Basically, the Bernoulli integral is integral form of the homogeneous Bernoulli differential equation (BDE) of constant coefficients. Under proper transformation, the Bernoulli integral can be used to generate another integral formulation especially for integrals that can be transformed into arctangent DE. By using the Bernoulli integral, one can create its self the integral formulation of solving the physical problems, and hence reduces utilization the tables of integral. A special application in generating Euler formula also presented.

**Introduction**

Some of both modeling and problems in physics have been commonly presented in a first-order nonlinear differential equations (DE) of constant coefficients For instance, in designing electromagnetic apparatus [Markus,1979], the logistic growth process [Welner,2004], chaotic behavior [Barger et al,1995], the generation and propagation of soliton [Wu et al 2005],[Morales,2005], the transport of fluxon [Gonzile et al,2006], the generation of squeezed laser [Friberg,1996 ],etc. One requires Table of Integral to solve a specific integral for solving such differential equation [Spiegel,MR,1968]. To complete the Table of integral, we introduce Bernoulli integral that until now not including in both of the Table integral and mathematical Handbook. By using the Bernoulli integral, one can create the integral formulation required in solving the physical problems, and hence reduces utilization the Tables of integral.

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which its exact solution is of the form:

Eqs.(2)

Because of writer looks into this arctangent differential equation is having the religion character

(according to writer that for a=1, b=1, and both of initial values*t*_{0 }= 0 dan *y*_{0} = 0 the value of the tangent function at correspond to the Qidam and Baqa properties), hence solution yielded a solver technique entering religion factors must still appropriate to the exact solution

(according to writer that for a=1, b=1, and both of initial values

This paper introduces a new technique of solving a nonlinear first order ordinary differential equation so-called as SMT (stands for Stable Modulation Technique) which its solution is in the form of AF(A), that is a formula of modulation function which its amplitude term is also including in the phase function. The transfromation function applied for solving eq.(1) by using SMT is what gives its final solution in the form :

Eqs.(3)

The idea of developing this stable modulation technique based on the event of Isra’ and Mi’raj of prophet Muhammad, which alongside its journey towards Sidhratulmuntaha guided by angel Jibril. Eqs.(3) assures writer that when mi’raj the energy of prophet Muhammad is transferred into the energy form of modulated wave. The fundamental aspect for developing of modern mathematics and computing is obtained when to = 0, yo = 0, a = 0 dan b = 0 where eq.(3) then reduces to the form :

Eqs.(4) as a representative form of tangent function up to now has not been met in Mathematics Handbook, because the only

But both of eq.(4) and eq.(5) are still giving the same value with the value of tan(t) for all values of t except at t = pi / 2 in eq.(4) and at t = pi in eq.(5) which both giving value of 0/0, though value of tan(pi/2) = ~. In mathematics the value of 0/0 is unknown as commonly called as NaN (stands for Not a Number). The value of ~ is still not obtaining from eq.(4) and eq.(5), even if has been performed the limit operation because it is only giving devide by zero:

At presentation of the exact solution of arctangent differential equation brightens the confidence of writer that during journey Isra’, angel Jibril telling the exact properties of God, while during journey Mi’raj of prophet Muhammad is supplied by a stabilization of believe that God doesn’t spell out members as apparently at 0/0, and man will never can reach God will desire, as apparently at 1/0. The primary message is that mathematics applied as “approach” properly in the effort of explaining the Sunnatullah, and don’t make mathematics as a justification tool.

]]>**I. Introduction**

The phenomenon of the solitary wave propagation was observed for the first time by the Scottish scientist John Scott Russell in 1844, when one day he was watching water waves of a certain shape kept on traveling without changing their shape for a distance as far as his eye could see. To explain the behavior of such unusual wave, Korteweg and de Vries governed a model for the wave propagation in shallow water in form a partial differential equation called as KdV differential equation, which its solution appropriates to the features of the solitary wave called as soliton[1]. The existence of solitons in optical fiber was predicted by Zakarov and Zabat (1972) after they derived a differential equation for the light propagating in an optical fiber, that demonstrated later by Hazagawa in 1973 at Bell Laboratory. Next, Mollenauer and Stolen employed the solitons in optical fiber for generating subpicosecond pulses.

