122,720 research outputs found
Penentuan Dosis Optimum Pemupukan Nitrogen pada Tanaman Padi (Oryza sativa L.) Galur Altaf di Lahan Percobaan Science Techno Park.
No full textTanaman padi (Oryza sativa L.) merupakan salah satu tanaman pangan utama
yang terus kebutuhannya terus mengalami peningkatan, namun belum diimbangi
dengan produksi nya yang memadai. Pada tahun 2021 produksi padi mencapai 54,6
juta ton lalu menurun pada tahun 2022 menjadi 54,4 juta ton. Adapun upaya yang dapat
dilakukan ialah dengan menggunakan varietas unggul, seperti galur Altaf. Adapun
tujuan penelitian ini yaitu untuk mengetahui dosis optimum pemupukan nitrogen pada
padi galur Altaf serta pengaruhnya terhadap pertumbuhan dan hasil tanaman padi.
Penelitian ini dilakukan pada periode September 2023 hingga Maret 2024 di
Lahan Percobaan Universitas Tribhuana Tuggadewi, Malang, Jawa Timur. Penelitian
menggunakan Rancangan Acak Kelompok (RAK) dengan empat ulangan dan total 20
sampel, dengan tanaman padi galur Altaf ditanam pada jarak tanam 30 x 15 cm.
Terdapat lima perlakuan pupuk yang berbeda, yaitu kontrol, Urea 50 kg/ha, Urea 100
kg/ha, Urea 200 kg/ha, dan Urea 400 kg/ha. Parameter yang diamati meliputi pH tanah,
nilai N-total, tinggi tanaman, umur berbunga, N-tanaman, serapan N, karakteristik
malai dan gabah, serta biomassa dan hasil tanaman. Data dianalisis menggunakan
analisis statistik SPSS.
Hasil penelitian menunjukkan bahwa dosis pupuk tidak berpengaruh signifikan
terhadap pH tanah, nilai N-total tanah, N-tanaman, persentase gabah isi/malai, dan
indeks panen. Namun, dosis pupuk mempengaruhi parameter pertumbuhan tanaman
seperti tinggi tanaman, umur berbunga, panjang malai, jumlah malai, persentase
tanaman berbuah, jumlah gabah/malai, jumlah gabah isi/malai, dan berat 1000 butir.
Melalui analisis ANOVA Beda Nyata Jujur (BNJ) dan analisis korelasi – regresi,
ditemukan bahwa dosis maksimum untuk pertumbuhan tanaman padi galur Altaf
adalah 310,9 kg Urea/ha atau setara dengan 142,9 kg N ha-1 dan didapatkan nilai
keuntungan terbesar terdapat pada perlakuan Urea 200 kg/ha dengan nilai Rp
65.456.000 berdasarkan metode Multi Nutrient Response. Penelitian ini memberikan
kontribusi penting dalam memahami respons tanaman padi terhadap dosis pupuk yang
berbeda, serta relevansinya terhadap produktivitas dan kualitas hasil tanaman padi
khususnya pada galur Altaf
Z. Altaf, Entrepreneurship in the Third World, Risk and Uncertainty in Industry in Pakistan
No full textÉtienne Gilbert. Z. Altaf, Entrepreneurship in the Third World, Risk and Uncertainty in Industry in Pakistan. In: Tiers-Monde, tome 29, n°115, 1988. Industrialisation et développement. Modèles, expériences, perspectives, sous la direction de Abdelkader Sid Ahmed et Alain Valette. pp. 1037-1038
Gail Minault, Voices of Silence. English translation of Khwaja Altaf Hussain Hali’s Majalis un-Nisa and Chup ki Dad. Delhi, Chanakya Publications, 1986
No full textGaborieau Marc. Gail Minault, Voices of Silence. English translation of Khwaja Altaf Hussain Hali’s Majalis un-Nisa and Chup ki Dad. Delhi, Chanakya Publications, 1986. In: Bulletin critique des annales islamologiques, n°5, 1988. pp. 194-197
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Zeba Zubair, From Mutiny to Mountbatten. A Biographical Sketch of and Writings by Altaf Husain, Former Editor of Dawn. Kegan Paul International, London and New York, 1996
No full textMatringe Denis. Zeba Zubair, From Mutiny to Mountbatten. A Biographical Sketch of and Writings by Altaf Husain, Former Editor of Dawn. Kegan Paul International, London and New York, 1996. In: Bulletin critique des annales islamologiques, n°14, 1998. pp. 146-147
The vanishing author in computer-generated works: a critical analysis of recent Australian case law
No full textAbstract
