Judul: Preferensi dan Kepedulian Konsumen terhadap Keamanan Pangan dalam Membeli Daging Ayam di Sungai Petani, Malaysia
Abstrak: The issue of foodborne disease is increasing in Malaysia nowadays. Malaysia is a developing country and all Malaysians have the right to learn about food safety knowledges in primary school, secondary school, even in the university level. Therefore, Malaysians should be more aware about these knowledges and fully implement in their daily life, especially in the meat quality evaluation. However, the food contamination cases increased rapidly among local citizens. Particularly, in the city of Sungai Petani, a massive food poisoning incident happen before which is related to consumption of chicken meat in a wedding celebration. In total, 65 of wedding participants are admitted to hospital for treatment, while 3 people died from food poisoning. This situation is contributed by Salmonella sp. in chicken meats that served the wedding participants. From this incident, it motivates me to start a survey regarding food safety and behavior of purchasing chicken meats in this city. Hence, I collected 126 samples from three locations in Sungai Petani, which are Taman Ria Jaya morning market, Taman Ria Jaya night market, Tesco (Utara) supermarket with Google form. Besides, online survey had been conducted by using WhatsApp. Before survey, respondents will be informed about purposes of this study, confidentiality of the data provided, topic concerned and approximate duration required for interview. All results obtained from survey are analyzed with IBM SPSS and Microsoft Excel. It can reflect an overall condition of food safety and hygiene knowledge among citizens and identify whether chicken stalls involved are willing to follow the management system from HACCP. The results from SPSS analysis show that education of respondents in Sungai Petani City, Malaysia had significant relationship (P<0,05) with the knowledge on food safety and awareness, while the occupation of respondents had significant relationship (P<0,05) with the choices of chicken meat in their daily life. Majority of respondents (59,5%) preferred to buy instantly-killed chicken meat and approximately 63,5% of them considered price, halal, size of meat and safety factors while buying chicken meat. Most of the chicken meat consumers (73%) from survey look forward to have improvement and transformation of chicken stalls from wet markets and supermarkets to fulfil food safety requirements in future. Increase of knowledge and awareness of consumers and meat handlers should be taken into account in order to improve the food safety and promote public health.
Keyword: chicken meat, food safety, hygiene, food poisoning, morning market, night market, supermarket

Judul: Studi Knowledge, Attitude, and Practice (KAP) Higiene dan Sanitasi Pedagang Daging Ayam di Pasar Tradisional di Provinsi DKI Jakarta
Abstrak: Chicken meat as a source of animal protein is very popular and common in Indonesia, including in Jakarta. Chicken meat is easy to find and its price is relatively cheaper than beef meat. Traditional markets are the most common place for Indonesian people to buy their needs, especially food. One of factors affecting the safety and quality of fresh chicken meat is application of hygiene and sanitation in markets. The aims of this study were to observe the knowledge, attitude, and practices of chicken meat vendors and to evaluate the level of hygiene and sanitation of chicken carcass at vendors in traditional markets in the Province of DKI Jakarta and correlated to each variables. This study was conducted by cross-sectional using questionnaires for interview respondents and observation on practices of hygiene and sanitation. The respondents were chicken meat vendors who traded in the traditional market in five districts in the Province of DKI Jakarta. Total of 217 respondents was involved in this study. The study used cluster random sampling method for identification the market and identification of sample cluster was done using probability proportional to size method. The data were analyzed descriptively and the association among variables was determined with gamma tests. Most of respondents (n=209; 96.3%) had knowledge categorized from moderate to good. There was no respondents whose attitude were categorized as bad, they were categorized in attitude as moderate (n=72; 33.2%) and good (n=145; 66.8%). Most of respondents (n=174; 80.2%) was categorized as moderate in practices of hygiene and sanitation. Further analysis showed that the educational levels were significantly correlated with knowledge (p<0.05), experiences were significantly correlated with the knowledge, and age was significantly correlated with the attitudes (p<0.05). The significant associations (p<0.05) were also showed between knowledge and attitude and then attitude and practice.
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Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix