Microfilm Research Articles

Optimalisasi Pemberdayaan Kemaslahatan Ekonomi Masyarakat Desa Melalui Badan Usaha Milik Desa (BUMDes) (Studi Penelitian Terhadap UMKM Keripik Singkong di Desa Nanggerang, Kecamatan Tajurhalang, Kabupaten Bogor)

In facing the current global economic era, the government should pay special attention, especially to empowering superior Human Resources (HR). The presence of BUMDes in the form of micro, small, and medium enterprises are a medium for the community to develop their economy, and every muamalah that is carried out should be in accordance with the purpose of benefit, namely the benefit of the community's economy. This study analyzes the optimization of the empowerment of the economic benefits of rural communities through BUMDes. The methodology of this research is qualitative with a descriptive approach. This research design uses primary and secondary data. The results showed that the aspects of Hifz al-Din, Hifz al-Nasl, and Hifz al-Mal had been achieved. The aspect of Hifz al-Nafz has not been achieved and while Hifz al-'Aql has not been fully fulfilled. The advice obtained from the results of the research to the Nanggerang Village apparatus is to be able to build awareness of the community about the importance of an education even though it is non-formal education, such as training in entrepreneurial development, because by increasing the knowledge of creativity in entrepreneurship, it is universally possible to improve the community's economy much better.

The Effect of Local Application of Magnesium Oxide Powder on the Blood Parameters During Nerve Regeneration of Injured Sciatic Nerve in Rat

Peripheral nerves injuries are very common defects in animals which may lead to loss of sensory andmotor functions of the nerve. These defects are highly corrected using nanotechnology. This studyaimed to find out the effect of applying local application of magnesium Nano- and Microparticles onthe level of magnesium and rat nerve group factor in rat during the process of nerve regeneration. Thisstudy included sixty adult male apparently healthy Wistar rats had bodyweight average (M±SD: 230± 20) gram. Random division to three group was done as: Controlgroup (CG), Nanogroup (NG) andMicrogroup (MG) of (n=20) each after transecting the sciatic nerve and instant proximal and distal endof the sciatic nerve suturing. First group the (Controlgroup) which had no interferences after suturing;the second group (Nanogroup) had a local application of nanoparticles powder of MgO on sutured sitein addition to third group (Microgroup) had a local application of microparticles powder of MgO onthe sutured site. The results showed that a significant and continuous increase of rat growth factor to beseen in Nanogroup and Microgroup however, Microgroup had the highest level to the end of the study,while no significant correlation between the three groups and level of Mg during the study was seen. Itis concluded that MgO forms of Micro and Nano particles have a positive effect on nerve regenerationwhich can be determined by significant increase of NGF in Microgroup then Nanogroup but not inControlgroup. In addition to that using low dose of local application of Nano and Microparticle has nosystemic toxicity on body.

Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica

Recently, the research of innovative building materials is focused on applying supplementary materials in the form of micro- and nanopowders in cementitious composites due to the growing insistence on sustainable development. Considering above, in paper, a research on the effect of microsilica and SiO2 nanoparticles addition to cement paste, designed with Andreasen and Andersen (AA) packing density model (PDM), in terms of its physical and mechanical properties was conducted. Density, porosity, compressive strength, hardness, and modulus of indentation were investigated and compared regarding different amount of additives used in cement paste mixes. Microstructure of the obtained pastes was analyzed. The possibility of negative influence of alkali-silica reaction (ASR) on the mechanical properties of the obtained composites was analyzed. The results of the conducted investigations were discussed, and conclusions, also practical, were presented. The obtained results confirmed that the applied PDM may be an effective tool in cement paste design, when low porosity of prepared composite is required. On the other hand, the application of AA model did not bring satisfactory results of mechanical performance as expected, what was related, as shown by SEM imaging, with inhomogeneous dispersion of microsilica, and creation of agglomerates acting as reactive aggregates, what as a consequence caused ASR reaction, crack occurrence and lowered mechanical properties. Finally, the study found that the use of about 7.5% wt. of microsilica is the optimum in regards to obtain low porosity, while, to achieve improved mechanical properties, the use of 4 wt. % of microsilica seems to be optimal, in the case of tested cement pastes.

