Lock Picking in the Era of Internet of Things

Smart locks are a recent development in the Internet of Things that aim to modernise traditional keybased padlock systems. They allow users to operate the lock with their smartphone instead of carrying around a physical key. Typically, smart locks have a cloud system for sharing access with other people, which makes them ideal for schemes such as communal lockers or bike sharing. One of the smart locks available on the market is that produced by Master Lock. They are an established brand, and unlike many of the single product companies that have provided insecure offerings, Master Lock have so far shown that their locks are reasonably secure and resistant to known attacks such as shimming, fuzzing, and replay attacks. This paper provides a security analysis of the Master Lock Bluetooth padlock. More importantly, it reveals that there were several security vulnerabilities, including a serious one in the Application Programming Interface used by Master Lock to provide a crucial feature for managing access. We carried out a responsible disclosure exercise to Master Lock, but communication proved to be quite a challenge. In the end we managed to establish contact, and as a result the most serious vulnerabilities have now been patched. This indicates that responsible disclosure is a valuable exercise, but we still need better report-and-response mechanisms

Studi Eksperimental Rumah Pengering Kopi Menggunakan Plastik Ultra Violet (Uv Solar Dryer) Dengan Mekanisme Konveksi Alamiah

Ultraviolet solar dryer atau biasa disebut juga metode pengeringan dengan menggunakan efek rumah kaca (ERK) merupakan metode pengeringan yang memanfaatkan energi surya sebagai sumber energi utama. Radiasi dari sinar matahari diserap langsung oleh plastik UV yang berfungsi sebagai penghantar dan penahan panas sehingga temperatur didalam suatu tempat atau ruangan yang ditutupi oleh plastik UV ini tetap terjaga. Studi eksperimental rumah pengering kopi menggunakan plastik ultra violet (uv solar dryer) dengan mekanisme konveksi alamiah ini dilakukan dengan menggunakan metode eksperimen.  Tujuan untuk mengetahui waktu pengeringan biji kopi terhadap distribusi temperatur ruangan rumah pengering dengan mekanisme konveksi alamiah. Hasil pengujian menunjukkan pengaruh waktu pengeringan biji kopi terhadap distribusi temperatur di dalam ruangan rumah pengering dengan mekanisme konveksi alamiah. Pengaruh waktu pengeringan terhadap distribusi temperatur ruangan rumah pengering terlihat sedikit fluktuatif. Namun rata-rata temperatur ruangan dari beberapa titik pengukuran relatif seragam dengan nilai lebih tinggi dari lingkungan. Nilai kadar air basis basah 3,17 %, basis kering 3,07 % dan rata – rata kadar air akhir biji kopi 20,45%,  laju pengeringan 0,77 %bb/jam, dan efisiensi rumah pengering 4,84 %.Ultraviolet solar dryer or also known as the drying method using the greenhouse effect (ERK) is a drying method that utilizes solar energy as the main energy source. Radiation from sunlight is absorbed directly by UV plastic which functions as a conductor and heat barrier so that the temperature in a place or room covered by UV plastic is maintained. The experimental study of the coffee dryer house using ultraviolet plastic (UV solar dryer) with a natural convection mechanism was carried out using an experimental method. The aim was to determine the drying time of the coffee beans on the temperature distribution of the drying house using natural convection mechanisms. The test results showed the effect of coffee bean drying time on the temperature distribution in the room of the drying house using natural convection mechanisms. The effect of drying time on the room temperature distribution of the drying house is slightly fluctuating. However, the average room temperature of several measurement points is relatively uniform with higher values ​​from the environment. The moisture content value of the wet basis was 3.17%, the dry basis was 3.07% and the average final moisture content of the coffee beans was 20.45%, the drying rate was 0.77% w / h, and the efficiency of the drying house was 4.84%

Sistem Navigasi Wall Following Robot Krpai Divisi Berkaki Menggunakan Kontroler Pid

Kontes Robot Pemadam Api Indonesia (KRPAI) merupakan ajang kompetisi robotika nasional yang terdiri dari divisi Beroda dan divisi Berkaki. Pada Kontes Robot Pemadam Api Indonesia (KRPAI) divisi Berkaki, robot yang diperlombakan harus mampu bergerak menyusuri dinding arena perlombaan yang membentuk lorong dan ruangan untuk melakukan tugasnya memadamkan api dari sebuah lilin yang diletakkan pada salah satu ruang. Berdasarkan kondisi tersebut maka dalam skripsi ini dirancanglah suatu Sistem Navigasi Wall Following Robot KRPAI Divisi Berkaki Menggunakan Kontroler PID.Kontroler PID bertujuan untuk memuluskan pergerakan robot saat menyusuri dinding arena perlombaan. Dari hasil pengujian menunjukkan dengan bantuan kontroler PID, robot wall follower telah mampu mengambil keputusan gerakan yang harus dilakukan dalam mengikuti sisi dinding arena. Penentuan hasil parameter kontroler PID ini didapatkan dengan menggunakan metode hand tuning. Hasil parameter kontroler PID yang dicapai dari penelitian ini diperoleh nilai Kp=4, Ki=2, dan Kd=0,05.Kata Kunci— navigasi wall following, kontroler PID, hand tuning, KRPAI

