bluuebunny/crossref_metadata_2025 huggingface dataset:
PEMIJAHAN SEMI-BUATAN SIPUT GONGGONG, Laevistrombus turturella DENGAN INDUKSI KOMBINASI HORMON LHRH-a DAN ANTIDOPAMIN
Authors: Muzahar Muzahar - , Jr. Muhammad Zairin , Yulianda Fredinan , Suprayudi Muhammad Agus , Alimuddin Alimuddin , Effendi Irzal
Published: March 2020

Gonggong adalah sejenis siput laut yang merupakan makanan laut (seafood) favorit dan ikon Kota Tanjungpinang, ibukota Provinsi Kepulauan Riau (Kepri). Gonggong mengandung protein tinggi, yaitu sekitar 46,65%. Tidak ada laporan tentang produksi budidaya dan upaya konservasi gonggong. Teknologi produksi benih buatan gonggong belum berkembang. Tujuan penelitian ini adalah untuk mengevaluasi pemberian kombinasi hormon LHRH-a dan antidopamin untuk menginduksi proses pemijahan. Evaluasi pemberian hormon LHRH-a dan antidopamin pada pemijahan siput gonggong dilakukan dengan empat dosis: 0,5 ìLgÎ¹ bobot badan lunak (BB) (P1); 0,7 ìLgÎ¹ BB; dan 0,9 ìLgÎ¹ BB (P2); dan tanpa suntikan (TS). Siput gonggong pascasuntikan dipelihara di akuarium selama 14 hari. Hasil penelitian menunjukkan bahwa (1) kombinasi hormon LHRH-a dan antidopamin mampu merangsang pemijahan gonggong. Dosis rendah hormon LHRH-a dan antidopamin (P-1) menghasilkan induk betina yang memijah paling banyak, yaitu 34,48%; lebih tinggi dari P-2 (27,59%), P-3 (20,69%); dan TS (17,24%); (2) jumlah telur yang dikeluarkan oleh induk betina berbeda secara signifikan antar perlakuan (P<0,05). Jumlah telur yang dikeluarkan oleh masing-masing induk berkisar antara 10.874-63.489 butir/ekor dengan rata-rata 39.347 ± 16.667 butir/ekor.The gonggong is a species of sea conch which is a favourite seafood and an icon of Tanjungpinang City, capital of Kepulauan Riau (Kepri) Province. Gonggong contains high protein, about 46.65%. There were no reports on aquaculture production and conservation effort of gonggong. The technology on artificial seed production of gonggong has not yet developed. The aim of this study was to evaluate the administration of LHRH-a hormone and anti-dopamine to induce the spawning process. Evaluation of the administration of LHRH-a hormone and anti-dopamine on the gonggong conch’s spawning was carried out with four doses: 0.5 ìLgÎ¹ soft body weight (BW) (P-1), 0.7 ìLgÎ¹ BW; and 0.9 ìLgÎ¹ BW (P-2); and without injections (TS). The gonggong conchs after injection were reared in aquarium for 14 days. The results showed that (1) a combination of LHRH-a hormone and anti-dopamine was able to stimulate gonggong spawning. The lower dose of LHRH-a hormone and anti-dopamine (P-1) produced the highest number of spawned female broodstock, which was 34.48%, higher than P-2 (27.59%), P-3 (20.69%), and TS (17.24%); (2) the number of eggs released by female broodstock was significantly different among the treatments (P<0.05). The number of eggs released by each female broodstock ranges between 10,874-63,489 grains/ind. with an average of 39,347±16,667 grains/ind.
PERBANYAKAN TANAMAN HIAS AIR Microsorum pteropus MELALUI KULTUR KANTONG SPORA PADA BERBAGAI SUBSTRAT
Authors: Yamin Muhamad , Kadarini Tutik , Solichah Lili
Published: March 2020

Produksi massal tanaman hias air pakis jawa Microsorum pteropus melalui pemotongan rhizoma terlihat kurang efisien sedangkan melalui kultur in vitro spora masih sulit dilakukan masyarakat. Salah satu pendekatan baru dalam perbanyakan tanaman M. Pteropus melalui kultur kantong spora telah berhasil dilakukan. Tujuan penelitian adalah untuk menentukan media dalam perbanyakan tanaman M. pteropus melalui kultur kantong spora. Potongan daun yang mengandung satu kantong spora diletakkan di atas media tanam, ditutup dengan plastik transparan, dan ditaruh pada lingkungan di luar ruangan (outdoor). Media tanam yang digunakan yaitu: A) cacahan akar pakis; B) serutan kayu; C) cacahan akar pakis + serutan kayu; D) cacahan akar pakis + serutan kayu + kompos; E) pasir gunung berapi (pasir malang); F) abu sekam padi; G) pasir; dan H) tanah. Hasil penelitian menunjukkan bahwa perkembangan sporofit muda (young sporophye) sudah mulai terlihat pada bulan pertama sampai ketiga setelah tanam. Sporofit muda yang berkembang dari kantong spora yang dipelihara pada media pasir, media tanah dan media campuran serutan kayu + akar pakis + kompos menunjukkan rata-rata persentase tanaman hidup yang paling tinggi yaitu 48%. Sebaliknya sporofit muda paling sedikit berkembang pada media akar pakis, media abu sekam padi dan media campuran akar pakis, dan serutan kayu. Berdasarkan hasil tersebut maka media terbaik untuk perbanyakan M. pteropus di luar ruangan melalui kultur kantong spora adalah media tanah dan media campuran akar pakis + serutan kayu + kompos.Mass production of Microsorum pteropus through rhizome cuttings has been deemed not efficient while the application of in vitro culture of its spores is still technically difficult to be performed by farmers. A novel approach to mass-produce M. pteropus trough sori culture has been developed and is relatively easy to perform. This study was aimed to determine a suitable propagation media for sori culture of M. pteropus. Small cut fronds containing one sorus were laid on the culture media and covered with a transparent plastic sheet and left on outdoor conditions. The culture media used were: A) fern-root; B) wood shavings; C) fern-root + wood shavings; D) fern-root + wood shavings + compost; E) volcanic sand; F) rice husk ash; G) sand; and H) soil. The results showed that young sporophytes developed in the 1st to 3rd month after culture. The young sporophytes developed in the sand, soil and mixture of wood shavings + fern-root + compost medium showed higher numbers of live plants (48%). In contrast, the lower numbers of live young sporophyte were found in the fern-root, rice husk ash, and mixture of fern-root + wood shavings medium. Based on these results, the best alternative media for propagation of M. pteropus through sori culture on the outdoor conditions are soil media and the mixture of fern roots + wood shavings + compost media.
Student Perspectives on Ophthalmology Training in The Slovak Medical Education System: A Pilot Study
Authors: Shiwani Haaris , Aziz Muhammad Shaheer , Memon Danyal , Elfaki Mohammed Yagoub , Zulfiqar Usama , Aziz Abdul
Published: March 2020

