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"The authors of this book believe that it should be possible for these professional mathematicians to explain to non-professionals what they do, what they say they are doing, and why the world should support them at it. They also believe that mathematics should be taught to non-mathematics majors in such a way as to instill an appreciation of the power and beauty of mathematics. Winner of the 1983 National Book Award, The Mathematical Experience conveyed the power and beauty of its topic to a broad audience. The study version added exercises and other classroom aids. "

"Secara matematis, melipat dapat dilakukan dengan merotasi bidang kertas yang ingin dilipat terhadap sumbu garis lipatan. Pemetaan dari kertas ke hasil lipatan origami dilakukan dengan merotasi bidang kertas yang sesuai. Apabila sebuah origami yang telah selesai dibuka kembali, terdapat garis-garis bekas lipatan pada kertas. Garis-garis lipatan ini disebut sebagai pola lipatan. Jika sebuah pola lipatan dapat dilipat, perkalian matriks-matriks rotasi sesuai merupakan matriks identitas. Hal ini berlaku pada origami simpul tunggal, dan berlaku secara lokal pada origami simpul jamak, namun dapat diperluas sehingga berlaku secara global pada origami simpul jamak.

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Mathematically, to fold a paper is to rotate the paper along a crease line as the axis. The mapping from the paper to the finished origami fold is done by rotating parts of the paper to the appropriate locations. Unfolding finished origami reveals a pattern of crease lines, known as crease pattern. If the crease pattern is foldable, then the product of the associated rotational matrices is the identity matrix. This condition holds in a single vertex crease pattern and holds locally in a multiple vertex crease pattern and can be adapted to a global condition in a multiple vertex crease pattern."

"The temperature and humidity inside poultry houses are highly coupled through nonlinear psychrometric processes, and the limitation of actuators makes this type of system difficult to control. To understand the dynamics of such systems and further to design a suitable controller, in this study, the mathematical model for a closed poultry house was derived from the governing equations of the various components related to the poultry house, including the energy and mass balance and the psychrometric correlations of the moist air. The model was simulated and the simulation result was compared to the data collected experimentally for model verification and control gains estimation. Under the assumptions of 70 percent Active Mixing Volume (AMV) with the constant maximum ventilation rate in the case study, the temperature and the relative humidity simulated results were in the good agreement with the real physical plant data. At the front, the middle and the rear part ofthe poultry house, the root-mean-square error (RMSE) obtained for internal temperatures are 1.17oC, 0.68oC, and 0.46oC, respectively. Andthose data for relative humidity are 4.31%, 8.07%, and 53.54%, respectively."

"The temperature and humidity inside poultry houses are highly coupled through nonlinear psychrometric processes, and the limitation of actuators makes this type of system difficult to control. To understand the dynamics of such systems and further to design a suitable controller, in this study, the mathematical model for a closed poultry house was derived from the governing equations of the various components related to the poultry house, including the energy and mass balance and the psychrometric correlations of the moist air. The model was simulated and the simulation result was compared to the data collected experimentally for model verification and control gains estimation. Under the assumptions of 70 percent Active Mixing Volume (AMV) with the constant maximum ventilation rate in the case study, the temperature and the relative humidity simulated results were in the good agreement with the real physical plant data. At the front, the middle and the rear part of the poultry house, the root-mean-square error (RMSE) obtained for internal temperatures are 1.17oC, 0.68oC, and 0.46oC, respectively. And those data for relative humidity are 4.31%, 8.07%, and 53.54%, respectively."

"The transition to motherhood may be difficult for some women. Part of the difficulty arises from the many new roles a woman must add to her preexisting roles. Most women make a successful transition to motherhood and adapt to their new roles. Taking on the role of motherhood and caring for an infant is satisfying (Brown, Lumley, Small, & Asbury, 1994; Lupton, 2000). However even within this group, women will report challenges in their lives, such as, trying to incorporate the infant into their busy lives. Positive appraisal and support from partners, family and health care professionals helps with a successful transition.While much has been written about the experiences of North American women in their transition to motherhood, there is little research-based information about the experiences of early motherhood in Indonesia. Anthropological studies examine becoming a mother as a "rite of passage? for a Women largely dealing with motherhood as being unproblematic. No nursing studies were located that examined this important phenomenon within the Indonesian culture. The need for knowledge about the experience of mothers among Indonesian women is important. Although motherhood is highly valued women can be expected to meet many ofthe same challenges that their counterparts in North American will meet as they become mothers for the first time. Many Indonesian women many at a young age and subsequently become mothers very early in their lives. Indonesian women experience high uncertainty about childbirth outcomes because there are high maternal and infant mortality rates (Departemen Kesehatan R.I., 1999). Many Indonesian women continue to follow traditional practices of postpartum care that make early motherhood highly ritualized. This may lead to conflict if health professionals do not recognize the importance of these practices to the mother and family. In order to plan effective nursing interventions to meet the health needs of new mothers and to assist them with a successful transition, it is important to have a better understanding of their situation. This study is an exploration of early motherhood among first time mothers in Indonesia through a phenomenological approach."