The electrical structure of the power grid is utilized to address the phasor measurement unit (PMU) placement problem. First, we derive the connectivity matrix of the network using the resistance distance metric and employ it in the linear program formulation to obtain the optimal number of PMUs, for complete network observability without zero injection measurements. This approach was developed...

Pandemi covid 19 telah merubah pola kehidupan masyarakat di dunia termasuk Indonesia. Adanya pandemi memaksa pemerintah mengeluarkan kebijakan pembatasan sosial dan membatasi kegaiatan yang melibatkan banyak orang. Pembatasan ini juga berdampak pada pendidikan, dimana sekolah harus melaksanakan pembelajaran jarak jauh (PJJ). Ketidaksiapan siswa orang tua dengan perubahan metode sering menimbulk...

Shotgun injuries from a short distance (<3 m) may cause massive bleeding and tissue destruction. Only immediate aggressive (surgical) therapy prevents lethal outcome. We report about a 27-year-old patient, who was wounded on the left chest wall by a straight-cut shotgun from a short distance. In cases of this special traumatic pattern damage control measures are necessary. The measures should t...

We develop a conceptual framework for valuing biodiversity from an economic perspective. We argue for a dynamic economic welfare measure of biodiversity that complements the literature on beneŽ t-cost approaches and genetic distance/phylogenic tree approaches. Using a uniŽ ed model of optimal economic management of an ecosystem under ecological and genetic constraints, we identify gains from ma...

—This research describes the method of combining traditional authentication (password and username) with biometric technology, specifically fingerprint authentication. This authentication model is applied in distance education where courses are developed in learning management systems. It introduces the features of distance education as well as the biometric sensor operation. It describes the c...

This paper proposes an action research model as basis for the management of change in continuing professional distance education (CPDE). The model proposed emerged from the need to manage a complex change process from traditional paper-based distance education to e-learning. In order to illustrate and support the model proposed, this paper describes and discusses such a change process in a CPDE...

edge distance-balanced graphs are graphs in which for every edge $e = uv$ the number of edges closer to vertex $u$ than to vertex $v$ is equal to the number of edges closer to $v$ than to $u$. in this paper, we study this property under some graph operations.