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

Is Jacobson v. Massachusetts Viable After a Century of Dormancy? A Review in the Face of COVID-19

The COVID-19 pandemic has stretched us into the vast unknowns, emotionally, logically, politically, and legally. Relying on their police power, governments inched into the darkness of the powers’ fullest extent, leaving many to wonder whether the exercise of this power was constitutional. This Article examines the extent of the police power that both the federal and state governments have, and how Jacobson v. Massachusetts1 was the “silver bullet” for governments across the United States. Further, this Article provides an overview of police power, and the status of COVID-19 mandates. This Article additionally examines quarantine case law and provides an analysis of Jacobson. Finally, this Article discusses Jacobson’s efficacy and future. While the rationale of Jacobson has in some instances been limited, its reasoning has in other ways been expanded, as seen in its application with respect to rationalizing COVID-19 mandates in the interest of protecting the public’s welfare

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