Fe-, Ni-containing ceramic-like PEO coatings on titanium and aluminum: Comparative analysis of the formation features, composition and ferromagnetic properties

Fe-, Ni-containing coatings have been formed on aluminum and titanium by the plasma electrolytic oxidation (PEO) technique in slurry electrolytes containing colloidal particles of Fe(III) and Ni(II) compounds including hydroxides. Their composition, surface morphology, and magnetic properties were studied and compared. In both cases, the concentration of iron, nickel, and substrate metal is higher, and the oxygen concentration is lower in the pores of the coatings than their average concentration over the surface. In the case of titanium, the electrolyte and substrate metals are concentrated in the pores (at. %: 38.6 Fe, 4.7 Ni, 19.5 Ti) in the form of micro- and nanosized crystallites. In the pores of the coating on aluminum, metals are concentrated in the composition of the layers lining the pores (at. %: 15.3 Fe, 50.6 Ni, 18.8 Al). The values of the coercive force and the saturation magnetization of the ferromagnetic component at 300 K for the aluminum sample (Нс = 38 Oe, M*s = 2.8 × 10−4 emu/g) are significantly lower than those for the titanium sample (Нс = 73 Oe, M*s = 7.8 × 10−3 emu/g). The discrepancy between the ferromagnetic properties of the aluminum and titanium samples correlates with the difference in the elemental composition of the pores and the presence/absence of crystallites in the pores. More pronounced ferromagnetic properties of titanium samples can be associated with the presence of crystallites in the coating pores.

Solution/Ammonolysis Syntheses of Unsupported and Silica-Supported Copper(I) Nitride Nanostructures from Oxidic Precursors.

Herein we describe an alternative strategy to achieve the preparation of nanoscale Cu3N. Copper(II) oxide/hydroxide nanopowder precursors were successfully fabricated by solution methods. Ammonolysis of the oxidic precursors can be achieved essentially pseudomorphically to produce either unsupported or supported nanoparticles of the nitride. Hence, Cu3N particles with diverse morphologies were synthesized from oxygen-containing precursors in two-step processes combining solvothermal and solid−gas ammonolysis stages. The single-phase hydroxochloride precursor, Cu2(OH)3Cl was prepared by solution-state synthesis from CuCl2·2H2O and urea, crystallising with the atacamite structure. Alternative precursors, CuO and Cu(OH)2, were obtained after subsequent treatment of Cu2(OH)3Cl with NaOH solution. Cu3N, in the form of micro- and nanorods, was the sole product formed from ammonolysis using either CuO or Cu(OH)2. Conversely, the ammonolysis of dicopper trihydroxide chloride resulted in two-phase mixtures of Cu3N and the monoamine, Cu(NH3)Cl under similar experimental conditions. Importantly, this pathway is applicable to afford composite materials by incorporating substrates or matrices that are resistant to ammoniation at relatively low temperatures (ca. 300 °C). We present preliminary evidence that Cu3N/SiO2 nanocomposites (up to ca. 5 wt.% Cu3N supported on SiO2) could be prepared from CuCl2·2H2O and urea starting materials following similar reaction steps. Evidence suggests that in this case Cu3N nanoparticles are confined within the porous SiO2 matrix.

Potential of animal leather as a strategic commodity for the livestock industry: A review

Indonesia is one of the countries rich in germplasm in the form of livestock. Livestock products can be in the form of meat, milk and eggs as well as by-products such as leather. Animal leathers are one of the by-products of livestock produced from a livestock slaughtering industry. Animal leathers have the potential as raw material for non-oil and gas export products. Until now, livestock by-product in the form of leather has been processed and utilized by many people in Indonesia. Utilization is carried out in the form of food and non-food products. The use of food and non-food products has been developed commercially by the community, both in the form of small, micro, medium and large scale industries. Animal leathers are one of the livestock by products that have the highest economic value compared to the others. This is because animal leather is one of the export products. Until now, the exported animal leathers are still in the form of non-food products, while some derivatives of leather products in the form of food products are still imported. The potential of livestock leathers as one of the strategic commodities of the livestock industry needs to be maximally developed. Improving the quality of animal leathers needs to be done in an effort to increase the source of foreign exchange.

Метод расчета усталостного повреждения регулярных зон крыла самолета при случайном нагружении на этапах типового полета

In accordance with the airworthiness standards, the aircraft structure must be operationally survivable, it means that structure must be able to remain efficiency in the presence of admissible damage. But, accumulating above than a certain level, damages cause fatigue failure of the structure, in the form of micro- and submicrocracks, thus reducing its strength characteristics. Currently, several approaches have been formed to ensure the safety of an aircraft structures in terms of strength. One of them is ensuring a safe resource (safe durability). This principle implies that during the specified service life of the product, no damage will occur in it, reducing the strength below the permissible level. The aircraft resource is limited “from above” by the durability of the regular zones of airframe. Therefore, predicting the durability of an aircraft wing structure at the design stage is a fundamental engineering problem to ensure its safety and economic efficiency. At the same time, the first step in dealing with aircraft fatigue damage at the design stage is the collection and assessment of the operational loads of the analog aircraft. However, at the design stage of a new aircraft model, obtaining such data is not always possible. Therefore, the purpose of this article is to develop a method for calculating fatigue damage at the stage of cracking and assessing the durability of regular zones of a transport aircraft wing, taking into account the conditions of its operation. The tasks to be solved are: to isolate the factors that determine the durability of the aircraft at flying in turbulent air; to take into account the asymmetry of loads and accumulated damage that occurs at each stage during the entire flight of the aircraft; to determine the aircraft's resource depending on the profile of a typical flight. The method is based on a standardized atmospheric turbulence model, typical flight profiles, fatigue characteristics of materials, the hypothesis of linear summation of damages and calculation based on nominal stresses. As result, comparison between the calculated integral repeatability of overloads and equivalent bending moments with the results of processing flight test data showed good agreements. Conclusions. The scientific novelty of the work lies in the fact that a method for calculating the fatigue damage of the regular wing zones, taking into account the expected flight profile of the aircraft was developed. This means that the proposed method makes it possible to carry out a preliminary assessment of the resource when designing an airplane without using data on the operational loads of an analogue airplane, and also estimate the residual resource of the airplane during its operation.

A 5-year assessment of the epidemiology and natural history of possible diabetes in remission

IntroductionType 2 diabetes is considered a chronic and progressive disease. The term diabetes in remission has no consensus definition and the question whether diabetes “remission” or “cure” can achieve any long-term benefits in people with type 2 diabetes remains unclear. The aim of our study was a review of our district wide diabetes population to determine the epidemiology and clinical characteristics of those who had a diagnosis of diabetes but did not meet the diagnostic criteria for diabetes at the point of assessment in 2014 and then to review their diabetes outcomes over a 5-year time frame. MethodsIn a whole population based non-interventional epidemiological study amongst 17,308 people with diabetes, we identified 991 with diet treated type 2 diabetes who met the baseline criteria for diabetes in remission (HbA1c < 48 mmol/mol (6.5%)). Over the next 5 years, 385 (39%) people had a cumulative HbA1c attainment of <48 mmol/mol (6.5%) and remained free of diabetes medication. ResultsIn this erstwhile remission group only 130 (13%) were free of any vasculopathy, whilst 255 (26%) had some form of micro or macrovascular disease, of which 64 people had been without micro or macrovascular vascular complications at baseline. Only 20 people had a HbA1c consistently ≤37 mmol/mol (5.7%) who were free of diabetes vascular complications and of diabetes medication. ConclusionsThe definition of ‘diabetes in remission’ remains unclear most especially regarding the inclusion of baseline prevalent or incident macro or microvascular disease, the durability of potential remission is poor, and the likelihood of cure is remote.

The place of small agricultural entrepreneurship in the development of amalgamated territorial communities

The place of small agricultural entrepreneurship in the development of amalgamated territorial communities

Review: Flavor encapsulation by spray drying technique

Flavors are the most are expensive valuable ingredient in the food product as they are very delicate and volatile in nature, thus to preserve them has become concern to food manufacturers. Microencapsulation is a recent technology used to pack food materials in the form of micro and nanoparticles which helps to protect sensitive food components, reduce nutritional loss and preserve flavors. Encapsulation of flavors is highly commercialized process which involves various methods such as spray drying, spray cooling, extrusion and freeze drying. Among them spray drying encapsulation technique is commonly used for food products. It depends on high retention of the core materials particularly volatiles and some amount of oil for both volatiles and non-volatiles during the processing. The properties of core and the wall materials will influence the efficiency and retention of core during spray drying process conditions. This article emphasis on spray drying microencapsulation of food oils, flavours and their encapsulation efficiency during the process.

