Super edge-magic deficiency of join-product graphs

A graph $G$ is called \textit{super edge-magic} if there exists a bijective function $f$ from $V(G) \cup E(G)$ to $\{1, 2, \ldots, |V(G) \cup E(G)|\}$ such that $f(V(G)) = \{1, 2, \ldots, |V(G)|\}$ and $f(x) + f(xy) + f(y)$ is a constant $k$ for every edge $xy$ of $G$. Furthermore, the \textit{super edge-magic deficiency} of a graph $G$ is either the minimum nonnegative integer $n$ such that $G \cup nK_1$ is super edge-magic or $+\infty$ if there exists no such integer. \emph{Join product} of two graphs is their graph union with additional edges that connect all vertices of the first graph to each vertex of the second graph. In this paper, we study the super edge-magic deficiencies of a wheel minus an edge and join products of a path, a star, and a cycle, respectively, with isolated vertices.Comment: 11 page

Role of consumer satisfaction in mediating effect of product quality on repurchase intention

The purpose of this study is to explain the effect of product quality on consumer satisfaction and repurchase intention Berrybenka.com consumers in the city of Denpasar. The sample used was Berrybenka.com consumers in the city of Denpasar with a total of 105 respondents with a sample collection technique using purposive sampling. This research uses PLS (Partial Least Square) analysis technique. The results found that the quality of the product had a significant positive effect on repurchase intentions. Product quality has a significant positive effect on customer satisfaction. Consumer satisfaction has a significant positive effect on repurchase intentions. Consumer satisfaction acts as a partial mediating variable on the effect of the relationship of product quality on repurchase intentions. The implications of this study indicate that to increase the repurchase intention of its products, Berrybenka.com should need to pay attention to the factors of product quality and customer satisfaction. To maintain and increase market share, Berrybenka.com needs to maintain the quality of its products. Good product quality will increase customer satisfaction and encourage repurchase intentions of Berrybenka.com consumers in the future

Analisis Kualitas Pelayanan terhadap Kepuasan Mahasiswa pada Fakultas Ekonomi Universitas Negeri YOGYAKARTA

Penelitian ini mengkaji kualitas layanan yang disediakan oleh FE UNY dan pengaruhnya terhadap tingkat kepuasan mahasiswa studi di FE UNY. Lebih spesifik lagi, penelitian ini bertujuan untuk mengetahui pengaruh keandalan, ketulusan, jaminan, keberwujudan dan ketanggapan terhadap kepuasan mahasiswa. Penelitian ini termasuk penelitian kausal-komparatif, yaitu penelitian untuk menguji variabel satu mempengaruhi varaibel lain. Pengumpulan data dilakukan dengan kuesioner yang dibagikan kepada para mahasiswa FE UNY dari semua program studi, baik S1 maupun D3, mahasiswa yang berkuliah di Kampus UNY Karangmalang, maupun di UNY Wates, dengan menggunakan metode proportional random sampling. Teknik analisis data dengan menggunakan regresi berganda, dengan melihat uji-t dan uji-F. Hasil penelitian ini menyimpulkan bahwa terdapat pengaruh positif dan signifikan Keandalan terhadap Kepuasan mahasiswa; terdapat pengaruh positif dan signifikan Ketulusan terdahap Kepuasan mahasiswa;t idak terdapat pengaruh Jaminan terhadap Kepuasan mahasiswa; terdapat pengaruh positif dan signifikan Keberwujudan terhadap Kepuasan mahasiswa; terdapat pengaruh positif dan signifikan Ketanggapan terhadap Kepuasan mahasiswa. Secara simultan kelima variabel berpengaruh positif dan signifikan terhadap Kepuasan mahasiswa, dengan koefisien determinasi (R2) sebesar 0,814. Artinya, kelima variabel independen mempengaruhi variabel Kepuasan mahasiswa sebesar 81,4%, sedangkan selebihnya (18,6%) dipengaruhi oleh variabel lain yang tidak diteliti dalam penelitian ini

A Novel G Protein-Coupled Receptor of Schistosoma mansoni (SmGPR-3) Is Activated by Dopamine and Is Widely Expressed in the Nervous System