Determinants of online trust and their impact on online purchase intention in Yogyakarta

Technological developments are very rapidly making changes in consumer behaviour where there is a transition from offline transactions to online in Yogyakarta. The purpose of this study is to evaluate and validate the influence of online trust and the factors that influence it is e-commerce knowledge, perceived reputation, perceived risk, perceived technology, prior purchase experience, to the intention of purchasing online. This study also examines the effect of perceived technology and prior purchase experience on online purchase intentions. Respondents in this study are about 260 respondents. Respondents must be domiciled in Yogyakarta and have conducted online transactions in the last 3 months. Analysis of data on research using Smart PLS 3.0. The test of measurement model that is convergent validity, discriminant validity, and internal consistency reliability is done to ensure the validity and reliability of the questionnaire and then tested the structural model to test the hypothesis, besides the fit model, predictive relevance and effect size of each latent variable. This study found that perceived risk is the most influencing factor of consumer confidence followed by prior purchase experience, perceived technology, and perceived reputation. The study also found that perceived technology and trusts influence online purchase intentions. While e-commerce knowledge has no effect on consumer trust and prior purchase experience has no effect on the intention of purchasing online

SISTEM NAVIGASI WALL FOLLOWING ROBOT KRPAI DIVISI BERKAKI MENGGUNAKAN KONTROLER PID

Kontes Robot Pemadam Api Indonesia (KRPAI) merupakan ajang kompetisi robotika nasional yang terdiri dari divisi Beroda dan divisi Berkaki. Pada Kontes Robot Pemadam Api Indonesia (KRPAI) divisi Berkaki, robot yang diperlombakan harus mampu bergerak menyusuri dinding arena perlombaan yang membentuk lorong dan ruangan untuk melakukan tugasnya memadamkan api dari sebuah lilin yang diletakkan pada salah satu ruang. Berdasarkan kondisi tersebut maka dalam skripsi ini dirancanglah suatu Sistem Navigasi Wall Following Robot KRPAI Divisi Berkaki Menggunakan Kontroler PID.Kontroler PID bertujuan untuk memuluskan pergerakan robot saat menyusuri dinding arena perlombaan. Dari hasil pengujian menunjukkan dengan bantuan kontroler PID, robot wall follower telah mampu mengambil keputusan gerakan yang harus dilakukan dalam mengikuti sisi dinding arena. Penentuan hasil parameter kontroler PID ini didapatkan dengan menggunakan metode hand tuning. Hasil parameter kontroler PID yang dicapai dari penelitian ini diperoleh nilai Kp=4, Ki=2, dan Kd=0,05.Kata Kunci— navigasi wall following, kontroler PID, hand tuning, KRPAI

MANGROVE COVERAGE CHANGE DETECTION USING LANDSAT IMAGERIES BASED ON HYBRID CLASSIFICATION IN KEMBUNG RIVER, BENGKALIS ISLAND, RIAU PROVINCE

ABSTRACT The limited scientific information and lack of attention from stakeholders on the status of mangroves in Kembung River functioned as a basis of this study. Four series of Landsat data recorded in 1996, 2002, 2010, and 2013 were used to map mangrove land cover and changes detection. Hybrid classification technique, a combination of the object-based and random forest classifications, were applied in this study. The result showed that based on hybrid classification, mangrove coverage was detected within 82.6-88.4% overall accuracy. Change detection analyses showed that the mangrove area of Kembung River was relatively stable. For nearly two decades, we found mangrove loss about 197.2 ha, gain of 251.1 ha, and unchanged of 2904.9 ha. Changes in mangrove were generally caused by anthropogenic factors such as mangrove replanting, logging, changes over the function of mangroves into the road, embankment, settlement, shrimp farms, and natural growth. Serious attention from various parties are needed to maintain the existence and sustainablility of mangrove ecosystems in Kembung River.   Keywords: Mangrove, Sungai Kembung, monitoring, Landsat, hybrid classificatio

Determining the efficacy of guppies and pyriproxyfen (Sumilarv® 2MR) combined with community engagement on dengue vectors in Cambodia: study protocol for a randomized controlled trial.

