Muhammad Nurhuda | University of Brawijaya (original) (raw)
Papers by Muhammad Nurhuda
Jurnal Pertanian Agros, 2021
This study aims to assess the manure and compost on yield and carbohydrate content of green beans... more This study aims to assess the manure and compost on yield and carbohydrate content of green beans. Supporting data were obtained from field experiments in Parangtritis village, Kretek sub-district, Bantul district, D.I. Yogyakarta which has a height of 10 m above sea level. The type of soil used is beach sand. This experiment was carried out using a split plot covering two factors, the first factor was watering frequency as the main plot and the second factor was the treatment of manure and compost as a sub plot. Observation variables included: number of pods per plant, weight of pods per plant, weight of seeds per plant, weight of 100 seeds, weight of seeds per ha, carbohydrate content, vitamin E content. Data were analyzed by analysis of variance in the level of 5%, followed by using Duncan's multiple range test (Duncan Multiple) at 5% level. Treatment of goat manure, chicken coop and compost gave yields per hectare and Sum Quality Rate was higher than without fertilizer. Forecasting treatment. showed no significant difference to the yield of green beans per hectare and the Sum Quality Rate. Compost treatment with watering every three days gave the highest carbohydrate content of 64.80% per 100g.
Jurnal Pertanian Agros, 2021
The research aims to examine the types of manure on the yield and content of Vitamin E and Vitami... more The research aims to examine the types of manure on the yield and content of Vitamin E and Vitamin A in green beans (Vigna Radiata L.). Supporting data were obtained from experiments carried out in January-March 2020 in the land of Pasir Depok, Bantul, DI Yogyakarta. 10 meters above sea level. Research in the field using the Split Plot design includes two factors, namely the first factor is the frequency of watering once a day and every three days as the main plot and the second factor is the provision of manure, namely without fertilizer, cow manure, goat manure, chicken manure as a sub plot. Based on the results of the research, that the treatment of cow, goat and chicken manure gave higher yields of green beans per hectare than without fertilizer. The frequency of watering showed no effect on the yield per hectare of green pods. The combination of cow treatment with watering every three days gave the lowest vitamin E content of green beans of 121.77 mg / 100 g compared to the treatment without fertilizer with watering once every three days. The combination of treatment without fertilizer with watering once a day gave the highest content of vitamin A green beans senesar 5365.22 µm per 100 g.
Jurnal Pertanian Agros, 2021
This study aims to determine the effect of various kinds of organic fertilizers and watering diff... more This study aims to determine the effect of various kinds of organic fertilizers and watering differences in mungbean (Vigna radianta L.) plants. This research takes location in Parangtritis Village, Kertek, Bantul Regency, Daerah Istimewa Yogyakarta, in the altitude of ± 10 meters above sea level. The characteristic of soil in this location is sandy. The research used split plot design by applying two factors. The first factor in this study was watering consisting of once a day and three days once. While the second factor is the provision of organic fertilizers, namely without applying fertilizers, compost, vermicompost, guanophosphate. The variables observed were in the generative phase which included number of pods, pod weight per plant, seed weight per plant, seed weight per hectare, weight of 100 seeds, carbohydrate content, protein content, and fat content. The analysis of the observational data used variance at the 5% real, while the differences between treatments were tested by using the Duncan Multiple Range Test at the 5%. Based on the research results, it can be concluded that the treatment of compost, vermicompost and guanophosphate gave higher yields per hectare than without fertilizer. The treatment of watering frequency once a day gave a higher yield per hectare of green beans than the frequency of watering once every three days. The combination of giving compost with a frequency of watering once every three days on mungbean plants gives the highest yield quality.
Jurnal Pertanian Agros, 2021
This study aims to examine the manure and vermicompost on yield, fat content and vitamin E of gre... more This study aims to examine the manure and vermicompost on yield, fat content and vitamin E of green beans. Supporting data obtained from experiments arranged in a split plot includes two factors. First factor is frequency of watering as main plot and second factor is application of manure and vermicompost as sub-plot. Observation variables included: number of pods, pod weight per plant, seed weight per plant, seed weight per hectare, weight 100 seeds, fat content, vitamin E content. Supporting data and primary data were analyzed by Anova at 5% level followed by Duncan Multiple Range Test at level of α = 5%. Result: combination treatment of giving chicken manure with three days of watering once gave a yield of 1.43 tonnes per hectare per hectare. Combination treatment of giving chicken manure with watering once a day gave a combination of giving goat manure with three days of watering once gave a sum quality rate of 0.13. Combination treatment of watering once a day with chicken manure showed highest yield of 100 seeds of 6.30 grams compared to other treatments. Combination treatment of giving goat manure fertilizer with three days of watering once gave highest fat content of 1.29%. Combination treatment of goat manure with three days of watering once gave highest vitamin E content of 144 mg per 100 g.