The use of software is ubiquitous in the creation of many copyright works, yet the requirement in copyright law that every work have a human author who engages in independent intellectual effort means that its use may prevent copyright subsistence. Several recent Australian cases have refocused attention on authorship as an essential criterion of copyright subsistence, and these cases suggest that much computer-produced output may be authorless and thus lack copyright protection. This article, the first in a two-part series, analyses how each case deals with the question of authorship of computer-produced works and why the use of software diminishes copyright protection for a significant number of computer-generated works. The article critiques the application of conventional notions of human authorship developed in the pre-computer age to modern productions and suggests alternative approaches to authorship that satisfy both the major objectives of copyright policy and the need to adapt to the computer age. The article argues that, without a broader judicial approach to authorship of computer-generated works, Parliament must remedy the lacuna in protection for these ‘authorless’ works. Possible solutions for reform are suggested. In a forthcoming article, the author comprehensively examines those reform proposals
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Dissipative Range Scaling of Higher Order Structure Functions for Velocity and Passive Scalars
No full textDifferently to Kolmogorov's second similarity hypothesis, we find that the 2n-th order velocity and scalar structure functions scale with n-th order moment of the energy dissipation and the scalar dissipation, respectively. The origins of this scaling are analyzed by the transport equations of the fourth order velocity and scalar increment moments and by direct numerical simulations
A chemical kinetics-based approach to predict uncontrolled self-ignitions in Hydrogen Internal Combustion Engines
No full textThe primary objective of the present work is to correlate the hydrogen explosive characteristics with internal combustion engine design parameters, particularly the engine compression ratio. An approach that couples the knowledge about H2 chemical behaviour, and the in-cylinder charge thermodynamic state, has been conceptualized in the form of a unified plot to visually inspect the likelihood of an auto-ignition event. The plot cautions the possible occurrence of autoignition if the state of the charge inside the engine cylinder reaches thermodynamic conditions beyond the explosion limit curve. Having at hand such a tool enables one to cautiously design future experiments to prevent possible damage because of extreme stresses due to an undesired autoignition event.
The results of the analyses in the present work have translated into defining a maximum limit on the compression ratio that can be proposed at pre-defined intake thermodynamic state, mixture composition, engine geometry and engine speed. Predictions based on recently developed chemical mechanisms were employed for the analyses, exploiting the well-established knowledge about the chemical kinetics of hydrogen oxidation.
Thus, zero-dimensional numerical simulations were performed. Such an approach avoids also the limitations associated with experimental procedures. To evaluate the maximum safe compression ratio, both a static and a time-based approach have been employed to study the vicinity of a thermodynamic state to the autoignition limit i.e., the explosion limit of hydrogen. Three possible criteria for the definition of a maximum safe geometrical compression ratio were developed and analysed. The present work has then been finally ensembled in the form of an empirical correlation involving intake pressure, intake temperature and equivalence ratio as the variables.
Furthermore lubricant oil as a contaminant seeping through the compression rings of a piston in an internal combustion engine, is modelled to evaluate the distribution of mass and temperature inside a droplet of n-hexadecane using 0D- simulations to evaluate the variation of ignition delay time within the droplet in gas-phase and its effect on the local concentration diluting the pure hydrogen in the vicinity and hence increasing the reactivity causing an early source of self- ignition.
A final study concerning developing detonations from hot spots is carried out to understand the effect of a temperature gradient other than ‘linear’ within the hot spot that could change the detonation response diagrams and subsequently the modes of reacting front propagation. Such detonations with high peak pressures are detrimental to components inside an internal combustion engine and therefore the need to study any possibility of its occurrence is crucial to a better understanding of the design
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