Properties, functions and applications of commonly used lubricant additives: A review

Wear and friction results in a huge loss of energy around the world. The need to reduce the loss has prompted the scientific community to improve the performance of lubricants. The surge in the use of additive based lubricants emphasizes its importance in the modern tribology. It has drawn the attention of the researchers to develop a stable and efficient additive based lubricant. The aim of this paper is to review these additives and underline the methods to prepare a stable solution. Understanding their properties, mechanism and shortcomings is advantageous to figure out the application. In this paper the review of commonly used lubricant additives such as Titanium dioxide, Aluminium oxide, Zinc oxide, Copper and Copper oxide, Carbon nanotubes, Molybdenum disulphide, Tungsten disulphide and Diamond is provided. The base oil or lubricants are usually not effective enough. Lubricant additives in the form of micro and nanoparticles are widely used to enhance the performance of base oil. The additives are generally used to improve the tribological and thermal properties of the base oil or fluid. Heat dissipation rate, load carrying capacity, wear and friction properties of the base oil or fluid is ameliorated by the addition of these additive. Further, the paper also incorporates the recent progress in the use of these additives.

Fast and thermal neutrons attenuation through micro-sized and nano-sized CdO reinforced HDPE composites

The fast and thermal neutron attenuation properties through polymer composites based on high density polyethylene (HDPE) reinforced by micro-sized and nano-sized Cadmium Oxide (CdO) particles with weight fractions of 10% and 40% have been investigated. This study was carried out to present a new composite material based on HDPE filled with CdO in the form of micro and nano particles to be used as a promising neutron radiation shielding material. The composites were fabricated by compression molding technique and characterized by a scanning electron microscope (SEM). The composites were subjected to fast neutrons generated from 238Pu–Be neutron source with activity 12 × 109 Bq and detected by a Stilbene scintillator. The fast neutron shielding properties were determined in terms of the fast neutron transmission fractions of the composites. The neutron activation method was applied by using Indium foils and Indium foils covered with Cadmium as a detector to study the properties of the thermal and epithermal neutron fluxes of the composites upon exposure to neutron flux generated from 241Am–Be neutron source. It is clear from this study that the transmitted fractions for fast neutron in case of nano CdO/HDPE composites are less than the case of micro CdO/HDPE composites, however, the capture of thermal neutrons inside the micro CdO/HDPE composites is more probable than that in nano CdO/HDPE composites at the same weight fraction. Tensile mechanical testing has been conducted and showed that particle addition percentage and size have significant effect on the mechanical properties of composites. Nano CdO/HDPE composites showed more superior mechanical properties compared to micro CdO/HPDE composites at the same particle addition level.

Referencialidade, coesão estrutural e organização temporal em In Nomine a 3 de Brian Ferneyhough

&lt;div&gt;&lt;p class="LO-Normal"&gt;&lt;span class="Fontepargpadro"&gt;&lt;span lang="PT-BR"&gt;O estudo analítico investiga os princípios estruturantes formais, temporais e rítmicos de &lt;em&gt;In Nomine a 3 &lt;/em&gt;de Brian Ferneyhough. A análise parte da contextualização dos elementos referenciais da temática do ciclo &lt;em&gt;Umbrations &lt;/em&gt;no qual a peça está inserida. Em seguida, é realizado um estudo detalhado da macroforma baseado na segmentação formal da peça&lt;em&gt; &lt;/em&gt;e nas principais características organizacionais dos materiais correlacionados à temática. A última parte da análise dedica-se ao estudo minucioso dos aspectos temporais e rítmicos no âmbito da microforma da peça a partir das subseções e dos compassos individuais. A aproximação analítica empregada recorre a um conjunto de estratégias alternativas a fim de identificar e discutir os elementos estruturantes da peça inacessíveis por meio da análise tradicional da partitura, contextualizando-os ao pensamento composicional de Ferneyhough.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;/div&gt;

Fine-resolution mapping of microforms of a boreal bog using aerial images and waveform-recording LiDAR

Fine-resolution mapping of microforms of a boreal bog using aerial images and waveform-recording LiDAR

Toxicity of Microplastics and Nanoplastics in Mammalian Systems.

