Bea è forte, energica e a volte combinaguai. Leo, che abita dall'altra parte del cortile, è calmo, gentile e delicato. Il suo è un mondo particolare, tutto ovattato, fatto di un letto di piume, spigoli coperti da paracolpi, un tappeto morbido per terra. Il mondo di Leo è quello di chi soffre di fragilità ossea. Entrare nella sua vita richiede una delicatezza che Bea deve imparare. Ma Leo le piace, la affascina il suo mondo. Leo dal canto suo adora quella bambina e tra loro non può che nascere una grande amicizia fatta di piccoli passi delicati, di scoperte e di accettazione della diversità. Età di lettura: da 5 anni.

La nostra specie è solo l'ultimo ramoscello di un albero intricato di forme che si sono succedute e hanno convissuto negli ultimi sei milioni di anni. Ma quaranta millenni fa sulla Terra ancora coabitavano almeno cinque specie umane differenti, e con almeno due di queste Homo sapiens ha interagito e si è ibridato. Ma perché tutte queste specie umane in circolazione? Ciascuna era la discendente di una delle tante migrazioni di forme del genere Homo fuori dall'Africa.

Ventimiglia 1936. Nel castello di Serge Voronoff sono rinchiuse in una gabbia ottanta scimmie. Servono allo scienziato per le operazioni d'innesto di tessuto tra animale e uomo. Una notte la vita del castello è sconvolta da un delitto anomalo. A indagare è chiamato un investigatore privato, acuto e convenzionale, Martin Giles. Nonostante la sua presenza gli omicidi non si fermano, generando sospetti e odi tra gli abitanti del castello. È fra loro che si cela l'assassino? In un susseguirsi di colpi di scena, l'ineluttabile epilogo sconcerterà tutti, ma il più turbato sarà proprio l'investigatore, Martin Giles.

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Focusing on an approach of solving rigorous problems and learning how to prove, this volume is concentrated on two specific content themes, elementary number theory and algebraic polynomials. The benefit to readers who are moving from calculus to more abstract mathematics is to acquire the ability to understand proofs through use of the book and the multitude of proofs and problems that will be covered throughout. This book is meant to be a transitional precursor to more complex topics in analysis, advanced number theory, and abstract algebra. To achieve the goal of conceptual understanding, a large number of problems and examples will be interspersed through every chapter. The problems are always presented in a multi-step and often very challenging, requiring the reader to think about proofs, counter-examples, and conjectures. Beyond the undergraduate mathematics student audience, the text can also offer a rigorous treatment of mathematics content (numbers and algebra) for high-achieving high school students. Furthermore, prospective teachers will add to the breadth of the audience as math education majors, will understand more thoroughly methods of proof, and will add to the depth of their mathematical knowledge. In the past, PNA has been taught in a "problem solving in middle school” course (twice), to a quite advanced high school students course (three semesters), and three times as a secondary resource for a course for future high school teachers. PNA is suitable for secondary math teachers who look for material to encourage and motivate more high achieving students.

“Proofs and Fundamentals: A First Course in Abstract Mathematics” 2nd edition is designed as a "transition" course to introduce undergraduates to the writing of rigorous mathematical proofs, and to such fundamental mathematical ideas as sets, functions, relations, and cardinality. The text serves as a bridge between computational courses such as calculus, and more theoretical, proofs-oriented courses such as linear algebra, abstract algebra and real analysis. This 3-part work carefully balances Proofs, Fundamentals, and Extras. Part 1 presents logic and basic proof techniques; Part 2 thoroughly covers fundamental material such as sets, functions and relations; and Part 3 introduces a variety of extra topics such as groups, combinatorics and sequences.

This book provides a unique frame work for examining acute lung syndromes that arise from hematologic disorders or is defined by a hematologic abnormality as a key feature. Acute lung processes arising from hematologic disorders can present as life-threatening conditions, and as such, the pulmonary physician or critical care physician are often directly involved in care or called upon to provide expertise. Chapters are organized into three sections, each with an emphasis on pathogenesis and current understanding of mechanisms. The text begins with the central theme of the lungs as the direct interface between the external environment and blood, description of individual components of the hematopoietic system, their function and relevance to the lungs. The second section outlines both benign and malignant primary hematologic disorders that can lead to acute pulmonary manifestations. The final section focuses on acute lung syndromes stemming from complications of transfusion and treatment. Chapters are presented in an easy-to-access format, providing information on diagnosis, management, and outcomes. This is a valuable resource for pulmonary fellows in training, pulmonologists, critical care physicians, and physicians involved in caring for patients in the ICU.

Tonal music, from a historical perspective, is far from homogenous; yet an enduring feature is a background "diatonic" system of exactly seven notes orderable cyclically by fifth. What is the source of the durability of the diatonic system, the octave of which is representable in terms of two particular integers, namely 12 and 7? And how is this durability consistent with the equally remarkable variety of musical styles — or languages — that the history of Western tonal music has taught us exist? This book is an attempt to answer these questions. Using mathematical tools to describe and explain the Western musical system as a highly sophisticated communication system, this theoretical, historical, and cognitive study is unprecedented in scope and depth. The author engages in intense dialogue with 1000 years of music-theoretical thinking, offering answers to some of the most enduring questions concerning Western tonality. The book is divided into two main parts, both governed by thecommunicative premise. Part I studies proto-tonality, the background system of notes prior to the selection of a privileged note known as "final." After some preliminaries that concern consonance and chromaticism, Part II begins with the notion "mode." A mode is "dyadic" or "triadic," depending on its "nucleus." Further, a "key" is a special type of "semi-key" which is a special type of mode. Different combinations of these categories account for tonal variety.