Sejarah Masuknya Suku Mandailing ke Kabupaten Rokan Hulu Tahun 1935-1945

Mandailing tribe is one of tribes located in Rokan Hulu Regency. Mandailing tribe in Rokan Hulu regency is an immigrant tribe from North Sumatera Province involved in civil war in Padang Galugur area to settle and live in Rokan Hulu District. The purpose of this research is 1) To know the history of entry of Mandailing tribe in Regency of Rokan Hulu Regency. 2) To know the factors inhibiting and pushing the entry of Mandailing tribe into Rokan Hulu District 3) To know the acceptance of local people to the entry of Mandailing tribe to Rokan Hulu regency 4) To know the role of government in the development of Mandailing tribe in Rokan Hulu regency. In this research using descriptive method, with qualitative approach, where it will provide complete information so that it is useful for science. The results of this study indicate that the Mandailing tribe is one part of the tribe that is in Rokan Hulu district. Who has long lived and lived in Rokan Hulu district from the days of the Kingdom of Rambah and Tambusai to the present time. And developed into one of the largest tribes in Rokan Hulu Distric

Kembalinya Irian Barat ke Nkri Tahun 1969

Abstrack: Historically, the area of ​​Indonesia is the territory of the former Dutch East Indies colony or territory of the former Dutch East Indies. Dutch East Indies archipelago is an area that is separated by seas. Evidence that the Dutch East Indies is fragmentary and does not constitute a single unit is used provided that the territorial sea Indies 3-mile (5.55 km). Indonesia As a nation that never colonized, has a separate area, is clearly a big loss for the people of Indonesia. The circumstances do not support our efforts to realize an independent nation, united, sovereign and towards a just and prosperous nation as stated in the preamble of the 1945 Constitution as a continuation of West Irian issue of dispute between Indonesia and th

Sejarah Berdirinya SD Negeri 01 Siak Sejak 1915 Hingga Kemerdekaan RI 1945

Education is one way for people to reach a level of progress, as a means to free itself from underdevelopment, and various social shackles that impede the achievement of the common welfare, reciprocation of a nation depends on whether or not the quality of education obtained.Dutch colonial period with regard to education is a dark history. Occupiers make education as a tool to reap profits through cheap labor. Schools were also made at low cost, in order not to burden the government coffers.Educational facilities of high quality is always maintained during the colonial period that keep children Netherlands always get a better education of the children of Indonesia because the Dutch government did not want any indigenous children who will be able to compete with the Dutch Later onset of the notion that profits acquired by the Dutch over the colonies should be paid back. The events that can be viewed as an expression of a new idea that came to be known as the Ethical Policy. Finally built a school for indigenous people, equivalent to the school for the Europeans. This study aimed to determine the background of the establishment of the State Elementary School 01 Siak, know the development of the State Elementary School 01 Siak year 1915-1945, to know what the role of the State Elementary School 01 for the community Siak.Results of research in general researchers can say that the establishment of SD Negeri 01 Siak due to the pressure exerted by the Dutch against the kingdom Siak which the school stood in 1915 during the 12th Sultan Kingdom of Sia

Pengaruh Sikap Ilmiah Siswa terhadap Hasil Belajar Materi Bangun Ruang Siswa Kelas VIII SMP Negeri 3 Minasatene

Matematika adalah pelajaran yang kurang diminati oleh siswa, dalam belajar lebih banyak siswa pasif, sehingga sikap ilmiah siswa kurang berkembang, sehingga hasil belajar siswa cenderung menurun. Sehingga guru matematika selalu berusaha mengembangkan metode pembelajaran untuk meningkatkan sikap ilmiah siswa, yang berdampak pada hasil belajar siswa. Pernyataan tersebut menarik peneliti untuk mengambil isu studi kelas VIII SMP Negeri 3 Minasatene. Populasi yang diambil adalah kelas VIII SMP Negeri 3 Minasatene, dengan sampel penelitian kelas VIIIA sebanyak 27 siswa. Teknik pengumpulan data sikap ilmiah dengan menggunakan kuesioner dan lembar observasi sedangkan hasil belajar dengan menggunakan uji. Analisis data menggunakan regresi linier sederhana. Signifikansi koefisien regresi dan model regresi kelinearan didapatkan pengaruh sikap ilmiah (X) terhadap hasil belajar (Y), menurut persamaan regresi Y = 0,0109 + 0.138X. Untuk menguji koefisien signifikansi regresi yang diperoleh t hitung 5.197 diatas tabel 2.02 maka Ho ditolak yang berarti koefisien regresi signifikan. Uji kelinearan diperoleh Fhitung 26,801 di atas Ftabel 4,08, dan signifikan 0,0

Pengaruh Sikap Ilmiah Siswa terhadap Hasil Belajar Materi Bangun Ruang Siswa Kelas VIII SMP Negeri 3 Minasatene

