The Design of Multifunctional Emergency Light System

Kondisi listrik di Aceh sangat sering terjadi pemadaman secara tidak teratur. Hal ini mengakibatkan kerugian terhadap dunia industri dan rumah tangga. Kondisi mengakibatkan masyarakat perlu mencari penerangan alternatif seperti lampu emergensi dan sistem penyimpanan energi yang baik. Lampu emergensi yang dijual di pasar umumnya mempunyai jenis lampu yang khusus untuk lampu emergensi dan tidak dapat digunakan untuk keperluan lainnya. Tujuan dari penelitian ini adalah merancang lampu perangkat lampu emergensi otomatis yang sekaligus dapat digunakan sebagai penyimpan energi sehingga dapat digunakan untuk fungsi-fungsi yang lain. Untuk keperluan tersebut penulis menggunakan rangkaian untuk mengisi ulang baterai, rangkaian detektor cahaya sebagai pembeda terang dan gelap yang dihubungkan dengan relay dan inverter untuk mengubahkan arus DC ke AC. Perangkat lampu emergensi telah berhasil dirancang dan diujicoba untuk kasus gelap (malam hari) dan terang (siang hari). Perangkat lampu emergensi ini dapat juga digunakan sebagai power supply dengan menghubungkan piranti elektronik ke saklar yang disediakan pada box lampu emergensi. The electrical power in the Aceh is often blacked-out irregularly because of several unknown reasons. The lack of the electrical power causes problems to industry and household. Therefore people should look for alternative ways for house lightning and electrical power saving. The objective of this project is to design automatic emergency light that could also be used as the source of the electrical power for other needs. For this purposes we designed the battery recharge, light sensor, and inverter electronic circuits integrated into the emergency light system. We have designed the multifunctional emergency light system which works well. In dark condition representing the electrical power blacked-out, the emergency light is on. Ones could also use this emergency light system as a power supply since the emergency light box also provides electrical plugs

Using Digital Traces for User Profiling: the Uncertainty of Identity Toolset

People manage a spectrum of identities in cyber domains. Profiling individuals and assigning them to distinct groups or classes have potential applications in targeted services, online fraud detection, extensive social sorting, and cyber-security. This paper presents the Uncertainty of Identity Toolset, a framework for the identification and profiling of users from their social media accounts and e-mail addresses. More specifically, in this paper we discuss the design and implementation of two tools of the framework. The Twitter Geographic Profiler tool builds a map of the ethno-cultural communities of a person's friends on Twitter social media service. The E-mail Address Profiler tool identifies the probable identities of individuals from their e-mail addresses and maps their geographical distribution across the UK. To this end, this paper presents a framework for profiling the digital traces of individuals

The selection of rain gauges and rainfall parameters in estimating intensity-duration thresholds for landslide occurrence: Case study from Wayanad (India)

© 2020 by the authors. Recurring landslides in theWestern Ghats have become an important concern for authorities, considering the recent disasters that occurred during the 2018 and 2019 monsoons. Wayanad is one of the highly affected districts in Kerala State (India), where landslides have become a threat to lives and properties. Rainfall is the major factor which triggers landslides in this region, and hence, an early warning system could be developed based on empirical rainfall thresholds considering the relationship between rainfall events and their potential to initiate landslides. As an initial step in achieving this goal, a detailed study was conducted to develop a regional scale rainfall threshold for the area using intensity and duration conditions, using the landslides that occurred during the years from 2010 to 2018. Detailed analyses were conducted in order to select the most effective method for choosing a reference rain gauge and rainfall event associated with the occurrence of landslides. The study ponders the effect of the selection of rainfall parameters for this data-sparse region by considering four different approaches. First, a regional scale threshold was defined using the nearest rain gauge. The second approach was achieved by selecting the most extreme rainfall event recorded in the area, irrespective of the location of landslide and rain gauge. Third, the classical definition of intensity was modified from average intensity to peak daily intensity measured by the nearest rain gauge. In the last approach, four different local scale thresholds were defined, exploring the possibility of developing a threshold for a uniform meteo-hydro-geological condition instead of merging the data and developing a regional scale threshold. All developed thresholds were then validated and empirically compared to find the best suited approach for the study area. From the analysis, it was observed that the approach selecting the rain gauge based on the most extreme rainfall parameters performed better than the other approaches. The results are useful in understanding the sensitivity of Intensity-Duration threshold models to some boundary conditions such as rain gauge selection, the intensity definition and the strategy of subdividing the area into independent alert zones. The results were discussed with perspective on a future application in a regional scale Landslide Early Warning System (LEWS) and on further improvements needed for this objective

Evaluation of the effect of six different paint cross section preparation methods on the performances of Fourier Transformed Infrared microscopy in attenuated total reflection mode

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Starvasi Nitrogen Dan Pengaruhnya Terhadap Biomassa Dan Protein Total Nannochloropsis SP. (Nitrogen Starvation Effect on Biomass and Crude Protein of Nannochloropsis SP)

Pengurangan nitrogen anorganik sebagai nutrien pada media kultur merupakan salahsatu metode untuk mempersingkat fase eksponensial pada kultur mikroalgae.Pengurangan nitrat anorganik pada media kultur Nannochloropsis sp hingga 50%dari konsentrasi normal pada media kultur Conwy ternyata mampu menurunkankepadatan rata-rata (sel/ml) hingga 15,16 % dan menurunkan pula kandungan proteintotal 13,93 %. Fenomena tersebut mengindikasikan bahwa pengurangan nitrogenanorganik pada media kultur berdampak negatif pada kepadatan (sel/ml) dankandungan protein total namun mampu mereduksi waktu kultur pada faseeksponensial mikroalgae Nannochloropsis sp

Hydrothermal depolymerization of biorefinery lignin-rich streams: Influence of reaction conditions and catalytic additives on the organic monomers yields in biocrude and aqueous phase

Hydrothermal depolymerization of lignin-rich streams (LRS) from lignocellulosic ethanol was successfully carried out in a lab-scale batch reactors unit. A partial depolymerization into oligomers and monomers was achieved using subcritical water as reaction medium. The influence of temperature (300–350–370 °C) and time (5–10 minutes) was investigated to identify the optimal condition on the monomers yields in the lighter biocrude (BC1) and aqueous phase (AP) fractions, focusing on specific phenolic classes as well as carboxylic acids and alcohols. The effect of base catalyzed reactions (2–4 wt. % of KOH) was compared to the control tests as well as to acid-catalyzed reactions obtained with a biphasic medium of supercritical carbon dioxide (sCO2) and subcritical water. KOH addition resulted in enhanced overall depolymerization without showing a strong influence on the phenolic generation, whereas sCO2 demonstrated higher phenolic selectivity even though no effect was observed on the overall products mass yields. In conclusion, a comparison between two different biocrude collection procedures was carried out in order to understand how the selected chemical extraction mode influences the distribution of compounds between BC1 and AP