A Stanene, is a two-dimensional material composed of tin atoms arranged in a single hexagonal lay... more A Stanene, is a two-dimensional material composed of tin atoms arranged in a single hexagonal layer, in a manner similar to graphene. First principle studies based on density functional theory were performed to investigate the effects of hydrogenation and Al/P doping on electronic structure and magnetic properties of stanene. Hydrogenation opens the bandgap of stanene and changes it from nonmagnetic to the ferromagnetic material through H 1s states and Sn 5p states hybridization. Al/P atom at hollow site prevent electrons of adjacent Sn atoms to connect so that inducing unpaired electrons. The combination of hydrogenation and Al/P doping increases its magnetization. The sequence based on its magnetic moment from small to large is as follows: pure stanene, Al-doped stanene, P-doped stanene, hydrogenated stanene, Al-doped hydrogenated stanene, and P-doped hydrogenated stanene. The controllable transformation from nonmagnetic metallic to a magnetic semiconductor is a key requirement fo...
Technical Digest. CLEO/Pacific Rim 2001. 4th Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.01TH8557), 2001
We investigate the nonlinear susceptibility of noble gas atom interacting with intense laser fiel... more We investigate the nonlinear susceptibility of noble gas atom interacting with intense laser field. The solution is obtained by solving the time dependent Schrodinger equation. It is shown that the behavior of nonlinear susceptibility strongly depends on the intensity; it increases almost linearly in low intensity regime, then becomes saturated at higher intensity. Furthermore, at intensity beyond the saturation value, the nonlinear susceptibility is substantially induced by the ionization of the atom, leading to rapid fall of the nonlinear refractive index
Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, 2002
Summary form only given. We report spatial and temporal dynamics of femtosecond laser pulses obse... more Summary form only given. We report spatial and temporal dynamics of femtosecond laser pulses observed in argon and compare the results with theoretical calculations. The nonlinear optical phenomena such as spatiotemporal splitting and pulse shortening have been observed in detail.
Physical Review A, 2006
The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has be... more The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has been studied in gaseous media over a wide pressure range. The existence of two different types of optical supercontinua, structured and structureless, has been found in a number of atomic (argon, krypton) and molecular (methane) gases. The structured optical supercontinuum exhibits a typical oscillationlike spectral structure, resulting
Springer Series in Chemical Physics, 2005
A proposal for spectral broadening of tens milli Joule femtosecond laser pulses in an argon-fille... more A proposal for spectral broadening of tens milli Joule femtosecond laser pulses in an argon-filled hollow fiber is presented. The simulation results show that themethod could be useful under conditions where ionization plays a greater role and that it can be used to control ...
Springer Series in Chemical Physics, 2005
ABSTRACT
Physical Review A, 2001
... We investigate a simply corrected Keldysh-Faisal-Reiss KFR rate formula for laser-induced ion... more ... We investigate a simply corrected Keldysh-Faisal-Reiss KFR rate formula for laser-induced ionization of atoms in the nonperturbative intensity domain. Predictions of the formula are compared, first, with ab initio Floquet calculations, which show good agreement in the ...
Jurnal Teknik Mesin, 2000
A new method for continuous trans-esterification process that is based on the microwave heating, ... more A new method for continuous trans-esterification process that is based on the microwave heating, has been developed. The design consists of a microwave cavity, where in a transparent pipe is througly set up. This transparent pipe is used to continuously flow the biodiesel ...
jasosx.ils.uec.ac.jp
Page 1. Jc'sev c'vigioc't Numerical Simulation of Femto-and Subfemtose... more Page 1. Jc'sev c'vigioc't Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High-Order Harmonic Waves Muhammad NURHUDA, Akira SUDA,* and Katsumi MIDORIKAWA* Physics ...
