Zhang Tiezhi
Published: July 2020

In order to find out the shrinkage law of cement stabilized macadam material under specific conditions, this paper studied the expansion and shrinkage properties of cement stabilized macadam material under two environmental conditions, five kinds of cement dosage conditions, suspended compacted type and skeleton compaced type based on the multi-dimensional expansion and shrinkage tester. Through the test comparison, it is confirmed that the water loss rate of cement stabilized macadam material increases with the increase of cement dosage, showing a general change rule of rising first and then stabilizing. The average increase of the total water loss rate of suspended compacted cement stabilized macadam at room temperature was greater than that of the skeleton compacted cement stabilized macadam. The dry shrinkage strain also follows the above trend. Either at room temperature or under the conditions of dry shrinkage box, the water loss rate of suspended compacted cemeny stabilized macadam is higher than that of skeleton compacted cement stabilized macadam , which can be up to 3.23% higher. By comparing the temperature shrinkage coefficient under the high and low temperature environment, the temperature coefficient of the skeleton compacted cement stabilized macadam is smaller than that of the suspended compacted cement stabilized macadam. The temperature shrinkage coefficient of the suspended compacted cement stabilized macadam increases by 5.56% on average for each 0.5% increase of the cement dosage, and the temperature shrinkage coefficient of the skeleton compacted cement stabilized macadam increases by 6.33% on average. Through the comparative analysis of tests, it can be found that the anti-reflection crack ability of the skeleton compacted cement stabilized macadam material is better, and the fine aggregate content should be strictly controlled in the construction.
Fire-resistance Rating of Square Steel Tubes and Concrete-filled Square Steel Tubular Columns Protected with Ultra-thin Fire-retardant Coating
Authors: Wu Ansheng , Zhang Bo , Tian Le
Published: July 2020

To promote and criterionize the application of ultra-thin the fireproof coating s to building structures, four concrete-filled square steel tubular (CFSST) pillars as well as two square steel tubes, each protected along with ultra-thin the fireproof coating , were subjected to full-scale fire tests to investigate their fireproof level on the basis of the ISO 834 criterion time�degrees curve. Test results revealed not only the temperature variation characteristics of specimens suffered from inconsistent fire exposure, but also effects of the steel ratio of the test specimen and the number of fire-exposed sides on the fire-refractory level of the test specimen. Test results demonstrated that when protected with an ultra-thin the fireproof coating , the heating rate of the specimens was considerably lower than that of the test furnace, suggesting that the ultra-thin the fireproof coating exhibits good thermal insulation performance. The test results were compared with China�s current criterions for the fire-refractory level of square steel tubes and CFSST pillars, indicating that the criterions would lead to a relatively conservative fire-safe design for four-side fire exposure.
Effects of Exogenous SA and H2O2 on Wheat-Seedling�s Antioxidant Enzymes in Different Temperatures
Authors: Fang Baoting , Li Xiangdong , Du Simeng , Shao Yunhui , Wang Hanfang , Yue Junqin , Zhang Deqi , Yang Cheng , Qin Feng , Wang Yanjing
Published: July 2020

In order to clarify the compensation effect of exogenous salicylic acid (SA) and H2O2 on wheat growth, this paper, by setting different growth temperatures in the artificial climate chamber, has studied the effects of antioxidant enzymes and proline content of wheat seedlings with spraying SA, hydrogen peroxide (H2O2) and SA+H2O2. The results show that catalase (CAT) activity, in 0 and 5 �C is lower than 10 and 15 �C, while the peroxidase (POD) activity is opposite. The activity of ascorbate peroxidase (APX) increases gradually with temperature increasing. Exogenous SA, H2O2, and SA+H2O2 could effectively improve the activity of wheat antioxidant enzymes and the content of proline (Pro), while the SA+H2O2 treatment improves obviously.
First record of Centris hyptidis Ducke, 1908 (Hymenoptera: Apidae: Centridini) in State of Maranhão, Brazil
Authors: Neves Jr Carlos L. , Barros Harryson , Rêgo Márcia
Published: July 2020

The unprecedented record of the species Centris (Paracentris) hyptidis Ducke, 1908 in the State of Maranhão, Brazil, is documented. A single female was collected during a visit on a Chamaecrista ramosa (Vogel) (Fabaceae) flower on an island in the America’s Delta, Maranhão (-2.715922, -42.200054), which is deposited in the Bee Collection of the Federal University of Maranhão. Such appointment contributes to the knowledge of the faunal composition of bees in the State of Maranhão, as well as the distribution of the species C. hyptidis in Brazilian territory.