This article was migrated. The article was not marked as recommended. Introduction: Conditions of the eye and vision seen in ophthalmology constitute some of the largest disease burdens in the world. Evidence from other parts of the world indicate that exposure to ophthalmology in medical school can be lacking. We aimed to conduct a pilot study assessing students' exposure to, and confidence in treating, common ophthalmic conditions. We hoped to see how this compares to a global cohort and whether there are indications that the nature of ophthalmology teaching in Slovakia necessitates change. This will further inform the need to expand the study nationally to more accurately distinguish areas of improvement. Methods: A single-centre cross-sectional survey was conducted at Univerzita Pavla Jozefa Šafárika v Košiciach, Slovakia. A 24-item questionnaire was distributed to final year medical students via a web-based platform and was available to complete for a period of 1 week. Results: A total of 25 responses were collected from approximately 100 students (25% response rate). 7/25 (28%) respondents declared an interest in ophthalmology as a future career option, with males predominating [8% of females vs. 50% of males, OR = 0.09, CI = 0.009-0.0943, P=0.045]. 40% of individuals, however, reported a lack of adequate exposure to make an informed decision. Average hours of clinical placement and classroom teaching equated to 1.5 ± 0.6 weeks (mean ± SD) and 18 ± 13 hours, respectively. 13/25 (52%) students reported adequate teaching in direct ophthalmoscopy and slit lamp examination. 15/25 (60%) of respondents reported inadequate clinical exposure. 7/25 (28%) of participants reported having witnessed cataract surgery, whereas 14 (56%) reported having not seen any ophthalmic surgery. 9/25 (36%), 15/25 (60%), 7/25 (28%), 7/25 (28%) and 13/25 (52%) of students felt competent in managing cataract, conjunctivitis, glaucoma, diabetic eye disease and dry eye, respectively. Conclusions: From this pilot study we have identified that there is a relative lack of confidence in managing common eye conditions among this select cohort of students and this may stem from a lack of clinical exposure or classroom teaching hours. This warrants further evaluation with a larger, national cohort.
Phase II Multicenter, Open-Label Study of Oral ENMD-2076 for the Treatment of Patients with Advanced Fibrolamellar Carcinoma
Authors: Abou-Alfa Ghassan K. , Mayer Robert , Venook Alan P. , O'Neill Allison F. , Beg Muhammad S. , LaQuaglia Michael , Kingham Peter T. , Kobos Rachel , Basturk Olca , Brennan Cameron , Yopp Adam , Harding James J. , Leong Stephen , Crown John , Hoti Emir , Leonard Gregory , Ly Michele , Bradley Mikaela , Valentino Emily , Markowitz David , Zukiwski Alexander , Ren Ken , Gordan John D.
Published: March 2020

Lessons Learned

The fibrolamellar carcinoma-associated DNAJB1-PRKACA gene fusion transcript RNA codes for the catalytic domain of protein kinase A and, thus, overexpression of Aurora kinase A. ENMD-2076 showed a favorable toxicity profile. The limited results, one patient (3%) with a partial response and 57% of patients with stable disease, do not support further evaluation of ENMD-2076 as single agent. Future studies will depend on the simultaneous targeting approach of DNAJB1-PRKACA and the critical downstream components.

Background

Fibrolamellar carcinoma (FLC) represents approximately 0.85% of liver cancers. The associated DNAJB1-PRKACA gene fusion transcript RNA codes for the catalytic domain of protein kinase A and overexpression of Aurora kinase A (AURKA). ENMD-2076 is a selective anti-AURKA inhibitor.

Methods

Patients aged >12 years with pathologically confirmed incurable FLC, with measurable disease, Eastern Cooperative Oncology Group performance status 0–2 or Lansky 70–100, and adequate organ function were eligible. Patients were prescribed ENMD-2076 based on body surface area. The primary endpoint was overall objective response rate by RECIST v1.1, with a null hypothesis of true response rate of 2% versus one-sided alternative of 15%. Secondary endpoints included 6-month progression-free survival (PFS) rate (Fig. 1), median PFS, time to progression (TTP), and overall survival (OS). Safety was evaluated throughout the study.

Results

Of 35 patients who enrolled and received treatment, 1 (3%) had a partial response (PR) and 20 (57%) had stable disease (SD). Median TTP, PFS, and OS were 5, 3.9, and 19 months, respectively. The most frequently reported drug-related serious adverse event was hypertension in three patients. Three deaths were reported on-study—two due to disease progression and one due to pulmonary embolism not related to ENMD-2076.

Conclusion

The study provided no rationale for further studying ENMD-2076 as a single agent in FLC.
Controlled growth of hexagonal nanocrystals Co and Gd co-doping ZnO by hydrothermal method
Authors: Alrowaili Ziyad A , Abdeltwab Eslam , Atta Ali , Taher Fatma A
Published: March 2020

The control of nanostructured zinc oxide (ZnO) materials is essential for the development of smart and functional nanoscale devices. Using controlled hydrothermal growth conditions, cobalt (Co)- and gadolinium (Gd)-co-doped zinc oxide hexagonal nanocrystals were synthesized at a low temperature (70°C). The role of hexamethylenetetramine (HMTA; C6H12N4) in engineering pure and doped zinc oxide morphology was examined. The results indicated that the hexagonal plates are transformed into a hexagonal flowerlike structure by changing the molar ratio of HMTA/precursors. The possible growth mechanism of the formation of hexagonal nanocrystals (hexagonal plates and nanoflowerlike structure) is discussed. The magnetic properties exhibited enhanced ferromagnetism after the incorporation of gadolinium into the zinc oxide matrix. An enhancement in saturation magnetization is discussed mainly in correlation with the strain effect. These doped zinc oxide nanostructures are expected to drive improvements mainly in the performance of spintronic devices.
Ütopya Kavramın Kökenleri ve Erken Dönem Modern Mimari Üzerindeki Etkisi
Authors: MİKAEİLİ Mahshid
Published: March 2020

Ütopya kavrami zengin bir içeriğe sahip olarak, felsefe, siyaset, sanat, mimari, kent ve mekân gibi farklı bilim dallarının çalışma alanı olmuştur. Bu kavram, tarihin farklı dönemlerinde, doğu ve batılı düşünürler tarafından, ortaya konulan bir başlık olarak tanımlanır. Antik çağlardan beri, kentler toplumsal ve siyasal yaşamın ortak alanını temsil ederek, ütopya kavramının vazgeçilmez mekânı olarak tanımlanmıştır. Kent ütopyalarının oluşumu, insanların kentlere dair düşleri, umutları, beklentileri olarak, oluşan ilk yerleşimler kadar eskiye dayanmaktadır. Kentler ütopya kavramında, ideal yaşam, ideal toplum ve ideal yönetimin gerçekleştiği mekânlar olarak tanımlanırlar. Kentler, sanayi dönemine kadar, mekânsal örgütlenme ve toplum arasında, uyum ve dengeni sağlayan ve iyi yer kavramını sürdüren alanlar olarak tanımlanmaktadır. Kent ütopyaları, kentsel sorunları özgün bir biçimde ifade ederek, farklı çözüm yolları da göstermişler bir bakımda, yaşadıkları dönemin devrimci manifestolarını sunmuşlardır. Sanayı devriminden günümüze kadar, bir yandan yaşanan teknik ve bilimsel gelişmeler ile sosyal hareketler sayesinde kent formları değişmiştir, öte yandan insanların yaşam koşullarının değişmesinden dolayı oluşan kent ütopyalarında da değişimler ortaya çıkmaktadır. Bu dönemin ütopyalarında mimarlık ve kentsel planlama, ideal-kent kavramının gerçek temsilcileri olarak görülmektedir. Dolayısıyla, mimarlar ve kent tasarımcıları, iyi ve ideal yaşam biçimine erişmek için, iyi binalar ile meydan ve sokakların tasarım ve üretilmesine çalıştılar.ABSTRACTBased on the rich content of utopia concept, utopia has become the study’s field of the different disciplines such as philosophy, politics, art, architecture, urban and spatial designing. The date of the first urban utopia come back to the first human settlement, and these utopias were shaped based on the human dreams, hopes, and expectations. In the conceptual framework of utopia, cities are defined as a place for an ideal life, ideal society, and ideal management. Until the industrial revolution cities are defined as areas that provide harmony and created balance between spatial organization, society and maintain the “Good Place” concept.  Urban utopias have expressed different ways of explaining the urban problem and use specific ways for solving these problems. More precisely, the utopias have presented the revolutionary manifestos in their times. From industrial revolution up to the present, from one hand the city forms have been changed based on the technical and scientific developments and social movements, on the other hand the changes have been occurs in the urban utopias concept. So in this period, the concept of utopias are seen as real representatives of the ideal city based on architectural and urban planning.
Impact of Digital Economy on Public Employment in Terms of Economic Inequality Between Territories
Authors: Tagarov Bato
Published: March 2020