Computer Physics Communications, 2001
A method to solve the time-dependent Schrödinger equation of the hydrogen atom and hydrogen-like ... more A method to solve the time-dependent Schrödinger equation of the hydrogen atom and hydrogen-like ions in intense laser pulses, based on an expansion of the total wavefunction in bound and continuum eigenstates of the unperturbed system, is presented. The problem arising from the well-known singular continuum–continuum dipole matrix elements is fully analyzed and resolved by a combination of analytical integration of the singular contribution and a numerical integration of the singularity-free difference contribution. Unlike in usual finite-difference methods using a spatial grid, in the present approach, probability amplitudes of bound–bound, bound–free and free–free transitions are obtained without additional calculations. The efficacy and accuracy of the present method is demonstrated by calculating above-threshold ionization spectra (ATI) and high harmonic generation spectra (HHG) for different values of laser parameters. Finally, the results obtained by using the present method are compared with that of a finite-difference method involving a spatial grid. The present method proves to be an efficient alternative to the usual spatial grid methods for the solution of the time-dependent Schrödinger equation and the estimation of ATI and HHG spectra in case of intense laser pulses.
Computer Physics Communications, 2004
In view of the controversy on atomic stabilization, two different methods for numerically integra... more In view of the controversy on atomic stabilization, two different methods for numerically integrating the time dependent Schrödinger equation (TDSE) are studied and compared, i.e. the direct integration on spatial grids (DISG) and the eigenstate expansion method (EEM) with exact treatment of free–free dipole matrix elements (FFDME). The simulations show that both methods provide the above threshold ionization (ATI) spectra and wavepacket densities that agree very well each other. This comparison is important regarding a claim that DISG may suffer a numerical instability due to the lack of FFDME [T. Mercouris et al., J. Phys. B 29 (1996) L13]. Using the eigenstate expansion method, a series of simulations with high frequency, ultra intense laser were carried out. The results show that the ionization yield first increases, and then decreases or stabilizes when intensity goes to a value beyond the turning point. Simulations using various pulse forms prove that the stabilization presents and is not subject to the pulse form.
Physical Review A, 2006
The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has be... more The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has been studied in gaseous media over a wide pressure range. The existence of two different types of optical supercontinua, structured and structureless, has been found in a number of atomic (argon, krypton) and molecular (methane) gases. The structured optical supercontinuum exhibits a typical oscillationlike spectral structure, resulting
REVIEW OF LASER …, 2000
... Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High... more ... Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High-Order Harmonic Waves. ... Title;Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High-Order Harmonic Waves. ...
Jurnal Pertanian Agros, 2021
This study aims to assess the manure and compost on yield and carbohydrate content of green beans... more This study aims to assess the manure and compost on yield and carbohydrate content of green beans. Supporting data were obtained from field experiments in Parangtritis village, Kretek sub-district, Bantul district, D.I. Yogyakarta which has a height of 10 m above sea level. The type of soil used is beach sand. This experiment was carried out using a split plot covering two factors, the first factor was watering frequency as the main plot and the second factor was the treatment of manure and compost as a sub plot. Observation variables included: number of pods per plant, weight of pods per plant, weight of seeds per plant, weight of 100 seeds, weight of seeds per ha, carbohydrate content, vitamin E content. Data were analyzed by analysis of variance in the level of 5%, followed by using Duncan's multiple range test (Duncan Multiple) at 5% level. Treatment of goat manure, chicken coop and compost gave yields per hectare and Sum Quality Rate was higher than without fertilizer. Forecasting treatment. showed no significant difference to the yield of green beans per hectare and the Sum Quality Rate. Compost treatment with watering every three days gave the highest carbohydrate content of 64.80% per 100g.
Jurnal Pertanian Agros, 2021
The research aims to examine the types of manure on the yield and content of Vitamin E and Vitami... more The research aims to examine the types of manure on the yield and content of Vitamin E and Vitamin A in green beans (Vigna Radiata L.). Supporting data were obtained from experiments carried out in January-March 2020 in the land of Pasir Depok, Bantul, DI Yogyakarta. 10 meters above sea level. Research in the field using the Split Plot design includes two factors, namely the first factor is the frequency of watering once a day and every three days as the main plot and the second factor is the provision of manure, namely without fertilizer, cow manure, goat manure, chicken manure as a sub plot. Based on the results of the research, that the treatment of cow, goat and chicken manure gave higher yields of green beans per hectare than without fertilizer. The frequency of watering showed no effect on the yield per hectare of green pods. The combination of cow treatment with watering every three days gave the lowest vitamin E content of green beans of 121.77 mg / 100 g compared to the treatment without fertilizer with watering once every three days. The combination of treatment without fertilizer with watering once a day gave the highest content of vitamin A green beans senesar 5365.22 µm per 100 g.
