Pengaruh Sistem Olah Tanah Dan Pemberian Herbisida Terhadap Aliran Permukaan Dan Erosi Pada Fase Generatif Tanaman Singkong (Manihot Utilissima)

Aliran permukaan dan erosi merupakan penyebab kerusakan tanah yang paling besar akibatnya. Curah hujan merupakan faktor yang paling berpengaruh terhadap terjadinya aliran permukaaan dan erosi. Jika intensitas hujan melebihi kapasitas infiltrasi tanah atau telah melewati titik jenuhnya, maka sebagian besar kelebihan air tersebut akan mengalir menjadi aliran permukaan dan aliran tersebut akan menyebabkan terjadinya erosi. Penelitian ini bertujuan untuk mengetahui pengaruh sistem olah tanah dan pemberian herbisida terhadap aliran permukaan dan erosi pada fase generatif tanaman singkong. Penelitian ini menggunakan Rancangan faktorial 2x2, dengan menggunakan 4 kali ulangan. Faktor pertama adalah sistem olah tanah yaitu pengolahan tanah minimum (M) dan pengolahan tanah penuh (F). Faktor kedua yaitu pemberian herbisida (H1) dan tanpa pemberian herbisida (H0). Pengukuran aliran permukaan dan erosi dilakukan dengan menggunakan metode petak kecil dengan ukuran 4x4 meter. Pengolahan tanah tidak nyata mempengaruhi aliran permukaan dan erosi. Pemberian herbisida nyata mempengaruhi erosi yang terjadi, tetapi tidak nyata mempengaruhi aliran permukaan. Pengolahan tanah dan pemberian herbisida tidak nyata mempengaruhi tinggi tanaman, diameter batang, dan produksi umbi singkong

Satellite Remote Sensing and Field Studies on Narrowing of Three Sea Mouths of Pulicat Lake Sanctuary and Ecological Impact

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Complex formation between nickel(II) and some pentamine (substituted salicylato)cobalt(III) ions

The kinetics of reversible complexation of NiII with pentamine(substituted salicylato)cobalt(III) ions, [Co(N5){O2CC6H3(X)OH}]2+[N5= 5NH3, (en)2(NH3)(cis isomer, en = ethane-1,2-diamine) or tetren (tetraethylenepentamine), X = 3-NO2; N5= 5NH3, X = 5-NO2], was investigated by the stopped-flow technique at 15–35 °C, pH 5.70–6.90 and I= 0.30 mol dm−3(ClO4−). The formation of [(Co(N5){O2CC6H3(X)O}Ni]3+ occurs via the reaction of [Ni(OH2)6]2+ with the phenoxide form of the cobalt(III) substrates. The rate and activation parameters have been determined for the formation and dissociation of the binuclear species in which nickel(II) is chelated by the salicylate moiety. The data are consistent with and Id mechanism. The rate constant for spontaneous dissociation of the binuclear species to the reacting partners is sensitive to the nature of the pentamine moiety and decreases in the sequence tetren > (en)2(NH3)− 5NH3. The acid-catalysed dissociation of cis-[(en)2(NH3)Co{O2CC6H3(NO2−3)O}Ni]3+ conforms to a two-step process

Kinetics & Mechanism of Oxidation of Benzoin & Its Derivatives by Tl(III) in Aqueous Acetic Acid

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Evaluating the Differential Impact of Teaching Assistant Training Programs on International Graduate Student Teaching

In this study, we compared the effects of a traditional teaching assistant (TA) training program to those of a specialized program, with a substantial intercultural component, for international graduate students. We expected both programs to result in an increase in international graduate students’ teaching self-efficacy, observed teaching effectiveness, and adoption of student-centred approaches to teaching, and we anticipated a greater degree of change for the participants in the specialized program. We found the expected increases for graduate students in both programs, with a larger increase in observed teaching effectiveness for students in the specialized program. We discuss the implications of tailoring TA training programs for international graduate students and of providing time and learning activities for the development of student-centred teaching and reflective practice

