54 research outputs found
Pariwisata Berbasis Masyarakat Sebagai Pelestari Tradisi di Desa Samiran
No full textThe purpose of this paper is to describe the exist traditions in Samiran Village and to study how far the people participation of Samiran Village as tradition preservers. A qualitative approach is used in this paper and described descriptively. Conducting literature studies, in-depth interviews, and observations is used in this paper. Assisted by participatory theory to analyze ho far the community participation as tradition preservers. The results show that the people of Samiran Village still carry out the sadranan and baritan traditions. The purpose of this tradition is to honor the ancestors, give thanks for the harvest, ask for blessings and a sense of mutual help. Community participation in tradition activities in Samiran Village consists of 2 types, namely active and passive participation. Direct participation carried on the tradition Sadranan, whereas indirect participation carried on the tradition baritan. With the concept of a community-based tourism, traditional activities can become a cultural tourist attraction. This paper proposes the role of the community as a preserver of tradition so that it is maintained and preserved. This paper also recommends a study on the role of the community as a preserver of other traditions that have not been mentioned by the author
Crystal structure of [Fe(L<sup>1</sup>)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub>.H<sub>2</sub>O having Fe<sup>II</sup>N<sub>6</sub> coordination [L<sup>1</sup>= 2,6- bis(pyrazol-1-ylmethyl)pyridine]
No full text973-975The structure
of the compound [Fe(L1)2](ClO4)2.H2O
(1)[L1= 2,6-
bis(pyrazol-1-ylmethyl)pyridine]
has been determined by X-ray crystallography at ≈130 K. Temperature-dependent magnetic
susceptibility and Mossbauer spectral studies reveal that the iron atom in 1 is
in the high-spin state at room temperature and in the low-spin state at low
temperature, whereas in [Fe(L2)2](ClO4)2.H2O
(2) and [Fe(L3)2](ClO4)2.H2O
(3) [L2 = 2,6-bis(3,5-
dimethylpyrazole-1-ylmethyl)pyridine
and L3 = 2-(pyrazol-1-ylmethyl)-
6-(3,5-dimethylpyrazol-1-ylmethyl)pyridine)
the iron atom is in the high-spin state at both the temperatures [Mahapatra S,
Mukherjee R, Polyhedron 12 (1993) 1603]. The metal-ligand bond distances
in 1 have been compared with those of 3, determined at ≈173 K
[Mahapatra S, Butcher R J, Mukherjee, R,
J chem Soc,
Dalton Trans (1993)
3723]. The Fe-Npyridine and Fe-Npyrazole
bond
distances in 1 are shorter by ~0.23 Å and ~0.14 Å,respectively, than
those for the high-spin complex 3, revealing its low-spin character. Moreover,
a noticeable variation of the N-Fe-N angles, leading to a more regular shape of
the FeIIN6 octahedron in 1, is observed
SAMIRAN DAM PERFORMANCE ANALYSIS BASED ON THE CRITERIA FOR EVALUATION OF BUILDING FUNCTIONS AND STRUCTURES USING THE AHP METHOD IN PAMEKASAN REGENCY
No full textThe purpose of the author conducting this research is a follows: (1) as a criterion for determining the condition of the existing weir and an assessment of the function of the weir according to the existence of the building, (2) to obtain the value of the components of the weir building so that it can be used in weir work on the existence and function of the building. , (3) to analyze the results of the work of the dam on the Samiran Embankment allocated in Pamekasan Regency to the existence and function of the dam building. The current study raises the subject of the Samiran Dam which is located in Samiran, a remote village from one of the sub-districts located in the middle of Pamekasan Regency, East Java Province. Methods for collecting data can be obtained from direct surveys in the field, so that from these results the data is then processed. The next step, the existence and purpose of the construction of the Samiran weir can be analyzed according to the initial concept. The method used is AHP. From analyzing and then collecting weir data which aims to obtain work from the weir and the presence of damaged weir components in the form of discharge strength of 18.89%, presence of sediment 1.25%, lighthouse 0.19%, extraction building 2.56%, drainage building 4.26%, flushing buildings 1.88%, and mud bags 4.15%. The following are the results of analyzing the work of the weir according to the use of weir components, namely discharge 32.92%, sediment 3%, lighthouse 2.39%, intake building 14.29%, draining building 21.14%, flushing building 21.14%, and mud bag 9.86%. From the results above, it can be assumed that the component of the work of the dam on the Samiran reservoir is 33.18% damaged with the position of the weir being slightly damaged. Meanwhile, the usefulness of the weir work on the Samiran reservoir is 93.31% and the condition of the weir is fine
