Modular Smart House System Based on a Wireless Sensor Network

Smart House is an automated and controlled system, which enables adjustment of living environment according to user demands. Advancements of wireless sensor network (WSN) technology give us an opportunity to improve, simplify and ensure a costeffective smart home system. The paper describes the system composed of the BeagleBoard-xM, an XBeePro S2B coordinator, an XBee smart plug and a sensor, a mobile and a web application. The test solution was made in the laboratory environment. Compared to other existing solutions, the proposed system has benefits such as low-power consumption, cost effectiveness, modularity, module placement independence of power source, etc. In future, the system can be supplemented by power consumption regulation, speech and face recognition software, etc

Parallel Redundancy System for Critical Conditions Monitoring and Alerting

Monitoring critical conditions is of outmost importance in any system for achieving long life and stability. In this process, various parameters can be classified as critical and their values must be kept within a bounded interval by means of monitoring and acting upon a change in the value. A practical example of critical conditions monitoring is temperature monitoring in data centers (server rooms) where the temperature value must be kept below a certain threshold in order to achieve long life and stability of equipment. This paper presents a system designed for monitoring temperatures and alerting of their critical values is proposed - PRSMA. With a parallel redundancy feature that guarantees high reliability of the proposed solution, this approach achieves timely alerting upon critical condition, real-time supervision of temperature values and forecasting of critical conditions. The redundancy aspect is realized by using a mobile operator link alongside with the Internet-based landline connection to a cloud-based service – the Internet of Things concept. The proposed architecture is tested in laboratory conditions and the advantages of this approach are shown through measurement and testing

Parallel Redundancy System for Critical Conditions Monitoring and Alerting

Monitoring critical conditions is of outmost importance in any system for achieving long life and stability. In this process, various parameters can be classified as critical and their values must be kept within a bounded interval by means of monitoring and acting upon a change in the value. A practical example of critical conditions monitoring is temperature monitoring in data centers (server rooms) where the temperature value must be kept below a certain threshold in order to achieve long life and stability of equipment. This paper presents a system designed for monitoring temperatures and alerting of their critical values is proposed - PRSMA. With a parallel redundancy feature that guarantees high reliability of the proposed solution, this approach achieves timely alerting upon critical condition, real-time supervision of temperature values and forecasting of critical conditions. The redundancy aspect is realized by using a mobile operator link alongside with the Internet-based landline connection to a cloud-based service – the Internet of Things concept. The proposed architecture is tested in laboratory conditions and the advantages of this approach are shown through measurement and testing

The supramolecular arrangement in the Ni(II) complexes of isothiosemicarbazide

The molecules of two complexes [Ni(ITSC)2(H2O)2](tere)·2H2O and [Ni(ITSC)2(NO3)2] (ITSC = S-methylisothiosemicarbazide; tere = terephthalate) tend to associate trough the hydrogen bonding interactions into the characteristic 2D blocks separated by the S-methyl moieties. The different coordination mode of the isothiosemicarbazide comparing to thiosemicarbazide (TSC) prevents the formation of the complementary hydrogen bonds with dicarboxylate important for selfassambly of TSC complexes, however in these ITSC the terephthalate anion has role in connection of the blocks and transformation of the 2D into the 3D supramolecular structure. The similar crystal arrangement is found in two earlier reported complexes of Ni(II) with ITSC.Physical chemistry 2004 : 7th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 21-23 September 200

Study of C−H⋅⋅⋅π interactions with pyrrole and chelate rings in metal-porphyrin complexes

The Cambridge Structural Database (CSD) was screened in order to find and investigate specific C−H⋅⋅⋅π interactions between C−H groups and two types of rings with delocalized π-bonds that exist in porphyrin: pyrrole and six-membered chelate. Statistical analysis of geometrical parameters for interactions in both types of rings was done. In order to determine preferred positions in porphyrinato ring for C−H⋅⋅⋅π interactions fifteen different points distributed over porphyrin ring have been chosen and each of them have been analyzed. Calculations of these interactions by density functional theory (DFT) have been done on three different model systems.Physical chemistry 2006 : 8th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 26-29 September 200

Crystal and absolute structure of the aquadichloro(pyridoxal thiosemicarbazone) iron(III) chloride

A new Fe(III) complex of pyridoxal thiosemicarbazone (H2L) has been characterized by single-crystal X-ray analysis. The Fe atom in the title complex, [Fe(H2L)Cl2(H2O)]Cl, has a distorted octahedral configuration formed by NSO2Cl2 donor set. Six-membered chelate ring significantly deviates from planar form. The crystal structure is stabilized by weak intermolecular C-H…π interaction directed towards the center of the pyridine ring.Physical chemistry 2004 : 7th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 21-23 September 200

Crystal structure of ethylenediammonium-N,N -di-3-propionic acid tetrachloroplatinate(II), (CH2NH2(CH2)(2)COOH)(2)[PtCl4]

C8H18Cl4N2O4Pt, monoclinic, P12(1)/n1 (no. 14), a = 8.181(3) angstrom, b = 10.303(5) angstrom, c = 9.073(6) angstrom, beta = 103.2(1)degrees, V = 744.6 angstrom(3), Z = 2, R-gt(F) = 0.080, wR(ref)(F-2) = 0.247, T = 293 K

Modular Smart House System Based on a Wireless Sensor Network

Smart House is an automated and controlled system, which enables adjustment of living environment according to user demands. Advancements of wireless sensor network (WSN) technology give us an opportunity to improve, simplify and ensure a costeffective smart home system. The paper describes the system composed of the BeagleBoard-xM, an XBeePro S2B coordinator, an XBee smart plug and a sensor, a mobile and a web application. The test solution was made in the laboratory environment. Compared to other existing solutions, the proposed system has benefits such as low-power consumption, cost effectiveness, modularity, module placement independence of power source, etc. In future, the system can be supplemented by power consumption regulation, speech and face recognition software, etc

Legijski logor u Viminacijumu: istraživanja severnog dela utvrđenja u 2020. godini

Obimna zaštitna arheološka iskopavanja na prostoru viminacijumskog legijskog utvrđenja vršena su od 2016. do 2018. godine. Ovi radovi bili su usmereni na fortifikacioni sistem u severozapadnom delu logora. Od kraja 2018. i tokom 2019. godine vrše se sistematska iskopavanja u unutrašnjosti severozapadnog dela utvrđenja (Sektor I). Navedenim istraživanjima definisane su dve osnovne faze izgradnje kastruma. Prvu fazu, koja se datuje u poslednje decenije 1. veka, odlikuje utvrđenje rađeno crvenkom,3 dok drugoj fazi, datovanoj u 2. vek, odgovara logor izgrađen od škriljca i krečnjaka. Tokom druge faze uočava se nekoliko etapa u izgradnji, koje se prate do početka 4. veka

Intramolecular C-H⋯π interactions in metal-porphyrin complexes

Cambridge Structural Database (CSD) was screened in order to find intramolecular C-H⋯π interactions with a chelate ring of coordinated porphyrin. It was found 154 crystal structures with 244 intramolecular C-H⋯π interactions in transition metal complexes with derivatives of porphyrin. Comparison of interacting distances indicates that interactions of hydrogen atoms in positions 2 and 6 of axially coordinated pyridine are more favorable with ruffled than with planar porphyrin