Jurnal Pertanian Agros, 2021
This study aims to determine the effect of various kinds of organic fertilizers and watering diff... more This study aims to determine the effect of various kinds of organic fertilizers and watering differences in mungbean (Vigna radianta L.) plants. This research takes location in Parangtritis Village, Kertek, Bantul Regency, Daerah Istimewa Yogyakarta, in the altitude of ± 10 meters above sea level. The characteristic of soil in this location is sandy. The research used split plot design by applying two factors. The first factor in this study was watering consisting of once a day and three days once. While the second factor is the provision of organic fertilizers, namely without applying fertilizers, compost, vermicompost, guanophosphate. The variables observed were in the generative phase which included number of pods, pod weight per plant, seed weight per plant, seed weight per hectare, weight of 100 seeds, carbohydrate content, protein content, and fat content. The analysis of the observational data used variance at the 5% real, while the differences between treatments were tested by using the Duncan Multiple Range Test at the 5%. Based on the research results, it can be concluded that the treatment of compost, vermicompost and guanophosphate gave higher yields per hectare than without fertilizer. The treatment of watering frequency once a day gave a higher yield per hectare of green beans than the frequency of watering once every three days. The combination of giving compost with a frequency of watering once every three days on mungbean plants gives the highest yield quality.
Jurnal Pertanian Agros, 2021
This study aims to examine the manure and vermicompost on yield, fat content and vitamin E of gre... more This study aims to examine the manure and vermicompost on yield, fat content and vitamin E of green beans. Supporting data obtained from experiments arranged in a split plot includes two factors. First factor is frequency of watering as main plot and second factor is application of manure and vermicompost as sub-plot. Observation variables included: number of pods, pod weight per plant, seed weight per plant, seed weight per hectare, weight 100 seeds, fat content, vitamin E content. Supporting data and primary data were analyzed by Anova at 5% level followed by Duncan Multiple Range Test at level of α = 5%. Result: combination treatment of giving chicken manure with three days of watering once gave a yield of 1.43 tonnes per hectare per hectare. Combination treatment of giving chicken manure with watering once a day gave a combination of giving goat manure with three days of watering once gave a sum quality rate of 0.13. Combination treatment of watering once a day with chicken manure showed highest yield of 100 seeds of 6.30 grams compared to other treatments. Combination treatment of giving goat manure fertilizer with three days of watering once gave highest fat content of 1.29%. Combination treatment of goat manure with three days of watering once gave highest vitamin E content of 144 mg per 100 g.
A Stanene, is a two-dimensional material composed of tin atoms arranged in a single hexagonal lay... more A Stanene, is a two-dimensional material composed of tin atoms arranged in a single hexagonal layer, in a manner similar to graphene. First principle studies based on density functional theory were performed to investigate the effects of hydrogenation and Al/P doping on electronic structure and magnetic properties of stanene. Hydrogenation opens the bandgap of stanene and changes it from nonmagnetic to the ferromagnetic material through H 1s states and Sn 5p states hybridization. Al/P atom at hollow site prevent electrons of adjacent Sn atoms to connect so that inducing unpaired electrons. The combination of hydrogenation and Al/P doping increases its magnetization. The sequence based on its magnetic moment from small to large is as follows: pure stanene, Al-doped stanene, P-doped stanene, hydrogenated stanene, Al-doped hydrogenated stanene, and P-doped hydrogenated stanene. The controllable transformation from nonmagnetic metallic to a magnetic semiconductor is a key requirement fo...
Technical Digest. CLEO/Pacific Rim 2001. 4th Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.01TH8557), 2001
We investigate the nonlinear susceptibility of noble gas atom interacting with intense laser fiel... more We investigate the nonlinear susceptibility of noble gas atom interacting with intense laser field. The solution is obtained by solving the time dependent Schrodinger equation. It is shown that the behavior of nonlinear susceptibility strongly depends on the intensity; it increases almost linearly in low intensity regime, then becomes saturated at higher intensity. Furthermore, at intensity beyond the saturation value, the nonlinear susceptibility is substantially induced by the ionization of the atom, leading to rapid fall of the nonlinear refractive index
Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, 2002
Summary form only given. We report spatial and temporal dynamics of femtosecond laser pulses obse... more Summary form only given. We report spatial and temporal dynamics of femtosecond laser pulses observed in argon and compare the results with theoretical calculations. The nonlinear optical phenomena such as spatiotemporal splitting and pulse shortening have been observed in detail.