Velocity-Dependent Dark Matter Annihilation from Simulations, and 3D Modeling of the Interstellar Medium of the Milky Way
No full textThis dissertation is composed of two main research topics: velocity-dependent dark matter (DM) annihilation from simulations, and 3D modeling of the interstellar medium of the Milky Way (MW). The former has been my focus of research for the last four years, and has resulted in the three papers discussed in this dissertation. We have performed numerical calculations of J -factors using hydrodynamical simulations of galaxies from the Auriga and APOSTLE simulations. My first project involves calculations of velocity-dependent line-of-sight J -factors for the smooth DM halo component of MW-like galaxies. We also determine that the DM relative velocity distribution can be modeled using a Maxwell-Boltzmann distribution. My second project includes the velocity-dependent annihilation radiation from DM substructure, or subhalos, within the Auriga simulations. My third project focuses on the velocity-dependent DM annihilation from dwarf spheroidal (dSph) analogues within the APOSTLE simulations. In my fourth project, we are currently working to extend this research to examine the velocity-dependent J -factors of the Andromeda galaxy (M31). We hope to compare these J -factors to the extended ��-ray emission detected from M31. Another project that I am working on involves creating a 3D model of the interstellar radiation field (ISRF) of the MW. We plan for this model to include large-scale structures, such as spiral arms and the bar, as well as details of the stellar and dust distribution in the MW. My contribution to the project is a 3D completeness model of OB stars in Gaia DR3
Synthesis, spectroscopy and electrochemistry of ruthenium(II) complexes of tridentate pyridylpyrazole ligands. Predominance of electronic over steric effects
No full textThe preparations and properties of bis complexes of ruthenium(II) containing various combinations of the tridentate ligands 2,6-bis(pyrazol-1-ylmethyl)pyridine (L1) and di- and tetra-methyl substituted derivatives (L2 and L3) are described. The absorption spectral properties of the complexes are thoroughly analysed. Full assignments have been made for the 1H NMR spectra of two representative complexes in CD3CN and the origins of the co-ordination-induced shifts are discussed. Cyclic voltammetric experiments (MeCN solutions) reveal reversible one-electron RuIII-RuII redox couples in the potential range 1.00-1.06 V vs. saturated calomel electrode (SCE). The occurrence of ligand-based irreversible reductions at low potentials (Ep,c values lie in the range: -1.90 to -2.20 V vs. SCE) reveals that these pyrazole-rich ligands are very poor p acceptors. The formal potentials of the RuIII-RuII couples decrease (by ca. 8 mV per methyl group) as the number of methyl groups in the ligands are increased. The decreased potential step size for [RuL(L')]2+(L,L'= L1-L3) relative to those observed for non-sterically hindered ruthenium(II) complexes reveals that in the present system steric effects due to 3-Me substituent(s) contribute to the observed effect but that electronic factors predominate over steric effects
Consequences of electronic/steric effects on monochelate and bischelate manganese(II) (S =5/2 ) complexes using pyridinylpyrazole ligands. Synthesis and electrochemistry