Schistosomes have a well developed nervous system that coordinates virtually every activity of the parasite and therefore is considered to be a promising target for chemotherapeutic intervention. Neurotransmitter receptors, in particular those involved in neuromuscular control, are proven drug targets in other helminths but very few of these receptors have been identified in schistosomes and little is known about their roles in the biology of the worm. Here we describe a novel Schistosoma mansoni G protein-coupled receptor (named SmGPR-3) that was cloned, expressed heterologously and shown to be activated by dopamine, a well established neurotransmitter of the schistosome nervous system. SmGPR-3 belongs to a new clade of “orphan” amine-like receptors that exist in schistosomes but not the mammalian host. Further analysis of the recombinant protein showed that SmGPR-3 can also be activated by other catecholamines, including the dopamine metabolite, epinine, and it has an unusual antagonist profile when compared to mammalian receptors. Confocal immunofluorescence experiments using a specific peptide antibody showed that SmGPR-3 is abundantly expressed in the nervous system of schistosomes, particularly in the main nerve cords and the peripheral innervation of the body wall muscles. In addition, we show that dopamine, epinine and other dopaminergic agents have strong effects on the motility of larval schistosomes in culture. Together, the results suggest that SmGPR-3 is an important neuronal receptor and is probably involved in the control of motor activity in schistosomes. We have conducted a first analysis of the structure of SmGPR-3 by means of homology modeling and virtual ligand-docking simulations. This investigation has identified potentially important differences between SmGPR-3 and host dopamine receptors that could be exploited to develop new, parasite-selective anti-schistosomal drugs

Tropical forest and peatland conservation in Indonesia: Challenges and directions

1. Tropical forests and peatlands provide important ecological, climate and socio‐economic benefits from the local to the global scale. However, these ecosystems and their associated benefits are threatened by anthropogenic activities, including agricultural conversion, timber harvesting, peatland drainage and associated fire. Here, we identify key challenges, and provide potential solutions and future directions to meet forest and peatland conservation and restoration goals in Indonesia, with a particular focus on Kalimantan. 2.Through a round‐table, dual‐language workshop discussion and literature evaluation, we recognized 59 political, economic, legal, social, logistical and research challenges, for which five key underlying factors were identified. These challenges relate to the 3Rs adopted by the Indonesian Peatland Restoration Agency (Rewetting, Revegetation and Revitalization), plus a fourth R that we suggest is essential to incorporate into (peatland) conservation planning: Reducing Fires. 3.Our analysis suggests that (a) all challenges have potential for impact on activities under all 4Rs, and many are inter‐dependent and mutually reinforcing, implying that narrowly focused solutions are likely to carry a higher risk of failure; (b) addressing challenges relating to Rewetting and Reducing Fire is critical for achieving goals in all 4Rs, as is considering the local socio‐political situation and acquiring local government and community support; and (c) the suite of challenges faced, and thus conservation interventions required to address these, will be unique to each project, depending on its goals and prevailing local environmental, social and political conditions. 4.With this in mind, we propose an eight‐step adaptive management framework, which could support projects in both Indonesia and other tropical areas to identify and overcome their specific conservation and restoration challenges.Biotechnology and Biosciences Research Council; Borneo Nature Foundatio

Tropical forest and peatland conservation in Indonesia: Challenges and directions

Tropical forests and peatlands provide important ecological, climate and socio‐economic benefits from the local to the global scale. However, these ecosystems and their associated benefits are threatened by anthropogenic activities, including agricultural conversion, timber harvesting, peatland drainage and associated fire. Here, we identify key challenges, and provide potential solutions and future directions to meet forest and peatland conservation and restoration goals in Indonesia, with a particular focus on Kalimantan. Through a round‐table, dual‐language workshop discussion and literature evaluation, we recognized 59 political, economic, legal, social, logistical and research challenges, for which five key underlying factors were identified. These challenges relate to the 3Rs adopted by the Indonesian Peatland Restoration Agency (Rewetting, Revegetation and Revitalization), plus a fourth R that we suggest is essential to incorporate into (peatland) conservation planning: Reducing Fires. Our analysis suggests that (a) all challenges have potential for impact on activities under all 4Rs, and many are inter‐dependent and mutually reinforcing, implying that narrowly focused solutions are likely to carry a higher risk of failure; (b) addressing challenges relating to Rewetting and Reducing Fire is critical for achieving goals in all 4Rs, as is considering the local socio‐political situation and acquiring local government and community support; and (c) the suite of challenges faced, and thus conservation interventions required to address these, will be unique to each project, depending on its goals and prevailing local environmental, social and political conditions. With this in mind, we propose an eight‐step adaptive management framework, which could support projects in both Indonesia and other tropical areas to identify and overcome their specific conservation and restoration challenges