Physical Review A, 2006
The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has be... more The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has been studied in gaseous media over a wide pressure range. The existence of two different types of optical supercontinua, structured and structureless, has been found in a number of atomic (argon, krypton) and molecular (methane) gases. The structured optical supercontinuum exhibits a typical oscillationlike spectral structure, resulting
Springer Series in Chemical Physics, 2005
A proposal for spectral broadening of tens milli Joule femtosecond laser pulses in an argon-fille... more A proposal for spectral broadening of tens milli Joule femtosecond laser pulses in an argon-filled hollow fiber is presented. The simulation results show that themethod could be useful under conditions where ionization plays a greater role and that it can be used to control ...
Springer Series in Chemical Physics, 2005
ABSTRACT
Physical Review A, 2001
... We investigate a simply corrected Keldysh-Faisal-Reiss KFR rate formula for laser-induced ion... more ... We investigate a simply corrected Keldysh-Faisal-Reiss KFR rate formula for laser-induced ionization of atoms in the nonperturbative intensity domain. Predictions of the formula are compared, first, with ab initio Floquet calculations, which show good agreement in the ...
Jurnal Teknik Mesin, 2000
A new method for continuous trans-esterification process that is based on the microwave heating, ... more A new method for continuous trans-esterification process that is based on the microwave heating, has been developed. The design consists of a microwave cavity, where in a transparent pipe is througly set up. This transparent pipe is used to continuously flow the biodiesel ...
jasosx.ils.uec.ac.jp
Page 1. Jc'sev c'vigioc't Numerical Simulation of Femto-and Subfemtose... more Page 1. Jc'sev c'vigioc't Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High-Order Harmonic Waves Muhammad NURHUDA, Akira SUDA,* and Katsumi MIDORIKAWA* Physics ...
Computer Physics Communications, 2001
A method to solve the time-dependent Schrödinger equation of the hydrogen atom and hydrogen-like ... more A method to solve the time-dependent Schrödinger equation of the hydrogen atom and hydrogen-like ions in intense laser pulses, based on an expansion of the total wavefunction in bound and continuum eigenstates of the unperturbed system, is presented. The problem arising from the well-known singular continuum–continuum dipole matrix elements is fully analyzed and resolved by a combination of analytical integration of the singular contribution and a numerical integration of the singularity-free difference contribution. Unlike in usual finite-difference methods using a spatial grid, in the present approach, probability amplitudes of bound–bound, bound–free and free–free transitions are obtained without additional calculations. The efficacy and accuracy of the present method is demonstrated by calculating above-threshold ionization spectra (ATI) and high harmonic generation spectra (HHG) for different values of laser parameters. Finally, the results obtained by using the present method are compared with that of a finite-difference method involving a spatial grid. The present method proves to be an efficient alternative to the usual spatial grid methods for the solution of the time-dependent Schrödinger equation and the estimation of ATI and HHG spectra in case of intense laser pulses.
Computer Physics Communications, 2004
In view of the controversy on atomic stabilization, two different methods for numerically integra... more In view of the controversy on atomic stabilization, two different methods for numerically integrating the time dependent Schrödinger equation (TDSE) are studied and compared, i.e. the direct integration on spatial grids (DISG) and the eigenstate expansion method (EEM) with exact treatment of free–free dipole matrix elements (FFDME). The simulations show that both methods provide the above threshold ionization (ATI) spectra and wavepacket densities that agree very well each other. This comparison is important regarding a claim that DISG may suffer a numerical instability due to the lack of FFDME [T. Mercouris et al., J. Phys. B 29 (1996) L13]. Using the eigenstate expansion method, a series of simulations with high frequency, ultra intense laser were carried out. The results show that the ionization yield first increases, and then decreases or stabilizes when intensity goes to a value beyond the turning point. Simulations using various pulse forms prove that the stabilization presents and is not subject to the pulse form.
Physical Review A, 2006
The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has be... more The dynamics of nonlinear optical conversion in the high-intensity femtosecond pump regime has been studied in gaseous media over a wide pressure range. The existence of two different types of optical supercontinua, structured and structureless, has been found in a number of atomic (argon, krypton) and molecular (methane) gases. The structured optical supercontinuum exhibits a typical oscillationlike spectral structure, resulting
REVIEW OF LASER …, 2000
... Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High... more ... Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High-Order Harmonic Waves. ... Title;Numerical Simulation of Femto-and Subfemtosecond Pulse Generation by Spectral Control of High-Order Harmonic Waves. ...