This chapter aims to clarify the concept of population balance model or population balance equation, terms that are used almost interchangeably in this book. This is followed by a short narrative of the strengths and weaknesses of these models. 1.1 What Are Population Balance Models? Population balance is not a well-defined concept in science and engineering, but means slightly different things to different people.
The present text introduces the use of population balances in the context of batch wet granulation
and coating systems and it reviews the latest achievements and proposals in the scientific
literature in this field. The nature and framework of population balance theory are highlighted and
one-dimensional population balances are introduced from scratch. This may seems tedious at first
but the derivation of even the simplest population balances is nevertheless not an easy task, and it
is in fact difficult to find complete derivations elsewhere in literature.
This is an introductory textbook on mathematical ecology bridging the subdisciplines
of population ecology and ecosystem ecology. The expected reader is you: a beginning
graduate student, advanced undergraduate student, or someone who thinks of
themselves as a student all their lives, with a working knowledge of basic calculus
and basic ecology. While this is intended as a stand-alone text, the level is such that
once you have read through it, you will be able to read more advanced texts and
monographs such as Ågren and Bosatta (1998) and Kot (2001) with greater depth.
This timely book describes the issues that compel us to craft a new social agenda for Latin America, which now needs to incorporate the challenges of the growing aging population. The region has improved the efficiency of its social policies, but we have a long road ahead and we need to continue innovating. Governments and the private sector must learn to balance the demands posed by a rapidly growing population of seniors while continuing to invest in the education of our youth and the needs of the poor. This book should be of interest to anyone with a serious interest...
Rice area of the Mekong Delta (MD) has decreased in recent years, especially the shift from rice land
into land for industrial parks and saline land due to sea level rise and effects of climate change. In
addition, the rate of population growth also requires increasingly high demand for rice in the region. By
using the model, results showed that the population of the Mekong Delta will be at 26,956.5 thousand
Soil fertility is critical for the provision of adequate food, fiber and renewable natural
resources(fuel,wood etc.). In the developing world soil fertility is linked to economic well
being of many farm families. Poor soils means poor harvest leading to low returns for the
over 60% of the population of developing countries relying on agriculture for survival.Use
of inorganic and organic fertilizers in addition to biological processes to improve the fertility
of the soil requires good understanding of their practical use and management.
We are living on an increasingly urban planet. In 2008 we passed the halfway
mark—50% of the world’s population now live in cities, and that percentage
is projected to increase to 70% by 2050. There is no turning back
the urban trend. Yet ironically we have as a species yet to successfully design
and plan cities that will accommodate our economic and demographic
needs while uplifting and elevating us, and protect, restore, and nurture
the planet and its natural systems.
Destination marketing is increasingly becoming extremely competitive worldwide. This paper
explains the destination concept and attempts to synthesise several models for strategic marketing
and management of destinations. It provides an overview of several techniques widely used and
illustrates examples from around the world. The paper also explains that marketing of destinations
should balance the strategic objectives of all stakeholders as well the sustainability of local
Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Biofeedback for training balance and mobility tasks in older populations: a systematic review
Dualism is a dominant theory of life that considers
reality to be a balance between two independent and
fundamental principles: good and evil, mind and
matter, nature and nurture. In the same manner we
see the thread of dualism run through the ecology of
parasitism: they can generate diversity but cause
extinction, they may castrate a host but increase its
growth rate, and they can stimulate an immune
response but at the same time encourage a secondary
In ancient times most of the population of China consisted of peasants. The people would work in
the fields all day until sunset, and then return to their homes to rest. Some would gather together and
listen to the stories of their elders, while others would go and enjoy the cool night air after the heat
of the day. Since the people enjoyed the refreshing nights more than the stifling days, they preferred
the moon to the sun; that is why the Chinese calendar follows the moon -it is a lunar calendar, as
opposed to the West's solar calendar....
In January 2009 WWF-UK launched its One Planet Food programme, which aims to reduce the
environmental and social impacts of food consumption in the UK. We work across the food chain to
reduce greenhouse gas emissions (GHGEs), protect biodiversity and reduce the impact of food on finite
water resources. The aim has always been to move away from unsustainable food choices, towards
sustainable ones that support global agriculture and biodiversity.
Since 1960 the world’s population has doubled, increasing the demand for food and impacting on the
climate and our ecosystems.
Musculoskeletal diseases are the most common causes of disability in developed
countries throughout the world, and in the United Kingdom, a signifi -
cant rheumatic disease affects one in seven of the population. They also affect
people from all walks of life and of all age groups including babies and the
very elderly. Rheumatic diseases are so common that it is inevitable that every
nurse will at some time provide care for a rheumatic patient. It is therefore
essential that they have some knowledge of rheumatology nursing.
Parkinsonism and Freezing Gait
Parkinson's disease (Chap. 366) is common, affecting 1% of the population 55. The stooped posture and shuffling gait are characteristic and distinctive features. Patients sometimes accelerate (festinate) with walking or display retropulsion. There may be difficulty with gait initiation (freezing) and a tendency to turn en bloc. Imbalance and falls may develop as the disease progresses over years.
NOTICE: The project that is the subject of this report was approved by the Gov-
erning Board of the National Research Council, whose members are drawn from
the councils of the National Academy of Sciences, the National Academy of Engi-
neering, and the Institute of Medicine. The members of the committee responsible
for the report were chosen for their special competences and with regard for ap-
The role of the board of directors therefore
becomes crucial in balancing the interests of shareholders and other stakeholders (eg.,
creditors and depositors). Consequently, bank regulators place additional
responsibilities on bank boards that often result in detailed regulations regarding their
decision-making practices and strategic aims. These additional regulatory
responsibilities for management have led some experts to observe that banking
regulation is a substitute for corporate governance.
The cloned guinea-pig Y2 neuropeptide Y (NPY) receptors expressed in Chinese hamster ovary (CHO) cells, as well as the Y2 receptors natively expressed in rat forebrain, are distributed in two populations. A smaller population that is readily accessed by agonist peptides on the surface of intact cells constitutes less than 30% of Y2 receptors detected in particulates after cell homogenization. A much larger fraction of cell surface Y2 sites can be activated by sulfhydryl modiﬁers.
Assessing the diversity of AnGR is made more difficult by the existence of many animal
populations that are not assigned to any recognized breed. Even though parts of these
“non-descript” populations are known to be multiple crosses of recognized breeds, some
animals may belong to (relatively) homogenous groups distinguishable from neighbouring
populations on the basis of identifiable and stable phenotypic characteristics (among which
may be unique and valuable attributes) that warrant their being distinguished as separate
Many governments acknowledge that environmental degradation and climate change pose
international and trans-boundary risks to human populations, economies, and ecosystems that
could result in a worsening of poverty, social tensions, and political stability. To confront these
global challenges, countries have negotiated various international agreements to protect the
environment, reduce pollution, conserve natural resources, and promote sustainable growth.