Fragmented or otherwise miniaturized plastic materials in the form of micro- or nanoplastics have been of nagging environmental concern. Perturbation of organismal physiology and behavior by micro- and nanoplastics have been widely documented for marine invertebrates. Some of these effects are also manifested by larger marine vertebrates such as fishes. More recently, possible effects of micro- and nanoplastics on mammalian gut microbiota as well as host cellular and metabolic toxicity have been reported in mouse models. Human exposure to micro- and nanoplastics occurs largely through ingestion, as these are found in food or derived from food packaging, but also in a less well-defined manner though inhalation. The pathophysiological consequences of acute and chronic micro- and nanoplastics exposure in the mammalian system, particularly humans, are yet unclear. In this review, we focus on the recent findings related to the potential toxicity and detrimental effects of micro- and nanoplastics as demonstrated in mouse models as well as human cell lines. The prevailing data suggest that micro- and nanoplastics accumulation in mammalian and human tissues would likely have negative, yet unclear long-term consequences. There is a need for cellular and systemic toxicity due to micro- and nanoplastics to be better illuminated, and the underlying mechanisms defined by further work.

Laboratory testing and numerical simulation of properties and thermal-induced cracking of Eibenstock granite at elevated temperatures

The knowledge about thermo-mechanical properties of granite is still limited to some extent. Individual measurements are necessary to obtain reliable properties for specific granite types. A reliable numerical model of thermal cracking behaviours of granite exposed to extreme high temperatures (e.g. 800–1000 °C) is missing. In this study, the impact of temperature up to 1000 °C on physical, mechanical, and thermal properties as well as thermo-mechanical coupled behaviour of Eibenstock granite was investigated by laboratory testing and numerical simulations. The physical properties including mineral composition, density, P-wave velocity, and open porosity are measured to be temperature dependent. Uniaxial compression and Brazilian tests were carried out to measure uniaxial compressive strength (UCS), Young’s modulus, stress–strain relationship, and tensile strength of Eibenstock granite before and after thermal treatment, respectively. Thermal properties including specific heat, thermal conductivity, thermal diffusivity, and linear thermal expansion coefficient are also measured and found to be temperature dependent, especially the expansion coefficient which shows a steep increase around 573 °C as well as at 870 °C. The numerical simulation code FLAC3D was used to develop a numerical scheme to simulate the thermal-induced damage of granite at high temperatures. Statistical methods combined with real mineral composition were used to characterize the heterogeneity of granite. The numerical model is featured with reliable temperature-dependent parameters obtained from laboratory tests. It can well reproduce the laboratory results in form of thermal-induced micro- and macrocracks, as well as the stress–strain behaviour and the final failure pattern of Eibenstock granite after elevated temperatures up to 1000 °C. The simulation results also reveal that the thermal-induced microcracks are randomly distributed across the whole sample. Although most thermal-induced damages are tensile failures, shear failure begins to develop quickly after 500 °C. The obvious UCS reduction in granite due to heating is mainly caused by the increase in shear failure. The simulation also shows that the dominant impact of α–β quartz transition is widening pre-existing cracks rather than the formation of new microcracks.

Participatory Mapping of Village Potential with Geotagging Data (Case Study: Wedomartani Village, Sleman, Yogyakarta)

Digital spatial data has the highest demand, especially for the needs of analysis in terms of mapping. Mapping is currently the focus of attention of many institutions because real objects in the field in a wide range can be visualized in a precision field with a specif ic scale. Many villages do not have digital spatial data; one ofthem is Wedomartani village. Therefore, an inventory of digital spatial data of important village objects needs to be done. This study aims to map the potential of village using satellite imagery data from Google Earth and Geotagging photographs and determine the zoning potential of the Land Use of Wedomartani village. The method used to map the potential of villages using satellite imagery data is the method of interpretation, then geotagging photo data obtained through surveys utilizing GPS tag technology from smartphones and the participatory role of village communities. The determination of village land-use zoning used the matching method of the potential map with validation of geotagging photo data. The results interpretation of satellite images shows that the potential in the village of Wedomartani in the form of important objects as the potential of the village is public facilities, tourism objects, theme parks, sports facilities, buildings, roads, rivers, and agriculture. The zoning results of the potential land use of the Wedomartani village consist of Trade and Service Zones in the form of micro, small and medium businesses spread along the main road as a sector of economicpotential (212.73 Ha); The Recreation Zone is in the form of Maguwoharjo Football Stadium, Jogja Bay Pirates Adventure Park Family Park, Tambak Boyo Reservoir and Gebang Temple Cultural Heritage Site as a potential tourism sector (23.48 Ha); Agricultural and Plantation Zones in the form of irrigated rice, maize and chili as potential for sustainable agriculture (661.19 Ha).

