Ratio Estimators in Simple Random Sampling Using Information on Auxiliary Attribute

Some ratio estimators for estimating the population mean of the variable under study, which make use of information regarding the population proportion possessing certain attribute, are proposed. Under simple random sampling without replacement (SRSWOR) scheme, the expressions of bias and mean-squared error (MSE) up to the first order of approximation are derived. The results obtained have been illustrated numerically by taking some empirical population considered in the literature.Comment: 7 page

HUBUNGAN KEAKTIFAN SENAM DENGAN KUALITAS HIDUP LANSIA HIPERTENSI DI PUSKESMAS KASIHAN II KABUPATEN BANTUL YOGYAKARTA

Latar Belakang: Masalah kesehatan yang dihadapi lansia berhubungan dengan kemampuan gerak tubuh, degenerasi organ tubuh dan penurunan daya tahan tubuh lansia. Salah satu dampak dari penurunan fungsi organ tubuh diantaranya terjadinya labilitas tekanan darah. Dimana sekitar 60% lansia setelah berusia 65 tahun akan mengalami peningkatan tekananan darah atau hipertensi. kualitas hiup individu yang menderita hipertensi lebih buruk jika dibandingkan dengan dengan individu yang memiliki tekanan darah normal. Tujuan Penelitian: Mengetahui hubungan keaktifan senam dan kualitas hidup lansia hipertensi di Puskesmas Kasihan II Kabupaten Bantul Yogyakarta Metode Penelitian: Jenis penelitian ini adalah penelitian non-eksperimental yang bersifat kuantitatif dengan menggunakan rancangan cross sectional. Pengambilan sampel menggunakan teknik total sampling yang berjumlah 88 lansia. data diambil dengan menggunakan kuesioner kemudian dianalisis menggunakan uji Chi Square. Hasil Penelitian: Sebagian besar responden berjenis kelamin perempuan 30 responden (60,0%) , sebagian besar berumur 60-70 tahun (72,0%), frekuensi keaktifan senam dalam kategori aktif 26 responden (52,0%) dan kualitas hidup lansia hipertensi dalam kategori baik 32 responden (64,0%,) nilai p=0,000 (p>0,05). Kesimpulan: Terdapat hubungan yang signifikan antara keaktifan senam dengan kualitas hidup lansia hipertensi di Puskesmas Kasihan II Kabupaten Bantul Yogyakarta. Kata Kunci: Lansia, Hipertensi, Kualitas Hidu

Implementing Pursuit of Prey Strategies in Autonomous Robots: A Systematic Reconstruction of Behavior as Found in Tiger Beetles

Vision is a key factor in detecting and pursuing prey in many animals, yet it can be constrained both by intrinsic limitations and the complexity of the visual environment. For example, tiger beetles are visual predators that frequently stop during prey pursuits, possibly because the limitations of their visual systems cause them to lose sight of their target when advancing towards it at high speeds. This problem may be compounded as the visual environment becomes more complex. To test these hypotheses, we used simulations with a video system to model pursuit strategies used by the beetle. We matched the properties of the robot video system to those of the tiger beetle visual system, and challenged it to pursue visual targets in a behavioral arena. Simulated robots successfully chased prey, producing pursuit trajectories different to those made by the beetles. In addition to furthering our understanding of biological vision, these experiments may suggest design principles for autonomous robots that may be required to navigate through unknown environments

Nature Relation Between Climatic Variables and Cotton Production

This study investigated the effect of climatic variables on flower and boll production and retention in cotton (Gossypium barbadense). Also, this study investigated the relationship between climatic factors and production of flowers and bolls obtained during the development periods of the flowering and boll stage, and to determine the most representative period corresponding to the overall crop pattern. Evaporation, sunshine duration, relative humidity, surface soil temperature at 1800 h, and maximum air temperature, are the important climatic factors that significantly affect flower and boll production. The least important variables were found to be surface soil temperature at 0600 h and minimum temperature. There was a negative correlation between flower and boll production and either evaporation or sunshine duration, while that correlation with minimum relative humidity was positive. Higher minimum relative humidity, short period of sunshine duration, and low temperatures enhanced flower and boll formation