Matematika adalah pelajaran yang kurang diminati oleh siswa, dalam belajar lebih banyak siswa pasif, sehingga sikap ilmiah siswa kurang berkembang, sehingga hasil belajar siswa cenderung menurun. Sehingga guru matematika selalu berusaha mengembangkan metode pembelajaran untuk meningkatkan sikap ilmiah siswa, yang berdampak pada hasil belajar siswa. Pernyataan tersebut menarik peneliti untuk mengambil isu studi kelas VIII SMP Negeri 3 Minasatene. Populasi yang diambil adalah kelas VIII SMP Negeri 3 Minasatene, dengan sampel penelitian kelas VIIIA sebanyak 27 siswa. Teknik pengumpulan data sikap ilmiah dengan menggunakan kuesioner dan lembar observasi sedangkan hasil belajar dengan menggunakan uji. Analisis data menggunakan regresi linier sederhana. Signifikansi koefisien regresi dan model regresi kelinearan didapatkan pengaruh sikap ilmiah (X) terhadap hasil belajar (Y), menurut persamaan regresi Y = 0,0109 + 0.138X. Untuk menguji koefisien signifikansi regresi yang diperoleh t hitung 5.197 diatas tabel 2.02 maka Ho ditolak yang berarti koefisien regresi signifikan. Uji kelinearan diperoleh Fhitung 26,801 di atas Ftabel 4,08, dan signifikan 0,0

Quantitative Data Analysis using PLS-SEM (SmartPLS): Issues and Challenges in Ethical Consideration

In research, ethical issues are crucial, including the preservation of participants' rights, privacy, and well-being to secure informed consent and minimize potential harm. Throughout the study, researchers must maintain transparency, honesty, and integrity, promoting trust and credibility in the pursuit of knowledge. In the realm of quantitative research, the process of data analysis plays a fundamental role, serving as a critical element in the generation of reliable and precise findings. The purpose of this concept paper is to provide the growing recognition of the ethical importance of quantitative data analysis in research. This paper delves into the ethical aspects of quantitative data analysis, underscoring the necessity for researchers to approach matters related to data collection, storage, and analysis with meticulous attention when using SmartPLS. This study highlights that preserving privacy and confidentiality requires the secure handling of various data types, especially those containing personally identifiable or health information. Additionally, it is crucial to subject biases and discrimination in data analysis to rigorous examination to ensure fair representation and mitigate potential negative consequences. The current prevalence of privacy breaches and the accompanying ethical concerns underscore the critical importance of prioritizing ethical considerations. This paper also explores the ethical complexities unique to Partial Least Squares Structural Equation Modelling (PLS-SEM), a widely used statistical technique across multiple disciplines by using SmartPLS software. SmartPLS enables researchers to analyse intricate relationships, facilitating the derivation of significant conclusions. Nevertheless, researchers employing SmartPLS must remain attentive to distinct ethical dilemmas, particularly those related to the interpretation, management, and disclosure of data. The exercise of ethical vigilance becomes essential when the conclusions drawn from SmartPLS have an impact on various stakeholders, such as employees, consumers, and shareholders. Researchers can ensure the integrity, accountability, and ethicality of their research endeavours by adhering to ethical guidelines, conducting comprehensive analyses, and exercising caution when making generalizations while utilizing SmartPLS

Aerodynamic performance of flying discs

The purpose of this paper is to examine geometrical design influence of various types of flying discs on their flight performance from the aerodynamics perspective. The lift, drag and moment coefficients of the discs were measured experimentally using a wind tunnel. Three types of golf discs and four sets of simpler parametric discs were studied to analyze and isolate the effect of design factors on these aerodynamic characteristics. Full six degree-of-freedom simulations of the discs were performed to visualize their flight trajectories and attitudes. These simulations, combined with the experimental data, provide details on the well-known “S-shaped” ground-path traced by a flying disc. This study reveals two key parameters to evaluate the flight performance of a disc: its coefficient of lift-to-drag ratio (CL/CD) and, more importantly, its coefficient of pitching moment (CM). The latter influences the tendency of the disc to roll from its intended path, and the former influences its throwing distance. The work suggests that to optimize the flight performance of a disc, the magnitudes and gradient of its CM should be minimized and its trim-point shifted from origin, while its CL/CD should be maximized with a flatter peak. In this study, the design parameters and the aerodynamic characteristics of various types of flying discs are analysed, compared and discussed in depth. Recommendations of design improvements to enhance the performance of any flying disc are offered as well

Purification and characterization of cyclodextrin glucanotransferase from alkalophilic Bacillus sp. G1

A cyclodextrin glucanotransferase (CGTase) was successively purified by ammonium sulphate precipitation, and affinity chromatography on a-CD (epoxy)-Sepharose 6B column. The specific activity of the CGTase was increased approximately 2200-fold, from 8.43 U/mg protein to 18,866 U/mg protein. SDS-PAGE showed that the purified CGTase was homogeneous and the molecular weight of the purified CGTase was about 75 kDa. The molecular weight of the enzyme that was estimated by gel filtration under native condition was 79 kDa. This has indicated that Bacillus sp. G1 CGTase is a monomeric protein. The isoelectric point (pI) of the enzyme was about 8.8. Characterization of the enzyme exhibited optimum pH and temperature of 6.0 and 60 8C, respectively. The enzyme was stable from pH 7.0 to 9.0 and retained its high activity up to 60 8C. However, in the presence of 20 mM Ca2+, the purified CGTase is able to prolong its thermal stability up to 70 8C. CGTase was strongly inhibited by ZnSO4, CuSO4, CoCl2, FeSO4, FeCl3 and EDTA. Km and Vmax for the purified enzyme were 0.15 mg/ml and 60.39 mg bcyclodextrin/( ml min), respectively, with soluble starch as substrate. In cyclodextrin production, tapioca starch was found to be the best substrate used to produce CDs. The enzyme produced g- and b-CD in the ratio of 0.11:0.89 after 24 h incubation at 60 8C, without the presence of any selective agents