The article examines the impact of developing digital information technologies on the labor market and public employment. At the same time, it analyses separately the impact of the digital economy on the territories with a relatively low standard of living and high unemployment. The author presents the data for the state of the process of digitalization of Russia’s economy and makes a conclusion of high development level of tre information infrastructure, noting, at the same time, the existence of a strong gap in the level of digitalization between the regions. In assessing the impact of the Internet technologies development on public employment, two main consequences are identified: a decrease in the impact of the geographical factor on demand and supply on the labor market and involvement of previously unemployed social groups in the production process. The results of these consequences are divided into opportunities and threats to the population, whereby their analysis is carried out separately for the population of the periphery.
On the Structure of Modern Economy
Authors: Ambrosov Nikolay , Markina Marina
Published: March 2020

A study of three economic systems: a free market, a planned economy and a mixed economic system was carried out. The types of economies of the most developed countries were determined as a mixed type of economy. This type of system is more stable, since it contains the stabi­lity of a planned economy and the efficiency of a market economy. The authors base their research on the scientists’ opinion that the ratio of the economic activity of the state and the large business as a planned core of the economy and the market sector, which is represented by small and medium businesses, is a determining factor in achieving positive dynamics. Thus, it becomes necessary to identify the optimal level of this ratio. Since the organization level of developed countries can be considered formed, it is assumed that there are factors contributing to this state. Having identified these factors, we can formulate an effective development strategy for countries. It is assumed that the results of the study can help determine the development strategies of both transiti­onal economies and those that demonstrate poor quality of functioning.
Evolution of Professional Participants in Russian Securities Market
Authors: Alekseeva Irina , Ovchinnikova Ksenia
Published: March 2020

The securities market is one of the most important segments of the financial market of any state. The development of the Russian securities market can be judged on the basis of the development of its participants, their evolution. An analysis of today’s economic scientific literature shows an insufficient coverage of the evolution of professional participants in the domestic stock market. The article considers the changes in the composition of professional participants of the securities market, analyzes the regulatory framework that have given rise to these changes. It brings forth the reasons for the changes and expectations of financial market participants from the changes, presents the dynamics of the number of over the period of 2008–2018. The article reveals a sharp decline in the number of professional participants, determines the causes of this trend. It places an emphasis on the significance of including the investment advisors in the ranks of professional participants of the securities market in order to increase public involvement in the investment activity.
AKTİF ÖĞRETİM YÖNTEMLERİNİN, MATEMATİK BAŞARISINA ETKİSİ: BİR META-ANALİZ ÇALIŞMASI
Authors: SARIER Yılmaz
Published: March 2020

Türkiye’de matematik öğretiminde;
bilişim teknolojileri, işbirlikli, drama, oyun, kavram haritaları,
görselleştirme, karikatür, çalışma yaprakları gibi alternatif öğrenme-öğretme
yaklaşım ve materyalleri kullanılarak öğrenci başarısının yükseltilmesine çalışılmaktadır.
Bu çalışmada, Türkiye’de aktif öğretim yöntemlerinin matematik başarısı
üzerindeki etkilerini inceleyen araştırmaların bulgularını birleştirmek,
ortalama etki büyüklüğü değerini hesaplamak ve büyük resmi ortaya koymak
amaçlanmaktadır. Bu araştırmanın yöntemi, literatür tarama yöntemlerinden biri
olan meta-analiz yöntemidir. Bu bağlamda çalışmada, Türkiye’de 01.01.2000 ile 31.12.2017 tarihleri
arasında üretilmiş 112 çalışma analiz edilmiştir. Yapılan çalışmada, aktif
öğretim yöntemlerinin öğrencilerin matematik başarısını pozitif yönde geniş
düzeyde (ES-Etki büyüklüğü: .998) etkilediği gözlenmiştir. Türkiye’de aktif
öğretim yöntemlerinin amacına uygun kullanımını yaygınlaştırmak, özellikle bu
yöntemlerin eğitim alanındaki avantajlarından yararlanmak için kolaylıklar
sağlamak ve teknolojik yeniliklere ayak uydurmak için azami gayret göstermek
oldukça önemlidir. Ayrıca bu yöntemlerin, eğitim-öğretimin her kademesinde
yaygınlaştırılması ve bu uygulamaları teşvik edici çalışmaların yapılması,
süreçte kullanılacak materyallerin belirlenmesinde, öğrencilerin yaşları, ilgi
ve yetenekleri, bilgi düzeyleri ve dersin konuları dikkate alınmalıdır.
METAPHORIC PERCEPTIONS OF PRESERVICE COMPUTER EDUCATION AND INSTRUCTIONAL TECHNOLOGIES TEACHERS ON VIRTUAL CLASSROOMS
Authors: ERTEN Pınar
Published: March 2020

The purpose of
this study is to determine the metaphoric perceptions of preservice Computer
Education and Instructional Technologies (CEIT) teachers on virtual classrooms.
The study was conducted with 178 students studying in year 2., 3. and 4. in the
department of CEIT. The reason why these students were selected was because
they had pre-knowledge about virtual classroom implementations. During the
study, forms including a fill-in-gap sentence “The virtual classroom is like
a/an ………………; because …………….” were distributed to the students. Metaphors
created by students on virtual classrooms and the common features of these
metaphors were tried to be identified through these forms. The 81 metaphors
that preservice teachers developed concerning virtual classrooms were divided
under 38 categories. Among the categories that the students formed on virtual
classrooms were positive categories such as being the same with real
classroom-school setting, being virtual, providing time-space independence,
ensuring interaction and communication, easy accessibility and repeatability
and negative categories such as undisciplined, being non-social and lack of
interaction.
ÖĞRENCİLERİN MATEMATİK DERSİNE İLİŞKİN KORKU NEDENLERİNİ BELİRLEMEYE YÖNELİK BİR ÖLÇEĞİN GELİŞTİRİLMESİ
Authors: BAŞAR Murat , DOĞAN Midrabi Cihangir
Published: March 2020