BACKGROUND: Evidence on the effectiveness of low-cost, sustainable, biological vector-control tools for the Aedes mosquitoes is limited. Therefore, the purpose of this trial is to estimate the impact of guppy fish (guppies), in combination with the use of the larvicide pyriproxyfen (Sumilarv® 2MR), and Communication for Behavioral Impact (COMBI) activities to reduce entomological indices in Cambodia. METHODS/DESIGN: In this cluster randomized controlled, superiority trial, 30 clusters comprising one or more villages each (with approximately 170 households) will be allocated, in a 1:1:1 ratio, to receive either (1) three interventions (guppies, Sumilarv® 2MR, and COMBI activities), (2) two interventions (guppies and COMBI activities), or (3) control (standard vector control). Households will be invited to participate, and entomology surveys among 40 randomly selected households per cluster will be carried out quarterly. The primary outcome will be the population density of adult female Aedes mosquitoes (i.e., number per house) trapped using adult resting collections. Secondary outcome measures will include the House Index, Container Index, Breteau Index, Pupae Per House, Pupae Per Person, mosquito infection rate, guppy fish coverage, Sumilarv® 2MR coverage, and percentage of respondents with knowledge about Aedes mosquitoes causing dengue. In the primary analysis, adult female Aedes density and mosquito infection rates will be aggregated over follow-up time points to give a single rate per cluster. This will be analyzed by negative binomial regression, yielding density ratios. DISCUSSION: This trial is expected to provide robust estimates of the intervention effect. A rigorous evaluation of these vector-control interventions is vital to developing an evidence-based dengue control strategy and to help direct government resources. TRIAL REGISTRATION: Current Controlled Trials, ID: ISRCTN85307778 . Registered on 25 October 2015

The sustainability of electricity sector during Covid-19 outbreak in Malaysia

This empirical study the relationship between risk management, security supply, financial flow and technology acceleration with sustainability of the business of TNB Malaysia. The study utilised a sample of 107 staff of TNB in Brickfields, Kuala Lumpur. The independent variable risk management, security supply, financial flow and technology acceleration while the dependent variables, is measured by sustainability of the business. The conceptual framework was proposed and the hypotheses of this study were developed. Besides, the multiple regression analysis was used in analysing the data collected in this study. The finding of the study showed that risk management, security supply, financial flow, technology acceleration and sustainability of the business have a high level. Analysis also shows that there is a positive relationship between risk management, technology acceleration and security supply and financial flow with sustainability of the business. The study concluded that it provides a useful insight to different users, the pandemic is accelerating many trends and companies need to adopt new norms for the business sustainability in the future

Entomological outcomes of cluster-randomised, community-driven dengue vector-suppression interventions in Kampong Cham province, Cambodia

Cambodia has one of the highest dengue infection rates in Southeast Asia. Here we report quantitative entomological results of a large-scale cluster-randomised trial assessing the impact on vector populations of a package of vector control interventions including larvivorous guppy fish in household water containers, mosquito trapping with gravid-ovitraps, solid waste management, breeding-container coverage through community education and engagement for behavioural change, particularly through the participation of school children. These activities resulted in major reductions in Container Index, House Index, Breteau Index, Pupal Index and Adult Index (all p-values 0.002 or lower) in the Intervention Arm compared with the Control Arm in a series of household surveys conducted over a follow-up period of more than one year, although the project was not able to measure the longer-term sustainability of the interventions. Despite comparative reductions in Adult Index between the study arms, the Adult Index was higher in the Intervention Arm in the final household survey than in the first household survey. This package of biophysical and community engagement interventions was highly effective in reducing entomological indices for dengue compared with the control group, but caution is required in extrapolating the reduction in household Adult Index to a reduction in the overall population of adult Aedes mosquitoes, and in interpreting the relationship between a reduction in entomological indices and a reduction in the number of dengue cases. The package of interventions should be trialled in other locations

Ability of the Premise Condition Index to Identify Premises with Adult and Immature Aedes Mosquitoes in Kampong Cham, Cambodia.

Aedes-transmitted diseases, especially dengue, are increasing throughout the world and the main preventive methods include vector control and the avoidance of mosquito bites. A simple Premise Condition Index (PCI) categorizing shade, house, and yard conditions was previously developed to help prioritize households or geographical areas where resources are limited. However, evidence about the accuracy of the PCI is mixed. The current study aimed to contribute to a better understanding of the relevance by collecting data from 2,400 premises at four time points over 1 year in Kampong Cham, Cambodia. Regression models were then used to identify associations between PCI and Aedes adult female mosquitoes and pupae. In addition, receiver operating characteristic curves were used to measure the ability of PCI to identify premises in the top quartile of mosquito abundance. The density of adult Aedes females was positively associated with PCI at the household (ratio of means = 1.16 per point on the PCI scale) and cluster level (ratio of means = 1.54). However, the number of Aedes pupae was negatively associated with PCI at the household level (rate ratio = 0.74) and did not have a statistically significant association at the cluster level. Receiver operating characteristic curves suggest the PCI score had "rather low accuracy" (area under the ROC curve = 0.52 and 0.54) at identifying top-quartile premises in terms of adult female Aedes and pupae, respectively. These results suggest that caution is warranted in the programmatic use of PCI in areas of similar geography and mosquito abundance