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]]>The Bernoulli differential equation that has been used as primary modeling in many application branches commonly contains harmonic force function in the inhomogeneous term. The nhomogeneous Bernoulli differential equation (IBDE) is specified by nonlinearity of nth order. For instance, 3rd order IBDE is called a stochastic differential equation that has been commonly applied for describing the corrosion mechanism, the transport of fluxon, the generation of squeezed laser, etc. Due to the difficulty of applying a linearization procedure for IBDE, it has commonly been solved numerically. In this paper we introduced a so-called Stable Modulation Technique (SMT) which is able to solve a first order nonlinear differential equation that transformable into the homogeneous Bernoulli differential equation (BDE). SMT is employed by splitting BDE into linear and nonlinear parts. The solution of its nonlinear part has been found to be AF(A) where A is the initial value of nonlinear solution part and F is the modulation function whose phase is a function of A. The general solution of BDE obtained by substituting the linear solution part into initial value of the nonlinear solution part. Although IBDE can not be transformed into BDE completely, SMT gives nevertheless an approximation solution in AF(A) form, where the homogeneous solution part becomes its amplitude term. The AF(A) formula for stochastic differential equation with cosine function as inhomogeneous term can be decomposed as well into transient and steady state solutions. In addition, a special example of solving 2 ogeneous Bernoulli differential equation (BDE) has en used as a primary modeling scheme in many ation branches. A nonlinear BDE is specified by a nonlinearity of n. Although the stochastic differential equation is the first order differential equation, nevertheless the procedure of obtaining its analytical solution is very complicated as shown in utilizing of BWK (Brillouin, Wenzel, Kramer) and Reversion methods nd order BDE in creating a new Planck’s formula of black-body radiation is also presented.

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]]>Albert Einstein is the greatest scientist in this century. Because of the greatness, he lifted by his follower as prophet of siences. So didn’t suprise if action of other scientist looked into justify his theory. Masya Allah, this is really abundant. Why? Ya, because in towards the prestisius throne of real sicence, Einstein is not only walks besides do small running („sai“ in term arabic), but he beforehand rides a delman Phytagoras and then takes a rides binomial bus. This statement not without a reason, because in mathematics context, the problem of special relativity only to be form of exploitation from Phytagoras theorem. Greatness of Einstein which is praiseworthy is his excess in exploiting the binomial approach of which is not thinking of other scientist. The fact, his special relativity only applied to movement of object which its speed (v) closing the velocity of light ().

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]]>The Ricatti differential equation dy/dt = P(t)y2+Q(t)y+R(t) is a nonlinear differential equation which is of contemporary interest in various fields, including particle dynamics, optics, and petroleum exploration. The Ricatti differential equation is easily solved by numerical methods. But in order to obtain the exact solution in analytical form, the first order of nonlinear inhomogeneous differential equation is commonly convert into a second order linear differential equation by use of a change of the dependent variable. In this paper we introduce the stable modulation technique (SMT) to solve the Ricatti differential equation without of the use linearization procedure. The main principle of the SMT in solving a first order nonlinear differential equation is modulate the solution of the linear part into the initial value of the nonlinear part solution. Important to be stressed here that the solution of nonlinear part must be written in the modulation function, where the initial value acts as amplitude and also including in the total phase shift. For a special case, dy/dt = -by2+ay+Acos(2πft) where a and b of both are constants, while t is variable of the time (in s), frequency f in Herzt (Hz) we find that the analytical solution of the SMT is appropriate with numerical solution espescially for high frequency f≥10 Hz, amplitude value A≤1, and initial value of the y in the range 0.1≤y0≤1. The analytical solution above can be used as trial function when the Ricatti differential equation will be solved by using combination of the modulational instability technique and variational approximation.

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]]>This paper reports derivation of a new Planck’s formula of spectral density of black-body radiation, that was originated by modeling the interpolation formula of Planck’s law of obtaining the mean of energy of black-body cavity in 2nd order of Bernoulli equation. The new Planck’s formula is created by means AF(A) diagram of solving arctangent differential equation after transforming the Bernoulli equation into the arctangent differential equation The New Planck’s formula not only contains the terms of the photon energy and the energy difference between two states of the motion of harmonic oscillator (), but also contains both terms of the minimum energy of harmonics oscillator () and the phase differences (ωh2/ωh2/π) as representing the intermodes-orthogonality, hence it can answer why the explanation of black-body radiation has been associated with the harmonic oscillators

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