Bu araştırma öğrencilerin matematik korkusunun nedenlerini belirlemeye yönelik bir ölçek geliştirmek amacıyla yapılmıştır. Çalışmanın örneklemini 2018-2019 öğretim yılında Uşak il genelinde ilkokul, ortaokul ve lise kademesinde öğrenim gören 2580 öğrenci oluşturmuştur. Ölçek geliştirme aşamaları kapsamında alan yazın taranmıştır. Ölçekle ilgili madde havuzunun oluşturulmasından sonra uzman görüşüne başvurulmuştur. Pilot çalışma, yapı geçerliliği ve güvenirliğinin tespiti çalışmaları yapılmıştır. Açımlayıcı faktör analizi sonucunda her biri beş sorudan oluşan öğretmenden kaynaklı matematik korkusu, çevreden kaynaklı matematik korkusu, matematiğin yapısından kaynaklı matematik korkusu, öğrencinin kendi kişisel özelliklerinden kaynaklı matematik korkusu boyutları oluşmuştur. Elde edilen dört boyut toplam varyansın yaklaşık %55’ini açıklamıştır. “Matematik Korkusunun Nedenleri Ölçeğinin” öğrencilerin matematik korkusunun nedenlerini ölçmede geçerli ve güvenilir bir ölçme aracı olduğu belirlenmiştir.
On certain issues of regulation of investigating judge`s authority to consideration of applications for temporary access to objects and documents
Authors: Lysachenko Ye.
Published: March 2020

Temporary access to objects and documents is one of the most common means of ensuring criminal proceedings and an important means of gathering evidence. This measure of criminal proceedings represents the undoubtedly basic instrument for the formation and consolidation of evidence, which will further serve as a legal basis for the promulgation of a correct and well-founded procedural decision by the investigator or prosecutor during a full, complete and impartial pre-trial investigation. The author of the article is intended to investigate the problematic issues of regulation of investigating judge`s authority to consideration of applications for temporary access to objects and documents. Attention is drawn to the lack of legislative regulation of the powers of the investigating judge to issue a decision on the return of the petition and the refusal to grant it in the case of non-compliance of such petition with the requirements of criminal procedural legislation. The decision of the investigating judge, type of which is not provided by the CPC of Ukraine, is contrary to the principle of the lawfulness of criminal proceedings, adversely affects the effective protection of the rights, freedoms and interests of the person in the framework of criminal proceedings, the effectiveness of criminal procedural evidence and the formation of unambiguous legal practice. The author concludes that in order to improve the institute of temporary access to objects and documents, the following changes should be made to the CPC of Ukraine: - Art. 163 as a rule on the procedural possibility of an investigating judge to return to a party of criminal proceedings a request for temporary access to things and documents, if it is filed without observing the requirements of Art. 160 CPC of Ukraine; - the norm of refusal to grant such a request in case of non-compliance with the requirements of Part 5 of Art. 163 of the CPC of Ukraine. In view of the above, the investigating judge will be empowered by law to rule on the results of the consideration of the request for temporary access to the things and documents of the decision on: 1) satisfaction of the request, 2) refusal to grant the request, 3) return of the request. The proposed amendments to the current CPC of Ukraine in terms of improving the procedure of temporary access to things and documents as a means of criminal procedural evidence, in particular the introduction of alternative types of rulings, will certainly increase the effectiveness of criminal procedural evidence, as well as ensure the effectiveness of the functioning of the investigative institution.
Optimal Third-Order Symplectic Integration Modeling of Seismic Acoustic Wave Propagation
Authors: Li Chuan , Liu Jianxin , Chen Bo , Sun Ya
Published: March 2020

Seismic wavefield modeling based on the wave equation is widely used in understanding and predicting the dynamic and kinematic characteristics of seismic wave propagation through media. This article presents an optimal numerical solution for the seismic acoustic wave equation in a Hamiltonian system based on the third-order symplectic integrator method. The least absolute truncation error analysis method is used to determine the optimal coefficients. The analysis of the third-order symplectic integrator shows that the proposed scheme exhibits high stability and minimal truncation error. To illustrate the accuracy of the algorithm, we compare the numerical solutions generated by the proposed method with the theoretical analysis solution for 2D and 3D seismic wave propagation tests. The results show that the proposed method reduced the phase error to the eighth-order magnitude accuracy relative to the exact solution. These simulations also demonstrated that the proposed third-order symplectic method can minimize numerical dispersion and preserve the waveforms during the simulation. In addition, comparing different central frequencies of the source and grid spaces (90, 60, and 20 m) for simulation of seismic wave propagation in 2D and 3D models using symplectic and nearly analytic discretization methods, we deduce that the suitable grid spaces are roughly equivalent to between one-fourth and one-fifth of the wavelength, which can provide a good compromise between accuracy and computational cost.
Ryzyko dysleksji a strategie radzenia sobie w sytuacjach trudnych społecznie przez dzieci w młodszym wieku szkolnym
Authors: Kowaluk-Romanek Marzena Agnieszka
Published: March 2020

