27 research outputs found
Identification of High Leverage Points in Multiple Linear Regression / Noor Azima Ismail... [et al.]
No full textOutliers with respect to the predictor variables are called high leverage points. The observations that are slightly different from all others can drive to a large difference in the results of regression analysis. In regression analysis, the detection of high leverage points is compulsory, as they will give large impact on the estimation values as well as lead to multicollinearity problems. In this situation, robust regression procedure can be very useful to deal with problems arise due to the existence of high leverage points. The aim of this study is to compare the performance of three methods in detecting high leverage points. At first stage, the two well-known data sets are considered. The first data used is artificial data set generated by Hawkins, Bradu and Kass in 1984 and the second data used is stack loss data by Brownlee in 1965. The second stage of this study is to conduct simulation study whereby the data were generated based on clean and contaminated data. The three sets of measures being considered in this study are Leverage methods Ttwice-the-mean-rule), Generalized Potentials and Diagnostic Robust Generalized Approach (DRGP). The result indicates that DRGP successfully proved its ability as a powerful method of detecting high leverage points as compared to the other two methods using both artificial data sets and simulated data
A study on effectiveness in learning sampling design through interactive slides among students’ in UiTM Machang / Nor Azima Ismail ...[et al.]
No full textResearch is conducted to infer or generalize research objectives from a sample to a larger population. Statistical methods is used in order to accomplish the process of inference, where a sample
is selected as an unbiased representative from the population. The result for research (reading subject) performance were the lowest reading rates (78.4%) compared to other Southeast Asian neighbors. This is due to the weakness of teaching and learning (P&P) techniques. Mind mapping techniques were used to overcome the weakness. This research focuses on using interactive slides as a tool to help in drawing the student’s interest. Therefore, Sampling Design topic was used as the content of interactive slides. Two groups were used in this research. The result for the group that used interactive
slides were positive result (93%) as compared to group that were not using interactive slides (7%). Overall, all the students agreed that the slides arrangements are clear, organized and easy to
understand. More than 50% of the students agreed that the slides help them to increase their interest on the subject. As a conclusion, all students were satisfied and strongly satisfied with the interactive slides provided in the teaching and learning (P&P) proces
Aktualisasi Revolusi Mental dalam Pengelolaan Dana Desa (Analisis Tafsir Ekonomi Q.S.Yusuf [12]: 55)
No full textDana Desa are one of the most effective policies in village development with the completion of various kinds of infrastructure in the village. On the other hand, this policy caused side effects in the form of criminal acts of corruption against these funds. Through the interpretation of Q.S. Yusuf verse 55, the author offers the actualization of the spirit of mental revolution in the management of village funds through measures to strengthen integrity, increase professionalism, innovation, responsibility, and broaden horizons. Through these steps, the village fund policy can be implemented completely and right on target
UJI AKTIVITAS BIOLOGI DARI EKSTRAK DIKLOROMETANA BUAH CABE JAWA (Piper retrofractum) ASAL JAWA BARAT DAN ANALISIS METABOLIT SEKUNDERNYA
No full textCabe Jawa (Piper retrofractum) merupakan salah satu tanaman yang biasa dijadikan sebagai bahan baku obat di Indonesia dan termasuk kedalam genus Piper dari family Piperaceae. Tanaman ini sering dipergunakan oleh masyarakat antara lain untuk mengobati asma, wasir, masuk angin, sesak nafas, radang mulut, dan juga dipercaya bisa meningkatkan stamina. Berkaitan dengan banyaknya manfaat dari tanaman Cabe Jawa, maka pada penelitian ini dilaporkan mengenai uji potensi aktivitas biologi yang meliputi uji antioksidan dan antibakteri, serta analisis komponen metabolit sekunder dari ekstrak diklorometana buah Cabe Jawa. Uji aktivitas antioksidan ditentukan dengan menggunakan metode DPPH, sementara uji aktivitas antibakteri dilakukan menggunakan metode difusi agar dengan bakteri uji Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, dan Streptococcus mutans, sedangkan analisis metabolit sekunder dimulai dari proses ekstraksi dengan pelarut diklorometana yang dilanjutkan dengan proses pemisahan senyawa murni menggunakan berbagai teknik kromatografi antara lain Kromatografi Lapis Tipis (KLT), Kromatografi Vakum Cair (KVC), dan Kromatografi Lapis Tipis Preparatif (KLTP). Hasil uji aktivitas antioksidan dari ekstrak diklorometana buah cabe jawa memperlihatkan bahwa ekstrak tanaman ini memiliki aktivitas antioksidan dengan nilai IC50 1063,5 ppm. Sementara itu hasil uji aktivitas antibakteri terhadap beberapa bakteri uji menunjukkan bahwa ekstrak diklorometana buah Cabe Jawa memberikan hasil yang positif (mampu menghambat pertumbuhan bakteri) terhadap bakteri Staphylococcus aureus, dan Streptococcus mutans, sedangkan terhadap bakteri yang lain hasilnya negatif. Analisis metabolit sekunder terhadap ekstrak tanaman ini menunjukkan bahwa ekstrak tersebut mengandung tujuh komponen dengan nilai Rf masing masing sebesar 0,40; 0,50; 0,57; 0,65; 0,72; 0,80; dan 0,90 pada eluen heksana:etil asetat 7:3. Pemisahan lebih lanjut pada ekstrak ini menghasilkan satu buah senyawa murni yaitu senyawa metil piperat.