Zero Temperature Dynamics of 2D and 3D Ising Ferromagnets

We consider zero-temperature, stochastic Ising models with nearest-neighbor interactions in two and three dimensions. Using both symmetric and asymmetric initial configurations, we study the evolution of the system with time. We examine the issue of convergence of the dynamics and discuss the nature of the final state of the system. By determining a relation between the median number of spin flips per site, the probability p that a spin in the initial spin configuration takes the value +1, and lattice size, we conclude that in two and three dimensions, the system converges to a frozen (but not necessarily uniform) state when p is not equal to 1/2. Results for p=1/2 in three dimensions are consistent with the conjecture that the system does not evolve towards a fully frozen limiting state. Our simulations also uncover `striped' and `blinker' states first discussed by Spirin et al., and their statistical properties are investigated.Comment: 17 pages, 12 figure

Numerical Range of Two Operators in Semi-Inner Product Spaces

In this paper, the numerical range for two operators both linear and nonlinear have been studied in semi-inner product spaces. The inclusion relations between numerical range, approximate point spectrum, compression spectrum, eigenspectrum, and spectrum have been established for two linear operators. We also show the inclusion relation between approximate point spectrum and closure of the numerical range for two nonlinear operators. An approximation method for solving the operator equation involving two nonlinear operators is also established

SafeWeb: A Middleware for Securing Ruby-Based Web Applications

Web applications in many domains such as healthcare and finance must process sensitive data, while complying with legal policies regarding the release of different classes of data to different parties. Currently, software bugs may lead to irreversible disclosure of confidential data in multi-tier web applications. An open challenge is how developers can guarantee these web applications only ever release sensitive data to authorised users without costly, recurring security audits. Our solution is to provide a trusted middleware that acts as a “safety net” to event-based enterprise web applications by preventing harmful data disclosure before it happens. We describe the design and implementation of SafeWeb, a Ruby-based middleware that associates data with security labels and transparently tracks their propagation at different granularities across a multi-tier web architecture with storage and complex event processing. For efficiency, maintainability and ease-of-use, SafeWeb exploits the dynamic features of the Ruby programming language to achieve label propagation and data flow enforcement. We evaluate SafeWeb by reporting our experience of implementing a web-based cancer treatment application and deploying it as part of the UK National Health Service (NHS)

Unbalanced segregation of a paternal t(9;11)(p24.3;p15.4) translocation causing familial Beckwith-Wiedemann syndrome: a case report.

BACKGROUND: The vast majority of cases with Beckwith-Wiedemann syndrome (BWS) are caused by a molecular defect in the imprinted chromosome region 11p15.5. The underlying mechanisms include epimutations, uniparental disomy, copy number variations, and structural rearrangements. In addition, maternal loss-of-function mutations in CDKN1C are found. Despite growing knowledge on BWS pathogenesis, up to 20% of patients with BWS phenotype remain without molecular diagnosis. CASE PRESENTATION: Herein, we report an Iranian family with two females affected with BWS in different generations. Bisulfite pyrosequencing revealed hypermethylation of the H19/IGF2: intergenic differentially methylated region (IG DMR), also known as imprinting center 1 (IC1) and hypomethylation of the KCNQ1OT1: transcriptional start site (TSS) DMR (IC2). Array CGH demonstrated an 8 Mb duplication on chromosome 11p15.5p15.4 (205,827-8,150,933) and a 1 Mb deletion on chromosome 9p24.3 (209,020-1,288,114). Chromosome painting revealed that this duplication-deficiency in both patients is due to unbalanced segregation of a paternal reciprocal t(9;11)(p24.3;p15.4) translocation. CONCLUSIONS: This is the first report of a paternally inherited unbalanced translocation between the chromosome 9 and 11 short arms underlying familial BWS. Copy number variations involving the 11p15.5 region are detected by the consensus diagnostic algorithm. However, in complex cases which do not only affect the BWS region itself, characterization of submicroscopic chromosome rearrangements can assist to estimate the recurrence risk and possible phenotypic outcomes