No full textA group of three high-spin manganese(II) bis-chelates were synthesized using tridentate 2,6-bis(pyrazol-l-ylmethyl)pyridine and its methyl substituted derivatives. The complexes were isolated as crystalline diperchlorate salts. Two five-coordinate mono-chelates with two chlorides as co-ligands were also synthesized. All the complexes were characterized using conventional physico-chemical techniques. Nucleophilic halide displacement reactions in water on the dichloro complexes afforded aqua complexes. When examined by cyclic voltammetry each complex displays an irreversible MnIII/MnII couple. The trends in the anodic peak potentials are rationalized on the basis of electronic/steric effects of the methyl groups present near the donor site
New triply bridged diiron(III) complexes with [Fe<SUB>2</SUB>(μ-O)(μ-X)<SUB>2</SUB>]<SUP>2+</SUP> cores [X = MeCO<SUB>2</SUB>, PhCO<SUB>2</SUB> or (PhO)<SUB>2</SUB>PO<SUB>2</SUB>]
No full textA group of three diiron(III) complexes having [Fe2(μ-O)(μ-X)2]2+ cores (X = benzoate, acetate or diphenyl phosphate) has been synthesised with the use of unsymmetrical facially capping tridentate ligands (L1 and L2), where L1 and L2 are [2-(2-pyridyl)ethyl](2-pyridylmethyl)amine and methyl[2-(2-pyridyl)ethyl](2-pyridylmethyl)amine respectively. The lability of the bridging acetate groups in [Fe(μ-O)(μ-MeCO2)2L22]2+ has been demonstrated by exchange with diphenyl phosphate and deuterioacetate as revealed by UV/VIS and 1H NMR studies. These complexes exhibit infrared, electronic and Mossbauer spectral features very similar to those of μ-oxo-diiron(III) proteins as well as of μ-oxo-bis(μ-carboxylato) or μ-oxo-bis(μ-phosphato)diiron(III) complexes. The inequivalence in the chelate rings around each iron(III) might have caused the asymmetry in these compounds which is reflected in their distinctively strong antiferromagnetic coupling (J=-127, -125 and -108 cm-1 for the benzoate-, acetate- and phosphate-bridged complexes respectively)
Consequences of incremental steric crowding at the Fe<SUP>II</SUP>N<SUB>6</SUB>(S=2) co-ordination sphere. Synthesis, spectra and electrochemistry
No full textThe effect of methyl substituents adjacent to donor atoms on the complexing properties of a novel family of tridentate (N3) heterocyclic ligands has been explored. In the course of this investigation a new group of high-spin iron(II) complexes has been synthesised. The characterization in solution of FeIIN6 co-ordination has been done on the basis of paramagnetically shifted 1H NMR spectroscopy. Increased steric crowding progressively decreases the values of 10 Dq for these ligands with iron(II) and nickel(II) in the grossly octahedral complexes. The iron(II) complexes also display metal-to-ligand charge-transfer (m.l.c.t.) transition at ca. 360 nm. Cyclic voltammetric studies (MeCN solutions) reveal reversible one-electron FeIII-FeII redox couples at high potentials [1.06-1.22 V vs. saturated calomel electrode (SCE)]. The electrochemical experiments further corroborate the fact that in the present system steric effects due to 3-Me substituent(s) predominate over the electronic contributions of the 5-Me substituent
A new mixed-valence binuclear complex containing the [Mn<SUP>IV</SUP>(μ-O)<SUB>2</SUB>(μ-O<SUB>2</SUB>CMe)Mn<SUP>III</SUP>]<SUP>2+</SUP> core: synthesis, magnetism, electron paramagnetic resonance and redox properties
No full textThe complex [Mn2(μ-O)2(μ-O2CMe)L2][ClO4]2·H2O 1{L = methyl[2-(2-pyridyl)ethyl](2-pyridyl-methyl)amine} has been synthesised and isolated in the solid state. In MeCN solution complex 1 exhibits absorption spectral features characteristic of the [Mn2(μ-O)2(μ-O2CMe)]2+ core. Variable-temperature (19.8-300 K) solid-state magnetic susceptibility data are consistent with a doublet ground state with J=-144 cm-1. The X-band EPR spectrum at 77 K exhibits a sixteen-line pattern centred at g= 2. This spectrum is attributed to the overlap of hyperfine splitting of two chemically distinct manganese nuclei (l= 5/2) with one hyperfine coupling constant being roughly twice the magnitude of the other. Cyclic voltammetry of 1 shows a quasi-reversible one-electron oxidation [E½=+1.0 V vs. saturated calomel electrode (SCE)] to the MnIV2 species as well as an irreversible one-electron reduction (Epc=-0.10 V vs. SCE) to the MnIII2 species. Coulometric or perchloric acid oxidation generates the orange MnIV2 species. The redox stability and the absorption spectral properties of this oxidised species have been investigated
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