Cabe Jawa (Piper retrofractum) is one of the most commonly medicinal plants used in Indonesia and belongs to the genus Piper of the Piperaceae family. This plant is often used by the community to treat asthma, hemorrhoids, colds, shortness of breath, inflammation of the mouth, and also believed to increase stamina. Related to the many benefits of Cabe Jawa, this research will be reported of the potential biological activity analysis which includes antioxidant, antibacterial, and analysis of secondary metabolite component from dichloromethane extract of Cabe Jawa fruit. The antioxidant activity analysis was determined using DPPH method, while the antibacterial activity analysis was performed using agar diffusion method with Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus mutans bacteria test. Secondary metabolite analysis was started from extracting process with dichloromethane solvent followed by pure compounds separation process using various chromatographic techniques such as Thin Layer Chromatography (TLC), Liquid Vacuum Chromatography (LVC), and Preparative Thin Layer Chromatography (PTLC). The result of antioxidant activity analysis from dichloromethane extract of Cabe Jawa showed that this plant extract have antioxidant activity with IC50 value 1063,5 ppm. Meanwhile, the results of antibacterial activity analysis on several bacteria test showed that the dichloromethane extract of Cabe Jawa gave positive result (able to inhibit bacterial growth) against Staphylococcus aureus and Streptococcus mutans bacteria, while against other bacteria the result was negative. The secondary metabolite analysis of this plant extract showed that the extract contained seven components with Rf value respectively of 0,40; 0,50; 0,57; 0,65; 0,72; 0,80; and 0,90 in hexane:ethyl acetate 7:3 eluent. Further separation of this extract yields one pure compound of the methyl piperate
TERORISME DALAM FILM BULAN TERBELAH DI LANGIT AMERIKA
No full textTerorisme diartikan sebagai paham yang gemar melakukan intimidasi, aksi kekerasan, serta berbagai kebrutalan terhadap masyarakat sipil berdasarkan latar belakang, karena sebab dan motif tertentu. Pada awalnya, terorisme hanya berupa kejahatan murni seperti pembunuhan dan ancaman yang bertujuan untuk mencapai tujuan tertentu. Perkembangnya bermula dalam bentuk fanatisme aliran kepercayaan yang kemudian berubah menjadi pembunuhan, baik yang dilakukan secara perorangan maupun oleh suatu kelompok terhadap penguasa yang dianggap sebagai tiran. Pembunuhan terhadap individu ini sudah dapat dikatakan sebagai bentuk murni dari terorisme.
Metode yang dipakai dalam penelitian ini adalah Metode Analisis Semiotik (MAS) Christian Metz, atau semiotika sinematografi .Bahasa struktur film kemudian dibagi menjadi delapan pengelompokan, yang termaktub dalam ”The Large Syntagmatic Category” : Autonomous Shot, Paralel Syntagma, Bracket Syntagma, Descriptive Syntagma, Alternate Syntagma, Scene, Episodic Sequence dan Ordinary Sequence.Teori yang penulis gunakan adalah Sigmund Freud – Psikoanalisis, dimana teori ini untuk melihat bagaimana representasi dari karakter yang dibentuk dari hasil tabarakan montage , dan Sergei Eisenstein – Teori Montage, adalah teori yang digunakan untuk memunculkan serta menimbulkan emosi kepada audience.
