The fourth trimester

Brain Tumor in an In Vitro Fertilization–Facilitated Pregnancy: Fourth Ventricle Anaplastic Ependymoma in the Second Trimester

We present a case of fourth ventricle anaplastic ependymoma in a pregnancy which was the first result of three rounds of in vitro fertilization (IVF) and embryo transfer. Whether hormonal treatment can directly or indirectly precipitate brain tumors to develop or become symptomatic is unclear.

Fourth order and fourth sum connectivity indices of tetrathiafulvalene dendrimers

The m-order connectivity index (G) m of a graph G is     1 2 1 1 2 1 ... ... 1 ( ) i i im m v v v i i i m d d d  G where 1 2 1 ... i i im d d d  runs over all paths of length m in G and i d denotes the degree of vertex i v . Also,        1 2 1 1 2 1 ... ... 1 ( ) i i im m v v v i i i ms d d d X G is its m-sum connectivity index. A dendrimer is an artificially manufactured or synth...

Into the fourth dimension

The influence of time on the drought response of Brassica rapa, an agriculturally important species of plant, has been clarified.

The Fourth Dimension

Have you heard enough about consolidation and eliminating redundant costs from the distribution system? Are you tired of hearing that wholesalers must become more efficient and execute better? All of us hear these same themes over and over; and make no mistake, they partially define the trends shaping our industry for the foreseeable future. IBG understands these trends; we’ve talked about them...

The Fourth Industrial Revolution