Przeprowadzone badania własne wpisują się w nurt doniesień empirycznych dotyczących radzenia sobie w sytuacjach trudnych przez dzieci. Ich celem była próba odpowiedzi na pytanie, czy i w jaki sposób ryzyko dysleksji wpływa na radzenie sobie w sytuacjach trudnych społecznie przez dzieci w młodszym wieku szkolnym. Badaniami objęto 64 uczniów klas II i III szkół podstawowych województwa lubelskiego. Grupę podstawową stanowili uczniowie ze zdiagnozowanym ryzykiem dysleksji, porównawczą zaś – ich rówieśnicy niemający specyficznych trudności w uczeniu się. Badania wykazały, że między grupami zachodzą różnice istotne statystycznie w obrębie dwóch skal: współpraca i unikanie. Dzieci ryzyka dysleksji w sytuacjach trudnych społecznie zdecydowanie rzadziej niż ich rówieśnicy stosują strategię współpracy. Zamiast efektywnej strategii radzenia sobie w sytuacjach stresowych pojawiają się u nich różnorodne – nieukierunkowane na rozwiązanie i przezwyciężenie problemu – sposoby obrony. Dominuje u nich strategia unikania. W porównaniu z rówieśnikami zdecydowanie częściej nie podejmują działań zmierzających do rozwiązania sytuacji trudnej. Dzieci ryzyka dysleksji oraz dzieci bez trudności w uczeniu się z podobną częstotliwością stosują nieefektywne strategie radzenia sobie w sytuacjach trudnych, takie jak: agresja i uleganie.
Rekonstrukcja pamięci domu rodzinnego a źródła zainteresowań zadaniami ponadosobistymi
Authors: Remiszewska Zofia
Published: March 2020

W artykule wykorzystałam fragmenty moich badań, przygotowanych na podstawie wywiadów narracyjnych. Główny przyjęty przeze mnie problem badawczy sformułowałam w formie pytania: jakie znaczenie ma rodzina w kształtowaniu postaw prospołecznych u tych osób, które realizują zadania ponadosobiste? Poszukuję również odpowiedzi na pytanie: czy w biografii własnej i rodziny można odnaleźć źródła zainteresowania problematyką społeczną? Dzięki zastosowaniu wywiadów narracyjnych mogłam zrozumieć elementy rzeczywistości badanych. Mogłam dokonać wglądu w źródła i doświadczenia związane z realizacją zadań ponadosobistych badanych osób. Ich subiektywne interpretacje swoich zachowań, przeżyć związanych z różnymi sytuacjami, osobami, wydarzeniami, dały obraz znaczenia rodziny w formowaniu postaw prospołecznych.
Antioxidant Potential and Element Contents of Wild Edible Mushroom Suillus granulatus
Authors: MUSHTAQ Waseem , BABA Hayri , AKATA İlgaz , SEVİNDİK Mustafa
Published: March 2020

Mushrooms are important natural resources in natural ecosystems. They have been used for centuries as a means of food, medicine and religious rituals for humans. In this study, total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI) and Cr, Cu, Mn, Fe, Ni, Cd, Pb and Zn contents of edible mushroom Suillus granulatus (L.) Roussel were determined. Mushroom samples were collected from Hatay-Antakya (Turkey). Ethanol extracts of mushroom samples were obtained. TAS, TOS and OSI values were measured using Rel Assay kits. Cr, Cu, Mn, Fe, Ni, Cd, Pb and Zn contents were determined by atomic absorption spectrophotometer. As a result of the study, TAS value of S. granulatus was 3.143 ± 0.068 mmol/L, TOS value was 18.933 ± 0.195 µmol/L and OSI value was 0.603 ± 0.007. Cr content of S. granulatus was found to be high. As a result, wild edible mushroom S. granulatus had antioxidant potential.
Design and Development Paper Printout System for Gardu Tol Otomatis (GTO) based on Mechanical Approach
Authors: Suharjanto Gatot , Edi Nugroho Soebandrija Khristian , Rezasyah Erwin , Sakundarini Novita
Published: March 2020

The existence of Gardu Toll Otomatis (GTO), automatic toll payment, becomes a general model for every toll payment in Indonesia. Almost toll payment models in Indonesia have a paper printout as received which is often wasted. This condition happens since not all the driver needs a paper proof of the transaction. Therefore, the wasted paper will occur everywhere for 24 h. Furthermore, in this work the design of printout system using a more efficient printout model with rotation feeding method has developed printout system. In this work, the rotation mechanism system is applied through product design engineering through Industry 4.0. This system is made by removing the printout paper that remains present to the driver who needs it, but not wasted because of the driver who does not need it. There are three important steps as follows; in the first step, the printout paper appears in a special tray which is easy to reach and takes for those who need it. In the second step, the paper will remain in the tray for the driver who did not pick it up and final step, the tray with paper printout will rotate mechanically back into the GTO machine to be destroyed by a paper shredder. The experiment of the paper printout system has been carried out. The results show that the proposed approach produces a better accuracy and efficiency. Experimental results show the testing accuracy of 90 %. The system confirms the effectiveness of the proposed paper printout system for the GTO.
Keywords: digital technology; digital transformation; electronic banking; online payment; electronic wallet
Logistics and Supply Chain Engineering: Perspectives on Paperless System for Highway Automatic Tollgate (HAT) through Industry 4.0. in Indonesia
Authors: Suharjanto Gatot , Edi Nugroho Soebandrija Khristian
Published: March 2020

