Grasshopper is one type of insect known as a plant pest that quite affects agricultural production. Grasshoppers also have benefits natural predators and maintain ecological balance. One area where no research has been carried out on grasshopper diversity Dompu Regency, West Nusa Tenggara, Indonesia. This was conducted at 4 locations in Dompu, including corn, ex-corn, intercropping, Doroncanga ...

Whereas there is an exact linear relation between the Wiener indices of kenograms and plerograms of isomeric alkanes, the respective terminal Wiener indices exhibit a completely different behavior: Correlation between terminal Wiener indices of kenograms and plerograms is absent, but other regularities can be envisaged. In this article, we analyze the basic properties of terminal Wiener indices...

Abstract This study aimed to determine the relationships between abundance of Nitellopsis obtusa, a controversial charophyte, locally red-listed in its native Eurasian range but invasive North America, and species diversity macrophyte stands dominated by N. obtusa . Three lakes different morphology, productivity catchment were surveyed range. In each lake, composition cover three -dominated det...

Abstract In this study, the diversity and structures assemblages of benthic communities present on artificial reefs (AR) immersed for 5 years were monitoring during a full year in 2020. The comparison two different sites Bernières Bay Seine Cherbourg central part English Channel brings innovative results efficiency such structures. Benthic fauna macroalgae studied; several biotic indices like S...

Eutrophication is a major problem currently impacting many surface water ecosystems. Impacts of increased nutrient concentrations on biodiversity may differ between different scales, organism groups, and trophic states. Surveys at spatial scales have suggested that taxa exhibit significant cross-taxon congruence. In our study, we examined the diversity zooplankton zoobenthos across 261 lakes in...

Metro Cebu, Philippines has a history of over 800 years urbanization, making it unique location for urban ecological studies. Urbanization can have significant impact on floral communities, but the species composition and variety cemeteries in Cebu not been reported. We calculated richness (N), abundance (n), evenness (PE), diversity (H' D) by conducting first survey (local plants alien plants)...

AN IMPORTANT class of theoretical and practical problems in communication and control is of a statistical nature. Such problems are: (i) Prediction of random signals; (ii) separation of random signals from random noise; (iii) detection of signals of known form (pulses, sinusoids) in the presence of random noise. In his pioneering work, Wiener [1]3 showed that problems (i) and (ii) lead to the s...

Abstract. In this paper Reverse Wiener index, Reverse Detour Wiener index, Reverse Circular Wiener index Reverse Harary index, Reverse Detour Harary index, Reverse Circular Harary index, Reverse Reciprocal Wiener index, Reverse Detour Reciprocal Wiener index, Reverse Circular Reciprocal Wiener index, Reverse Hyper Wiener index, Reverse, Detour Hyper Wiener index, Reverse Circular Hyper Wiener i...

the wiener index is a graph invariant that has found extensive application in chemistry. inaddition to that a generating function, which was called the wiener polynomial, who’sderivate is a q-analog of the wiener index was defined. in an article, sagan, yeh and zhang in[the wiener polynomial of a graph, int. j. quantun chem., 60 (1996), 959969] attainedwhat graph operations do to the wiener po...

This study quantitatively analyzes the effects of flooding on growth and species diversity riparian forests along Yarkant River Tarim River, Xinjiang, in northwest China, provides important information for efficient utilization water resource management arid regions. Monitoring was conducted every year from 2016 to 2019 Xiamale forest district lower reaches Shaya lunnan upper middle River. The ...