Hasil dari penelitian ini ( 1 ) Teror, direpresentasikan berupa penekanan akan Super Ego pada karakter( 2 ) Intimidasi, direpresentasikan melalui media – media menyorot karakter Sarah dan Azima, sehingga menciptakan trauma psikologis kepada mereka, terlihat kekerasan simbolik yang terlihat dari narasi (verbal) dan bahasa tubuh (non verbal), ( 3 ) Pengakuan Bangsa Barat, direpresentasikan melalui karakter Philipus Brown dan bentuk dorongan Id nya yang akhirnya membuat keseluruhan karakte
Depression among children at shelter care institutions in Terengganu Malaysia
No full textBackground: Depression is a state of psychological disease that occurs to someone divers in age due to certain reasons. Among the factors include lack of self-confidence, problematic family, stress, low self-esteem and social environment. It could lead to a mental disorder that endangers the mental health. Aim: To investigate the status of children depression using the Children Depression Inventory (CDI) at 21 shelter care institutions in Terengganu Malaysia. Methodology: Quantitative research design was used. The sample consists of 404 respondents from 21 Islamic shelter cares such as Tahfiz, Madrasah and Orphanage in Terengganu Malaysia from the age of 10 to 18 years. Data was analyzed using Exploratory Factor Analysis (EFA), Confirmatory Factor Analysis (CFA) and Discriminant Analysis (DA) which then computed to identify the most dominant factors whereas reducing the initial five parameters with recommended >0.50 of factor loading. Results: Forward stepwise of DA shows the total of groups validation percentage by 92.08% (17 independent). The result showed that the highest frequency of respondent index was at a moderate level (62.87% respondents). This showed that children still can be controlled and cared to reduce depression
LABORATORY EVALUATION OF FOUR COMMERCIAL REPELLENTS AGAINST LARVAL LEPTOTROMBIDIUM DELIENSE (ACARI: TROMBICULIDAE)
No full textAbstract. Four commercial repellents were evaluated in the laboratory against Leptotrombidium deliense chiggers. Both in vitro and in vivo methods were used to determine repellency of the compounds. The repellents were Kellis ® (containing citronella oil, jojoba oil and tea tree oil), Kaps ® (containing citronella oil), BioZ ® (containing citronella oil, geranium oil and lemon grass oil) and Off ® (containing DEET). The combination of three active ingredients: citronella oil, geranium oil, lemon grass oil gave the highest repellency (87%) followed by DEET (84%). In vitro repellencies ranged from 73% to 87%. There was no significant difference between the four products. All the repellents had 100% in vivo repellency compared to 41-57% for the controls
Depression among children at shelter care institutions in Terengganu Malaysia
No full textBackground: Depression is a state of psychological disease that occurs to someone divers in age due to certain reasons. Among the factors include lack of self-confidence, problematic family, stress, low self-esteem and social environment. It could lead to a mental disorder that endangers the mental health. Aim: To investigate the status of children's depression using the Children Depression Inventory (CDI) at 21 shelter care institutions in Terengganu Malaysia. Methodology: A quantitative research design was used. The sample consists of 404 respondents from 21 Islamic shelter cares such as Tahfiz, Madrasah and Orphanage in Terengganu Malaysia from the age of 10 to 18 years. Data was analyzed using Exploratory Factor Analysis (EFA), Confirmatory Factor Analysis (CFA) and Discriminant Analysis (DA) which were then computed to identify the most dominant factors whereas reducing the initial five parameters with recommended >0.50 of factor loading. Results: Forward stepwise of DA shows the total of groups validation percentage by 92.08% (17 independent). The result showed that the highest frequency of respondent index was at a moderate level (62.87% of respondents). This showed that children still can be controlled and cared to reduce depression.
Keywords: Children, depression, Shelter Car
Differences between pearson’s product moment correlation coefficient and an absolute value correlation coefficient in the presence of outliers / Norafefah Mohamad Sobri ...[et al]
No full textThe correlation coefficient is one of the most commonly used statistical measures in all branches of statistics. The empirical evidence shows that this correlation coefficient is sufficiently non-robust against outliers. The aimof this study is to compare the performance of the estimator of correlation coefficient. In this study, Pilot-plant data was considered at first stage. Second stage of this study, the simulation data were generated based on normal and uniform distributionat its four contaminated form. The methods of analysis used in this study were Pearson’s correlation coefficient and An Absolute Value correlation coefficient. It can be conclude that an Absolute Value correlation coefficient performs well and more robustcompared to Pearson’s correlation coefficient in existence of outliers. Then we investigated the bias, standard error (SE) and root mean square error (RMSE) to judge their performance. The result shows that an Absolute Value performs better than Pearson’s correlation coefficient. In general An Absolute Value correlation coefficient appears to be a good estimator because it has the lowest values of bias, standard error and RMS