This paper elaborates discourse on Highway Automatic Tollgate (HAT) within logistics and supply chain engineering perspectives. The aforementioned HAT and its implementation are complying with the Product Design Engineering’s perspectives within theoretical and industrial implementation through Industry 4.0 in Indonesia. The objective of this paper is to intertwine the theoretical perspectives with industrial implementation. The industrial implementation constitutes the effort to implement paperless system for HAT in order to reduce wasted papers that are necessarily needed by user of this HAT, as transaction proof. The result and discussion of this paper comprise several discussions to be considered. To begin with, the result of this paperless system helps the cleaning service officers to reduce their cleaning duty. Furthermore, the result of this paperless system integrates the concept of industry 4.0 within scope of internet of things (IoT) and internet of everything (IoE). Subsequently, the discussion on this paper refers to the discourse on logistics and supply chain engineering perspectives, to ease the transaction proof involving big data. As a result, it reduces significantly the vehicle traffic and time needed to proceed to transaction in the aforementioned HAT. This paper refers to the research methodology within quantitative approach. As future research, it is indispensable to intertwine both aforementioned theoretical and industrial implementation. Both implementation, as future research, need to be integrated within the Asia Region.
Keywords: big data analytics; internet of things; making Indonesia 4.0; paperless mechanism; product design engineering
The Effect of Supplier Trust, Supplier Innovation, and Buyer-Supplier Relationship in Enhancing the Supplier Performance on the Death Service Companies in Surabaya, Indonesia
Authors: Jiwa Husada Tarigan Zeplin , Siagian Hotlan , Sutjianto Agnes , Wiliater Soaloon Panjaitan Togar
Published: March 2020

Changes in customer needs from a service company results in changes requirement from the supplier to meet the company’s demand. Excellent supplier performance is one of the mandatory requirements enabling the company to meet the customer demand. Better supplier performance can be improved when they have an excellent buyer-supplier relationship. The buyer-supplier relationship through better supplier trust from the buyer which means the company believes that the supplier can meet the needs of the company. Further, the supplier builds innovation providing better value to the company. This research examines the influence of supplier trust, supplier innovation, and buyer-supplier relationship to improve supplier performance at death service company in Surabaya. Data were collected by distributing questionnaires to 52 service suppliers in Surabaya. Data analysis using Partial Least Square (PLS) software. The findings show that all hypotheses are supported. There is a positive influence of supplier trust on supplier innovation and buyer-supplier relationship. Supplier-buyer relationship enhances the supplier innovation directly. Supplier innovation, buyer-supplier relationship, and supplier trust influence directly the supplier performance in death Services Company in Surabaya. This study provides new insight to the on-going research on the supply chain management. This work implies that manager can improve the supplier performance.
Keywords: Buyer-supplier interdependence; business relationship behavior; customer satisfaction; trust-performance correlation
Enhancing Prediction Method of Ionosphere for Space Weather Monitoring Using Machine Learning Approaches: A Review
Authors: Salleh Nor’asnilawati , Yuhaniz Siti Sophiayati , Sabri Sharizal Fadlie , Mohd Azmi Nurulhuda Firdaus
Published: March 2020

This paper studies the machine learning techniques that can be used to enhance the prediction method of the ionosphere for space weather monitoring. Previously, the empirical model is used. However, there is a large deviation of the total electron content of ionosphere data for the areas located in the equatorial and low-latitude regions due to the lack of observation data contributed by these areas during the development of the empirical model. The machine learning technique is an alternative method used to develop the predictive model. Thus, in this study, the machine learning techniques that can be applied are investigated. The aim is to improve the predictive model in terms of reducing the total electron content deviation, increasing the accuracy and minimizing the error. In this review, the techniques used in previous works will be compared. The artificial neural network is found to be a suitable technique and the most favorable from the review conducted. Also, this technique can provide an accurate model for time series data and fewer errors compared to other techniques. However, due to the size and complexity of the data, the deep neural network technique that is an improved artificial neural network technique is suggested. By using this technique, an accurate ionosphere predictive model in equatorial and low region area is expected. In the future, this study will analyze further by using computing tools and real-time data.
Case Study on Non-Functional Requirement Change Impact Traceability for Agile Software Development
Authors: Arbain Adila Firdaus , Abang Jawawi Dayang Norhayati , Wan Kadir Wan Mohd Nasir bin , Ghani Imran
Published: March 2020

Currently, it is crucial to develop a complex software on time. Agile software development methodologies provide methods to develop a system in term of time and cost-saving but it has been criticized for software quality management. In this paper, a case study is used to find out the need of NFR change impact traceability approach in most of Agile software methodology. This case study was conducted in an undergraduate course that trained the students on how to develop software using Agile process model.This case study has been conducted for 4 months in an undergraduate-level course, Application Development. The samples of this case study are among Year 3 undergraduate students. The case study shows the lack of traceability techniques in the existing Agile process model (SFDD- Secured Feature Driven Development) that result to non-awareness of NFR change impact during development. Based on the case study mentioned the main objective of the case study conducted in survey is to empirically test the theoretical constructs and the hypothesized relationships of the research issues that concern on the lack of change impact management towards NFR in Agile Software Methodology.  TANC (Traceability for Agile Non-Functional Requirement Change Impact) model offered techniques in tracing change impact during the agile development process. Therefore, the result of the case study, a traceability process model needs to design in order to tackle the NFR change impact issues in Agile software development.
Univariate Financial Time Series Prediction using Clonal Selection Algorithm
Authors: Azlan Ammar , Yusof Yuhanis , Mohamad Mohsin Mohamad Farhan
Published: March 2020