Plankton Community Structure and Its Relationship with Minerals Profiles in Minapadi Area, Talagasari Village, Kadungora Garut Regency

Minapadi is an integration of rice cultivation with fish breeding in one location. This research was conducted in the village of Talagasari, District Garut Kadungora because this area is thought to have nutrient elements in the form of specific micro and macro minerals that are good for agriculture and fisheries. Planktons are microscopic organisms that form an important link in the life of aquatic organisms. This research aimeds to analyze the quality of water, mineral composition and its effects on plankton community structure in minapadi. The research method used was purposive sampling. Plankton relationship with water quality and dissolved minerals were analyzed using a Canonical Correspondence Analysis (CCA). Sampling was done 6 times in the period May 20 - July 25, 2018. Research shows that there are 31 orders of plankton consisting of 26 orders of phytoplankton and 5 order of zooplankton. Phytoplankton diversity index and dominance over their respective research ranged from 0,5149 to 0,8797 and 0,1203 to 0,4851, while for zooplankton from 0 to 0,8 and from 0,2 to 0,1. The water quality parameters measured primarily by temperature, DO, pH, nitrates, phosphates, ammonia qualify recommended PP 82 2001, third class. There is a concentration of dissolved minerals that exceeds the normal condition nitrates, phosphates, ammonia qualify recommended PP 82 2001, third class. There is a concentration of dissolved mineral exceeds the normal condition K, S, Si, Ca, Fe, Mn, Cu, and Cl, which led to the dominance of the phylum Euglenophyta, Bacillariophyta, and arthropods.

Reproductive toxicity of manganese dioxide in forms of micro- and nanoparticles in male rats.

BackgroundManganese Dioxide (MnO) has long been used in industry, and its application has recently been increasing in the form of nanoparticle. Objective: The present study was an attempt to assess the effects of MnO nanoparticles on spermatogenesis in male rats.Materials and MethodsMicro- and nanoparticles of MnO were injected (100 mg/kg) subcutaneously to male Wistar rats (150 20 gr) once a week for a period of 4 weeks, and the vehicle group received only normal saline (each group included 8 rats). The effect of these particles on the bodyweight, number of sperms, spermatogonia, spermatocytes, diameter of seminiferous tubes, testosterone, estrogen, follicle stimulating factor, and the motility of sperms were evaluated and then compared among the control and vehicle groups as the criteria for spermatogenesis.ResultsThe results showed that a chronic injection of MnO nanoparticles caused a significant decrease in the number of sperms, spermatogonia, spermatocytes, diameter of seminiferous tubes (p 0.001) and in the motility of sperms. However, no significant difference was observed in the weight of prostate, epididymis, left testicle, estradiol (p = 0.8) and testosterone hormone (p = 0.2).ConclusionIt seems that the high oxidative power of both particles was the main reason for the disturbances in the function of the testis. It is also concluded that these particles may have a potential reproductive toxicity in adult male rats. Further studies are thus needed to determine its mechanism of action upon spermatogenesis.

Broad band opto-capacitive power line communication coupler for DC nanogrids

The restructuration of power systems from their traditional topology combined with the technological evolution in terms of power electronics and information technology has led to the recurrence of Direct Current (DC) networks in form of micro and nano as well as smart grids of which the functioning relies on communication systems. Power line communication system (PLC) being a matured and competitive technology is viewed as the backbone of future communication systems whose role will go beyond the actual power network operational purpose, towards an integration of more commercial services such as communication services for end-users. Though PLC technology has received attention from researchers, few focused on its main part namely the coupling. With new perspective applications, an emphasis should be put on economic and safety aspects of the couplers in new grids topology. Hence, this paper proposes a PLC opto-capacitive coupling method in application for DC nanogrids; that improves the safety of a transformerless capacitor coupling by providing a galvanic isolation between the line and devices under all conditions as proven through modelling and simulations using PSIM environment. The proposed coupling method also provides an economic alternative to PLC capacitive transformer coupling with the same degree of safety.