The ability to predict the financial market is beneficial not only to the individual but also to the organization and country. It is not only beneficial in terms of financial but also in terms of making a short-term and long-term decision. This paper presents an experimental study to perform univariate financial time series prediction using a clonal selection algorithm (CSA). CSA is an optimization algorithm that is based on clonal selection theory. It is a subset of the artificial immune system, a class of evolutionary algorithms inspired by the immune system of a vertebrate. Since CSA is an optimization algorithm, the univariate financial time series prediction problem was modeled into an optimization problem using a weighted regression model. CSA was used to search for the optimal set of weights for the regression model to generate prediction with the lowest error. Three data sets from the financial market were chosen for the experiments of this study namely S&P500 price, Gold price, and EUR-USD exchange rate. The performance of CSA is measured using RMSE. The value of RMSE for a problem is related to the maximum and minimum value of the data set. Therefore, the results were not compared to other data sets. Instead, it is compared to the range of values of the data sets. The result of the experiments shows that CSA can make decent predictions for financial time series despite being inferior to ARIMA. Hence, this finding implies that CSA can be implemented on a univariate financial time series prediction problem given that the problem is modeled as an optimization problem.
Improving the Accuracy of Ship Resistance Prediction Using Computational Fluid Dynamics Tool
Authors: Huynh Van Chinh , Tran Gia Thai
Published: March 2020

The ship resistance prediction using CFD tool has become an accepted method over the last decade; however, the CFD-based ship resistance results are not always accurate. This paper presents the approach of determining the input parameters of the CFD solution for ship resistance prediction, including of size and boundary conditions of the computational domain, and parameters of turbulent model in accordance with the geometric characteristics of hull to improve the accuracy of CFD-based resistance values for a specific ship type. Two same type of fishing vessels named FAO 72 and FAO 75 which are tested in towing tank are chosen as the computed ship to apply this approach for resistance prediction accurately. The CFD-based resistance results of these vessels are compared with corresponding model testing results to analyze accuracy and reliability of this approach as well as discussing the effect of the initial parameters of the CFD solution on the resistance results as mentioned. The research results shown that the accuracy of three dimensions (3D) model of computational ship, the appropriate values of computational domain size and turbulent model parameters for resistance prediction using CFD are the input factor to improve the accuracy of resistance values. Especially the specific values of computational domain size and turbulent model parameters are presented in this paper will be the input parameters to predict the resistance using CFD for the fishing vessels with the same geometric characteristics as the computed ship.
Bearing Fault Diagnosis Using Motor Current Signature Analysis and the Artificial Neural Network
Authors: Dhomad Thoalfaqqar Ali , Jaber Alaa Abdulhady
Published: March 2020

Bearings are critical components in rotating machinery. The need for easy and effective bearings fault diagnosis techniques has led to developing different monitoring approaches. In this research, however, a fault diagnosis system for bearings is developed based on the motor current signature analysis (MCSA) technique. Firstly, a test rig was built, and then different bearing faults were simulated and investigated in the test rig. Three current sensors, type SCT013, were interfaced to Arduino MEGA 2560 microcontroller and utilized together for data acquisition. The time-domain signals analysis technique was utilized to extract some characteristic features that are related to the simulated faults. It was noticed that the simulated bearing faults have led to generating vibrations in the induction motors, which in turn cause a change in its magnetic field. For classification (identification) of the extracted features, the artificial neural network (ANN) was employed. An ANN model was developed using the Matlab ANN toolbox to detect the simulated faults and give an indication about the machine health state. The obtained features from the captured motor current signals were utilized for training the ANN model. The results showed the effectiveness of using MCSA based on the time-domain signal analysis in combination with ANN in diagnosis different bearings faults.
An Analysis of Pre-service Teachers' Learning Process in Programming Learning
Authors: Kim Seong-Won , Lee Youngjun
Published: March 2020

As the importance of computing technology increases, computer science education is being actively implemented around the world. Because computer science education is being introduced into the curriculum, research on how to effectively teach programming (which is the core of automation) is actively underway. Although the importance of block-based programming languages has increased, most studies have focused on text-based programming languages. As interest in programming increases, block-based programming languages will be taught to a variety of audiences. Therefore, this study analyzed Code.org, which provides a development environment for block-based programming; this study then investigated the programming learning process of pre-service teachers, who used Code.org. Sixteen pre-service teachers participated in the study, and their learning processes were uncovered by analyzing their programming results. This suggests that pre-service teachers can learn sequential and necessary repetition without difficulty. However, the pre-service teachers failed to use the repetition block through abstraction. Besides, for While and Until, pre-service teachers did not understand the concept of repeating according to the condition. For Counter, pre-service teachers had difficulty repeating the use of variables. In the condition, pre-service teachers were not able to separate the command, which should be executed when the condition is True and when it is False. For Event, pre-service teachers had no problem utilizing the function, but they were not able to call the function with a parameter. Based on this, it was confirmed that a pre-service teacher can understand the principle of programming development in advance by understanding the abstraction, condition, and variable in the loop statement. In this study, there was a limit to practicing block-based programming language due to the platform’s low scalability. Future research should solve these problems and diversify the research subjects.